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Dissertations / Theses on the topic 'Functional structure construction'
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Filipčíková, Petra. "Řízení stavební zakázky ve stavebním podniku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2017. http://www.nusl.cz/ntk/nusl-265647.
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Increasing competition in the construction market, the demands of investors and the unstable economic situation, these are factors which are forcing companies to effectively preparing and managing procurement. . The aim of this thesis is to describe and analyze the management of construction contracts in the selected company. Then the desired output is to design and documentation preparation supplying me selected buildings "Residential building Rieger" in Czech Budweis with the help of project management methods.
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Ptáček, Lukáš. "Polyfunkční dům." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-227485.
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The subject of this master’s thesis is elaboration of project documentation for a multi-functional building according to the actual standards and norms given by law. The object has four floor above the ground and one floor partly below ground level with nine flats and two commercial premises. Residential part and commercial premises are separated from each other operationally independent and accessible main entrances. The basisc are made from contrete strips. The house is made by a brick technology of a ceramic blocks. The external walls are insulated with certified contact thermal insulation system. The building is roofed with warm flat roof.
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Brown, David Colin. "A rich structure related to the construction of holomorphic matrix functions." Thesis, University of Newcastle upon Tyne, 2016. http://hdl.handle.net/10443/3532.
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The problem of designing controllers that are robust with respect to uncertainty leads to questions that are in the areas of operator theory and several complex variables. One direction is the engineering problem of -synthesis, which has led to the study of certain inhomogeneous domains such as the symmetrised polydisc and the tetrablock. The - synthesis problem involves the construction of holomorphic matrix valued functions on the disc, subject to interpolation conditions and a boundedness condition. In more detail, let 1; : : : ; n be distinct points in the disc, and let W1; : : : ;Wn be 2 2 matrices. The -synthesis problem related to the symmetrised bidisc involves nding a holomorphic 2 2 matrix function F on the disc such that F( j) = Wj for all j, and the spectral radius of F( ) is less than or equal to 1 for all in the disc. The -synthesis problem related to the tetrablock involves nding a holomorphic 2 2 matrix function F on the disc such that F( j) = Wj for all j, and the structured singular value (for the diagonal matrices with entries in C) of F( ) is less than or equal to 1 for all in the disc. For the symmetrised bidisc and for the tetrablock, we study the structure of interconnections between the matricial Schur class, the Schur class of the bidisc, the set of pairs of positive kernels on the bidisc subject to a boundedness condition, and the set of holomorphic functions from the disc into the given inhomogeneous domain. We use the theory of reproducing kernels and Hilbert function spaces in these connections. We give a solvability criterion for the interpolation problem that arises from the -synthesis problem related to the tetrablock. Our strategy for this problem is the following: (i) reduce the -synthesis problem to an interpolation problem in the set of holomorphic functions from the disc into the tetrablock; (ii) induce a duality between this set and the Schur class of the bidisc; and then (iii) use Hilbert space models for this Schur class to obtain necessary and su cient conditions for solvability.
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Thadani, Sunil. "Constructing functional models of a device from its structural description /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487854314873138.
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譚晓慧 and Xiaohui Tan. "Optimization and stability analysis on light-weight multi-functional smart structures using genetic algorithms." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B41290707.
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Tan, Xiaohui. "Optimization and stability analysis on light-weight multi-functional smart structures using genetic algorithms." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B41290707.
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Minarovič, Kamil. "Stavebně technologický projekt multifunkční budovy v Želatovicích." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372254.
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In this diploma thesis work is the goal of the construction technological project of a multifunctional building in Želatovicích. The content of this diploma thesis is the solution of the summary of the technical report, a study of the implementation of major technological stages, the time schedule of the main construction of the object, schedule object, the technological regulations for the monolithic ceiling structure and installation of steel structures, inspection and test plans, risk with subsequent security measures, itemized budget with bills of quantities, solving the major transport routes, design of mechanical assemblies and equipment to the construction site. The substrate was drawing documentation for the implementation of this construction.
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Arnst, Maarten. "Inversion of probabilistic models of structures using measured transfer functions." Châtenay-Malabry, Ecole centrale de Paris, 2007. http://www.theses.fr/2007ECAP1037.
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L'objectif de la thèse est de développer une méthodologie d’identification expérimentale de modèles probabilistes qui prédisent le comportement dynamique de structures. Nous focalisons en particulier sur l’inversion de modèles probabilistes à paramétrage minimal, introduits par Soize, à partir de fonctions de transfert expérimentales. Nous montrons d’abord que les méthodes classiques d’estimation de la théorie des statistiques mathématiques, telle que la méthode du maximum de vraisemblance, ne sont pas bien adaptées pour aborder ce problème. En particulier, nous montrons que des difficultés numériques, ainsi que des problèmes conceptuels dus au risque d’une mauvaise spécification des modèles, peuvent entraver l’application des méthodes classiques. Ces difficultés nous motivent à formuler l’inversion de modèles probabilistes alternativement comme la minimisation, par rapport aux paramètres recherchés, d’une fonction objectif, mesurant une distance entre les données expérimentales et le modèle probabiliste. Nous proposons deux principes de construction pour la définition de telles distances, basé soit sur la fonction de logvraisemblance, soit l’entropie relative. Nous montrons comment la limitation de ces distances aux lois marginales d’ordre bas permet de surmonter les difficultés mentionnées plus haut. La méthodologie est appliquée à des exemples avec des données simulées et à un problème en ingénierie civile et environnementale avec des mesures réelles<br>The aim of this thesis is to develop a methodology for the experimental identification of probabilistic models for the dynamical behaviour of structures. The inversion of probabilistic structural models with minimal parameterization, introduced by Soize, from measured transfer functions is in particular considered. It is first shown that the classical methods of estimation from the theory of mathematical statistics, such as the method of maximum likelihood, are not well-adapted to formulate and solve this inverse problem. In particular, numerical difficulties and conceptual problems due to model misspecification are shown to prohibit the application of the classical methods. The inversion of probabilistic structural models is then formulated alternatively as the minimization, with respect to the parameters to be identified, of an objective function measuring a distance between the experimental data and the probabilistic model. Two principles of construction for the definition of this distance are proposed, based on either the loglikelihood function, or the relative entropy. The limitation of the distance to low-order marginal laws is demonstrated to allow to circumvent the aforementioned difficulties. The methodology is applied to examples featuring simulated data and to a civil and environmental engineering case history featuring real experimental data
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Degand, Liesbeth. "Form and function of causation a theoretical and empirical investigation of causal constructions in Dutch /." Leuven : Peeters, 2001. http://catalogue.bnf.fr/ark:/12148/cb38834157p.
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Morapedi, Setumile. "The syntax of locative inversion and related constructions in Setswana : an approach to information structure in lexical functional grammar." Thesis, University of Sussex, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441626.
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Moudrá, Michaela. "Příprava a řízení stavební zakázky ve stavebním podniku." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240352.
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The aim of the thesis is to describe the preparation and management of construction contracts in terms of suppliers. In the thesis there are explained the basic terminology related to the preparation and management of construction contracts in terms of suppliers. The outcome of the thesis is the preparation of construction documentation from the supplier's perspective for the construction contract Agroturistika Kojatín.
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Pavan, Kumar Maareddygari Pavan Kumar, and Bharadwaj Yellambalse Prem Kumar Anoop Anoop. "Design and Construction of Chassis for Uniti L7e Vehicle." Thesis, Högskolan i Halmstad, Akademin för ekonomi, teknik och naturvetenskap, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-32946.
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Chassis is the primary structural component of an automobile. It is the main supporting structure of a vehicle to which all other systems like braking, suspension and differential are attached. In this thesis, a methodology for L7e category vehicle chassis design and structural stability analysis is presented. The present car being developed at Uniti Sweden AB is classified as L7e category vehicle as per the European Union, therefore the chassis developed in this thesis considers the specific characteristics that vehicles under this category demands for. A literature study is carried out to review various existing designs of vehicle chassis, latest innovations and advanced materials used to manufacture the same. The various types of forces and stresses commonly acting on chassis structures are analyzed and their effects on the vehicle is understood. After completing literature study, several findings are listed in a systematic manner, by providing ample arguments to justify each of them. The pro-con analysis is conducted to evaluate merits and demerits of each alternative type of chassis and the material to manufacture it. The most essential design criteria are derived from the QFD (Quality function deployment) which then acts as important guidelines during the actual design process. Structural chassis frame is designed as per the design criteria, using the CAD software CATIAV5R19 and the structural stability of the same is tested and analyzed using ANSYS 15.0 software. From the results of these analysis tests the static structural stability of the design is confirmed.
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Manente, Amélie. "Types de prédication en vietnamien : dynamique et variété des structures." Thesis, Paris 5, 2013. http://www.theses.fr/2013PA05H010/document.
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Dans cette thèse, nous présentons une analyse syntaxique du vietnamien de Hô-Chi-Minh-Ville, dans la lignée de la syntaxe fonctionnelle mise en place par André Martinet et développée par la suite par ses continuateurs. Dans un premier temps, nous nous sommes intéressée au degré d’opposition verbo-nominal en vietnamien : nous proposons tout d’abord une synthèse des travaux menés à ce sujet, avant d’exposer notre analyse en classes, en nous appuyant sur des critères strictement syntaxiques. Une étude syntaxique détaillée des modalités (déterminants non déterminables) – les modalités nominalisantes, les modalités de degré, les modalités prédicatives et les modalités injonctives – a été nécessaire. Ces unités permettent de distinguer des comportements différents, et l’identification des grandes classes lexicales du vietnamien : nominaux, adjectifs, modaux et verbaux. Il apparait que ces classes d’unités s’organisent en un continuum, avec à un pôle les nominaux, à l’autre les verbaux. Dans un second temps, l’analyse porte sur les différents types de structures prédicatives du vietnamien. La variété des constructions – nucléaires et connectives – est au centre de l’étude, ainsi que l’identification des différentes fonctions. Enfin, nous exposons une analyse des “séries verbales”, phénomène très courant en vietnamien, mais décrivant en fait des réalités très diverses. Tout au long de l’analyse, nous accordons une importance particulière à la variation et aux zones de changements (réanalyses, lexicalisations, grammaticalisations), faisant état de la dynamique des différentes structures et de la langue elle-même<br>We present here a syntaxic analysis of the Vietnamese language spoken in Ho Chi Minh City, in line with the functional syntax introduced by André Martinet and developed later by his followers. In a first part, we examined the extent of noun/verb opposition in Vietnamese. After a synthesis of work on this subject, we present our own analysis of the lexical classes, relying on strictly syntactic criteria. A detailed study of the syntactic modalités (undeterminable determinants) - nominalizing undeterminable determinants, undeterminable determinants of degree, predicative undeterminable determinants and injunctive undeterminable determinants - was necessary. These units are used to distinguish different behaviors, and leads to the identification of major lexical classes in Vietnamese: nominals, adjectives, modals and ‘verbals’. It appears that these classes of units are organized along a continuum. In a second part, the analysis focuses on the different types of predicative structures in Vietnamese. The variety of structures - nuclear and connective - is central to the study as well as the identification of the different functions. Finally, we present an analysis of "serial verb constructions" very common in Vietnamese, but actually reflecting very different realities. Throughout this study, we pay particular attention to the variation and change (reanalysis, lexicalizations, grammaticalizations), referring to the dynamics of the various structures and of the Vietnamese language itself
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McAuliffe, Janie A. "Effects of residential development and associated water pollution on fish community structure and nursery function of salt marsh tidal creeks in southeastern North Carolina." View electronic thesis (PDF), 2009. http://dl.uncw.edu/etd/2009-3/mcauliffej/janiemcauliffe.pdf.
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Fund, Marina. "Méthode pour l'évaluation des couvertures d'infrastructures routières et ferroviaires : Approche par la modélisation fonctionnelle d'un objet technique urbain." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1178/document.
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Les couvertures d'infrastructure de transport en milieu urbain sont des opérations urbaines répondant à un certain nombre de problématiques de politique publique relatives à des questions urbaines, foncières, etc. Elles s'attachent notamment à la résorption et au traitement de l'effet de coupure et autres nuisances générées par la présence de grand linéaires routiers ou ferroviaires au sein d'un tissu urbain dense. Ces interventions, résolument complexes, souffrent de l'absence de cadre spécifique et d'un manque de vision globale.Afin de proposer des méthodes et des outils d'évaluation des couvertures d'infrastructures en milieu urbain aux acteurs concernés par ces projets, ce travail de doctorat élabore une méthode fondée sur une approche systémique. La modélisation fonctionnelle permet d'intégrer la complexité que représente le système couverture d'infrastructure dans son contexte urbain et de formaliser les interactions caractérisant le système, les hiérarchiser et y associer des méthodes d'évaluations. Le travail de modélisation, dans sa phase de validation, est mené sur plusieurs couvertures, concernant des typologies d'infrastructures différentes et de contextes urbains contrastés. Des perspectives d'évaluation sont alors envisagées sur la base du modèle fonctionnel obtenu<br>Structural covers for transport infrastructures in an urban environment answer to public policy issues relating to urban questions, real estate questions, etc. They adress in particular the absorption and processing of the barrier effect and other nuisances generated by the presence of large road or rail linear within a dense urban fabric. These interventions, resolutely complexes, suffer from the absence of a specific framework and a lack of overall global vision.In order to propose methods and tools for urban structural cover assessment to the actors affected by these projects, this PhD work thesis develops a method based on a systemic approach. Functional modeling allows to integrate the complexity that represents the system infrastructure cover in its urban context, and to formalize the interactions that characterize the system, to prioritize them and to associate them evaluation methods. The modeling work in its validation phase is conducted on several structural covers, concerning different infrastructure types and contrasting urban contexts. Some perspectives of assessment are considered, based on the obtained functional model
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Pauley, Blaga Slavcheva. "Constructible circles on the unit sphere." CSUSB ScholarWorks, 2000. https://scholarworks.lib.csusb.edu/etd-project/1675.
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In this paper we show how to give an intrinsic definition of a constructible circle on the sphere. The classical definition of constructible circle in the plane, using straight edge and compass is there by translated in ters of so called Lenart tools. The process by which we achieve our goal involves concepts from the algebra of Hermitian matrices, complex variables, and Sterographic projection. However, the discussion is entirely elementary throughout and hopefully can serve as a guide for teachers in advanced geometry.
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Wilson, Joyce Anne. "Strategies for the construction and safe release of recombinant baculovirus with enhanced insecticidal properties, intracellular complementation of P74, structural properties of P10 and functional analysis of GP41." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq22503.pdf.
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Gredin, Anders, and Martin Freiling. "Sunda energieffektiva väggkonstruktioner för morgondagens flerbostadshus." Thesis, KTH, Byggteknik och design, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-102117.
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Detta examensarbete har utförts vid högskoleingenjörsprogrammet Byggteknik och design vid Kungliga Tekniska högskolan och i samarbete med Ramböll Sverige. Syftet med denna rapport är att undersöka och analysera dagens ytterväggskonstruktioner för framtidens energieffektiva flerbostadshus. Ytterväggskonstruktionen som är en del i byggnadens klimatskal, har en viktig och betydelsefull funktion för att kunna klara av framtida byggnaders energikrav. För att en väggkonstruktion ska fungera finns det en rad andra påverkande faktorer som måste tas hänsyn till. Därför kommer examensarbetet att fokusera på ytterväggskonstruktioners byggfysikaliska egenskaper såsom lufttäthet, fukt, uppbyggnad och beständighet. För att kunna lösa uppgiften har vi varit i kontakt med åtta olika byggnadsentreprenörer i Stockholmsområdet och utfört studiebesök ute i produktionen. Det finns flera faktorer som styr valet av ytterväggskonstruktion för projektet och på grund av detta finns det en rad olika typer av ytterväggskonstruktioner som används i dagens byggande av flerbostadshus. I vår jämförelse mellan sex olika ytterväggskonstruktioner har vi analyserat byggfysikaliska egenskaper och produktionsmetoder utifrån samma grundparametrar. Eftersom ytterväggarna skiljer sig mellan lätt respektive tung stomme har vi valt att presentera en från varje kategori. Enligt vår bedömning i vår analys har vi kommit fram till att en lätt utfackningsvägg med stålregelstomme och en tung väggkonstruktion med platsgjuten skalväggsstomme har de bästa förutsättningarna för att i framtiden utgöra de främsta alternativen inom ytterväggskonstruktioner för flerbostadshus.Rapporten är skriven för läsare som antas ha viss kunskap inom området byggteknik, dvs. den riktar sig främst till intressenter till byggbranschen och studenter inom området.<br>This thesis has been carried out at the Bachelor's program of construction engineering and design at the Royal Institute of Technology and in collaboration with Ramböll Sweden. The purpose of this report is to examine and analyze today's outer wall structures for the future of energy efficient buildings. The outer wall construction that is part of the building envelope has an important and significant flaw to meet future energy requirements of buildings. For a long time different wall construction projects have been designed to create wall panels with low U-values. For a wall structure to function, there are a number of confounding factors to be taken into account. Therefore, the thesis will focus on outer wall structure building physical properties such as air density, moisture, structure and stability. In order to solve the task we have been in contact with eight different contractors in the Stockholm area and conducted field trips out in production. There are several factors that determine the choice of exterior wall construction for the project and because of this there are a number of different types of exterior wall structures used in today's construction of apartment buildings. In our comparison of six different wall constructions, we have analyzed the construction of physical characteristics and production methods on the same basic parameters. Since the outer walls differ between light and heavy body, we have chosen to present one from each class. Our conclusion is that a light stud walls with steel stud frame and a heavy wall construction with in-situ shell wall structure is best equipped to continue being the main option in exterior wall construction for apartment buildings. The report is written for readers who knowledgeable in the field of building technology, i.e. it is mainly addressed to interested parties in the construction industry and students in the field.
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Saadé, Katy. "Finite element modeling of shear in thin walled beams with a single warping function." Doctoral thesis, Universite Libre de Bruxelles, 2005. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/211043.
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The considerable progress in the research and development of thin-walled beam structures responds to their growing use in engineering construction and to their increased need for efficiency in strength and cost. The result is a structure that exhibits large shear strains and important non uniform warping under different loadings, such as non uniform torsion, shear bending and distortion.<p><p>A unified approach is formulated in this thesis for 3D thin walled beam structures with arbitrary profile geometries, loading cases and boundary conditions. A single warping function, defined by a linear combination of longitudinal displacements at cross sectional nodes (derived from Prokic work), is enhanced and adapted in order to qualitatively and quantitatively reflect and capture the nature of a widest possible range of behaviors. Constraints are prescribed at the kinematics level in order to enable the study of arbitrary cross sections for general loading. This approach, differing from most published theories, has the advantage of enabling the study of arbitrary cross sections (closed/opened or mixed) without any restrictions or distinctions related to the geometry of the profile. It generates automatic data and characteristic computations from a kinematical discretization prescribed by the profile geometry. The amount of shear bending, torsional and distortional warping and the magnitude of the shear correction factor is computed for arbitrary profile geometries with this single formulation.<p><p>The proposed formulation is compared to existing theories with respect to the main assumptions and restrictions. The variation of the location of the torsional center, distortional centers and distortional rotational ratio of a profile is discussed in terms of their dependency on the loading cases and on the boundary conditions.<p><p>A 3D beam finite element model is developed and validated with several numerical applications. The displacements, rotations, amount of warping, normal and shear stresses are compared with reference solutions for general loading cases involving stretching, bending, torsion and/or distortion. Some examples concern the case of beam assemblies with different shaped profiles where the connection type determines the nature of the warping transmission. Other analyses –for which the straightness assumption of Timoshenko theory is relaxed– investigate shear deformation effects on the deflection of short and thin beams by varying the aspect ratio of the beam. Further applications identify the cross sectional distortion and highlight the importance of the distortion on the stresses when compared to bending and torsion even in simple loading cases. <p><p>Finally, a non linear finite element based on the updated lagrangian formulation is developed by including torsional warping degrees of freedom. An incremental iterative method using the arc length and the Newton-Raphson methods is used to solve the non linear problem. Examples are given to study the flexural, torsional, flexural torsional and lateral torsional buckling problems for which a coupling between the variables describing the flexural and the torsional degrees of freedom occurs. The finite element results are compared to analytical solutions based on different warping functions and commonly used in linear stability for elastic structures having insufficient lateral or torsional stiffnesses that cause an out of plane buckling. <p><br>Doctorat en sciences appliquées<br>info:eu-repo/semantics/nonPublished
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Kulkarni, Shashank D. "Development and validation of a Method of Moments approach for modeling planar antenna structures." Worcester, Mass. : Worcester Polytechnic Institute, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-042007-151741/.
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Dissertation (Ph.D.)--Worcester Polytechnic Institute.<br>Keywords: patch antennas; volume integral equation (VIE); method of moments (MoM); low order basis functions; convergence. Includes bibliographical references (leaves 169-186 ).
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Chouaki, Amar. "Recalage de modèles dynamiques de structures avec amortissement." Cachan, Ecole normale supérieure, 1997. http://www.theses.fr/1997DENS0034.
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La maitrise de modèles de plus en plus complexes en mécanique est une préoccupation constante tant au niveau industriel qu'en recherche. Le problème auquel nous nous intéressons ici concerne le recalage de l'amortissement dans les modèles dynamiques de structures à partir de fonctions de réponses en fréquences. D'une manière plus générale, l'appréciation de la qualité d'un modèle est le problème central. Bien des propositions ont été faites mais peu ont une interprétation mécanique forte ; la méthode développée au LMT, depuis le début des années quatre vingt, est basée sur la notion d'erreur en relation de comportement. Après de récents développements (voir le rapport interne 150), cette approche tient compte des effets d'amortissement, et plus généralement des effets non-linéaires dus au comportement des matériaux. De plus, elle intègre tous type de résultats expérimentaux disponibles (statiques, forces et vibrations libres). L'étude présentée s'intéresse particulièrement à l'amortissement. Le recalage de l'amortissement dans le comportement dynamique des structures nécessite une représentation correcte de celui-ci. Son influence peut apparaitre tant au niveau structural qu'au niveau des liaisons entre sous-structures. La première partie de l'exposé concerne l'étude de la sensibilité de l'erreur en relation de comportement aux effets d'amortissement. Puis, dans une seconde partie, nous nous intéressons à l'influence du bruit de mesure sur le processus de recalage. Enfin, nous montrons sur différents exemples l'aptitude de la méthode à recaler l'amortissement et à l'identifier dans les liaisons entre sous-structures. Les modèles considérés sont linéaires et les résultats d'essais exploités sont de type fonctions de réponses en fréquences, incomplets et entaches de bruit de mesure.
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Bin, Fazail Muhammad Najib. "Caractérisation de l’amortissement des structures complexes par la méthode de corrélation." Electronic Thesis or Diss., Compiègne, 2023. http://www.theses.fr/2023COMP2718.
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Le travail de thèse porte sur la caractérisation de l’amortissement des structures complexes par la méthode de corrélation. Dans le premier chapitre, un état de l’art rassemblant de nombreuses méthodes de caractérisations locales et globales est présenté. Dans la deuxième partie du chapitre, les méthodes de mesures expérimentales de l’amortissement et un modèle analytique de référence sont abordés. Dans le deuxième chapitre, la méthode Inhomogeneous Wave Correlation (IWC) qui calcule la corrélation entre le champ de déplacement mesuré et une onde plane inhomogène est revisitée. Une nouvelle variante qui considère la décroissance exponentielle avec la distance du point d’excitation dans la formulation d’onde inhomogène est introduite. L’introduction de cette variante a pour but d’améliorer l’estimation de l’amortissement. La validité de la méthode proposée est étudiée numériquement sur des structures planes avec différents degrés de complexité. Les performances de la méthode en fonction la position du point d’excitation et de la taille de la fenêtre d’observation sont également étudiées. Un nouveau modèle de corrélation basé sur la fonction de Green permettant d’estimer les paramètres élastiques équivalents des structures complexes en fonction de l’angle de propagation est détaillé dans le troisième chapitre. Contrairement à la méthode IWC mentionnée ci-dessus, le champ de déplacement mesuré est désormais corrélé avec un modèle basé sur la fonction de Green. Cette dernière est plus adaptée pour décrire le champ proche du point d’excitation et offre plus de stabilité sur l’estimation de l’amortissement comparée aux méthodes précédentes. Plusieurs résultats, avec des données simulées et mesurées, sont comparés au modèle analytique et montrent la précision de cette technique pour estimer précisément l’amortissement des structures complexes en fonction de la fréquence et de l’angle de propagation des ondes. Dans la deuxième partie du chapitre, la performance de la méthode sur l’estimation de l’amortissement en fonction des différents points d’excitation est également étudiée et un filtre angulaire spatial est introduit pour améliorer le résultat. Dans le quatrième chapitre, la méthode des sources images qui a pour objectif d’améliorer l’estimation de l’amortissement en basses fréquences des structures faiblement amorties est introduite. Cette approche prend en compte les réflexions des ondes de flexion aux frontières. La performance de la méthode est étudiée sur deux types de conditions limites : bords simplement appuyés et bords libres. Le résultat est comparé à la méthode introduite dans le troisième chapitre ainsi qu’au modèle analytique GLM<br>The thesis presents inverse correlation techniques able to measure accurately the damping loss factor of complex plane structures. In the first chapter, the state of the art gathering numerous local and global characterization methods is presented. In the second part of the chapter, various topics of direct interest to the thesis such as classical damping loss factor measurement techniques and the analytical solution based on the discrete general laminate model (GLM) are briefly discussed. In the second chapter, the inhomogeneous wave correlation (IWC) method based on the maximization of the correlation between an inhomogeneous wave and the measured displacement field as a function of the wave heading angle is revisited. A new variant that considers the exponential decay with distance from the excitation point in the inhomogeneous wave formulation is introduced. The purpose of introducing this variant is to improve the estimation of the damping loss factor. The validity of the proposed method is investigated numerically on flat thin structures and sandwich damped structures. The performance of the method related to the excitation point location and the size of the observation window are also investigated. A new Green’s function-based model correlation (GFC) method able to estimate the equivalent elastic parameters of complex structures at different propagation angles is detailed in the third chapter. Contrary to the IWC method, the measured displacement field is correlated with a Green’s function-based model. This approach is more adapted to describe the field near the excitation point and offers more stability in estimating the damping loss factor compared to previous methods. Several results, with simulated and measured data, are compared with an analytical discrete laminate model and show the accuracy of this technique to recover the damping loss factor of complex structures as function of the frequency and the heading angle. In the second part of the chapter, the impact of different excitation location on the estimation of the wavenumber and the damping loss factor is investigated. A spatial angular filter to rectify the estimation of the damping loss factor is introduced. In the fourth chapter, the image source method with an objective of improving the previous GFC method in the low frequency range and for lightly damped structures is introduced. The proposed method takes into account the reflection at boundaries which is, ignored in the free field Green’s function used in the previous chapter. The performance of the method is investigated for two types of boundary conditions: simply supported and free edges. The identified parameters of the numerical simulations are compared to the previous GFC method and to the analytical discrete laminate model
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Gao, Huanhuan. "Categorical structural optimization : methods and applications." Thesis, Compiègne, 2019. http://www.theses.fr/2019COMP2471/document.
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La thèse se concentre sur une recherche méthodologique sur l'optimisation structurelle catégorielle au moyen d'un apprentissage multiple. Dans cette thèse, les variables catégorielles non ordinales sont traitées comme des variables discrètes multidimensionnelles. Afin de réduire la dimensionnalité, les nombreuses techniques d'apprentissage sont introduites pour trouver la dimensionnalité intrinsèque et mapper l'espace de conception d'origine sur un espace d'ordre réduit. Les mécanismes des techniques d'apprentissage à la fois linéaires et non linéaires sont d'abord étudiés. Ensuite, des exemples numériques sont testés pour comparer les performances de nombreuses techniques d’apprentissage. Sur la base de la représentation d'ordre réduit obtenue par Isomap, les opérateurs de mutation et de croisement évolutifs basés sur les graphes sont proposés pour traiter des problèmes d'optimisation structurelle catégoriels, notamment la conception du dôme, du cadre rigide de six étages et des structures en forme de dame. Ensuite, la méthode de recherche continue consistant à déplacer des asymptotes est exécutée et fournit une solution compétitive, mais inadmissible, en quelques rares itérations. Ensuite, lors de la deuxième étape, une stratégie de recherche discrète est proposée pour rechercher de meilleures solutions basées sur la recherche de voisins. Afin de traiter le cas dans lequel les instances de conception catégorielles sont réparties sur plusieurs variétés, nous proposons une méthode d'apprentissage des variétés k-variétés basée sur l'analyse en composantes principales pondérées<br>The thesis concentrates on a methodological research on categorical structural optimizationby means of manifold learning. The main difficulty of handling the categorical optimization problems lies in the description of the categorical variables: they are presented in a category and do not have any orders. Thus the treatment of the design space is a key issue. In this thesis, the non-ordinal categorical variables are treated as multi-dimensional discrete variables, thus the dimensionality of corresponding design space becomes high. In order to reduce the dimensionality, the manifold learning techniques are introduced to find the intrinsic dimensionality and map the original design space to a reduced-order space. The mechanisms of both linear and non-linear manifold learning techniques are firstly studied. Then numerical examples are tested to compare the performance of manifold learning techniques mentioned above. It is found that the PCA and MDS can only deal with linear or globally approximately linear cases. Isomap preserves the geodesic distances for non-linear manifold however, its time consuming is the most. LLE preserves the neighbour weights and can yield good results in a short time. KPCA works like a non-linear classifier and we proves why it cannot preserve distances or angles in some cases. Based on the reduced-order representation obtained by Isomap, the graph-based evolutionary crossover and mutation operators are proposed to deal with categorical structural optimization problems, including the design of dome, six-story rigid frame and dame-like structures. The results show that the proposed graph-based evolutionary approach constructed on the reduced-order space performs more efficiently than traditional methods including simplex approach or evolutionary approach without reduced-order space. In chapter 5, the LLE is applied to reduce the data dimensionality and a polynomial interpolation helps to construct the responding surface from lower dimensional representation to original data. Then the continuous search method of moving asymptotes is executed and yields a competitively good but inadmissible solution within only a few of iteration numbers. Then in the second stage, a discrete search strategy is proposed to find out better solutions based on a neighbour search. The ten-bar truss and dome structural design problems are tested to show the validity of the method. In the end, this method is compared to the Simulated Annealing algorithm and Covariance Matrix Adaptation Evolutionary Strategy, showing its better optimization efficiency. In chapter 6, in order to deal with the case in which the categorical design instances are distributed on several manifolds, we propose a k-manifolds learning method based on the Weighted Principal Component Analysis. And the obtained manifolds are integrated in the lower dimensional design space. Then the method introduced in chapter 4 is applied to solve the ten-bar truss, the dome and the dame-like structural design problems
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Krmaš, Jan. "Hospic sv. Michaela." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226675.
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The topic of the master thesis is new medico-social facility hospice St. Michaela. The purpose of the object is the maximizing of improvement in the quality of life of dying, severely ill and incurable patients, with the use of palliative care. The construction follows the Complex of Regional Hospital Náchod. Together with as a retirement home Náchod completes a support network of health and social care. The building is designed as a four-building storey and is partially embedded into the sloping terrain. Floors are divided into individual facilities and together constitute a functional unit. In the basement is the technical room, warehouses, garages and kitchen facilities. On the ground floor are then socio-public rooms and facilities. On the second floor is located hedmaster of hospice and accommodation area. The third floor is devoted to the accommodation area. The proposed structure made of brick longitudinal system, supplemented by concrete basement walls. The horizontal structure is made of filigree ceiling panels. Stairs are designed as a precast concrete and steel. Individual roof structures is made from unwalkable, walkable and vegetation compositions. The cladding consists of ventilated facade of glass and wooden panels. Foundations are designed from the lineal foundation.
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Gelbrich, Sandra. "Funktionsintegrative Leichtbaustrukturen für Tragwerke im Bauwesen." Doctoral thesis, Universitätsbibliothek Chemnitz, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-215103.
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In den letzten Jahren gewinnt der Leichtbau im Bauwesen im Zuge der Ressourceneinsparung wieder stärker an Bedeutung, denn ohne eine deutliche Steigerung der Effizienz ist zukunfts-fähiges Bauen und Wohnen nur schwer zu bewerkstelligen. Optimiertes Bauen, im Sinne der Errichtung und Unterhaltung von Bauwerken mit geringem Einsatz an Material, Energie und Fläche über den gesamten Lebenszyklus eines Gebäudes hinweg, bedarf des Leichtbaus in punkto Material, Struktur und Technologie. In der vorliegenden Arbeit wird ein wissenschaftlicher Überblick zum aktuellen Stand der eigenen Forschungen in Bezug auf funktionsintegrativen Leichtbau im Bauwesen gegeben sowie erweiterte Methoden und Ansätze abgeleitet, die eine Konzeption, Bemessung und Erprobung von neuartigen Hochleistungs-Tragstrukturen in Leichtbauweise gestatten. Dabei steht die Entwicklung leistungs-starker und zugleich multifunktionaler Werkstoffkombinatio-nen und belastungsgerecht dimensionierter Strukturkomponenten unter dem Aspekt der Gewichtsminimalität in Material und Konstruktion im Fokus. Ein breit gefächertes Eigen-schaftsprofil für \"maßgeschneiderte\" Leichtbauanwendungen besitzen textilverstärkte Ver-bundbauteile, denn sowohl die Fadenarchitektur als auch die Matrix können in weiten Berei-chen variiert und an die im Bauwesen vorliegenden komplexen Anforderungen angepasst werden. In der vorliegenden Arbeit werden hierzu vor allem Methoden und Lösungen anhand von Beispielen zu: multifunktionalen Faser-Kunststoff-Verbunden (FKV), funktionsintegrier-ten faserverstärkten mineralischen Tragelemente und Verbundstrukturen in textilbewehrter Beton-GFK-Hybridbauweise betrachtet. Von zentraler Bedeutung ist dabei die Schaffung von materialtechnischen, konstruktiven und technologischen Grundlagen entlang der gesamten Wertschöpfungskette – von der Leichtbauidee über Demonstrator und Referenzobjekt bis hin zur technologischen Umsetzung zur Überführung der Forschungsergebnisse in die Praxis<br>In the last few years, lightweight construction in the building sector has gained more and more importance in the course of resource saving. Without a significant increase in efficiency, future-oriented construction and resource-conserving living is difficult to achieve. Optimized building, in the sense of the erection and maintenance of buildings with little use of material, energy and surface over the entire life time cycle of a building, requires lightweight design in terms of material, structure and technology. In this thesis, a scientific overview of the current state of research on function-integrative light-weight construction in architecture is presented. Furthermore, advanced methods and research approaches were developed and applied, that allows the design, dimensioning and testing of novel high-performance supporting structures in lightweight design. The focus is on the development of high-performance, multi-functional material combinations and load-adapted structural elements, under the aspect of weight minimization in material and construction. Textile-reinforced composites have a broad range of material properties for optimized \"tailor-made\" lightweight design applications, since the thread architecture as well as the matrix can be varied within wide ranges and can adapted to the complex requirements in the building industry. Within the scope of this thesis, methods and solutions are examined in the field of: multifunc-tional fiber-reinforced plastics (FRP), function-integrated fiber-reinforced composites with mineral matrix (TRC) and textile-reinforced hybrid composites (BetoTexG: combination of TRC and FRP). In this connection the creation of material, structural and technological foundations along the entire value chain is of central importance: From the lightweight design idea to the demonstrator and reference object, to the technological implementation for the transfer of the research results into practice
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Gelbrich, Sandra. "Funktionsintegrative Leichtbaustrukturen für Tragwerke im Bauwesen." Doctoral thesis, Universitätsverlag der Technischen Universität Chemnitz, 2016. https://monarch.qucosa.de/id/qucosa%3A20605.
Full textAbstract:
In den letzten Jahren gewinnt der Leichtbau im Bauwesen im Zuge der Ressourceneinsparung wieder stärker an Bedeutung, denn ohne eine deutliche Steigerung der Effizienz ist zukunfts-fähiges Bauen und Wohnen nur schwer zu bewerkstelligen. Optimiertes Bauen, im Sinne der Errichtung und Unterhaltung von Bauwerken mit geringem Einsatz an Material, Energie und Fläche über den gesamten Lebenszyklus eines Gebäudes hinweg, bedarf des Leichtbaus in punkto Material, Struktur und Technologie.
In der vorliegenden Arbeit wird ein wissenschaftlicher Überblick zum aktuellen Stand der eigenen Forschungen in Bezug auf funktionsintegrativen Leichtbau im Bauwesen gegeben sowie erweiterte Methoden und Ansätze abgeleitet, die eine Konzeption, Bemessung und Erprobung von neuartigen Hochleistungs-Tragstrukturen in Leichtbauweise gestatten. Dabei steht die Entwicklung leistungs-starker und zugleich multifunktionaler Werkstoffkombinatio-nen und belastungsgerecht dimensionierter Strukturkomponenten unter dem Aspekt der Gewichtsminimalität in Material und Konstruktion im Fokus. Ein breit gefächertes Eigen-schaftsprofil für \"maßgeschneiderte\" Leichtbauanwendungen besitzen textilverstärkte Ver-bundbauteile, denn sowohl die Fadenarchitektur als auch die Matrix können in weiten Berei-chen variiert und an die im Bauwesen vorliegenden komplexen Anforderungen angepasst werden. In der vorliegenden Arbeit werden hierzu vor allem Methoden und Lösungen anhand von Beispielen zu: multifunktionalen Faser-Kunststoff-Verbunden (FKV), funktionsintegrier-ten faserverstärkten mineralischen Tragelemente und Verbundstrukturen in textilbewehrter Beton-GFK-Hybridbauweise betrachtet. Von zentraler Bedeutung ist dabei die Schaffung von materialtechnischen, konstruktiven und technologischen Grundlagen entlang der gesamten Wertschöpfungskette – von der Leichtbauidee über Demonstrator und Referenzobjekt bis hin zur technologischen Umsetzung zur Überführung der Forschungsergebnisse in die Praxis.<br>In the last few years, lightweight construction in the building sector has gained more and more importance in the course of resource saving. Without a significant increase in efficiency, future-oriented construction and resource-conserving living is difficult to achieve. Optimized building, in the sense of the erection and maintenance of buildings with little use of material, energy and surface over the entire life time cycle of a building, requires lightweight design in terms of material, structure and technology.
In this thesis, a scientific overview of the current state of research on function-integrative light-weight construction in architecture is presented. Furthermore, advanced methods and research approaches were developed and applied, that allows the design, dimensioning and testing of novel high-performance supporting structures in lightweight design. The focus is on the development of high-performance, multi-functional material combinations and load-adapted structural elements, under the aspect of weight minimization in material and construction. Textile-reinforced composites have a broad range of material properties for optimized \"tailor-made\" lightweight design applications, since the thread architecture as well as the matrix can be varied within wide ranges and can adapted to the complex requirements in the building industry.
Within the scope of this thesis, methods and solutions are examined in the field of: multifunc-tional fiber-reinforced plastics (FRP), function-integrated fiber-reinforced composites with mineral matrix (TRC) and textile-reinforced hybrid composites (BetoTexG: combination of TRC and FRP). In this connection the creation of material, structural and technological foundations along the entire value chain is of central importance: From the lightweight design idea to the demonstrator and reference object, to the technological implementation for the transfer of the research results into practice.
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Cai, Yinfei. "Simulation des affaissements miniers et de leurs conséquences sur le bâti." Thesis, Université de Lorraine, 2015. http://www.theses.fr/2015LORR0010/document.
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L’objectif de cette thèse est, d’une part, de proposer une amélioration des méthodes d’estimation des cuvettes d’affaissement et des méthodes d’évaluation des dommages susceptibles de se produire sous leurs effets et de l’autre, de développer des outils basés sur ces méthodes pour étudier les affaissements et les dommages sur des cas pratiques. L’étude de l'influence de la topographie sur les cuvettes d'affaissement dans des conditions d’exploitation simplifiées grâce à des modèles numériques avec des profondeurs d'exploitation et des pentes du sol variables a permis de proposer une nouvelle fonction d’influence basée sur une densité de probabilité normale asymétrique lorsque la surface du sol est non-plane. Une modélisation simplifiée des habitations en maçonnerie sous la forme de deux modèles de structures bidimensionnels croisés, alignés avec les axes d’inertie de la structure étudiée et dans lesquels la méthode des déplacements est mise en œuvre pour calculer les efforts internes et les déformations sous l’effet de déplacements imposées des fondations. Ces modèles simplifiés dont les caractéristiques géométriques et mécaniques sont définis pour chaque type de bâtiment étudié permettent d’estimer les efforts appliqués à chaque bâtiment d’une ville exposée à un affaissement de terrain et de fournir de nouveaux critères d’évaluation des dommages prenant en compte davantage d’informations que les méthodes habituelles. Une estimation des dommages dans la ville de Joeuf sur la base des nouvelles méthodes proposées, tant pour le calcul de l’affaissement que pour l’estimation des dommages, a été réalisée<br>The objective of this thesis is to improve the methods of subsidence computation and building damage evaluation, and to develop some tools based on these methods to study the mining subsidence and building damage cases in Lorraine. By investigating the topography influence on subsidence under simplified mining conditions, and using numerical models with varying mining depths and ground surface angles, a new influence function method, which is based on a probability density function of a skew normal distribution, to simulate the element subsidence, was firstly developed and can be used to compute the mining subsidence caused by the excavation under non-flat surface. Then, plane framed structural models were chosen to study the mechanical behavior of 3D buildings. For each building, two plane models located in the vertical sections passing through the principle inertia axes of the building’s projective polygon were considered. Their geometry and mechanical characteristics were chosen according to the construction type and used materials of the building under consideration. Then, by using the matrix displacement method with some modifications, the internal forces and displacements for the entire structure could be computed. The achieved internal forces could then be compared to damage grade criteria to determine the extent of building damage.Finally, by using the improved methods of subsidence computation and building damage evaluation, a real case application was performed in Joeuf city (France). The subsidence was computed and applied to the defined structural models as support displacements, and then the damage extents of the buildings in Joeuf were predicted
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Veselá, Jana. "Městský dům - architektura kombinace funkcí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-225864.
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The territory lies in the City of Brno, in the urban district of Zábrdovice. From the east it is demarcated by the Svitava River, from the south by the Cejl Street, and from the west by the Jan Svoboda Street. Its area is approximately 18,790 m2. From the standpoint of urban planning¸ the intensive house is a separate city block, which is, nevertheless, open in the eastern direction towards the Svitava River, thus communicating with the embankment. In the other direction there is both private and semi-private space inside the block as a relaxation green “garden” in several levels. The mass of the object links up in the prolonged line with the existing neighbouring blocks and thus respects the integrity of the territory. Intensive use of the territory consists in the achievement of high density of built-up area, and at the same time preserving the surroundings of quality for life and habitation. Functions are mixed here and a city of short distances is created here with nearly excluded traffic. In order to achieve such intensity, space urbanism is employed. The principle consists in a simple linear form of masses respecting the shape of the lot, which is vivified with an ellipsoid located in the courtyard, which is an accent towards the linear form. The ellipsoid serves as a small cultural and exhibition centre, at the same time connecting all the arms of the defining block and bringing daylight to the first floor. The block is open in the direction to the river and its half-public space is connected with the embankment with a staircase and verdure. Verdure is also made use of on the roofs. The defining mass is perforated, thus creating covered terraces. The principal architectonic intention was to create an integrated structure, where a significant role is played by the introduction of nature and polyfunctionality to the whole territory, thus increasing its attractivity. From the dispositional perspective the individual functions interpenetrate at al
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Liao, Min-Hung, and 廖敏宏. "Constructing Structural Model of Protein Functional Domains using ab initio Structure Prediction." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/20715227811664794191.
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碩士<br>國立臺灣大學<br>生物產業機電工程學研究所<br>96<br>The basic units of all kinds of organisms are proteins. In order to learn more about the protein function, scientists try to understand proteins from different points of view, including protein sequence, protein structure, location of functional residues, and so forth. In the fields of computational biology, the prediction of protein structure has always been the core issue that researchers indefatigably focus on. It has never been easy to tell the protein structure merely through protein sequence; hence methods for predicting the structures are being developed one after another, including approaches based on homology modeling, fold recognition, and ab initio. The issue of determining protein structure is equivalent to the identification of protein folding. Protein structure can be derived from experimental methods such as X-ray crystallography and NMR spectroscopy. Although the accuracy of the experimental methods is higher, their cost is relatively higher and more time consuming as well; researchers therefore come up with the idea of employing theoretical simulation to predict protein structure. The results of computational approaches may not be as precise as that of experimental methods, but some of them are fairly acceptable. For example, the accuracy of secondary structure prediction is about 80%, which provides valuable clues for biologists. This dissertation focuses mainly on how to determine the structure model of a protein functional domain. In the process of biological evolution, important regions are usually conserved. Our method is based on the information derived from three predictors, including the prediction of conserved residues, ordered regions, and domain boundaries. These characteristics of protein sequences are used as the basis for selecting initial functional regions for structure prediction. Furthermore, a structure comparison program is incorporated to evaluate the quality of the estimated region boundary, in order to increase the accuracy of the structure prediction. Results conducted in this thesis show that the proposed method is effectively in identifying the functional regions and delivering satisfied structure model for the proteins of interest.
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CHENG, KAI-CHUNG, and 鄭凱中. "Navisworks Space Inspection Function Applied in Bolt Construction of Steel Structure." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/ex9353.
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碩士<br>國立高雄應用科技大學<br>土木工程與防災科技研究所<br>105<br>Tekla Structures is commonly used professional software for 3D steel structure graphics. It provides visualized graphics and collision checking of steel components. However, it could not check the operating space of bolt construction at site. Currently, the bolt construction operating space inspection is done manually by cross-comparison between 2D drawings and AutoCAD files. This approach is time-consuming and easy to overlook. Building Information Model (BIM) concept and related technologies grow mature and are applied in engineering construction in recent years. Navisworks software, one of the BIM application software, is used in multiple data management, communication coordination and clash detection of building model. This study tried to verify the feasibility of bolt operating space check by using clash detective function provided in Navisworks software. Five bolt connection types were studied, which are vertical bracing, inclined horizontal bracing, oblique joint of steel beam and column, oblique joint of beam and beam connection and steel beam vertical joint with steel plate. Three dimensional model information of each type, which builded by Tekla Structures, was transformed to IFC format file. Import the IFC format file into Navisworks software, define set of elements and direction, execute clash detective function, then the output of insufficient bolt operating space positions is produced. Research results show that three bolt joint types can be checked except steel beam and steel beam oblique joint and steel column and steel beam oblique joint. There are some measurement errors in both above types since the program measure the perpendicular distance between two element set, which is inclined to bolt operating space, Through 5 types joint program detection, this study verify and provide the approach in checking blot operating space by using clash detective function of Navisworks software.
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Chang, Co-Chih, and 張恪誌. "Construction of C-terminal Truncated Human Dual-Specificity Phosphatase 22 for Structural and Functional Studies." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/bpp2ds.
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Günzl, Karen [Verfasser]. "The fine structure of translation functors, the triangle function and a construction of R-matrices / Karen Günzl." 2000. http://d-nb.info/96112024X/34.
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YANG, SHAO-KANGF, and 楊少康. "Construction of multi heart structure four-dimensional dynamic simulation tool for assessment of left ventricular and left atrium motion function." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/73250368854323389536.
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碩士<br>中原大學<br>生物醫學工程研究所<br>100<br>The aim of this study is to build a software tool for cardiac analysis using noninvasive 4D CT cardio-images. The tool will be used for anatomic heart chamber structure segmentation and quantization of cardiac function. This System has three new features added to previous studies. Firstly, through image processing, the tool could remove motion artifact from the shadow image caused by the motion of chordate tendineae and papillary muscle in the ventricle. It could be smoothing the contour of border through area extrapolation methodology and will be reconstructing a good visualization of cardiac model.
Secondly, it can segment both endocardial and epicardial border in two processes. One could identify the endocardial contour of cavity with seeded region growth. And, the other, one could make the endocardial contour as an introduction contour to delineate epicardial contour. After all part of delineation had been accomplished, the contour of epicardial and endocardial could be described and the volume of chamber or the volume of cavity was calculated. Therefore, the volume of myocardium could be calculated by ventricular cavity’s volume subtracted from whole epicardial volume.
Thirdly, the developed tool can display the motion of left atria and left ventricle simultaneously. In the display window endocardial border will been evinced red model and epicardial order will been evinced green. Simulated left ventricle will been evinced green yellow model. User can overlap those models for details observation. The display window could also show Bull's-eye diagram in synchronous with the beating heart model. It could help understand the wall motion of heart chamber. Thus, the global function of heart could be illustrated and comprehended more easily.
With this analysis system, user can measure several functional parameters from the reconstructed heart model using computed tomography images. The parameters that could be used at post analysis included volume of chamber cavity, volume of chamber myocardium and chamber's 3D model in different time sequence. In this study, we have measured functional parameters in three patients with atrial fibrillation. The results showed that the volume change of left atrial myocardium within the cardiac cycle is very tiny. From our evaluation of C.T. Time series data, the average value of each variation is only 1.494 ± 0.379 cm3 and whole cycle change (max. - min.) is only in 5.094 ± 1.631 cm3. We also confirmed this by only from visual image view. this demonstrated that the segmentation processes in the developed tool was credible.
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Henadeerage, Kumara. "Topics in Sinhala Syntax." Phd thesis, 2002. http://hdl.handle.net/1885/47148.
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This study is a detailed investigation of a number of issues in colloquial Sinhala morphosyntax. These issues primarily concern grammatical relations, argument structure, phrase structure and focus constructions. The theoretical framework of this study is Lexical Functional Grammar.¶ ...
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JENG, BAI-CHENG, and 鄭百成. "Studies on constructing of Ideal Multiple-Choice Test Items and Their Polytomous Ordering Structure: Using the Differentiations of the Sum of Functions as an Example." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/243q6m.
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博士<br>國立臺中教育大學<br>教育資訊與測驗統計研究所<br>104<br>Abstract
In a traditional multiple-choice test, experts usually design some distractor options which are truly wrong to increase the discrimination. The concepts of the distractor options are partly right to attract examinees to choose. Therefore, it’s not fair that examinees choosing distractor options get the same zero as those choosing totally-wrong options.
First, the research takes the differential of the addition function as an example to make up the ideal transitive questions based on Pre-test Q-matrix Theory. According to the answers of the ideal questions and with Liu Hsiang-Chuan’s relative theses of Polytomous Item Ordering Structure Theory, the research raises that according to the correlation of every distractor option to the grades, the weighted-scoring is given. Thus, all examinees get the weighted-scores and the research has polytomous item ordering correlation diagrams.
Polytomous item ordering of ideal questions is a good criterion, and the index of Liu Hsiang-Chuan’s Criterion-related Validity Theory is a good comparing tool. Therefore, the research compares the Airasian & Bart’s and Liu’s polytomous item ordering structure of the ideal questions according to Liu’s Criterion-related Validity Theory. The research finds that Liu’s polytomous item ordering structure theory can get better with filtering the noise.
The research designs a diagnostic test, different from an achievement test with large content. The questions in an achievement test are may independent, but the questions in a diagnostic test with small content are a little related and not independent. The question order of a diagnostic test should has not only conceptive content logic relations but also conceptive involving relations.
Liu Hsiang-Chuan points out that the items of a diagnostic test often have the order structure. Before designing the test, Pre-test Q Matrix has to be applied to make up the insufficiency of Two-Way specification table. The items have to put an emphasis on level and structure. Then the structure of the items can get close to the conceptive structure and the diagnosis is true. Therefore Liu points that both the conceptive structure and the questions structure are so transitive that it’s an ideal situation. However, there are more interference and not ideal estimate model and non-transitive model speculates transitive conceptive structure and the questions structure. So the validity is doubtful. As a result, the research proposes that designing the ideal questions, comparing with Liu’s Criterion-related Validity Theory and filtering the noise can improve polytomous item ordering structure theory. The research gives a great contribution to the researchers of polytomous scoring in the future.