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Dissertations / Theses on the topic 'Component mode synthesis'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Troeng, Tor. "Frequency Response Analysis using Component Mode Synthesis." Thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-37809.

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Solutions to physical problems described by Differential Equationson complex domains are in except for special cases almost impossibleto find. This turns our interest toward numerical approaches. Sincethe size of the numerical models tends to be very large when handlingcomplex problems, the area of model reduction is always a hot topic. Inthis report we look into a model reduction method called ComponentMode Synthesis. This can be described as dividing a large and complexdomain into smaller and more manageable ones. On each of thesesubdomains, we solve an eigenvalue problem and use the eigenve

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2

Soucy, Yvan. "Test-based hybrid component mode synthesis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0014/NQ37056.pdf.

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3

Blackwood, Gary H. (Gary Howard). "Experimental component mode synthesis of structures with joint freeplay." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/37486.

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4

Petersen, Lynn James. "Mast-antenna survivability : structural dynamic design analysis by component mode synthesis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA280669.

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5

Zoet, Petrus Gosse. "Component mode synthesis for ship structures : investigation into an alternative approach." Thesis, University of Strathclyde, 2013. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=24881.

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The main aim of this work is to help the shipbuilder to effectively assess a ships' structural design for its vibratory behaviour. For that purpose state of the art structural modelling techniques are reviewed for the validity of their basic principles, accuracy, practicality and required computation time when applied on typical marine structures. Full finite element modelling has been applied on a part of the structure of an LNG carrier on board which the author has taken vibration and noise measurements. Also fixed interface (Craig-Bampton) and free interface (Rubin's method) component mode

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6

Abdallah, Ayman Ahmed. "Dynamic substructuring by the boundary flexibility vector method of component mode synthesis." Case Western Reserve University School of Graduate Studies / OhioLINK, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=case1054567783.

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7

Ramani, Anand. "Two-step Component Mode Synthesis with convergence for the eigensolution of large-degree-of-freedom systems." Diss., Virginia Tech, 1996. http://hdl.handle.net/10919/39162.

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8

Beck, Joseph A. "Stochastic Mistuning Simulation of Integrally Bladed Rotors using Nominal and Non-Nominal Component Mode Synthesis Methods." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1278600105.

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9

Lindberg, Eskil. "A Vibro-Acoustic Study of Vehicle Suspension Systems : Experimental and Mathematical Component Approaches." Doctoral thesis, KTH, MWL Strukturakustik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-121575.

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The objective of the present work is to study the vehicle suspension as a vibro-acoustic system of high complexity, consisting of many sub-systems with fundamentally different acoustical properties. In a parallel numerical and experimental modelling effort, important contributions to the understanding of its behaviour have been achieved. These findings are based on a balance between component investigations and global modelling of the complete system; they have been formulated for the transmission of both tyre-road excitation and friction-induced vibrations in the brake system. Initially an ex

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10

Zhou, Changwei. "Approche couplée propagative et modale pour l'analyse multi-échelle des structures périodiques." Thesis, Ecully, Ecole centrale de Lyon, 2014. http://www.theses.fr/2014ECDL0040/document.

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La dynamique d’une structure peut être vue aussi bien en termes de modes (ondes stationnaires) qu’en termes d’ondes élastiques libres. Les approches modales sont largement utilisées en mécanique et de nombreuses techniques de réduction de modèles (Model Order Reduction - MOR) ont été développées dans ce cadre. Quant à la dynamique des structures périodiques, les approches propagatives sont majoritairement utilisées, où la périodicité est exploitée en utilisant la théorie de Bloch. Pour les structures périodiques complexes, plusieurs techniques MOR sur la base d’onde ont été proposées dans la l

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11

Lindberg, Eskil. "Vehicle Disc Brake Roughness Noise : Experimental Study of the Interior Noise andVibro-Acoustic Modelling of Suspension Systems." Licentiate thesis, KTH, MWL Strukturakustik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-39554.

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Prediction of vehicle disc brake roughness noise is a non-trivial challenge. In fact, neither the source mechanisms, nor the transfer paths are so far well understood. Traditionally, disc brake noise problems are studied as part of the friction-induced noise field, where the source is considered to be a more or less local phenomenon related to the brake disc and brake pad. However, for the roughness noise of interest here this viewpoint is not adequate when attempting to solve the interior noise problem since the transfer of vibro-energy from the brake into the vehicle body is a crucial aspect

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12

Joannin, Colas. "Réduction de modèle par sous-structuration et modes non-linéaires : Application à la dynamique des roues aubagées." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEC014/document.

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Le désaccordage des roues aubagées est une thématique de recherche d’un intérêt tout particulier pour l’industrie aéronautique, en recherche constante d’outils de calcul toujours plus prédictifs et performants pour répondre aux exigences croissantes des organismes de certification. Si le phénomène est aujourd’hui relativement bien maîtrisé dans un cadre linéaire, la prise en compte des non-linéarités dans l’étude du désaccordage reste encore problématique, notamment en raison du manque de méthode adaptée pour mener ce type d’analyses sur des modèles industriels. L’objectif principal de ce trav

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13

Ribaric, Adrijan Petar. "Orientation Invariant Characteristics of Deformable Bodies in Multibody Dynamics." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/238644.

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In multibody systems, mechanical components (bodies) can be assumed rigid (non-deformable), if their deformation is negligible. For components with non-negligible deformations several methods were developed to represent their deformation. The most widely used method is the floating frame of reference. In this formulation the deformable body is represented by a finite element model whose deformation is described with respect to a local body-fixed frame. Unfortunately, finite element models can include many degrees-of-freedom, which stand in contradiction to the requirements of multibody dyn

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14

Orbay, Gunay. "Nonlinear Vibration Of Mistuned Bladed Disk Assemblies." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609740/index.pdf.

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High cycle fatigue (HCF) failure has been studied extensively over the last two decades. Its impact on jet engines is severe enough that may result in engine losses and even life losses. The main requirement for fatigue life predictions is the stress caused by mechanical vibrations. One of the factors which have major impact on the vibratory stresses of bladed disk assemblies is a phenomenon called &ldquo<br>mistuning&rdquo<br>which is defined as the vibration localization caused by the loss of cyclic periodicity which is a consequence of inter&amp<br>#8208<br>blade variations in structural pr

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15

Beck, Joseph A. "Fundamental Understanding of Blisk Analytical Response." Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1367848915.

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16

Rumpler, Romain. "Efficient finite element approach for structural-acoustic applicationns including 3D modelling of sound absorbing porous materials." Phd thesis, Conservatoire national des arts et metiers - CNAM, 2012. http://tel.archives-ouvertes.fr/tel-00726915.

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In the context of interior noise reduction, the present work aims at proposing Finite Element (FE) solution strategies for interior structural-acoustic applications including 3D modelling of homogeneous and isotropic poroelastic materials, under timeharmonic excitations, and in the low frequency range. A model based on the Biot-Allard theory is used for the poroelastic materials, which is known to be very costly in terms of computational resources. Reduced models offer the possibility to enhance the resolution of such complex problems. However, their applicability to porous materials remained

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17

Menday, M. T. "Multi-body dynamics analysis and experimental investigations for the determination of the physics of drive train vibro-impact induced elasto-acoustic coupling." Thesis, Loughborough University, 2003. https://dspace.lboro.ac.uk/2134/20789.

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A very short and disagreeable audible and tactile response from a vehicle driveline may be excited when the throttle is abruptly applied or released, or when the clutch is rapidly engaged. The condition is most noticeable in low gear and in slow moving traffic, when other background engine and road noise levels are low. This phenomenon is known as clonk and is often associated with the first cycle of shuffle response, which is a low frequency longitudinal vehicle movement excited by throttle demand. It is often reported that clonk may coincide with each cycle of the shuffle response, and multi

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18

Brown, Jeffrey M. "Reduced Order Modeling Methods for Turbomachinery Design." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1229962254.

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19

Bourmich, Sophie. "Optimisation de la qualité vibro-acoustique des structures d'automobiles pour les basses fréquences." Thesis, Ecully, Ecole centrale de Lyon, 2012. http://www.theses.fr/2012ECDL0026/document.

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Les modèles d'éléments finis des automobiles donnent des grandes tailles de problèmes matriciels, ce qui demeure coûteux en ressources numériques pour une procédure d'optimisation. La multiplicité des phénomènes couplés du problème d'interaction de l'air de l'habitacle et de la superstructure rend plus sensible, à des variations mineures des paramètres, une optimisation directe du véhicule. Pour réduire les temps de calculs et l'espace mémoire liés à la simulation numérique en éléments finis, une méthode de double synthèse modale est appliquée sur la structure et le fluide. Ceci permet de dimi

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20

Rumpler, Romain. "Efficient Finite Element Approach for Structural-Acoustic Applications including 3D modelling of Sound Absorbing Porous Materials." Doctoral thesis, KTH, MWL Numerisk akustik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-90335.

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In the context of interior noise reduction, the present work aims at proposing Finite Element (FE) solution strategies for interior structural-acoustic applications including 3D modelling of homogeneous and isotropic poroelastic materials, under timeharmonic excitations, and in the low frequency range. A model based on the Biot-Allard theory is used for the poroelastic materials, which is known to be very costly in terms of computational resources. Reduced models offer the possibility to enhance the resolution of such complex problems. However, their applicability to porous materials remained

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21

Mahieux, Bruno. "Contribution à l'optimisation en masse de structures complexes sous contraintes vibratoires : application à la conception des planches de bord en phase d'études préliminaires." Valenciennes, 1996. http://www.theses.fr/1996VALE0031.

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Dans le cadre de la conception des planches de bord en phase d'études préliminaires, nous proposons une stratégie d'optimisation permettant de réaliser des gains en masse rapidement à partir d'un cahier des charges. Ce cahier des charges comprend en particulier des critères vibratoires. En fonction des besoins d'études ainsi que des caractéristiques d'une planche de bord, la stratégie développée fait appel à une utilisation conjointe des techniques de sous-structuration et d'optimisation. Elle consiste à optimiser séparément les éléments (ou sous-structures) modifiables. Pour cela, nous étudio

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22

Kšica, Filip. "Modelování dynamických vlastností a chování technických soustav." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241945.

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The aim of this diploma thesis is to evaluate the potential of available methods for simplification and reduction of complex models of technical systems and their integration with experimental models. Finding methods, which would allow us to create models and run simulations in shorter periods of time, is key in design process of modern technical systems. In the beginning of this thesis, a theory necessary for understanding and application of presented methods is given. These methods can be separated into two groups, first as experiment related, second as simulation related. The first group co

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23

Covi, Patrick. "Multi-hazard analysis of steel structures subjected to fire following earthquake." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/313383.

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Fires following earthquake (FFE) have historically produced enormous post-earthquake damage and losses in terms of lives, buildings and economic costs, like the San Francisco earthquake (1906), the Kobe earthquake (1995), the Turkey earthquake (2011), the Tohoku earthquake (2011) and the Christchurch earthquakes (2011). The structural fire performance can worsen significantly because the fire acts on a structure damaged by the seismic event. On these premises, the purpose of this work is the investigation of the experimental and numerical response of structural and non-structural components o

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24

Stark, Richard B. "Synthetic image generator model : application of specular and diffuse reflectivity components and performance evaluation in the visible region /." Online version of thesis, 1993. http://hdl.handle.net/1850/11883.

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25

Covi, Patrick. "Multi-hazard analysis of steel structures subjected to fire following earthquake." Doctoral thesis, Università degli studi di Trento, 2021. http://hdl.handle.net/11572/313383.

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Fires following earthquake (FFE) have historically produced enormous post-earthquake damage and losses in terms of lives, buildings and economic costs, like the San Francisco earthquake (1906), the Kobe earthquake (1995), the Turkey earthquake (2011), the Tohoku earthquake (2011) and the Christchurch earthquakes (2011). The structural fire performance can worsen significantly because the fire acts on a structure damaged by the seismic event. On these premises, the purpose of this work is the investigation of the experimental and numerical response of structural and non-structural components o

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26

Tzu-ChiChiu and 邱子齊. "Application of ANSYS in Component Mode Synthesis." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/72631277124771399032.

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27

Du-ChingTsai and 蔡篤慶. "Dynamic Analysis of Structures Using Component Mode Synthesis." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/91706828919329978917.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>98<br>Conventional finite-element analysis may encounter the problem of insufficient computational resources especially when the structure system under consideration is very large and complex. This paper discusses the application of component mode synthesis for the dynamic analysis of structures. This method is that divides the structure into several components, reduces the component mode, keeps the important modes and compensation modes, and then assembles a reduced-order model of the entire structure. The critical problems lie in how to appropriately select

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28

Yu-ChengTang and 湯育澄. "Application of the Method of Pseudo Mode Shape in Component Mode Synthesis." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/d4j8t9.

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碩士<br>國立成功大學<br>航空太空工程學系<br>107<br>Conventional finite-element analysis may encounter the problem of insufficient computational resources especially when the structure system under consideration is large and complex. In order to reduce the model order of a system, Component Mode Synthesis is one of the reduction methods, which can make the structure system be divided into several components according to the features. Further finite element modeling or modal test analysis is performed on each component, and then these components are integrated into an approximate overall structural model. Howev

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29

Amini, Aliakbar A. "Parametric study of rotor-bearing-pedestal system using component mode synthesis." Thesis, 1990. http://spectrum.library.concordia.ca/3867/1/ML56076.pdf.

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30

Muravyov, Alexander. "Analysis of damped linear dynamic systems and application of component mode synthesis." Thesis, 1994. http://hdl.handle.net/2429/5087.

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The analysis of nongyroscopic damped (viscous) linear dynamic systems is presented. Discrete systems having symmetric mass, stiffness and damping matrices are considered. Discretization of the systems is accomplished by application of the finite element proce dure. The general case of classically damped systems is considered, and the necessary and sufficient condition for classical damping is given. For a system of this type, it is possible to specify the damping matrix that will result in each mode having either a prescribed decay factor or a damped eigenfrequency. This may be accompli

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31

Chen, Hong-kai, and 陳弘凱. "Component Mode Synthesis Method on the Dynamic Characteristics of Shrouded Turbo Blades." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32319900613054458175.

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碩士<br>國立中山大學<br>機械與機電工程學系研究所<br>99<br>The dynamic characteristics of shroud blade group played a significant role in steam turbine design. However, the complex shape and periodical structure of shroud blades make it so hard to find its dynamic characteristics under high speed operation. The complicate shape, periodic structure, and tedious computation limit the application of finite element method in the design analysis of shroud group blades. In order to design the shroud blade group, the component mode synthesis method was employed to derive the system dynamic equation of the grouped periodi

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32

Smith, Malcolm J. "An evaluation of component mode synthesis for modal analysis of finite element models." Thesis, 1993. http://hdl.handle.net/2429/2256.

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Component mode synthesis (CMS) is a condensation method for vibration analysis which preserves the low frequency vibrational characteristics of a structure. In this method, the structure is treated as an assemblage of components whose displacements are described in terms of component modes. These modes may be some combination of static response, free vibration, or rigid body displacements of a component. In this thesis, the component mode sets used by other researchers are reviewed with a view to establishing which is most suitable for large-order finite element models. Two component mode sets

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33

HE, CHUAN-REN, and 何傳仁. "A study on the dynamic characteristics of heat exchanger tube by component mode synthesis method." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/46164086545783619291.

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34

Lavelle, Francis M. III. "A Lanczos component mode synthesis algorithm for locally nonlinear systems with applications to seismic structural pounding." Thesis, 1991. http://hdl.handle.net/1911/16459.

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A Component Mode Synthesis (CMS) algorithm employing load dependent Lanczos vectors is presented. The proposed algorithm yields a sparse set of reduced system equations and is an efficient method for computing the forced vibration response of multi-component and/or locally nonlinear dynamic systems. The beneficial aspects of traditional CMS methods employing fixed interface component normal modes and the computational advantages of load dependent Ritz/Lanczos vectors are combined in the new algorithm. By exploiting the tridiagonal property of Lanczos vectors, the system equations are nearly as

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35

WANG, GING-GUO, and 汪清國. "The elastodynamic analysis and the component mode synthesis of high-speed flexible robot manipulators with mechanical joints." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/73934655633318387261.

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36

James, Stephen M. "Adapting a Beam-Based Rotordynamics Model to Accept a General Three-Dimensional Finite-Element Casing Model." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7967.

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The subject of this thesis is an extension of a two-dimensional, axisymmetric, Timoshenko-beam finite-element rotordynamic code to include a three-dimensional non-axisymmetric solid-element casing model. Axisymmetric beams are sufficient to model rotors. Spring and damper forces provide the interface between the rotor and its casing and capture the dynamics of the full model. However, axisymmetric beams limit the modeling of real-case machine structures, where the casing is not axisymmetric. Axisymmetric and non-axisymmetric 3D finite element casing structures are modeled. These structures are

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37

Vasilescu, M. Alex O. "A Multilinear (Tensor) Algebraic Framework for Computer Graphics, Computer Vision and Machine Learning." Thesis, 2012. http://hdl.handle.net/1807/65327.

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This thesis introduces a multilinear algebraic framework for computer graphics, computer vision, and machine learning, particularly for the fundamental purposes of image synthesis, analysis, and recognition. Natural images result from the multifactor interaction between the imaging process, the scene illumination, and the scene geometry. We assert that a principled mathematical approach to disentangling and explicitly representing these causal factors, which are essential to image formation, is through numerical multilinear algebra, the algebra of higher-order tensors. Our new image modeling

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38

Liu, Pin-Cheng, and 劉品呈. "A Generic Component-Based Model Synthesis Technique." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/07331327362045563372.

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碩士<br>國立勤益科技大學<br>電子工程系<br>103<br>In this paper, we have proposed a component-based 3D model synthesis system. In the new system, the user is able to design a new model by assembling available mesh components from two or more models. Such technique is often applied to increase the variation of a type of object for a large population. With our technique, we may create characters such as the legendary Minotaur, centaur, mermaid, as well as some illusionary figures in science fictions, movies, or computer games.

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Simone, Panconi. "Ottimizzazione della dinamica e del comfort di sistemi ferroviari e metropolitani di nuova generazione." Doctoral thesis, 2018. http://hdl.handle.net/2158/1127170.

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Il comfort di marcia è una delle caratteristiche dinamiche più importanti per un veicolo ferroviario poiché è direttamente collegato alla percezione di benessere dei passeggeri. Esso dipende da innumerevoli fattori come odori, temperatura e umidità, ma le vibrazioni, che si trasmettono al passeggero attraverso le sospensioni e la cassa, sono riconosciute come le maggiori responsabili di un suo peggioramento e per questo motivo sono considerate come causa principale nel presente lavoro di tesi. Per stimare in maniera precisa gli indici di comfort si utilizza un modello multibody rappresentant

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Bukar, Ali M., Hassan Ugail, and Nosheen Hussain. "On facial age progression based on modified active appearance models with face texture." 2016. http://hdl.handle.net/10454/9481.

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No<br>Age progression that involves the reconstruction of facial appearance with a natural ageing effect has several applications. These include the search for missing people and identification of fugitives. The majority of age progression methods reported in the literature are data driven. Hence, such methods learn from training data and utilise statistical models such as 3D morphable models and active appearance models (AAM). Principal component analysis (PCA) which is a vital part of these models has an unfortunate drawback of averaging out texture details. Therefore, they work as a low pas

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Masamha, Tavengwa. "A Logistic regression analysis model for predicting the success of computer networking projects in Zimbabwe." Thesis, 2020. http://hdl.handle.net/10500/26883.

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Information and communication technology (ICT) greatly influence today’s business processes be it in public or private sectors. Everything that is done in business requires ICT in one way or the other. Research in ICTs is therefore critical. So much research was and is still carried out in projects that develop or enhance ICT but it is still apparent that the success rate of these projects is still very low. The extensive coverage of ICTs implies that if the success rate is still that low, many resources are being wasted in the failed projects; therefore, more research is needed to impro

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