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Vacula, Jan. "Jednoválcový čtyřdobý motor motokrosového motocyklu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231761.
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This diploma thesis is focused on construction of one-cylinder four stroke engine designed for motocross competition. The target was create the 3D model, which has foundation on the thermodynamic simulation. Kinematics of timing mechanism was designed in Lotus Simulation. For checking the main bearings life calculation was performed.
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Parenti, Stephanie. "Neocolonialism construction and solutions." Honors in the Major Thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/491.
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Many nation-states have their potential for growth hindered by the involvement of developed nations. These low-income nation-states are primarily located on the continent of Africa. There are three parts to this phenomenon of neocolonialism which is the process of continuing involvement of developed nations in developing nations that creates a negative growth in those nations. The research I've conducted is in three parts. The first consists of analyzing the social construction of neocolonialism, how the phenomenon occurs, and where it stems from. The second part is to show how this involvement is damaging to the developing nations. I will use examples such as the multinational corporation profit recycling, the life of foreign aid, and unwise economic deals. As it turns out the phenomena brings on the hindrance of developing in the low-income nation. The last part of my research is to come up with an economic improvement plan. For instance, rather than country A trading money (or some monetary value) for a resource in country B, "A" would build a school, hospital, or infrastructure in "B" to improve the conditions in the low-income nation. It is hypothesized that will leave room for growth in both nations without creating harmful economic repercussions because money would be taken out of the equation.B.A.
Bachelors
Sciences
Political Science
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Janné, Mats. "Construction Logistics Solutions in Urban Areas." Licentiate thesis, Linköpings universitet, Kommunikations- och transportsystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-147536.
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More and more people are living in, or moving to, urban areas than ever before. This attraction to urban areas means that new houses and work places are needed. Building new houses or renovating older housing stock is a natural way for a city to evolve. However, the end products of construction projects are produced at their place of consumption. This means that a multitude of materials and resources need to be delivered to, and removed from, each construction site. This leads to new transport flows being created in urban areas. In urban areas, these transports are subjected to space limitations, environmental demands, accessibility demands and noise restrictions. This has led to a situation where material deliveries to construction sites needs to be coordinated and managed in ways that reduce their impact on the urban transport system and at the same time ensuring efficient construction projects. In essence, construction in urban areas faces two problems; the urban transport problem and the problem of coordinating multiple construction stakeholders. One way to address these problems is through the use of construction logistics solutions such as terminals (e.g. construction logistics centres) and checkpoints. The aim of both types of solutions is to control and coordinate construction transports. In the construction industry, these solutions are however, still a rather new phenomenon. This means that how these solutions are perceived by different stakeholders, and the effect the solutions have on material flows and costs, needs to be explored further. The purpose of this thesis is to explore how construction logistics solutions can be used as a means to coordinate material flows to ensure efficient construction and reduce disturbances on the urban transport system. To achieve this purpose, the following research questions have been addressed: RQ1: How are different stakeholders in the construction industry affected by construction logistics solutions? RQ2: How will the use of construction logistics solutions affect material flows and costs in urban construction projects? To answer the research questions two main methodologies have been used; case study research for the empirical studies and literature reviews for the analysis of the case studies as well as for understanding how supply chain management, logistics, and third-party logistics affects the inter-organizational relationships of the construction industry. The main findings of the research are firstly that construction logistics solutions do have a role to play in the coordination of different construction stakeholders. Adding this new node will force construction stakeholders to address coordination issues in order to ensure that material deliveries arrive to construction sites on time. This also implies that new inter-organizational relationships will evolve, where communication is key. However, this may not be an easy task as it will call for an attitude adjustment towards a more open and collaborative environment. Secondly, adding a construction logistics solution can reduce some unnecessary friction between construction stakeholders and third parties. Coordinated material flows can lead to a reduction in the amount of material delivery vehicles that travels to site, thus alleviating some of the congestion in the urban transport system. This will not reduce all friction between construction projects and third parties, but it is a step in the right direction. Thirdly, a construction logistics solution must come with a set of regulations and a governance strategy from the initiator of the solution. This governance strategy must be clearly stated and communicated to the affected stakeholders. To alleviate animosity towards the solution, flexibility and stakeholder involvement is key. If the directly affected stakeholders are consulted on the function, chances are that they will be more accepting of the solution.
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Tsaxiri, Panagiota. "Problems and Solutions in Urban Construction Logistics." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-147856.
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The construction industry’s world is very complex, competitive and challenging. That means that everyone who is involved needs to be constantly updated and follow the latest technological trends and ideas to be able to work on a viable project by minimizing the problems. Nevertheless, there are always different complications that arise mainly because there is not much attention given to logistics and logistics solutions. The purpose of this thesis is to identify the major problems in the Swedish construction industry as well as their corresponding logistics solutions applied by different companies. Moreover, this research will try to investigate how the use of the fairly new concept of Construction Consolidation Centers can improve the situation primarily with the material transportation. The current thesis was conducted by investigating the relevant literature and arranging interviews with a few of the many consultant companies working in the construction industry. The outcomes from both investigations are analyzed and compared showing that there are important differences between the theory (literature review) and the reality (interviews) as some of the main problems in real projects do not appear in the current literature. It is also clearly exposed that Construction Consolidation Centers are a game changer to this kind of projects and such a solution is suggested from both sides, while there is high necessity from the companies to emphasize on the logistics and invest more on their logistics solutions.
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Tang, Wah Hau. "Knowledge management solution for railway construction /." access full-text access abstract and table of contents, 2009. http://libweb.cityu.edu.hk/cgi-bin/ezdb/thesis.pl?engd-meem-b23751071f.pdf.
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Thesis (Eng.D.)--City University of Hong Kong, 2009."Submitted to Department of Manufacturing Engineering and Engineering Management in partial fulfillment of the requirements for the degree of Engineering Doctorate. Includes bibliographical references.
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Qureshi, Muhammad Akber 1964. "Construction and solution of Markov reward models." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290583.
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Stochastic Petri nets (SPNs) and extensions are a popular method for evaluating a wide variety of systems. In most cases, the interesting measures regarding the system's characteristics can be defined at the net level by means of reward variables. Depending on the measures, these net-level reward models are solved either by first generating a state-level reward model or by directly generating paths from the net-level description. In this thesis, we propose algorithms for the generation of state-level reward models as well as for directly obtaining solutions from net-level reward models when the net-level reward models are specified as stochastic activity networks (SANs) with "step-based reward structure." Moreover, we propose algorithms for computing the expected value and the probability distribution function of a reward variable at specified time instants, and for computing the probability distribution function of reward accumulated during a finite interval. The interval may correspond to the mission period in a mission-critical system, the time between scheduled maintenances, or a warranty period; whereas the time instants may be critical instances during these intervals. The proposed algorithms avoid the construction of state-level representations and the memory growth problems experienced when applying previous approaches to large models. Furthermore, we study the effect of workload on the availability and response time of voting algorithms. Voting algorithms are a popular way to provide data consistency in replicated data systems. Many models have been made to study the degree to which replication increases the availability of data, and some have been made to study the cost incurred in maintaining consistency. However, little work has been done to evaluate the time it takes to serve request, accounting for server and network failures, or to determine the effect of workload on these measures. In this thesis, we use stochastic activity networks (SANs) to study the effect of work load on availability and mean response time of two variant models of a replicated file system to maintain data consistency, one using a static voting algorithm, the other using a dynamic voting algorithm.
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Chin, Ryan C. C. 1974. "Product grammar : construction and exploring solution spaces." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/28774.
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Thesis (S.M.)--Massachusetts Institute of Technology, School of Architecture and Planning, Program in Media Arts and Sciences, 2004.Page 79 blank.
Includes bibliographical references (p. 77-78).
Developing a design methodology that accounts for system- and component-level parameters in the design of products is a challenge for design and manufacturing organizations. Designed products like automobiles, personal electronics, mass-customized homes, and apparel follow design processes that have evolved over time into compartmentalized approaches toward design synthesis. Many products are designed "by committee" because the nature of the problem is sufficiently sophisticated that isolating the different disciplines of engineering, design, manufacturing, and marketing has become the only way to produce a product. This thesis rethinks design methods by critically analyzing design rules and their role in product development. Systematic and unbiased mapping of possible configurations is a method employed in generative design systems. A mapping of a solution space is achieved by parameterizing the constraints of the problem in order to develop a feasible envelope of possibilities at the component and system level. Once parametric modeling begins, then a flexible hierarchical and associative assembly must be put in place to integrate components into the product structure. What results is a complex tree structure of the possible solutions that can be optimized to ergonomic, structural, aerodynamic, manufacturing and material perspectives. The tree structure is organized so that any changes in the component structure can be accommodated at any level. Subsystems can then be easily substituted in order to fit to mass-customization preferences.
by Ryan C.C. Chin.
S.M.
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Malan, Heinrich. "A study on green building solutions in Botswana 2014." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/97177.
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Thesis (MBA)--Stellenbosch University, 2014.ENGLISH ABSTRACT: This research assignment was done to determine the status and awareness of green building solutions in Gaborone, Botswana for the year 2014. In a third world country like Botswana, design and development of ‘green building’ is low on the agenda. As with many other third world countries, other basic needs and services are missing and many people believe that all of those should be sorted out before items such as green building solutions can be looked at. Interviews were conducted with executives of companies in the property development industry or companies that make use of commercial office space. Through these executives, access was gained to the employees who were requested to complete an online survey. The focus of the interviews and surveys was to gain information of the companies’ awareness of and involvement in green building solutions, their view on the willingness to pay for such solutions and on its implementation in the future. In the findings, it became clear that cost is the most important aspect, especially when renting, while when investing, most participants were willing to contribute towards green building solutions with the understanding that this would contribute to lower running costs, and therefore returns on the investment made.
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Naz, Farah. "Developing transport performance measures for construction logistic solutions : A case study." Thesis, Linnéuniversitetet, Institutionen för ekonomistyrning och logistik (ELO), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-85768.
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Purpose The purpose of the study is to identify transport related performance measure within construction logistics in order to evaluate construction logistics solution. The aim is also to verify identified transport performance measures by available empirical data from both cases i.e. Case 1 and Case 2. Methodology This study is exploratory case study with qualitative research method. The research approach of this study is both deductive as well as inductive. Data has been collected from literature review, semi structured interview, focus group discussion and empirical data. Research question (RQ) RQ1 aims at identifying transport related performance measures and then classifying them according to terminal, checkpoint and their respective construction sites? The answer to this question lies in Figure 17 and 18. RQ2 refers to what kind of data is needed to measure identified transport performance measures. The answer to this question lies in the analysis of RQ2. RQ3 is related to what empirical data is available at construction logistics end. The answer to this RQ3 is that mostly the” duration of activities” has been found within both cases empirical data which seems to be insufficient to calculate identified performance measures in RQ3. RQ4 the aim of RQ4 is to find the gap between needed and available data. And the answer to this RQ can be found in Table 35. Conclusion Theoretical and practical case discussion of Case 1and Case 2 has given an in -depth view regarding the phenomena of construction logistics solutions. This paper will help in creating awareness among developer and main contractors regarding the benefit of construction logistics solution.
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Matta, Fabio. "Innovative solutions in bridge construction, rehabilitation, and structural health monitoring." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/MattaPhD_Dissertation_09007dcc8038f8b1.pdf.
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Thesis (Ph. D.)--University of Missouri--Rolla, 2007.Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed November 15, 2007) Includes bibliographical references.
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Van, der Bijl Rinske. "Bivariate wavelet construction based on solutions of algebraic polynomial identities." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20175.
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Thesis (PhD)--Stellenbosch University, 2012.ENGLISH ABSTRACT: Multi-resolution analysis (MRA) has become a very popular eld of mathematical study in the past two decades, being not only an area rich in applications but one that remains lled with open problems. Building on the foundation of re nability of functions, MRA seeks to lter through levels of ever-increasing detail components in data sets { a concept enticing to an age where development of digital equipment (to name but one example) needs to capture more and more information and then store this information in di erent levels of detail. Except for designing digital objects such as animation movies, one of the most recent popular research areas in which MRA is applied, is inpainting, where \lost" data (in example, a photograph) is repaired by using boundary values of the data set and \smudging" these values into the empty entries. Two main branches of application in MRA are subdivision and wavelet analysis. The former uses re nable functions to develop algorithms with which digital curves are created from a nite set of initial points as input, the resulting curves (or drawings) of which possess certain levels of smoothness (or, mathematically speaking, continuous derivatives). Wavelets on the other hand, yield lters with which certain levels of detail components (or noise) can be edited out of a data set. One of the greatest advantages when using wavelets, is that the detail data is never lost, and the user can re-insert it to the original data set by merely applying the wavelet algorithm in reverse. This opens up a wonderful application for wavelets, namely that an existent data set can be edited by inserting detail components into it that were never there, by also using such a wavelet algorithm. In the recent book by Chui and De Villiers (see [2]), algorithms for both subdivision and wavelet applications were developed without using Fourier analysis as foundation, as have been done by researchers in earlier years and which have left such algorithms unaccessible to end users such as computer programmers. The fundamental result of Chapter 9 on wavelets of [2] was that feasibility of wavelet decomposition is equivalent to the solvability of a certain set of identities consisting of Laurent polynomials, referred to as Bezout identities, and it was shown how such a system of identities can be solved in a systematic way. The work in [2] was done in the univariate case only, and it will be the purpose of this thesis to develop similar results in the bivariate case, where such a generalization is entirely non-trivial. After introducing MRA in Chapter 1, as well as discussing the re nability of functions and introducing box splines as prototype examples of functions that are re nable in the bivariate setting, our fundamental result will also be that wavelet decomposition is equivalent to solving a set of Bezout identities; this will be shown rigorously in Chapter 2. In Chapter 3, we give a set of Laurent polynomials of shortest possible length satisfying the system of Bezout identities in Chapter 2, for the particular case of the Courant hat function, which will have been introduced as a linear box spline in Chapter 1. In Chapter 4, we investigate an application of our result in Chapter 3 to bivariate interpolatory subdivision. With the view to establish a general class of wavelets corresponding to the Courant hat function, we proceed in the subsequent Chapters 5 { 8 to develop a general theory for solving the Bezout identities of Chapter 2 separately, before suggesting strategies for reconciling these solution classes in order to be a simultaneous solution of the system.
AFRIKAAANSE OPSOMMING: Multi-resolusie analise (MRA) het in die afgelope twee dekades toenemende gewildheid geniet as 'n veld in wiskundige wetenskappe. Nie net is dit 'n area wat ryklik toepaslik is nie, maar dit bevat ook steeds vele oop vraagstukke. MRA bou op die grondleggings van verfynbare funksies en poog om deur vlakke van data-komponente te sorteer, of te lter, 'n konsep wat aanloklik is in 'n era waar die ontwikkeling van digitale toestelle (om maar 'n enkele voorbeeld te noem) sodanig moet wees dat meer en meer inligting vasgel^e en gestoor moet word. Behalwe vir die ontwerp van digitale voorwerpe, soos animasie- lms, word MRA ook toegepas in 'n mees vername navorsingsgebied genaamd inverwing, waar \verlore" data (soos byvoorbeeld in 'n foto) herwin word deur data te neem uit aangrensende gebiede en dit dan oor die le e data-dele te \smeer." Twee hooftakke in toepassing van MRA is subdivisie en gol e-analise. Die eerste gebruik verfynbare funksies om algoritmes te ontwikkel waarmee digitale krommes ontwerp kan word vanuit 'n eindige aantal aanvanklike gegewe punte. Die verkrygde krommes (of sketse) kan voldoen aan verlangde vlakke van gladheid (of verlangde grade van kontinue afgeleides, wiskundig gesproke). Gol es word op hul beurt gebruik om lters te bou waarmee gewensde dataof geraas-komponente verwyder kan word uit datastelle. Een van die grootste voordeel van die gebruik van gol es bo ander soortgelyke instrumente om data lters mee te bou, is dat die geraas-komponente wat uitgetrek word nooit verlore gaan nie, sodat die proses omkeerbaar is deurdat die gebruiker die sodanige geraas-komponente in die groter datastel kan terugbou deur die gol e-algoritme in trurat toe te pas. Hierdie eienskap van gol fies open 'n wonderlike toepassingsmoontlikheid daarvoor, naamlik dat 'n bestaande datastel verander kan word deur data-komponente daartoe te voeg wat nooit daarin was nie, deur so 'n gol e-algoritme te gebruik. In die onlangse boek deur Chui and De Villiers (sien [2]) is algoritmes ontwikkel vir die toepassing van subdivisie sowel as gol es, sonder om staat te maak op die grondlegging van Fourier-analise, soos wat die gebruik was in vroe ere navorsing en waardeur algoritmes wat ontwikkel is minder e ektief was vir eindgebruikers. Die fundamentele resultaat oor gol es in Hoofstuk 9 in [2], verduidelik hoe suksesvolle gol e-ontbinding ekwivalent is aan die oplosbaarheid van 'n sekere versameling van identiteite bestaande uit Laurent-polinome, bekend as Bezout-identiteite, en dit is bewys hoedat sodanige stelsels van identiteite opgelos kan word in 'n sistematiese proses. Die werk in [2] is gedoen in die eenveranderlike geval, en dit is die doelwit van hierdie tesis om soortgelyke resultate te ontwikkel in die tweeveranderlike geval, waar sodanige veralgemening absoluut nie-triviaal is. Nadat 'n inleiding tot MRA in Hoofstuk 1 aangebied word, terwyl die verfynbaarheid van funksies, met boks-latfunksies as prototipes van verfynbare funksies in die tweeveranderlike geval, bespreek word, word ons fundamentele resultaat gegee en bewys in Hoofstuk 2, naamlik dat gol e-ontbinding in die tweeveranderlike geval ook ekwivalent is aan die oplos van 'n sekere stelsel van Bezout-identiteite. In Hoofstuk 3 word 'n versameling van Laurent-polinome van korste moontlike lengte gegee as illustrasie van 'n oplossing van 'n sodanige stelsel van Bezout-identiteite in Hoofstuk 2, vir die besondere geval van die Courant hoedfunksie, wat in Hoofstuk 1 gede nieer word. In Hoofstuk 4 ondersoek ons 'n toepassing van die resultaat in Hoofstuk 3 tot tweeveranderlike interpolerende subdivisie. Met die oog op die ontwikkeling van 'n algemene klas van gol es verwant aan die Courant hoedfunksie, brei ons vervolglik in Hoofstukke 5 { 8 'n algemene teorie uit om die oplossing van die stelsel van Bezout-identiteite te ondersoek, elke identiteit apart, waarna ons moontlike strategie e voorstel vir die versoening van hierdie klasse van gelyktydige oplossings van die Bezout stelsel.
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FILHO, WALTER DOS SANTOS TEIXEIRA. "LIGHT CONSTRUCTION SOLUTIONS FOR ARCHITECTURE PROJECTS IN HUMID, TROPICAL CLIMATES." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=22247@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROA presente tese trata de técnicas de baixo custo econômico, acessíveis à população e adequadas ao emprego de materiais que possam ser utilizados em seu estado natural, com pouco beneficiamento. O bambu, a terra crua e as fibras e resinas vegetais, são basicamente os materiais utilizados. Primeiramente foram realizados e testados objetos experimentais para funcionar como elementos de vedações, de cobertura, de sobrecobertura, de proteção externa – brise-soleil e arcos estruturais. Em seguida descreve o aperfeiçoamento de processos de encapsulamento do bambu em desenvolvimento no Laboratório de Investigação Livre Desenho da PUC-Rio. Dando continuidade ao trabalho sobre essas técnicas construtivas, a partir da manipulação de uma determinada bolha de sabão, foi elaborada uma série de modelos experimentais mecânicos e virtuais para uma sala multiuso de 7,70m x 6,00m de base, com altura de 3,20m, feita de fitas de bambu, mantas de barro cru, fibras e resinas vegetais. Na geometria destes modelos, paredes e cobertura se fundem em uma superfície contínua, com duas camadas superpostas, espaçadas e interligadas, formando uma casca que se apoia em toda a extensão do seu perímetro. A seguir, foi feita uma construção em escala real em que fitas de bambu descreviam a geometria base da bolha para testarmos de maneira não instrumentalizada possibilidades de montagem e desmontagem e os índices de resistência devidos ao particular formato da bolha. Finalmente, baseado neste último experimento, são apresentadas soluções gerais inovadoras para o conforto higrotérmico em climas tropicais úmidos que substituem a estratégia da inércia térmica dos materiais espessos e pesados pela leveza de uma dupla casca estrutural que abriga câmaras de ar ventiladas em seu interior.
This thesis studies low cost building techniques that are accessible to a wide range of population groups and are suitable for the use of materials in their natural state with little or no processing. The materials used are basically bamboo, raw earth and vegetable fibers and resins. First a series of tests were carried out with experimental objects to assess suitability for use as sealants, covering, outer covering and external protection – brise –soleil panels and structural arches. Following this, we describe the perfecting of the bamboo coating process in progress the Free Design Laboratory of Rio’s Catholic University. Building on these construction techniques, inspired by the manipulation of a soap bubble a series of experimental mechanical and virtual models were elaborated for a multi-use space measuring 7.7m by 6m at the base with a height of 3.2m, made of bamboo tapes, with a raw earth, fiber and resin covering. In the geometry of these models the walls and covering are a continuous surface with two layers one on another, separated but interconnected. In this way the outer wall is formed which extends over and is supported by the entire perimeter of the structure. The following step was to make a full scale construction in which bamboo tapes were used to form the geometric shape of the base of the bubble in order to do practical tests of the possibilities of assembly and disassembly of such a structure. Tests were also done on the resistance factors afforded by the singular bubble format. Finally, based on the previous experiment we present innovative solutions to the problem of hygrothermic comfort in humid tropical climates which substitute the thermal inertia strategy of thick, heavy building materials with the lightness of a double outer layer that holds ventilated air chambers between these layers.
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Côte, Raphaël. "Construction et propriétés de solutions pour des équations dispersives focalisantes." Cergy-Pontoise, 2006. http://www.theses.fr/2006CERG0298.
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Dans cette thèse, nous étudions quelques propriétés de solutions d'équations aux dérivées partielles dispersives focalisantes. On étudie deux types d'équations. Dans un premier temps, nous étudions les équations de Korteweg-de Vries généralisées (gKdV). Étant donnée une solution de l'équation de Korteweg-de Vries linéaire, nous construisons une solution de (gKdV) qui se comporte ainsi pour des temps grands. Étant également donnés N solitons (ondes solitaires solutions de (gKdV)), nous construisons, dans les cas L2-critique et sous-critique, une solution de (gKdV) se comportant comme la somme de ces N solitons et de la solution linéaire. Dans un deuxième temps, nous nous intéressons au système des wave maps en dimension. Critique (1+2) : c'est un modèle simple d'équation des ondes dans un cadre géométrique. Nous montrons que les fonctions harmoniques (wave maps stationnaires) sont instables dans l'espace d'énergie, en un sens fort, pour ce systèmeIn this work we study sorne properties of solutions to dispersive focalizing partial differential equations. We study two types of equations. In chapters 2 to 4, we study the generalized Korteweg-de Vries equations (gKdV). Given a solution to the linear Korteweg-de Vries equation, we construct a solution to (gKdV) which behaves like this for large times. Given N solitons solutions (stationnary wave solutions to (gKdV)), we construct in the L2-critieal and sub-critieal cases, a solution to (gKdV) which behaves like the sum of these solitons and of the linear solution. In chapter 5, we are interested in the wave map system in critical dimension (1+2) : this is a simple model for the wave equation in a geometrieal background. We prove that harmonie functions (stationnary wave maps) are instable in the energy space, in a strong sense, for this system
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Figueroa, Salgado Pablo Salvador. "Construction of Solutions to Liouville Type Equations on The Torus." Tesis, Universidad de Chile, 2011. http://www.repositorio.uchile.cl/handle/2250/102683.
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Gustafsson, Viktor, and Abedin Mahan Vosoughi. "Total cost analysis of alternative transport solutions for construction materials." Thesis, Linköpings universitet, Kommunikations- och transportsystem, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-134389.
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I examensarbetet utförs en totalkostnadsanalys av tre olika transportalternativ av gipsskivor till kontorsbyggen i citymiljö åt Skanska. I det ena alternativet levereras gipsskivorna direkt från fabrik till byggarbetsplats. I det andra alternativet köps gipsskivorna in från en grossist och i det tredje alternativet går gipsskivorna via en terminal hos en tredjepartslogistiker. Slutsatserna som tagits fram visar på att ett lågt inköpspris kan medföra öka kostnader längre fram i kedjan i form av sämre kvalité och längre väntetider för personalen.
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Alhajeri, M. "Health and safety in the construction industry : challenges and solutions in the UAE." Thesis, Coventry University, 2011. http://curve.coventry.ac.uk/open/items/8ef107a7-8740-4cb5-ad55-07449f57cad4/1.
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Health and safety issues have always been a major problem and concern in the construction industry. Wherever reliable records are available, construction is found to be one of the most dangerous on health and safety criteria, particularly in developing countries. Efforts have been made to address this problem, but the results have been far from satisfactory, as construction accidents continue to dominate the overall construction industry. Despite the programs implemented by government authorities and measures introduced by companies themselves, the number of construction accidents still remains alarmingly high. In developing countries, safety rules usually do not exist; if they do, the regulatory authority is usually very weak in implementing such rules effectively. The UAE is one of developing countries that are currently enjoying a strong growth in construction activities. Unfortunately, some sectors of its construction industry suffer from poor safety and health conditions. Any framework of the existing occupational and health conditions is fragmented and inadequately enforced, making construction sites more hazardous. It may even be argued that relevant regulations are outdated and irrelevant in day-to-day construction operations. From this perspective this research explores the approved methods adopted in the UK in order to improve the existing code of practice in the UAE and thus introduce the foundations on which appropriate health and safety systems may be built. A framework for Health and Safety management in the UK is suggested. To reach this objective an overview of the published materials as well as the legislation has been undertaken. Questionnaires were designed and distributed to potential construction industry players and interview sessions have been conducted to meet the first objective of the project which to determine the health and safety measures currently applied on construction sites. In addition, structured interviews were carried out with selected managers from a selection of construction and oil companies, medium and large size. This thesis specifically, it investigates the safety perceptions, attitudes, and behaviour of construction workers and management safety practices. Based upon the analysis of the results, this study has demonstrated that the majority of those questioned UAE construction companies have a poor degree of risk awareness and do not seems to take health and safety as an important issue.
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Jalal, Pasheu, and Mohamad Majed. "A research about logistical problems and solutions in the construction industry." Thesis, Linköpings universitet, Medie- och Informationsteknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-103828.
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Byggbranschen har på senare tid kännetecknats av höga kostnader och ineffektivitet. Byggtiderna blir allt längre och produktivitetsutvecklingen har länge haft en låg utveckling jämfört med andra branscher. Denna studie syftar till att sammanställa studier inom bygglogistik som gjorts de senaste 10 åren. Studien riktar sig till examensarbeten som handlar om bygglogistik och att sammanställa dessa efter problem och lösningar inom byggbranschen. Studien är uppdelad i två delar, en bred och en djup undersökning. I den breda undersökningen gallras, kategoriseras och klassificeras examensarbetet. Denna del utgör sedan en grund till urvalet av examensarbeten i den djupa undersökningen. I den djupa undersökningen analyseras de specifikt utvalda examensarbetena och sammanställs i tabell efter problem och lösningar. Resultatet av denna studie visar vilka problem och lösningar som är vanligast förekommande inom byggbranschen. Det visar även vilka lösningar som är vanligast till ett specifikt problem som fastställts med hjälp av de sammanställda rapporterna.
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Smith, Richard Dominic. "Hydrogen distribution and redistribution in the weld zone of constructional steels." Thesis, Brunel University, 1999. http://bura.brunel.ac.uk/handle/2438/4617.
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The invention of electric arc welding revolutionized the steel construction industry, but also brought some problems when the welded region has inferior properties compared to the plate metal. A major cause of brittle failure was identi ed as hydrogen embrittlement of the weld zone, although a comprehensive understanding of this phenomenon is not, even now, available. Hydrogen in solution in the weld zone is found in arc welds, due to the intense conditions in the welding arc. There is invariably a sufficient source in the form of moisture and hydrocarbon residue to give a few parts-per-million (ppm) by mass of hydrogen in the weld pool, which is a sufficient concentration to bring the possibility of hydrogen cold cracking in the completed weld. Hydrogen is significantly mobile in steels at room temperature, which is certainly why a few ppm of hydrogen can concentrate on a microscopic scale and initiate cracks, but also means that on a macroscopic scale there is hydrogen dispersion, which can relieve the cracking risk or place hydrogen in hydrogen cracking susceptible regions. The understanding of solubility and mobility of hydrogen in steels of different compositions and microstructures is therefore paramount. The question investigated in this work is whether the characteristics of the weld hydrogen cracking tendency can be explained by the features of weld hydrogen transport, especially when steel selection is a variable. Plate steel ranging from a 0.22%C pearlitic steel to a 0.05%C thermo-mechanically controlled-rolled and accelerated-cooled (TMCR-AC) high strength low alloy (HSLA) steel with no pearlite, plus a 0.4%C non-plate steel, were included in the experimental program. Welds were made with rutile ux-cored-wire (R-FCW) at two hydrogen levels, together with rutile shielded-metal-arc (R-SMA) welds. In order to investigate the di usion rates, a novel experiment has been devised. The welded plate has been milled away at an angle from the underside of the weld to provide increasing distances between the fusion boundary and the plate under-surface. The formation of hydrogen bubbles in glycerol enabled the measurements of the time dependent diffusion distances. The results clearly show a square root time correlation, as expected from the Fickian mechanism and enabled the calculation of diffusion coefficients for different steels. A nearly four fold difference was found between the steels, with the fastest hydrogen movement in the TMCR-AC steel. To reveal the initial distribution of hydrogen some samples were frozen immediately after welding and machined under liquid nitrogen. This test ruled-out any signi cant hydrogen dispersion during the deposition of the weld and during the cooling down period. The experimental data were interpreted using a new numerical computer model, based on random jumps of hydrogen between equivalent lattice sites. It is shown that this numerical model gives identical results to the analytical Fickian approach, but has the advantage that it can be used for any boundary shape. When this model has been applied to the experimental data, some unexpected features have been found. The amount of hydrogen emerging at surfaces distant to the weld was higher than expected from a concentration-driven mechanism; suggesting that a di erent transport mechanism should be applied. The numerical model has also indicated a discontinuity in the hydrogen concentration at the fusion boundary. It is a consequence of the model that hydrogen solubilities and di usivities are inversely related properties of the metal; a feature which is supported by experimental evidence. The tendency of hydrogen cracking to appear in the weld metal rather than in the heat-a ected-zone (HAZ) can thus be explained by higher di usivity of hydrogen in the plate metal. It appears that there is a relationship between the diffusivity and the microstructure, particularly when the content and form of carbon is considered.
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Gao, Karen Ging. "Photoresist removal using low molecular weight alcohols and IPA-based solutions." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/11875.
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Huang, Da. "Approximate analytical solutions for vibration control of smart composite beams." Thesis, Peninsula Technikon, 1999. http://hdl.handle.net/20.500.11838/1262.
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Thesis (MTech (Mechanical Engineering))--Peninsula Technikon, Cape Town,1999Smart structures technology featuring a network of sensors and actuators, real-time control capabilities, computational capabilities and host material will have tremendous impact upon the design, development and manufacture of the next generation of products in diverse industries. The idea of applying smart materials to mechanical and structural systems has been studied by researchers in various disciplines. Among the promising materials with adaptable properties such as piezoelectric polymers and ceramics, shape memory alloys, electrorheological fluids and optical fibers, piezoelectric materials can be used both as sensors and actuators because of their high direct and converse piezoelectric effects. The advantage of incorporating these special types of material into the structure is that the sensing and actuating mechanism becomes part of the structure by sensing and actuating strains directly. This advantage is especially apparent for structures that are deployed in aerospace and civil engineering. Active control systems that rely on piezoelectric materials are effective in controlling the vibrations of structural elements such as beams, plates and shells. The beam as a fundamental structural element is widely used in all construction. The purpose of the present project is to derive a set of approximate governing equations of smart composite beams. The approximate analytical solution for laminated beams with piezoelectric laminae and its control effect will be also presented. According to the review of the related literature, active vibration control analysis of smart beams subjected to an impulsive loading and a periodic excitation are simulated numerically and tested experimentally.
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El, Jaafari El Hassan. "Sur la construction des solutions périodiques autogénérées de deux équations différentielles non linéaires autonomes d'ordre trois." Toulouse 3, 1987. http://www.theses.fr/1987TOU30112.
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Ce mémoire porte essentiellement sur la construction analytique des solutions périodiques de deux équations différentielles non linéaires d'ordre trois autonomes. La première équation décrit un oscillateur électronique pratique a contreréaction. Nous avons construit une solution périodique, ayant une précision de quatre a six chiffres significatifs dans le domaine physiquement réaliste des paramètres. La seconde équation sans application connue, mais inspirée de l'étude d'une ligne de transmission à pertes compensées, possède des solutions périodiques et des solutions oscillatoires complexes. Utilisant trois méthodes analytiques différentes, nous avons construit certaines de ces solutions périodiques. Ces solutions éclairent la structure possible de toutes les solutions oscillatoires
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Hablot, Jean-Michel. "Construction de solutions exactes en élastoplasticité. Application à l'estimation d'erreur par apprentissage." Phd thesis, Ecole Nationale des Ponts et Chaussées, 1990. http://tel.archives-ouvertes.fr/tel-00518462.
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Le calcul par éléments finis des structures en élastoplasticité classique conduit à des dépenses informatiques très élevées, sans qu'on puisse estimer de façon correcte les erreurs commises. Dans notre travail, nous proposons une nouvelle méthode d'estimation a priori des erreurs. Nous construisons d'abord les solutions exactes de problèmes mécaniques par une méthode inverse. Ensuite, nous utilisons ces solutions exactes pour évaluer l'erreur commise lors d'une analyse numérique, avec des discrétisations spatiale et temporelle données. Enfin, nous utilisons cette base d'exemples de deux manières: 1) la recherche de règles simples de remaillage quasi optimal; 2) la construction, par des techniques d'apprentissage automatique, de règles générales donnant a priori la discrétisation nécessaire pour respecter une erreur fixée.
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Hablot, Jean-Michel. "Construction de solutions exactes en élastoplasticité. Application à l'estimation d'erreur par apprentissage." Phd thesis, Marne-la-vallée, ENPC, 1990. http://www.theses.fr/1990ENPC9012.
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Le calcul par éléments finis des structures en élastoplasticité classique conduit à des dépenses informatiques très élevées, sans qu'on puisse estimer de façon correcte les erreurs commises. Dans notre travail, nous proposons une nouvelle méthode d'estimation à priori des erreurs. Nous construisons d'abord les solutions exactes de problèmes mécaniques par une méthode inverse. Ensuite, nous utilisons ces solutions exactes pour évaluer l'erreur commise lors d'une analyse numérique, avec des discrétisations spatiale et temporelle données. Enfin, nous utilisons cette base d'exemples de deux manières: 1) la recherche de règles simples de remaillage quasi optimal; 2) la construction, par des techniques d'apprentissage automatique, de règles générales donnant a priori la discrétisation nécessaire pour respecter une erreur fixée.
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Villard, Caroline. "Sélection dans l'espace des solutions engendrées par un plan de construction géométrique." Université Louis Pasteur (Strasbourg) (1971-2008), 2001. http://www.theses.fr/2001STR13182.
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Bengtsson, David, and Tommy Magnusson. "Bengtsson_Magnusson_Durability of construction solutions with fiber-reinforced polymers (FRP) in pedestrian bridges." Thesis, Malmö högskola, Fakulteten för teknik och samhälle (TS), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-20825.
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Arbetet har genomförts i samarbete med Malmö Gatukontor med målet att samla in information om fiberförstärkta plastkompositer (fiber-reinforced polymer; FRP). FRP-kompositer kan vara ett intressant alternativ till konventionella byggnadsmaterial på grund av sina goda materialegenskaper. FRP har inte använts i gångbroar i Sverige tidigare och materialet är därför relativt okänt för byggbranschen. Studiens syfte var att undersöka och dokumentera beständigheten för FRP-gångbroar som påverkas av den omgivande miljön. Arbetet har genomförts som en litteraturstudie. Huvuddelen av studien fokuserade på att utvärdera olika nedbrytningsprocesser för att kunna bedöma potentiella svagheter hos FRP kompositer i gångbroar. Kopplingspunkter mellan olika delar i FRP broar har också studerats och dess inverkan på den totala beständigheten av konstruktionen har evaluerats. Studien ger en överblick av hur beständighetsparametrar för FRP-kompositer påverkas av olika typer av nedbrytning. Från denna överblick värderades nedbrytning genom fuktabsorption, höga och/eller cykliska temperaturer och UV-strålning som de faktorer som mest påverkar materialegenskaperna för FRP-kompositer. Studien konstaterar även att effekten av samverkan mellan olika nedbrytningsprocesser måste beaktas då materialet utsätts för flera olika angrepp i naturliga miljöer. Denna synergi gör att det är svårt att värdera effekten av varje enskilt angrepp. På grund av brist på information kunde inte kopplingspunkterna mellan komponenter i överbyggnadskonstruktionen i gångbroar fullständigt utvärderas, med avseende på dess påverkan på den totala beständigheten. Studien kunde dock konstatera att kopplingspunkter bör undvikas om det är möjligt, då vibrationer, utmattning och termisk expansion kan orsaka högre spänningsnivåer i kopplingspunkterna. Resultaten från studien syftar till att ge vägledande information vid projektering av gångbroar med FRP-kompositer.This bachelor thesis was written in cooperation with Malmö Streets and Parks Department to collect information on fiber-reinforced polymer (FRP) composites. In today’s building industry, FRP composites provide an interesting alternative to conventional building materials because of their superior material properties. FRPs are suggested to be a sustainable solution meeting the future requirements in infrastructure and especially bridge design. The use of FRP composites in pedestrian bridge applications have not previously been utilized in Sweden and thus the material is relatively unknown to the building industry. The aim of this study was primarily to examine the performance in terms of durability of FRP pedestrian bridges subjected to the effects of the surrounding environment by conducting a literature review. The main part of this study was to evaluate different types of degradation to assess the potential weaknesses of FRP composites during in-service use in pedestrian bridges. The connections between the different members and components in FRP bridges were also studied and their impact on the overall durability of the construction was evaluated. The results from this study provided an overview of the durability characteristics of FRP composites subjected to different types of degradation. From this overview it was concluded that degradation by moisture absorption, high and/or cyclic temperature, and UV-radiation had the most significant impact on the material properties in FRP composites. This study also concludes that the effects of synergism between the different types of degradation need to be considered since FRP composites are subjected to many types of degradations in natural environments. Because of the effects of synergism, the individual effects of the different types of degradations can be difficult to evaluate. Due to lack of information, the impact on overall durability in pedestrian bridges from the connections between components in the superstructure could not be fully evaluated. However, it was found that connections should be avoided if possible due to vibrations, fatigue, and thermal expansions that may cause higher stress levels in the connection points. The results of this study aims to provide guidance when designing FRP composite pedestrian bridges.
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Vozgirdaitė, Dovilė. "Moteriškos palaidinės priekio detalių konstrukciniai sprendimai." Bachelor's thesis, Lithuanian Academic Libraries Network (LABT), 2012. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2012~D_20120629_122733-09790.
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Bakalaurinio darbo tikslas – sumodeliuoti tris skirtingas moteriškas palaidines, ant vieno bazinio pagrindo. Darbo pradžioje pateikta mados krypties analizė, kurioje didelis dėmesys skirtas moteriškos palaidinės išvaizdai, konstrukcijai, modelių įvairumui bei spalvų gamai. Aprašyti projektuojamų modelių eskizai.Gaminio bazinė konstrukcija sudaryta remiantis anglų autoriaus Winifred Aldrich moteriškos palaidinės konstravimo metodika. Ant šios konstrukcijos atlikti trijų palaidinių priekio detalių konstrukciniai modeliavimai. Naudojant kompiuterinę programą COMTENS sudarytos to paties dydžio gaminio vieno ir dviejų komplektų išklotinės, apskaičiuotos medžiagų sąnaudos bei tarplekalinės atliekos. Išanalizuota kokybės kontrolės svarba gaminio projektavimo etapuose, kuri sudaryta galutinės kontrolės pagrindinių rodiklių lentelė.The goal of the thesis – to model three different blouses using one and the same basis. In the beginning of the work, the analysis of the fashion trend, where the most attention is paid to the look, construction, variety of model and the colour spectrum of the blouse, is presented. The sketches of the designed models are being described.The basic construction of the product is designed according to the Winifred Aldrich methodology of the women’s blouse. Three front detail constructional modelling is implemented in this construction.With the help of the computerized program COMTENS, the listing output of one and two set of the product of the same size were composed.
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Ferre, Jose L. "Construction management : a viable solution to traditional project delivery problems." Thesis, Georgia Institute of Technology, 1986. http://hdl.handle.net/1853/22378.
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Molnar, Joseph M. "Leadership and management, the solution to the construction industry crisis." Thesis, Springfield, Va. : Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA367212.
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Asmuni, Hishammuddin. "Fuzzy methodologies for automated University timetabling solution construction and evaluation." Thesis, University of Nottingham, 2008. http://eprints.nottingham.ac.uk/10514/.
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This thesis presents an investigation into the use of fuzzy methodologies for University timetabling problems. The first area of investigation is the use of fuzzy techniques to combine multiple heuristic orderings within the construction of timetables. Different combinations of multiple heuristic ordering were examined, considering five graph-based heuristic orderings - Largest Degree, Saturation Degree, Largest Enrolment, Largest Coloured Degree and Weighted Largest Degree. The initial development utilised only two heuristic orderings simultaneously and subsequent development went on to incorporate three heuristic orderings simultaneously. A central hypothesis of this thesis is that this approach provides a more realistic scheme for measuring the difficulty of assigning events to time slots than the use of a single heuristic alone. Experimental results demonstrated that the fuzzy multiple heuristic orderings (with parameter tuning) outperformed all of the single heuristic orderings and non-fuzzy linear weighting factors. Comprehensive analysis has provided some key insights regarding the implementation of multiple heuristic orderings. Producing examination timetables automatically has been the subject of much research. It is generally the case that a number of alternative solutions that satisfy all the hard criteria are possible. Indeed, there are usually a very large number of such feasible solutions. Some method is required to permit the overall quality of different solutions to be quantified, in order to allow them to be compared, so that the best may be selected. In response to that demand, the second area of investigation of this thesis is concerned with a new evaluation function for examination timetabling problems. A novel approach, in which fuzzy methods are used to evaluate the end solution quality, separate from the objective functions used in solution generation, represents a significant addition to the literature. The proposed fuzzy evaluation function provides a mechanism to allow an overall decision in evaluating the quality of a timetable solution to be made based on common sense rules that encapsulate the notion that the timetable solution quality increases as both the average penalty and the highest penalty decrease. New algorithms to calculate what is loosely termed the lower limits and upper limits of the proximity cost function for any problem instance are also presented. These limits may be used to provide a good indication of how good any timetable solution is. Furthermore, there may be an association between the proposed lower limit and the formal lower bound. This is the first time that lower limits (other than zero) have been established for proximity cost evaluation of timetable solutions.
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Espinouze, Sandrine. "Loi du maximum d'un processus stationnaire solution d'une équation différentielle stochastique." Clermont-Ferrand 2, 2002. http://www.theses.fr/2002CLF21361.
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Les outils probabilistes sont très utiles pour évaluer des caractéristiques pertinentes du comportement dynamique des structures en environnement sismique, en vue de leur analyse fiabiliste. On s'intéresse ici à la classe des structures modélisées par des oscillateurs (linéaires ou non) à un degré de liberté excités par des bruits blancs gaussiens. Le but est d'obtenir une expression simple, qui soit utilisable dans des calculs fiabilistes, de la fonction de répartition du maximum du déplacement solution de l'équation de la dynamique de l'oscillateur. Une étude bibliographique approfondie a fourni différents types de résultats. Un premier ensemble est composé d'expressions exactes, inutilisables en pratique. Des expressions asymptotiques (quand le temps d'excitation et/ou le seuil de franchissement tendent vers l'infini) ou empiriques (reposant sur des raisonements heuristiques) de la fonction de répartition forment les deuxièmes et troisièmes catégories de résultats. Pour le cas linéaire, le domaine de validité des différentes approximations est donné en fonction des paramètres de l'oscillateur. Aucune expression ne donnant de bons résultats dans le cas non linéaire, une nouvelle méthode d'approximation est proposée. Le principe est de remplacer la recherche de la loi du maximum du déplacement par la recherche de la loi du maximum d'une diffusion unidimensionnelle pour laquelle des éléments sont disponibles. Pour cela, un processus amplitude est construit. Un principe de moyennisation stochastique donne alors sa loi limite. Il s'avère que cette amplitude dite moyennée est une diffusion unidimentionnelle. Des expressions asymptotiques de la fonction de répartition du maximum d'un tel processus fournit d'excellentes approximations de la fonction cherchée
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Sixdeniers, Jean-Marc. "Constructions de nouveaux etats coherents a l'aide de solutions des problemes des moments." Paris 6, 2001. http://www.theses.fr/2001PA066229.
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Dans ce travail, nous developpons et generalisons la construction des etats quantiques collectifs, dits coherents, parametres par un unique nombre complexe, initiee par klauder et glauber dans les annees soixante. Nous sommes guides par la condition de fermeture (ou resolution d'unite), qui peut etre remplie par un tres grand nombre de situations caracterisant des hamiltoniens divers. La relation de fermeture avec la fonction de poids positive est equivalente a un probleme classique des moments de stieltjes ou de hausdorff, selon la forme du spectre discret de l'hamiltonien. Nous obtenons une large variete de solutions a ces problemes, majoritairement par l'emploi de la methode de la transformee de mellin et de ses differentes proprietes, entre autres la puissante propriete de convolution. Nous avons aussi entrepris l'utilisation de certaines series de nombres employes dans l'analyse combinatoire (nombres de bell, de catalan, nombres d'arrangements) qui servent ici de base a la construction de nouveaux etats coherents. L'etude systematique des proprietes physiques de tous ces etats (relation d'incertitude de heisenberg, squeezing, statistiques des fluctuations) ainsi que des hamiltoniens s'y rattachant, revele une considerable richesse de parametrisations possibles. En particulier, hormis des etats definis sur le plan complexe tout entier, nous trouvons des domaines de definition d'etats qui peuvent etre entre autres des disques, des cercles concentriques ou des plan troues.
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Migilinskas, Darius. "Solutions for technological and economic problems of construction in the case of uncertainty." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20101119_134622-82868.
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Uncertainty and risk management by means of classification, identification of sources, assessment of consequences and implementation of systematic means to reduce their impact and costs. Developed complex management of technological and economic problems of construction integrated into the automated design and management system of a building throughout the project life cycle. Automated management model and methodology for a construction project used to accumulate and correct data in the implementation of individual stages of a construction project and to analyse the alternatives of reducing the impact of uncertainties and risk on the final solution and results of a construction project developed.Naudojant neapibrėžtumų ir rizikos valdymą (klasifikuojant, nustatant šaltinius, įvertinant pasekmes bei imantis sisteminių priemonių) sumažinama neapibrėžtumų įtaka ir papildomos projekto išlaidos. Sukurtas kompleksinis statybos technologinių ir ekonominių uždavinių neapibrėžtumų valdymas integruotas į pastato automatizuoto projektavimo ir valdymo sistemą per visą projekto gyvavimo laikotarpį. Sukurtas statybos projekto automatizuoto valdymo modelis ir metodika, kuriais remiantis kaupiami bei koreguojami duomenys įgyvendinant statybos projekto etapus bei analizuojamos alternatyvos mažinant neapibrėžtumų ir rizikos įtaką galutiniam statybos projekto sprendiniui bei rezultatui.
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Sabattini, Alice, and Alice Magnani. "ECO|CASE Efficient Construction Options for Creating Affordable housing Solutions preventing Energy poverty." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23097/.
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ECO|CASE propone la riqualificazione di un lotto ad angolo nel quartiere Bolognina, a Nord Est della città di Bologna. L’area di progetto è situata in prossimità dell’insediamento storico e corrisponde a un nodo di cerniera tra il tessuto consolidato del quartiere e la prospicente nuova area di espansione.
La sfida del progetto è reinterpretare il modello insediativo originario in chiave contemporanea, connettendo le due aree attraverso un complesso volumetrico capace di accogliere un Mix funzionale che combini un’innovativa offerta abitativa e alcuni servizi complementari, attualmente non presenti nel quartiere.
Il modello abitativo proposto cerca di rispondere alle trasformazioni economiche e sociali contemporanee, immaginando alcuni profili di utilizzo che si discostano dai modelli di utenza consolidati.
In particolare, l’offerta è rivolta alle generazioni più giovani in uscita dai nuclei famigliari di provenienza e a profili dinamici e transitori legati alle condizioni del nuovo mercato del lavoro.
Abitazione di primo accesso: prima soluzione abitativa a cui un individuo può far fronte in modo autonomo.
Alloggio temporaneo: soluzione capace di soddisfare i bisogni dell’individuo in movimento (studente e/o lavoratore).
Questi modelli si riferiscono a una permanenza più o meno limitata, connotata da flessibilità e dinamicità in un arco temporale che non supera i cinque anni.
Inoltre, considerando i profili di reddito associati all’utenza, tendenzialmente medio-bassi, la tesi mira a verificare come le prestazioni termofisiche dell’involucro edilizio possano influenzare il rischio che le nuove abitazioni siano causa di povertà energetica.
Tramite l’analisi di diverse tipologie di involucro e rivestimento esterno, si è cercato di ridurre i costi dell’alloggio individuando una soluzione adeguata a utenti dal medesimo profilo di reddito.
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Rebai, Yomna. "Construction de solutions singulières pour certaines équations aux dérivées partielles elliptiques semi-linéaires." Cachan, Ecole normale supérieure, 1997. http://www.theses.fr/1997DENS0014.
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Les travaux presentes dans cette these portent sur la construction de solutions ayant un lieu singulier prescrit pour certaines equations aux derivees partielles elliptiques semi-lineaires. La methode qu'on utilise consiste a definir une famille de solutions approchees au probleme a partir de solutions particulieres radiales, puis a etudier le linearise de l'operateur considere en ces solutions approchees dans des espaces fonctionnels bien choisis en l'occurence les espaces de holder a poids. Enfin, la conclusion est obtenue en utilisant le theoreme des fonctions implicites ou le theoreme du point fixe. Dans le premier article, on construit une solution du probleme avec non-linearite sous-critique de lieu singulier egal a une sous-variete compacte sans bord. Dans le deuxieme article, on s'interesse au cas sur-critique et on montre l'existence de solution faible positive du probleme considere dans la boule unite, ayant une singularite non eliminable en un point fixe proche de l'origine. On donne en particulier une demonstration a un resultat concernant l'equation d'emden enonce par h. Matano. Dans le troisieme article, on generalise le resultat precedent au cas d'un nombre fini de singularites isolees, plus precisement, on montre l'existence d'un ouvert regulier connexe contenant un nombre fini de points fixes et l'existence d'une solution faible positive du probleme qui est singuliere en chacun de ces points. Le quatrieme article de la these est consacre a l'etude du probleme de yamabe singulier. On y montre un resultat de non existence de solution du probleme defini sur un ouvert etoile par rapport a un point qui a une singularite non emilinable en ce point. On y etend aussi les resultats de r. Mazzeo et f. Pacard au cas du probleme de yamabe defini sur un ouvert borne contenant deux points fixes. On donne une condition suffisante portant sur ces deux points pour qu'il existe une solution faible positive du probleme qui est singuliere en chacun de ces points.
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Sellami, Mohamed. "Optimisation et aide au choix de solutions globales fondations-superstructure en construction métallique." Chambéry, 1995. http://www.theses.fr/1995CHAMS001.
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Nous proposons dans cette these le systeme informatique focome pour la conception des postes fondations et superstructure en cm ainsi qu'une methodologie pour l'acquisition de nouvelles connaissances concernant l'optimisation de solutions globales fondations-superstructure. Le systeme focome s'appuie sur une modelisation conceptuelle des informations concernant les trois domaines techniques: le sol, les fondations et la superstructure. La base de donnees commune, et les modules d'evaluations techniques de la structure et des fondations sont implementes avec le langage oriente objet c++. Nous avons dote le systeme d'une methode d'optimisation du cout global des materiaux de la construction (poids d'acier et volume de beton). Cette methode consiste a generer automatiquement toutes les configurations realisables d'une structure en faisant varier certaines variables de conception: types d'appuis, types de nuds, etc et a etablir un diagnostic pour le dimensionnement optimal de ces configurations. Pour acquerir de nouvelles connaissances concernant la recherche de solutions optimales globales fondations-superstructure, le systeme focome peut etre utilise sous forme d'un simulateur: des simulations portant sur les portiques a nefs multiples ont ete effectuees en faisant varier les parametres caracterisant le sol et la superstructure les resultats obtenus ont ete exploites selon une methode adaptee permettant la deduction de regles expertes. Cette methode est basee sur les principes d'analyse multicritere. Les criteres retenus pour cette etude sont la quantite de beton des massifs de fondations et la quantite d'acier de la superstructure metallique
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Zatar, Abdallah. "Approche multicritère pour l'aide au choix d'une solution de plan masse bâtiment." Artois, 1997. http://www.theses.fr/1997ARTO0007.
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Le but de notre travail est de proposer une aide au choix d'une solution de plan masse bâtiment, respectant au mieux les objectifs du maître d'ouvrage. Le problème se pose en tout début de conception, c'est-à-dire lorsque les objectifs sont flous et les évaluations imprécises. Nous avons donc du résoudre un problème d'analyse de solutions non toutes admissibles dans un univers non déterministe. Le premier volet de notre travail est la construction du problème ; nous avons proposé un schéma conceptuel de plan masse contenant les objets de conception. Le deuxième volet de notre travail a consisté en la recherche de solutions admissibles et perfomrantes en univers déterministe. Nous avons proposé une méthode permettant d'obtenir des solutions admissibles ; elle est basée sur la prise en compte des interctions entre les variables de décision et sur la recherche de compromis. Une fois les solutions admissibles obtenues nous avons proposé une méthode d'amélioration par réduction progressive des intervalles d'admissibilité de chaque variable. Le troisième volet de notre travail a été analysé de l'imprécis des objectifs et des critères. Nous avons analysé plusieurs modèles pour les objectifs et pour les critères : déterministe, intervalles, sous-ensemble flou. Nous les avons introduits dans des méthodes multi-critères de type PROMETHEE et avons recherché des techniques permettant de gérr les différentes combinaisons entre objectifs et critères. Une étude de sensibilité à la stabilité de la décision a montré l'intérêt de cette approche. Elle a été facilité par la réalisation d'une maquette informatique
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Morrey, Nicola. "Enacting product-service business models : the role of lean thinking." Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/13591.
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As competitively tendering for work is becoming increasingly difficult, and with profit margins reducing, UK construction companies are looking to differentiate their offering to clients. Safely delivering on time, within budget and to the required quality standard is no longer a differentiator in a market where clients are demanding increased value, building information modelling and life cycle provision. Construction companies are therefore looking to extend their activities into business consulting, financing and operational services, which will provide new sources of revenue in addition to their core production activities. This holistic service should provide solutions that meet their client s business needs, not just their building needs, ultimately resulting in long-standing relationships that over time yield a more predictable, long-term return. Over half of the top 20 UK construction companies, by turnover, have stated their intent to provide solutions to their clients - the case study organisation in which this research has been carried out is one of those companies. Part of a group of companies, the case study company, Shepherd Construction Ltd (SCL), has a vision to deliver integrated solutions to their clients, with the ultimate aim being that companies across the group can pool their expertise and deliver a service offering unique to the industry. Existing literature states the characteristics that integrated solutions providers need to possess, and proposes models for how an organisation needs to structure itself to deliver a service. However, the applicability of these models to SCL was unknown, and along with current literature on how to enact the transition pathway being vague, highlighted an area for investigation. Since the aim of integrated solutions provision is the delivery of a service to the client that adds value, it was proposed that lean thinking could provide a means of enacting the P-S transition: the starting point for lean thinking is value (Womack & Jones, 2003). Lean thinking principles (Womack & Jones, 2003) state that value needs to flow through the value stream the series of actions that transform inputs into the completed output raising the further proposition that flow is required through the stages of the integrated solutions lifecycle (the value stream) in order to successfully deliver all aspects of the client s value proposition, i.e. the desired solution. As a long established main-contractor, or product provider, SCL s challenge to transition from products-to-services was set against a backdrop of inconsistent performance and loss of continuity of service at crucial pinch-points in the delivery process. The action research carried out therefore sought to understand these problems and develop practices based on lean thinking that could be implemented in the company to enable consistent delivery of integrated solutions, i.e. enable the products-to-service transition, and in doing so provide the basis for the wider group vision. An abductive approach was taken to the research strategy; the experiences of the participants involved in the changes prompted by the action research process were used to inform the development of new theories and practices, and evaluate them once implemented. The methods used for collecting data and accounting for the experiences of people in the company included observation, both participant and non-participant, semi-structured interviews and analysis of company records. The research findings show that lean thinking has a role to play in enabling an organisation to transition from the provision of products to services. Standard processes and tools, based on lean thinking and developed through the action research framework, are shown to be the basis for consistent and repeatable performance within the phases of the integrated solutions lifecycle. Flow of information through and between phases of the lifecycle is then shown to be essential to ensuring the client s value proposition is realised and information is not lost during the transitions between lifecycle phases. The operational framework for service delivery , one of the practices developed, itself a form of standardised work, draws on lean thinking to provide a structured, yet flexible, means of developing a plan for service delivery that is focused on the client and ensuring the client s definition of value flows through the integrated solutions value stream and is therefore continually understood, and ultimately delivered, by the whole team as the project progresses. The practices developed through the research the standard company management system, operational framework for service delivery , service delivery plan and maturity assessment are shown to have improved consistency and company performance, and to have contributed to improved customer satisfaction (the ultimate aim of delivering a service) such that the company is starting to be perceived in the marketplace as an integrated solutions provider. This research also contributes to existing theory by evidencing that the transition pathway from products-to-services isn t as smooth as current literature portrays. In trying to implement current models in a construction setting, the products-to-service transition has been problematised and deficiencies in existing characteristics and models identified. Along with showing that lean thinking provides a theoretical framework for enacting the products-to-service transition, the hybrid model of the integrated solutions lifecycle developed, along with the maturity assessment, provide new theoretical insights, such as the need for feedback loops between all phases of the lifecycle.
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Callahan, Daniel. "Construction and solution of an inverse problem posed by "Piekara’s Chair"." Thesis, Wichita State University, 2008. http://hdl.handle.net/10057/2021.
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The article "Piekara's Chair: Mechanical Model for Atomic Energy Levels" by Zofia Golab-Meyer presents a model of the real-world problem of determining classical energy states suitable for high school or undergraduate college students. This thesis combines this idea with simple geometry to demonstrate how "Piekara's Chair" may be posed and then solved as inverse problems in IR²Thesis (M.S.)--Wichita State University, College of Liberal Arts and Science, Dept. of Mathematics & Statistics
Includes bibliographical references (leaves 46-47)
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Callahan, Daniel Behrman Elizabeth. "Construction and solution of an inverse problem posed by "Piekara's Chair"." A link to full text of this thesis in SOAR, 2008. http://hdl.handle.net/10057/2021.
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Thesis (M.S.)--Wichita State University, College of Liberal Arts and Science, Dept. of Mathematics & StatisticsThesis (excluding code) ©Copyright 2008 Daniel Callahanunder the Creative Commons Attribution 3.0 Unported LicenseCode ©Copyright 2008 Daniel Callahan, released under the MIT License:Permission is hereby granted, free of charge, to any person obtaining a copy of thissoftware and associated documentation files (the "Software"), to deal in the Softwarewithout restriction, including without limitation the rights to use, copy, modify, merge,publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons towhom the Software is furnished to do so, subject to the following conditions:The above copyright notice and this permission notice shall be included in all copies orsubstantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIESOF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE ANDNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHTHOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISINGFROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OROTHER DEALINGS IN THE SOFTWARE. Includes bibliographical references (leaves 46-47).
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Bellido, Anne-Mercedes. "Construction de fonctions d'itération pour le calcul simultané des solutions d'équations et de systèmes d'équations algébriques." Toulouse 3, 1992. http://www.theses.fr/1992TOU30245.
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Le sujet de cette these est le calcul simultane des solutions d'un systeme d'equations algebriques dont on sait par ailleurs qu'il possede un nombre fini de solutions. On etudie tout d'abord le cas d'une equation. On dispose ainsi d'une fonction d'iteration qui permet d'approcher simultanement les seules racines reelles d'un polynome a coefficients reels. C'est un des resultats originaux de ce travail. Ensuite, le cas des systemes est approfondi, ce qui conduit a la construction de plusieurs classes de fonctions d'iteration: celles-ci sont nouvelles et l'ordre de convergence vers les solutions est quadratique. L'outil theorique pour les obtenir est l'interpolation polynomiale a plusieurs variables. Numeriquement, pour les systemes a coefficients reels, on observe une convergence vers toutes les solutions reelles quel que soit le point initial choisi. Cela permet d'etendre la conjecture de convergence globale sauf pour un ensemble de mesure nulle de points d'initialisation faite pour la fonction d'iteration de weierstrass pour les polynomes au cas de ces systemes
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Peoc'h, Mickaël. "Solutions élégantes à la psychose : aspects historiques, enjeux épistémologiques et clinique des constructions supplétives." Thesis, Rennes 2, 2018. http://www.theses.fr/2018REN20023.
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À travers une recherche historique, nous explorerons les modèles qui ont orientés successivement les cliniciens confrontés à la psychose, tant leurs conceptions à propos du traitement qu’à propos de l’évolution et de la terminaison de la pathologie mentale. Deux paradigmes actuels seront plus précisément questionnés : celui de la psychiatrie contemporaine qui redécouvre depuis peu les possibilités de rémission de la psychose ; et celui de la psychanalyse, qui propose une autre définition, tant de la psychose que de la guérison, particulièrement avec Lacan. Puis, en nous plaçant dans ce deuxième paradigme, nous nous appuierons sur la clinique pour montrer comment s’élaborent de façon dynamique les solutions élégantes à la psychose. Les notions lacaniennes de compensation, suppléance, sinthome seront explorées. Nous proposerons de lire les symptômes à partir de leur fonction dans l’économie subjective pour en dresser une cartographie clinique nécessaire pour sortir d’une vision déficitaire de la psychose. Puis, en nous appuyant sur les témoignages de deux sujets psychotiques, l’un ayant rédigé ses mémoires, l’autre rencontré durant plusieurs années, nous proposeront de montrer en quoi l’élaboration d’une solution élégante singulière peut être le résultat d’un processus subjectif. Il s’agit de défendre l’existence de possibilités de suppléances à la psychose clinique, d’en proposer une lecture qui ne cède pas sur la singularité, mais qui tienne compte de quelques balises propre à la structure et aux conditions du lien socialThrough a historical research, we will explore the models that guided the clinicians confronted to psychosis; their conception of the treatment as much as evolution and outcome of mental pathology. Two current paradigms will be discussed: the contemporary psychiatry, which is newly rediscovering the possibilities of a remission in psychosis; and psychoanalysis, that offers another definition of psychosis as much as another definition of recovery/healing, especially with Lacan teaching.Then, following this second paradigm, and helped with clinical cases studies, we will show the dynamic development of the elegant solutions to psychosis. We will explore the lacanian concepts of compensation, supplementation, and sinthome. We will suggest to read the symptoms from their role in subjective economy in order to draw a clinical map, which is an essential key to stop considering psychosis as a deficit. Finally, with the help of two psychotic subjects; one who wrote his memories, and one met during several years; we will suggest that elaboration of a singular elegant solution can be resulting from a subjective process. We will defend that supplementations to clinical psychosis exist. We will offer a reading that does not only consider singularity, but that also consider some specific markers of the psychotic structure regarding some social link conditions
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Wafai, Mohamad Hassan M. Haider. "Developing a methodology for technology transfer of advanced IT solutions in the construction sector." Thesis, University of Salford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.491795.
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This research is primarily concerned with the development of a sound methodological framework to approach and study the special construction context in order to analyse the adoptability and adaptability of IVET(s) in construction firms. The research design embraces the constructivist philosophy and involves three participative explorative cases studies.
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Grillot-Mousny, Michèle. "Sur la construction de solutions d'équations elliptiques non linéaires singulières sur une sous-variété." Tours, 1996. http://www.theses.fr/1996TOUR4003.
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Cette thèse se divise en trois parties. Dans la première partie, nous étudions l'existence, l'unicité et le comportement asymptotique des solutions d'équations elliptiques non linéaires dans un ouvert régulier, qui explosent sur le bord. La deuxième partie est consacrée à la classification des comportements asymptotiques à l'origine des solutions radiales de perturbations d'équations de type emden-fowler. La troisième partie est la plus importante. Nous construisons des solutions de différents types d'équations elliptiques non linéaires, singulières sur une sous-variété, en prescrivant leurs comportements asymptotiques au voisinage de cette sous-variété. Nous montrons aussi l'unicité de la solution dans une classe donnée
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Pedesseau, Laurent. "Modélisation atomique à l'équilibre de phases, périphases et interphases : vers l'application à des cristaux hydratés." Toulouse 3, 2004. http://www.theses.fr/2004TOU30286.
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La prise et le durcissement des matériaux de Génie Civil (plâtre, C-S-H) reposent sur des interactions entre cristaux et solutions ioniques. Ces interactions mettent en jeu des équilibres entre phases, leurs frontières (dites périphases) et des phases confinées entre périphases (dites interphases). La partie 1 "Concepts, méthodes et outils" introduit tout d'abord le concept phéno-corpusculaire proposé pour l'étude de ces équilibres, irréductibles à une approche macroscopique via la physique statistique, et d'autre part encore inabordables par la seule voie corpusculaire. Parmi les méthodes originales présentées, la méthode SASP ouvre la voie phéno-corpusculaire en physico-chimie; puis est proposée la méthode OPTASYM pour définir les positions d'atomes H inconnus dans certaines cristaux; enfin est exposée la méthode CAC exploitant simultanément expérience et simulation AFM. Quant aux outils numériques originaux, ils sont essentiellement dévolus au traitement conjoint cristal/solution, encore embryonnaire en modélisation moléculaire. La partie 2 "Equilibre massique de phases, périphases et interphases" s'attache tout d'abord à l'élaboration de structures atomiques complètes de cristaux (gypse, ettringite, thaumasite), de structures de molécules et ions, et de structure de solution grâce à la méthode SASP qui débouche numériquement sur la relation fondamentale concentrations/potentiels chimiques. Ces structures étant définies, leurs interactions sont d'abord traitées par docking entre faces cristallines et molécules ou ions. Puis l'interaction cristal/solution/cristal est présentée via SASP dans le cas d'une solution saturée de gypse. D'où, pour la première fois, l'obtention de la structure d'une interphase d'épaisseur < 1 nm. La partie 3 " Equilibre mécanique de phases, périphases et interphases " présente, tout d'abord, une étude critique de l'estimation par modélisation moléculaire des contraintes totales de cristaux et solutions ioniques. L'introduction du calcul des contraintes partielles, inabordable expérimentalement, est fort prometteuse pour relier résistance à rupture macroscopique et structure atomique. L'équilibre mécanique entre phases, périphases et interphases est tout d'abord examiné en déplacement normal jusqu'à rupture d'adhésion, pour divers couples de faces (120), (010) ou (-101), la solution interphase (CaSO4, CaCl2 ou Na2SO4) étant en situation ionique non équilibrée (pour simuler des états transitoires ou isolés) avec éventuellement de l'acide citrique. Puis cette étude est reprise en situation ionique équilibrée, via la méthode SASP, pour les faces (120) du gypse en solution saturée. Enfin une première illustration de cisaillement est donnée dans le cas d'interphase (120), en solution CaSO4 non équilibrée avec acide citrique. La conclusion souligne les avancées de ce travail en modélisation atomique de solution en présence de cristal, ainsi que ses perspectives placées dans l'optique générale phéno-corpusculaireThe setting and hardening of materials used in civil engineering (plaster, C-S-H) are based on interactions between crystals and ionic solutions. These interactions involve equilibriums between phases, their boundaries (referred to as periphases) and phases confined between periphases (referred to as interphases). Part 1, "Concepts, methods and tools", first introduces the pheno-corpuscular concept proposed for the study of these equilibriums that cannot be addressed in a macroscopic approach via the statistical physics or in a corpuscular approach alone. Among the original methods presented, the SASP method opens up the pheno-corpuscular pathway in physicochemistry; then is presented the OPTASYM method using molecular modelling to propose positions of H atoms unknown in certain crystalline structures; finally is exposed the CAC method based on a simultaneous use of AFM experiment and simulation. The original numerical tools are mainly devoted to joint crystal/solution processing, an area that is still at its beginnings in molecular modelling. Part 2, "Mass equilibrium of phases, periphases and interphases" first addresses the build-up of complete crystal atomic structures (gypsum, ettringite and thaumasite), of molecules and ions structures and of solution structures, the SASP method leading numerically, in this last case, to the fundamental relation between concentrations and chemical potentials. Once these structures have been defined, their interactions are first handled by docking between the crystalline faces and molecules or ions. The crystal/solution/crystal interaction is then presented using SASP, in the case of a saturated solution of gypsum. Whence, for the first time, the structure of an interphase of thickness < 1 nm. Part 3, "Mechanical equilibrium of phases, periphases and interphases", consists, first of all, of a critical study of estimation by molecular modelling of the total stresses of ionic crystals and solutions. The introduction of calculation of partial stresses, which cannot be performed by experiment, is particularly promising for linking macroscopic failure strength and atomic structure. Mechanical equilibrium between phases, periphases and interphases is first examined in normal displacement of various pairs of faces (120), (010) or (-101) until adhesion failure, the solution interphase (CaSO4, CaCl2 or Na2SO4) being in a non-equilibrium ionic situation (to simulate transitory or isolated states), possibly with citric acid. The study is then repeated in an equilibrium ionic situation using the SASP method for the gypsum faces (120) in a saturated solution. Finally, a first illustration of an interphase shearing is given in the case of faces (120), with a non-equilibrated solution of CaSO4 and citric acid. The conclusion underlines the progress made in this work on crystal/solution atomic modelling and its prospects within the overall pheno-corpuscular approach
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Callahan, Daniel Behrman Elizabeth. "Construction and solution of an inverse problem posed by "Piekara⁰́₉s Chair"." A link to full text of this thesis in SOAR, 2008. http://hdl.handle.net/10057/2021.
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Thesis (M.S.)--Wichita State University, College of Liberal Arts and Science, Dept. of Mathematics & StatisticsThesis (excluding code) ©Copyright 2008 Daniel Callahanunder the Creative Commons Attribution 3.0 Unported LicenseCode ©Copyright 2008 Daniel Callahan, released under the MIT License:Permission is hereby granted, free of charge, to any person obtaining a copy of thissoftware and associated documentation files (the "Software"), to deal in the Softwarewithout restriction, including without limitation the rights to use, copy, modify, merge,publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons towhom the Software is furnished to do so, subject to the following conditions:The above copyright notice and this permission notice shall be included in all copies orsubstantial portions of the Software.THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIESOF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE ANDNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHTHOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISINGFROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OROTHER DEALINGS IN THE SOFTWARE. Includes bibliographical references (leaves 46-47).
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Lucas, Tamara J. H. "Formulation and solution of hierarchical decision support problems." Thesis, Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/17291.
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Poiret, Aurélien. "Équations de Schrödinger à données aléatoires : construction de solutions globales pour des équations sur-critiques." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00771354.
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Dans cette thèse, on construit un grand nombre de solutions globales pour de nombreuses équations de Schrödinger sur-critiques. Le principe consiste à rendre la donnée initiale aléatoire, selon les mêmes méthodes que Nicolas Burq, Nikolay Tzvetkov et Laurent Thomann afin de gagner de la dérivabilité.On considère d'abord l'équation de Schrödinger cubique en dimension 3. En partant de variables aléatoires gaussiennes et de la base de L^2(R^3) formée des fonctions d'Hermite tensorielles, on construit des ensembles de solutions globales pour des données initiales qui sont moralement dans L^2(R^3). Les points clefs de la démonstration sont l'existence d'une estimée bilinéaire de type Bourgain pour l'oscillateur harmonique et la transformation de lentille qui permet de se ramener à prouver l'existence locale de solutions à l'équation de Schrödinger avec potentiel harmonique.On étudie ensuite l'effet régularisant pour prouver un théorème analogue où le gain de dérivée vaut 1/2-2/(p-1) où p correspond à la non linéarité de l'équation. Le gain est donc plus faible que précédemment mais la base de fonctions propres quelconques. De plus, la méthode s'appuyant sur des estimées linéaires, on établit le résultat pour des variables aléatoires dont la queue de distribution est à décroissance exponentielle.Enfin, on démontre des estimées multilinéaires en dimension 2 pour une base de fonctions propres quelconques ainsi que des inégalités de types chaos de Wiener pour une classe générale de variables aléatoires. Cela nous permet d'établir le théorème pour l'équation de Schrödinger quintique, avec un gain de dérivée égal à 1/3, dans le même cadre que la partie précédente.
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Labyed, Abdelkrim. "Construction des solutions périodiques des systèmes dynamiques non linéaires d'ordre quatre admettant deux fréquences propres." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376067749.
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Labyed, Abdelkrim. "Construction des solutions periodiques des systemes dynamiques, non lineaires d'ordre quatre admettant deux frequences propres." Toulouse 3, 1987. http://www.theses.fr/1987TOU30111.
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Etude des solution analytiques et numeriques d'une equation non lineaire d'ordre quatre, decrivant un oscillateur a feedback (contre reaction) issu d'une application concrete. Les regimes periodiques de cet oscillateur se sont averes quantitativement compliques mais qualitativement simples. Nous avons egalement etudie une classe d'equation modeles d'ordre quatre, actuellement sans application concrete connue et qui possedent des solutions oscillatoires complexes. Ces equations comportent des non linearites quadratiques et cubiques. Utilisant des series de poincare, nous avons construit des solutions approchees analytiques ayant une precision de quatre a six chiffres significatifs lorsque les solutions sont periodiques. Quand les solutions sont oscillatoires mais non periodiques, nos approximations sont satisfaisantes seulement dans un intervalle de t qui contient au plus trois ou quatre extrema successifs de la forme d'onde
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Kaing, Sao Serey. "Etude de solutions innovantes pour le rabotage de poutres de ponts mixtes de petites et moyennes portées." Rennes, INSA, 2008. http://www.theses.fr/2008ISAR0013.
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