Tesis sobre el tema "Four à chaux"
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte los 32 mejores tesis para su investigación sobre el tema "Four à chaux".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.
Kerdouss, Fouzi. "Simulation tridimensionnelle d'un four à calcination des boues de la chaux". Sherbrooke : Université de Sherbrooke, 2001.
Buscar texto completoKerdouss, Fouzi. "Simulation tridimensionnelle d'un four à calcination des boues de la chaux". Thèse, Université de Sherbrooke, 2001. http://savoirs.usherbrooke.ca/handle/11143/1735.
Texto completoBouesso, Bénit. "Replacing fossil fuels with biosourced fuels in limekilns : investigation of the thermal behavior and environmental impact". Electronic Thesis or Diss., Ecole nationale des Mines d'Albi-Carmaux, 2024. http://www.theses.fr/2024EMAC0014.
Texto completoThis work investigates the feasibility of using biocarbon as an alternative limekiln fuel to substitute coal in the Soda Ash process. Biocarbons were produced from solid refuse fuel (BC) and wood (WBC). Anthracite was selected as the reference fossil fuel to be replaced, and biocoke from coconut shell was also considered for comparison. Samples were characterized in terms of chemical composition, physical and thermal properties. Fuel thermal stability and combustion performance were evaluated using thermogravimetric analysis. Emissions assessment was performed in pyrolysis and combustion from lab-scale to pilot-scale, so that extreme limekiln conditions were reproduced. The results showed that devolatilization increased biocarbon thermal stability, making its behavior close to that of anthracite. Biocoke and biocarbons showed lower ignition temperatures but a higher burning index compared to anthracite, which was shown as the most stable fuel. CO2 emissions from WBC were higher than those of BC samples. Amongst the volatile organic compounds released, polycyclic aromatic hydrocarbons (PAH) were identified and quantified. Even if biocarbon produced PAH with less rings (<5) in pyrolysis and combustion, its emissions were higher compared to anthracite. To mitigate biocarbon reactivity, a 50/50 biocarbon/anthracite co-combustion was proposed, thus offering the advantages of higher ignition temperature and lower emissions
Perron, Jean. "Modélisation mathématique simplifiée d'un four de métal chaud /". Thèse, Chicoutimi : Université du Québec à Chicoutimi, 1987. http://theses.uqac.ca.
Texto completoLiem, Winson y 林維. "Housing for the Tanka in Cheung Chau". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31984046.
Texto completo林潔賢 y Kit-yin Canace Lam. "Battling for the environment on Peng Chau". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2001. http://hub.hku.hk/bib/B31972470.
Texto completoLam, Kit-yin Canace. "Battling for the environment on Peng Chau". Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk/hkuto/record.jsp?B25205808.
Texto completoLiem, Winson. "Housing for the Tanka in Cheung Chau". Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2595264x.
Texto completoCrenn, Bernard. "Les fours à chaux des marges armoricaines : 1775-fin des années 1950 : la grande mue d'une petite industrie". Paris, EHESS, 1998. http://www.theses.fr/1998EHES0132.
Texto completoLime making, mainly in limekilns supplied with coal, is a caracteristic activity on the armorican fringes in france (maine-et-loire, mayenne, western sarthe) during the 19th century. This know-how is turning to good account the local limestone quarries and often the regional coal mines. The dominant production is lime for agricultural enrichment ; it reaches its peak about 1860. To better understand the evolution on a long-lasting period, we have opted for an analysis beginning 1775 and going to 1939. The study which is inserted in a large conception of technical history, concerns the transformations of technics, sites, landscapes, enterprises, social conditions and economic strategies. The first part is dedicated to the analysis of the dissemination of a technic, the coal limeburning, during the period 1775-1839. A know-how, already made up on the banks of the angevin basse-loire, spread around and this scattered making takes proto- industrial aspects. The second part underscores trends toward mass production and concentration from the beginning of the 1840's to the end of the 1870's, insisting on the implication of some local mining societies in the lime production. The third part shows at ounce, from 1880 to 1939, the declines of some traditional production forms and the existence of resistance poles, led by families or societies. It takes into consideration the problem of reconversion of sites and people
Vaschalde, Christophe. "L’art de cuire la pierre en France méditerranéenne à la fin du Moyen Âge : Approche interdisciplinaire d’un artisanat méconnu : la chaufournerie". Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM3075.
Texto completoLime burning is a section of handmade production interfacing with construction and uses of fire. With pluridisciplinary approach, a statement of this unwell known craft was exposed. During the second Middle Age, making lime technics used in the Mediterranean north-occidental areas are plural. Natural environment makes a great influence on the used technics and also on the ways to organize this craft. Before cooking the lime, lime burners are using intricated technic process in collecting and transforming materials for kilns use. The limestone must be extracted, crushed then charged up. Several “chaînes opératoires” are involved in making the lime. This multiplicity is not only a technic one but a social translation also. If the cooking section is indeed leaded by professionals handworkers, other technic sections can be consigned by other kind of workers even sometimes for just only one section. The handworkers expertise appears to be resulting material and technic restraints, but also social ones. Lime burning hold a special position in both society and economy in the end of the Middle Age. Despite the essential use of lime production in some particular industry, lime burners – not numerous - are only holding a secondary position in the medieval society
Bertolini, Florencia Fernández. "Portraits, biographies et fours à chaux : images, mémoire et construction patrimoniale de l'exploitation minière dans une ville d'Argentine à la fin du XXe siècle". Master's thesis, Universidade de Évora, 2021. http://hdl.handle.net/10174/31697.
Texto completoHumaish, Hussein Hafudh. "Thermal techniques for characterizing building insulation materials". Thesis, Amiens, 2016. http://www.theses.fr/2016AMIE0034/document.
Texto completoThis thesis is part of a long-term objective to determine in situ (and / or in use) the thermal properties of building insulation materials. We want to reduce the gap between the laboratory measurement and the actual performance of insulation in buildings walls. We have set two main objectives during this study: 1- To study the possibility of using a non-steady state hot probe for measuring thermal properties of insulants. 2- To study the thermal behaviour of insulation materials in use by using a guarded hot box. Climatic conditions in temperature and humidity close to real situations can be submitted supported by hot and cold cells. This work has shown the interest of using thermal probe to characterize insulating materials. Guarded hot box is also interesting for studies in real conditions and to followheat and mass transfer in buildings walls
Cook, Patricia Maria 1965. "Basal platform mounds at Chau Hiix, Belize: Evidence for ancient Maya social structure and cottage industry manufacturing". Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/282545.
Texto completoOuedraogo, Modeste. "Contribution à l'étude des mouvements de brassage turbulents dans le four à creuset à induction, par traitement du signal d'une sonde anémométrique à film chaud". Paris 6, 1986. http://www.theses.fr/1986PA066131.
Texto completoOuedraogo, Modeste. "Contribution à l'étude des mouvements de brassage turbulents dans le four à creuset à induction, par traitement du signal d'une sonde anémométrique à film chaud". Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37600178k.
Texto completoNguyen, Lu Trong Khiem [Verfasser], Khanh Chau [Gutachter] Le y Klaus [Gutachter] Hackl. "Whitham modulation theory and direct methods for nonlinear dispersive waves / Lu Trong Khiem Nguyen ; Gutachter: Khanh Chau Le, Klaus Hackl". Bochum : Ruhr-Universität Bochum, 2016. http://d-nb.info/1121909582/34.
Texto completoYeung, Kin-wai. "A comparative study of the relative strengths and weaknesses of the self-help and Lap Shun Training Programmes of the Society for the Aid and Rehabilitation of Drug Abusers /". [Hong Kong : University of Hong Kong], 1986. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1232596X.
Texto completoYu, Pui-shan. "The potential for using biomonitoring in the Hong Kong marine environment /". Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17457622.
Texto completoHumaish, Hussein Hafudh. "Thermal techniques for characterizing building insulation materials". Electronic Thesis or Diss., Amiens, 2016. http://www.theses.fr/2016AMIE0034.
Texto completoThis thesis is part of a long-term objective to determine in situ (and / or in use) the thermal properties of building insulation materials. We want to reduce the gap between the laboratory measurement and the actual performance of insulation in buildings walls. We have set two main objectives during this study: 1- To study the possibility of using a non-steady state hot probe for measuring thermal properties of insulants. 2- To study the thermal behaviour of insulation materials in use by using a guarded hot box. Climatic conditions in temperature and humidity close to real situations can be submitted supported by hot and cold cells. This work has shown the interest of using thermal probe to characterize insulating materials. Guarded hot box is also interesting for studies in real conditions and to followheat and mass transfer in buildings walls
Ylinh, Lê. "Le maître et les génies : musique et rituel dans le culte de possession hầu bóng (Việt nam)". Thesis, Paris 4, 2012. http://www.theses.fr/2012PA040066.
Texto completoThe possession ritual practice in Vietnam has been prohibited during more than forty years (from 1954 to early nineties). The field-works are done during this important period. These studies try to portray an outline of the organisation and development of the rite and its music and musicians, especially the most important master at his time, Pham Van Kiêm. They also try to explore the musical technics used by masters and their role in the ritual practice, the music-language, musical directory-deities pantheon relationships. This crucial account allows to put into a perspective this complex practice, very popular nowadays
Wang, Shiqi. "Experimental and Numerical Study of Micro-Fluidic Oscillators for Flow Separation Control". Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0017/document.
Texto completoFluidic oscillators which can generate periodic excitations are very promising for active flow control applications, due to their reliability and robustness, as their internal flow oscillation is totally self-induced and self-sustained. The main objective of this work is to identify the underlying mechanisms controlling the dynamics of this kind of fluidic oscillator and to propose guiding lines for the design of oscillators. Experimental analysis of several oscillator prototypes and associated numerical simulations have permitted to explain that the jet switching in this kind of oscillator is controlled by pressure gradients in two critical parts of the device. From these analyses, a simple function has been proposed to estimate the oscillation frequency. Two synchronization methods, allowing the control of the phase lag between the actuators, have been proposed and validated experimentally and by numerical simulations. An array of micro-fluidic oscillators has then been designed and tested on a ramp separated flow, showing much higher efficiency compared to other kind of fluidic actuators tested on similar wall flows in previous studies
Fekom, Mathilde. "Sequential Resource Allocation for network diffusion control". Thesis, université Paris-Saclay, 2021. http://www.theses.fr/2021UPASM008.
Texto completoThe dynamic containment of an undesired network diffusion process, such as an epidemic, requires a decision maker (DM) to be able to respond to its evo- lution by taking the right control actions at the right moments. This task can be seen as managing the alloca- tion of a limited amount of resources to the graph nodes, with the objective to reduce the effects of the process.In this thesis we extend the Dynamic Resource Alloca- tion (DRA) problem and propose a multi-round dynamic control framework, which we realize through two derived models: the Restricted and the Sequential DRA (RDRA, SDRA). Contrary to the standard full-information and full-access DRA considerations, these new models take into account possible access restrictions regarding the the available information about the network and/or the ability to act on its nodes. At each intervention round, the DM has limited access to information related to a fraction of the nodes, and is also gaining access to act on them in a sequential fashion. The latter sequential as- pect in the decision process offers a completely new per- spective to the dynamic diffusion process control, making this work the first to cast the dynamic control problem as a series of specially designed sequential selection pro- cesses.In the Sequential Selection Problem (SSP), immediate and irrevocable decisions need to be made by the DM as candidate items arrive randomly and get examined for one of the limited selection slots available. For the needs of network diffusion control, what we propose translatesinto selecting the right nodes to allocate the control re- sources in a multi-round sequential process. However, standard SSP variants, such as the very well-known sec- retary problem, begin with an empty selection set (cold- start) and perform the selection process once over a single candidate set (single-round). These two limita- tions are addressed in this thesis. First, we introduce the novel Warm-starting SSP setting that considers hav- ing at hand a reference set, which is a set of previously selected items of a given quality, and tries to update optimally that set while examining the sequence of ar- riving candidates, constrained by being able to update the assignment to each selection slot (resource) at most once. The Multi-round Sequential Selection Process, the new online-within-online problem, is then introduced as a natural extension of the warm-starting selection.Both rank-based and score-based ob jective functions over the final selection are considered. A cutoff-based approach is proposed for the former, while the optimal strategy based on dynamic thresholding is derived for the latter assuming that the score distribution is known. These strategies are then put in comparison for their efficiency in the traditional selection setting as well as in solving network control problems that motivated this thesis. The generality of the introduced models allow their application to a wide variety of fields and problems; for instance, reoccurring recruiting processes, manage- ment of resources (e.g. beds, staff) in healthcare units, as well as tackling difficult combinatorial problems under constrains, such as the b-diversification problem found in data-stream processing applications (e.g. in robotics)
Cantin, Oriane. "PEO hot melt extrudates for controlled drug delivery". Thesis, Lille 2, 2016. http://www.theses.fr/2016LIL2S035/document.
Texto completoAmong continuous manufacturing processes, hot melt extrusion is a technique with growing interest in the pharmaceutical field. This process enables the formation of solid dispersions of many drugs within a polymeric or lipidic carrier. Hot melt extrusion can be widely used for different issues using the appropriate carrier and drug. Here are the mostly used concepts in pharmaceutical solid dosage forms: (i) immediate release, (ii) modified release and (iii) taste masking. Modified release systems have been taken into account to be very interesting devices for the improvement of drug- bioavailability, drug- efficacy as well as the patient compliance. Various systems with different release mechanisms can be manufactured, depending on the nature of the carrier (inert, erodible, and swelling matrices). Poly ethylene oxide is a semi crystalline and hydrophilic polymer which can be used to control drug delivery. The poly ethylene oxide melting point ranging from 63 to 67 °C makes it suitable for hot melt extrusion. Importantly, the swelling capacities of the hydrophilic poly ethylene oxide matrices are able to deliver drug in a time controlled manner, in respect of the poly ethylene oxide molecular weights. The purposes of this work were (i) to study the impact of critical process parameters (extrusion temperature and screw speed) on the drug release behavior, (ii) to determine the impact of formulation parameters (poly ethylene oxide molecular weight, nature of drug and drug loading) on drug release kinetics, and (iii) to evaluate solid dosage forms prepared by hot melt extrusion versus direct compression. Interestingly, the variation of the extrusion temperature and the screw speed leads to the altering of the extrudate appearance and thus the distribution of drug into the extrudate. However, this changing has not influenced the drug release remarkably. Thus, this study was useful to set the parameters for the following projects (temperature 100 °C; screw speed 30 rpm; dosage form size 1 cm). Poly ethylene oxide hot melt extrudates containing 10 % theophylline and based on 100 - 7,000 kDa poly ethylene oxide are used for this thesis. Importantly, the drug release decreased substantially with the increase of the poly ethylene oxide molecular weight from 100 to 600 kDa. However, further increasing of the molecular weights leads to only a slight decrease in the release rate. Swelling studies have shown that this phenomenon correlated with the change in volume of the opaque part of the extrudates (non-transparent gel and solid core)
Close, Damien. "Alternative protective coatings for hot stamped automotive body parts". Thesis, Université de Lorraine, 2018. http://www.theses.fr/2018LORR0083/document.
Texto completoVarious coatings are currently available for press-hardened steels used for the automotive construction, mainly with the aim of providing good anticorrosive properties to the body components. In order to improve performance of the coated products in terms of hot formability, corrosion protection and suitability for subsequent manufacturing processes, steelmakers and car manufacturers investigated various alternative coating materials. Only a few solutions resulted in a serial production. The aim of this study is to proceed to a screening of the performance of current coating variants, to identify new concepts for alternative coating materials and assess their suitability for the hot stamping application. The present work is focused on the study of Zn-Mn alloy coatings. Various electroplating baths and electric parameters were studied in order to determine optimal deposition conditions for obtaining Zn-Mn alloys with high Mn contents. The deposits obtained on large-scale steel plates were characterized with regards to their crystallographic, microstructural and anticorrosive properties. The behavior of the coating materials during austenitizing treatment was studied after heat treatment to different temperatures and heating durations. A particular attention was given to the evolution of the composition, the interdiffusion phases formed as well as to the presence of oxidation and evaporation mechanisms at high temperature. At last, the forming properties of the alternative coating materials and their susceptibility for liquid metal embrittlement were assessed on the basis of direct hot stamping experiments
Benzine, Youcef. "Enzymatically triggered polymeric drug delivery systems for colon targeting". Thesis, Lille 2, 2019. http://www.theses.fr/2019LIL2S036.
Texto completoChronic inflammatory bowel diseases (IBD) today affects close to 200,000 people in France. They are characterized by the inflammation of the wall of a part of the digestive tract. They usually include Ulcerative Colitis and Crohn’s disease. Both are chronic diseases that involve inflammation of the colonic mucosa. The main difference between Crohn’s disease and Ulcerative Colitis is the location and nature of inflammation. Crohn’s disease can affect any part of the GIT from mouth to anus but in most cases attacks the terminal ileum. In contrast, Ulcerative Colitis is restricted to the colon and the rectum. An ideal dosage form should effectively protect the drug in the stomach and small intestine and subsequently release the drug in the colon in a targeted and controlled manner. The objective of this work was to develop new drug delivery systems containing a polysaccharide (pectin, guar gum, inulin ...), which are degradable by the colonic bacteria and a hydrophobic thermoplastic polymer (ethylcellulose, polyurethane, polyvinyl acetate ...), which will reduce the hydrophilicity of the polysaccharide. The technique used for the preparation of these dosage forms is hot-melt extrusion. It is a continuous and free solvent process that allows the manufacturing of a dosage form called "extrudate" by forcing the soften material through an orifice. It has been demonstrated that extrudates based on polyvinyl acetate/polyurethane and inulin can minimize the release of a model active substance in the upper part of GIT due to the hydrophobic properties of polyvinyl acetate. Indeed, these extrudates uptake low amount of water and lose low dry mass upon exposure to media simulating the stomach and the small intestine. However, once in contact with the colonic flora, these systems show a considerable loss of mass due to the degradation of inulin by enzymes secreted by colonic bacteria. In another study, hot melt extrudates based on ethylcellulose blended with different types of polysaccharides (guar gum, inulin, corn starch, maltodextrin, pectin and chitosan) were studied for the development of controlled drug delivery systems. Anhydrous theophylline and diprophylline have been used as model drugs. This study was useful to set the extrusion parameters: temperature 100 °C; screw speed 30 rpm; feed rate 3 cc/min; 30 % dibutyl sebacate as a plasticizer. Importantly, hot melt extrudates based on ethylcellulose:guar gum blends offer an interesting potential as controlled drug delivery systems: They can be prepared at temperatures of about 100 °C, provide broad spectra of drug release patterns (in particular about constant drug release rates). Finally, hot melt extrudates remained stable after 1 year storage at ambient conditions
Aor, Bruno. "Engineering microchannels for vascularization in bone tissue engineering". Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0430/document.
Texto completoIn vitro, tubular-like structures formation with human umbilical vein endothelial cells (HUVECs) was investigated by combining material chemistry functionalization and three-dimensional geometry development. Polycarbonate (PC) was used as a template for the development of the scaffold. Natural polysaccharide’s film based on alternate layer-by-layer (LbL) deposition of hyaluronic acid (HA) and chitosan (CHI), was first applied to PC surface and characterized in terms of thickness growth both, in dry conditions using ellipsometry, and confocal lascar scanning microscopy (CLSM). This first functionalization results in a complete coating of the PC layer. Further biofunctionalization with one adhesive peptide (RGD) and two angiogenetic peptides (SVV and QK) was investigated, immobilizing those peptides on the carboxylic group of HA previously deposited, using the well-known carbodiimide chemistry. The labeled version of each peptide was used to characterize the peptides’ immobilization and penetration into the polyelectrolytes layers, resulting in a successful grafting with complete penetration through the entire thickness of the LbL. In vitro tests were performed using HUVECs to assess their adhesion efficiency and their metabolic activity on the LbL with and without peptide immobilization, resulting in a preliminary improved activity when peptide-combinations is used. Finally, PC micro-channels (μCh) were first developed and characterized, and the rest of the experiments were performed on μCh of 25μm width, functionalized with (HA/CHI)12.5 architecture (PC-LbL) with RGD and QK peptides (PC-RGD+QK) or with RGD and SVV peptides (PC-RGD+SVV). Our first tubulogenesis experiment surprisingly showed the formation of tubular-like structures already after 2h of incubation using the double-peptides combination but only using PC-RGD+QK the tubes were present also after 3 and 4 hours of culture. The co-culture experiment with human pericytes derived from placenta (hPC-PL) demonstrates how the stabilization of the tubes was improved after 3 and 4 hours also for the PC-RGD+SVV sample. Globally our bio-functional material with PC-RGD+QK and PC-RGD+SVV peptides allow the formation of tubular-like structure in both mono and co-culture experiment
El, Bakali Abdelmagid. "Contribution à l’étude des échanges thermiques aux interfaces pour les procédés de formage à chaud : développement de moyens de mesure de l’émissivité et de la résistance thermique de contact (RTC) à haute température A fast and versatile method for spectral emissivity measurement at high temperatures". Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2020. http://www.theses.fr/2020EMAC0004.
Texto completoThe present work deals with the high temperature heat transfers involved in sheet/die contact within hot forming processes. The investigated heat ranges lie between 600°C and 1000°C while the study materials are namely TA6V and Inconel 625 (for the sheet) and AISI 310 stainless steel and refractory concrete (for the die). Under such industrial configuration, the heat transfers can be split in two steps: i) a gap closing phase during which the radiative property of the contact pair prevail and ii) a solid contact phase during which the conductive properties are involved and more precisely the thermal contact resistance (TCR). This twostep approach allows a separate investigation of both phenomena which are herein studied by the mean of two dedicated experimental means: a) The gap closing phase is studied through an emissivity measurement setup dedicated to high temperature. The chosen setup is inspired from elliptical oven setups. Its features include a heating rate over 11°C/s and a maximal in-service temperature of 1250°C. The related measurement instruments selection and design are also part of the presented work. The metrological aspects along with the uncertainty quantification are performed through the use of a reference material: pure platinum. This latter has proven worthy by its ability to sustain very high temperature while remaining free from oxidation. In addition, platinum’s optical properties are well documented throughout the scientific literature which provides solid comparisons with other published results. Finally, the construction of an emissivity database is presented for the two sheet materials of the study: TA6V and INCONEL 625. b) The solid contact phase is studied through a second tailor made experimental setup dedicated to TCR measurements. The proposed features include the ability to study metal contact pair (AISI 310 vs. TA6V/INCONEL 625) or ceramic vs. metal contact (Concrete vs. TA6V/INCONEL 625) for temperature as high as 800°C. The whole setup can be inserted within a classical tensile device in order to load the contact interfaces at stress levels similar to those involved in metal forming processes (here up to 4MPa). In practice, a circular sample cut from the studied sheet metals is clasped in between two cylindrical bars made of AISI 310 or concrete. The upper bar is then heated up by the mean of a resistive oven in order to generate a directional heat flux throughout the material interfaces. A suited measurement instrumentation then allows the assessment of the TRC for each contact pair for temperature ranging from 450°C to 800°C and pressure ranging from 0.1MPa to 4MPa. The results obtained from these two setups have built up a material database that was then use to simulate industrial hot forming operations. The process parameters retrieved from these simulation were used as input in an actual forming process and has led to the successful manufacturing of four parts all of which satisfying the quality requirements in term of geometry and microstructure
Sara, Hanna. "Analysis and valorization of new thermal management systems for a vehicle powertrain application". Thesis, Ecole centrale de Nantes, 2017. http://www.theses.fr/2017ECDN0019/document.
Texto completoThermal management proved itself in improving the fuel efficiency of the engine. Nowadays, automotive companies tend to apply different strategies to answer the greenhouse severe laws. The PhD aim is to valorize and analyze the different thermal management strategies with numerical simulations over different driving cycles and ambient conditions. A 1-D simulation code of the engine and its hydraulic circuits were built using GT-Suite. Four known driving cycles were chosen: NEDC, WLTC, AH and AU. In addition, an in-house developed driving cycle was introduced. An energy balance made over the different stages of the driving cycles underlines the importance of the heat storage and the exhaust heat recovery strategies.Heat recovery was applied over the coolant and the oil at ambient temperatures of -7°C and 20°C. Hot coolant storage and hot oil storage led to improve the coolant and lubricant initial temperatures respectively. Different configurations (total of 7) were proposed and studied. A multifunctional oil sump was introduced. Important fuel consumption savings were obtained. Exhaust heat recovery was then valorized. Heat exchanger was characterized over experimental setup then added to the engine model. Indirect and direct heating of the lubricant as well as both strategies back to back were tested. Remarkable friction reduction and fuel savings were obtained. Special configuration was proposed to control the lubricant high temperature instead of the bypass on the exhaust line. The study ended by valorizing minor strategies as the oil’s grade influence, the engine insulation, high temperature set point …
Perron, Jean. "Modélisation mathématique simplifiée d'un four de métal chaud". Thèse, 1987. http://constellation.uqac.ca/1713/1/1433477.pdf.
Texto completoHieu, Nguyen Minh y 阮明孝. "Investigating Drivers for Users’ Adoption of E-government Information Systems: An Empirical Study Based on a Service Portal in Lai Chau, Vietnam". Thesis, 2010. http://ndltd.ncl.edu.tw/handle/62462175287602330298.
Texto completo樹德科技大學
資訊管理系碩士班
99
Information and communication technology and the Internet have reshaped the mind and life of many people around the globe. By taking advantages of these technologies, governments around the world are introducing e-government services to better serve their citizens. One of the primary goals in building a Lai Chau e-government system is to provide online business registration services to the citizens and businesses of Lai Chau, Vietnam. This study is to examine factors influencing users’ adoption of the online business license service portal in Lai Chau. Based on literature review, we propose a research model founded on the well-known technology acceptance model (TAM). Our model theorizes that external variables including local government support, communication and service quality can affect users’ perceived ease of use and perceived usefulness in TAM. An empirical study was conducted to validate the proposed model. Questionnaires based on validated items from previous studies were distributed to several work places in Lau Chau. A total of 107 complete responses were collected for statistical analysis. Our results show that each hypothesis in the research model is supported with a high significance level. Managerial implications for the e-government service operators will be discussed.
LIN, TING-YU y 林庭玉. "Explore the Carbon Dioxide Sequestration and Maintenance Fee for Trees Specie in Urban Parks-A Case Study of Huei-Lai Park and Chau-Yang Eco-park". Thesis, 2017. http://ndltd.ncl.edu.tw/handle/58596620026622005906.
Texto completo逢甲大學
建築碩士學位學程
105
In recent years, there are so many ways proposed to reduce the concentration of Carbon Dioxide (CO2) as people were facing the challenge of global climate change. Carbon reduction and low carbon city are important issues for urban development and the research is of great worth. Kyoto Protocol Regulation reported “Forests play an important role in terms of absorbing Greenhouse Gas. The treaty allows that the car-bon dioxide absorption and emission together with forestation and deforestation since 1990, can be incorporated into net value of reduction”. Tree planting is definitely helpful the reduction of CO2 and the air pollution in the environment, in addition, keeping the ecological balanced, it is also an economical method to reduce carbon emissions. Purpose of tree planting is for the reduction CO2 concentrations in the atmos-phere, however, CO2 sequestration amounts has been an important reference data for greening. At present for many cases carbon sequestration were calculated on the bases of "Greenery Index" of Green Building, but it probably existed a large error when the carbon fixation data is used alone. In this study, we intended to involve three kinds of calculation tools for calculating CO2 sequestration amounts, "Building Greening Indi-cators", "Tree volume Calculation" and "Tree Carbon sequestration calculator by En-vironmental Protection Agency in Taiwan ", respectively, and to compare these data. The results showed that there was a large difference between the using of "Greenery Index" directly and the rest two, "Tree Carbon sequestration calculator" and "Tree volume Calculation". Trees CO2 sequestration amounts were varied depending on some factors such as the environment, tree's age, growth rate and tree’s characteristic. The essential condi-tion for a tree with high benefits (high CO2 sequestration amounts) is that trees must be healthily grown up in a well environment. In this study, instead of “Greenery In-dex”, we consider both "Tree volume Calculation" and "Tree Carbon sequestration calculator" to calculate the CO2 sequestration amounts. As well as to conduct struc-tured interviews with landscape maintenance experts to understand the needs of maintenance of urban park trees so as to figure out the tree species which have high CO2 sequestration amounts and low maintenance demands in urban parks. The results showed that the indigenous species Ficus microcarpa was highest-level CO2 seques-tration amounts, Ternstroemia gymnanthera was lowest; higher demands to maintain-ing management was Libocedrus formosana, Calophyllum inophyllum was lowest maintaining requirement. Exotic species with highest-level to CO2 sequestration amounts was Alstonia scholaris, lowest one was Ceiba speciosa; high demands on maintaining trees specie was Cassia fistula, Magnolia grandiflora was lowest main-taining requirements. In this study, we recommend to collect the CO2 sequestration amounts and the maintaining requirements of trees, in order to classify trees by CO2 sequestration ben-efit and maintaining requirement. Consequently, we can provide more classification options accordingly. Those information could be used on plant selection when the landscape greening design and practice. When doing planting design we recommend-ed to adopt multilayer planting strategies and to choose trees specie with both high-est-level of CO2 sequestration amounts and lowest maintaining requirements.
MENG-YU, KUO y 郭孟喻. "A Study of Tamsui's Landscape Paintingsafter Taiwan Restoration(1946-1995)-by Taking Taiwanese Painters Liao Chi-Chun, Chang Wan-Chuan,Tsai In-Tang, Liao Te-Cheng ,and Ho Chau-Chu for Examples". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/65773749386093466346.
Texto completo國立臺中教育大學
美術學系碩士班
98
Tamsui, having its own unique history, geographic and cultural contexts, was seen a scenic spot where had plentiful of rich drawing themes in the painters’ eye. After restoring, People have multiple explanations toward Taiwan landscape paintings no matter in the ways of cultural significance, styles, or characteristics. Therefore, this article hopes to compare the background, the styles, the materials, the painting techniques, and the painting theories of Liao Chi-Chun, Chang Wan- Chuan, Tsai In-Tang, Liao Te-Cheng, and Ho Chau-Chu by researching landscape paintings taking Tamsui as the theme. Meanwhile, preceding the discussion with theories as “art sociology”, “culture anthropology” and “iconology” and taking the paintings and the painters’ styles in the vein of social and cultural context into consideration to compare the special meaning of the five painters’ Tamsui art creation. This article not only investigates the reasons that made differences of the five painters’ styles, but also hopes to find a new orientation for the essence of art and historical value of Taiwan art- works after restoring. According to the analysis and generalization of this research refers to Liao Chi-Chun, Chang Wan- Chuan, Tsai In-Tang, Liao Te-Cheng,and Ho Chau-Chu’s Tamsui landscape paintings, the painters’ choices of themes about Tamsui, the display of drawing style and concepts have a great relevance with their personal learning experience and art thoughts. The Tamsui paintings recorded the changes of Taiwan landscape and also the painters’ style progress. However, observing the development of Taiwan landscape painting by researching the Tamsui subject is only a section; the researcher hopes that there will be more researchers involving in researching Taiwan landscape paintings to obtain more value and significance of the age.