Дисертації з теми "Nonlinear Data processing"
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Park, Joonam. "A visualization system for nonlinear frame analysis." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/19172.
Повний текст джерелаHerrmann, Felix J., Deli Wang, Gilles Hennenfent, and Peyman P. Moghaddam. "Seismic data processing with curvelets: a multiscale and nonlinear approach." Society of Exploration Geophysicists, 2007. http://hdl.handle.net/2429/557.
Повний текст джерелаHerrmann, Felix J. "Seismic data processing with curvelets: a multiscale and nonlinear approach." Society of Exploration Geophysicists, 2007. http://hdl.handle.net/2429/600.
Повний текст джерелаJin, Ruxiang. "Nonlinear etalons and nonlinear waveguides as decision-making elements in photonic switching." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184807.
Повний текст джерелаSvensson, Barbro Christina. "Nonlinear distributed couplers in zinc-sulfide waveguides." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184500.
Повний текст джерелаLakshmanan, Nithya M. "Estimation and control of nonlinear batch processes using multiple linear models." Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/11835.
Повний текст джерелаOgidan, Olugbenga Kayode. "Design of nonlinear networked control for wastewater distributed systems." Thesis, Cape Peninsula University of Technology, 2014. http://hdl.handle.net/20.500.11838/1201.
Повний текст джерелаThis thesis focuses on the design, development and real-time simulation of a robust nonlinear networked control for the dissolved oxygen concentration as part of the wastewater distributed systems. This concept differs from previous methods of wastewater control in the sense that the controller and the wastewater treatment plants are separated by a wide geographical distance and exchange data through a communication medium. The communication network introduced between the controller and the DO process creates imperfections during its operation, as time delays which are an object of investigation in the thesis. Due to the communication network imperfections, new control strategies that take cognisance of the network imperfections in the process of the controller design are needed to provide adequate robustness for the DO process control system. This thesis first investigates the effects of constant and random network induced time delays and the effects of controller parameters on the DO process behaviour with a view to using the obtained information to design an appropriate controller for the networked closed loop system. On the basis of the above information, a Smith predictor delay compensation controller is developed in the thesis to eliminate the deadtime, provide robustness and improve the performance of the DO process. Two approaches are adopted in the design of the Smith predictor compensation scheme. The first is the transfer function approach that allows a linearized model of the DO process to be described in the frequency domain. The second one is the nonlinear linearising approach in the time domain. Simulation results reveal that the developed Smith predictor controllers out-performed the nonlinear linearising controller designed for the DO process without time delays by compensating for the network imperfections and maintaining the DO concentration within a desired acceptable level. The transfer function approach of designing the Smith predictor is found to perform better under small time delays but the performance deteriorates under large time delays and disturbances. It is also found to respond faster than the nonlinear approach. The nonlinear feedback linearisig approach is slower in response time but out-performs the transfer function approach in providing robustness and performance for the DO process under large time delays and disturbances. The developed Smith predictor compensation schemes were later simulated in a real-time platform using LabVIEW. The Smith predictor controllers developed in this thesis can be applied to other process control plants apart from the wastewater plants, where distributed control is required. It can also be applied in the nuclear reactor plants where remote control is required in hazardous conditions. The developed LabVIEW real-time simulation environment would be a valuable tool for researchers and students in the field of control system engineering. Lastly, this thesis would form the basis for further research in the field of distributed wastewater control.
Hernańdez, Correa Evelio. "Control of nonlinear systems using input-output information." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/11176.
Повний текст джерелаHerrmann, Felix J. "Seismic imaging and processing with curvelets." European Association of Geoscientists & Engineers, 2007. http://hdl.handle.net/2429/582.
Повний текст джерелаCereijo, Martinez Maria. "A new parallel technique for the solution of sparse nonlinear equations." FIU Digital Commons, 1994. http://digitalcommons.fiu.edu/etd/2097.
Повний текст джерелаGigioli, George William Jr. "Optimization and tolerancing of nonlinear Fabry Perot etalons for optical computing systems." Diss., The University of Arizona, 1988. http://hdl.handle.net/10150/184537.
Повний текст джерелаChan, Mun Fong. "Nonlinear finite element analysis of sheet pile interlocks." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54482.
Повний текст джерелаPh. D.
Sinha, Anurag R. "Optimization of a new digital image compression algorithm based on nonlinear dynamical systems /." Online version of thesis, 2008. http://hdl.handle.net/1850/5544.
Повний текст джерелаMesquita, Luis Clemente. "Structural optimization for control of stiffened laminated composite plates using nonlinear mixed integer programming." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/52309.
Повний текст джерелаPh. D.
Ha, Jin-cheol. "Real-time visual tracking using image processing and filtering methods." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/28177.
Повний текст джерелаCommittee Chair: Eric N. Johnson; Committee Co-Chair: Allen R. Tannenbaum; Committee Member: Anthony J. Calise; Committee Member: Eric Feron; Committee Member: Patricio A. Vela.
Altintas, Suleyman Serkan. "Attenuation Relationship For Peak Ground Velocity Based On Strong Ground Motion Data Recorded In Turkey." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12608067/index.pdf.
Повний текст джерелаScholz, Matthias. "Approaches to analyse and interpret biological profile data." Phd thesis, [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980988799.
Повний текст джерелаLorenz, Haik. "Texturierung und Visualisierung virtueller 3D-Stadtmodelle." Phd thesis, Universität Potsdam, 2011. http://opus.kobv.de/ubp/volltexte/2011/5387/.
Повний текст джерелаThis thesis concentrates on virtual 3D city models that digitally encode objects, phenomena, and processes in urban environments. Such models have become core elements of geographic information systems and constitute a major component of geovirtual 3D worlds. Expert users make use of virtual 3D city models in various application domains, such as urban planning, radio-network planning, and noise immision simulation. Regular users utilize virtual 3D city models in domains, such as tourism, and entertainment. They intuitively explore photorealistic virtual 3D city models through mainstream applications such as GoogleEarth, which additionally enable users to extend virtual 3D city models by custom 3D models and supplemental information. Creation and rendering of virtual 3D city models comprise a large number of processes, from which texturing and visualization are in the focus of this thesis. In the area of texturing, this thesis presents concepts and techniques for automatic derivation of photo textures from georeferenced oblique aerial imagery and a concept for the integration of surface-bound data into virtual 3D city model datasets. In the area of visualization, this thesis presents concepts and techniques for multiperspective views and for high-quality rendering of nonlinearly projected virtual 3D city models in interactive systems. The automatic derivation of photo textures from georeferenced oblique aerial imagery is a refinement process for a given virtual 3D city model. Our approach uses oblique aerial imagery, since it provides a citywide highly redundant coverage of surfaces, particularly building facades. From this imagery, our approach extracts all views of a given surface and creates a photo texture by selecting the best view on a pixel level. By processing all surfaces, the virtual 3D city model becomes completely textured. This approach has been tested for the official 3D city model of Berlin and the model of the inner city of Munich accessible in GoogleEarth. The integration of surface-bound data, which include textures, into virtual 3D city model datasets has been performed in the context of CityGML, an international standard for the exchange and storage of virtual 3D city models. We derive a data model from a set of use cases and integrate it into the CityGML standard. The data model uses well-known concepts from computer graphics for data representation. Interactive multiperspective views of virtual 3D city models seamlessly supplement a regular perspective view with a second perspective. Such a construction is inspired by panorama maps by H. C. Berann and aims at increasing the amount of information in the image. Key aspect is the construction's use in an interactive system. This thesis presents an approach to create multiperspective views on 3D graphics hardware and exemplifies the extension of bird's eye and pedestrian views. High-quality rendering of nonlinearly projected virtual 3D city models focuses on the implementation of nonlinear projections on 3D graphics hardware. The developed concepts and techniques focus on high image quality. This thesis presents two such concepts, namely dynamic mesh refinement and piecewise perspective projections, which both enable the use of all graphics hardware features, such as screen space gradients and anisotropic texture filtering under nonlinear projections. Both concepts are generic and customizable towards specific projections. They enable the use of common computer graphics effects, such as stylization effects or procedural textures, for nonlinear projections at optimal image quality and interactive frame rates. This thesis comprises essential techniques for virtual 3D city model processing. First, the results of this thesis enable automated creation of textures for and their integration as individual attributes into virtual 3D city models. Hence, this thesis contributes to an improved creation and continuation of textured virtual 3D city models. Furthermore, the results provide novel approaches to and technical solutions for projecting virtual 3D city models in interactive visualizations. Such nonlinear projections are key components of novel user interfaces and interaction techniques for virtual 3D city models, particularly on mobile devices and in immersive environments.
Wallace, Roy Geoffrey. "Fast and accurate phonetic spoken term detection." Thesis, Queensland University of Technology, 2010. https://eprints.qut.edu.au/39610/1/Roy_Wallace_Thesis.pdf.
Повний текст джерелаGoeller, Adrien. "Contribution à la perception augmentée de scènes dynamiques : schémas temps réels d’assimilation de données pour la mécanique du solide et des structures." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLC013/document.
Повний текст джерелаThe development of sensors has always followed the ambition of industrial and scientific people to observe the unobservable. High speed cameras are part of this adventure, revealing invisible dynamics such as cracks formation or subtle mosquito flight. Industrial high speed vision is a very competitive domain in which cameras stand out through their acquisition speed. This thesis aims to broaden their capacity by augmenting the initial acquisition with dynamic models. This work proposes to develop methods linking in real time a model with a real system. Aimed benefits are interpolation, prediction and identification. Three parts are developed. The first one is based on video processing and submits to use kinematic elementary and generic models. An algorithm of motion estimation for large movements is proposed but the generic nature does not allow a sufficient knowledge to be conclusive. The second part proposes using sequential data assimilation methods known as Kalman filters. A scheme to assimilate video data with a mechanical model is successfully implemented. An application of data assimilation in modal analysis is developed. Two multi sensors real time assimilation schemes for nonlinear modal identification are proposed. These schemes are integrated in two applications on 3D reconstruction and motion magnification
Watanabe, Yoko. "Stochastically optimized monocular vision-based navigation and guidance." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22545.
Повний текст джерелаCommittee Chair: Johnson, Eric; Committee Co-Chair: Calise, Anthony; Committee Member: Prasad, J.V.R.; Committee Member: Tannenbaum, Allen; Committee Member: Tsiotras, Panagiotis.
Harmeling, Stefan. "Independent component analysis and beyond." Phd thesis, [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=973631805.
Повний текст джерелаHou, Zhicheng. "Modeling and formation controller design for multi-quadrotor systems with leader-follower configuration." Thesis, Compiègne, 2016. http://www.theses.fr/2016COMP2259/document.
Повний текст джерелаIn this thesis, we address a leader-follower (L-F) formation control problem for multiple UAVs, especially quadrotors. Different from existing works, the strategies, which are proposed in our work, consider that the leader(s) have interaction with the followers. Additionally, the leader(s) are changeable during the formation. First, the mathematical modeling of a single quadrotor and of the formation of quadrotors is developed. The trajectory tracking problem for a single quadrotor is investigated. Through the analysis of the flatness of the quadrotor dynamical model, the desired trajectory for each quadrotor is transferred to the design of the desired at outputs. A flatness-based trajectory tracking controller is, then, proposed. Considering the double-loop property of the closed-loop quadrotor dynamics, a high-gain attitude controller is designed, according to the singular perturbation system theory. Since the closed-loop quadrotor dynamics performs in two time scales, the rotational dynamics (boundary-layer model) is controlled in a fast time scale. The formation controller design is then only considered for the translational dynamics: reduced model in a slow time scale. This result has simplified the formation controller design such that the reduced model of the quadrotor is considered instead of the complete model. Since the reduced model of the quadrotor has a double-integrator characteristic, consensus algorithm for multiple double-integrator systems is proposed. Dealing with the leader-follower formation problem, an interaction matrix is originally proposed based on the Laplacian matrix. We prove that the convergence condition and convergence speed of the formation error are in terms of the smallest eigenvalue of the interaction matrix. Three formation control strategies with fixed formation topology are then proposed. The flatness-based formation control is proposed to deal with the aggressive formation problem, while the high-order derivatives of the desired trajectory for each UAV are estimated by using an observer; the Lyapunov redesign is developed to deal with the nonlinearities of the translational dynamics of the quadrotors; the hyperbolic tangent-based bounded control with composite nonlinear feedback is developed in order to improve the performance of the formation. In an additional way, a saturated switching control of the formation is investigated, where the formation topology is switching. The stability of the system is obtained by introducing the convex hull theory and the common Lyapunov function. This switching control strategy permits the change of the leaders in the formation. Inspired by some existing works, such as the anonymous neighbor-based formation control, we finally propose a weighted neighbor-based control, which shows better robustness than the anonymous neighbor-based control. Simulation results using Matlab primarily illustrate our proposed formation control strategies. Furthermore, using C++ programming, our strategies are implemented on the simulator-experiment framework, developed at Heudiasyc laboratory. Through a variety of tests on the simulator and real-time experiments, the efficiency and the advantages of our proposed formation control strategies are shown. Finally, a vision-based inter-distance detection system is developed. This system is composed by an on-board camera, infrared LEDs and an infrared filter. The idea is to detect the UAVs and calculate the inter-distance by calculating the area of the special LEDs patterns. This algorithm is validated on a PC, with a webcam and primarily implemented on a real quadrotor
Courtat, Thomas. "Promenade dans les cartes de villes - Phénoménologie mathématique et physique de la ville - une approche géométrique." Phd thesis, Université Paris-Diderot - Paris VII, 2012. http://tel.archives-ouvertes.fr/tel-00714310.
Повний текст джерелаAleksić, Zoran. "Applications of nonlinear dynamics to information processing." Phd thesis, 1990. http://hdl.handle.net/1885/138341.
Повний текст джерела"All-optical switching and variable delay using nonlinear optical signal processing techniques." 2008. http://library.cuhk.edu.hk/record=b5893658.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2008.
Includes bibliographical references.
Abstracts in English and Chinese.
ABSTRACT --- p.I
摘要 --- p.II
ACKNOWLEDGEMENTS --- p.V
TABLE OF CONTENTS --- p.IV
INTRODUCTION --- p.0
Chapter 1.1 --- Different ways to achieve all-optical tunable delay --- p.2
Chapter 1.1.1 --- Optical buffer realized with optical switching --- p.2
Chapter 1.1.2 --- Slow light technique --- p.3
Chapter (i) --- Basics of slow light --- p.4
Chapter (ii) --- Slow light via electromagnetically induced transparency (EIT) --- p.6
Chapter (iii) --- Slow light via coherent population oscillation (CPO) --- p.7
Chapter (iv) --- Slow light via optical parametric amplification (OPA) --- p.8
Chapter (v) --- Slow light via stimulated Raman and Brillouin scattering --- p.8
Chapter 1.1.3 --- Tunable delay using wavelength conversion together with chromatic dispersion --- p.10
Chapter 1.1.4 --- Comparison of different schemes for constructing all-optical delay line --- p.11
Chapter 1.2 --- Overview of the thesis --- p.12
References --- p.14
ALL-OPTICAL SWITCHING OF DPSK SIGNAL IN AN SOA USING NONLINEAR POLARIZATION ROTATION --- p.18
Chapter 2.1 --- Introduction --- p.19
Chapter 2.2 --- Birefringence and nonlinear polarization rotation --- p.20
Chapter 2.3 --- Differential-phase-shift keying (DPSK) modulation format --- p.22
Chapter 2.4 --- Experimental setup --- p.23
Chapter 2.5 --- Experimental results --- p.25
Chapter 2.6 --- Conclusion --- p.29
References --- p.30
WIDEBAND SLOW LIGHT VIA STIMULATED BRILLOUIN SCATTERING IN AN OPTICAL FIBER USING A PHASE-MODULATED PUMP --- p.32
Chapter 3.1 --- Introduction --- p.33
Chapter 3.2 --- Stimulated Brillouin scattering (SBS) --- p.34
Chapter 3.3 --- Slow light via SBS --- p.35
Chapter 3.4 --- Experimental setup --- p.37
Chapter 3.5 --- Experimental result --- p.39
Conclusion --- p.42
References --- p.43
SIGNAL WAVELENGTH TRANSPARENT SBS SLOW LIGHT USING XGM BASED WAVELENGTH CONVERTER AND BRILLOUIN FIBER LASER --- p.45
Chapter 4.1 --- Introduction --- p.46
Chapter 4.2 --- Brillouin fiber laser and XGM wavelength converter --- p.47
Chapter 4.3 --- Operating principle --- p.50
Chapter 4.4 --- Experimental setup and results --- p.51
Conclusion --- p.56
References --- p.57
ALL-OPTICAL TUNABLE DELAY LINE FOR CHANNEL SELECTION IN A 40-GB/S OPTICAL TIME DIVISION MULTIPLEXING SYSTEM --- p.59
Chapter 5.1 --- Introduction --- p.60
Chapter 5.2 --- Principle of four-wave mixing --- p.61
Chapter 5.3 --- Channel selection in an OTDM system --- p.63
Chapter 5.4 --- Experimental setup --- p.64
Chapter 5.5 --- Experimental results --- p.67
Conclusion --- p.70
References --- p.71
TUNABLE OPTICAL DELAY WITH CSRZ-OOK TO RZ-OOK OPTICAL DATA FORMAT CONVERSION USING FOUR-WAVE MIXING WAVELENGTH CONVERSION AND GROUP VELOCITY DISPERSION --- p.73
Chapter 6.1 --- Introduction --- p.74
Chapter 6.2 --- Carrier-Suppressed Return-to-Zero --- p.76
Chapter 6.3 --- Operating Principle --- p.77
Chapter 6.4 --- Experimental setup --- p.79
Chapter 6.5 --- Experimental result --- p.81
Conclusion --- p.86
References --- p.87
CONCLUSION --- p.90
Chapter 7.1 --- Summary of work --- p.90
Chapter 7.2 --- Prospects of future work --- p.92
APPENDIX: LIST OF PUBLICATIONS A
Chen, Jun De, and 陳俊德. "A study on the parallel processing architectures for nonlinear filters and LZ-based data compression." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/98645753350902702044.
Повний текст джерела"Maximum likelihood estimation of nonlinear factor analysis model using MCECM algorithm." 2005. http://library.cuhk.edu.hk/record=b5892697.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2005.
Includes bibliographical references (leaves 73-77).
Abstracts in English and Chinese.
Acknowledgements --- p.iv
Abstract --- p.v
Table of Contents --- p.vii
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Nonlinear Factor Analysis Model --- p.1
Chapter 1.2 --- Main Objectives --- p.2
Chapter 1.2.1 --- Investigation of the performance of the ML approach with MCECM algorithm in NFA model --- p.2
Chapter 1.2.2 --- Investigation of the Robustness of the ML approach with MCECM algorithm --- p.3
Chapter 1.3 --- Structure of the Thesis --- p.3
Chapter 2 --- Theoretical Background of the MCECM Algorithm --- p.5
Chapter 2.1 --- Introduction of the EM algorithm --- p.5
Chapter 2.2 --- Monte Carlo integration --- p.7
Chapter 2.3 --- Markov Chains --- p.7
Chapter 2.4 --- The Metropolis-Hastings algorithm --- p.8
Chapter 3 --- Maximum Likelihood Estimation of a Nonlinear Factor Analysis Model --- p.10
Chapter 3.1 --- MCECM Algorithm --- p.10
Chapter 3.1.1 --- Motivation of Using MCECM algorithm --- p.11
Chapter 3.1.2 --- Introduction of the Realization of the MCECM algorithm --- p.12
Chapter 3.1.3 --- Implementation of the E-step via the MH Algorithm --- p.13
Chapter 3.1.4 --- Maximization Step --- p.15
Chapter 3.2 --- Monitoring Convergence of MCECM --- p.17
Chapter 3.2.1 --- Bridge Sampling Method --- p.17
Chapter 3.2.2 --- Average Batch Mean Method --- p.18
Chapter 4 --- Simulation Studies --- p.20
Chapter 4.1 --- The First Simulation Study with the Normal Distribution --- p.20
Chapter 4.1.1 --- Model Specification --- p.20
Chapter 4.1.2 --- The Selection of System Parameters --- p.22
Chapter 4.1.3 --- Monitoring the Convergence --- p.22
Chapter 4.1.4 --- Simulation Results for the ML Estimates --- p.25
Chapter 4.2 --- The Second Simulation Study with the Normal Distribution --- p.34
Chapter 4.2.1 --- Model Specification --- p.34
Chapter 4.2.2 --- Monitoring the Convergence --- p.35
Chapter 4.2.3 --- Simulation Results for the ML Estimates --- p.38
Chapter 4.3 --- The Third Simulation Study on Robustness --- p.47
Chapter 4.3.1 --- Model Specification --- p.47
Chapter 4.3.2 --- Monitoring the Convergence --- p.48
Chapter 4.3.3 --- Simulation Results for the ML Estimates --- p.51
Chapter 4.4 --- The Fourth Simulation Study on Robustness --- p.59
Chapter 4.4.1 --- Model Specification --- p.59
Chapter 4.4.2 --- Monitoring the Convergence --- p.59
Chapter 4.4.3 --- Simulation Results for the ML Estimates --- p.62
Chapter 5 --- Conclusion --- p.71
Bibliography --- p.73
dos, Santos Ketson Roberto Maximiano. "Stochastic dynamics and wavelets techniques for system response analysis and diagnostics: Diverse applications in structural and biomedical engineering." Thesis, 2019. https://doi.org/10.7916/d8-d26y-tz96.
Повний текст джерела