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Teses / dissertações sobre o tema "Geometrical constraints"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 9 de fevereiro de 2022

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1

Nestoras, Konstantinos Nav E. Massachusetts Institute of Technology. "A tool to create hydrodynamically optimized hull-forms with geometrical constraints from internal arrangements." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81587.

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Thesis (Nav. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 145-146).<br>Internal arrangements and bulky equipment like machinery have been treated for many years as a secondary aspect of the ship design. Traditionally, in the design process, the centerpiece of the effort is the hull and its hydrodynamic performance. Once the hull of a ship has been selected, all the other systems, like propulsi

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2

Nesselroth, Susan Marian. "I Substituent effects on carbanion photophysics An application of the energy gap law : II Solvent and geometrical constraints on excited state proton transfer." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/30331.

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3

Wang, Bihao. "Geometrical and contextual scene analysis for object detection and tracking in intelligent vehicles." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2197/document.

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Pour les véhicules intelligents autonomes ou semi-autonomes, la perception constitue la première tâche fondamentale à accomplir avant la décision et l’action. Grâce à l’analyse des données vidéo, Lidar et radar, elle fournit une représentation spécifique de l’environnement et de son état, à travers l’extraction de propriétés clés issues des données des capteurs. Comparé à d’autres modalités de perception telles que le GPS, les capteurs inertiels ou les capteurs de distance (Lidar, radar, ultrasons), les caméras offrent la plus grande quantité d’informations. Grâce à leur polyvalence, les camér

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4

Rohmer, Damien. "Géométrie active pour l'animation et la modélisation." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00635079.

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Engendrer en temps-réel des déformations visuellement réalistes d'objets 3D, comme par exemple le corps et les vêtements de personnages, est un point crucial en animation, que ce pour des applications au jeu vidéo ou à la production cinématographique. Les méthodes de déformations géométriques actuelles rapides telles que le "skinning" ou l'animation physique à basse résolution ne capturent cependant pas certains comportements naturels essentiels. En particulier les déformations à volume constant du corps, le gonflement des muscles pour un personnage, ou la génération de plis sur ses vêtements

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5

Seth, Abhishek. "Combining physical constraints with geometric constraint-based modeling for virtual assembly." [Ames, Iowa : Iowa State University], 2007.

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6

Lie, Chin Cheong Patrick. "Geometrically constrained matching schemes." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39316.

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We present an effective method for solving different types of noisy pattern matching problems in Euclidean space. The matching is performed in either a least-squares or a mixed-norm sense under the constraint that a transformation matrix $ Theta$ is restricted to belong to the orthogonal group. Matching problems of this type can be recast as function optimization problems which can be solved by representing the orthogonal group to which $ Theta$ belongs as a Lie group and then investigating the gradient vector field associated with the function to be optimized. The projection of the gradient f

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7

Baltsavias, Emmanuel P. Baltsavias Emmanuel P. Baltsavias Emmanuel P. "Multiphoto geometrically constrained matching /." Zürich, 1991. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=9561.

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8

Coulter, Stewart. "Representation of geometric constraints in parametric synthesis." Thesis, Georgia Institute of Technology, 1994. http://hdl.handle.net/1853/17982.

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9

Phipps, Richard L. "Some Geometric Constraints on Ring-Width Trend." Tree-Ring Society, 2005. http://hdl.handle.net/10150/262639.

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Simulations of tree rings from trees of undisturbed forest sites are used to describe natural, long-term width trends. Ring-width trends of canopy-sized white oak are simulated from regressions of BAI (ring area) data of real trees. Examples are given of a tree from a typical re-growth forest in Illinois and of a more slowly growing tree from an old-growth forest in Kentucky. The long-term width trend was simulated as being toward constant ring width regardless of growth rate of the tree. Conditions by which either increasing or decreasing ring-width trends could be simulated from the same lin

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10

Ma'ani-Hessari, Nason J. "Design of quadruplex DNA through geometric constraints." Thesis, University of Ulster, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.551558.

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This thesis is concerned with the rational design of a group of DNA higher order architectures known as quadruplex DNA. Quadruplex DNA is comprised of a stem of stacking guanine tetrads linked by loops comprised of single stranded DNA. Due to the different combinations of loop types possible, it has great structural diversity and has potential nanotechnological and biological applications. Currently, only a few loop combinations, or topologies are known. Those that have been determined experimentally were not explicitly designed. Using a geometric formalism, the sum of currently available know

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11

Wilczkowiak, Marta. "3D modelling from images using geometric constraints." Grenoble INPG, 2004. http://www.theses.fr/2004INPG0034.

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12

Robson, Mark Andrew. "Geometric quantization of constrained systems." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363252.

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13

Dodwell, Timothy J. "Multilayered folding with constraints." Thesis, University of Bath, 2011. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.549892.

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In the deformation of layered materials such as geological strata, or stacks of paper, mechanical properties compete with the geometry of layering. Smooth, rounded corners lead to voids between layers, while close packing leads to geometrically induced curvature singularities. When creation of voids is penalized by external pressure, the system trades off these competing effects, leading to various accommodating formations. Three two dimensional energy based nonlinear models are presented to describe the formation of voids at areas of intense geological folding. For each model the layers are a

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14

Tarrés, Puertas Marta Isabel. "Direct tree decomposition of geometric constraint graphs." Doctoral thesis, Universitat Politècnica de Catalunya, 2014. http://hdl.handle.net/10803/285011.

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The evolution of constraint based geometric models is tightly tied to parametric and feature-based Computer-Aided Design (CAD) systems. Since the introduction of parametric design by Pro/Engineer in the 1980's, most major CAD systems adopted constraint based geometric models as a core technology. Constraint based geometric models allowed CAD systems to provide a more powerful data model while offering an intuitive user interface. Later on, the same models also found application to fields like linkage design, chemical modeling, computer vision and dynamic geometry. Constraint based geometric m

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15

Hidalgo, García Marta R. "Geometric constraint solving in a dynamic geometry framework." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/134690.

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Geometric constraint solving is a central topic in many fields such as parametric solid modeling, computer-aided design or chemical molecular docking. A geometric constraint problem consists of a set geometric objects on which a set of constraints is defined. Solving the geometric constraint problem means finding a placement for the geometric elements with respect to each other such that the set of constraints holds. Clearly, the primary goal of geometric constraint solving is to define rigid shapes. However an interesting problem arises when we ask whether allowing parameter constraint valu

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16

Lomonosov, Andrew. "Graph and combinatorial algorithms for geometric constraint solving." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0001060.

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17

Latham, Richard Samuel. "Combinatorial algorithms for the analysis and satisfaction of geometric constraints." Thesis, Brunel University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336642.

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18

GRITAI, ALEXEI. "MULTI-VIEW GEOMETRIC CONSTRAINTS FOR HUMAN ACTION RECOGNITION AND TRACKING." Doctoral diss., University of Central Florida, 2007. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4032.

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Human actions are the essence of a human life and a natural product of the human mind. Analysis of human activities by a machine has attracted the attention of many researchers. This analysis is very important in a variety of domains including surveillance, video retrieval, human-computer interaction, athlete performance investigation, etc. This dissertation makes three major contributions to automatic analysis of human actions. First, we conjecture that the relationship between body joints of two actors in the same posture can be described by a 3D rigid transformation. This transformation sim

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19

Stein, Gideon P. (Gideon Pascal). "Geometric and photometric constraints : motion and structure from three views." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/9959.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.<br>Includes bibliographical references (p. 165-171).<br>by Gideon P. Stein.<br>Ph.D.

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20

Lawver, Jordan D. "Robust Feature Tracking in Image Sequences Using View Geometric Constraints." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1365611706.

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21

Fleming, Alan Duncan. "Analysis of uncertainties and geometric tolerances in assemblies of parts." Thesis, University of Edinburgh, 1988. http://hdl.handle.net/1842/6626.

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Computer models of the geometry of the real world have a tendency to assume that the shapes and positions of objects can be described exactly. However, real surfaces are subject to irregularities such as bumps and undulations and so do not have perfect, mathematically definable forms. Engineers recognise this fact and so assign tolerance specifications to their designs. This thesis develops a representation of geometric tolerance and uncertainty in assemblies of rigid parts. Geometric tolerances are defined by tolerance zones which are regions in which the real surface must lie. Parts in an as

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22

KAIMAL, VINOD GOPALKRISHNA. "A NEURAL METHOD OF COMPUTING OPTICAL FLOW BASED ON GEOMETRIC CONSTRAINTS." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1037632137.

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23

Bonifas, Nicolas. "Geometric and Dual Approaches to Cumulative Scheduling." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX119/document.

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Ce travail s’inscrit dans le domaine de l’ordonnancement à base de programmation par contraintes. Dans ce cadre, la contrainte de ressource la plus fréquemment rencontrée est la cumulative, qui permet de modéliser des processus se déroulant de manière parallèle.Nous étudions dans cette thèse la contrainte cumulative en nous aidant d’outils rarement utilisés en programmation par contraintes (analyse polyédrale, dualité de la programmation linéaire, dualité de la géométrie projective) et proposons deux contributions pour le domaine.Le renforcement cumulatif est un moyen de générer des contrainte

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24

Faulke, Darren Andrew. "The effect of geometric constraint on mixed mode crack paths." Thesis, University College London (University of London), 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285148.

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25

Oung, Jianjun. "Design and implementation of an object-oriented geometric constraint solver." [Gainesville, Fla.] : University of Florida, 2001. http://etd.fcla.edu/etd/uf/2001/ank7123/thesis.pdf.

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Thesis (M.S.)--University of Florida, 2001.<br>Title from first page of PDF file. Document formatted into pages; contains ix, 82 p.; also contains graphics. Vita. Includes bibliographical references (p. 78-81).

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26

Chen, Jin. "The use of multiple cameras and geometric constraints for 3-D measurement." Thesis, City University London, 1995. http://openaccess.city.ac.uk/7542/.

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This thesis addresses some of the problems involved in the automation of 3-D photogrammetric measurement using multiple camera viewpoints. The primary research discussed in this thesis concerns the automatic solution of the correspondence problem. This and associated research has led to the development of an automated photograrnmetric measuring system which combines the techniques from both machine vision and photogrammetry. Such a system is likely to contribute greatly to the accessibility of 3-D measurement to non-photogrammetrists who will generally have little knowledge and expertise of ph

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27

Shehadeh, Mhd Ali. "Geometrické řízení hadům podobných robotů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417115.

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This master’s thesis describes equations of motion for dynamic model of nonholonomic constrained system, namely the trident robotic snakes. The model is studied in the form of Lagrange's equations and D’Alembert’s principle is applied. Actually this thesis is a continuation of the study going at VUT about the simulations of non-holonomic mechanisms, specifically robotic snakes. The kinematics model was well-examined in the work of of Byrtus, Roman and Vechetová, Jana. So here we provide equations of motion and address the motion planning problem regarding dynamics of the trident snake equipped

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28

Patel, Pritesh V. "Stepwise construction and spectroscopy of geometrically constrained bimetallic molecular triads." Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.427410.

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29

Bass, Henry Morgan. "Automatic modification of part geometries subject to manufacturing constraints using fuzzy logic." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/45086.

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There is frequently a need for algorithms capable of automatic modification of geometric models in response to manufacturing process constraints. Designers typically initiate product models using ideal, exact geometry; however, several non-traditional manufacturing processes frequently require slight modifications to the ideal model to accommodate various manufacturing process constraints. These modifications can be difficult, complex, and tedious to compute. For instance, metal-ceramic brazing requires adjustments to the part geometry primarily to accommodate thermal expansion and to allow f

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30

MEDEIROS, VIVIAN SUZANO. "DETERMINATION OF THE OPTIMAL TRAJECTORIES ON RACE TRACKS WITH DYNAMIC AND GEOMETRIC CONSTRAINTS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=25685@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO<br>FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO<br>O presente projeto de pesquisa objetiva desenvolver um procedimento para determinação de trajetórias ótimas em pistas de corrida baseado em técnicas de otimização, considerando os limites geométricos da pista e as características dinâmicas do veículo. O veículo será representado por meio de um modelo simplificado de partícula orientada, mas que inclui as capacidades de tração, frenagem e aceleração normal típicas de u

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31

Kohareswaran, Naganandhini. "Design and implementation of Sketcher user interface for a geometric constraint solver /." [Gainesville, Fla.] : University of Florida, 2002. http://purl.fcla.edu/fcla/etd/UFE0000556.

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32

Campher, Andre Herman. "A systematic approach to model predictive controller constraint handling : rigorous geometric methods." Diss., University of Pretoria, 2011. http://hdl.handle.net/2263/28378.

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The models used by model predictive controllers (MPCs) to predict future outcomes are usually unconstrained forms like impulse or step responses and discrete state space models. Certain MPC algorithms allow constraints to be imposed on the inputs or outputs of a system; but they may be infeasible as they are not checked for consistency via the process model. Consistent constraint handling methods - which account for their interdependence and disambiguate the language used to specify constraints – would therefore be an attractive aid when using any MPC package. A rigorous and systematic approac

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33

Demenkov, Maxim. "Geometric algorithms for input constrained systems with application to flight control." Thesis, De Montfort University, 2007. http://hdl.handle.net/2086/4950.

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In this thesis novel numerical algorithms are developed to solve some problems of analysis and control design for unstable linear dynamical systems having their input constrained by maximum amplitude and rate of the control signals. Although the results obtained are of a general nature, all the problems considered are induced by flight control applications. Moreover, all these problems are stated in terms of geometry, and because of this their solution in the thesis was effectively achieved by geometrically-oriented methods. The problems considered are mainly connected with the notions of the

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34

Diedrich, Florian [Verfasser]. "Approximation algorithms for linear programs and geometrically constrained packing roblems / Florian Diedrich." Kiel : Universitätsbibliothek Kiel, 2009. http://d-nb.info/1019865903/34.

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35

Changizi, Navid. "FRAME TOPOLOGY OPTIMIZATION WITH STANDARD CROSS SECTIONS: ACCOUNTING FOR BUCKLING, STRESS CONSTRAINTS AND GEOMETRIC VARIABILITY." Cleveland State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=csu1470847100.

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36

Wong, Kok Cheong. "Representation, feature extraction and geometric constraints for recognising 3D objects from a single perspective view." Thesis, University of Surrey, 1992. http://epubs.surrey.ac.uk/843449/.

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This dissertation considers the problem of modelling, feature extraction and recognizing 3D objects from a single perspective view. A solid modelling system based on generalized cylinder is presented. A new algorithm is proposed for grouping 2D line segments into intermediate token features to be used as geometric cues for indexing into the model database and for generating hypotheses for polyhedral objects. A polyhedral object recognition system using a hypothesis and verification paradigm has been proposed and developed. In the modelling system, generalized cylinders are used as geometric pr

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37

Foster, Michael S. "Using Lidar to geometrically-constrain signature spaces for physics-based target detection /." Online version of thesis, 2007. http://hdl.handle.net/1850/5827.

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38

Bole, Marcus. "A hull surface generation technique based on a form topology and geometric constraint approach." Thesis, University of Strathclyde, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288605.

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39

Salgado, Rebolledo Patricio. "Symplectic Structure of Constrained Systems: Gribov Ambiguity and Classical Duals for 3D Gravity." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/220463.

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The present thesis is divided into two parts. Part I is devoted to the study of Gribov ambiguity in gauge systems and its relation with the appearance of degeneracies in the symplectic structure of the corresponding reduced phase space after gauge fixation. Part II is concerned with classical dual field theories for three-dimensional Einstein gravity and the symplectic structure on coadjoint orbits of the corresponding asymptotic symmetry group.In Part I, the Gribov problem is studied in the context of finite temperature QCD and the structure of the gluon propagator is analyzed. The standard c

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40

Kivelä, S. M. (Sami Mikael). "Evolution of insect life histories in relation to time constraints in seasonal environments:polymorphism and clinal variation." Doctoral thesis, Oulun yliopisto, 2011. http://urn.fi/urn:isbn:9789514293788.

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Abstract Both the length of the season that is favourable for insect growth and reproduction and the number of generations emerging per season (voltinism) increase with decreasing latitude. Thus, time constraints on reproduction and juvenile development decrease with decreasing latitude, except where voltinism changes and time constraints suddenly increase as the season must be shared with one more generation. I studied the evolution of insect life histories in relation to time constraints from two perspectives: polymorphism and clinal variation. Life history polymorphism in seasonal environme

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41

Keuthen, Moritz [Verfasser], Michael [Akademischer Betreuer] Ulbrich, Roland [Akademischer Betreuer] Herzog, and Wolfgang [Akademischer Betreuer] Ring. "Second Order Shape Optimization with Geometric Constraints / Moritz Keuthen. Betreuer: Michael Ulbrich. Gutachter: Roland Herzog ; Wolfgang Ring ; Michael Ulbrich." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/1082034258/34.

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42

Lindqvist, Björn. "Combined Control and Path Planning for a Micro Aerial Vehicle based on Non-linear MPC with Parametric Geometric Constraints." Thesis, Luleå tekniska universitet, Rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-76212.

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Using robots to navigate through un-mapped environments, specially man-made infrastructures, for the purpose of exploration or inspection is a topic that has gathered a lot of interest in the last years. Micro Aerial Vehicles (MAV's) have the mobility and agility to move quickly and access hard-to-reach areas where ground robots would fail, but using MAV's for that purpose comes with its own set of problems since any collision with the environment results in a crash. The control architecture used in a MAV for such a task needs to perform obstacle avoidance and on-line path-planning in an unkno

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Keuthen, Moritz Verfasser], Michael [Akademischer Betreuer] [Ulbrich, Roland [Akademischer Betreuer] Herzog, and Wolfgang [Akademischer Betreuer] Ring. "Second Order Shape Optimization with Geometric Constraints / Moritz Keuthen. Betreuer: Michael Ulbrich. Gutachter: Roland Herzog ; Wolfgang Ring ; Michael Ulbrich." München : Universitätsbibliothek der TU München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:91-diss-20151221-1275877-1-5.

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44

Oyini, Mbouna Ralph. "Illumination Independent Head Pose and Pupil Center Estimation for Gaze Computation." Master's thesis, Temple University Libraries, 2011. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/208725.

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Electrical Engineering<br>M.S.E.E.<br>Eyes allow us to see and gather information about the environment. Eyes mainly act as an input organ as they collect light, but they also can be considered an output organ as they indicate the subject's gaze direction. Using the orientation of the head and the position of the eyes, it is possible to estimate the gaze path of an individual. Gaze estimation is a fast growing technology that track a person's eyes and head movements to "pin point" where the subject is looking at on a computer screen. The gaze direction is described as a person's line of sight.

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45

Napolitano, Ralph E. Jr. "Finite differenc-cellular automation modeling of the evolution of interface morphology during alloy solidification under geometrical constraint : application to metal matrix composite solidification." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/32810.

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De, Leon Daniel Milbrath. "Otimização topológica de mecanismos flexíveis com controle da tensão máxima considerando não linearidades geométrica e material." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/118880.

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Mecanismos flexíveis, nos quais a deformação elástica é aproveitada na atuação cinemática, têm grande empregabilidade em dispositivos de mecânica de precisão, engenharia biomédica, e mais recentemente em microeletromecanismos (MEMS). Entre as diversas técnicas empregadas para o seu projeto, a otimização topológica tem se mostrado a mais genérica e sistemática. A grande dificuldade destes projetos é conciliar os requisitos cinemáticos com a resistência mecânica da estrutura. Neste trabalho, é implementado um critério de resistência dentro da formulação do problema de otimização, com o intuito d

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47

Olakoyejo, O. T. (Olabode Thomas). "Geometric optimisation of conjugate heat transfer in cooling channels with different cross-sectional shapes." Thesis, University of Pretoria, 2012. http://hdl.handle.net/2263/25484.

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In modern heat transfer, shape and geometric optimisation are new considerations in the evaluation of thermal performance. In this research, we employed constructal theory and design to present three-dimensional theoretical and numerical solutions of conjugate forced convection heat transfer in heat generating devices with cooling channels of different cross-sectional shapes. In recent times, geometric configurations of cooling channel have been found to play an important role in thermal performance. Therefore, an efficient ways of optimally designing these cooling channels shapes is required.

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Castanheiro, Letícia Ferrari. "Geometric model of a dual-fisheye system composed of hyper-hemispherical lenses /." Presidente Prudente, 2020. http://hdl.handle.net/11449/192117.

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Orientador: Antonio Maria Garcia Tommaselli<br>Resumo: A combinação de duas lentes com FOV hiper-hemisférico em posição opostas pode gerar um sistema omnidirecional (FOV 360°) leve, compacto e de baixo custo, como Ricoh Theta S e GoPro Fusion. Entretanto, apenas algumas técnicas e modelos matemáticos para a calibração um sistema com duas lentes hiper-hemisféricas são apresentadas na literatura. Nesta pesquisa, é avaliado e definido um modelo geométrico para calibração de sistemas omnidirecionais compostos por duas lentes hiper-hemisféricas e apresenta-se algumas aplicações com esse tipo de sis

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49

Imbach, Rémi. "Résolution de contraintes géométriques en guidant une méthode homotopique par la géométrie." Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAD033/document.

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Suivant le domaine où on les sollicite, les solutions d’un système de contraintes géométriques (SCG) peuvent être : – formelles et exactes : elles prennent par exemple la forme d’un plan de construction produisant toutes les solutions, obtenu en appliquant des règles dérivées de lemmes de géométrie. Beaucoup de SCG, surtout en 3D, résistent à cette approche ; – numériques et approchées : elles sont les solutions d’un système d’équations construit à partir des contraintes et trouvées grâce à des méthodes numériques efficaces quand elles ne recherchent qu’une solution. De par la nature des probl

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50

Hu, Hao. "Detection and treatment of inconsistent or locally over-constrained configurations during the manipulation of 3D geometric models made of free-form surfaces." Thesis, Paris, ENSAM, 2018. http://www.theses.fr/2018ENAM0002/document.

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Trois modules seront développés: Le module de détection a produit une analyse des problématiques figurations con, à savoir un ensemble de domaines où soit quelques nouveaux DDL ou des changements locaux dans les contraintes sont obligatoires. Le module de traitement permettra à la défi nition des mécanismes pour aider la décision sur modi cations. Le module de prédiction dire le degré de déformation en pré-analyser les caractéristiques des configurations de NURBS<br>Three modules will be developed: The detection module has produced an analysis of problematic con figurations, i.e. a set of area

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