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Dissertations / Theses on the topic 'Hybrid Loss'

Author: Grafiati

Published: 25 May 2024

Last updated: 31 July 2025

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1

Ryan, James. "Organic and hybrid optoelectronic devices: understanding key loss mechanisms." Doctoral thesis, Universitat Rovira i Virgili, 2013. http://hdl.handle.net/10803/285966.

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This thesis sets to understand key limiting steps in organic solar cells (OSCs) and hybrid organic-inorganic light-emitting diodes (HyLEDs) and to provide routes to more environmentally friendly and lower cost devices. As well as studying organic optoelectronic devices, hybrid organic-inorganic approaches are also explored from both a fundamental point of view (quantum dot/organic solar cells) to a more technological one (air-stable, low cost light emitting diodes). The origin of the opencircuit voltage in bilayer solar cells is studied using transient optoelectronic techniques to probe the ch

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2

Boyd, Steven J. "Hybrid Electric Vehicle Control Strategy Based on Power Loss Calculations." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/34970.

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Defining an operation strategy for a Split Parallel Architecture (SPA) Hybrid Electric Vehicle (HEV) is accomplished through calculating powertrain component losses. The results of these calculations define how the vehicle can decrease fuel consumption while maintaining low vehicle emissions. For a HEV, simply operating the vehicle's engine in its regions of high efficiency does not guarantee the most efficient vehicle operation. The results presented are meant only to define a literal strategy; that is, an understanding as to why the vehicle should operate in a certain way under the given

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3

Dongmo, Jean Etienne Temgoua Kwatny Harry G. "Aircraft loss-of-control prevention and recovery : a hybrid control strategy /." Philadelphia, Pa. : Drexel University, 2010. http://hdl.handle.net/1860/3252.

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4

Chapa, Gordero Felisa. "Polarization Dependent Loss (PDL) in Polarization Multiplexed and Hybrid Optical Networks." Thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2007. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9528.

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<p>Study of the Polarization Dependent Loss caused by the combined effect of orthogonality degradation and dynamic power fluctuations in a hybrid network, which combines circuit switching with packet switching to transmit applications with very different quality requirements on the same wavelength channel.</p>

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Bilen, Cagdas. "A Hybrid Approach For Full Frame Loss Concealment Of Multiview Video." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608559/index.pdf.

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Multiview video is one of the emerging research areas especially among the video coding community. Transmission of multiview video over an error prone network is possible with efficient compression of these videos. But along with the studies for efficiently compressing the multiview video, new error concealment and error protection methods are also necessary to overcome the problems due to erroneous channel conditions in practical applications. In packet switching networks, packet losses may lead to block losses in a frame or the loss of an entire frame in an encoded video sequence. In recent

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6

U-yen, Kongpop. "Microwave filters with high stop-band performance and low-loss hybrid developement." Diss., Available online, Georgia Institute of Technology, 2006, 2006. http://etd.gatech.edu/theses/available/etd-11162006-111102/.

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Thesis (Ph. D.)--Electrical and Computer Engineering, Georgia Institute of Technology, 2007.<br>Tentzeris, Manos, Committee Member ; Wollack, Edward, Committee Member ; Cressler, John, Committee Member ; Papapolymerou, Ioannis, Committee Chair ; Laskar, Joy, Committee Co-Chair ; Ayazi, Farrokh, Committee Member.

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Johnson, Eric K. "Low Loss Hybrid Waveguide Electric Field Sensor Based on Optical D-fiber." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2153.pdf.

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8

Araci, Ismail E. "LOW-LOSS, HIGH PERFORMANCE HYBRID PHOTONICS DEVICES ENABLED BY ION-EXCHANGED GLASS WAVEGUIDES." Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/195837.

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Robust ion-exchanged glass waveguides exhibit low optical losses in a broad spectral range and they allow integration of several devices on the same chip due to their planar structure. Consequently, they can be a low cost alternative to semiconductors for fabricating various integrated optical devices. Two high performance photonic devices were designed and realized, demonstrating the potential of glass waveguides. The well-controlled silver-film ion-exchange process allowed the fabrication of: i) a highly sensitive biosensor based on optical absorption and, ii) a low loss hybrid electro-opt

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9

Baker, Jose Enrique. "Measurements of leakage, power loss and rotordynamic force coefficients in a hybrid brush seal." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2767.

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10

Zhao, Yue. "Automatic Prevention and Recovery of Aircraft Loss-of-Control by a Hybrid Control Approach." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1458728101.

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11

Williams, Paul Timothy. "Acoustic performance of dissipative and hybrid silencers in ducts with large transverse dimensions." Thesis, Brunel University, 2015. http://bura.brunel.ac.uk/handle/2438/13745.

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Numerical models will be developed for the prediction of silencer transmission loss under the operating conditions present in gas turbine exhausts. In these systems the large diameter ducts and high operating temperatures produce a challenging acoustic environment due to the unverified behaviour of fibrous materials at high temperatures and the existence of complex sound fields. To understand the behaviour of fibrous materials at high temperatures their bulk acoustic properties are measured using a modified impedance tube which can heat material samples up to a temperature of 500 C. It will be

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Johnson, Kurt M. "A Plug-in Hybrid Electric Vehicle Loss Model to Compare Well-to-Wheel Energy Use from Multiple Sources." Thesis, Virginia Tech, 2008. http://hdl.handle.net/10919/33968.

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Hybrid electric vehicles (HEV) come in many sizes and degrees of hybridization. Mild hybrid systems, where a simple idle stop strategy is employed, eliminate fuel use for idling. Multiple motor hybrid systems with complex electrically continuously variable transmissions in passenger cars, SUVs and light duty trucks have large increases in fuel economy. The plug-in hybrid electric vehicle (PHEV) takes the electrification of the automobile one step further than the HEV by increasing the battery energy capacity. The additional capacity of the battery is used to propel the vehicle without using

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SCHUTZMANN, STEFANO. "Towards hybrid sol-gel devices for optoelectronic biosensors." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2006. http://hdl.handle.net/2108/202687.

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I sensori per la rilevazione di sostanze inquinanti in acqua, terra e atmosfera così come i dispositivi biosensori per l’identificazione di proteine ed enzimi, rappresentano un interessantissimo ambito di ricerca con forti applicazioni in campo industriale. In questo contesto, una promettente possibilità è rappresentata dallo sviluppo di sensori basati sull’optoelettronica dato che essi assicurano un’alta sensibilità, una buona stabilità meccanica, la possibilità di miniaturizzare i dispositivi e di produrli su larga scala. In particolare, negli ultimi anni molti sforzi sono stati orientati al

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14

Halbach, Till. "Error-robust coding and transformation of compressed hybered hybrid video streams for packet-switched wireless networks." Doctoral thesis, Norwegian University of Science and Technology, Faculty of Information Technology, Mathematics and Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-136.

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<p>This dissertation considers packet-switched wireless networks for transmission of variable-rate layered hybrid video streams. Target applications are video streaming and broadcasting services. The work can be divided into two main parts.</p><p>In the first part, a novel quality-scalable scheme based on coefficient refinement and encoder quality constraints is developed as a possible extension to the video coding standard H.264. After a technical introduction to the coding tools of H.264 with the main focus on error resilience features, various quality scalability schemes in previous researc

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Jaberansary, Ehsan. "New computational method to estimate the effect of roughness on scattering loss and its implementation in a hybrid heterojunction optical modulator." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/368779/.

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In the past year, there has been an advancement in the development of optical active and passive Silicon-On-Insulator for Photonic Integrated Circuits (PICs) applications. Following the continuous miniaturisation trend in this technology the study of the loss performance of these devices also become an attractive subject. Among the many components silicon based optical modulators are specifically important for low loss and high bandwidth short reach interconnects. The general aim of this thesis is to design and computationally investigate the performance of a multilayer hybrid silicon modulato

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Bakare, Adeyinka A. "A Methodology for Cyberthreat ranking: Incorporating the NIST Cybersecurity Framework into FAIR Model." University of Cincinnati / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1583247043269043.

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17

Leung, Joseph, Michio Aoyagi, Donald Billings, Herbert Hoy, Mei Lin, and Fred Shigemoto. "A MOBILE RANGE SYSTEM TO TRACK TELEMETRY FROM A HIGH-SPEED INSTRUMENTATION PACKAGE." International Foundation for Telemetering, 1998. http://hdl.handle.net/10150/607380.

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International Telemetering Conference Proceedings / October 26-29, 1998 / Town & Country Resort Hotel and Convention Center, San Diego, California<br>As renewal interest in building vehicles based on hypersonic technologies begin to emerge again, test ranges anticipating in supporting flight research of these vehicles will face a set of engineering problems. Most fundamentals of these will be to track and gather error free telemetry from the vehicles in flight. The first series of vehicles will likely be reduced-scale models that restrict the locations and geometric shapes of the telemetr

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18

Kulhány, Andrej. "Zkoumání vlivu přítlaku na životnost olověných akumulátorů pro hybridní elektrická vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218570.

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The thesis is focused on remitting lead-acid segments of partial charge mode which simulates the conditions in HEV. The experimental cells were submitted to different pressures on the electrode system. The main aim of the thesis was to minimize the irreversible sulphating of the negative electrodes, which are in the PSoC regime limiting in the overall life of lead-acid accumulators. All cells were submitted to measurement of the negative electrode potentials, resistance of active materials, contact resistance of the grid – the active material and measurements of pressure changes during three P

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19

Li, Li. "Etude et mise au point d'une nouvelle famille d'alterno-démarreur pour véhicules hybrides et électriques." Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00639305.

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Les travaux de cette thèse portent sur une nouvelle structure de machine à double excitation (MSDE) pour l'application des véhicules hybrides et électriques. Ce type de machine, ayant deux sources d'excitation, bénéficie un degré de liberté supplémentaire et un contrôle facile sur le flux. Grâce à ce degré de liberté, la machine peut être dimensionnée de manière que son meilleur rendement coïncide avec la zone de fonctionnement la plus sollicitée de la machine. Cette nouvelle structure a fait l'objet principal de ce mémoire. Le fonctionnement de la MSDE est présenté dans les deux premiers chap

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Foglia, Laura [Verfasser], Martin [Akademischer Betreuer] Wolf, Ulrike [Gutachter] Woggon, and Julia [Gutachter] Stähler. "Ultrafast dynamics and energy loss channels at a hybrid organic inorganic interface / Laura Foglia ; Gutachter: Ulrike Woggon, Julia Stähler ; Betreuer: Martin Wolf ; Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin." Berlin : Technische Universität Berlin, 2015. http://d-nb.info/1156012805/34.

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TEIXEIRA, MONTEIRO ANTONIO MANUEL. "ASSESSMENT OF ECOLOGICAL CONDITIONS OF PERMANENT MEADOWS IN THE ITALIAN ALPS: LOSS, BIODIVERSITY AND REMOTE SENSING CHANGE DETECTION." Doctoral thesis, Università degli Studi di Milano, 2011. http://hdl.handle.net/2434/152908.

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The monitoring of ecological condition of grasslands ecosystems in the European Alps is a main issue for mountain regions, since the abandonment of traditional and sustainable management practices has exposed grassland habitat to significant impacts in a context of global environmental change. The present research project was focused in assessment of the state of permanent meadows in the lowlands of Valtellina Valley (80 km2), Italian Alps, during the timeframe 1980-2000. In specific, it quantified the land use/land cover changes and identified main drivers behind permanent meadows loss

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22

Alimonti, Luca. "Développement d'une méthode hybride éléments finis-matrice de transfert pour la prédiction de la réponse vibroacoustique de structures avec traitements acoustiques." Thèse, Université de Sherbrooke, 2014. http://hdl.handle.net/11143/5988.

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Résumé : Les véhicules aériens et terrestres sont constitués de systèmes bâtis complexes. La structure principale est généralement composée de panneaux légers renforcés par des éléments rigides. Cette solution de conception est répandue parce qu’elle allie la force et un faible poids. Cependant, on sait qu’elle offre des résultats vibroacoustiques médiocres, c’est à dire que l’effet des perturbations externes qui touchent le système peut générer un niveau de bruit excessif à l’intérieur de la cabine des passagers. C’est une préoccupation majeure chez les fabricants, parce que ce niveau de brui

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23

Mikoláš, Jiří. "Zkoumání vlivu velikosti aditiv záporné aktivní hmoty na životnost olověného akumulátoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218566.

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The task of research work is to study new mechanisms and to minimize disturbance of lead batteries for hybrid electric vehicles. Those arising under the PSoC (Partial State of Charge) and is linked to irreversible sulphation mainly negative electrodes. As one solution to prevent sulphation of the negative electrode appears to be the active ingredients in a negative matter. In the investigated electrodes is verified the influence of carbon, titanium dioxide and silica on the grain size of the order of nanometers.

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Vystrčil, Marek. "Zkoumání příčin předčasné ztráty kapacity v olověných akumulátorech pro hybridní elektrická vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218569.

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This thesis describes the results of two successive experiments. The first was focused on the influence of impurities in the active mass of negative electrode in PSoC (Partial State of Charge) mode, which simulates the conditions occurring in HEV (hybrid electric vehicle). In the second experiment, cells with the same additives were exposed to optimum downforce 4N/cm2, by which we wanted to prove the influence of pressure on life of VRLA (Valve Regulated Lead Acid) cells working in operating HEV conditions.

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Svoboda, Marek. "Vliv přítlaku v olověných akumulátorech pro hybridní elektrická vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2011. http://www.nusl.cz/ntk/nusl-218939.

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Lead-acid batteries of hybrid electric vehicles (HEV) are functioning in PSoC regime (Partial State of Charge). In PSoC regime new fail mechanisms occur. These mechanisms usually lead to nonreversible sulphation of negative electrodes. Main aim of this research is to avoid negative electrode sulphation and to improve lifetime of lead-acid accumulators used in HEV.

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26

Azgin, Aytac. "Service quality assurance for the IPTV networks." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/48961.

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The objective of the proposed research is to design and evaluate end-to-end solutions to support the Quality of Experience (QoE) for the Internet Protocol Television (IPTV) service. IPTV is a system that integrates voice, video, and data delivery into a single Internet Protocol (IP) framework to enable interactive broadcasting services at the subscribers. It promises significant advantages for both service providers and subscribers. For instance, unlike conventional broadcasting systems, IPTV broadcasts will not be restricted by the limited number of channels in the broadcast/radio spectrum. F

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Klaner, Pavel. "Vliv aditiv v olověných akumulátorech pro hybridní elektrická vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219876.

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This thesis deals with issues of the issue lead-acid batteries and their application in mode of hybrid electric vehicle. The experiment is focused on the production of electrodes to determine the effect five types of additives in negative active mass in PsoC(Partial State of Charge) mode. This simulates conditions occurring in the mode of hybrid electric vehicles (HEV).

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Klojda, Viktor. "Vliv skelných vláken v olověných akumulátorech pro hybridní elektrická vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219872.

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Master´s thesis deals with the utilization of lead-acid accumulators in hybrid electric vehicle regime. It describes the side effects known as PCL, generated during PSOC regime and connected with the length of the battery lifespan. One possibility how to eliminate these effects, is the use of additives in active mass of the negative electrode, in the form of glass fibres. The project provides the parametres and reactions of additive, that have lead to the improvement of battery properties. The purpose of this thesis is to verify the positive effect of the aditive on the lifespan of the lead-ac

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Konečný, Zdeněk. "Vliv oxidu titaničitého na vlastnosti olověných akumulátorů pracujících v režimu hybridních vozidel." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219871.

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This work deals with lead-acid batteries operating in hybrid electric vehicles mode, i.e. in a partial state of charge. The adverse effects such as premature capacity loss and large internal resistance can markedly affect the life of a lead battery. The experiment described in this work aims to clarify the influence of the titanium dioxide in the active mass of negative electrodes especially in the life of lead acid batteries.

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Nie, Chunyang. "Etude de nanocristaux unidimensionnels confinés dans des nanotubes de carbone." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30214/document.

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Le remplissage des nanotubes de carbone (NTC) est considéré comme une approche relativement simple permettant de synthétiser des nanocristaux du fait de l'effet de confinement 1D imposé par la cavité centrale des NTC, qui peut être seulement de l'ordre du nanomètre ou moins, notamment dans le cas des NTC monoparoi et en particulier des NTC biparois (DWCNT) sur lesquels nous avons concentré nos efforts. De tels nanocristaux devraient avoir des propriétés physiques (électriques, magnétiques) différentes de celles de leurs équivalents à l'état massif du fait de la modification de la coordinence d

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Tobolák, Jakub. "Vliv vodivých keramik na životnost olověných akumulátorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2014. http://www.nusl.cz/ntk/nusl-220971.

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This thesis is focused on lead-acid batteries used in hybrid electric vehicles. These cells work in specific conditions, particularly under partial charge referred to as PSOC. This fact is responsible for the premature loss of capacity cell lead-acid batteries and their short lifetime. The task of this thesis is to examine the effect of conductive ceramics as possible additives to the negative electrode active materials of lead-acid battery cells operating in a PSOC, in order to prolong their life.

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Zhao, Zhou. "Heart Segmentation and Evaluation of Fibrosis." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS003.

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La fibrillation auriculaire est la maladie du rythme cardiaque la plus courante. En raison d'un manque de compréhension des structures atriales sous-jacentes, les traitements actuels ne sont toujours pas satisfaisants. Récemment, avec la popularité de l'apprentissage profond, de nombreuses méthodes de segmentation basées sur l'apprentissage profond ont été proposées pour analyser les structures auriculaires, en particulier à partir de l'imagerie par résonance magnétique renforcée au gadolinium tardif. Cependant, deux problèmes subsistent : 1) les résultats de la segmentation incluent le fond d

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Bellanger, Adrien. "Ordonnancement sur les machines à traitement par batches et contraintes de compatibilité." Phd thesis, Institut National Polytechnique de Lorraine - INPL, 2009. http://tel.archives-ouvertes.fr/tel-00606383.

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Dans cette thèse, nous avons traité les problèmes d'ordonnancement d'ateliers de type flow- shop hybride à deux étages avec machines à traitement par batches sur le second étage et compatibilité entre les tâches. Les durées opératoires des tâches sont données par des intervalles, et les tâches sont dites compatibles si elles partagent une même durée d'exécution. Pour le problème de minimisation de la date de fin d'ordonnancement de ce type d'atelier, nous avons développé 6 heuristiques à performances garanties. D'après les expériences réalisées, ces heuristiques sont efficaces sur de grandes i

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Esgin, Eren. "A Hybrid Methodology In Process Modeling:." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610461/index.pdf.

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The managing of complex business processes, which are changed due to globalization, calls for the development of powerful information systems that offer generic process modeling and process execution capabilities. Even though contemporary information systems are more and more utilized in enterprises, their actual impact in automatizing complex business process is still limited by the difficulties encountered in design phase. Actually this design phase is time consuming, often subjective and incomplete. In the scope of this study, a reverse approach is followed. Instead of starting with process

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Masoudi, Pedram. "Application of hybrid uncertainty-clustering approach in pre-processing well-logs." Thesis, Rennes 1, 2017. http://www.theses.fr/2017REN1S023/document.

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La thèse est principalement centrée sur l'étude de la résolution verticale des diagraphies. On outre, l'arithmétique floue est appliquée aux modèles expérimentaux pétrophysiques en vue de transmettre l'incertitude des données d'entrée aux données de sortie, ici la saturation irréductible en eau et la perméabilité. Les diagraphies sont des signaux digitaux dont les données sont des mesures volumétriques. Le mécanisme d'enregistrement de ces données est modélisé par des fonctions d'appartenance floues. On a montré que la Résolution Verticale de la Fonction d'Appartenance (VRmf) est supérieur d'e

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Brown, Sarah(Sarah Dalton). "Hybrid-industrial zoning : a case study in Downtown Los Angeles." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122271.

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Thesis: M.C.P., Massachusetts Institute of Technology, Department of Urban Studies and Planning, 2019<br>Thesis: S.M. in Real Estate Development, Massachusetts Institute of Technology, Program in Real Estate Development in conjunction with the Center for Real Estate, 2019<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 89-93).<br>Historically, land use planning has treated industrial land uses either antagonistically or ambivalently. Traditional zoning approaches have restricted, regulated, spatially isolated, and pushed industrial land to the periphery o

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Bellanger, Adrien. "Ordonnancement sur les machines à traitement par batches et contraintes de compatibilité." Electronic Thesis or Diss., Vandoeuvre-les-Nancy, INPL, 2009. http://www.theses.fr/2009INPL087N.

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Dans cette thèse, nous avons traité les problèmes d'ordonnancement d'ateliers de type flowshop hybride à deux étages avec machines à traitement par batches sur le second étage et compatibilité entre les tâches.Les durées opératoires des tâches sont données par des intervalles, et les tâches sont dites compatibles si elles partagent une même durée d'exécution. Pour le problème de minimisation de la date de fin d'ordonnancement de ce type d'atelier, nous avons développé 6 heuristiques à performances garanties. D'après les expériences réalisées, ces heuristiques sont efficaces sur de grandes inst

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Lejeune, Arthur. "Développement d’un modèle hybride pour l’inspection in-situ de singularités lors de drapage automatisé de composites à matrice organique." Electronic Thesis or Diss., Paris, ENSAM, 2024. http://www.theses.fr/2024ENAME071.

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L’objectif initial de la thèse est de développer un ensemble d’outils permettant la construction du jumeau numérique d’une cellule de drapage AFP. Ces travaux de thèse se sont focalisés sur l’inspection de la qualité de drapage en analysant les données mesurées sur le système. Un premier travail de collecte, de traitement et de fusion a permis de construire une base de données expérimentale. La qualité du drapage est estimée par des méthodes d’inspection in-situ par imagerie infrarouge et par laser. Une approche par des modèles hybrides couplant un modèle physique et l’apprentissage machine es

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Baudoin, Romain. "Analyse du bruit lors de la génération de somme de fréquences dans les cristaux de niobate de lithium périodiquement polarisés (PPLN) et applications en régime de comptage de photons." Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0068/document.

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Le processus de somme de fréquences optiques est utilisé dans certaines applications pour convertir des signaux de longueurs d’onde infrarouges vers le domaine de longueurs d’onde visibles. Cela permet de bénéficier de technologies plus performantes notamment en terme de détection et de propagation. Les travaux menés dans cette thèse s’intéressent à l’étude de phénomènes optiques parasites générés par ce processus non linéaire dans des cristaux de niobate de lithium périodiquement polarisés (PPLN) pour des applications de conversion de fréquences en régime de comptage de photons. La première p

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Oliveira, Sueyde Fernandes de. "Use efficiency of controlled release fertilizer on the growth of croton and petunia and N loss by leaching." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/11/11136/tde-10052016-134408/.

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The market of flowers and ornamentals such as croton (Codiaeum variegatum) and petunia (Petunia×hybrida Vilm.-Andr) have been created new technologies to constantly development, as one of the most promising segments of horticulture. Fertilization providing adequate nutrition and less leaching to the environment is the objective of numerous studies around the world. Therefore, two studies were conducted to evaluate the use of controlled release fertilizer (CRF) on the growth of two ornamental species, and N loss by leaching. The first experiment aim to evaluate sources and rates of CRF and wate

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Barthes, Julien. "Adressage et contrôle de nanosources optiques par plasmonique intégrée ou fibrée." Thesis, Dijon, 2015. http://www.theses.fr/2015DIJOS011/document.

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Les plasmons polaritons de surface, modes supportés par des nanostructures métalliques permettent de confiner la lumière à des échelles sub-longueurs d’onde. En s’affranchissant de la limite de diffraction, ces modes constituent des pistes intéressantes pour l’adressage et le contrôle de nanosources optiques (molécules, boites quantiques...). Par exemple, un nanofil métallique constitue un guide plasmonique unidimensionnel qui permet d’exciter une nanosource ou encore de coupler deux émetteurs avec des applications possibles pour la réalisation de composants nano-optiques intégrés. En revanche

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Tkachenko, Iuliia. "Contribution à la compréhension et à la modélisation des phénomènes physiques se produisant lors d'un assemblage par procédé hybride laser-arc." Thesis, Dijon, 2015. http://www.theses.fr/2015DIJOS012.

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Ces travaux présentent une recherche sur la physique du soudage hybride. La revue littéraire décrit les principaux processus physiques se produisant au cours de la combinaison Laser-arc, les principales réalisations et les problèmes rencontrés lors de l'analyse de ces processus. Les processus ont été étudiés pendant l'assemblage de matériaux de fortes épaisseurs. Deux configurations ont été utilisées. La première est le soudage d’un acier Superduplex en un seul passage, par Laser et arc distanciés. La seconde configuration est le soudage multipasse de l'acier 18MND5, où le faisceau Laser défoc

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Bargshady, Nader. "Precise Tracking of Things via Hybrid 3-D Fingerprint Database and Kernel Method Particle Filter." Digital WPI, 2017. https://digitalcommons.wpi.edu/etd-dissertations/361.

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"Precise Tracking of Things (PToT) using RF signals has posed a serious challenge in an indoor environment. The precision localization information is an enabler for better coordinated-tasks and is essential for a successful launch of many emerging applications. PToT relies on two principal components, a novel navigation (tracking) algorithm, and a hybrid 3D fingerprint database. In this dissertation, we begin by using the two widely known ranging techniques, Time Of Arrival (TOA) associated with Ultra-wideband (UWB) and Received Signal Strength (RSS) with WiFi signals. First, we use the theore

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Gregorio, Jean-Loup. "Contribution à la définition d'un jumeau numérique pour la maîtrise de la qualité géométrique des structures aéronautiques lors de leurs processus d'assemblage." Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASN008.

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Les opérations d'assemblage de structures aéronautiques font aujourd'hui appel à une planification particulière se basant sur la maquette numérique des produits considérés. Pour permettre une bonne réalisation de ces opérations, la géométrie du produit physique doit rester aussi fidèle que possible à la géométrie de référence contenue dans la maquette numérique. Du fait de la complexité des produits considérés, des écarts géométriques non-anticipés peuvent cependant apparaitre et occasionner un allongement des délais et une augmentation des coûts d’assemblage.L’intégration croissante de systèm

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Motoc, Dana. "Development of green composites based on epoxidized vegetable oils (EVOs) with hybrid reinforcements: natural and inorganic fibers." Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/90399.

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The main aim of this work id to provide integral methods to predict and characterize the properties of composite structures based on hybrid polymers and reinforcements, that could lead to useful results from an industrial point of view. This is addressed, if possible, by theoretical predictions of the effective properties by using the available experimental data. The first part is focused on the scientific achievements of the author that allowed a quantitative characterization of the main effective properties of several composite architectures from hybrid polymers and reinforcements, based on

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Pereira, Miguel Ramos. "Time diversity solutions to cope with lost packets." Doctoral thesis, Faculdade de Ciências e Tecnologia, 2012. http://hdl.handle.net/10362/9368.

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A dissertation submitted to Departamento de Engenharia Electrotécnica of Faculdade de Ciências e Tecnologia of Universidade Nova de Lisboa in partial fulfilment of the requirements for the degree of Doctor of Philosophy in Engenharia Electrotécnica e de Computadores<br>Modern broadband wireless systems require high throughputs and can also have very high Quality-of-Service (QoS) requirements, namely small error rates and short delays. A high spectral efficiency is needed to meet these requirements. Lost packets, either due to errors or collisions, are usually discarded and need to be retransm

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Granato, Giovanni. "Optimisation de Lois de Gestion Énergétiques des Véhicules Hybrides." Phd thesis, Ecole Polytechnique X, 2012. http://tel.archives-ouvertes.fr/tel-00788160.

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L'objectif de ce travail consiste à appliquer des techniques de contrôle optimal pour améliorer la performance des lois de gestion d'énergie. Plus précisément, les techniques étudiées sont les solutions de viscosité de l'équation de Hamilton-Jacobi, des méthodes level-set pour l'étude de l'atteignabilité, la programmation dynamique stochastique, la programmation dynamique stochastique duale et les contraintes en probabilité. En premier lieu, ce document débute avec la présentation des outils techniques et modèles nécessaires à l'étude de l'optimisation des lois de gestion d'énergie au sein des

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Dang, Weidong. "Finite element modelling of hybrid (spot welded/bonded) joints under service conditions." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2187/document.

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Le soudage par point et le collage sont largement utilisés dans la jonction des tôles, telles que l'assemblage de caisses de voiture. Récemment, le soudage par point et le collage ont été combinés pour faire le joint hybride soudé-collé, qui est utilisé pour joindre les aciers à hautes résistances et améliorer la rigidité et la résistance aux chocs des corps de voiture. Dans l'industrie, l'évaluation de la conception avant prototype nécessite des modèles fiables de comportement en termes de prédiction des comportements mécaniques. Le modèle élément finis de joint soudé-collé est un nouveau déf

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Orság, Petr. "Mikropáskové vazební směrové a hybridní členy - laboratorní úloha." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217669.

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The diploma thesis deals with the elaboration of a laboratory experiment with basic types of microstrip directional and hybrid couplers in the frequency range up to tens GHz. The thesis is concerned on branch line directional coupler, rat-race directional coupler, De Rondeho coupler, coupled-line coupler, and Lange directional coupler. Simulated results are confronted with measured results obtained by a skalar network analyzer. From overall findings the relevant laboratory experiment was configured and designed.

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Brahim, El Hacen. "Apport des outils d'optimisation pour l'identification des lois de comportement mécanique des matériaux." Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10016/document.

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L'objectif de cette thèse est l’implémentation d'algorithmes d'optimisation pour l'identification du comportement mécanique des matériaux. Ces outils sont considérés ici pour automatiser la recherche des paramètres des lois mécaniques implémentés dans un calcul en éléments finis (EF) et diminuer le nombre de calculs nécessaires pour résoudre le problème d’identification. La base de données expérimentale comprend des réponses mécaniques en flexion et en indentation instrumentée qui sont utilisés pour l’identification du comportement d’un biocomposite et d'une variété de métaux. Plusieurs approc

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