Dissertationen zum Thema „POINTS OF PRODUCTION“
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Hsia, Jung-Sheng. „A new method for the automated production of digital terrain models using a combination of feature points, grid points and filling back points“. Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337379.
Der volle Inhalt der QuelleKrishnan, Shravan K. „Selection Of Inventory Control Points In Multi-Stage Pull Production Systems“. Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/193725.
Der volle Inhalt der QuelleMegaw, Amanda Margaret. „Detection of critical control points for foodborne pathogens within the poultry production and processing chain“. Thesis, Queen's University Belfast, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.324855.
Der volle Inhalt der QuelleBui, Thi Minh Phung. „La structuration sémantique des contenus des documents audiovisuels selon les points de vue de la production“. Phd thesis, Université Paris VIII Vincennes-Saint Denis, 2003. http://tel.archives-ouvertes.fr/tel-00259261.
Der volle Inhalt der QuelleRoussel, Morgan. „Normes et variations de la production lithique durant le Châtelperronien : la séquence de la Grande-Roche-de-la-Plématrie à Quinçay (Vienne)“. Thesis, Paris 10, 2011. http://www.theses.fr/2011PA100082.
Der volle Inhalt der QuelleNowadays, historical processes leading to the demise of Neanderthals are still poorly understood. Studying the lithic industry of the last Neanderthal populations provides insights into the technical traditions of these populations.Lithic technological analysis of three Châtelperronian layers, preserved in sequence at the cave of Quinçay, allowed us to determine the origin and the signification of Châtelperronian technical system changes over a long time period.The method for blade production is characteristic. It is a unipolar debitage of blades in sequence, which follows a two-step rhythm on an angular flaking surface. Bladelet production is quite frequent. Carried out on prismatic bladelet cores, the retreat of the flaking surface is oblique to the volume’s axis of symmetry. The goal of this bladelet production is similar to the one of the Protoaurignacian : to obtain blanks for large Dufour bladelets.At Quinçay, the coherence of the lithic technical system from one layer to another suggests little to no change through time. Thus, we can consider that there was no progressive evolution from the Châtelperronian to the Protoaurignacian. Nevertheless, we have to consider the possible influence of the Protoaurignacian on the Châtelperronian. These groups might have been in contact at places with a low degree of social intimacy such as pathways, where only end-products were visible. In that case, the idea of projectile and the concept of retouched bladelets would have diffused from one group to another
ABREU, ADRIANA RODRIGUES DE. „VOICES OF JUDGMENT AS POINTS OF ARGUMENT IN THE WRITTEN PRODUCTION OF HIGH SCHOOL STUDENTS: SOCIO-DISCURSIVE AND SOCIAL SEMIOTIC APPROACH“. PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2013. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=22078@1.
Der volle Inhalt der QuelleCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
FUNDAÇÃO DE APOIO À PESQUISA DO ESTADO DO RIO DE JANEIRO
PROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
O objetivo deste estudo é investigar como alunos do terceiro ano do Ensino Médio usam discursos avaliativos em seus textos, aqui nomeados como vozes de julgamento, a fim de produzirem textos dissertativo-argumentativos. Para alcançar tal objetivo, analisaremos como os elementos avaliativos de julgamento constroem pontos de argumentação e, consequentemente, o ponto de vista argumentativo, elementos identificados e caracterizados neste trabalho. A arquitetura teórica da pesquisa fundamenta-se na visão sociodiscursiva da linguagem, baseada nos estudos de Bakhtin (1990, 2003), que entende o discurso como construção social; na abordagem sociossemiótica proposta pela Linguística Sistêmico-Funcional (Halliday, 1978, 1994; Halliday e Hasan, 1989; Hasan, 1989), que volta-se para uma perspectiva semântica e funcional de linguagem e na Teoria da Avaliatividade (Martin e White, 2005; Martin, 2000a), que leva em conta os diferentes usos avaliativos da linguagem. Uma vez que a redação argumentativa é o objeto de análise desta pesquisa, este estudo também se fundamenta em estudos sobre gêneros (Halliday e Hasan, 1989; Martin, 1992, 2000b; Miller, 1994, Freedman, 1999; Bazerman, 2005 e Bakhtin, 2003) e teorias de argumentação (Breton, 2003). Sendo assim, caracterizaremos a redação escolar como um gênero discursivo, resultado de um processo social relevante para a inserção do aluno na sociedade; bem como entendemos a argumentação como atividade estruturante da linguagem. Fragmentos de doze redações produzidas por alunos de uma escola pública situada no município de São Gonçalo, no estado do Rio de Janeiro, foram investigados. A análise desenvolvida baseia-se na metodologia de pesquisa de natureza qualitativa e de cunho interpretativo (Denzin e Lincoln, 2006), em que investigamos o posicionamento dos alunos acerca da importância da escrita para a inclusão social, tendo em vista os discursos avaliativos que permeiam os textos. Os resultados indicam que as redações são compostas por enunciados carregados de crenças e estereótipos, sendo constituídas por diversos elementos avaliativos de comportamento humano. Além disso, foi possível perceber que muitos alunos se distanciam do gênero e da temática em questão, apontando para uma produção escrita aquém da esperada para o nível de escolaridade investigado. Em contraposição, os alunos frequentemente argumentam, mesmo que não seja na estrutura prototípica de uma redação dissertativo-argumentativa. Tais resultados levam à reflexão sobre a importância de se trabalhar com textos em sala de aula, apesar dos possíveis desafios.
The purpose of this study is to investigate how High School students use evaluative discourses in their written production, here named as voices of judgment, in order to produce argumentative texts. To reach this goal, we analyze how the evaluative elements of judgment construct points of argument, and therefore the argumentative point of view, elements identified and characterized in this work. The theoretical architecture built in this research is based on the socio-discursive approach to language (Bakhtin, 1990, 2003) that considers discourse as a social construct; the social semiotic perspective proposed by Systemic Functional Linguistics (Halliday, 1978, 1994; Halliday and Hasan, 1989; Hasan, 1989), which analyses language in a semantic and functional perspective, and the Appraisal Theory (Martin and White, 2005; Martin, 2000a), which takes into account different uses evaluative language. Since the object of analyses of this research is the argumentative written text, this study is also grounded on studies of genre (Halliday e Hasan, 1989; Martin, 1992, 2000b; Miller, 1994; Bakhtin, 2003) as well as on theories of argumentation (Breton, 2003). Hence, school essay is characterized as a discourse genre, being the result of a social process relevant to the inclusion of students in society, and arguments are seen as a structuring activity of language. Fragments of twelve essays produced by 12th grade students from a public school located in São Gonçalo, Rio de Janeiro, were investigated. The analysis follows a qualitative and interpretative methodology (Denzin and Lincoln, 2006), when stances of students on the importance of writing and its relevance for social inclusion were analyzed, considering the evaluative pieces of discourse that underlie their texts. Results indicate that the essays are composed of a great number of stereotypes and beliefs, being constituted by several evaluative elements of human behavior. Furthermore, it was observed that many students deviate from the required topic and text type, showing low proficiency in the written argumentative genre and indicating a mismatch between secondary school literacy demands and students written production. In contrast, students often use strategies of argumentation, even if not being in the structure of a prototypical written argumentative text. These results lead to a reflection on the importance of working with texts in the classroom, despite possible challenges.
Haouas, Nabiha. „Wind energy analysis and change point analysis“. Thesis, Clermont-Ferrand 2, 2015. http://www.theses.fr/2015CLF22554.
Der volle Inhalt der QuelleThe wind energy, one of the most competitive renewable energies, is considered as a solution which remedies the inconveniences of the fossil energy. For a better management and an exploitation of this energy, forecasts of its production turn out to be necessary. The methods of forecasts used in the literature allow only a forecast of the annual mean of this production. Certain recent works propose the use of the Central Limit Theorem (CLT), under not classic hypotheses, for the estimation of the mean annual production of the wind energy as well as its variance for a single turbine. We propose in this thesis, an extension of these works in a wind farm by relaxation of the hypothesis of stationarity the wind speed and the power production, supposing that the latter are seasonal. Under this hypothesis the quality of the annual forecast improves considerably. We also suggest planning the wind power production during four seasons of the year. The use of the fractal model, allows us to find a "natural" division of the series of the wind speed to refine the estimation of the wind production by detecting abrupt change points. Statistical tools of the change points detection and the estimation of fractal models are presented in the last two chapters
Demailly, Tulldahl Karine. „A Study and Analysis of Errors in the Written Production of Swedish Adolescent Learners of English : Comparing the Evolution of a Class at Two Different Points in Time“. Thesis, Linköping University, Department of Educational Science (IUV), 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-3367.
Der volle Inhalt der QuelleThe subject of this essay is a comparison of essays written by the same learners at two different points in time - i.e. while they were in the first and in the third grades of the Swedish secondary school. The essay includes a presentation of the raw data that have been used. The theoretical background is a general survey of some of the abundant literature relating to Second Language Acquisition and Error Analysis, and a large part of it deals with interlanguage theories. The analytical part of the work presents the results of the study, including a grammatical classification of the totality of the errors encountered as well as a presentation of the results for the whole of each class and for each individual learner. Finally, some of the theories are related to the results of the analysis and some conclusions are drawn. A part of the work consisted in the gathering of essays written by learners (exclusively with Swedish as their mother tongue) of the same class in a real school context, first to make a quantitative study of their errors, and second to make a comparison between their essays written at two different points in time. The aim was to find out if there had been an evolution, and to what extent the evolution had taken place. The hypothesis formulated at the beginning of this essay is that learners, in general, should make fewer errors after two years have passed. The results are that errors concerning Verbs (especially Concord), as well as miscellaneous spelling errors, were the most frequent ones, and this is true for both grades. As the total number of errors is lower for the third grade than for the first, and since the learners' production is larger in the third grade than in the first, the hypothesis can be considered to be true, though a larger study should be conducted to see if a general pattern can be found.
Diawara, Mamadou Oumar. „Impact de la variabilité climatique au nord Sahel (Gourma, Mali) sur la dynamique des ressources pastorales, conséquences sur les productions animales“. Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30029.
Der volle Inhalt der QuelleSeveral studies on the primary production of Sahelian rangelands that are dominated by annual herbaceous indicate large spatial heterogeneity and high inter-annual variations in production associated with changes in rainfall distribution mediated by run-off redistribution itself mostly bound to soil type. In Sahel, most of the forage production occurs during the rainy season, which lasts three to four months. The management of the stock of fodder which is the main nutrition resource for livestock during the long dry season requires a good knowledge of its seasonal dynamics under the combined effects of climate and grazing pressure. This thesis aims to study the impact of climate variability on the dynamics of the pastoral resources of the Gourma in the North-East of Malian Sahel and to assess the impact of resources variations on animal production. The approach used is based on a joint seasonal monitoring of vegetation and stocking rate. It combines an analytical study and the modeling of the dynamics of forage resources in response to rainfall distribution and stocking rate. The thesis is composed of four studies. The first is a sensitivity analysis of forage production to the intra-seasonal distribution of rainfall. The second study evaluates the impact of domestic ruminants grazing on standing straw and litter disappearance rates during the dry season. The third study addresses the same question by modeling the dynamics of fodder resources during the season depending on the livestock grazing pressure. The fourth and last study evaluates the breeding productivity of the herds and the sustainability of Gourma pastoralism. The results highlight the low productivity of pastoral breeding despite an overall under-utilization of the forage stock in the dry-season. They indicate that in the Sahelian pastoral systems with rangelands producing less than 2000 kg DM ha-1 on average, and very limited use of supplementary feeds in the late dry season, livestock suffer of nutritional stress in the late dry and early wet season, as revealed by residual masses of straws and litter tilling less than 10 % of rangeland yield at the end of the rainy season
Claude, Grégory. „Modélisation de documents et recherches de points communs : propositions d'un framework de gestion de fiches d'anomalie pour faciliter les maintenances corrective et préventive“. Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1575/.
Der volle Inhalt der QuelleThe daily practice of an activity generates a set of knowledge that results in a know-how, a mastery, a skill a person gains over time. In order to take advantage of this experience, capitalization of knowledge has become an essential activity for companies. Our research work aims to model and implement such a system that extracts and formalizes knowledge from defects that occur in the context of industrial production, and to integrate it into a framework in order to facilitate corrective and preventive maintenance. This framework organizes the knowledge in the form of defects' groups. These groups can be compared to patterns: they represent a problem to which one or more solutions are related. They are not defined a priori; the analysis of past defects generates relevant groups, which may change with the addition of new defects. To identify these patterns, a complete process of knowledge extraction and formalization is adopted, Knowledge Discovery in Databases, well known in the domain of knowledge management. This process has been applied in very diversified fields. In this work, we give a new dimension to this process, the processing of defects, especially those that occur during industrial production processes. The generic steps that compose it, from the simple data selection to the interpretation of patterns that support knowledge, are considered. A specific processing, relevant to our applicative context, is assigned to each of these steps
Caballero, Alma. „La France dans le théâtre de l'Amérique Latine : trois courants d'influence dans des points clefs de la géographie et de la culture de Notre Amérique“. Paris 8, 1994. http://www.theses.fr/1994PA080930.
Der volle Inhalt der QuelleThere is an undeniable french prescence in the theater of latin america : it can be appreciated through the writings about indigenous theater, and the tours around the continent made by the most celebrated french masters. This influence is also manifest in some historical motives of the evangelization theater, as well as in the french-writt en plays staged by latin-americans. Through the study of texts, reports and historical testimony, our work intends to seize the traces this exchange left in the formation of the public's taste, the conception of the mise en scene, and in the perspectives of a new creativity
Claude, Grégory. „Modélisation de documents et recherche de points communs - Proposition d'un framework de gestion de fiches d'anomalie pour faciliter les maintenances corrective et préventive“. Phd thesis, Université Paul Sabatier - Toulouse III, 2012. http://tel.archives-ouvertes.fr/tel-00701752.
Der volle Inhalt der QuelleRekik, Yosra. „Comprendre, modéliser et concevoir l’interaction gestuelle tactile“. Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10222/document.
Der volle Inhalt der QuelleThis thesis presents our research investigations on multi-touch gesture variability. We first study multi-touch gesture variability from a user perspective, and then we investigate applicable tools and techniques for multi-touch interaction.Towards understanding multi-touch variability, we set-up a pair of user studies. From the first study, we outline a tax-onomy of multi-touch gestures in which we present the different aspects of a single unified dynamic mechanism ruling users in the achievement of a multi-touch gesture. From the second study, we provide a more comprehensive analysis on multi-touch gesture variability. We differentiate between the major and minor sources of variation during gesture articulation and outline eight representative gesture classes. We analysis the link between gesture shape and gesture articulations. Moreover, we address the question of whether these different sources of variations induce different degree of articulation difficulty or if they are equivalent from a user-centric perspective. We there-by conduct the first investi-gation on the user-perceived difficulty of multi-touch gesture articulations. After studying multi-touch gestures from a purely user-centric perspective, we provide a set of tools: we first propose a new preprocessing step, Match-Up, that structures finger movements. We then apply Match-Up to recognize multi-touch input under unconstrained articulation (Match-Up & Conquer), for which we show an improvement in recogni-tion accuracy of up to 10%. Finally, we introduce the concept of rigid movement and investigate its potential usage in order to strength interaction and offer users more flexibility in articulating gestures
Agnew, Paul. „The production of point defects in solids by radiation“. Thesis, University of Oxford, 1991. https://ora.ox.ac.uk/objects/uuid:ae24c681-07eb-4b04-bb22-057b77db935e.
Der volle Inhalt der QuelleЖужгов, А. И., und A. I. Zhuzhgov. „Разработка web-приложения решения задачи оптимизации затрат на перевозку продукции : магистерская диссертация“. Master's thesis, б. и, 2021. http://hdl.handle.net/10995/99886.
Der volle Inhalt der QuelleThe object of the research is the process of transportation. The subject of the research is points of consumption and points of production, automation of the system for calculating the optimal cost of transportation. Assigned tasks: 1. Possibility of entering, adjusting and saving options for the calculation of optimization. 2. Displaying the calculation results in a graphical form on the user form. The purpose of this work is to create an information Web-application that will allow you to calculate the optimal cost of transportation of products, provide the user with the results of the calculation in a graphical form. The scientific novelty of the results obtained in the work lies in the application of a new method of effective organization and maintenance of specialized algorithmic and software solutions for the optimization of the cost of transportation of products, focused on improving the efficiency of management of cargo transportation processes using modern information processing methods: the use of flexible development methodology (Agile) and the Atlassian JIRA task tracker for project management, interaction with the customer during development, tracking errors, visual display of tasks and monitoring the process of their implementation; functional modeling of processes for the implementation of a web-application for solving the problem of optimizing the costs of transportation of products based on the IDEF0 methodology and Ramus Educational tools; using the method of collective ownership of the program code based on the service (remote repository) Atlassian Bitbucket. The practical significance of the results lies in the fact that the developed software will allow: to calculate the optimal cost of transportation for any number of points of production; for specialists of the transport and logistics operations department, to reduce the time for the formation of reporting documents, to reduce the time to search for the necessary actual reporting information due to the implementation of an ergonomic web interface; for specialists of the information systems support department, it provides conditions for reducing labor costs for maintaining, improving and developing the system, taking into account the wishes of users. The results of the work can also be used in the educational process for training bachelors and undergraduates in the direction "Information systems and technologies".
Wilson, Victoria R. „Point Pleasant Produced Water Characterization: An Analysis of Past Production and Prediction of Future Production“. Youngstown State University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=ysu155973360664964.
Der volle Inhalt der QuelleJouve, Romain. „Mise au point de synthèses de stéroïdes : perspectives d'applications industrielles“. Thesis, Université Clermont Auvergne (2017-2020), 2017. http://www.theses.fr/2017CLFAC016.
Der volle Inhalt der QuelleThe aim of this doctoral works is the reduction of the production costs of decortidiene made by SANOFI Vertolaye. Decortidiene is a key intermediate for the synthesis of several active principles. After checking the iterature, two ways were explored. The first one reduces by half the synthetic steps buthe yield is lower than the target. A molecular modeling allowed us to propose a reaction mechanism. Several optimizations and experimental design of experiments enabled the second studied pathway to reduce by 25% the industrial process and to reach the targeted yield
Hassanzadeh, Mostafai Pejman. „Rescheduling point determination in dynamic FMS using a flexibility metric methodology /“. View online ; access limited to URI, 2007. http://0-digitalcommons.uri.edu.helin.uri.edu/dissertations/AAI3298369.
Der volle Inhalt der QuelleGentilhomme, Théophile. „Intégration multi-échelles des données de réservoir et quantification des incertitudes“. Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0089/document.
Der volle Inhalt der QuelleIn this work, we propose to follow a multi-scale approach for spatial reservoir properties characterization using direct (well observations) and indirect (seismic and production history) data at different resolutions. Two decompositions are used to parameterize the problem: the wavelets and the Gaussian pyramids. Using these parameterizations, we show the advantages of the multi-scale approach with two uncertainty quantification problems based on minimization. The first one concerns the simulation of property fields from a multiple points geostatistics algorithm. It is shown that the multi-scale approach based on Gaussian pyramids improves the quality of the output realizations, the match of the conditioning data and the computational time compared to the standard approach. The second problem concerns the preservation of the prior models during the assimilation of the production history. In order to re-parameterize the problem, we develop a new 3D grid adaptive wavelet transform, which can be used on complex reservoir grids containing dead or zero volume cells. An ensemble-based optimization method is integrated in the multi-scale history matching approach, so that an estimation of the uncertainty is obtained at the end of the optimization. This method is applied on several application examples where we observe that the final realizations better preserve the spatial distribution of the prior models and are less noisy than the realizations updated using a standard approach, while matching the production data equally well
Newsome, Kirsty Jane. „Beyond the point of production : Just-In-Time, changing buyer-supplier relations and the labour implications for suppliers“. Thesis, University of Hertfordshire, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268073.
Der volle Inhalt der QuelleRosewell, Susan Tilden. „Examination of Narrative Point of View Through Production by Two Media“. Thesis, North Texas State University, 1986. https://digital.library.unt.edu/ark:/67531/metadc500621/.
Der volle Inhalt der QuelleWilson, Amanda J., und n/a. „Stone tool production at Cat's Eye Point, Kakanui, North Otago, New Zealand“. University of Otago. Department of Anthropology, 1999. http://adt.otago.ac.nz./public/adt-NZDU20070523.143909.
Der volle Inhalt der QuelleŽmolík, Václav. „Energetická bilance bioteplárny“. Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228660.
Der volle Inhalt der QuelleGinsburger, Emmanuel. „Définition et mise au point d'une méthodologie pour l'extrapolation de procédés de copolymérisation en émulsion“. Vandoeuvre-les-Nancy, INPL, 2001. http://www.theses.fr/2001INPL045N.
Der volle Inhalt der QuelleThe aim of this work is the definition and the improvement of a method for the industrial scale up of emulsion polymerization. These materials are prepared by a semi-batch process in different stages in order to obtain a Core/Shell morphology. According to the process parameters used, the obtained products can reach different end-use properties. After a detailed review of the literature available on emulsion polymerization mechanisms and polymer behavior in paint formulation, the first part of the work deals with the kinetic study of two semi-batch industrial polymerizations and the analysis of the influence of the main process key parameters (reaction temperature and feedings rate) on the end use properties of the latex. The second part is dedicated to the development of an industrial recipe. First, a chemical formulation and a type of process are chosen. Then, the concemed process is modeled. The model predicts satisfactorily conversion, average molecular weights, particles sizes and concentrations as a function of operating conditions (emulsifier, initiator and monomer concentrations). Key parameters of the model are identified on the basis of batch experimental data in order to describe the overall kinetic sketch of emulsion polymerization. The model is then used as a simulator and is integrated in a multicriteria optimization procedure in order to master the quality of the product. The decision aid problem consists in obtaining the best tradeoff as possible from ali fixed objectives. The multicriteria optimization technique is elaborated from a haploid genetic algorithm. In fact, the final results will be a multivariable trajectory, optimized in a multicriteria sense, which will be later used for the predictive control of the process
Pitarch, i. Mocholí Miquel. „High capacity heat pump development for sanitary hot water production“. Doctoral thesis, Universitat Politècnica de València, 2017. http://hdl.handle.net/10251/81858.
Der volle Inhalt der QuelleLas bombas de calor han sido identificadas como una alternativa eficaz a las calderas tradicionales para la producción de agua caliente sanitaria (ACS). El elevado salto de temperatura del agua que normalmente tiene lugar en esta aplicación (por lo general de 10ºC a 60ºC) ha condicionado el tipo de soluciones que se utilizan. Por un lado, los ciclos transcríticos han sido considerados como una de las mejores soluciones para trabajar con los elevados saltos de temperatura del agua. Sin embargo, el rendimiento de la bomba de calor transcrítica con CO2 es bastante dependiente de la temperatura de entrada del agua, que en muchos casos está por encima de los 10¿C. Además, el rendimiento depende en gran medida de la presión de descarga, la cual necesita ser controlada con el fin de trabajar en el punto óptimo en cualquier condición externa. Por otra parte, para los sistemas subcríticos, el subenfriamiento parece ser crítico para el buen funcionamiento de la bomba de calor cuando se trabaja con elevados saltos de temperatura del agua, pero no hay ningún trabajo publicado en el que optimicen el subenfriamiento para la aplicación de ACS en estos sistemas. Por lo tanto, los sistemas subcríticos requieren de un estudio sistemático para buscar el subcooling óptimo y maximizar el COP en función de las condiciones externas, de la misma forma que se ha hecho para la presión de descarga en los ciclos transcríticos. El objetivo de esta tesis es investigar el papel del subenfriamiento en el rendimiento de una bomba de calor trabajando con Propano para la producción de ACS, en la aplicación de recuperación de calor de cualquier fuente de agua (agua- agua). Dos enfoques diferentes para superar el alto grado de subenfriamiento fueron diseñados y construidos para ponerlos a prueba en el laboratorio: 1) El subenfriamiento se hace en el condensador: La carga activa de refrigerante del sistema se controla con una válvula de estrangulación. De esta manera, el subenfriamiento puede ser controlado de forma independiente a cualquier condición externa. 2) El subenfriamiento se hace en un intercambiador de calor separado, el subenfriadador. El subenfriamiento no se controla, este depende de la condición externa y de la transferencia de calor en el subenfriadador. Las bombas de calor se ensayaron a diferentes temperaturas del agua a la entrada del evaporador (10ºC a 35ºC) y entrada del condensador (10ºC a 55ºC), mientras que la temperatura de producción de agua, normalmente, se fija a 60¿C. Los resultados obtenidos han demostrado que el COP depende mucho del subenfriamiento. En las condiciones nominales (20ºC/15ºC para la temperatura del agua de entrada/salida en el evaporador y 10ºC/60ºC para la temperatura del agua de entrada/salida en el condensador), el subenfriamiento óptimo fue aproximadamente de 43 K con un COP de calentamiento de 5,61, que es alrededor del 31% más alto que el mismo ciclo trabajando sin subenfriamiento. Además, el sistema con subenfriamiento ha probado de forma experimental, que es capaz de producir agua hasta los 90ºC, y ha mostrado un COP más alto que algunos productos comerciales que trabajan con CO2 (datos de referencia del catálogo).
Les bombes de calor han estat identificades com una alternativa eficaç a les calderes tradicionals per a la producció d'aigua calenta sanitària (ACS). L'elevat salt de temperatura de l'aigua que normalment té lloc en aquesta aplicació (en general de 10ºC a 60ºC) ha condicionat el tipus de solucions que s'utilitzen. Per una banda, els cicles transcrítics s'han considerat com una de les millors solucions per tal de treballar amb els elevats salts de temperatura de l'aigua. No obstant això, el rendiment de la bomba de calor transcrítica amb CO2 és bastant dependent de la temperatura d'entrada de l'aigua, que en molts casos està per damunt de 10¿C. A més, el rendiment depèn en gran mesura de la pressió de descarrega, la qual necessita ser controlada per tal de treballar en el punt òptim a qualsevol condició externa. Per altra banda, per als sistemes subcrítics, el sub-refredament sembla ser crític per al funcionament de la bomba de calor quan es treballa amb elevats salts de temperatura de l'aigua, però no hi ha cap treball publicat en el qual optimitzen el sub-refredament per a l'aplicació d'ACS en aquests sistemes. Per tant, els sistemes subcrítics requereixen d'un estudi sistemàtic per tal de buscar el subcooling òptim i maximitzar el COP en funció de les condicions externes, en la mateixa forma que s'ha fet per la pressió de descarrega en els cicles transcrítics. L'objectiu d'aquesta tesi és investigar el paper del sub-refredament en el rendiment d'una bomba de calor treballant amb Propà per a la producció d'ACS, en l'aplicació de recuperació de calor de qualsevol font d'aigua (aigua-aigua). Dos enfocaments diferents per tal de superar l'alt grau de sub-refredament van ser dissenyats i construïts per posar-los a prova en el laboratori: 1) El sub-refredament es fa en el condensador: La càrrega activa de refrigerant del sistema es controla amb una vàlvula d'estrangulació. D'aquesta manera, el sub-refredament pot ser controlat de forma independent en qualsevol condició externa. 2) El sub-refredament es fa en un intercanviador de calor separat, el sub-refredador. El sub-refredament no es controla, este depèn de la condició externa i de la transferència de calor al sub-refredador. Les bombes de calor es van assajar a diferents temperatures de l'aigua a l'entrada de l'evaporador (10ºC a 35ºC) i a l'entrada del condensador (10ºC a 55ºC), mentre que la temperatura de producció d'aigua, normalment, es fixa a 60¿C. Els resultats obtinguts han demostrat que el COP depèn molt del sub-refredament. En les condicions nominals (20ºC/15ºC per a la temperatura de l'aigua d'entrada/eixida a l'evaporador i 10ºC/60ºC per a la temperatura de l'aigua d'entrada/eixida en el condensador), el sub-refredament òptim és aproximadament de 43 K amb un COP d'escalfament de 5,61, que és al voltant del 31% més alt que el mateix cicle treballant sense sub-refredament. A més, el sistema amb sub-refredament ha provat de forma experimental, que és capaç de produir aigua fins als 90ºC, i ha mostrat un COP més alt que alguns productes comercials que treballen amb CO2 (dades de referència del catàleg).
Pitarch I Mocholí, M. (2017). High capacity heat pump development for sanitary hot water production [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/81858
TESIS
Firincioglu, Tuba. „Bubble point suppression in unconventional liquids rich reservoirs and its impact on oil production“. Thesis, Colorado School of Mines, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=3558341.
Der volle Inhalt der QuelleThe average pore size in producing unconventional, liquids-rich reservoirs is estimated to be less than 100 nm. At this nano-pore scale, capillary and surface disjoining force interactions, such as van der Waals, structural, and adsorption, affect the phase behavior that is not considered to be significantly, different than in conventional reservoirs. In this dissertation, a comprehensive discussion of the thermodynamics required to model phase behavior of unconventional, liquids-rich reservoirs is presented. Three oil compositions from different unconventional reservoirs are used to generate results.
The impact of confinement manifests itself in the form of reduction of the liquid pressure at which the first gas bubble forms when compared to the bulk fluid measurements in PVT cells. It is shown that the suppression of the bubble-point pressure impacts the saturated portion of the liquid formation volume factor and extends the undersaturated portion of the curve. The equilibrium gas composition is different for each supersaturation level and the gas is composed of lighter components as the supersaturation, i.e., the bubble-point suppression, increases. The minimum radius of the pore that is required to form a specified size bubble is also investigated and the range of pore sizes required under different assumptions is reported.
The impact of this phase behavior deviation on the flow of confined fluids is investigated using a black-oil simulator, COZSim, which evaluates gas and oil fluid properties at corresponding phase pressures. The simulator was independently developed in a DOE project with the capability to incorporate the findings of this research. The results of the analysis show that there is a difference in gas production and gas saturation distribution in the reservoir with and without the confinement impact on the PVT properties. The produced GOR is lower when the confinement is considered due to the bubble-point suppression. These results indicate that the use of bulk fluid measurements in modeling and predicting the performances of nano-porous unconventional reservoirs may result in significant underestimation of the reservoir potential.
Malatji, Kgashane Philip. „Development of mean concentration stimulation point for fermented Lantana Camara Phytonematicide on tomato production“. Thesis, University of Limpopo, 2017. http://hdl.handle.net/10386/1918.
Der volle Inhalt der QuelleRoot-knot nematodes (Meloidogyne species) are the major soil-borne pests of tomato (Solanum lycorpesicum) plants. Due to the global withdrawal of effective chemical nematicides from the agrochemical markets, nematodes are difficult to control under the production systems. Currently, botanicals are being researched and developed as alternative to chemical nematicides with promising results, although they have challenge of phytotoxicity. The objective of this study was to determine the Mean Concentration Stimulation Point (MCSP) of Tickberry (Lantana camara) extracts for tomato plant-infected with M. javanica. Treatments consisted of six levels of L. camara extracts, namely, 0, 2, 4, 6, 8 and 10% per pot, which were arranged in a randomised complete block design, with ten replicates. Tomato seedlings were inoculated with 2500 second-stage juveniles (J2S) of M. javanica at five days after transplanting, with treatments applied at seven days after inoculation. At 56 days after inoculation, L. camara extracts had positive effects on plant height, stem diameter, number of leaves, number of fruits and fruit mass, contributing 65, 74, 61, 25 and 61% in total treatment variation (TTV), respectively, under greenhouse conditions. Under microplot conditions, treatments contributed 55, 85, 61, 36 and 85% in TTV of the respective plant variables. Under greenhouse it contributed 60, 35 and 77% and 29, 79 and 70% under microplot on dry shoot mass, dry root mass and galling index respectively. Treatments did not have any effects on soil pH and electrical conductivity (EC). Under greenhouse conditions, treatments contributed 88, 94 and 92% in TTV of nematode in roots, soil and final population, respectively, whereas under microplot conditions 94, 97 and 95% in xvii TTV of the respective nematode stages. The derived mean concentration of L. camara extracts for tomato was 5.76 and 5.31% under microplot and greenhouse conditions, respectively. The overall sensitivity of tomato plants to L. camara extracts under microplot and greenhouse were 3 and 0, respectively. In conclusion Meloidogyne species can be managed using L. camara extracts 5.31 and 5.76% under glasshouse production and field production system respectively.
Hong, Yue. „Numerical Modelling and Mechanical Studies on a Point Absorber Type Wave Energy Converter“. Doctoral thesis, Uppsala universitet, Elektricitetslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-305650.
Der volle Inhalt der QuelleBornschlegell, Augusto Salomao. „Optimisation aérothermique d'un alternateur à pôles saillants pour la production d'énergie électrique décentralisée“. Thesis, Valenciennes, 2012. http://www.theses.fr/2012VALE0023/document.
Der volle Inhalt der QuelleThis work relates the thermal optimization of an electrical machine. The lumped method is used to simulate the temperature field. This model solves the heat equation in three dimensions, in cylindrical coordinates and in transient or steady state. We consider two transport mechanisms: conduction and convection. The evaluation of this model is performed by means of 13 design variables that correspond to the main flow rates of the equipment. We analyse the machine cooling performance by varying these 13 flow rates. Before starting the study of such a complicated geometry, we picked a simpler case in order to better understand the variety of the available optimization tools. The experience obtained in the simpler case is applyed in the resolution of the thermal optimization problem of the electrical machine. This machine is evaluated from the thermal point of view by combining two criteria : the maximum and the mean temperature. Constraints are used to keep the problem consistent. We solved the problem using the gradient based methods (Active-set and Interior-Point) and the Genetic Algorithms
Silvaggio, Anthony Vincent. „The forest defense movement, 1980-2005 : resistance at the point of extraction, consumption, and production /“. view abstract or download file of text, 2005. http://wwwlib.umi.com/cr/uoregon/fullcit?p3190548.
Der volle Inhalt der QuelleTypescript. Includes vita and abstract. Includes bibliographical references (leaves 290-302). Also available for download via the World Wide Web; free to University of Oregon users.
Shekeris, Haris. „The production and dissemination of scientific knowledge from the point of view of communitarian epistemology“. Thesis, University of Bristol, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.627923.
Der volle Inhalt der QuelleChavez, Baroni Ricardo. „Mise au point d'outils pour le contrôle du tir à l'explosif sous contraintes de production“. Paris, ENMP, 1996. http://www.theses.fr/1996ENMP0001.
Der volle Inhalt der QuelleIralde, Benoist Lydie. „Point de vue et perspective dans la compréhension des textes et la production de récits“. Angers, 1994. http://www.theses.fr/1994ANGE0016.
Der volle Inhalt der QuelleSrivastava, Prashant. „Value stream mapping on foam injection moulding process-- the starting point of a six sigma project“. Menomonie, WI : University of Wisconsin--Stout, 2005. http://www.uwstout.edu/lib/thesis/2005/2005srivastavap.pdf.
Der volle Inhalt der QuelleGuéronnet, Jane. „Place du poste d'observation dans la mise en scène du film documentaire“. Paris 10, 1985. http://www.theses.fr/1985PA100127.
Der volle Inhalt der QuelleYuvaraj, Vasanth Raj, und Sifei Zhang. „Reducing WIP Inventory of Production Line in AQ Segerström & Svensson AB“. Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-19202.
Der volle Inhalt der QuelleShen, Chen. „Towards a comprehensive understanding of the lithic production system of the Princess Point Complex, southwestern Ontario“. Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0017/NQ28057.pdf.
Der volle Inhalt der QuelleMorra, Christophe. „Mise au point d'un procédé de production d'une biomasse de Acidithiobacillus ferrooxidans par voie bio-électrochimique“. Grenoble INPG, 2003. http://www.theses.fr/2003INPG0057.
Der volle Inhalt der QuelleBonasso, Nathalie. „Mise au point d'un procédé d'élaboration de films minces quasicristallins Al62 CU25,5 Fe12,5 : cinétique des changements de phases du mélange métallique amorphe“. Vandoeuvre-les-Nancy, INPL, 2002. http://www.theses.fr/2002INPL107N.
Der volle Inhalt der QuelleBellanger, Laurent. „Production d'anticorps monoclonaux in vitro, mise au point d'un milieu de culture synthetique et selection d'un procede“. Clermont-Ferrand 2, 1989. http://www.theses.fr/1989CLF21161.
Der volle Inhalt der QuelleBronschlegell, Augusto. „Optimisation aérothermique d'un alternateur à pôles saillants pour la production d'énergie électrique décentralisée“. Phd thesis, Université de Valenciennes et du Hainaut-Cambresis, 2012. http://tel.archives-ouvertes.fr/tel-00768249.
Der volle Inhalt der QuelleZouheiry, Hassane. „La pénicilline amidase d'Escherichia coli : recherche des meilleurs conditions de production par bactéries recombinées, mise au point de production et de caractérisation de mutants, étude de ces mutants“. Nancy 1, 1991. http://www.theses.fr/1991NAN10021.
Der volle Inhalt der QuelleCosson, Marjorie. „Stabilité du réseau électrique de distribution. Analyse du point de vue automatique d'un système complexe“. Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLC065/document.
Der volle Inhalt der QuelleTo maintain the voltage within specified limits, local control laws of distributed generators (DGs) reactive power (Q) with respect to their voltage (U) have been considered. This work studies the impact of Q(U) control laws on distribution feeders’voltage stability. An empirical study confirms the risk of voltage instability and highlights its dependence on control law parameters. To help distribution grid operators to choose these parameters, three methods assessing stability are formulated.First, a formal method based on discrete abstraction and bisimulation calculation is developed. The proposed approach yields precise results but with a high computational load. Then, to overcome this issue, an analytical criterion adapting Q(U) control laws response time with respect to grid parameters is formulated. Finally, a general criterion, valid in any cases, is established in order to be included in the grid codes. To conclude this work, extension to more complex cases is discussed
Hu, Qiaohai (Joice). „Essays on Supply Chain Competition and Coordination of Operations with Finance“. Case Western Reserve University School of Graduate Studies / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=case1123531538.
Der volle Inhalt der QuelleHattami, Imane. „La transposition d'échelle : stratégie et optimisation pendant le développement et lors du transfert en production“. Bordeaux 2, 2001. http://www.theses.fr/2001BOR2P008.
Der volle Inhalt der QuelleGalland, Sophie. „Elaboration de matrices granulaires par une approche couplée produit / procédé : application au développement de sphéroïdes médicamenteux par extrusion / sphéronisation“. Montpellier 1, 2005. http://www.theses.fr/2005MON13511.
Der volle Inhalt der QuelleCooling, Christopher. „Development of a point kinetics model with thermal hydraulic feedback of an aqueous homogeneous reactor for medical isotope production“. Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24969.
Der volle Inhalt der QuelleMilrud, Eduardo E. „The Practice of Design in Multidisciplinary Teams: Turning Points, Mediation, and Getting Stuck“. Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1608207778820736.
Der volle Inhalt der QuelleCans, Pierre. „Contribution à l'identification des dynamiques de production des pristinamycines et à la mise au point de nouvelles procédures de fabrication“. Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37603596b.
Der volle Inhalt der QuelleCans, Pierre. „Contribution a l'identification des dynamiques de production des pristinamycines et a la mise au point de nouvelles procedures de fabrication“. Toulouse, INSA, 1987. http://www.theses.fr/1987ISAT0019.
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