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Dissertations / Theses on the topic 'Inverse linear model'

Author: Grafiati

Published: 25 May 2024

Last updated: 19 July 2025

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1

Somacal, Agustin. "Model reduction for forward simulation and inverse problems : towards non-linear approaches." Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS095.

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La réduction de modèle est une technique utilisée pour calculer des approximations rapides et précises des états de systèmes physiques, décrits par des Équations aux Dérivées Partielles (EDP) paramétriques. Dans le cadre classique, un sous-espace linéaire est construit dans une étape offline en utilisant un ensemble de descriptions à haute résolution des états possibles du système d'intérêt. Ensuite, le sous-espace est utilisé pour résoudre rapidement et avec précision des problèmes directes ou inverses. Il est connu que ces stratégies peuvent bien approximer la solution des EDP elliptiques av

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2

Goudenege, Guillaume. "Développement de modèles d'optimisation de flux en logistique inverse : Applications aux contenants réutilisables." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2013. http://www.theses.fr/2013ECAP0014.

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Dans un monde industriel marqué par un contexte économique difficile, les entreprises se doivent d’étudier toutes les possibilités de réduction de coûts et d’optimisation de leur chaîne logistique. Un des champs récents d’optimisation développé dans la littérature concerne le concept de logistique inverse. Cette logistique représente la gestion des flux traversant une chaîne logistique dans le sens inverse des flux traditionnels. On y retrouve des activités liées au recyclage, à la réparation ou encore à la réutilisation de produits. Au sein de la Chaire Supply Chain, nous nous sommes donc int

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3

Rivers, Derick Lorenzo. "Dynamic Bayesian Approaches to the Statistical Calibration Problem." VCU Scholars Compass, 2014. http://scholarscompass.vcu.edu/etd/3599.

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The problem of statistical calibration of a measuring instrument can be framed both in a statistical context as well as in an engineering context. In the first, the problem is dealt with by distinguishing between the "classical" approach and the "inverse" regression approach. Both of these models are static models and are used to estimate "exact" measurements from measurements that are affected by error. In the engineering context, the variables of interest are considered to be taken at the time at which you observe the measurement. The Bayesian time series analysis method of Dynamic Linear Mo

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4

Marchand, Basile. "Assimilation de données et recalage rapide de modèles mécaniques complexes." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLN053/document.

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Depuis plusieurs années, les évolutions considérables survenues au niveau des moyens de calcul à disposition ont entraîné de nouvelles pratiques de simulation des structures mécaniques. Parmi ces nouvelles pratiques celle qui motive ces travaux de thèse est le paradigme Dynamic Data Driven Application Systems (DDDAS). L’idée fondatrice de cette approche est de mettre en place un dialogue entre un système physique et son modèle numérique. L’objectif est alors de (i) permettre un recalage du modèle numérique à l’aide de mesures faites sur le système physique ; (ii) contrôler l’évolution du systè

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5

Rosecký, Martin. "Aplikace pokročilých regresních modelů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-382274.

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This thesis summarizes latest findings about municipal solid waste (MSW) modelling. These are used to solve multivariable version of inverse prediction problem. It is not possible to solve such problem analytically, so heuristic framework using regression models and data reconciliation was developed. As a side product, models for MSW modelling using PCA (Principal Component Analysis) and LM (Linear Model) were created. These were compared with heuristic model called RF (Random Forest). Both of these models were also used for per capita MSW modelling. Theoretical parts about generalized linear

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6

Granier, Bernard. "Restauration d'images perturbees par la turbulence atmospherique." Paris 11, 1996. http://www.theses.fr/1996PA112496.

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Une image observee est modelisee comme la convolution d'un noyau de flou du a la turbulence atmospherique par une image originale, a laquelle est ajoutee un bruit d'acquisition. L'objectif de notre etude est la mise en uvre d'une methode de restauration dont la complexite numerique est independante de la taille du noyau de perturbation. Nous proposons une methode de restauration en deux etapes: la premiere etant un filtrage de moindres carres faiblement regularise, la seconde un filtrage markovien. Nous etudions les methodes de deconvolution de moindres carres en proposant une technique de com

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7

Fontinele, Humberto Ãcaro Pinto. "Local models for inverse kinematics approximation of redundant robots: a performance comparison." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=16727.

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nÃo hÃ<br>In this dissertation it is reported the results of a comprehensive comparative study involving six local models applied to the task of learning the inverse kinematics of three redundant robotic arm (planar, PUMA 560 and Motoman HP6). The evaluated algorithms are the following ones: radial basis functions network (RBFN), local model network (LMN), SOMbased local linear mapping (LLM), local linear mapping over k-winners (K-SOM), local weighted regression (LWR) and counter propagation (CP). Each algorithm is evaluated with respect to its accuracy in estimating the joint angles given the

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Heijden, Luuk van der. "Determination of the food sources and of the role of meiofauna in soft-bottom intertidal habitats of the Marennes-Oléron Bay, France, and the Sylt-Rømø Bight, Germany : importance of the microphytobenthos-meiofauna pathway, highlighted by community structure, trophic markers and linear inverse food web models." Thesis, La Rochelle, 2018. http://www.theses.fr/2018LAROS030/document.

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La méiofaune joue un rôle important dans le fonctionnement des habitats benthiques à substrat meuble (ex. flux de matière) en relation avec sa production élevée, sa position trophique intermédiaire et les importants transferts d’énergie vers les niveaux trophiques supérieurs qui y sont lié. Les relations trophiques et les flux de matière organique liés à la méiofaune restent néanmoins mal connus ou peu pris en compte. Afin de mieux appréhender le rôle de la méiofaune, la structure des communautés et les relations trophiques entre les sources de nourriture et ces consommateurs ont été déterminé

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9

Greiner, Eric. "Mise en oeuvre de méthodes de contrôle optimal pour l'assimilation de données in situ et satellitaires dans les modèles océaniques." Paris 6, 1993. http://www.theses.fr/1993PA066108.

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L'etude porte sur la resolution de problemes de moindres carres non lineaires rencontres dans le domaine des ecoulements oceaniques a grande echelle. L'originalite de ce travail reside dans l'approche qui est faite par la methode du controle optimal plutot que par une technique statistique. Cette methode consiste a minimiser une fonctionnelle correspondant au probleme de moindre carre etudie, le minimum de cette optimisation etant une solution du probleme. Lors des applications numeriques, le gradient de cette fonctionnelle n'est pas calcule par differences finies mais a l'aide du modele adjoi

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10

Sandberg, Henrik. "Linear Time-Varying Systems: Modeling and Reduction." Licentiate thesis, Lund University, Department of Automatic Control, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-74720.

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Linear time-invariant models are widely used in the control community. They often serve as approximations of nonlinear systems. For control purposes linear approximations are often good enough since feedback control systems are inherently robust to model errors. In this thesis some of the possibilities for linear time-varying modeling are studied. In the thesis it is shown that the balanced truncation procedure can be applied to reduce the order of linear time-varying systems. Many of the attractive properties of balanced truncation for time-invariant systems can be generalized into the time-v

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11

Brady, Kaitlyn. "Learning Curves in Emergency Ultrasonography." Digital WPI, 2012. https://digitalcommons.wpi.edu/etd-theses/1150.

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"This project utilized generalized estimating equations and general linear modeling to model learning curves for sonographer performance in emergency ultrasonography. Performance was measured in two ways: image quality (interpretable vs. possible hindrance in interpretation) and agreement of findings between the sonographer and an expert reviewing sonographer. Records from 109 sonographers were split into two data sets-- training (n=50) and testing (n=59)--to conduct exploratory analysis and fit the final models for analysis, respectively. We determined that the number of scans of a particular

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12

Jebri, Beyrem. "Attribution et reconstruction du rôle de la variabilité interne et des forçages externes sur le climat passé récent et du dernier millénaire." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS162.

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Nous avons d’abord étudié les rôles de la variabilité interne (telle que l’IPO) et des forçages externes dans le refroidissement régional dans la zone d’upwelling du Pérou-Chili et les mécanismes associés. Les résultats montrent que l’expansion de la cellule de Hadley dans l’hémisphère Sud en réponse aux forçages anthropiques est un résultat robuste dans nos grands ensembles d’attribution du modèle IPSL-CM5A et les observations et est responsable de l’intensification de l’upwelling depuis les années 80s. Celle-ci se traduit par une intensification des alizés et de l’upwelling le long des côtes

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13

Sládek, Vojtěch. "Energetický model lineární osy s kuličkovým šroubem a servopohonem." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-401055.

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The aim of the thesis was to study the Energy Models of Linear Axes with Ball Screws and Servo Drives, to analyze the individual parts of the axis with respect to losses, the methodology of calculating the losses on the electrical part and the mechanical part of the drive and creating a complex algorithm that calculates the energy consumed for the specified motion. The thesis is divided into a theoretical and practical part, where the theoretical part is divided into the treatise on the electrical part of the axis and its losses and the part that deals with the mechanical part and its losses.

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14

Ortega, Felix Mauricio Escalante. "Filtragem e controle recursivos robustos aplicados em um pêndulo invertido." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-15092016-075814/.

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O estudo da estabilidade e desempenho em sistemas de controle é um tópico relevante na teoria de sistemas. Quando são assumidas incertezas no modelo da planta, existe uma maior dificuldade para garantir um nível de desempenho adequado do sistema dinâmico e a estabilidade pode ser comprometida. Neste trabalho são utilizados um regulador linear quadrático robusto e um filtro de Kalman robusto combinados em uma única formulação para tratar de sistemas dinâmicos incertos em tempo real. O caso de estudo selecionado é o pêndulo invertido. Seus principais desafios de controle encontrados na literatur

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15

Soto, Zuluaga Juan Pablo. "Reverse logistics: models and applications." Doctoral thesis, Universitat Pompeu Fabra, 2006. http://hdl.handle.net/10803/7338.

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En los últimos años la Logística Inversa se ha hecho relevante no solo para el mundo académico sino también para el empresarial. Las empresas dan cada día más importancia a esta área, debido a los factores medioambientales y a los beneficios derivados del mejoramiento de su proceso de devoluciones. Así mismo, para tener unos procesos de Logística Inversa eficientes y exitosos, es necesaria la colaboración entre los miembros de la cadena de suministro. Esta tesis se concentra en ambos aspectos, Colaboración y Logística Inversa.<br/>El propósito de esta tesis es doble; primero, analizar los pr

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16

Coguenanff, Corentin. "Conception robuste aux incertitudes des systèmes légers bois envibro-acoustique linéaire." Thesis, Paris Est, 2015. http://www.theses.fr/2015PESC1166/document.

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La compréhension et la prédiction du comportement vibro-acoustique des systèmes légers bois du bâtiment constitue un enjeu scientifique d'actualité. En 2015 une étude montrait encore que presque la moitié de ces systèmes constructifs n'offrait pas satisfaction. Un modèle prédictif à l'échelle du bâtiment, en cours de normalisation, permet de prendre en compte la performance individuelle des différents systèmes séparatifs pour remonter à un niveau de performance globale. La difficulté scientifique réside alors dans l'évaluation de la performance individuelle associée à chaque conception admissi

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17

Moreno, Betancur Margarita. "Regression modeling with missing outcomes : competing risks and longitudinal data." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA11T076/document.

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Les données manquantes sont fréquentes dans les études médicales. Dans les modèles de régression, les réponses manquantes limitent notre capacité à faire des inférences sur les effets des covariables décrivant la distribution de la totalité des réponses prévues sur laquelle porte l'intérêt médical. Outre la perte de précision, toute inférence statistique requière qu'une hypothèse sur le mécanisme de manquement soit vérifiée. Rubin (1976, Biometrika, 63:581-592) a appelé le mécanisme de manquement MAR (pour les sigles en anglais de « manquant au hasard ») si la probabilité qu'une réponse soit m

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18

Wikström, Gunilla. "Computation of Parameters in some Mathematical Models." Doctoral thesis, Umeå University, Computing Science, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-565.

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<p>In computational science it is common to describe dynamic systems by mathematical models in forms of differential or integral equations. These models may contain parameters that have to be computed for the model to be complete. For the special type of ordinary differential equations studied in this thesis, the resulting parameter estimation problem is a separable nonlinear least squares problem with equality constraints. This problem can be solved by iteration, but due to complicated computations of derivatives and the existence of several local minima, so called short-cut methods may be an

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19

Slabý, Vít. "Návrh a realizace demonstračního modelu dvojítého kyvadla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-378727.

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This thesis describes the process of rebuilding an experimental model of a single pendulum on a cart into the double pendulum on a cart. The control algorithm in MATLAB/Simulink environment for stabilization of the pendulum in the inverse position is designed. For this purpose, LQR state feedback control was implemented. Also method for swinging the pendulum into inverse position from stable state (swing-up) was designed. Feedforward method was utilised for swing-up control. In the thesis, functionality of these algorithms is shown.

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20

Heijden, Luuk van der [Verfasser]. "Determination of the food sources and of the role of meiofauna in soft-bottom intertidal habitats of the Marennes-Oléron Bay, France, and the Sylt-Rømø Bight, Germany. Importance of the microphytobenthos-meiofauna pathway, highlighted by community structure, trophic markers and linear inverse food web models. / Luuk van der Heijden." Kiel : Universitätsbibliothek Kiel, 2019. http://d-nb.info/1191179826/34.

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21

Henriques, Rafael Oliveira. "Mathematical model to reconstruct the mechanical properties of an elastic medium." Master's thesis, 2020. http://hdl.handle.net/10316/93596.

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Dissertação de Mestrado em Matemática apresentada à Faculdade de Ciências e Tecnologia<br>Neste trabalho investigamos o modelo matemático para a reconstrução das propriedades mecânicas de um meio elástico. Com esse objectivo, nós desenvolvemos o modelo matemático para as deformações mecânicas assumindo que os parâmetros que definem as propriedades mecânicas de o meio são conhecidos. O modelo é baseado em equações de elasticidade linear em tempo harmónico. A solução numérica é obtida usando a discretização de elementos finitos em um domínio tridimensional. O desempenho do método é ilustrado com

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22

Lahiri, Soumi. "Linear and log-linear models based on generalized inverse sampling scheme." Thesis, 2006. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2006-078.

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23

Liu, Yidong. "Joint inversion for correlated models in linear inverse problems." Thesis, 1994. http://hdl.handle.net/2429/3495.

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Inverse problems arise in many fields. They are usually ill-posed since they often violate one or more of Hadmard's three conditions for well-posedness: existence, uniqueness and stability. In this thesis, we propose a new method for computing approximate solutions in certain linear inverse problems. We consider linear inverse problems based on integral equations of the first kind. Analysis of Picard's condition reveals that such equations may lead to ill-posed problems which may have no solution satisfying the observed data exactly and stably, but may have infinitely many solutions sat

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Jun-XueChen and 陳俊學. "Monitoring the Non-linear Profile Data using Inverse Gaussian process Models." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/m3uae2.

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25

"A computer programme in linear models." Chinese University of Hong Kong, 1988. http://library.cuhk.edu.hk/record=b5885963.

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"Analyzing Taguchi's experiments using GLIM with inverse Gaussian distribution." Chinese University of Hong Kong, 1994. http://library.cuhk.edu.hk/record=b5888159.

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by Wong Kwok Keung.<br>Thesis (M.Phil.)--Chinese University of Hong Kong, 1994.<br>Includes bibliographical references (leaves 50-52).<br>Chapter 1. --- Introduction --- p.1<br>Chapter 2. --- Taguchi's methodology in design of experiments --- p.3<br>Chapter 2.1 --- System design<br>Chapter 2.2 --- Parameter design<br>Chapter 2.3 --- Tolerance design<br>Chapter 3. --- Inverse Gaussian distribution --- p.8<br>Chapter 3.1 --- Genesis<br>Chapter 3.2 --- Probability density function<br>Chapter 3.3 --- Estimation of parameters<br>Chapter 3.4 --- Applications<br>Chapter 4. --- Iterative procedures

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27

Chung, Jui-Chou, and 鍾睿洲. "A Bipedal Locomotion Planning Based on Linear Inverted Pendulum Model with Adopting COM Model Uncertainty." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/27074097669562996960.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>100<br>Linear inverted pendulum model (LPIM) is usually used to generate real-time bipedal locomotion of a humanoid robot because of considering lower computational loads. LIPM uses the operational height of center of mass (CoM) of a biped robot as a primary parameter to generate locomotion trajectory. However, the operational height of CoM is hardly determined because of complicated mechanical structures of biped humanoid robots. Improper operational CoM height setting would induce locomotion stability problems. In addition, extra masses applied on the robot will al

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Hou, Chun-han, and 侯君翰. "Development of a FPGA-based Humanoid Robot Locomotion Controller with Linear Inverted Pendulum Models." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/42905084553290670171.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>102<br>This study presents a field programmable gate array (FPGA) based hardware/software co-design approach to implement a biped locomotion controller for an adult-size humanoid robot. The proposed hardware/software co-design approach is capable of flexibly arranging hardware and software components and modules in systems according to their characteristics to achieve specific application purposes when compared to dedicated microcontroller based solutions. For the software components, this study uses the NIOS II-based system on a programmable chip (SoPC) technique t

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29

Tsai, Cheng-Chuan, and 蔡政銓. "Application of Model Predictive Control to Parallel-Type Double Inverted Pendulum Driven by a Linear Motor." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/28352050969942645459.

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碩士<br>國立成功大學<br>機械工程學系碩博士班<br>94<br>The aim of this paper is to apply Model Predictive Control (MPC) to the Parallel-type Double Inverted Pendulum (PDIP). Control of the PDIP is more difficult among the inverted pendulum family. Because the different lengths of the two pendulums give them distinct natural frequencies and the stoke length is limited. Besides, friction is not homogenously distributed on the track. Please bear in mind that one cannot achieve good performance if only state feedback is used. Therefore, we proposed a cascade structure where the inner loop was formed via state feedba

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30

Yan-TingYe and 葉彥廷. "Design and Implementation of Gait Pattern Generation by Improved Linear Inverted Pendulum Model for Teen-Sized Humanoid Robot." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/xb7582.

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碩士<br>國立成功大學<br>電機工程學系<br>103<br>Design of a teen-sized humanoid robot David Junior and its stable gait pattern generation are proposed in this thesis. First, the system architecture and the design concept of enhanced mechanism are introduced. Second, the Linear Inverted Pendulum Model (LIPM) theory is used for gait pattern generation. Conventional LIPM is assumed that the mass of legs should be much less than the mass of the upper body, the mass of legs is neglected to simplify the model. However, it causes the conflict between LIPM and real models of most current humanoid robots. Hence, this

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Arun, Rahul S. "Investigations on Hybrid Multilevel Inverters with a Single DC Supply for Zero and Reduced Common Mode Voltage Operation and Extended Linear Modulation Range Operation for Induction Motor Drives." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/2946.

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Multilevel inverters play a major role in the modern day medium and high power energy conversion processes. The classic two level voltage source inverter generates PWM pole voltage output having two levels with strong fundamental component and harmonics centered around the switching frequency and its multiples. With higher switching frequency, its components can be easily filtered and results in better Total harmonic distortion (THD) output voltage and current. But with higher switching frequency, switching loss of power devices increases and electromagnetic interferences also increases. Also

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Arun, Rahul S. "Investigations on Hybrid Multilevel Inverters with a Single DC Supply for Zero and Reduced Common Mode Voltage Operation and Extended Linear Modulation Range Operation for Induction Motor Drives." Thesis, 2016. http://hdl.handle.net/2005/2946.

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Multilevel inverters play a major role in the modern day medium and high power energy conversion processes. The classic two level voltage source inverter generates PWM pole voltage output having two levels with strong fundamental component and harmonics centered around the switching frequency and its multiples. With higher switching frequency, its components can be easily filtered and results in better Total harmonic distortion (THD) output voltage and current. But with higher switching frequency, switching loss of power devices increases and electromagnetic interferences also increases. Also

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33

Scoleri, Tony. "Fundamental numerical schemes for parameter estimation in computer vision." 2008. http://hdl.handle.net/2440/50726.

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An important research area in computer vision is parameter estimation. Given a mathematical model and a sample of image measurement data, key parameters are sought to encapsulate geometric properties of a relevant entity. An optimisation problem is often formulated in order to find these parameters. This thesis presents an elaboration of fundamental numerical algorithms for estimating parameters of multi-objective models of importance in computer vision applications. The work examines ways to solve unconstrained and constrained minimisation problems from the view points of theory, computationa

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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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