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Relevant bibliographies by topics / Optical design techniques / Dissertations / Theses

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Dissertations / Theses on the topic 'Optical design techniques'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Muretto, Giovanni <1976&gt. "Design and control techniques of optical networks." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2007. http://amsdottorato.unibo.it/403/.

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The world of communication has changed quickly in the last decade resulting in the the rapid increase in the pace of peoples’ lives. This is due to the explosion of mobile communication and the internet which has now reached all levels of society. With such pressure for access to communication there is increased demand for bandwidth. Photonic technology is the right solution for high speed networks that have to supply wide bandwidth to new communication service providers. In particular this Ph.D. dissertation deals with DWDM optical packet-switched networks. The issue introduces a huge quantit

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2

Bignell, Allan M. "Photonic bus and photonic mesh networks : design techniques in extremely high speed networks /." *McMaster only, 1997.

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3

Luís, Ruben Soares. "Design and optimization of optical routing techniques and devices." Doctoral thesis, Universidade de Aveiro, 2007. http://hdl.handle.net/10773/2212.

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Doutoramento em Engenharia Electrotécnica<br>Este trabalho apresenta três estudos principais acerca do desenvolvimento e aplicação de sistemas de monitorização óptica avançados com base na análise de histogramas assíncronos, conversão de comprimento de onda de sinais de débito elevado e o impacto das não-linearidades das fibra ópticas em sistemas utilizando técnicas avançadas de transmissão. Mostra-se que a comparação de histogramas assíncronos com histogramas de referência pode ser usada para extrair informação a respeito da qualidade e do ruído que afecta o sinal em análise. O método

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4

Emerton, Neil. "Design and fabrication techniques for surface relief diffractive optical elements." Thesis, Imperial College London, 1986. http://hdl.handle.net/10044/1/38000.

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5

Ghazisaeidi, Amirhossein. "Advanced Numerical Techniques for Design and Optimization of Optical Links Employing Nonlinear Semiconductor Optical Amplifiers." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/27541/27541.pdf.

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6

Feng, Ning-Ning Huang Wei-Ping. "Modeling, simulation and design techniques for high-density complex photonic integrated devices and circuits." *McMaster only, 2005.

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7

Liu, Cheng. "Advanced system design and signal processing techniques for converged high-speed optical and wireless applications." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/49058.

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The ever-increasing data traffic demand drives the evolution of telecommunication networks, including the last-mile access networks as well as the long-haul backbone networks. This Ph.D. dissertation focuses on system design and signal processing techniques for next-generation converged optical-wireless access systems and the high-speed long-haul coherent optical communication systems. The convergence of high-speed millimeter-wave wireless communications and high-capacity fiber-optic backhaul networks provides tremendous potential to meet the capacity requirements of future access networks. In

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8

Wang, Y. "Analytical derivatives and other techniques for improving the effectiveness of automatic optical design." Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371442.

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9

Aydogdu, Selcuk. "Near Infrared Interference Filter Design And The Production Withion-assisted Deposition Techniques." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614092/index.pdf.

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Near infrared region (NIR) of the electromagnetic spectrum (EM) is defined as 700nm to 1400nm wavelength interval by International Commission on Illumination(CIE). This wavelength interval is extensively used for target acquisition, night vision, wireless communication etc. Therefore, filtering the desired portion of EM spectra becomes a need for that kind of applications. Interference filters are multilayer optical devices which can be designed and produced for the desired wavelength intervals. The production of near infrared interference filters is a process of depositing thin material layer

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10

Vazquez, Javier. "Analysis and design of planar active and passive quasi-optical components using new FDTD techniques." Thesis, Queen Mary, University of London, 2002. http://qmro.qmul.ac.uk/xmlui/handle/123456789/28583.

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New Quasi-optical sensor technology, based on the millimetre and submillimetre band of the electromagnetic spectrum, is actually being implemented for many commercial and scientific applications such as remote sensing, astronomy, collision avoidance radar, etc. These novel devices make use of integrated active and passive structures usually as planar arrays. The electromagnetic design and computer simulation of these new structures requires novel numerical techniques. The Finite Difference Time Domain method (FDTD) is well suited for the electromagnetic analysis of integrated devices using act

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11

Mignard-Debise, Lois. "Tools for the paraxial optical design of light field imaging systems." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0009/document.

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L'imagerie plénoptique est souvent présentée comme une révolution par rapport à l'imagerie standard. En effet, elle apporte plus de contrôle à l'utilisateur sur l'image finale puisque les dimensions spatiales et angulaires du champ de lumière offrent la possibilité de changer le point de vue ou de refaire la mise au point après coup ainsi que de calculer la carte de profondeur de la scène. Cependant, cela complique le travail du concepteur optique du système pour deux raisons. La première est qu'il existe une multitude d'appareils de capture plénoptique différents, chacun avec sa propre spécif

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12

Krueger, Jared K. (Jared Keith). "CLOSeSat : Perigee-lowering techniques and preliminary design for a small optical imaging satellite operating in very low earth orbit." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/64565.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2010.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 125-126).<br>The ever-increasing role of intelligence, surveillance, and reconnaissance (ISR) assets in combat may require relatively large numbers of earth observation spacecraft to maintain situational awareness. One way to reduce the cost of such systems is to operate at very low altitudes, thereby minimizing optics size and cost for a given ground resolution. This outside-the-box idea attempts to bridge the ga

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13

Nguyen, Giang Thach, and thach nguyen@rmit edu au. "Efficient Resonantly Enhanced Mach-Zehnder Optical Modulator on Lithium Niobate." RMIT University. Electrical and Computer Engineering, 2006. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20070118.162330.

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Photonic links have been proposed to transport radio frequency (RF) signals over optical fiber. External optical modulation is commonly used in high performance RF-photonic links. The practical use of optical fiber to transport RF signals is still limited due to high RF signal loss. In order to reduce the RF signal loss, highly efficient modulators are needed. For many applications, modulators with broad bandwidths are required. However, there are applications that require only a narrow bandwidth. For these narrow-band applications, the modulation efficiency can be improved through the resonan

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14

Giuglea, Alexandru, Guido Belfiore, Mahdi Khafaji, Ronny Henker, Despoina Petousi, Georg Winzer, Lars Zimmermann, and Frank Ellinger. "Comparison of Segmented and Traveling-Wave Electro-Optical Transmitters Based on Silicon Photonics Mach-Zehnder Modulators." Institute of Electrical and Electronics Engineers (IEEE), 2018. https://tud.qucosa.de/id/qucosa%3A35393.

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This paper presents a brief study of the two most commonly used topologies - segmented and traveling-wave - for realizing monolithically integrated electro-optical transmitters consisting of Si-photonics Mach-Zehnder modulators and their electrical drivers. To this end, two new transmitters employing high swing breakdown voltage doubler drivers were designed in the aforementioned topologies and compared with regard to their extinction ratio and DC power consumption at the data rate of 30 Gb/s. It is shown that for the targeted data rate and extinction ratio, a considerably lower power consumpt

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15

Straka, Branislav. "Optická pinzeta pro koherencí řízený holografický mikroskop." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230594.

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In the master's thesis, there has been described and explained the principle of operation of the second generation coherence controlled holographic microscope (CCHM2) designed at the Brno University of Technology. There has also been listed theoretical description of the operation of the optical trap, together with the calculation of the forces acting on it, ways of measuring the stiffness of the optical trap and the principle of~creating a time-shared optical traps. The optical tweezers forming a separate module connectable to CCHM2 was designed. Simulation and optimization of parameters of t

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16

Neradovskiy, Maxim. "Guides d’ondes dans un cristal de niobate de lithium périodiquement polarisé : fabrication et étude par des techniques de microscopie à sonde locale." Thesis, Nice, 2016. http://www.theses.fr/2016NICE4035/document.

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Nous avons étudié l'influence de la fabrication de guides d'ondes optiques par échange protonique doux(SPE) sur les cristaux de niobate de lithium (LN) polarisé périodiquement et nous avons montré que,dans certains cas, ce processus conduit à la création de nanodomaines en surface. Ces nanodomaines enforme d'aiguille peuvent être responsables de la réduction de l'efficacité de conversion non linéaireobservée dans les guides qui sont affectés. Nous avons également étudié l'influence de différents typesd'échange protonique sur la formation, par application d'un champ électrique, de domaines dans

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17

Barutcu, Burcu. "The Design And Production Of Interference Edge Filters With Plasma Ion Assisted Deposition Technique For A Space Camera." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614574/index.pdf.

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Interference filters are multilayer thin film devices. They use interference effects between the incident and reflected radiation waves at each layer interface to select wavelengths. The production of interference filters depend on the precise deposition of thin material layers on substrates which have suitable optical properties. In this thesis, the main target is to design and produce two optical filters (short-pass filter and long-pass filter) for the CCDs that will be used in the electronics of a space camera. By means of these filters, it is possible to take image in different bands (RGB

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18

Abouseif, Akram. "Emerging DSP techniques for multi-core fiber transmission systems." Electronic Thesis or Diss., Institut polytechnique de Paris, 2020. http://www.theses.fr/2020IPPAT013.

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Les systèmes de communication optique ont connu plusieurs phases de développement au cours des dernières décennies. Ils approchent aujourd'hui les limites de capacité du cana non-linéaire. L'espace est aujourd'hui le dernier degré de liberté à mettre en œuvre afin de continuer à répondre aux demandes de capacité à venir pour les prochaines années. Par conséquent, des recherches intensives sont menées pour explorer tous les aspects concernant le déploiement du système de multiplexage par division spatiale (SDM). Plusieurs dégradations ont un impact sur les systèmes SDM en raison de l'interactio

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19

Tran, Minh Tue. "Pixel and patch based texture synthesis using image segmentation." University of Western Australia. School of Computer Science and Software Engineering, 2010. http://theses.library.uwa.edu.au/adt-WU2010.0030.

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[Truncated abstract] Texture exists all around us and serves as an important visual cue for the human visual system. Captured within an image, we identify texture by its recognisable visual pattern. It carries extensive information and plays an important role in our interpretation of a visual scene. The subject of this thesis is texture synthesis, which is de ned as the creation of a new texture that shares the fundamental visual characteristics of an existing texture such that the new image and the original are perceptually similar. Textures are used in computer graphics, computer-aided desig

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20

Falcon, Maimone Rafael. "Co-conception des systemes optiques avec masques de phase pour l'augmentation de la profondeur du champ : evaluation du performance et contribution de la super-résolution." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLO006/document.

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Les masques de phase sont des dispositifs réfractifs situés généralement au niveau de la pupille d’un système optique pour en modifier la réponse impulsionnelle (PSF en anglais), par une technique habituellement connue sous le nom de codage de front d’onde. Ces masques peuvent être utilisés pour augmenter la profondeur du champ (DoF en anglais) des systèmes d’imagerie sans diminuer la quantité de lumière qui entre dans le système, en produisant une PSF ayant une plus grande invariance à la défocalisation. Cependant, plus le DoF est grand plus l’image acquise est floue et une opération de décon

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21

Dale, Brian M. "Optimal Design of MR Image Acquisition Techniques." Case Western Reserve University School of Graduate Studies / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1081556784.

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22

Liou, K. S. "Improvement in automatic lens design techniques." Thesis, University of Reading, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355846.

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23

Engevik, Erlend L. "Optimal Design of Tidal Power Generator Using Stochastic Optimization Techniques." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-27239.

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Particle Swarm Optimization (PSO) and Genetic Algorithms (GA) are usedto reduce the cost of a permanent magnet synchronous generator with concentratedwindings for tidal power applications. Reducing the cost of the electricalmachine is one way of making tidal energy more competitive compared to traditionalsources of electricity.Hybrid optimization combining PSO or GA with gradient based algorithmsseems to be suited for design of electrical machines. Results from optimizationwith Matlab indicate that hybrid GA performs better than Hybrid PSO forthis kind of optimization problems. Hybrid GA shows

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24

Wan, Li. "Modeling and optimal design of annular array based ultrasound pulse-echo system." Link to electronic thesis, 2001. http://www.wpi.edu/Pubs/ETD/Available/etd-0418101-100413/.

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Thesis (M.S.)--Worcester Polytechnic Institute.<br>Title from title screen. Keywords: optimal design; modeling; object identification; ultrasound pulse-echo system; annular array. Includes bibliographical references (p. 159-162).

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25

Howlett, Isela D., Wanglei Han, Michael Gordon, Photini Rice, Jennifer K. Barton, and Raymond K. Kostuk. "Volume holographic imaging endoscopic design and construction techniques." SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, 2017. http://hdl.handle.net/10150/624713.

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A reflectance volume holographic imaging (VHI) endoscope has been designed for simultaneous in vivo imaging of surface and subsurface tissue structures. Prior utilization of VHI systems has been limited to ex vivo tissue imaging. The VHI system presented in this work is designed for laparoscopic use. It consists of a probe section that relays light from the tissue sample to a handheld unit that contains the VHI microscope. The probe section is constructed from gradient index (GRIN) lenses that form a 1: 1 relay for image collection. The probe has an outer diameter of 3.8 mm and is capable of a

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26

Soan, Peter Humphrey. "Transformation techniques in optimal design problems with application to harbour shapes." Thesis, Kingston University, 1990. http://eprints.kingston.ac.uk/20545/.

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In this thesis the previously unsolved problem of finding the shape of a harbour which minimises the wave height inside is considered. This is a problem of optimal shape design in which the wave height variation is given by a partial differential equation defined over the harbour region and the optimisation is performed with respect to the shape of the boundary of this same region. A brief review of methods that have been used in the past to solve similar problems is given. It is noted that here, in contrast to most previous approaches which have been iterative, the solution of the partial dif

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27

Al-Bizri, N. "Aberration theory and design techniques for refracting prism systems." Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233134.

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28

Noble, Christopher Aaron. "Analytical and Numerical Techniques for the Optimal Design of Mineral Separation Circuits." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/23224.

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The design of mineral processing circuits is a complex, open-ended process. While several tools and methodologies are available, extensive data collection accompanied with trial-and-error simulation are often the predominant technical measures utilized throughout the process. Unfortunately, this approach often produces sub-optimal solutions, while squandering time and financial resources. This work proposes several new and refined methodologies intended to assist during all stages of circuit design. First, an algorithm has been developed to automatically determine circuit analytical soluti

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29

Pessoa, Lucio Flavio Cavalcanti. "Nonlinear systems and neural networks with hybrid morphological/rank/linear nodes : optimal design and applications to image processing and pattern recognition." Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13519.

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30

Miah, Suruz. "Design and Implementation of Control Techniques for Differential Drive Mobile Robots: An RFID Approach." Thèse, Université d'Ottawa / University of Ottawa, 2012. http://hdl.handle.net/10393/23343.

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Localization and motion control (navigation) are two major tasks for a successful mobile robot navigation. The motion controller determines the appropriate action for the robot’s actuator based on its current state in an operating environment. A robot recognizes its environment through some sensors and executes physical actions through actuation mechanisms. However, sensory information is noisy and hence actions generated based on this information may be non-deterministic. Therefore, a mobile robot provides actions to its actuators with a certain degree of uncertainty. Moreover, when no prior

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31

Sunay, Ahmet Sertac. "Analysis And Design Of Passive Microwave And Optical Devices Using The Multimode Interference Technique." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606456/index.pdf.

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The Multimode Interference (MMI) mechanism is a powerful toool used in the analysis and design of a certain class of optical, microwave and millimeter wave devices. The principles of the MMI method and the self-imaging principle is described. Using this method, NXM MMI couplers, MMI splitter/combiners are analyzed. Computer simulations for illustrating the &quot<br>Multimode Interference Mechanism&quot<br>are carried out. The MMI approach is used to analyze overmoded &#039<br>rectangular metallic&#039<br>and &#039<br>dielectric slab&#039<br>type of waveguides and devices. The application of th

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32

Karimli, Nigar. "Parameter Estimation and Optimal Design Techniques to Analyze a Mathematical Model in Wound Healing." TopSCHOLAR®, 2019. https://digitalcommons.wku.edu/theses/3114.

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For this project, we use a modified version of a previously developed mathematical model, which describes the relationships among matrix metalloproteinases (MMPs), their tissue inhibitors (TIMPs), and extracellular matrix (ECM). Our ultimate goal is to quantify and understand differences in parameter estimates between patients in order to predict future responses and individualize treatment for each patient. By analyzing parameter confidence intervals and confidence and prediction intervals for the state variables, we develop a parameter space reduction algorithm that results in better future

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33

Butt, Sajid Ullah. "Design and modelling of a fixturing system for an optimal balancing of a part family." Paris, ENSAM, 2012. http://www.theses.fr/2012ENAM0022.

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Les erreurs dimensionnelles des pièces d'une famille de pièces provoquent un mauvais placement initial de la pièce sur le montage affectant la qualité du produit final. Même si la pièce est positionnée correctement, la pièce s'écarte de cette position initiale à cause des forces externe d'usinage et de bridage et de la rigidité du montage. Dans cette thèse, un modèle analytique complet, composé d'un modèle cinématique et un modèle mécanique, ayant une configuration de type 3-2-1 des appuis est proposé. Le modèle cinématique remet la pièce, initialement mal placée dans la référence machine, sur

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34

WAN, Li. "Modeling and Optimal Design of Annular Array Based Ultrasound Pulse-Echo System." Digital WPI, 2001. https://digitalcommons.wpi.edu/etd-theses/219.

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The ability to numerically determine the received signal in an ultrasound pulse-echo system is very important for the development of new ultrasound applications, such as tissue characterization, complex object recognition, and identification of surface topology. The output signal from an ultrasound pulse-echo system depends on the transducer geometry, reflector shape, location and orientation, among others, therefore, only by numerical modeling can the output signal for a given measurement configuration be predicted. This thesis concerns about the numerical modeling and optimal design of annul

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35

Lopez, Sanchez Francisco Javier. "Optimal design and application of trellis coded modulation techniques defined over the ring of integers." Thesis, Staffordshire University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.262313.

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36

Boonnithivorakul, Nattapong. "OPTIMAL CONTROL DESIGN FOR POLYNOMIAL NONLINEAR SYSTEMS USING SUM OF SQUARES TECHNIQUE WITH GUARANTEED LOCAL OPTIMALITY." OpenSIUC, 2010. https://opensiuc.lib.siu.edu/dissertations/149.

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Optimal control design and implementation for nonlinear systems is a topic of much interest. However, unlike for linear systems, for nonlinear systems explicit analytical solution for optimal feedback control is not available. Numerical techniques, on the other hand, can be used to approximate the solution of the HJB equation to find the optimal control. In this research, a computational approach is developed for finding the optimal control for nonlinear systems with polynomial vector fields based on sum of squares technique. In this research, a numerical technique is developed for optimal con

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Godoy, Rodrigo Juliani Corrêa de. "Plantwide control: a review and proposal of an augmented hierarchical plantwide control design technique." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3139/tde-07112017-140120/.

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The problem of designing control systems for entire plants is studied. A review of previous works, available techniques and current research challenges is presented, followed by the description of some theoretical tools to improve plantwide control, including the proposal of an augmented lexicographic multi-objective optimization procedure. With these, an augmented hierarchical plantwide control design technique and an optimal multi-objective technique for integrated control structure selection and controller tuning are proposed. The main contributions of these proposed techniques are the incl

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38

Abushammala, Omran. "Optimal Helical Tube Design for Intensified Heat / Mass Exchangers." Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0091.

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La recherche de solutions technologiques visant à minimiser la taille d’un dispositif, qualifiée d’intensification, est un objectif classique du génie des procédés. Dans ce mémoire, les possibilités d’intensification offertes par des tubes hélicoïdaux sont étudiées, à la fois pour des échangeurs de chaleur et de matière. L’utilisation de tubes hélicoïdaux en lieu et place de tubes droits présente en effet un intérêt à la fois en termes d’augmentation de la surface d’échange par unité de volume entre les deux fluides circulant dans l’échangeur et par la possibilité d’augmentation des transferts

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Di, Pretoro Alessandro. "Optimal design of flexible, operable and sustainable processes under uncertainty : biorefinery applications." Thesis, Toulouse, INPT, 2020. http://www.theses.fr/2020INPT0073.

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La démarche conventionnelle pour le design des procédés est une procédure bien consolidée dans le domaine du génie des procédés et utilise des méthodes d’optimisation basées sur plusieurs objectifs pour satisfaire le différents degrés des liberté. Cependant, l’optimalité de la solution obtenue avec cette procédure est uniquement associée aux conditions opératoires nominales et néglige les perturbations externes. L’objectif de cette thèse est la prise en compte de la flexibilité à chaque étape de la démarche de conception des procédés. À ce propos un cas d’étude concernant une opération de sépa

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Mital, Rashmi. "Design and demonstration of a novel optical true time delay technique using polynomial cells based on white cells." Connect to this title online, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1111161542.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xiii, 195 p.; also includes graphics (some col.) Includes bibliographical references (p. 190-195). Available online via OhioLINK's ETD Center

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Gong, Jinlin. "Modélisation et conception optimale d’un moteur linéaire à induction pour système de traction ferroviaire." Thesis, Ecole centrale de Lille, 2011. http://www.theses.fr/2011ECLI0016/document.

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Cette thèse porte sur l’étude des performances du moteur linéaire de référence par la méthode d’analyse éléments finis, et la conception optimale sur un modèle lourd en temps de calcul. La méthode éléments finis est utilisée pour étudier les performances du moteur linéaire de référence, car le modèle analytique d’un moteur linéaire est difficile à construire dû aux effets d’extrémités. Le modèle éléments finis (MEF) 2D permet de prendre en compte l’effet d’extrémité de longueur finie. L’effet d’extrémité de largeur finie est intégré au modèle 2D en faisant varier la conductivité du secondaire

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42

Ceschia, Adriano. "Méthodologie de conception optimale de chaines de conversion d’énergie embarquées." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPAST023.

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Les travaux proposés dans cette thèse s’inscrivent dans le cadre de l’électrification des systèmes embarqués au travers du développement de nouvelles chaines hybrides de conversion d’énergie ; celle-ci se fondant sur de nouvelles motorisations et combinaison de sources d’énergies complémentaires. Ces systèmes présentent de nombreux degrés de liberté, tant vis-à-vis des paramètres de ses constituants, que des réglages des lois de contrôle qui leurs sont associées. L’optimisation (technico-économique) pertinente de ces chaines de conversion complexes repose donc sur l’aptitude des méthodes de re

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Roth, Matthias, Jörg Heber, and Klaus Janschek. "System design of programmable 4f phase modulation techniques for rapid intensity shaping: A conceptual comparison." SPIE, 2016. https://tud.qucosa.de/id/qucosa%3A35096.

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The present study analyses three beam shaping approaches with respect to a light-efficient generation of i) patterns and ii) multiple spots by means of a generic optical 4f-setup. 4f approaches share the property that due to the one-to-one relationship between output intensity and input phase, the need for time-consuming, iterative calculation can be avoided. The resulting low computational complexity offers a particular advantage compared to the widely used holographic principles and makes them potential candidates for real-time applications. The increasing availability of high-speed phase mo

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Xia, Liang. "Towards optimal design of multiscale nonlinear structures : reduced-order modeling approaches." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2230/document.

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L'objectif principal est de faire premiers pas vers la conception topologique de structures hétérogènes à comportement non-linéaires. Le deuxième objectif est d’optimiser simultanément la topologie de la structure et du matériau. Il requiert la combinaison des méthodes de conception optimale et des approches de modélisation multi-échelle. En raison des lourdes exigences de calcul, nous avons introduit des techniques de réduction de modèle et de calcul parallèle. Nous avons développé tout d’abord un cadre de conception multi-échelle constitué de l’optimisation topologique et la modélisation mul

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Mehranipornejad, Ebrahim. "Evaluation of AASHTO design specifications for cast-in-place continuous bridge deck using remote sensing technique." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001584.

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Kurth, Mathias. "Contention techniques for opportunistic communication in wireless mesh networks." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät II, 2012. http://dx.doi.org/10.18452/16458.

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Auf dem Gebiet der drahtlosen Kommunikation und insbesondere auf den tieferen Netzwerkschichten sind gewaltige Fortschritte zu verzeichnen. Innovative Konzepte und Technologien auf der physikalischen Schicht (PHY) gehen dabei zeitnah in zelluläre Netze ein. Drahtlose Maschennetzwerke (WMNs) können mit diesem Innovationstempo nicht mithalten. Die Mehrnutzer-Kommunikation ist ein Grundpfeiler vieler angewandter PHY Technologien, die sich in WMNs nur ungenügend auf die etablierte Schichtenarchitektur abbilden lässt. Insbesondere ist das Problem des Scheduling in WMNs inhärent komplex. Erstaunlic

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Price, Nathaniel Bouton. "Conception sous incertitudes de modèles avec prise en compte des tests futurs et des re-conceptions." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEM012/document.

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Au stade de projet amont, les ingénieurs utilisent souvent des modèles de basse fidélité possédant de larges erreurs. Les approches déterministes prennent implicitement en compte les erreurs par un choix conservatif des paramètres aléatoires et par l'ajout de facteurs de sécurité dans les contraintes de conception. Une fois qu'une solution est proposée, elle est analysée par un modèle haute fidélité (test futur): une re-conception peut s'avérer nécessaire pour restaurer la fiabilité ou améliorer la performance, et le modèle basse fidélité est calibré pour prendre en compte les résultats de l'a

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Dinh, Van Binh. "Méthodes et outils pour le dimensionnement des bâtiments et des systèmes énergétiques en phase d'esquisse intégrant la gestion optimale." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT092/document.

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Dans le but de réduire la consommation d’énergie et d’augmenter la part des énergies renouvelables, la conception optimale des futurs bâtiments (bâtiments intelligents) apparaît comme un facteur important. Cette thèse vise donc à développer des modèles, des méthodes innovantes d’aide à la conception pour ces bâtiments. Notre nouvelle approche de conception est une optimisation globale et simultanée de l’enveloppe, des systèmes énergétiques et de leurs stratégies de gestion dès la phase d’esquisse, qui prend en compte plusieurs critères de coût (investissement et exploitation) et de confort (th

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Barnhart, Samuel. "Design and Development of a Coherent Detection Rayleigh Doppler Lidar System for Use as an Alternative Velocimetry Technique in Wind Tunnels." University of Dayton / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1595276402371536.

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Berbecea, Alexandru. "Approches multi-niveaux pour la conception systémique optimale des chaînes de traction ferroviaire." Phd thesis, Ecole Centrale de Lille, 2012. http://tel.archives-ouvertes.fr/tel-00917657.

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Dans le contexte actuel de globalisation des marchés, le processus classique de conception par essais et erreurs n'est plus capable de répondre aux exigences de plus en plus accrues en termes de délais très courts, réduction des coûts de production, etc. L'outil d'optimisation propose une réponse à ces questions, en accompagnant les ingénieurs dans la tâche de conception optimale.L'objectif de cette thèse est centré sur la conception optimale des systèmes complexes. Deux approches sont abordées dans ce travail: l'optimisation par modèles de substitution et la conception optimale basée sur la d

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