Teses / dissertações sobre o tema "Analyse de consommation énergétique"
Crie uma referência precisa em APA, MLA, Chicago, Harvard, e outros estilos
Veja os 50 melhores trabalhos (teses / dissertações) para estudos sobre o assunto "Analyse de consommation énergétique".
Ao lado de cada fonte na lista de referências, há um botão "Adicionar à bibliografia". Clique e geraremos automaticamente a citação bibliográfica do trabalho escolhido no estilo de citação de que você precisa: APA, MLA, Harvard, Chicago, Vancouver, etc.
Você também pode baixar o texto completo da publicação científica em formato .pdf e ler o resumo do trabalho online se estiver presente nos metadados.
Veja as teses / dissertações das mais diversas áreas científicas e compile uma bibliografia correta.
Césari-Hékimian, Vartouhie. "Analyse des prix de l'énergie et incidence de la fiscalité". Paris 1, 1990. http://www.theses.fr/1990PA010014.
Texto completo da fontePreliminary chapter: quantitative elements of consumption and production of energy by energy type, in the world and in France since 1970. Part one: analysis of energy prices in France from 1970 to 1988. Introduction : economic theory and energy prices. Chapter one: pricing as a function of the specific characteristics of each energy preliminary chapter : quantitative elements of consumption and production of energy by energy type, in the world and in France since 1970. Part one : analysis of energy prices in France from 1970 t 1988. Introduction : economic theory and energy prices. Chapter one : princing as a function of the specific characteristics of each energy type. Second chapter: study of the selling price of each type of energy and its evolution comparaison of the evolution of all energy prices. Part two: study of energy taxes in france from 1970 to 1988. Introduction : some economic principles concerning financial and budgetary matters type. Second chapter : study of the selling price of each type of energy and its evolution comparaison of the evolution of all energy prices. Part two : study of energy taxes in France from 1970 to 1988. Introduction : some ecnomic principles concerning financial and budgetary matters and taxation. First chapter: different types of energy, whether specific to energy or not. Second chapter: analysis of taxes specifically levied on energy (taxes on production and taxes on consumption) : their amount per unit consumed and their level with respect to the price of each type of energy and, their evolution - comparison of the and taxation. First chapter : different types of taxes on energy, whether specific to energy or not. Second chapter : analysis of taxes specifically levied on energy (taxes on production and taxes on consumption) : their amount per unit consumed and their level with respect to the price of each type of energy and, their evolution - comparison of the evolution of taxation on the different energy types. Evolution of taxation on the different energy types
Fall, Ameth. "Analyse des performances d'un véhicule utilitaire routier et évaluation de sa conduite en vue d'une gestion optimale, énergétique et mécanique". Toulouse, ENSAE, 1994. http://www.theses.fr/1994ESAE0026.
Texto completo da fonteKammoun, Nadia. "Analyse de l'intensité énergétique dans les industries manufacturières de quatres provinces canadiennes de 1976 à 2006". Master's thesis, Université Laval, 2011. http://hdl.handle.net/20.500.11794/22606.
Texto completo da fonteBakaloglou, Salomé. "Les obstacles à la baisse des consommations énergétiques dans le secteur résidentiel : une analyse empirique du cas français". Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTD004/document.
Texto completo da fonteReducing the energy consumption of the residential sector is a major stake in the context of the energy transition and the fight against climate change. However, despite the implementation of several dedicated public policies, the energy consumption of the sector has barely decreased in France. Through four empirical articles, this thesis aims to identify some of the barriers to the decrease of the French residential energy consumption with a focus on the role of individual determinants. In the first chapter, we wish to contribute to the literature on the barriers to energy efficiency investment (Sutherland, 1991) and the “energy efficiency gap” (Jaffe and Stavins, 1994). We use the methodology of the discrete choice experiment to assess the role of perceived risk and uncertainty on retrofit quality and energy price as barrier to the energy renovation decision. In the second chapter, we provide an empirical contribution on the role of individual preferences for comfort, other individual determinants and energy performance of dwellings in explaining energy consumption. In the third chapter, we study the energy performance gap (gap between theoretical and real energy consumption at dwelling level) and its drivers by using the quantile regression. Finally, in the fourth chapter, we test the assumption of the existence of a rebound effect for the heating energy consumption in France
Seghouani, Lotfi. "Analyse des interactions énergétiques entre un aréna et son système de réfrigération". Thèse, Université de Sherbrooke, 2009. http://savoirs.usherbrooke.ca/handle/11143/1917.
Texto completo da fonteMontenon, Alaric. "Analyse, mutualisation et optimisation par la commande de la consommation énergétique des héliostats autonomes des centrales à concentration solaire". Phd thesis, Toulouse, INPT, 2013. http://oatao.univ-toulouse.fr/9709/1/montenon_partie_1_sur_2.pdf.
Texto completo da fonteAkerma, Mahdjouba. "Impact énergétique de l’effacement dans un entrepôt frigorifique : analyse des approches systémiques : boîte noire / boîte blanche". Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS187.
Texto completo da fonteRefrigerated warehouses and cold rooms, mainly used for food conservation, constitute available storage cells; they can be considered as a network of "thermal batteries" ready to be used and one of the best existing solutions to store and delay electricity consumption. However, the risk related to temperature fluctuations of products due to periods of demand response - DR* and the risk of energy overconsumption limit the use of this strategy by industrials in food refrigeration. The present PhD thesis aims to characterize the electrical DR of warehouses and cold rooms by examining the thermal behavior of those systems, in terms of temperature fluctuation and electrical consumption. An experimental set-up was developed to study several DR scenarios (duration, frequency and operating conditions) and to propose new indicators to characterize the impact of DR periods on the thermal and energy behavior of refrigeration systems. This study has highlighted the importance of the presence of load to limit the temperature rise and thus to reduce the impact on stored products. The potential for DR application in the case of a cold store and a cold room was assessed, based on the development of two modeling approaches: “black box” (Machine Learning by artificial neural networks using Deep Learning models) and “white box” (physics). A possibility of interaction between these two approaches has been proposed, based on the use of black box models for prediction and the use of the white box model to generate input and output data
Doya, Maxime. "Analyse de l'impact des propriétés radiatives de façades pour la performance énergétique de bâtiments d'un environnement urbain dense". Phd thesis, Université de La Rochelle, 2010. http://tel.archives-ouvertes.fr/tel-00537691.
Texto completo da fonteCalmettes, Guillaume. "Analyse intégrative de l'adaptation de l'énergétique cardiaque à l'hypoxie chronique". Thesis, Bordeaux 2, 2010. http://www.theses.fr/2010BOR21711/document.
Texto completo da fonteAn important issue in the comprehension of the link between molecular events developed in pathologies such as chronic hypoxia adaptation, is the development of new experimental strategies aimed at the study of the integrated organ physiology. Our Modular Control Analysis (MoCA), gives quantitative information on the internal control and regulation of integrated heart energetics on the basis of a supply-demand system and is therefore of particular interest to better understand the overall effect as well as the relative importance of the various modi?cations developed during pathologies. In this thesis, MoCA was applied on isolated hearts of control and chronic hypoxic mice perfused with high or low oxygen in the medium. Despite a severe mitochondrial alteration after chronic hypoxia exposure, a surprizing higher response of energy supply (elasticity) to energetic intermediates changes (PCr, ATP, Pi) was detected in chronic hypoxic hearts. Moreover, chronic hypoxic hearts energetics was unchanged by oxygen reduction while a strong concomitant decrease in heart contractile activity and in PCr concentration, was measured in control hearts. As suggested by these results, this increase in energy-supply elasticity could be considered as an adaptive mechanism developed after chronic hypoxia counteracting hypoxia-induced altered cardiac energetics
Spitz, Clara. "Analyse de la fiabilité des outils de simulation et des incertitudes de métrologie appliquée à l'efficacité énergétique des bâtiments". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00768506.
Texto completo da fonteChakir, Raja. "Analyse microéconométrique des substitutions inter-énergétiques : application au secteur bois et papier français". Toulouse 1, 2003. http://www.theses.fr/2003TOU10073.
Texto completo da fonteThe purpose of this thesis is to analyse interfuel substitution possibilities in the pulp and paper sector in France. The proposed models are useful to evaluate the outcome of price variations or an environmental policy. First, we provide an empirical application of the virtual price approach to the problem of cormer solutions in the case of panel data. The econometric model is an endogenous switching regime model which requires the evaluation of multivariate probability integrals. We estimate the random effect model by maximum likelihood using a panel of French plants from the paper and pulp industry. Next, we propose a Simulated Maximum Likelihood technique for estimation of the simultaneous equation demand system in the case of five forms of energy. Finally, our estimates are used to predict the outcome of an environmental policy aimed at reducing CO2 emissions in the paper and pulp industry. Results show that there are real interfuel substitution possibilities in this sector
Sanoussi, Hamadou. "Énergie et économie : analyse de la relation consommation d'électricité et production de richesse dans une perspective d'intelligence économique". Thesis, Lyon 3, 2014. http://www.theses.fr/2014LYO30004.
Texto completo da fonteThe subject of this thesis consists of an analysis of the relationship between electricity consumption and Gross Domestic Product from the perspective of Competitive Intelligence. More specifically, it analyzes the evolution of the electrical intensity of economic activity from 2003 to 2012 in the developed countries of the G7, and then estimates their electricity needs from 2013 to 2022. Part one attempt to explore theoretical and practical aspects of Competitive Intelligence to understand and apply them, while part two is devoted to the empirical analysis itself.Concerning the latter, our results are as follows:First, the electrical intensity curves of two countries—Canada and the United States—dominate those of other developed countries; thus, the economies of these two North American countries are more energy-hungry than those of Japan and the countries of the European Union. The overall temporal evolution of electricity consumption per GDP unit over a ten-year period (2003-1012) has gone down in five countries: Canada (-12%), the United Kingdom (-5.3%), the United States (-5%), France (-4%), and Germany (-3%). On the other hand, this evolution has gone the other direction in Japan (+5%) and Italy (+6%). The effect of “structure” is negative across all analyzed data, suggesting general “tertiarisation”. However, the effect of “electricity efficiency” is mixed: it is negative in the United States and Canada, but positive for the rest of group.Second, estimations indicate an overall growth in electricity demand across all G7 countries from 2013 to 2022. Additionally, electrical elasticity coefficients/GDP units are down in all countries except Italy. This tells us that the average annual demand for electricity in these countries should increase at a slower rate than their respective GDPs.Lastly, the primary research perspectives that appear at the beginning of this thesis concern the transposition of our model of analysis (energetic intelligence) onto other forms of energy such as oil, natural gas, coal, and renewable energy sources. In the end, this model could be useful to economic and political authorities (governments, private companies, NGOs, IGOs, etc.) as an instrument of economic, energy, and environmental policy
Samoud, Wiem. "Analyse de performance d'un commutateur de paquets hybride opto-électronique". Electronic Thesis or Diss., Paris, ENST, 2016. http://www.theses.fr/2016ENST0058.
Texto completo da fonteMost transmission systems are based on optical fibers, carrying the traffic at a relatively low energy per bit. However, due to the lack of mature optical buffers, packet switching is still performed electrically. The required Optical-Electrical-Optical (O-E-O) conversions make the switching one of the areas with the fastest-growing energy consumption. A major challenge that must be met in designing future optical networks is curbing their energy consumption. Therefore, within this thesis, we investigate a hybrid optoelectronic switch which consists of an optical switching matrix supplemented with a shared electronic buffer. Performance analysis taking into account different classes of service, packet classifications and switch connectivity methods (WDM and/or SDM channels), shows that, thanks to the established switching strategies, the hybrid switch satisfies the requirements of all the different classes of service in terms of Packet Loss Rate, sustainable system load and latency. Moreover, it significantly reduces the O-E-O conversions compared to commercial off-the-shelf electrical switches, since they occur only for buffered packets. We defend that the hybrid opto-electronic packet switch meets the requirements on quality of service and could be a promising solution to reduce the energy consumption of optical networks
Chabriat, Jean-Pierre. "Analyse énergétique de procédés de fabrication en sucrerie de cannes : étude théorique et expérimentale". Lyon 1, 1993. http://www.theses.fr/1993LYO10014.
Texto completo da fonteThe purpose of this thesis is the creation of tools in order to analyse energy balances in manufacturing within a sugar mill. This work should also implement the basis of another tool enabling us to produce a diagnosis on the working of sugar mill. This research relies on diverse subjects such as energetics, thermochemistry, metrology, numerical analysis and data-processing. Following our introduction to the industrial process of milling sugar, we have then realized bibliographical studies about basic tools of energetic analysis of sugar manufacturing: energetic balances theory, the thermophysic of the constituants and the review of thermical balances in a sugar mill. An energetic analysis enabled us to reveal the essential action of the evaporation unit in the distribution of steam energy in the core of the sugar mill. We have built up both a physical and mathematical model of this process based on energetic balances equations of open thermodynamics systems. At the same rime, a portable device has been elaborated in order to realize measurements of thermodynamic quantities experimentally accessible. Thanks to the analyses led as well as the measurements gathered at the sugar mill of Beaufonds, several tools have been created. A computer programm relying on the physical model elaborated by ourselves has been run in three energetic models of calculation i. E. : data processing, global model and combined model. We validate our study by analysing comparatively and accurately the different results
Besseau, Romain. "Analyse de cycle de vie de scénarios énergétiques intégrant la contrainte d’adéquation temporelle production-consommation". Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM068.
Texto completo da fonteThis research work deals with the environmental impact assessment of energy. The current energy model, which supports the global economy, leads to major environmental impacts by contributing to climate change and resource depletion,and by degrading biodiversity and human health. The environmental impacts of energy systems are assessed, not only considering the energy generation phase, but the whole life-cycle of energy systems : from raw material extraction to end of life. As renewable energies are weather dependent, storage systems may become required to ensure the temporal balance between the production of energy and consumption when renewable energies reach high penetration rates. As a first step, parameterized life-cycle inventory models have been developed for the main energy technologies to produce orstore energy. Those models enable to account for the technological, spatial and temporal variability that can be important. As a second step, an approach based on times-series to model energy production as well as energy consumption has been developed. It allows assessing the energy storage needs induced by the weather dependency of the production and consumption.The global dynamic and parametric method to assess the life cycle environmental impact here developed has been appliedto self-consumption scenarios and then, to the insular territory of La Réunion. Those applications reveal that, even when accounting for the storage need induced by the weather dependency of the production, renewable energies present an environmental footprint significantly lower than the fossil counterparts they aim to substitute
Samoud, Wiem. "Analyse de performance d'un commutateur de paquets hybride opto-électronique". Thesis, Paris, ENST, 2016. http://www.theses.fr/2016ENST0058/document.
Texto completo da fonteMost transmission systems are based on optical fibers, carrying the traffic at a relatively low energy per bit. However, due to the lack of mature optical buffers, packet switching is still performed electrically. The required Optical-Electrical-Optical (O-E-O) conversions make the switching one of the areas with the fastest-growing energy consumption. A major challenge that must be met in designing future optical networks is curbing their energy consumption. Therefore, within this thesis, we investigate a hybrid optoelectronic switch which consists of an optical switching matrix supplemented with a shared electronic buffer. Performance analysis taking into account different classes of service, packet classifications and switch connectivity methods (WDM and/or SDM channels), shows that, thanks to the established switching strategies, the hybrid switch satisfies the requirements of all the different classes of service in terms of Packet Loss Rate, sustainable system load and latency. Moreover, it significantly reduces the O-E-O conversions compared to commercial off-the-shelf electrical switches, since they occur only for buffered packets. We defend that the hybrid opto-electronic packet switch meets the requirements on quality of service and could be a promising solution to reduce the energy consumption of optical networks
Maudet, Sébastien. "Analyse et modélisation énergétiques des réseaux de communications pour l’IoT". Electronic Thesis or Diss., Nantes Université, 2024. http://www.theses.fr/2024NANU4002.
Texto completo da fonteIoT is an innovative concept that enables objects to exchange data over communications networks. These objects are typically deployed with limited energy resources, and IoT communication protocols must take these constraints into account. In this thesis, we analyzed and modeled the energy consumption of two of the most prominent IoT communication protocols. First, we focused on Wi-Fi HaLow. After a descriptive presentation of this protocol and its mechanisms, performance was studied and characterized. Measurement campaigns showed that it performs well in terms of range, throughput and latency. Analysis of the protocol and measurements of the energy consumed on hardware have enabled us to establish an initial consumption model. This takes into account the exchanges required to establish a communication. The model was then refined to obtain a model based on an absorbing Markov chain that takes into account the environment and network density. This study validates the use of this technology in various IoT domains.We then turned our attention to the LoRaWAN protocol. Measurements of the energy consumed on hardware enabled us to propose a new energy consumption model that takes into account the node’s environment (retransmissions, errors and collisions). Finally, a comparison of the metrics and energy consumption of these two protocols was carried out, in order to open a discussion on the prospects for use cases
Leboullenger, Déborah. "Essais sur la transition énergétique : enjeux, valorisation, financement et risques". Thesis, Paris 10, 2017. http://www.theses.fr/2017PA100065/document.
Texto completo da fonteThis thesis deals with the main challenges that we need to address to foster the private financing of a low-carbon energy transition. A massive amount of investment in low carbon assets is needed and most of the effort must come from final energy consumers such as households. Their ability as well as the ability of the financial intermediation institutions (that is banks in Europe) to valorise low-carbon investments and risk profile is the key for a successful low-carbon energy transition in France and in every industrialized country. These researches focus more particularly on the housing sector which represents 44% of the final energy consumption and 21% of the total greenhouses gases emissions in France. The first chapter of this thesis takes the viewpoint that only a disaggregated approach can actually permit macroeconomic and nationwide objectives to reduce final energy consumption match microeconomic arbitrages regarding energy spending in the private residential housing sector. Using segmentation and decision tree growing econometric techniques, the chapter proposes a typology of energy spending and a segmentation analysis and of the energy transition “market” in the housing sector. The second chapter uses frontier functions estimation technique on a local French private housing market to determine if selling prices contain a “Green Property Value”. An empirical analysis is then conducted to determine if this value can offset the upfront cost of energy retrofit. The last chapter takes the prism of the financial institutions. It attempts a first evaluation of the impact and exposition to climate related risks, those are physical, transition, liability and systemic risks, on the banking system and its prudential regulation framework
Madelenat, Jill. "La consommation énergétique du secteur tertiaire marchand : le cas de la France avec données d’enquête à plan de sondage complexe". Thesis, Paris 10, 2016. http://www.theses.fr/2016PA100183/document.
Texto completo da fonteThis thesis deals with energy consumption in the French tertiary buildings. We adopt an empirical approach based on a French national survey, the Tertiary Buildings Energy Consumption Survey (l’Enquête sur les Consommations d’Énergie dans le Tertiaire (ECET)). From a literature review, we present the econometric analyses of the drivers of energy consumption in buildings (residential and tertiary). This review highlights the coexistence of two estimation methods. We discuss these methods, and then we detail consensus and debates on the effects of every driver that has already been analyzed in the literature. Because the data we use are complex sample survey data, we describe the statistical tools that must be used to analyze this type of data, and next present the still controversial issue of econometric modeling based on survey data. Then we use our database to produce a first statistical description of energy consumption in tertiary buildings. This description is based on a nomenclature that we establish to obtain information at the subsector level. Finally, we use all the methods and approaches identified previously to study the drivers of the tertiary buildings’ energy demand by implementing an econometric analysis on the ECET data. This lead to a double analysis of our results, both as elements of knowledge on the impact of each driver on energy consumption and as materials that help to compare the different methods to use
Novel, Aymeric. "Développement d’une méthode de méta modélisation des consommations énergétiques des bâtiments en fonction des facteurs d’usages et d’exploitation pour la garantie de résultat énergétique". Thesis, La Rochelle, 2019. http://www.theses.fr/2019LAROS001/document.
Texto completo da fonteSince building envelope and MEP systems characteristics regularly improve, the weight of non-regulatory energy end-uses increases. These energy end-uses are typically associated with tenants or owners’ activities. In addition, high performance buildings show new issues related to HVAC systems operations. Therefore, it is important to evaluate and improve non-regulatory energy end-uses energy as well as HVAC systems operations efficiencies. We have developed polynomial energy models that can predict energy consumption as a function of building’s activities characteristics and HVAC systems operations factors. We used EnergyPlus software in order to build reliable energy models along with the D-optimum design of experiments method (DOE). Then, we used measurement and verification (M&V) data, associated with probability functions, to determine the associated uncertainty of the calculated energy consumption. Finally, we combine the latter with the polynomial modeling error to calculate the energy consumption global uncertainty, with the goal to identify strategies to reduce it
Bouziane, Rabab. "Software-level analysis and optimization to mitigate the cost of write operations on non-volatile memories". Thesis, Rennes 1, 2018. http://www.theses.fr/2018REN1S073/document.
Texto completo da fonteTraditional memories such as SRAM, DRAM and Flash have faced during the last years, critical challenges related to what modern computing systems required: high performance, high storage density and low power. As the number of CMOS transistors is increasing, the leakage power consumption becomes a critical issue for energy-efficient systems. SRAM and DRAM consume too much energy and have low density and Flash memories have a limited write endurance. Therefore, these technologies can no longer ensure the needs in both embedded and high-performance computing domains. The future memory systems must respect the energy and performance requirements. Since Non Volatile Memories (NVMs) appeared, many studies have shown prominent features where such technologies can be a potential replacement of the conventional memories used on-chip and off-chip. NVMs have important qualities in storage density, scalability, leakage power, access performance and write endurance. Nevertheless, there are still some critical drawbacks of these new technologies. The main drawback is the cost of write operations in terms of latency and energy consumption. We propose a compiler-level optimization that reduces the number of write operations by elimination the execution of redundant stores, called silent stores. A store is silent if it’s writing in a memory address the same value that is already stored at this address. The LLVM-based optimization eliminates the identified silent stores in a program by not executing them. Furthermore, the cost of a write operation is highly dependent on the used NVM and its non-volatility called retention time; when the retention time is high then the latency and the energetic cost of a write operation are considerably high and vice versa. Based on that, we propose an approach applicable in a multi- bank NVM where each bank is designed with a specific retention time. We analysis a program and we compute the worst-case lifetime of a store instruction to allocate data to the most appropriate NVM bank
Botton, Florent. "Mesure et modélisation bioénergétique des exercices intermittents : application au tennis". Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00863609.
Texto completo da fonteVorger, Éric. "Étude de l'influence du comportement des habitants sur la performance énergétique du bâtiment". Thesis, Paris, ENMP, 2014. http://www.theses.fr/2014ENMP0066/document.
Texto completo da fonteHuman behaviour is modelled in a simplistic manner in building energy simulation programs. However, it has a considerable impact and is identified as a major explanatory factor of the discrepancy between simulation results and in situ measurements. Occupants influence buildings energy consumption through their presence and activities, the opening/closing of windows, the actions on blinds, the use of artificial lighting and electrical appliances, the choices of temperature setpoints, and the water consumptions. The thesis proposes a model of occupants' behaviour including all these aspects, according to a stochastic approach, for residential and office buildings. Models' development is based on numerous data from measurements campaigns, sociological surveys and from the scientific literature. The proposed model for occupants' behaviour is coupled to the simulation tool Pléiades+COMFIE. By propagating the uncertainties of factors from the occupants' behaviour model and the thermal model (envelope, climate, systems), the simulation results confidence interval can be estimated, opening the way to an energy performance guarantee process
Nidhoimi, El-Assad. "Description et analyse du fonctionnement énergétique des espaces bâtis. Mises en œuvre systémique du bilan carbone associé. Application à l'Éco Ferme de Vincendo et au territoire de Mayotte". Thesis, La Réunion, 2018. http://www.theses.fr/2018LARE0047/document.
Texto completo da fonteIn a context where the tensions linked to fossil energy resources are increasing, design a new way of understanding the energy context has become essential. The usual means of energy production and consumption have shown their limit with the appearance of new types of pollution for different sectors. In this thesis, we mainly focused on the electricity sector by proposing a tool to simulate electricity consumption and electricity production from renewable energies (RES). Simulation of electricity consumption allows having information on different observation scales based on a systemic and typological approach, according to which the associated carbon footprint to this consumption is being calculated as well as its annual cost. Subsequently, this consumption was analyzed at the hourly scale, which is to relate it to the production files in order to control the load curve. This control aims to smooth down the peaks of the load curve. The first analytical results, obtained by using the developed tools, show that it is possible to reduce the use of the normal electrical network to a certain level according to the dimensions of the RES production systems and storage
Labbé, Stéphane. "Développement d'un outil de coupe économique et écologique pour le broyage des végétaux : analyse du mode de coupe, prototypage et innovation des moyens de coupe et de broyage". Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0296/document.
Texto completo da fonteConsumption of fuelwood, mainly in the form of wood chips, is growing to achieve the goal fixed by the “Grenelle de l’Environment” Laws. Increasing wood chip production needs more and more raw materials and use of wood chippers or shredders is well established. These machines are very energy-consuming particularly in gasoline. First, this thesis presents original methods for measuring chipper performance and focuses on influence of cutting parameters on energy efficiency. Wood chipper energy performance is defined by the ratio between tonnes of dry wood chips and power consumed by the machine to produce them. Using energy efficiency determination method, all wood chippers will be compared and will help customer to choose the machine that consumes the least energy to produce wood chips. Wood chipper performance is measured at two different locations: one closer to the cutting area and the other at the wood chipper drive. The results show that wood chipper performance factor is properly defined and cutting parameters impacts wood chip performance. Cutting optimization halves the chipper fuel consumption to produce the same wood chips quantity. The results also show the limits of safeguard that reduce by 40% chipper performance. This thesis must help designers for developing more efficient machines to reduce their impact on the environment
Deneffle, Romain. "Définition d'une méthodologie d'allègement de structures sous contrainte de rigidité fonctionnelle, cas d'une machine-outil". Thesis, Université Clermont Auvergne (2017-2020), 2017. http://www.theses.fr/2017CLFAC022.
Texto completo da fonteIn response to the increase of environmental and economic constraints in industry, the issue of reducing and controlling energy consumption is highlighted in machine tool context. This thesis is part of the Green HSM project carried out by the PCI-SCEMM company with the aim of reducing the energy consumption of a machine tool by 30%. The study focused on the specific topic of lightweight design. The objective is to design machine tool structures with the smallest mass while maintaining functional rigidity.Two methods of lightening structures are proposed in the framework of this thesis. The first one presents a method for optimizing the structure of machine tools by stress analysis. This method allows reducing the mass of two main parts of the structure of 6.5% and 9% for an overall reduction in energy consumption of 3%. Another method for designing a lighter machine structure using topological optimization is proposed. The method is based on two specific parameters: the space design and DISCRETE. This method is presented in the optimization of a simple case of embedded beam subjected to a bending effort and gives good results. The use of the method on the X-axis carriage of a machine tool highlights the limitations of topological optimization in the case of complex structure studies and the influence of the initial solution choice
Delestrac, Paul. "Advanced Profiling Techniques For Evaluating GPU Computing Efficiency Executing ML Applications". Electronic Thesis or Diss., Université de Montpellier (2022-....), 2024. http://www.theses.fr/2024UMONS014.
Texto completo da fonteThe rising complexity of Artificial Intelligence (AI) applications significantly increases the demand for computing power to execute and train Machine Learning (ML) models, thus boosting the energy consumption of data centers. GPUs, enhanced by developments like tensor cores (2017), have become the preferred architecture. Building more efficient ML computing systems relies on a deep understanding of the limits of both parts of a tightly coupled hardware/software paradigm. However, the high abstraction of ML frameworks and the closed-source, proprietary design of state-of-the-art GPU architectures obscure the execution process and make performance evaluation tedious.The main goal of this thesis is to provide new methodologies to evaluate performance and energy bottlenecks of GPU-accelerated ML workloads. Existing profiling solutions are limited in three ways. First, ML framework profiling tools are designed to assist the development of ML models but do not give insights into the runtime execution of the ML framework. While these profiling tools provide high-level metrics on the GPU device execution, these metrics can be misleading and overestimate the utilization of the GPU resources. Second, lower-level profiling tools provide access to performance counters and insights on how to optimize GPU kernels. However, these tools cannot capture the efficiency of host/device interactions occurring at a higher level. Finally, when evaluating energy bottlenecks, the mentioned profiling tools cannot provide a detailed breakdown of the energy consumed by modern GPUs during ML training. To tackle these shortcomings, this thesis makes three key contributions organized as a top-down analysis of GPU-accelerated ML workloads.First, we analyze ML frameworks' runtime execution on a CPU-GPU tandem. We propose a new profiling methodology that leverages data from an ML framework's profiler. We use this methodology to provide new insights into the runtime execution of inference, for three ML models. Our results show that GPU kernels' execution must be long enough to hide the runtime overhead of the ML framework, increasing GPU utilization. However, this strive for longer kernel execution leads to the use of bigger batches of data, seemingly pushing the need for more GPU memory.Second, we analyze the utilization of GPU resources when performing ML training. We propose a new profiling methodology combining the use of high-level and low-level profilers to provide new insights into the utilization of the GPU's inner components. Our experiments, on two modern GPUs, suggest that bigger GPU memory helps enhance throughput and utilization from a high level. However, our results also suggest that a plateau has been reached, eliminating the push for bigger batches. Furthermore, we observe that the fastest GPU cores (tensor cores) are idle most of the time, and the tested workloads are now limited by kernels that do not use these cores. Thus, our results suggest that the current GPU paradigm is reaching a saturation point.Finally, we analyze the energy consumption of GPUs during ML training. We propose an energy model and calibration methodology that uses microbenchmarks to provide a breakdown of the GPU energy consumption. We implement and validate this approach with a modern NVIDIA GPU. Our results suggest that data movement is responsible for most of the energy consumption (up to 84% of the dynamic energy consumption of the GPU). This further motivates the push for newer architectures, optimizing memory accesses (e.g., processing in/near memory, vectorized architectures).This thesis provides a comprehensive analysis of the performance and energy bottlenecks of GPU-accelerated ML workloads. We believe our contributions uncover some of the limitations of current GPU architectures and motivate the need for more advanced profiling techniques to design more efficient ML accelerators. We hope that our work will inspire future research in this direction
Innocent, Morgane. "La valeur pour le consommateur d'une pratique de maîtrise de consommation : le cas de l'électricité". Thesis, Brest, 2017. http://www.theses.fr/2017BRES0118/document.
Texto completo da fonteThis thesis aims to understand the meaning that the consumer ascribes to his acts when one practises electricity consumption control (ECC) inside the dwelling. The value perceived by consumers associated with the various ECC’s activities, as, for example, to switch off devices in sleep mode, constitute a reflection of the meaning the consumer confers to this practice.We wondered, at first, about the nature of the sources of valuation and depreciation which emerge from the ECC. We identified twenty five sources which are so many appreciations or depreciations of the ECC for the consumer. Then, we tried to determine how these sources are structured and we were able to determine that, for consumers, the value of the ECC is characterized by seven components. Four of them are components of appreciation (environmental and citizen, of household management, the eudemonistic well-being and secondary profits). The three other are components of depreciation (experiential, social and associated with a lack of knowledge).Subsequently, we tried to understand how the value of the ECC emerges from the practice itself. We, also, wondered about the role of the various components (of appreciation and depreciation) in the ECC valuation for the consumer and in the conduct of action. We were able to confirm that the more an individual realizes ECC’s gestures, the more he appreciates this practice via the components of appreciation and the less he depreciates it via the components of depreciation. We also noticed that the meaning of the practice evolves and expands when practice becomes intensified. Two main levers set apart: the appreciation of ECC through its consequences on the household management and the eudemonistic wellbeing which is removed from this practice by the individual. The first one has a very strong influence on the evaluation of ECC by the consumers, and the second, once an individual really practises ECC, drives him to continue along this path
Rivallain, Mathieu. "Étude de l'aide à la décision par optimisation multicritère des programmes de réhabilitation énergétique séquentielle des bâtiments existants". Phd thesis, Université Paris-Est, 2013. http://pastel.archives-ouvertes.fr/pastel-00861172.
Texto completo da fonteRanjaranimaro, Manitra Pierrot. "Évaluation de la qualité environnementale, du fonctionnement énergétique des espaces batis à Madagascar : application des outils de simulation sur un site universitaire d’Antsiranana". Thesis, La Réunion, 2019. http://www.theses.fr/2019LARE0011/document.
Texto completo da fonteThe building sector accounts for more than 50% of global energy consumption. This consumption has been increasing steadily over the last thirty years. The environmental impact of energy consumption in this sector is constantly changing despite the recommendations made during the COPs. These findings are valid for metropolitan France and also for Madagascar. Beyond the control of energy consumption, during the operating phase of a built space, we must also take into account the environmental impacts of the construction phase, particularly with regard to climate change indicators, resource management and pollution. This thesis is based on three concepts. First, it is about the analysis of material flows around their technical characteristics and their environmental and economic impacts during the construction of the built space. In a second step, our analysis focuses on the analysis of energy flows in order to know the energy and environmental signature of the functioning of the built space and the implementation of a time file reflecting the characteristics of energy consumption (Daily and annual consumption profile). Finally, we also discuss the problem of managing the distribution of electrical energy in a built-up area in order to size an renewable energy production system and a storage system and to smooth the consumption curve at the level of the distribution network
Le, Mounier Audrey. "Méta-optimisation pour la calibration automatique de modèles énergétiques bâtiment pour le pilotage anticipatif". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT038/document.
Texto completo da fonteIn order to tackle the actual climate issues, the building field is encouraged to reduce his energetic consumption without changing the occupant’s comfort. In this context, the aim of the ANR PRECCISION project is to develop tools and methods for energetic management of the buildings which needs the use of dynamical thermal models. The PHD works, realise between the G2Elab and the G-SCOP, was focused on models parametric estimation issues. Indeed, uncertainties due to unknown phenomena and the nature of models lead to difficulties for the calibration of the models. Nowadays, this complex procedure is still not automatable: auto-regressive models have a low capacity to extrapolate because of their inadequate structure, whereas the physical models are non-linear regarding many parameters: estimations lead towards local optimums which highly depend on the initial point. In order to eliminate these constraints, several approaches have been explored with physical models adapted for which identifiability studies have been reached on an experimental platform: PREDIS MHI. Different optimisation strategies will be proposed in order to determine the parameters which can be estimated. The first approach uses an analyse a priori of the parametric dispersion, the second one use a meta optimisation which dynamicaly determined as the optimisation sequence, the parameters which can be readjusted. The results are analysed and compared to several approaches (universal models, “simple” identification of all the parameters of a physical model, genetic algorithm …) in different application cases
Amador, Erick. "Décodeurs LDPC à faible consommation énergétique". Phd thesis, Paris, Télécom ParisTech, 2011. https://pastel.hal.science/pastel-00599316.
Texto completo da fonteIterative decoding techniques for modern capacity-approaching codes are currently dominating the choices for forward error correction in a plethora of applications. Turbo codes, proposed in 1993, triggered the breakthrough in channel coding techniques as these codes approach the Shannon capacity limit. This was followed by the rediscovery of low-density parity-check (LDPC) codes in the 1990s, originally proposed in 1963. These codes are presently ubiquitous in the context of mobile wireless communications among other application domains. In this dissertation, we focus on the aspects and challenges for conceiving energy efficient VLSI decoders aimed at mobile wireless applications. These nomadic devices are typically battery-operated and demand high energy efficiency along with high throughput performance on the smallest possible footprint. Moreover, these iterative decoders are typically one of the most power intensive components in the baseband processing chain of a wireless receiver. We address the aspects for designing energy efficient LDPC decoders. At the algorithmic level we investigate the tradeoff among error-correction performance, energy efficiency and implementation area for different choices of message computation kernels. At the architectural level we focus on the memory subsystem design of an LDPC decoder since this module is responsible for the majority of the implementation area and power consumption. Finally, at the system level, we propose dynamic power management strategies that rely upon iteration control and workload prediction that may be applied to both Turbo and LDPC decoders
Amador, Erick. "Décodeurs LDPC à faible consommation énergétique". Phd thesis, Télécom ParisTech, 2011. http://pastel.archives-ouvertes.fr/pastel-00599316.
Texto completo da fonteVillot, Jonathan. "Bâtiments et facteur 4, de l'émergence d'un objectif global à son application au niveau local. : Analyse des problématiques de rénovation dans le secteur résidentiel à caractère social". Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2012. http://tel.archives-ouvertes.fr/tel-00739707.
Texto completo da fonteVoyé, Pierre. "Valeur verte et approches spatialisées de la maîtrise de la demande d’énergie". Thesis, Bourgogne Franche-Comté, 2019. http://www.theses.fr/2019UBFCG007.
Texto completo da fonteThe current environmental and economic context implies a need to manage energy demand. In order to do this, understanding completely the determinants of energy demand is first required. Also, there is a need to find tools to reduce energy consumption. In this thesis, we are interested in the consequences of a household’s choice of location on energy consumption and on the role of the green value to promote the adoption of energy-efficient buildings by households. The first chapter analyzes an urban microeconomic model of residential choice of location and energy consumption. In order to complete this theoretical analysis, we estimate the energy demand of the residential sector. The second and third chapters study the green value and its role in the promotion of green buildings. In chapter 2, we present a meta-analysis of the literature estimating the green value. In chapter 3, we use a spatial hedonic model to estimate the residential green value for the urban area of Dijon. Finally, in the last chapter, we study the residential choice of households concerning the energy performance of their dwelling. To do so, we estimate the probability of households to live in an energy-efficient building or not. The results of these estimates and the results of the previous chapters are then mobilized to discuss the efficiency of the public policy used for managing energy demand
Atallah, Tarek. "Measuring the Transition toward Less Energy Intensive Economies : modeling Solutions for the Demand-Side". Thesis, Paris Sciences et Lettres (ComUE), 2016. http://www.theses.fr/2016PSLED024.
Texto completo da fonteThe world is currently witnessing a transition in the energy scene that is significantly characterized by global economic growth dynamics, climate change negotiations and volatile energy prices. Rapidly evolving regulatory and macro-economic environments heavily impact on the demand-side of energy, forcing governments to acquire an ever-increasing set of quantitative tools to better assess the results of their taxation policies.This thesis addresses some of these issues by analyzing various facets of energy demand in order to generate sensible demand and price elasticities with real-life applications in sustainable energy management. For that purpose, a combination of cluster, decomposition and multiple econometric analysis is undertaken at global, regional and country-specific levels for households complemented by a policy analysis. A special focus is made on modeling consumer demand behavior for resource-rich economies of the Gulf Cooperation Countries, and the potential impact of removing residential electricity subsidies on the net societal welfare of Saudi Arabia
Daoud, Rasha. "La consommation énergétique domestique pour le chauffage en France". Thesis, Lille 1, 2018. http://www.theses.fr/2018LIL1A007/document.
Texto completo da fonteWe analyze in this work the determinants of the energy source for heating choice and its impact on the households living in France energy consumption and expenses. This thesis is written in five chapters. In the first we show the lack of data relative to home's energy consumption and we present a set of descriptive statistics showing some features of the energy consumption and expenses in the French dwellings. In the second chapter we describe in details the utilization of energy for heating in the French residential park and we make use of a discrete choice model to determine the factors intervening in the choice of heating equipments.In the third chapter we analyze the determinants of the energy demand for heating and the overall energy expenses in all the French dwellings by estimating a series of econometric models inspired by Dubin and Mcfadden (1984) used to deal with the selection biais.In the fourth chapter we concentrate on the rental sector to determine its singularities on the one hand, and, on the other hand, to find out the features which distinguish the social sector from the private sector concerning the heating equipment choice and the energy consumption and expenses levels. And last but not least, the fifth chapter is dedicated to lay the foundations of a theoretical model formalizing the behavior of all the agents toward energy when the heating bill is collective. It is worth noting that so far, there isn't any model dealing with this question
Jeanjean, Anaïs. "Approche d'intégration énergétique dans une maison basse consommation d'énergie". Perpignan, 2013. http://www.theses.fr/2013PERP1124.
Texto completo da fonteBalderas, Hill Rafael. "Conception des robots rapides à consommation énergétique drastiquement réduite". Thesis, Ecole centrale de Nantes, 2019. http://www.theses.fr/2019ECDN0028.
Texto completo da fonteIt is well-known that one of the most representative future challenges in industrial robotics, is to increase the energy efficiency of robot manipulators. In industrial applications, such as high-speed pick-and-place operations, the accuracy is typically the most important criteria to measure the robot performance. Nevertheless, the design trends to operate at high speeds are shifting to the design of robots, which are not only accurate, but also they can perform in an energy-efficient way. This thesis proposes an actuation principle for reducing the energy consumption of high-speed robots by placing variable stiffness springs (VSS) in parallel to the motors that actuate the links of a high-speed robot. The main idea is to smartly tune online the force/displacement relation of the VSS, associated to the VSS stiffness, so that the robot is put in near a resonance mode, thus considerably decreasing the energy consumption during fast pseudoperiodic pick-and-place motions. By adding a spring with controllable stiffness in parallel to the robot actuated links, two performances are achieved: i) direct power connection between the motor and the robot links, thus ensuring accuracy at high-speeds; ii) control of the stored potential energy to be released per cycle of the pick-and-place motion, thus exploiting the robot natural dynamics at highspeeds, and therefore reducing the energy consumption. The experimental results of the suggested approach on an industrial-sized prototype show the drastic reduction of energy consumption for fast quasi-periodic pick-and-place-like motions
Roumegoux, J. P. "Contribution à la modélisation de la demande énergétique des véhicules industriels". Ecully, Ecole centrale de Lyon, 1990. http://www.theses.fr/1990ECDL0025.
Texto completo da fonteAmeur, Hocine Abdelhakim. "Vers des réseaux hétérogènes sans fil efficaces en consommation énergétique". Thesis, Troyes, 2016. http://www.theses.fr/2016TROY0034.
Texto completo da fonteThe environment is undergoing a significant damage caused by the use of non-renewable energy sources. The information and communications technology sector is responsible for 2% of the global carbon footprint. Statistics show also that the energy consumed by wireless networks represents around 10% of the annual energy consumption. With the widespread of the Internet of Things, cellular networks are becoming the most used communication technology. Therefore, these networks start using heterogeneous infrastructures to address the lack of capacity.In this thesis, we focus on studying the energy saving problem within cellular networks. In particular, the energy consumed by heterogeneous cellular networks, which are known by their main importance in the future communication architectures namely, 5G networks. Heterogeneous networks (HetNets) use different types of access technologies. In addition to the conventional base stations, these networks introduce the concept of small cells which is characterized by the use of Microcells, Picocells and Femtocells. This diversity offers several advantages in terms of spectral efficiency, network coverage and capacity
Noureddine, Adel. "Vers une meilleure compréhension de la consommation énergétique des systèmes logiciels". Phd thesis, Université des Sciences et Technologie de Lille - Lille I, 2014. http://tel.archives-ouvertes.fr/tel-00961346.
Texto completo da fonteDesreveaux, Anatole. "Impact de facteurs techniques sur la consommation énergétique de véhicules électriques". Thesis, Lille 1, 2020. http://www.theses.fr/2020LIL1I004.
Texto completo da fonteGlobal Warning is one of the major challenges for the 21st century. The transport sector is one of the biggest emitters of greenhouse gas. Electric Vehicles (EVs) are one of the solutions able to reduce those emissions. However, the driving range of the vehicle is one of the barriers for EVs’ adoption. The Campus of University with Mobility based on Innovation and carbon Neutral (CUMIN) program aims at reducing the greenhouse gas emissions produced by mobility at campus “Cité Scientifique” of the University of Lille. EVs are one of the solutions studied to reduce emissions on this campus. For this solution, the university wishes to study the implementation of charging stations to promote EVs. In order to do this, a tool for estimating the energy consumption of an EV is required.Many factors have an impact on the energy consumption of EVs or their driving range. It is necessary to evaluate the effects of the different factors so as to have a better estimation of the driving ranges of those cars. In this PhD Thesis, the impact of different factors on the energy consumption of an Electric Vehicle has been assessed with a simulation tool developed on purpose. The suggested tool takes into account the energy consumption of the traction system, the Heating, Ventilation and Air Conditioning (HVAC) system and the other auxiliaries of the vehicle. This tool has been developed with Energetic Macroscopic Representation. This formalism aims at organizing the model using a forward approach. With this approach, it is possible to take into account the limitations of the system in the simulation tool of the vehicle. In this thesis, the modeling of the different parts have been developed, then validated with experimental tests. Finally, simulations have been carried out to evaluate the impact of the different factors on the energy consumption of an EV
Kpoviessi, Josias Mahouna. "Facteurs incitant les agents économiques à changer ou lisser leur consommation énergétique". Thesis, Lille, 2021. http://www.theses.fr/2021LILUA002.
Texto completo da fonteUnderstanding energy behaviour is necessary for the success of the energy transition. This is the object of this thesis.The first chapter describes the characteristics, challenges and the effects and effectiveness of different instruments to manage the demand side.The second chapter focuses on financial incentives to encourage the reduction of energy consumption. Based on a laboratory experiment, our results show that financial incentives (presented as a bonus in this thesis) serve as benchmarks to guide energy consumption. They encourage the least sober individuals to tend towards energy sobriety but, on the contrary, they partially crowd out the intrinsic motivations of the most sober.The final chapter investigates how to communicate. Indeed, attention can be drawn to the negative externalities and also to the positive externalities generated by consumption. We study the effect of this framing with a single shot linear public good experiment with simultaneous decisions, with and without risk. The participants cooperate more in a stochastic environment than in a deterministic one, and even more so when the emphasis is on losses.This can be explained by the fact that uncertainty favourably shifts extreme behaviours. Women in particular are the ones for whom the changes in behaviour are most marked
Hemery, Carine. "Prospectives à long terme de la consommation énergétique en transport de marchandises". Paris 1, 2009. http://www.theses.fr/2009PA010035.
Texto completo da fonteNait, Meziane Mohamed. "Identification d’appareils électriques par analyse des courants de mise en marche". Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2063/document.
Texto completo da fonteThe related field to this work is called “energy disaggregation" where the main concern is to break down, or disaggregate, the global electrical energy consumption (e.g. wholehouse consumption) into a detailed consumption given as end-use (e.g. appliance-level) consumption information. This latter gives consumption feedback to consumers and electricity providers and is helpful for energy savings. Three main questions have to be answered in the energy disaggregation field : who is consuming ? when ? and how much ? The research conducted in this thesis focuses on electrical appliances identification, i.e. the who question, considering particularly home appliances. For this purpose, we use the turn-on transient current signal which we model using a new model we proposed and use its estimated model parameters for the identification task
Tittelein, Pierre. "Environnements de simulation adaptés à l'étude du comportement énergétique des bâtiments basse consommation". Phd thesis, Chambéry, 2008. http://tel.archives-ouvertes.fr/tel-00350664.
Texto completo da fonteLes environnements de simulation énergétique existants ont été conçus pour des bâtiments classiques pour lesquels les consommations sont beaucoup plus importantes que celles fixées pour 2012, il faut donc voir si les modèles mais aussi les méthodes de simulations utilisés correspondent toujours aux spécificités de ces nouveaux bâtiments. L'objectif de ce travail est de montrer l'intérêt d'utiliser un environnement de simulation basé sur les systèmes d'équations pour étudier le comportement énergétique des bâtiments basse consommation.
Pour cela, plusieurs modèles ont été implémentés dans l'environnement SIMSPARK. Il s'agit d'un modèle de matériau à changement de phase, d'un modèle de prise en compte du rayonnement de courtes longueurs d'onde par calcul de la tache solaire et d'un modèle d'échangeur air-sol. Ils ont été intégrés dans un modèle global de bâtiment basse consommation ce qui a permis de montrer les avantages de l'environnement de simulation utilisé. Le fait qu'il soit orienté objet permet de valider indépendamment les nouveaux modèles puis de les intégrer facilement à un modèle de niveau hiérarchique supérieur. Le fait qu'il soit basé sur les systèmes d'équations a permis grâce à la non orientation a priori du modèle d'inverser le sens de résolution de plusieurs problèmes dans une simulation dynamique. Enfin, la robustesse des méthodes de résolution utilisées a été éprouvée.
Harari, Stéphanie. "Contrôle modal semi-actif et actif à faible consommation énergétique par composants piézoélectriques". Phd thesis, INSA de Lyon, 2009. http://tel.archives-ouvertes.fr/tel-00443734.
Texto completo da fonteBenali, Wissem. "Modélisation et optimisation de la consommation énergétique d'un système de communication Wi-Fi". Thesis, Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2017. http://www.theses.fr/2017IMTA0041/document.
Texto completo da fonteThe strong increase of the number of connected devices in recent years and the increasing use of communication technologies has a significant impact on the energy bill. To stop the increase in energy consumption, it is essential to be able to compare the digital communication algorithms in terms of consumption, in order to develop the most energy-efficient transmission architecture.In this thesis, the IEEE 802.11ac Wi-Fi standard of physical layer is analyzed at an energy point of view. The power dissipated in the circuits for operating the signal processing algorithms is taken into account in addition to the antenna transmission power. The implemented methodology includes both simulations and developments on a hardware platform (FPGAs), resulting in more realistic consumption assessments.First, we analyzed separately the components of the digital communications chains. Then we integrated the periods of activity and inactivity of each element in the calculation of the global energy consumption of the chains. We propose a practical and efficient method of estimating consumption, including a database derived from simulations, and a theoretical analysis of the activity rates of each element of the chain.These results make it possible to analyze the distribution of the power consumption of the elements composing transmitters and receivers, and to compare various architectures and sets of parameters. In particular, we evaluated the impact of two Fast Fourier Transform architectures on overall system consumption
Choutri, Amira. "Gestion des ressources et de la consommation énergétique dans les réseaux mobiles hétérogènes". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLV043/document.
Texto completo da fonteThe objective of this thesis is to develop methods for a targeted and efficient management of users mobility in heterogeneous mobile networks. This network is characterized by the deployment of different types of cells (macro, micro, pico and/or femto). The massive deployment of small cells (pico and femto) provides a supplementary coverage and capacity to mobile networks, specially in dense areas. However, the resulting real-time constraints limit the offered QoS. Furthermore, for commercial and/or environmental reasons, the needs to reduce the energy consumed by mobile networks became reality. Thus, mobile operators have to find a good compromise between, on the one hand, the users velocity and the guaranteed QoS, and on the other hand, the cost of deployment of such networks. For that, in the context of users mobility management, we propose models for resource and energy consumption management of base stations. The first model aims at controlling resource sharing between clients of the mobile operators. Based on a mobility prediction of users, this model anticipates the resource management of a base station. The second model aims at reducing energy consumption of the network by managing mobile users assignment to detected cells. This allows a continuous control of consumed energy of base stations while offered QoS is guaranteed. Based on simulation of a real mobile network topology, the performances of proposed models are evaluated while considering different possible scenarios. They are compared to the performances of different strategies as the ones proposed in literature or adopted by current mobile operators