Дисертації з теми "MLIR"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "MLIR".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Hsiao, Roger Wend Huu. "Kernel eigenspace-based MLLR adaptation /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?COMP%202004%20HSIAO.
Повний текст джерелаPompougnac, Hugo. "Spécification et compilation de réseaux de neurones embarqués." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS436.
Повний текст джерелаIn this thesis, we propose an approach for the joint specification and compilation of both High-Performance Computing (HPC) and Real-Time Embedded (RTE) aspects of a system. Our approach is based on a formal, algorithmic and tooled integration between two formalisms underlying a large part of works in HPC and RTE fields: the SSA formalism and the synchronous dataflow language Lustre. The SSA formalism is a key component of many HPC compilers, including those used by Machine Learning frameworks such as TensorFlow or PyTorch. The Lustre language is a key component of implementation processes of critical embedded systems in avionics or rail transportation
Starefors, Henrik, and Rasmus Persson. "MLID : A multilabelextension of the ID3 algorithm." Thesis, Blekinge Tekniska Högskola, Institutionen för programvaruteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13667.
Повний текст джерелаMandal, Arindam. "Transformation sharing strategies for MLLR speaker adaptation /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/6087.
Повний текст джерелаTan, Jiak-San. "Flexibility in MLVR-VSC back-to-back link." Thesis, University of Canterbury. Electrical and Computer Engineering, 2006. http://hdl.handle.net/10092/1119.
Повний текст джерелаDas, Bhaba Priyo. "Design and development of Thyristor based MLCR CSC." Thesis, University of Canterbury. Electrical Engineering, 2014. http://hdl.handle.net/10092/9428.
Повний текст джерелаRabaa, Seham. "Elucidating the Functional Role of MLIP, a Novel Muscle A-type Lamin Interacting Protein." Thèse, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20027.
Повний текст джерелаYamak, Mohamad Walid. "Onduleur MLI à transition à tension nulle." Thèse, Université du Québec à Trois-Rivières, 1995. http://depot-e.uqtr.ca/4959/1/000623060.pdf.
Повний текст джерелаSaleh, Fawaz. "The Characterization of the Molecular Structure and the Partners of MLIP." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/33165.
Повний текст джерелаFanner, Robert M. "Analysis and implementation of the speaker adaptation techniques : MAP, MLLR, and MLED." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52653.
Повний текст джерелаENGLISH ABSTRACT: The topic of this thesis is speaker adaptation, whereby speaker-independent speech models are adapted to more closely match individual speakers by utilising a small amount of data from the targeted individual. Speaker adaptation methods - specifically, the MAP, MLLR and MLED speaker adaptation methods - are critically evaluated and compared. Two novel extensions of the MLED adaptation method are introduced, derived and evaluated. The first incorporates the explicit modelling of the mean speaker model in the speaker-space into the MLED framework. The second extends MLED to use basis vectors modelling inter-class variance for classes of speech models, instead of basis vectors modelling inter-speaker variance. An evaluation of the effect of two different types of feature vector - PLP-cepstra and LPCCs - on the performance of speaker adaptation is made, to determine which feature vector is optimal for speaker-independent systems and the adaptation thereof.
AFRIKAANSE OPSOMMING: Die onderwerp van hierdie tesis is spreker-aanpassing, dit wil sê, die verandering van 'n spreker-onafhanklike spraakmodel om nader aan 'n spreker-afhanklike model vir 'n individu te wees, gegewe 'n klein hoeveelheid spraakdata van die individu. Die volgende sprekeraanpassing-metodes word geëvalueer: MAP, MLLR en MLED. Twee nuwe uitbreidings vir die MLED-metode word beskryf, afgelei en geëvalueer. Die eerste inkorporeer die eksplisiete modellering van die gemiddelde sprekermodel van die sprekerruimte in die MLED metode. Die tweede uitbreiding maak gebruik van basisvektore vir MLED wat vanaf die interklas-variansie tussen 'n stel sprekerklasse in plaas van die interspreker-variansie afgelei is. Die effek van twee tipes kenmerk-vektore - PLP-kepstra en LPCC's - op die prestasie van sprekeraanpassings-metodes word ondersoek, sodat die optimale tipe kenmerk-vektor vir spreker-onafhanklike modelle en hul aanpassing gevind kan word.
Cárdenas, Ríos Jimena. "MLIS - construcción de instrumento para medir el liderazgo en estudiantes de secundaria." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2016. http://tesis.pucp.edu.pe/repositorio/handle/123456789/8463.
Повний текст джерелаTesis
Cambronne, Jean-Pascal. "Moteur asynchrone alimenté par un onduleur de courant à MLI." Lille 1, 1990. http://www.theses.fr/1990LIL10146.
Повний текст джерелаKakkad, Aman. "Machine Learning for Automated Theorem Proving." Scholarly Repository, 2009. http://scholarlyrepository.miami.edu/oa_theses/223.
Повний текст джерелаGuzman, Serrano Eusebio. "Conception et application d'un onduleur triphasé à MLI au pompage photovoltai͏̈que." Aix-Marseille 3, 1996. http://www.theses.fr/1996AIX30127.
Повний текст джерелаCapitaneanu, Stefan Laurentiu. "Optimisation de la fonction MLI d'un onduleur de tension deux-niveaux." Toulouse, INPT, 2002. http://ethesis.inp-toulouse.fr/archive/00000637/.
Повний текст джерелаCapitaneanu, Stefan Laurentiu Fornel Bernard de. "Optimisation de la fonction MLI d'un onduleur de tension deux-niveaux." Toulouse : INP Toulouse, 2008. http://ethesis.inp-toulouse.fr/archive/00000637.
Повний текст джерелаNonnon, Philippe. "Contribution à l'étude d'un redresseur à MLI à perturbations minimales du réseau." Vandoeuvre-les-Nancy, INPL, 1991. http://www.theses.fr/1991INPL005N.
Повний текст джерелаRioual, Pascal. "Modélisation et commande d'un redresseur à MLI alimenté par un réseau déséquilibré." Cachan, Ecole normale supérieure, 1993. http://www.theses.fr/1993DENS0008.
Повний текст джерелаCoêlho, Roger William. "Gaia-Mlis : uma abordagem aplicada a um diagnóstico de nível de maturidade em segurança da informação." Universidade Estadual de Londrina. Centro de Ciências Exatas. Programa de Pós-Graduação em Ciência da Computação, 2016. http://www.bibliotecadigital.uel.br/document/?code=vtls000207604.
Повний текст джерелаThe protection of information with strategic management as well as of physical assets and people, is considered as important assets for the development, implementation and continuation of the business. Managing security risk is a difficult task, but to find success, investment in support and technology management should be done, besides the verification of the maturity level of information security system, which aims to identify the strengths and weaknesses in the evaluation processes. Thus, the GAIA-MLIS model is proposed to analyze what is the maturity level in information security and how organizations can improve their processes and metrics. This approach aims to make a diagnostic evaluation in five areas related to Information and Communication Technology services, identifying strengths and weaknesses in the processes, implemented security standards and policies. This assessment will be used to identify and suggest points of improvement based on the proposed security maturity approach.
Robert-Dehault, Étienne. "Modélisation dynamique, commande et conception de machines pentaphasées alimentées par des onduleurs MLI." Nantes, 2005. http://www.theses.fr/2005NANT2119.
Повний текст джерелаMarescotti, Paolo. "SLR vs MLR network: finding a trade-off between performance and energy-efficency." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2012. http://amslaurea.unibo.it/4367/.
Повний текст джерелаMerabet, Kamel. "Commande MLI d'un ondulateur triphasé basée sur la dispersion de la tension triphasée." Thèse, Université du Québec à Trois-Rivières, 2011. http://depot-e.uqtr.ca/4463/1/030300524.pdf.
Повний текст джерелаSournac, Éric. "Variateur de vitesse pour machine asynchrone : commande numérique et stratégies MLI : optimisation des modulations." Toulouse, INPT, 1990. http://www.theses.fr/1990INPT077H.
Повний текст джерелаDepernet, Daniel. "OPTIMISATION DE LA COMMANDE D'UN ONDULEUR MLI A TROIS NIVEAUX DE TENSION POUR MACHINE ASYNCHRONE." Phd thesis, Université de Reims - Champagne Ardenne, 1995. http://tel.archives-ouvertes.fr/tel-00828554.
Повний текст джерелаOstojski, Michel. "Sur les interactions des deux MLI d'une conversion réversible alternatif fréquence fixe, alternatif fréquence variable." Lille 1, 1994. http://www.theses.fr/1994LIL10114.
Повний текст джерелаBouafia, Abdelouahab. "Techniques de commande prédictive et floue pour les systèmes électroniques de puissance : application aux redresseurs MLI." Poitiers, 2010. http://www.theses.fr/2010POIT2297.
Повний текст джерелаThis work deals with harmonic elimination in electrical energy distribution networks. In fact, harmonic pollution has become a major field of concern in modern industry. It is usually caused by non linear loads, which draw non sinusoidal current from the network. Current harmonics are mainly caused by static converters, especially diode and thyristor rectifiers, because they have a non linear behaviour and represent the main source of currents harmonics injection. Therefore, some measures must be taken in order to reduce current harmonic distortion caused by this equipment. In this field, the advanced preventive solutions adopted, other than active filters which are curative method, is to substitute the conventional rectifiers with new structures of AC / DC non-polluting converters, which have resistive behaviour towards the network. This research work contributes to the control of PWM rectifier with sinusoidal current absorption. That is why, various control strategies have been developed for this converter in order to obtain an efficient control of the DC bus voltage and nearly sinusoidal input current waveforms. These strategies are based either on direct control of input currents or direct power control (DPC). Moreover, they are combined with advanced controls like approaches with fuzzy logic and predictive control applied to the two preceding methods. Simulations presented in this work are performed with Matlab/SimulinkTM tools, and practical implementation in real time has been done through a system controller board dSPACE 1104
Thiesen, Hugues. "Onduleur MLI à commutation douce : application à la génération électrique : étude et réalisation de la commande." Toulouse, INPT, 1996. http://www.theses.fr/1996INPT015H.
Повний текст джерелаTERRIEN, FRANCK. "Commande d'une machine synchrone double etoile, alimentee par des onduleurs mli modelisation, simulation et prototype experimental." Nantes, 2000. http://www.theses.fr/2000NANT2106.
Повний текст джерелаPeyrelong, Marie-France. "Réorganisation de la salle de lecture et de documentation de la maison du livre, de l'image et du son François-Mitterrand de Villeurbanne." [S.l.] : [s.n.], 2003. http://www.enssib.fr/bibliotheque/documents/dcb/M-2003-PRO-13-mlis-vol1.pdf.
Повний текст джерелаKlingefjord, Ylva. "Teoretisk beräkning av bränsleförångningshastigheten vid pölbränder : En analys av ekvationen 𝑚̇ " = 𝑚̇ ∞ " (1 − 𝑒 −𝑘𝛽𝐷)". Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-79240.
Повний текст джерелаLe, Quyet. "A study with a three-step method regarding countries happiness : An analysis with EFA, CFA AND MLR." Thesis, Uppsala universitet, Statistiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385880.
Повний текст джерелаMessaoudi, Mehdi. "Stratégie de modulation pour la réduction des perturbations conduites générées par un variateur de vitesse à redresseur MLI." Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10148/document.
Повний текст джерелаThe adjustable speed drives (ASDs) use the static converters that allow varying the speed of the three phase electrical motors. However, these converters are the main source of the common mode conducted emissions. The objective of this research work focuses on the reduction of conducted emissions, through the development of a new control strategy based on pulse width modulation (PWM). This strategy is applied to an adjustable speed drives that is composed from an Active Front End (AFE). A state of art of the different solutions of the reduction of the conducted emissions has been achieved. This study shows that the control strategy (PWM) is a useful technique for reducing common mode interferences. A new PWM strategy allowing the synchronization of all the switching cell of the AFE and inverter has been developed and will be noted "full synchronization". In order to highlight the impact of this method on the conducted emissions, a study of phenomena related to the power transistors' switching is carried out. A simplified model of the switching allowed the evaluation of the performances of full synchronization method on the common mode voltage. This method was then validated experimentally on an ASD prototype using the developed control strategy algorithm. The obtained results show the advantages of the proposed full synchronization method, mainly in the reduction of the dimensions of the EMI filters for compliance with EMC standards
Elenius, Daniel. "Accounting for Individual Speaker Properties in Automatic Speech Recognition." Licentiate thesis, KTH, Speech Communication and Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12258.
Повний текст джерелаIn this work, speaker characteristic modeling has been applied in the fields of automatic speech recognition (ASR) and automatic speaker verification (ASV). In ASR, a key problem is that acoustic mismatch between training and test conditions degrade classification per- formance. In this work, a child exemplifies a speaker not represented in training data and methods to reduce the spectral mismatch are devised and evaluated. To reduce the acoustic mismatch, predictive modeling based on spectral speech transformation is applied. Follow- ing this approach, a model suitable for a target speaker, not well represented in the training data, is estimated and synthesized by applying vocal tract predictive modeling (VTPM). In this thesis, the traditional static modeling on the utterance level is extended to dynamic modeling. This is accomplished by operating also on sub-utterance units, such as phonemes, phone-realizations, sub-phone realizations and sound frames.
Initial experiments shows that adaptation of an acoustic model trained on adult speech significantly reduced the word error rate of ASR for children, but not to the level of a model trained on children’s speech. Multi-speaker-group training provided an acoustic model that performed recognition for both adults and children within the same model at almost the same accuracy as speaker-group dedicated models, with no added model complexity. In the analysis of the cause of errors, body height of the child was shown to be correlated to word error rate.
A further result is that the computationally demanding iterative recognition process in standard VTLN can be replaced by synthetically extending the vocal tract length distribution in the training data. A multi-warp model is trained on the extended data and recognition is performed in a single pass. The accuracy is similar to that of the standard technique.
A concluding experiment in ASR shows that the word error rate can be reduced by ex- tending a static vocal tract length compensation parameter into a temporal parameter track. A key component to reach this improvement was provided by a novel joint two-level opti- mization process. In the process, the track was determined as a composition of a static and a dynamic component, which were simultaneously optimized on the utterance and sub- utterance level respectively. This had the principal advantage of limiting the modulation am- plitude of the track to what is realistic for an individual speaker. The recognition error rate was reduced by 10% relative compared with that of a standard utterance-specific estimation technique.
The techniques devised and evaluated can also be applied to other speaker characteristic properties, which exhibit a dynamic nature.
An excursion into ASV led to the proposal of a statistical speaker population model. The model represents an alternative approach for determining the reject/accept threshold in an ASV system instead of the commonly used direct estimation on a set of client and impos- tor utterances. This is especially valuable in applications where a low false reject or false ac- cept rate is required. In these cases, the number of errors is often too few to estimate a reli- able threshold using the direct method. The results are encouraging but need to be verified on a larger database.
Pf-Star
KOBRA
Stokes-Rees, Ian James. "A Study of the Automatic Speech Recognition Process and Speaker Adaptation." Thesis, University of Waterloo, 2000. http://hdl.handle.net/10012/840.
Повний текст джерелаMolina, Martín Julio César. "Evaluación anatómica, funcional e inmunohistoquímica de pacientes con membranas epirretinales idiopáticas." Doctoral thesis, Universidad de Alicante, 2018. http://hdl.handle.net/10045/97755.
Повний текст джерелаLe, Besnerais Jean. "Réduction du bruit d'origine magnétique dans une machine asynchrone alimentée par MLI - règles de conception silencieuse et optimisation multi-objectif." Phd thesis, Ecole Centrale de Lille, 2008. http://tel.archives-ouvertes.fr/tel-00348730.
Повний текст джерелаDans une première partie, une vue générale des travaux de modélisation vibro-acoustique des machines asynchrones et de leurs hypothèses est donnée. L'ensemble des règles de conception silencieuse existantes est présenté, et les effets des variables de conception du moteur et de l'onduleur sur le bruit sont rapportés, ainsi que les travaux portant sur la conception optimale des machines asynchrones.
Ensuite, un modèle analytique complet du comportement vibro-acoustique et électrique du moteur est établi (DIVA). Des résultats de simulation sont présentés et validés par éléments finis, éléments frontières ou par test. La saturation, la MLI et la charge sont pris en compte dans le modèle.
Enfin, une description analytique exhaustive des ondes principales de force magnétique est faite. Leurs caractéristiques (fréquence, sens de propagation, nombre de nœuds, amplitude) sont validées à l'aide de spectrogrammes et de déformées opérationnelles. A partir de cette analyse, de nouvelles règles de conception silencieuse sont établies.
Le modèle est ensuite couplé à un algorithme d'optimisation afin de concevoir un nouveau moteur à faible bruit magnétique respectant les caractéristiques de traction spécifiées, et deux prototypes de rotor sont conçus.
Des essais sont réalisés sur un premier prototype, et un gain de 15 dB est observé en charge et en régime MLI. Le nouveau moteur atteint le couple spécifié sans accroître les pertes ni le courant de phase.
Hobraiche, Julien. "Contribution à l'optimisation d'une stratégie MLI triphasée vis-à-vis de l'ensemble onduleur/machine/bus continu : application à l'alterno-démarreur." Compiègne, 2005. http://www.theses.fr/2005COMP1598.
Повний текст джерелаPresented works are about the optimization of the PWM strategy used for the control of a three phased o levels inverter. The first aim was to reduce the losses inside the power converter in order to increase the reliability of the existent inverter working PWM mode and also to reduce the size of the future realizations The second aim was to determine if the PWM strategy can control the DC-link voltage ripple so as to reduce the size of the DC-link capacitor. Results obtained shows that it is possible to respond simultaneously at the o purposes. Switching losses in the power converter can be reduced by 25% to 50% and the RMS current in the OC-link capacitor can be decreased by nearly 40%. A simple and fast algorithm was implemented on a powertrain test bench
Zhang, Yuan. "Comportement dynamique d'une chaine de traction asynchrone avec l'onduleur de tension MLI : analyse de la stabilité : commande scalaire et vectorielle." Toulouse, INPT, 1988. http://www.theses.fr/1988INPT067H.
Повний текст джерелаMadani, Nadia. "Commande à structure variable d'une machine asynchrone double étoile alimentée par deux onduleurs MLI : modélisation dynamique, alimentation et validation expérimentale." Nantes, 2004. http://www.theses.fr/2004NANT2105.
Повний текст джерелаSupplying polyphase machine or double star machine by PWM voltage inverters causes currents peaks at each commutation. From a control point of view, these drives are multi-variable and strongly coupled. This thesis deals with the Double Star Asynchronous Machine (DSAM) supplied by two PWM inverters. It's divided in three parts : the first part concerns the elaboration of DSAM's dynamic modelling methodology. After presenting different modelling approaches, a vectorial formalism known concept, for polyphase machines modelling , is generalized to multi stars machines modelling. The second part of this work concerns the drives's behaviour analysis. The alimentation structures's influence (two or three levels inverters ) and their PWM command on the drive's temporal behaviour are investigated. The third part deals with the drive's variable structure control based on sliding mode technics. The objective of the control laws is to control machine flux and torque, and at the same time to minimize the amplitude of the currents circulating between the two stars. A methodology for synthesising a sliding mode control is elaborated for a three phase machine then extended to DSAM. Finally, in order to satisfy the defined objective, we propose a variable structure control algorithm based on the combination of six phase SVPWM control and sliding mode control. This study presents simulation and implementation results, obtained thanks to a benchmark built in the laboratory
Bock, Florian. "Active learning of interatomic potentials to investigate thermodynamic and elastic properties of Ti0.5Al0.5N at elevated temperature." Thesis, Linköpings universitet, Teoretisk Fysik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176587.
Повний текст джерелаLi, Yong-Dong. "Étude comparative des lois de commande des machines asynchrones alimentées par onduleur de tension MLI : réalisation d'une commande numérique de positionnement." Toulouse, INPT, 1987. http://www.theses.fr/1987INPT106H.
Повний текст джерелаTounsi, Mohamed. "Cyclage actif en mode MLI des modules de puissance IGBT application des SVM pour le diagnostic des défauts de vieillissement thermique." Caen, 2011. http://www.theses.fr/2011CAEN2082.
Повний текст джерелаThe work concerns the implementation of an SVM classifier (Support Vector Machine) for an automatic diagnosis of power IGBT module thermal ageing defects, based on thermoelectric measurements. This has required the development of an active cycling test bench for the characterization of the thermal tiredness of IGBT modules, the analysis of the degradations generated in their assembly, and the classification of their operating mode : in " healthy " mode and " degraded " mode. The strategy adopted for the thermal cycling, aims to reproduce the constraints imposed on the components during their real operation. We followed the module static and dynamic parameters in order to detect possible drifts, and thermoelectric parameters used as criteria of thermo-mechanical degradations in their assembly. The thermal stress caused mainly, earlier switching-on and switching-off modes and appearance of a tile-current. A failure analysis has revealed, in the component assembly, bond-wire lift-off, solder layer degradation, and surface dislocation of the gate and emitter metallizations. The implemented SVM classifier, allows to distinguish between an IGBT degraded operating mode and a healthy operating mode, for a preventive maintenance in electric installations where the continuity of service and safety are very important
Kilani, Khaled. "Faisabilité des courants porteurs en ligne sur un câble triphasé entre un onduleur MLI et un moteur pour des applications avioniques." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10011/document.
Повний текст джерелаThe objective of "More electric" or "all electric" aircrafts is to replace the hydraulic and pneumatic power by electric sources. However, these changes lead to the increase in the power consumption and the need of communication between systems. This comes at the cost of additional cables and connections with challenges in weight considerations, reliability and maintenance. A possible solution to overcome this problem is the use of powerline communication (PLC) by employing the power cables to support the transmission of information. The main objective of our work is the study of the feasibility of a transmission over a powerline cable connecting a three-phase power converter and motor in an avionic environment. First, the characteristics of the transfer function or insertion gains, measured on a test bench including a motor and an inverter are presented. We initiate our study by considering the case of single input single output (SISO) communication using two wires as physical media. The injection and the reception have been performed by two types of coupling, capacitive or inductive. Then, the study was extended to the case of multiple-input and multiple-output (MIMO) transmission in which signals are transmitted simultaneously on two pairs of wires. In this case, the transfer matrix of the channel has been characterized. The measurements were carried out in two environments: a 3 wires network placed inside a building and a three-phase cable connecting the power inverter and motor.Due to the impact of many pulses produced by Pulse Width Modulation (PWM) inverters, a special effort has been made on the experimental characterization of these pluses and their statistical parameters. This leads to develop a noise model used as an input to a software simulator. Clipping methods and a noise suppression method were studied in order to reduce the effect of impulsive noise. The simulation showed that the transmission using a noise suppression technique preceded by a clip of the received signals is the most efficient, providing a gain of 6 dB compared to a transmission without treatment. Then we were interested in the performance of the HomePlug AV standard in both modes, robust (ROBO) and broadband (AV) in the presence of impulsive noise.Finally, performance in terms of bit error rate (BER) of the MIMO transmission on indoor networks and on a three phase power cable was presented for different types of space-time bloc coding (STBC) and space frequency bloc coding (SFBC). It has been shown that, for a rate of 5 Mbit/s, transmission over the three phase cable in the ROBO mode associated with the SFBC method and MIMO-QPSK modulation, offered a diversity gain of 5 dB without prior channel knowledge at the transmitter
Bai, Yang. "Quality constrained scheduling of mining operations." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1176496345.
Повний текст джерелаMaïga, Cheick Oumar. "Etude du vieillissement de différentes structures de Transistors Bipolaires à Grille Isolée (IGBT) : application à la sûreté de fonctionnement d’un onduleur MLI." Caen, 2006. http://www.theses.fr/2006CAEN2014.
Повний текст джерелаThe work presented is concerned with the ageing study of various technologies of Insulated Gate Bipolar Transistors (IGBT). We have analysed the effects of a High Temperature Gate Bias and a High Temperature Reverse Bias stresses on the two major technologies of IGBT which are the planar gate technology (Punch-Trough IGBT and Non-Punch-Through IGBT) and the trench gate technology (Trench-IGBT). The study highlighted a more or less significant evolution of different electric parameters which could be used as ageing indicators. The consequences of the evolution of the switching times on a PWM inverter operation were analysed. It was shown that the ageing of the IGBTs would lead to a modification of the harmonic spectrum of the output voltage and the output current in the case of planar technology and to a short circuit in of the DC link in the case of the trench technology
Merabtene, Mourad. "Modélisation dynamique et commande d'une machine synchrone double étoile alimentée par des onduleurs MLI fonctionnement en mode normal et en mode dégradé." Nantes, 2005. http://www.theses.fr/2005NANT2032.
Повний текст джерелаThis thesis presents the dynamic modelling in view of simulation and control of the double star salient poles synchronous machines supplied by PWM inverters. Based on the established modelling approaches, the initial machine's model, characterised by a strong coupling, is transformed on several magnetically decoupled equivalents models. These modelling approaches are extended to the functioning under fault condition of the electrical drive. Specific simulation software is developed in view to simulate and to analyse the dynamic behaviour of the inverters-machine set under balanced and unbalanced functioning. In order to minimise the torque ripples and the losses under fault condition, a control strategies are elaborated. A generalised control algorithm is proposed for the torque control in the two operating modes. The various studies were validated on an experimental prototype
Li, Yong-Dong. "Etude comparative des lois de commande de machines asynchrones alimentées par un onduleur de tension MLI réalisation d'une commande numérique de positionnement /." Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37607384r.
Повний текст джерелаFerràs, Font Marc. "Utilisation des coefficients de régression linéaire par maximum de vraisemblance comme paramètres pour la reconnaissance automatique du locuteur." Phd thesis, Université Paris Sud - Paris XI, 2009. http://tel.archives-ouvertes.fr/tel-00616673.
Повний текст джерелаPelissou, Catherine. "Controle du couple d'une machine asynchrone pour la traction ferroviaire à moyenne et grande vitesse : transitions des modes de commandes et de MLI." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0101.
Повний текст джерелаPierre, François. "Rôle et fonction des gènes YPO2857 et YPO2371 dans la peste." Thesis, Lille 2, 2012. http://www.theses.fr/2012LIL2S024.
Повний текст джерелаYersinia pestis (the agent of flea-borne plague) harbors genes encoding putative homologues of the respectively periplasmic and membrane-bound vertebrate lysozyme inhibitors Ivy and MliC. Both inhibitors are thought to control autolytic activity rather than protect bacteria against lysozyme molecules encountered during host infection. Here, we show that MliC was not required for lysozyme resistance and the development of plague. In contrast, Y. pestis required Ivy for lysozyme resistance when grown at 37°C but not at 21°C (the optimal temperature for flea-borne transmission). Deletion of ivy did not affect Y. pestis’ ability to grow in human serum or resist human macrophages but it did decrease resistance to human polymorphonuclear neutrophils. Y. pestis lacking Ivy had attenuated virulence in rodent models of bubonic and pneumonic plague but was fully virulent in lysozyme M-deficient or GR1+ cell-depleted mice. Our results demonstrate the importance of vertebrate lysozyme inhibitors in bacterial pathogenesis and support a scenario in which Y. pestis deposited in the dermis produces Ivy to inhibit the lysozyme released by polymorphonuclear neutrophils. Our results also suggest that once Y. pestis is in the flea gut, it resists lysozyme via an Ivy-independent mechanism. Lastly, Yersinia pseudotuberculosis (Y. pestis’ recent ancestor, which causes self-limited bowel disease in humans) did not require Ivy for lysozyme resistance or virulence. Thus, our study also shows that a gene which is not necessary for the virulence of an ancestral bacterium may become essential in the emergence of a new pathogen