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Дисертації з теми "FGM Algorithm"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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1

Dunkelberg, Jr John S. "FEM Mesh Mapping to a SIMD Machine Using Genetic Algorithms." Digital WPI, 2001. https://digitalcommons.wpi.edu/etd-theses/1154.

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Анотація:

The Finite Element Method is a computationally expensive method used to perform engineering analyses. By performing such computations on a parallel machine using a SIMD paradigm, these analyses' run time can be drastically reduced. However, the mapping of the FEM mesh elements to the SIMD machine processing elements is an NP-complete problem. This thesis examines the use of Genetic Algorithms as a search technique to find quality solutions to the mapping problem. A hill climbing algorithm is compared to a traditional genetic algorithm, as well as a "messy" genetic algorithm. The results and co

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2

Banihashemi, Seyed Parsa. "Parallel explicit FEM algorithms using GPU's." Diss., Georgia Institute of Technology, 2015. http://hdl.handle.net/1853/54391.

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The Explicit Finite Element Method is a powerful tool in nonlinear dynamic finite element analysis. Recent major developments in computational devices, in particular, General Purpose Graphical Processing Units (GPGPU's) now make it possible to increase the performance of the explicit FEM. This dissertation investigates existing explicit finite element method algorithms which are then redesigned for GPU's and implemented. The performance of these algorithms is assessed and a new asynchronous variational integrator spatial decomposition (AVISD) algorithm is developed which is flexible and enco

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3

Nie, Sixiang. "Solving the photon diffusion equation by FEM with Lanczos Algorithm." Thesis, University of Hawaii at Manoa, 2003. http://hdl.handle.net/10125/6985.

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In this thesis, finite element method (FEM) with Lanczos algorithm under uniform-grid and multi-grid meshes, denoted as FEML-U and FEML-M algorithms respectively, are introduced to solve the photon diffusion equation. In FEML-U and FEML-M algorithms, an n-dimensional state-space system is established by FEM, and the output of this system is approximated by that of an m-dimensional reduced system, which is generated by Lanczos algorithm. The implementations of FEML-U and FEML-M algorithms simulate the output at detectors of two given organ-size phantoms, and the corresponding simulators are val

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4

Bucher, Anke, Arnd Meyer, Uwe-Jens Görke, and Reiner Kreißig. "Entwicklung von adaptiven Algorithmen für nichtlineare FEM." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601424.

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The development of adaptive finite element procedures for the solution of geometrically and physically nonlinear problems in structural mechanics is very important for the augmentation of the efficiency of FE-codes. In this contribution methods of mesh refinement as well as mesh coarsening are presented for a material model considering finite elasto-plastic deformations. For newly generated elements stresses, strains and internal variables have to be calculated. This implies the determination of the nodal values as well as the Gaussian point values of the new elements based on the

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5

Mach, Thomas. "Eigenvalue Algorithms for Symmetric Hierarchical Matrices." Doctoral thesis, Universitätsbibliothek Chemnitz, 2012. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-85308.

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This thesis is on the numerical computation of eigenvalues of symmetric hierarchical matrices. The numerical algorithms used for this computation are derivations of the LR Cholesky algorithm, the preconditioned inverse iteration, and a bisection method based on LDLT factorizations. The investigation of QR decompositions for H-matrices leads to a new QR decomposition. It has some properties that are superior to the existing ones, which is shown by experiments using the HQR decompositions to build a QR (eigenvalue) algorithm for H-matrices does not progress to a more efficient algorithm than th

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6

Dunkelberg, John S. "FEM mesh mapping to a SIMD machine using genetic algorithms." Link to electronic version, 2001. http://www.wpi.edu/Pubs/ETD/Available/etd-0104101-102839/.

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7

Zhou, Dajun. "Development and testing of a new algorithm for FEM of sheet forming /." The Ohio State University, 1993. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487847309051811.

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8

Mach, Thomas. "Eigenvalue Algorithms for Symmetric Hierarchical Matrices." Doctoral thesis, Max Planck Institute for Dynamics of Complex Technical Systems, 2011. https://monarch.qucosa.de/id/qucosa%3A19684.

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Анотація:

This thesis is on the numerical computation of eigenvalues of symmetric hierarchical matrices. The numerical algorithms used for this computation are derivations of the LR Cholesky algorithm, the preconditioned inverse iteration, and a bisection method based on LDLT factorizations. The investigation of QR decompositions for H-matrices leads to a new QR decomposition. It has some properties that are superior to the existing ones, which is shown by experiments using the HQR decompositions to build a QR (eigenvalue) algorithm for H-matrices does not progress to a more efficient algorithm than th

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9

Chalmers, Stewart John. "A study of design methodologies for fault tolerant state machine controllers." Thesis, Robert Gordon University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313452.

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10

Eibner, Tino, and Jens Markus Melenk. "Fast algorithms for setting up the stiffness matrix in hp-FEM: a comparison." Universitätsbibliothek Chemnitz, 2006. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200601623.

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We analyze and compare different techniques to set up the stiffness matrix in the hp-version of the finite element method. The emphasis is on methods for second order elliptic problems posed on meshes including triangular and tetrahedral elements. The polynomial degree may be variable. We present a generalization of the Spectral Galerkin Algorithm of [7], where the shape functions are adapted to the quadrature formula, to the case of triangles/tetrahedra. Additionally, we study on-the-fly matrix-vector multiplications, where merely the matrix-vector multiplication is realized with

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11

Eibner, Tino. "A fast and efficient algorithm to compute BPX- and overlapping preconditioner for adaptive 3D-FEM." Universitätsbibliothek Chemnitz, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-200801271.

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In this paper we consider the well-known BPX-preconditioner in conjunction with adaptive FEM. We present an algorithm which enables us to compute the preconditioner with optimal complexity by a total of only O(DoF) additional memory. Furthermore, we show how to combine the BPX-preconditioner with an overlapping Additive-Schwarz-preconditioner to obtain a preconditioner for finite element spaces with arbitrary polynomial degree distributions. Numerical examples illustrate the efficiency of the algorithms.

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12

Witkowski, Thomas. "Software concepts and algorithms for an efficient and scalable parallel finite element method." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-141651.

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Software packages for the numerical solution of partial differential equations (PDEs) using the finite element method are important in different fields of research. The basic data structures and algorithms change in time, as the user\'s requirements are growing and the software must efficiently use the newest highly parallel computing systems. This is the central point of this work. To make efficiently use of parallel computing systems with growing number of independent basic computing units, i.e.~CPUs, we have to combine data structures and algorithms from different areas of mathematics and c

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13

Zhuang, Shoubing. "Enhancing Implicit Finite Element Sheet Forming Simulation." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1206124132.

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14

Kiridena, Vijitha S. "A 3-D search and interpolate algorithm for remeshing in large deformation FEM metal forming analysis." Ohio : Ohio University, 1989. http://www.ohiolink.edu/etd/view.cgi?ohiou1182439927.

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15

Renova, Elvia Paola. "Simulated annealing algorithms for the optimization of particulate composite structures analyzed by X-FEM." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2008. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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16

Bernert, Katrin. "Algorithmus zur adaptiven Neuvernetzung des Werkstückes für die FEM-Simulation des Querwalzens." Thesis, Universitätsbibliothek Chemnitz, 2004. http://nbn-resolving.de/urn:nbn:de:swb:ch1-200400858.

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Анотація:

Die Methode der finiten Elemente wird zunehmend zur Analyse von Umformprozessen eingesetzt, wobei das Werkstück wegen der dabei auftretenden großen Formänderungen regelmäßig neu vernetzt werden muss. Für die Simulation des Querwalzens von dickwandigen Rohren und Vollprofilen mit dem Programm MSC.MARC wurde in dieser Arbeit eine adaptive Neuvernetzung konzipiert und implementiert sowie an einem Beispiel (Querwalzen eines Rohres) getestet. Die gestellten Anforderungen bezüglich der Abbildung der Geometrie, der Gewährleistung von Symmetrie und Netzqualität sowie der Flexibilität hinsichtlichlich

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17

Bernert, Katrin. "Algorithmus zur adaptiven Neuvernetzung des Werkstückes für die FEM-Simulation des Querwalzens." [S.l. : s.n.], 2004. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB11244006.

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18

Breslavsky, D. V., V. O. Mietielov, O. K. Morachkovsky, S. O. Pashchenko, and О. А. Tatarinova. "Asymptotic methods and finite element method in cyclic creep-damage problems." Thesis, Львівський національний університет ім. І. Франка, 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/19395.

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19

Borander, Anne-Siri. "Parallel processing of optimization algorithms : A faster way to optimize electric power problems that utilize FEM-simulations." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27162.

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The aim of this thesis was to find a way of doing optimizations based on FEM-simulations and further to parallelize the computations in order to decrease the execution time. If proven possible the difficulty setting up these simulation and the expected decrease in runtime, would to be evaluated. Optimizations of magnet field strength and torque utilizing FEM simulations were conducted by using the particle swarm optimization (PSO) algorithm and the Matlab "partial differential equation toolbox" (PDE-toolbox). Two cases were optimized with and without parallel processing, and runtimes

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20

Hluška, Milan. "Využití rychlého algoritmu kosoúhlého rovnání k optimalizaci procesu rovnání pomocí neuronových sítí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-418190.

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Master's thesis deals with a fast cross roll bar straightening algorithm and its modifications to allow for an automatic calculation of a large number of simulations and an arbitrary straightening machine configuration. Modified program is then verified using the original algorithm. It also deals with the algorithm's application to straightening process optimization using neural networks.

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21

Reuter, Balthasar. "Coarsening of Simplicial Meshes for Large ScaleParallel FEM Computations with DOLFIN HPC : A parallel implementation of the edge collapse algorithm." Thesis, KTH, Numerisk analys, NA, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124240.

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Adaptive mesh refinement and coarsening methods are effective techniques to reduce the computation time of finite element based solvers. Parallel imple- mentations of such adaption routines, suitable for large scale computations on distributed memory machines, need additional care. In this thesis, a coarsening technique based on edge collapses is presented, its implementation and opti- mization for parallel computations explained and it is analyzed with respect to coarsening efficiency and performance. As a possible application the use of mesh coarsening in adaptive flow simulations is demonst

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22

Ireland, David John. "Dielectric Antennas and Their Realisation Using a Pareto Dominance Multi-Objective Particle Swarm Optimisation Algorithm." Thesis, Griffith University, 2010. http://hdl.handle.net/10072/365312.

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Antennas utilising a dielectric medium are technologies that have become popular in modern wireless platforms. They offer several desirable features such as high efficiency, electrically small and resistance to proximity detuning. Being a volumetric radiator however, realising a final, commercially competitive solution, often requires the use of a computational optimisation algorithm. In the realm of antenna design the practice of optimisation typically involves an automated routine consisting of a heuristic algorithm and a forward solving engine such as the finite element method (FEM) or fin

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23

Rahmany, Sajjad. "Utilisation des bases de Gröbner SAGBI pour la résolution des systèmes polynômiaux invariants par symétries." Paris 6, 2009. http://www.theses.fr/2009PA066214.

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Анотація:

Dans cette thèse, nous proposons une méthode efficace pour résoudre des systèmes polynômiaux dont les équations sont invariantes par l'action d'un groupe fini G. L'idée est calculer simultanément une base de Gröbner SAGBI(une génération des bases de Gröbner à des idéaux de sous algèbres de l'anneau des polynômes) et une base de Gröbner dans l'anneau des invariants symétriques. Plus précisément, nous proposons dans cette thèse deux algorithmes: nous explicitions d'abord un algorithme à la F5 pour calculer efficacement une base de Gröbner SAGBI. Le deuxième algorithme est une version légèrement

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24

Fedorik, Filip. "Využití optimalizačních algoritmů při návrhování konstrukcí." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2013. http://www.nusl.cz/ntk/nusl-233792.

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The application of optimization algorithms in the design of many economical and industrial problems currently represents a significant assignment. The development of high-powered computers allows an application of difficult mathematical techniques and physical phenomena to simulate real problems with sufficient accuracy. The optimization techniques used in engineering designs are mostly represented by modified mathematical programming methods with extension of their usability. The aim of the presented thesis "Using Optimization´s Algorithms by Designing of Structures" is to analyze the applica

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25

Zhu, Zimo. "Techniques for Finite Element Modeling and Remodeling of Bones with Applications to Pig Skulls." University of Cincinnati / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1512045879980572.

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26

Ramirez, Villalba Leidy catherine. "Towards an efficient modeling of Fluid-Structure Interaction." Thesis, Ecole centrale de Nantes, 2020. http://www.theses.fr/2020ECDN0029.

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Анотація:

Les applications industrielles FSI se caractérisent par des géométries et des matériaux complexes. Afin de prédire avec précision leur comportement, des coûts de calcul élevés sont associés, à la fois en temps et en ressources informatiques. Pour améliorer la qualité de la prédiction sans pénaliser le temps de calcul, et pour réduire le temps de calcul sans impacter la précision disponible aujourd'hui, deux axes principaux sont explorés dans ce travail. Le premier est l'étude d'un algorithme asynchrone qui pourrait permettre l'utilisation de modèles structurels complexes. Le second consiste à

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27

Valackaitė, Laisvūnė. "Adaptyvios genetinių algoritmų strategijos mechaninių struktūrų formai optimizuoti." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140625_094615-34888.

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Šiame baigiamajame darbe optimizuojama plokščiojo kūno forma esant žinomai apkrovai ir kraštinėms sąlygoms. Aptariami pagrindiniai optimizavimo tipai, globaliojo optimizavimo ir kontinuumo diskretizavimo metodai. Forma optimizuojama trimis skirtingais neadaptyviais genetiniais algoritmais ir trimis adaptyviais, taikant migracijos strategijas. Poslinkiai ir von Mises įtempimai skaičiuojami baigtinių elementų metodu. Darbo užduotis realizuota C++ kalba. Darbą sudaro 9 dalys: įvadas, kūno formos modeliavimo metodų apžvalga, baigtinių elementų metodas, genetiniai algoritmai, kūno formos optimizavi

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28

Al-Daraiseh, Ahmad. "GENETICALLY ENGINEERED ADAPTIVE RESONANCE THEORY (ART) NEURAL NETWORK ARCHITECTURES." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3171.

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Fuzzy ARTMAP (FAM) is currently considered to be one of the premier neural network architectures in solving classification problems. One of the limitations of Fuzzy ARTMAP that has been extensively reported in the literature is the category proliferation problem. That is Fuzzy ARTMAP has the tendency of increasing its network size, as it is confronted with more and more data, especially if the data is of noisy and/or overlapping nature. To remedy this problem a number of researchers have designed modifications to the training phase of Fuzzy ARTMAP that had the beneficial effect of reducing thi

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29

Miglioretti, Federico. "Développement d'un modèle avancé multi-champs pour l'étude de profil d'aile intelligent." Thesis, Paris 10, 2013. http://www.theses.fr/2013PA100054/document.

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Dans le domaine de l’aéronautique, l’acception ‘shape morphing’ a été utilisée pour identifier ces avions qui subissent certaine modifications géométrique pour améliorer leur adaptation au différents profils de missions. Différemment de la solution classique, celle ‘shape morphing’ exige : une distribution d’actionnement avec une densité de puissance élevée, une mécanisation des structures, des revêtements souples, et le développement des loi de contrôle. Dans ce scénario, un modèle capable reconnaitre l'insertion de capteur et d'actionneur de nouvelle génération, et capable de réduire au mini

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30

Aït, Hamouda Sonia. "Algorithmes avancés d'enregistrement d'images pour les problèmes dynamiques." Electronic Thesis or Diss., Pau, 2024. http://www.theses.fr/2024PAUU3050.

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À travers cette thèse, nous avons exploré les défis liés à la transition énergétique et particulièrement au stockage d’électricité dans des batteries à électrolyte solide. Bien que le développement de cette technologie et les avancées des performances et de sécurité sont considérées comme une révolution, des recherches récentes ont constaté que les phénomènes d’emballement thermique pourraient également se produire. La tomographie à rayons X permet d’observer ce phénomène en trois dimensions et au fil du temps. Cependant, si l’on souhaite comparer des images à deux instants différents, avant e

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31

Sparnacci, Nicola. "Localizzazione e navigazione congiunta di droni." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/15758/.

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In questa tesi vengono analizzati aspetti legati alla navigazione e localizzazione congiunta di Unmanned Aerial-Vehicle (UAV) per la ricerca della formazione ottimale in modo da minimizzare l'errore di stima della posizione di un target, situato in ambienti indoor piuttosto che outdoor. Attraverso l’uso di modelli d'osservazione realistici che tengono conto anche di eventuali scenari in cui vi sia un collegamento Non-Line of Sight (NLOS) tra target e UAV, vengono derivate le grandezze fondamentali legate al Cramér-Rao Lower Bound (CRLB) come la Fisher Information Matrix (FIM) e il Position Err

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32

Venturini, Luca. "Gemello digitale di un ponte in muratura mediante analisi modale operazionale e algoritmi genetici." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.

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Il monitoraggio strutturale è un processo che, nell’ambito ingegneristico, mira a identificare la nascita e/o l’evoluzione del danno nelle strutture. Il paradigma prevede l’installazione di sensori sulla struttura, per monitorarne nel tempo alcuni parametri, e l’utilizzo di modelli strutturali e algoritmi che a partire dai dati misurati siano in grado di rilevarne eventuali danni. In seno al monitoraggio strutturale vive il problema di identificazione strutturale, cioè l’insieme di strategie analitiche e sperimentali atte a calibrare i modelli strutturali, quindi a generare dei gemelli digita

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33

Chen, Bernard. "Discovery and Extraction of Protein Sequence Motif Information that Transcends Protein Family Boundaries." Digital Archive @ GSU, 2009. http://digitalarchive.gsu.edu/cs_diss/42.

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Protein sequence motifs are gathering more and more attention in the field of sequence analysis. The recurring patterns have the potential to determine the conformation, function and activities of the proteins. In our work, we obtained protein sequence motifs which are universally conserved across protein family boundaries. Therefore, unlike most popular motif discovering algorithms, our input dataset is extremely large. As a result, an efficient technique is essential. We use two granular computing models, Fuzzy Improved K-means (FIK) and Fuzzy Greedy K-means (FGK), in order to efficient

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34

Pařízek, Daniel. "Návrh algoritmu výpočtu rotoru elektrického stroje s ohledem na napěťově deformační poměry a kritické otáčky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401514.

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The Master's thesis deals with the mechanical design of electric machine rotor. Within the first two chapters of the practical part of the thesis two simplified computational models of the rotor (level 1 models) are compiled. Specifically, the model of flexible rotor mounted on rigid supports and model of rigid rotor mounted on flexible supports. The essence of these computational models lies in solvability using simple equations. Using these models can save time when constructing a pre-design of the rotor geometry. The following chapter is devoted to comparing different approaches to computat

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35

Cusenza, Monica. "Fractal analysis of the EEG and clinical applications." Doctoral thesis, Università degli studi di Trieste, 2012. http://hdl.handle.net/10077/7394.

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2010/2011<br>Most of the knowledge about physiological systems has been learned using linear system theory. The randomness of many biomedical signals has been traditionally ascribed to a noise-like behavior. An alternative explanation for the irregular behavior observed in systems which do not seem to be inherently stochastic is provided by one of the most striking mathematical developments of the past few decades, i.e., chaos theory. Chaos theory suggests that random-like behavior can arise in some deterministic nonlinear systems with just a few degrees of freedom. One of the most evocative a

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36

Nytra, Michal. "Simulace zápustkového kování pomocí metody konečných prvků." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400519.

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Tato diplomová práce se zabývá výpočtovým modelováním zápustkového kování, které patří do metod objemového tváření zatepla. Cílem je změnit běžnou praxi tvorby výpočtových modelů ve specializovaných softwarech na bázi metody konečných prvků (MKP) a sestavit výpočtový model v MKP softwaru Abaqus. Pro výpočet jsou zde použity deformační varianta MKP a explicitní algoritmus. Řešenou součástí je ozubené kolo automobilové převodovky. V rámci práce je vytvořena rešerše z oblasti objemového tváření včetně specializovaných programů pro simulace procesů tváření. Dále jsou v práci uvedeny všechny konsti

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dal, monte andrea. "Development of an open source environment for the aero-structural optimization of wind turbines." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3425842.

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An advanced open source optimization environment, for the design of Horizontal and Vertical Axis Wind Turbines, is hereby presented: several geometric parameters can be used as design variables while the proposed objective functions allow to run a multi-disciplinary study considering structural and aerodynamic analysis and the impact of the design on the total cost. In order to improve the performances of the considered wind turbine model, the airfoils can be parametrized in serveral ways and both in-house functions and open source tools are integrated in the optimization environment, based o

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Goudemand, Charlène. "Amélioration des transmissions video MPEG-2 sur lignes ADSL basée sur une optimisation conjointe source-canal de la qualité video." Valenciennes, 2005. http://ged.univ-valenciennes.fr/nuxeo/site/esupversions/f2cfe3d4-8901-4489-b8a0-a36d41bd21d4.

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L'accès aux services multimédias est aujourd'hui possible pour les particuliers grâce aux technologies ADSL qui permettent des transmissions de données haut débit via les lignes téléphoniques. Cependant, la réception de vidéo n'est accessible qu'aux abonnés ayant une bonne qualité de ligne. Nous présentons dans le cadre de cette thèse un système original d'optimisation de la qualité vidéo transmise sur ligne ADSL dans le but d'élargir la zone de couverture de télédiffusion sur ADSL déjà existante. Le système s'appuie sur une optimisation conjointe source/canal. En effet, le codage source consi

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Ščerba, Bořek. "Vliv nastavení a konfigurace rovnačky na výsledky simulace kosoúhlého rovnání." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-418209.

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Analytical methods or implicit finite element method (FEM) with beam elements to model straightened bar were used to analyze straightening process in multi-staggered cross-roll straighteners up to now. These are effective but require certain simplifications. Aim of this thesis is to create an explicit FEM model allowing usage of solid elements for circular bar without disproportional increase of computational time. This may lead to deeper understanding of the straightening process. The model is to be verified using straightening tables and then used to quantify influence of rollers configurati

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Kjellén, Kevin. "Point Cloud Registration in Augmented Reality using the Microsoft HoloLens." Thesis, Linköpings universitet, Datorseende, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-148901.

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When a Time-of-Flight (ToF) depth camera is used to monitor a region of interest, it has to be mounted correctly and have information regarding its position. Manual configuration currently require managing captured 3D ToF data in a 2D environment, which limits the user and might give rise to errors due to misinterpretation of the data. This thesis investigates if a real time 3D reconstruction mesh from a Microsoft HoloLens can be used as a target for point cloud registration using the ToF data, thus configuring the camera autonomously. Three registration algorithms, Fast Global Registration (F

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Pecorella, Daniele. "Methodology for the design and optimization of a morphing wing droop-nose structure for greener aircraft." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.

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Droop-Nose Leading Edge (DNLE) morphing wings are one of the most promising devices in order to achieve aerodynamic drag and noise reduction during take-off and landing phases. An accurate design of these structures could lead to the decrease of aircraft fuel consumption in the perspective of reaching a greener aviation, following the objectives indicated by Flightpath 2050 issued by the E.U. However, due to the challenges related to the realization of this technology and TRL reached, DNLE are more likely implemented in Unmanned Aerial Systems (UAS) for testing and evaluation purposes. In the

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SINGH, ISHA. "SOME STUDIES ON IMAGE ENHANCEMENT AND FILTERING." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2020. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18449.

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Images are one of the best sources for research & communication. Proper analysis of image data is essential for various fields like satellite images & remote sensing, Biometrics, Criminology, military surveillance, astrology & many more. Requirements of the users vary according to the nature of application in use.Image processing plays a critical role in the analysis of data and is an integral part for various applications. Image denoising is one of the challenging branches of image processing. Impulse noise is among the prevalent noises that degrade the image quality and its subsequent noise

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Rukavina, Ivan. "Cyber-physics intrinsic modelling for smart systems." Thesis, Compiègne, 2021. http://bibliotheque.utc.fr/EXPLOITATION/doc/IFD/2021COMP2581.

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Dans le cadre de cette thèse, une approche de calcul de couplage multi-échelle et multi-physique en 2D et en 3D est présentée. La modélisation multi-échelle d’une structure consiste de l’échelle macro qui représente la réponse homogénéisée de la structure entière, tandis que l’échelle micro peut capturer les détails du comportement à la petite échelle du matériau, où des mécanismes inélastiques, tels que la plasticité ou l’endommagement, peuvent être pris en compte. L’intérieur de chaque macro-élément est rempli par le maillage à l’échelle micro qui s’y adapte entièrement. Les deux échelles so

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Liu, Wai Chih, and 劉威志. "Suboptimal Neighborhood FGSM Construction for FKF Algorithm." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/47724125304830203282.

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TSAI, CHENG-LIN, and 蔡政霖. "Weighed FCM algorithm with an application in color image segmentation." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/398w7x.

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碩士<br>國立清華大學<br>應用數學系所<br>105<br>Fuzzy c-Means Algorithm (FCM Algorithm) is a commonly used method of clustering analysis. When there are noise variables in the data, the error rate of the fuzzy c-means algorithm is relatively improved. How to choose the weight of the variable to reduce the error rate is an important issue. Based on this , this paper presents a new method of variable weight selection, called Covariance Matrix (CM) method. The simulation results show that the proposed variable selection method can effectively reduce the error rate of clustering. Finally , the proposed CM method

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Chang, Wei-En, and 張維恩. "Fuzzy model identification by FCM clustering algorithm and fuzzy controller design." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/37147018727277599666.

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碩士<br>大同工學院<br>電機工程研究所<br>87<br>ABSTRACT Fuzzy controllers have been successfully applied in many cases to which conventional control algorithms are difficult to be applied. Recently, it was proven that fuzzy systems are capable of approximating any real continuous function to arbitrary accuracy. This result motivates us to use the fuzzy systems as identifiers for nonlinear dynamic systems, and then design the fuzzy controllers based on the fuzzy system. In the process of the identification, most of the techniques used in the literatures for fuzzy c-mean (FCM) clusterin

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Chung-cheng, Hung, and 洪崇誠. "FGK dynamic compression algorithm support distributed processing implementation of the system." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/03867117635237468496.

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碩士<br>國立交通大學<br>生醫工程研究所<br>99<br>Our aim is to a complex operation, it cut less computation to do processing, and smaller operations in their respective rooms to deal with their own processor to do so without having a single operator can spend the necessary the long time, and we are taking the dynamic compression algorithms to transmit the face of our problems, this algorithm has properties of solutions with the pressure as can be first to come and collect the data after decompression do first processing, can save more time. And we have also taken some ideas network transmission, analog mul

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許傳慧. "Using Suppressed FCM Algorithms to Estimate Parameters of Normal Distribution." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/19354094028129269789.

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碩士<br>國立新竹教育大學<br>數學教育學系碩士班<br>93<br>Using Suppressed FCM Algorithm to Estimate Parameters of Normal Distribution Abstract The fuzzy c-means clustering algorithm（FCM algorithm） is the well known and most powerful method used in cluster analysis. Wu and Yan （2002）proposed a new metric to replace the Euclidean metric in the c-means clustering algorithm, and developed an alternative fuzzy c-means algorithm called AFCM algorithm. In this paper, we also propose another new metric and apply in the c-means clustering algorithm, which is called the Cauchy fuzzy c-means algorithm（CFCM algorithm）.Both a

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SAVLEKAR, DHAIRYA PANKAJ. "STUDY OF FCM WITH VARIOUS OPTIMIZATION ALGORITHMS FOR IMAGE SEGMENTATION." Thesis, 2022. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19224.

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With computer-aided diagnostics, medical pictures are acquired utilizing electronic instruments such as CT scanners and MRI machines. Typically, computed tomography (CT)/magnetic resonance imaging (MRI) pictures obtained are restricted spatial resolution, low contrast, noise, and nonuniform variation because of environmental impacts. As a result, the peculiarities of the objects are fuzzy and twisted, and their meanings are not precise. Fuzzy sets and fuzzy logic are best suited for dealing with ambiguity and uncertainty. For segmentation, the fuzzy clustering approach has been wid

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PENG, SHENG-WEI, and 彭昇煒. "A CAPTCHA Recognition Algorithm Based on Improved FCM with Spatial Constraints and CNN." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/82553v.

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碩士<br>國立臺北科技大學<br>自動化科技研究所<br>107<br>Based on an improved fuzzy C-means clustering with spatial constraints (FCM_S) and convolutional neural networks (CNN), a recognition algorithm for CAPTCHA is proposed in this thesis. First, we adopt the objective function of FCM_S with different penalty parameters which can control the effect of the penalty and the mean of the neighbors for each pixel within a specified window to obtain an optimal segmentation of image. Therefore, in this thesis, the Euclidean distance of the neighbors for each pixel within a specified window modify the penalty parameter i

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