Dissertations / Theses on the topic 'Control variables'
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Böhm, Walter, and Peter Hackl. "CUSUM Chart for Correlated Control Variables." Department of Statistics and Mathematics, WU Vienna University of Economics and Business, 1991. http://epub.wu.ac.at/76/1/document.pdf.
Full textSeries: Forschungsberichte / Institut für Statistik
Nandong, Jobrun. "Modelling and control strategies for extractive alcoholic fermentation: partial control approach." Thesis, Curtin University, 2010. http://hdl.handle.net/20.500.11937/2197.
Full textClerget, Charles-Henri. "Contributions au contrôle et à l'optimisation dynamique de systèmes à retards variables." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEM053/document.
Full textThis Ph.D. work studied the control and optimization of dynamical systems subject to varying time delays.State and control time delays are a well-known problem in control theory, with a potential to decrease performances during transient regimes, or even to jeopardize controllers closed-loop stability. Such variable delays play a key role in many applications in process industries.In a first part, we studied the closed-loop control of a system subject to varying and uncertain metrology delays. We established new results on robust stability under explicit conditions on the controller gain. In a second part, we tackled the problem of the dynamic optimization of systems exhibiting input dependent delays due to transport phenomena in complex hydraulic architectures. We designed an iterative optimization algorithm and guaranteed its convergence through a detailed analysis
Huang, Yi. "CONTROL OF METAL TRANSFER AT GIVEN ARC VARIABLES." UKnowledge, 2011. http://uknowledge.uky.edu/ece_etds/4.
Full textWise, Marshall Alan. "Simultaneous process control of several independent quality variables." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41532.
Full textMaster of Science
García, Bustos Sandra Lorena. "Control Multivariante Estadístico de Variables Discretas tipo Poisson." Doctoral thesis, Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/40592.
Full textGarcía Bustos, SL. (2014). Control Multivariante Estadístico de Variables Discretas tipo Poisson [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/40592
TESIS
Keating, Katrina Ann. "Noncognitive Variables for Placement| A Randomized Control Trial." Thesis, San Francisco State University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10822840.
Full textThis study was born out of a concern that U.S. community colleges were currently using or considering using noncognitive variables for academic placement without an understanding of how students would react to these scales in a high-stakes setting. While the use of noncognitive variables for placement often stems from a desire to overcome the myriad of limitations of content-based placement tests, the researcher was concerned that noncognitive variables had the potential to become an extension of the problems caused by the test.
This study was guided by two research questions: How does the high-stakes nature of academic placement impact student responses on noncognitive scales? How does the context, demand, characteristics, and framing of the noncognitive variables impact stereotype threat, if at all? The researcher performed a random control trial of incoming community college students to determine how they might react to questions about noncognitive variables. One group was told their responses would be used for placement, and the other was told that their responses would be used to improve instruction.
The major findings suggest that initial framing played a role in participant responses and lowered responses on some noncognitive variables, but that the act of having taken a placement test was also a moderator of student behavior and whether or not students believed the initial framing. Stereotype threat susceptibility appeared to have a statistically significant relationship with some participants’ responses on some noncognitive scales, and there was evidence that initial framing was not related. Finally, while participants were generally honest, those who did change their answers did so in a manner that was inconsistent, more so when given high stakes framing.
MARANHAO, PAULO HENRIQUE COELHO. "CONTROL CHARTS ON TRANSFORMED VARIABLES FOR MONITORING MULTIVARIATE PROCESS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2012. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=21881@1.
Full textA maioria dos trabalhos que propõem esquemas de Controle Estatístico de Processos Multivariados (CEPM) e que analisam o desempenho desses esquemas considera alterações nas variáveis observadas. Alguns autores mostraram que, quando alterações no vetor de médias de um processo multivariado ocorrem tipicamente em direções previsíveis, a estatística mais eficaz para o monitoramento do processo é o valor da projeção do vetor de observações (ou de sua média amostral) em cada uma dessas direções. Este trabalho propõe um método para o monitoramento de processos multivariados nos quais alterações nos parâmetros do processo são devidas a causas especiais que afetam variáveis não observáveis e ocorrem em direções conhecidas (ortogonais), e compara seu desempenho com o de gráficos de Shewhart nas variáveis observadas, nas componentes principais, e com o de gráficos de T2 no vetor de variáveis observadas. Além disso, é proposto um esquema complementar de monitoramento para detectar alterações em novas direções fora do hiperplano formado pelas direções conhecidas. Resultados obtidos por simulação mostram que o esquema proposto, de gráficos de controle em variáveis transformadas (projeções do vetor de variáveis observadas nas direções conhecidas), tem melhor desempenho na maior parte dos casos analisados. A análise de desempenho é feita supondo deslocamentos da média nas direções conhecidas (já que estes é que são as alterações conhecidas, ocasionadas pelas causas especiais) e/ou aumentos da variância nessas mesmas direções. A comparação é baseada nas probabilidades de alarme falso e de alarme verdadeiro.
Most of the works that propose schemes of Multivariate Statistical Process Control (MSPC) and that analyze the performance of these schemes consider changes in the observed variables. Previous authors have shown that when the shifts in the mean vector of a multivariate process typically occur in predictable directions, the most effective statistics for process monitoring are the values of the projections of the vector of observations (or of the sample average vector) in each of these directions. This paper proposes a method for the monitoring of multivariate processes in which changes in the process parameters are due to special causes that affect non-observable variables and occur in (orthogonal) known directions, and compares its performance with that of Shewharts charts on the observed variables, on the principal components, and with that of T2 charts on the vector of observed variables. In addition, it is proposed a supplementary scheme of monitoring to detect changes in new directions outside of the hyperplane formed by known directions. Results obtained by simulation show that the proposed scheme, consisting of control charts on the transformed variables (projections of the vector of observed variables on the known directions), has better performance in most of the cases analyzed. The analysis of performance is done assuming shifts in the mean of the known directions (since these are the known changes associated to special causes) and/or increases of the variance in these same directions. The comparisons are based on the in-control and out-of-control probabilities of signal.
Crisóstomo, Tiago Miguel Jacinto. "Firm performance and corporate governance variables - United Kingdom." Master's thesis, Instituto Superior de Economia e Gestão, 2013. http://hdl.handle.net/10400.5/11064.
Full textA temática do corporate governance remonta ao século XVIII. Apesar disso, só depois da crise financeira da década de 2000 que afectaram todo o sistema e das graves falências empresariais, o tema voltou à ribalta. Este estudo revisita de forma abrangente a evolução das várias teorias da empresa à luz do desenvolvimento do corporate governance como ciência fundamental para promover e desenvolver a performance no meio empresarial. Para tal, foi analisado o efeito que as variáveis de corporate governance têm na performance das empresas do Reino Unido no período de 2005-2012. Foram considerados cinco mecanismos de controlo empresarial: controlo efectuado aos directores, controlo através da estrutura accionista, controlo interno efectuado pelos "Committees", atribuição do cargo de CEO e Chairman a pessoas distintas e controlo através de remuneração baseada na performance. A estrutura accionista, aliada à atribuição do cargo de CEO e Chairman a pessoas distintas e o controlo através da remuneração baseada na performance, revelaram-se os mecanismos mais significativos na resolução da equação performance governance. Finalmente, e baseado na revisão de literatura e nos resultados obtidos, é possível afirmar que o corporate governance é um processo dinâmico no qual todos os intervenientes devem ser tidos em conta na prossecução do objectivo comum desenvolver um modelo de governance que seja sustentável e benéfico para a sociedade.
The theme of corporate governance dates back to the eighteenth century. Nevertheless, only after the financial crisis in 2000's decade that affected the entire system and the devastating corporate failures, the subject returned to the spotlight. This study revisits in a comprehensive way the evolution of the different theories of the firm in light of the development of corporate governance, as a fundamental science to promote and develop the corporate performance. To this purpose, we examined the effect that corporate governance variables have on the performance of companies in the UK for the period 2005-2012. We considered five mechanisms of corporate control: Board of directors, equity ownership structure, internal control performed by the Board Committees, separation of CEO and Chairman roles, and control through the variable remuneration. Board ownership, together with the separation of CEO and Chairman roles and control through the performance variable remuneration, proved to be the most significant mechanisms in the resolution of the equation performance - governance. Finally, and based on the literature review and the results obtained, it can be stated that corporate governance is a dynamic process in which the different stakeholders should be taken into account in order to achieve a common goal - develop a governance model that is sustainable and beneficial to society.
Hanson, Robert Alexander. "The application of a single control chart for dependent variables in multivariate quality control." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-05022009-040726/.
Full textSaona, Urmeneta Raimundo Julián. "Prophet inequality through schur-convexity and optimal control." Tesis, Universidad de Chile, 2019. http://repositorio.uchile.cl/handle/2250/168161.
Full textMemoria para optar al título de Ingeniero Civil Matemático
En el clásico problema de tiempo de parada óptimo conocido como Desigualdad del profeta realizaciones de variables positivas e independientes son descubiertas secuencialmente. Una jugadora que conoce las distribuciones, pero no puede ver en el futuro, debe decidir cuándo parar y tomar la última variable revelada. Su objetivo es maximizar la esperanza de lo obtenido y su rendimiento está dado por el peor caso del cociente entre la esperanza de que obtiene y la esperanza de lo que obtendría un profeta (que puede ver en el futuro y así siempre elegir el máximo). En los setenta, Krengel y Sucheston, y Garling, [16] determinaron que el rendimiento de una jugadora puede ser una constante y que 1/2 es la mejor constante. En la última década, la desigualdad del profeta ha resurgido como un problema importante dada su conexión con "Posted Price Mechanisms", una teoría usada en ventas en línea. Una variante de particular interés es "Prophet Secretary", donde la única diferencia es que las relaciones son descubiertas en orden aleatorio. Para esta variante, varios algoritmos logran un rendimiento de 1 − 1/e ≈ 0.63 y recientemente Azar et al. [2] mejoraron este resultado. En cuanto a cotas superiores, se sabe que una jugadora no puede hacerlo mejor que 0.745, en el límite sobre el tamaño de la instancia. En esta tesis se deriva una forma de analizar estrategias que dependen sólo del tiempo: dada una instancia, se calcula una secuencia decreciente de exigencias que son usadas para decidir si parar o no. La jugadora tomará el primer valor que supere la exigencia correspondiente al momento en que fue descubierta. Específicamente, se considera una clase robusta de estrategias que denominamos "blind strategies". Constituyen una generalización de fijar una sola exigencia para todo el proceso y consisten en fijar una función, independiente de la instancia, que determina cómo calcular las exigencias una vez la instancia es conocida. El resultado principal es que la jugadora logra un rendimiento de al menos 0.669, superando el estado del arte (Azar et al. [2]) tanto para "Prophet Secretary" como para la variante en la que la jugadora tiene la libertad de escoger el orden en que descubre las variables (Beyhaghi et al [3]). El análisis se reduce a estudiar la distribución del tiempo de parada inducido por estas estrategias, a través de la teoría de Schur-convexidad. También, se demuestra que este tipo de estrategias no pueden lograr más que 0.675, a través de calcular el rendimiento óptimo de la jugadora contra dos instancias particulares, resolviendo un problema de control óptimo. Finalmente, se demuestra que el conjunto más amplio de estrategias no adaptativas no pueden lograr más de √3 − 1 ≈ 0.73, cota que también mejora el estado del arte en cotas superiores para estrategias simples (Azar et al [2]). Se considera una estrategia como no adaptativa si al decisión de parar depende del valor, la identidad y el tiempo en que fue descubierta la variable, pero no toma en cuenta la identidad de las variables anteriores.
CONICYT-Chile, ECOS-CONICYT, Google y CMM - Conicyt PIA AFB170001
Henn, Santiago Martín. "Sistema de filtrado por electrocoagulación, control y monitoreo de variables." Bachelor's thesis, Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales, 2017. http://hdl.handle.net/11086/6259.
Full textDesarrolla un sistema que permita, a través del monitoreo y control de variables especificas (temperatura, presión, tensión, corriente y toma de imágenes por CCD) realizar el proceso de electromagnético de partículas de una solución, ademas debe recolectar los datos necesarios para validar un modelo matemático del mismo. Dicho sistema tendré como objetivo superar pruebas de laboratorio y de campo con la mayor efectividad posible
Bastidas, Valenzuela Silvia Cecilia. "Control de variables en la producción de chocolate fino enriquecido." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2017. https://hdl.handle.net/20.500.12672/6574.
Full textTesis
Abi, Assali López Wuendy Y. "Optimal selection of measurements and manipulated variables for production control." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8780.
Full textThesis research directed by: Dept. of Chemical and Biomolecular Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Nouasse, Houda. "Gestion supervisée de systèmes étendus à retards variables : cas des réseaux hydrographiques." Thesis, Toulouse, INPT, 2015. http://www.theses.fr/2015INPT0001/document.
Full textOn either side of the Earth, we observe more and more devastating natural phenomena. Amon these phenomena, floods are one of the most frequent and devastating natural disasters. During these last decades extensive flooding were caused by the flood of rivers. These floods due to excessive rainfall or runoff induce invariably the loss of human lives and material damages. To overcome these problems, water systems are increasingly equipped with means for detecting floods. A key factor in the management of such phenomena is responsiveness. Indeed, managers of river systems, faced to this kind of situation should quickly take important decisions in an uncertain context, as most of these floods are induced by abrupt climate events, whose magnitude is difficult to assess accuracy. We propose in this dissertation, a method of flood management in river systems equipped with flood zones controlled by gravitational gates. At first, we modeled our management method using a static transportation network. In a second step, we enriched it by using transportation networks with delays in order to take into account the travel time of the managed resource. The main difficulty of transportation networks with delays is their oversize. To overcome this problem, we developed an alternative mechanism combining a static reduced transportation network with a temporization matrix. Furthermore, this mechanism allows the consideration of variable time transfer depending on flows, without modification either on the transportation network, or on the structure of the temporization matrix. This mechanism allows simplified management of the transfer times, variable or not. With this mechanism, the evaluation of the minimum cost maximum flow allowed us, according to the management strategies considered, to compute the gate opening for floodplains in order to mitigate the flood but also to restore the water stored at the relevant time. Finally, to evaluate the contributions of this management, the method was applied to a case study based on a section of river equipped with three flood control reservoirs areas modeled using hydraulic simulators combining 1D and 2D models. The simulation results showed that the proposed approach allowed reducing significantly the floods downstream watercourses
Gillespie, Christopher R. "Psychological variables in the self-regulation of diabetes mellitus." Thesis, University of Sheffield, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310882.
Full textMcWilliams, Kyle Grant. "An analysis of variables affecting instructional efficiency." Thesis, University of Canterbury. School of Education, 2006. http://hdl.handle.net/10092/1046.
Full textPerrin, Christopher J. "FURTHER ANALYSIS OF VARIABLES THAT AFFECT SELF-CONTROL WITH AVERSIVE EVENTS." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1277816514.
Full textAnderson, Joseph C. "Walking to reach information variables and control strategies for nested actions /." [Bloomington, Ind.] : Indiana University, 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3344558.
Full textTitle from PDF t.p. (viewed on Oct. 7, 2009). Source: Dissertation Abstracts International, Volume: 70-02, Section: B, page: 1371. Adviser: Geoffrey P. Bingham.
Venigella, Pavan Kumar. "Robust Mechanism synthesis with random and interval variables." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.mst.edu/thesis/pdf/Venigella_09007dcc8046c1ff.pdf.
Full textVita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed March 27, 2008) Includes bibliographical references (p. 86-89).
Li, Bin. "Optimal control problems with constraints on the state and control and their applications." Thesis, Curtin University, 2011. http://hdl.handle.net/20.500.11937/2123.
Full textArroyo, Sáez José Nicolás. "Identificación de variables eléctricas de condición para el monitoreo de microcentrales." Tesis, Universidad de Chile, 2014. http://www.repositorio.uchile.cl/handle/2250/116968.
Full textEn el último tiempo el aumento de la demanda no ha ido de la mano con el crecimiento de la oferta, entre lo que sobresalen las barreras a la construcción de proyectos de gran envergadura. Sin embargo, Chile posee un enorme potencial energético, en especial, la energía hidráulica, la cual puede ser una alternativa para desarrollar proyectos de baja escala y responder al desafío de generación. El objetivo de esta memoria es desarrollar un sistema de monitoreo de variables eléctricas, que permita identificar condiciones anormales del funcionamiento de generadores sincrónicos, además disponer de una plataforma en tiempo real que pueda obtener los datos necesarios, para luego ser procesados e identificar posibles fallos. Para esto fue desarrollado un sistema en LABVIEW, el cual toma los datos, los procesa y los almacena, para posteriormente ser leídos en MATLAB y ser graficados y analizados. Este proceso se realizó con la micro central hidráulica ubicada en el taller mecánico de la Universidad de Chile, donde se tomaron distintas mediciones, que al ser analizadas mostraron diferentes condiciones del generador. Una de estas es la posible excentricidad estática del generador, debido a la alta presencia de armónicos que siguen el patrón f_E=[1±((2k-1)/P)] f_s. Otra de las condiciones encontradas, es la alta posibilidad de tener cortocircuitos en las fases A y B, debido a la presencia significativa de las 3ª, 9ª y 15ª armónicas en dichas fases. Además se presenta el diseño de un banco de pruebas, el cual está previsto para disponer de estados de comparación entre un generador en estado sano y en diferentes condiciones de falla. El sistema de adquisición de datos desarrollado presenta un buen desempeño almacenando datos en línea de la corriente de un generador. Con el cual se pueden realizar análisis del espectro de frecuencia, con el fin de encontrar patrones que permitan diferenciar las distintas fallas, puedan ser estas de índole mecánica o eléctrica. Asimismo, se desarrolla un manual para el posterior uso de la herramienta. Como trabajo futuro se propone integrar un sistema de detección de fallas, el cual pueda identificar en línea las diferentes condiciones que pongan en riesgo la operación de un generador.
Auyang, Arick Gin-Yu. "Robustness and hierarchical control of performance variables through coordination during human locomotion." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42837.
Full textAsakura, Koichi, Toyohide Watanabe, and Noboru Sugie. "An execution order control method of distributed processes for sharing global variables." IEEE, 1994. http://hdl.handle.net/2237/6927.
Full textAndary, Sally. "The relationship of locus of control and organisational variables to employee outcomes /." Adelaide, 1998. http://web4.library.adelaide.edu.au/theses/09ARPS/09arpsa5431.pdf.
Full textWood, Krista E. "Evolution of Scientific Reasoning in Control of Variables for Undergraduate Physics Lab." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447071195.
Full textSilva, Luciano Afonso. "Internal Variable and Temperature Modeling Behavior of Viscoelastic Structures -- A Control Analysis." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/28788.
Full textPh. D.
Boskov, Lazar. "One-sided screening procedure using multiple normally distributed variables." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06302009-040451/.
Full textLehman, Jeffrey S. "Sequential Design of Computer Experiments for Robust Parameter Design." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1027963706.
Full textOrozco, Becerra Jose Enrique. "Variables psicológicas predictoras del éxito profesional en microempresarios de Lima Metropolitana." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2018. http://tesis.pucp.edu.pe/repositorio/handle/123456789/13524.
Full textPeru is considered one of the most entrepreneurial countries of the world. The center of the entrepreneurship activity is the entrepreneur. The purpose of this research is to establish the relationship between psychological variables related to entrepreneurship and the perception of the entrepreneurial success, which is the career success. The participants of this study were microentrepreneurs from Lima Metropolitana. The results show that only Internal Locus of Control has a significant and positive relation with perceived entrepreneurial success. This could be due to the attribution that one is responsible for one's own actions Future research should be directed towards an exploratory level in order to determine the attitudes and motivations that relate with perception of business success of Peruvian entrepreneurs.
Tesis
Lilly, Mary Kristine M. S. "An Analysis of Adherence in Childhood Diabetes: Social Learning and Family Systems Variables." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30416.
Full textPh. D.
Mills, Timothy Ian Pandachuck. "Speech motor control variables in the production of voicing contrasts and emphatic accent." Thesis, University of Edinburgh, 2009. http://hdl.handle.net/1842/5815.
Full textBrender, Zoldan Andrés Yonathan. "Proyección de Tasa de Default para Instituciones Bancarias con Variables Macroeconómicas." Tesis, Universidad de Chile, 2010. http://www.repositorio.uchile.cl/handle/2250/103925.
Full textFihla, Priscilla Mandlakazi. "Relationships among Law School Experience and Selected Personality and cognitive Style Variables." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392220414.
Full textSipos, James Martin. "The relationship of the power motive and certain demographic variables to brokerage firm salespersons's sales success /." The Ohio State University, 1987. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487329662147396.
Full textZhang, Xi. "Physical and statistical analysis of functional process variables for process control in semiconductor manufacturing." [Tampa, Fla] : University of South Florida, 2009. http://purl.fcla.edu/usf/dc/et/SFE0003176.
Full textJaeckle, Christiane M. "Product and process improvement using latent variable methods." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0006/NQ42853.pdf.
Full textKuhn, Rachel. "Health Locus of Control in HIV: Healthy Individuals with Low CD4 Cells versus an HIV-positive Comparison Group." Scholarly Repository, 2008. http://scholarlyrepository.miami.edu/oa_theses/96.
Full textGilmore, Geoffrey Paul. "Identifying Quality Function Deployment's Variables, Outcomes, Their Relationships, and Guidelines for Practitioners in the American Automotive Industry." PDXScholar, 1992. https://pdxscholar.library.pdx.edu/open_access_etds/1157.
Full textMcGlone, John Francis. "Analyzing Tuberculosis Vulnerability and Variables in Tarrant County." Thesis, University of North Texas, 2016. https://digital.library.unt.edu/ark:/67531/metadc955077/.
Full textHandsel, Vanessa A. "Psychological variables in battered women's stay/leave decisions : risk-taking perceived control, and optimistic bias /." Electronic version (PDF), 2007. http://dl.uncw.edu/etd/2007-1/handselv/vanessahandsel.pdf.
Full textHöfler, Michael, Tanja Brueck, Roselind Lieb, and Hans-Ulrich Wittchen. "Calculating control variables with age at onset data to adjust for conditions prior to exposure." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-105363.
Full textHöfler, Michael, Tanja Brueck, Roselind Lieb, and Hans-Ulrich Wittchen. "Calculating control variables with age at onset data to adjust for conditions prior to exposure." Technische Universität Dresden, 2005. https://tud.qucosa.de/id/qucosa%3A26586.
Full textLaurí, Pla David. "MPC: Relevant Identification and Control in the Latent Variable Space." Doctoral thesis, Universitat Politècnica de València, 2012. http://hdl.handle.net/10251/15178.
Full textLaurí Pla, D. (2012). MPC: Relevant Identification and Control in the Latent Variable Space [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/15178
Palancia
Sadi, Ozlem. "Relation Of Cognitive And Motivational Variables With Students." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/2/12611727/index.pdf.
Full textrelevant prior knowledge, meaningful learning orientation, reasoning ability, self-efficacy, locus of control, attitudes toward biology and achievement in human circulatory system in learning cycle and traditional classrooms. This study was conducted with 2 teachers and 4 classes and total of 60 11th grade students in the private high schools at Ü
mitkö
y district of Ankara in the fall semester of 2008-2009 academic years. One class of each teacher was assigned as experimental group and treated with 5E learning cycle instruction and other class was assigned as control group and treated with traditional instruction. At the beginning of the study, both teachers were trained for how to implement 5E learning cycle instruction in the classrooms. The Human Circulatory System Achievement Test was applied twice as pre-test and after treatment period as a post-test to both experimental and control groups. Learning Approach Questionnaire was used to measure students&rsquo
approach to learning and Test of Logical Thinking was used to measure reasoning abilitiy of students. Students&rsquo
levels of self-efficacy, locus of control and their attitudes toward biology also were measured. The data obtained from the administration of post-test were analyzed by using ANOVA. The statistical result indicates that learning cycle instruction improved students&rsquo
achievement in human circulatory system compared to traditional instruction. Stepwise multiple regression analysis revealed that in learning cycle classrooms, the main predictors of achievement in human circulatory system were students&rsquo
reasoning ability (45.8%) and their prior knowledge (15.9%). In traditional classrooms, students&rsquo
meaningful learning orientation (40%) and locus of control (9.8%) were the main predictors of achievement. This study indicated that different variables may be significant for 11th grade students&rsquo
human circulatory system achievement in learning cycle and traditional classes.
Fuente, Flores David Marcial. "Desarrollo de herramientas de control para mejorar los niveles de recaudación de los ingresos propios en el HNRPP EsSalud-2017." Bachelor's thesis, Universidad Continental, 2018. http://repositorio.continental.edu.pe/handle/continental/4938.
Full textFen, Yun-Jr. "The design of a microcomputer based true basic statistical process control package for inspection by variables." Ohio University / OhioLINK, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1182435780.
Full textBeermann, Dennis [Verfasser]. "POD-based scalar and multiobjective optimal control of evolution equations including operator-valued variables / Dennis Beermann." Konstanz : KOPS Universität Konstanz, 2019. http://d-nb.info/1191099636/34.
Full textAmes, Ramírez Juan Carlos. "Control de variables en el espesador de cono profundo en la recuperación de relaves altamente fluibles." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2012. https://hdl.handle.net/20.500.12672/16231.
Full textDetermina la estructura de flóculo adecuada que permita la máxima claridad del líquido y máxima densidades en la descarga con el mínimo de dosificación que permita seleccionar las condiciones de alimentación para la operación del espesador piloto. Determinadas las condiciones de alimentación sigue una serie de ratios de tratamiento para determinar la máxima carga posible bajo condiciones óptimas de floculación en términos de TPD/m2. Durante estas series, se mantiene constante el nivel de sólidos y se monitorea la densidad del underflow manteniendo el balance alimentación descarga. La serie final de pruebas enfoca la maximización de la densidad en el underflow con diferentes tiempos de retención. Varios niveles de tratamiento y de altura de sólidos son mantenidos para determinar el requerimiento del tiempo de residencia de los sólidos y ratios de ascensión del overflow para un diseño industrial. El máximo ratio de tratamiento (TPD/m2), ratios de ascensión (m/h) y tiempo de retención, a una determinada densidad promedio, son usados para seleccionar el diámetro y la altura de las paredes del espesador. Muestras del rebose, descarga y alimentación fueron tomadas con la mayor frecuencia posible para determinar cualquier variación en las características de la alimentación que puedan afectar la floculación y en consecuencia la claridad del rebose y espesamiento. Típicamente, cambios en la distribución granulométrica, tipo de mineral, y pH tienen un gran impacto. Fue importante identificar las variaciones en las características de la alimentación que tienen efecto en la performance del espesador para asegurar una claridad en el rebose y densidad en la descarga del espesador compatibles con los requerimientos del proceso.
Vidal, Puig Santiago. "FAULT DIAGNOSIS TOOLS IN MULTIVARIATE STATISTICAL PROCESS AND QUALITY CONTROL." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/61292.
Full text[ES] La realización de un diagnóstico preciso de los fallos, tanto si se trata de fallos de sensores como si se trata de fallos de procesos, ha llegado a ser algo de vital importancia en la monitorización de procesos (reduce las paradas de planta, incrementa la seguridad de la operación en planta y reduce los costes de producción). Se requieren diagnósticos rápidos y correctos si se quiere poder recuperar los procesos o productos antes de que la seguridad o la calidad de los mismos se pueda ver comprometida. En el estudio de las diferentes metodologías para el diagnóstico de fallos esta tesis distingue dos escenarios diferentes, métodos para el control de estadístico multivariante de la calidad (MSQC) y métodos para el control estadístico de procesos basados en el uso de variables latentes (Lb-MSPC). En la primera parte de esta tesis se introduce el estado del arte sobre el diagnóstico e identificación de fallos (FDI). La segunda parte de la tesis está centrada en el estudio del diagnóstico de fallos en control estadístico multivariante de la calidad. Se describen los fundamentos de los métodos más extendidos para el diagnóstico en escenarios supervisados, sus requerimientos para su implementación sus puntos fuertes y débiles y sus posibles relaciones. Los resultados de diagnóstico de los métodos es comparado usando diferentes índices sobre los datos procedentes de dos procesos reales y de diferentes simulaciones. En la tesis se proponen nuevas variantes que tratan de mejorar los resultados obtenidos en MSQC. La tercera parte de la tesis está dedicada al diagnóstico de fallos en control estadístico multivariante de procesos basados en el uso de modelos de variables latentes (Lb-MSPC). Se describe los fundamentos de los métodos mas extendidos en el diagnóstico de fallos en Lb-MSPC supervisado y se introduce una de nuestras propuestas, el fingerprint contribution plot (FCP). Finalmente la tesis presenta y compara los resultados de diagnóstico de los métodos propuestos en Lb-MSPC. Los resultados son comparados sobre los datos de dos procesos usando una nueva estrategia basada en el uso de la sensitividad y especificidad promedia.
[CAT] La realització d'un diagnòstic precís de les fallades, tant si es tracta de fallades de sensors com si es tracta de fallades de processos, ha arribat a ser de vital importància en la monitorització de processos (reduïx les parades de planta, incrementa la seguretat de l'operació en planta i reduïx els costos de producció) . Es requerixen diagnòstics ràpids i correctes si es vol poder recuperar els processos o productes abans de que la seguretat o la qualitat dels mateixos es puga veure compromesa. En l'estudi de les diferents metodologies per al diagnòstic de fallades esta tesi distingix dos escenaris diferents, mètodes per al control estadístic multivariant de la qualitat (MSQC) i l mètodes per al control estadístic de processos basats en l'ús de variables latents (Lb-MSPC). En la primera part d'esta tesi s'introduïx l'estat de l'art sobre el diagnòstic i identificació de fallades (FDI). La segona part de la tesi està centrada en l'estudi del diagnòstic de fallades en control estadístic multivariant de la qualitat. Es descriuen els fonaments dels mètodes més estesos per al diagnòstic en escenaris supervisats, els seus requeriments per a la seua implementació els seus punts forts i febles i les seues possibles relacions. Els resultats de diagnòstic dels mètodes és comparat utilitzant diferents índexs sobre les dades procedents de dos processos reals i de diferents simulacions. En la tesi es proposen noves variants que tracten de millorar els resultats obtinguts en MSQC. La tercera part de la tesi està dedicada al diagnòstic de fallades en control estadístic multivariant de processos basat en l'ús de models de variables latents (Lb-MSPC). Es descriu els fonaments dels mètodes més estesos en el diagnòstic de fallades en MSPC supervisat i s'introdueix una nova proposta, el fingerprint contribution plot (FCP). Finalment la tesi presenta i compara els resultats de diagnòstic dels mètodes proposats en MSPC. Els resultats són comparats sobre les dades de dos processos utilitzant una nova estratègia basada en l'ús de la sensibilitat i especificitat mitjana.
Vidal Puig, S. (2016). FAULT DIAGNOSIS TOOLS IN MULTIVARIATE STATISTICAL PROCESS AND QUALITY CONTROL [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/61292
TESIS