Dissertations / Theses on the topic 'Machine Foundation'
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Liu, Dilectiss Di Sheng [Verfasser]. "Machine Philosophy - A Foundation of Philosophical Methodology / Dilectiss Di Sheng Liu." Tübingen : Universitätsbibliothek Tübingen, 2021. http://nbn-resolving.de/urn:nbn:de:bsz:21-dspace-1184779.
Full textHammond, Alisha M. "Establishing a quantitative foundation for exactly constrained design /." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd326.pdf.
Full textNeto, Edgard Sant'Anna de Almeida. "Introdução a analise dinâmica de fundações de máquinas." Universidade de São Paulo, 1989. http://www.teses.usp.br/teses/disponiveis/3/3144/tde-08122003-082155/.
Full textThis paper presents concepts and procedures necessary to the dynamic analysis of machine foundations. Analytical approaches available to the designer, and factors which influence the choice and development of a suitable analytical model are discussed. Three different foundations (block foundations, hammer foundations and framed foundations) are examined and examples are given to demonstrate the effectiveness of simple modeling techniques.
Macejka, Andrej. "Stacionární drtič železobetonových panelů - analýza dynamických účinků do základů stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-416604.
Full textMachado, Vinicius Ponte. "Uma arquitetura baseada em agentes para configura??o din?mica de aplica??es inteligentes em ambiente foundation fieldbus." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15136.
Full textCoordena??o de Aperfei?oamento de Pessoal de N?vel Superior
The industrial automation is directly linked to the development of information tecnology. Better hardware solutions, as well as improvements in software development methodologies make possible the rapid growth of the productive process control. In this thesis, we propose an architecture that will allow the joining of two technologies in hardware (industrial network) and software field (multiagent systems). The objective of this proposal is to join those technologies in a multiagent architecture to allow control strategies implementations in to field devices. With this, we intend develop an agents architecture to detect and solve problems which may occur in the industrial network environment. Our work ally machine learning with industrial context, become proposed multiagent architecture adaptable to unfamiliar or unexpected production environment. We used neural networks and presented an allocation strategies of these networks in industrial network field devices. With this we intend to improve decision support at plant level and allow operations human intervention independent
A automa??o industrial est? diretamente ligada ao crescimento da tecnologia da informa??o. Tanto as melhorias em solu??es de hardware quanto o aprimoramento em metodologias de desenvolvimento de software propiciaram o crescimento do controle do processo produtivo ao longo dos anos. Nesta tese, propomos uma arquitetura que permitir? a uni?o de duas tecnologias no ?mbito de hardware (redes industriais) e software (sistemas multiagente). O objetivo de nossa proposta ? unir essas tecnologias em uma arquitetura multiagente para permitir implementa??o de aplica??es inteligentes nos dispositivos de campo. Com isso pretendemos fazer que os agentes possam detectar e apontar solu??es para problemas encontrados no ambiente de rede industrial. Este trabalho ainda alia a aprendizagem de m?quina ao contexto industrial, permitindo dessa forma que a arquitetura de agentes proposta possa se tornar adapt?vel a um contexto de produ??o desconhecido ou inesperado. Para isso, utilizamos redes neurais e mostramos uma estrat?gia para aloca??o destas redes em dispositivos da rede industrial. Pretendemos assim viabilizar uma melhoria no suporte a decis?o em ocorr?ncias no n?vel de planta auxiliando os operadores na detec??o e corre??o de problemas e falhas
Eriksson, Jakob, and Patrik Nilsson. "Effektivisering av informationsflöde vid betongpålning." Thesis, Luleå tekniska universitet, Geoteknologi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-61663.
Full textProductivity in the construction industry has for a long time been considered as low compared to other industries. The construction industry has started to adapt strategies that have been successful in other industries to increase the productivity. This report aims to examine how the information flow during foundation of concrete piles can be more efficient. The study is based on Skanska Sweden AB for the region of Skanska foundation. Concrete piling is one of the foundation activities that Skanska foundation performs. To create an understanding about the information flow, the authors had to identify the existing working method that was used today. The aim was then based on the current state to formulate a future state with a greater efficiency in the flow of information. BIM has begun to be implemented as a working method in the construction sector and have therefore been investigated in the report as an opportunity for an improved flow of information. To identify the production process for concrete piling within the company the authors have used value stream mapping. The method is a way of mapping a specific process, where the product that the customer wants is followed. The analysis originating from Toyotas method which today is referred to as lean. The mapping of concrete piling started from the transport of the factory to the pile was handed over to the customer. During the mapping the authors follows the material flow and the information flow related to the material during the process. The collection of data for the value stream mapping was done based on interviews and observations. To understand the possibility of implementations carried out a questionnaire and interviews, regarding the use of BIM in Skanska foundation. The use of BIM within the organization differs between the different professional groups, civil servants and skilled workers. The questionnaire survey was conducted on five projects in the Stockholm area. Among civil servants eight of 19 worked with BIM weekly or more often, while 16 of 17 skilled workers never had worked with BIM at all. The results of value stream analysis were collected from the two projects, the FSE 105 Concrete tunnel at Kungens kurva and interchange Vega. Based on the results the authors have formulated two areas of improvements. The first improvement is about release measuring through machine control and the second are about digitization of documents. Implementation of machine control on a pile driver does not need a long time to pay off financially. From the results, about 170,000 SEK can be saved per year and machine if machine control would be implemented on the pile drivers. There are more positive effects that have been observed during the study but these effects have not been measured. However, there are obstacles in the usability and technology today that require manual intervention at certain stages. For the development of BIM among the employees there are great gains through simplified information flow. With that there comes difficulties since a large proportion of employees is hindered by technology.
Bhat, Sooraj. "Syntactic foundations for machine learning." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/47700.
Full textBu, Suhol. "Dynamic boundary element analysis of machine foundations." Thesis, University of Glasgow, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295386.
Full textCosta, Guilherme Alan Souza. "Análise vibratória de fundações de máquinas sobre estacas." Universidade do Estado do Rio de Janeiro, 2013. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7853.
Full textA análise de fundações sob solicitações dinâmicas é algo sempre presente em projetos na área industrial. É um campo pouco explorado na área de engenharia geotécnica, onde existem relativamente poucas informações no Brasil, de maneira geral. O método mais comum de realizar essas análises é a simplificação de modelos estruturais a partir do uso de molas. Sabe-se que esses coeficientes de reação têm uma variação relativamente grande e que esse enfoque de projeto pode, em alguns casos, mostrar-se contra a segurança ou levar a superdimensionamentos desnecessários. Verifica-se, então, a necessidade de uma avaliação mais criteriosa, utilizando a interação solo x estrutura, onde as molas comumente utilizadas nas análises vibratórias convencionais são substituídas pela rigidez real do solo quando concebido como um meio contínuo, através de sua discretização pelo método dos elementos finitos. A presente dissertação analisa o problema através do módulo de dinâmica do programa Plaxis 2D. Neste tipo de análise, além da modelagem do solo como um meio contínuo, torna-se possível introduzir condições de contorno específicas ao problema em estudo, múltiplas camadas de solo, sejam horizontais ou inclinadas, além da introdução de amortecedores capazes de evitar a reflexão espúria das ondas incidentes nos limites da malha de elementos finitos e assim modelar mais adequadamente a perda de energia por radiação. A presente dissertação compara medições experimentais e soluções eficientes de métodos vibratórios clássicos com a resposta obtida pelo MEF, mostrando resultados bastante satisfatórios tanto pelos métodos clássicos quanto pelo MEF.
The foundation analysis by dynamic solicitations is always present in industrial projects. It is an area which is poorly explored in geotechnical engineering and there are few information about this subject in Brazil, in general. The most common method to realize this analysis consists in simplifies structural models by using springs. It is known that these reaction coefficients have a large range of variation and this projects focus can, in some cases, be against the safety side or lead to unnecessary over designs. This proves the necessity to do a more criterious evaluation by using the interaction soil x structure where the springs usually used in common vibration analysis are replaced by the real stiffness of soil when designed as a continuous medium through its discretization by finite element method. This present dissertation analyzes the problem through the dynamic modulus of the software PLAXIS 2D. In this sort of analysis, besides the modeling of soil as a continuous medium, it becomes possible to introduce specific boundary conditions associated to the studied problem, multiple soil layer, that can be horizontals or inclined, in addition to the introduction of dampers able to avoid the spurious reflection of incident waves on the boundary of finite element mesh and then to model more efficiently the energy loss by radiation. This present dissertation compares experimental measurements and efficient solutions of classical vibration methods with the response obtained by FEM, showing results quite satisfactory both by classical methods and by FEM.
Mbawala, Silipius Joseph. "Behaviour of machine foundations subjected to vertical dynamic loading." Thesis, University of Pretoria, 2015. http://hdl.handle.net/2263/56087.
Full textThesis (PhD)--University of Pretoria, 2015.
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Civil Engineering
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Templin, Carl S. "Dismantling the War Machine: The Existential Foundations of Peace." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1289962133.
Full textHolley, Julian. "Oneiric Machine Learning : The Foundations of Dream Inspired Adaptive Systems." Thesis, University of the West of England, Bristol, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.495516.
Full textMyers, Alan. "The effect of concrete foundations and machine thermal conditions on the accuracy of large machine tools." Thesis, University of Huddersfield, 2017. http://eprints.hud.ac.uk/id/eprint/34454/.
Full textTratch, Jorge. "Vibration transmission through machinery foundation and ship bottom structure." Thesis, Massachusetts Institute of Technology, 1985. http://hdl.handle.net/1721.1/15216.
Full textMICROFICHE COPY AVAILABLE IN ARCHIVES AND ENGINEERING.
Includes bibliographical references.
by Jorge Tratch Junior.
Mech.E
Vančura, Tomáš. "Nástroje pro automatizaci workflow procesů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217485.
Full textŠifrová, Sláva. "Stavebno technologický projekt bytových domov Zdravie v Hornom Smokovci." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240490.
Full textCarpentier, Justin. "Computational foundations of anthropomorphic locomotion." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30376/document.
Full textAnthropomorphic locomotion is a complex process that involves a very large number of degrees of freedom, the human body having more than three hundred joints against thirty in humanoid robots. Taken as a whole, these degrees of freedom show a certain coherence making it possible to set the anthropomorphic system in motion and maintain its equilibrium, in order to avoid falling. This thesis highlights the computational foundations behind this orchestration. It introduces a unified mathematical framework allowing both the study of human locomotion and the generation of locomotive trajectories for humanoid robots. This framework consists of a reduction of the body-complete dynamics of the system to consider only its projection around the center of gravity, also called centroid dynamics. Although reduced, we show that this centroidal dynamics plays a central role in the understanding and formation of locomotive movements. To do this, we first establish the observability conditions of this dynamic, that is to say that we show to what extent this data can be apprehended from sensors commonly used in biomechanics and robotics. Based on these observability conditions, we propose an estimator able to reconstruct the unbiased position of the center of gravity. From this estimator and the acquisition of walking motions on various subjects, we highlight the presence of a cycloidal pattern of the center of gravity in the sagittal plane when the human is walking nominally, that is, to say without thinking. The presence of this motif suggests the existence of a motor synergy hitherto unknown, supporting the theory of a general coordination of movements during locomotion. The last contribution of this thesis is on multi-contact locomotion. Humans have remarkable agility to perform locomotive movements that require joint use of the arms and legs, such as when climbing a rock wall. How to equip humanoid robots with such capabilities? The difficulty is certainly not technological, since current robots are able to develop sufficient mechanical powers. Their performances, evaluated both in terms of quality of movement and computing time, remain very limited. In this thesis, we address the problem of generating multi-contact trajectories in the form of an optimal control problem. The interest of this formulation is to start from the reduced model of centroid dynamics while responding to equilibrium constraints. The original idea is to maximize the likelihood of this reduced dynamic with respect to body-complete dynamics. It is based on learning a measurement of occupation that reflects the kinematic and dynamic capabilities of the robot. It is effective: the resulting algorithmic is compatible with real-time applications. The approach has been successfully evaluated on the humanoid robot HRP-2, on several modes of locomotion, thus demonstrating its versatility
Bel, Justin. "Modélisation physique de l’impact du creusement d’un tunnel par tunnelier à front pressurisé sur des fondations profondes." Thesis, Lyon, 2018. http://www.theses.fr/2018LYSET002/document.
Full textThe major goal presented in this thesis was to analyze and investigate the mechanisms, which are involved in the impact of the tunnels excavated thanks to an Earth Pressure Balanced Shield on nearby deep foundations. This thesis was realized in European project NeTTUN and the work had been done in the Laboratory of Tribology and Systems Dynamics (LTDS) of ENTPE. During these works, phenomenological approach was based on two important experimental campaigns carried out using a unique device at the international level of a 1g scale model of earth-pressure tunnel boring machine (scale of the order of 1 / 10). The state of the art of this device was to be able to simulate in possibly realistic way the main stages of the three-dimensional process of mechanized excavation of a tunnel. In the framework of this thesis, the existing model tunneling machine device was initially reconfigured in order to reach the expectations of the experimental program envisaged. Physical models of deep foundations (piles and groups of piles) and protective barriers were designed under the similitude laws, manufactured and instrumented. The two large-scale experimental campaigns have been carried out in a dry sand massif. The first one concerned the effects of the passage of a pressurized tunnel boring machine on nearby deep foundations (piles, group of piles), whereas another one dealed with the effectiveness of mitigation procedure (diaphragm walls) used to limit these effects. Different parameters that influenced on the tunneling: soil - foundation interaction considered as the relative tunnel / foundation distance, the frontal face pressure applied by the TBM in the field or the height of the protective barriers. The phenomenological analysis carried out at the scale of the model concerned in particular the evolution of the fields of stresses and displacements in the ground around the tunnel boring machine, relatives pile / soil and wall / soil displacements and the redistribution of stresses along the pile foundations. The large database and analysis constituted was used for the validation of numerical modeling tools developed by the University of Rome within the NeTTUN project
Cherti, Mehdi. "Deep generative neural networks for novelty generation : a foundational framework, metrics and experiments." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS029/document.
Full textIn recent years, significant advances made in deep neural networks enabled the creation of groundbreaking technologies such as self-driving cars and voice-enabled personal assistants. Almost all successes of deep neural networks are about prediction, whereas the initial breakthroughs came from generative models. Today, although we have very powerful deep generative modeling techniques, these techniques are essentially being used for prediction or for generating known objects (i.e., good quality images of known classes): any generated object that is a priori unknown is considered as a failure mode (Salimans et al., 2016) or as spurious (Bengio et al., 2013b). In other words, when prediction seems to be the only possible objective, novelty is seen as an error that researchers have been trying hard to eliminate. This thesis defends the point of view that, instead of trying to eliminate these novelties, we should study them and the generative potential of deep nets to create useful novelty, especially given the economic and societal importance of creating new objects in contemporary societies. The thesis sets out to study novelty generation in relationship with data-driven knowledge models produced by deep generative neural networks. Our first key contribution is the clarification of the importance of representations and their impact on the kind of novelties that can be generated: a key consequence is that a creative agent might need to rerepresent known objects to access various kinds of novelty. We then demonstrate that traditional objective functions of statistical learning theory, such as maximum likelihood, are not necessarily the best theoretical framework for studying novelty generation. We propose several other alternatives at the conceptual level. A second key result is the confirmation that current models, with traditional objective functions, can indeed generate unknown objects. This also shows that even though objectives like maximum likelihood are designed to eliminate novelty, practical implementations do generate novelty. Through a series of experiments, we study the behavior of these models and the novelty they generate. In particular, we propose a new task setup and metrics for selecting good generative models. Finally, the thesis concludes with a series of experiments clarifying the characteristics of models that can exhibit novelty. Experiments show that sparsity, noise level, and restricting the capacity of the net eliminates novelty and that models that are better at recognizing novelty are also good at generating novelty
Kocagul, Volkan. "The Theory Of Capitalism And Its Ontological Foundations: A Comparative Study Of Marx And Deleuze&." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607824/index.pdf.
Full textGuattari. In his monumental book called Capital, Karl Marx develops an account of capitalism based on his understanding of philosophy of which takes its roots from Hegel and Feuerbach. Additionally, English political economy and French socialism serve as reliable grounds for Marx&
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s analysis. In light of the writings of these historical precursors, Marx constitutes a profound critique of capitalist mode of production. On the other hand, Deleuze and Guattari, as the representatives of contemporary French philosophy, develop a different account of capitalism in their influential book called Anti-Oedipus. By relying upon Nietzsche, in Anti-Oedipus, Deleuze and Guattari examine capitalism in a non-dialectical manner. Despite the fact that they reject the major aspects of Marxian mode of thinking, they concentrate on the similar questions shared by Marx. The question of capitalism and its conception as an immanent system which reproduces itself by means of capital appears as the common problem that directs them to think analogously. In this respect, this thesis is an attempt to discover the points of ruptures and the points of continuities in two different account of capitalism.
Ubinha, Jose Alexandre. "Estudo de metodo de identificação dos parametros de desbalanceamento e de fundação de maquinas rotativas." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263789.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
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Resumo: A identificação de um modelo preciso de fundação flexível e dos parâmetros de desbalanceamento (amplitude e fase) de um sistema girante, através das medições de vibração da máquina, tem sido alvo de constantes pesquisas e desenvolvimento ao longo das últimas décadas. A utilização de programas computacionais, cujos recursos de processamento e visualização de dados são periodicamente atualizados, proporcionou um grande avanço na área de análise de vibrações em máquinas rotativas. Neste contexto, o presente trabalho tem como objetivo a implementação e aplicação de um método híbrido numérico - experimental de determinação dos parâmetros de desbalanceamento e de fundação, que utiliza a resposta ao desbalanço medida durante a partida ou parada da máquina e um modelo numérico preciso do sistema girante. O trabalho apresenta o desenvolvimento teórico da metodologia estudada e discute os aspectos computacionais da implementação numérica do mesmo. O desempenho do procedimento de identificação é verificado numericamente através da simulação de diversos sistemas rotativos e a influência dos diversos fatores que interferem na precisão dos resultados é discutida criteriosamente. Na maioria dos casos, a metodologia apresentou resultados muito bons e verificou-se que a experiência do analista na utilização do método é importante para a obtenção de resultados confiáveis
Abstract: The identification of an accurate model of a flexible foundation and unbalance parameters (amplitude and phase) for a rotating system, through the measurement of the vibration amplitude of the machine, has been subject of frequent researches and development along the last decades. The use of computational software, in which processing resources and data visualization are periodically updated, provided a great progress in the area of vibration analysis in rotating machines. In this context, the present work aims the implementation and application of a hybrid numerical and experimental identification method for the unbalance parameters and the foundation model, through the measurement of the unbalance response during start-up or run-down of the machine and an accurate numerical model of the rotating system This work presents the theoretical development of the this methodology and discusses the computational aspects of the numerical implementation. The performance of the identification procedure is numerically verified through the simulation of several rotating systems and the intluence of many conditions that can affect the accuracy of the method is discussed in detail. In the major part of the cases, the methodology presented very good results and it was observed that the analyst experience in the utilization of method is very important for the achievement of reliable results
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
Kohout, Jiří. "Příprava a organizace výstavby bytových domů Rozhledna v Chrudimi." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372301.
Full textKřivohlávková, Lucie. "Příprava realizace bytového domu v Lanškrouně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-391946.
Full textMilici, Pietro. "A quest for exactness : machines, algebra and geometry for tractional constructions of differential equations." Thesis, Paris 1, 2015. http://www.theses.fr/2015PA010675.
Full textIn La Géométrie, Descartes proposed a “balance” between geometric constructions and symbolic manipulation with the introduction of suitable ideal machines. In particular, Cartesian tools were polynomial algebra (analysis) and a class of diagrammatic constructions (synthesis). This setting provided a classification of curves, according to which only the algebraic ones were considered “purely geometrical.” This limit was overcome with a general method by Newton and Leibniz introducing the infinity in the analytical part, whereas the synthetic perspective gradually lost importance with respect to the analytical one—geometry became a mean of visualization, no longer of construction. Descartes’s foundational approach (analysis without infinitary objects and synthesis with diagrammatic constructions) has, however, been extended beyond algebraic limits, albeit in two different periods. In the late 17th century, the synthetic aspect was extended by “tractional motion” (construction of transcendental curves with idealized machines). In the first half of the 20th century, the analytical part was extended by “differential algebra,” now a branch of computer algebra. This thesis seeks to prove that it is possible to obtain a new balance between these synthetic and analytical extensions of Cartesian tools for a class of transcendental problems. In other words, there is a possibility of a new convergence of machines, algebra, and geometry that gives scope for a foundation of (a part of) infinitesimal calculus without the conceptual need of infinity. The peculiarity of this work lies in the attention to the constructive role of geometry as idealization of machines for foundational purposes. This approach, after the “de-geometrization” of mathematics, is far removed from the mainstream discussions of mathematics, especially regarding foundations. However, though forgotten these days, the problem of defining appropriate canons of construction was very important in the early modern era, and had a lot of influence on the definition of mathematical objects and methods. According to the definition of Bos [2001], these are “exactness problems” for geometry. Such problems about exactness involve philosophical and psychological interpretations, which is why they are usually considered external to mathematics. However, even though lacking any final answer, I propose in conclusion a very primitive algorithmic approach to such problems, which I hope to explore further in future research. From a cognitive perspective, this approach to calculus does not require infinity and, thanks to idealized machines, can be set with suitable “grounding metaphors” (according to the terminology of Lakoff and Núñez [2000]). This concreteness can have useful fallouts for math education, thanks to the use of both physical and digital artifacts (this part will be treated only marginally)
Ne La Géométrie del 1637 Descartes ha proposto un “equilibrio” tra costruzioni geometriche e manipolazioni simboliche con l’introduzione di opportune macchine ideali. In particolare gli strumenti di Descartes erano l’algebra polinomiale (analisi) e una classe di costruzioni diagrammatiche (sintesi). Questa impostazione implica una classificazione delle curve, secondo cui solo quelle algebriche possono essere considerate “puramente geometriche”. Questo limite è stato superato con un metodo generale da Newton e Leibniz introducendo l’infinito nella parte analitica, mentre la prospettiva sintetica ha gradualmente sempre più perso importanza rispetto a quella analitica (la geometria diventa un mezzo di visualizzazione e non più di costruzione). L’approccio fondazionale di Descartes (analisi con oggetti finiti e sintesi con costruzioni diagrammatiche) è stato comunque esteso oltre i limiti delle curve algebriche, anche se in due periodi distinti. Nel tardo XVII secolo la parte sintetica è stata estesa con il “movimento trazionale” (costruzione di curve trascendenti con macchine idealizzate), e nella prima metà del XX secolo la parte analitica è stata estesa con la “algebra differenziale” (oggigiorno considerata una branca dell’algebra computazionale). L’obiettivo di questa tesi è di provare come sia possibile ottenere un nuovo equilibrio tra queste estensioni (sintentica e analitica) degli strumenti Cartesiani, un equilibrio che superi il limite delle curve algebriche e permetta di trattare una classe di problemi trascendenti. In altre parole, l’obiettivo è di evidenziare come sia possibile una nuova convergenza di macchine, algebra e geometria che permetta una fondazione di (parte della) analisi infinitesimale senza il bisogno concettuale dell’infinito. La caratteristica di questo lavoro è l’attenzione al ruolo costruttivo della geometria (come idealizzazione del comportamento di opportune macchine) per fini fondazionali. Questo approccio, dopo la “de-geometrizzazione” della matematica, è molto distante dal filone principale delle discussioni sulla matematica, specie dal punto di vista fondazionale. Comunque, anche se oggigiorno caduto in oblio, il problema di definire degli appropriati canoni di costruzioni era molto sentito nel periodo della prima età moderna, ed ha avuto profonde influenze sul modo in cui sono stati definiti gli oggetti e i metodi matematici dell’epoca. Secondo la definizione di Bos [2001], questi sono i “problemi di esattezza” per la geometria. Questi problemi di esattezza riguardano interpretazioni filosofiche e psicologiche, pertanto sono solitamente considerati esterni alla matematica. Comunque, anche se senza una risposta esaustiva, nelle conclusioni propongo un approccio algoritmico (molto primitivo) per inquadrare tali problemi, che spero di approfondire in lavori futuri
Costa, Antonio Carlos da Rocha. "Inteligência de máquina : esboço de uma abordagem construtivista." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 1993. http://hdl.handle.net/10183/17733.
Full textThis work introduces a definition for the notion of machine intelligence, establishes the concrete possibility of that definition and gives indications on its necessity - that is, it gives that notion an objective content and shows the interest and utility that the definition may have to computer science, in general, and artificial intelligence, in particular. Specifically, we take a particular reading of the definition of intelligence given by J. Piaget, and we establish the conditions under which that definition can be interpreted in the domain of machines. To achieve this, a revision of the fundamental notions of computer science was necessary, in order to make explicit the dynamical aspects of variability, controlability and adaptability that are underlying those concepts (machine, program, computation, and machine organization, regulation and adaptation). On the other hand, a change in the attitude toward the objetives of artificial intelligence was also required. The given definition pressuposes that one recognizes the operational autonomy of machines, and this implies abandonning the point of view we call artificialism - the search for the imitation of the intelligent behavior of human beings and animals - and adopting the point of view that we call naturalism - which considers that machine intelligence is a natural phenomenon in machines, that should be studied by its own. The work presents the results of the reflexion through which we tried to realize those goals.
Trhlík, Lukáš. "Prodejní a servisní centrum Praha – stavebně technologický projekt." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225401.
Full textThomazo, Luiz Henrique. "Formulação do metodo dos elementos de contorno indireto para resposta transiente em meios visco-elasticos 2D." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263977.
Full textDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
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Resumo: Este trabalho apresenta uma metodologia para a realização de análises dinâmicas estacionárias e transientes em domínios visco-elásticos limitados ou ilimitados, utilizando-se o Método dos Elementos de Contorno. São utilizados como estados auxiliares soluções não-singulares de problemas do semi-espaço e do espaço completo de meios visco-elásticos. Os estados visco-elásticos auxiliares são sintetizados numericamente, tanto no domínio da freqüência, como no domínio do tempo. Os mencionados estados auxiliares são constituídos das soluções em tensão e deslocamento resultantes de cargas espacialmente constantes, aplicadas sob segmentos lineares tanto na superfície de semi-espaços, como no interior de espaços completos. Inicialmente os estados auxiliares são sintetizados numericamente no domínio da freqüência, dando origem à análise de problemas estacionários. Na seqüência estados auxiliares transientes são obtidos a partir da aplicação da transformada de Fourier rápida (FFT) sobre os estados estacionários mencionados. Os estados auxiliares são utilizados para a síntese de uma versão não singular Indireta do MEC (MEC-I) tanto no domínio da freqüência quanto no domínio do tempo. No trabalho ainda é formulada e implementada a inclusão de um corpo rígido interagindo com o meio discretizado pelo MEC-I. O comportamento visco-elástico do contínuo é introduzido pelo princípio da correspondência e são analisados os modelos de histerése constante e de Kelvin-Voigt
Abstract: The main purpose of the present work is to further develop a methodology to perform stationary and transient dynamic analysis of viscoelastic continua by the Boundary Element Method. Numerically synthetized stationary and transient, half-space and full-space auxiliary states are employed to render a non-singular implementation of the indirect version of the Boundary Element Method, IBEM. The auxiliary states used in this word are displacement and traction components stemming from the solution two stress bounary value problems. A constant traction distribution applied at a linear segment over the viscoelastic half-space surface and at the interior of the viscoelastic full-space describe the solutions applied to formulate the BEM. The IBEM is formulated and implemented to render the dynamic solution of bounded and unbounded domains. The interaction of the IBEM mesh with a massless rigid body is also formulated in the context of this work. Viscoelastic effects are included by means of the correspondence principle. The influence of the constant hysteresis and the Kelvin-Voigt damping models are studied.
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
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