Дисертації з теми "Reentrancy"
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Mazza, Marco G., Manuel Greschek, Rustem Valiullin, Jörg Kärger, and Martin Schoen. "Dynamics in reentrant nematics." Diffusion fundamentals 16 (2011) 53, S. 1-2, 2011. https://ul.qucosa.de/id/qucosa%3A13796.
Повний текст джерелаMazza, Marco G., Manuel Greschek, Rustem Valiullin, Jörg Kärger, and Martin Schoen. "Dynamics in reentrant nematics." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-185394.
Повний текст джерелаBáring, Luís Augusto Gomes 1983. "Supercondutividade em semimetais e isolantes topológicos." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/277009.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Instituto de Física Gleb Wataghin
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Resumo: No presente trabalho estudamos os semimetais bismuto Bi, antimônio Sb e Bi1-xSbx, materiais com propriedades topologicamente não triviais. Observamos a ocorrência de supercondutividade intrínseca em bismuto com TC »= 8:5K. Construímos, a partir dos dados de magnetização e resistência, o diagrama de fase do campo crítico H versus a temperatura T. Esse diagrama de fase, pode ser ajustado segundo modelos da literatura válidos para supercondutividade granular. Detectamos, no bismuto, o aumento da corrente Josephson e acoplamento intergranular no limite quântico devidos à quantização de Landau. Isso se manifesta como uma supercondutividade reentrante. Foi também encontrada transição tipo metal-isolante induzida por campo magnético em todos os materiais estudados. O diagrama de fase H versus T mostra uma extraordinária semelhança entre os três materiais. A amostra Bi1-xSbx, com x = 0:052, revelou a ocorrência de transição semimetal-isolante topológico já em campo magnético zero. Fizemos uma comparação com resultados anteriores da literatura, analisando a dependência da temperatura em que ocorre essa transição em relação à concentração de antimônio x e ao campo magnético B e demonstramos a similaridade entre eles. Observamos, também, supercondutividade nos semimetais bismuto, antimônio e no Bi1-xSbx, induzida por dopagem com os metais ouro e índio, e mostramos que a supercondutividade está associada à interface entre os metais e os semimetais. Finalmente, encontramos a indução de supercondutividade mediante a aplicação de campo magnético em bismuto, consistente com a ocorrência de férmions de Majorana na interface entre esse material e a tinta prata usada para os contatos. Tal observação pode ser devida, também, à ocorrência de um estado supercondutor fora do equilíbrio.
Abstract: In this work we studied the semimetals bismuth Bi, antimony Sb and Bi1-xSbx, all of them with non-trivial topologic properties. We observed an intrinsic superconductivity in bismuth, with TC »= 8:5 K. The phasediagram of the critical field H versus the temperature T, based upon the magnetization and resistance data, may be well fitted according to theoretical models valid for granular superconductivity. We also detected, in bismuth, the increase of the Josephson current and interganular coupling in the quantum limit due to Landau quantization. This manifests itself as a reentrant superconducting state. Our results revealed a metal-insulator transition triggered by magnetic field, for all the studied materials. The phase diagram H ¡T shows a striking similarity between them. The sample Bi1-xSbx with x = 0:052 demonstrated a semimetal-insulator transition even at zero field. We compared our results with previous results of other groups and analyzed the temperature dependence of the transition as a function of the antimony amount x and the magnetic field B and demonstrated their similarity. We also observed supeerconductivity in the semimetals bismuth, antimony and Bi1-xSbx, triggered by doping with the metals gold and indium, and showed that the superconductivity is associated to the interface between the metals and the semimetals. Finally, we found the superconductivity induced by the aplication of magnetic field in bismuth, consistent with the Majorana fermions present in the interface between this material and the silver paste contacts. This may also be related to a non-equilibrium superconduting state.
Doutorado
Física
Doutor em Ciências
Courtemanche, Marc. "Reentrant waves in excitable media." Diss., The University of Arizona, 1993. http://hdl.handle.net/10150/186311.
Повний текст джерелаNakagawa, Harumichi, Masatoshi Yamazaki, Motoki Nihei, Ryoko Niwa, Tatsuhiko Arafune, Akira Mishima, Shiho Nashimoto, et al. "Virtual Electrode Polarization-Induced Reentrant Activity." Research Institute of Environmental Medicine, Nagoya University, 2003. http://hdl.handle.net/2237/7595.
Повний текст джерелаLammers, Willem Jacob Edoardo Petrus. "Inhomogeneity in conduction and reentrant arrhythmias." Maastricht : Maastricht : Rijksuniversiteit Limburg ; University Library, Maastricht University [Host], 1987. http://arno.unimaas.nl/show.cgi?fid=5370.
Повний текст джерелаCabrera, Hormazabal Carlos Sebastián. "Control de Reentrancia de Aspectos en AspectJ." Tesis, Universidad de Chile, 2010. http://repositorio.uchile.cl/handle/2250/103835.
Повний текст джерелаCampbell, John William M. "Reentrant metal-insulator transitions in silicon-MOSFETs." Thesis, University of Ottawa (Canada), 1995. http://hdl.handle.net/10393/9768.
Повний текст джерелаNassal, Michelle MJ. "Identification of novel therapeutic targets for reentrant arrhythmias." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1459508947.
Повний текст джерелаBoersma, Lucas Victor August. "Mapping of reentrant ventricular tachycardia in the rabbit heart." Maastricht : Maastricht : Universitaire Pers Maastricht ; University Library, Maastricht University [Host], 1994. http://arno.unimaas.nl/show.cgi?fid=6590.
Повний текст джерелаIvaschenko, M. "Noise-induced reentrant transition of the stochastic duffing oscillator." Thesis, Видавництво СумДУ, 2006. http://essuir.sumdu.edu.ua/handle/123456789/21639.
Повний текст джерелаPhilip, Deepu. "Scheduling Reentrant Flexible Job Shops with Sequence Dependent Setup Times." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/philip/PhilipD0805.pdf.
Повний текст джерелаHansen, Brian Josef. "Uncovering Reentrant Drivers of Atrial Fibrillation in the Human Heart." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1582637810923286.
Повний текст джерелаAffonso, Guilherme de Camargo Barros. "A guitarra dos séculos XVII e XVIII em seus aspectos técnicos e estilístico-históricos através da tradução comentada e análise do Instruccion de musica sobre la guitarra española de Gaspar Sanz, 1697." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/27/27158/tde-13112015-100615/.
Повний текст джерелаThis work deals with the commented translation into Portuguese of the Instruccion de Musica sobre la Guitarra Española , by Gaspar Sanz (1697), one of the most important books of repertoire and instructions on how to play the five orders guitar, we now call baroque guitar. This translation aims to contextualize Sanz\'s, text, leading the reader, even those not used to reading the treaties of the seventeenth and eighteenth centuries, subsidies to help understanding the text and make practical use of it\'s content. As the Instruccion, this work addresses the most diverse topics concerning the baroque guitar: solo music, where reentrant tuning shows to be essential to their understanding, accompanying music in its various aspects, rasqueado, ponteado and obbligato, ornamentation, choice of chords and different tunings. It also covers, although not as its main objective, a proposed methodology for transcription of the original tablature, taking into account the modified reentrant tuning. Comments on the vast content of the Instruccion are based on the reading of Sanz\'s work in mutual comparison with other primary and secondary sources, but also, and not least, in my experience as a player of early plucked strings over fifteen years. All examples and transcriptions bring also the facsimile, inviting the reader to exercise their curiosity about primary sources and making it in fact their main goal.
Li, Dawei. "Relaxation dynamics in some reentrant disordered magnetic systems, FeNiCr, FeNiMn, CrFe." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23627.pdf.
Повний текст джерелаHill, Yolanda Roselle. "Utilising an in silico approach to determine vulnerability to reentrant arrhythmias." Thesis, King's College London (University of London), 2016. https://kclpure.kcl.ac.uk/portal/en/theses/utilising-an-in-silico-approach-to-determine-vulnerability-to-reentrant-arrhythmias(72cf5985-d528-4c3f-bdaf-745be3ea5d1c).html.
Повний текст джерелаBarbosa, Wallison Carlos de Sousa. "Punção em lajes lisas de concreto armado com pilares de canto reentrante." reponame:Repositório Institucional da UnB, 2012. http://repositorio.unb.br/handle/10482/10968.
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A ligação direta entre pilares e lajes de concreto armado é uma alternativa cada vez mais freqüente nos projetos de construção civil. Diversos fatores podem indicar a conveniência da utilização de um modelo estrutural do tipo laje lisa, ou solução com pilar apoiado em uma laje. Em ambos os casos, têm-se a situação da carga aplicada em uma área reduzida, gerando tensões de cisalhamento significativas na região da laje ao redor do pilar ou área carregada. Assim a laje tende a romper por punção. Neste trabalho foram investigados o comportamento estrutural e a resistência última à punção de ligações entre lajes lisas e pilares de canto reentrante. As principais variáveis consideradas foram: armadura de cisalhamento e excentricidade de carga na ligação. Foram ensaiados quatro modelos locais de ligação laje-pilar de canto reentrante, distribuídos em dois grupos: um com duas lajes sem armadura de cisalhamento, ensaiadas com diferentes excentricidades de carga e o outro grupo com duas lajes, uma com três e a outra com quatro camadas de double headed studs com disposição radial. Foram analisados os resultados de cargas últimas, fissuração, deslocamento vertical, deformações das armaduras de flexão e de cisalhamento e do concreto, e rotação das lajes. A armadura de cisalhamento e as diferentes excentricidades de carga influenciaram o comportamento e a carga de ruptura das lajes. Essas influências foram quantificadas. Os resultados experimentais foram comparados com os estimados segundo as normas: NBR 6118:2007, Eurocode 2:2004 e ACI 318:2008. Para os modelos sem armadura de cisalhamento as estimativas de resistência à punção obtidas com a NBR 6118:2007 e o Eurocode 2:2004 foram semelhantes aos resultados obtidos experimentalmente, enquanto que o ACI 318:2008 apresentou resultados mais conservadores de resistência à punção em relação aos observados em laboratório. _________________________________________________________________________________ ABSTRACT
The direct link between reinforced concrete columns and slabs is an alternative increasingly common in civil construction projects. Several factors may indicate the convenience of the use of a structural model of the type flat slab or with column supported by a slab. In both cases, there is the situation of load applied in a small area, generating significant shear stresses in the region of the slab around the column or the loaded area, thus the slab tends to fail by punching. In this work it was investigated the structural behavior and ultimate punching strength of connections between flat slabs and reentrant corner columns. The main variables considered were shear reinforcement and eccentricity of the load on the link. Four local models of slab-reentrant corner column link were tested, divided in two groups: one with two slabs without shear reinforcement tested with different load eccentricities and the other with two slabs, one with three and the other with four layers of double headed studs with radial layout. It was analyzed the results of ultimate load, cracking, vertical displacement, strains in bending and shear reinforcement and at the bottom surface of the concrete, and slab rotation. The shear reinforcement and different load eccentricities influenced the behavior and rupture load of the slabs. These influences were quantified. The experimental results were compared with those estimated according to the codes: NBR 6118:2007, Eurocode 2:2004 and ACI 318: 2008. For models without shear reinforcement, estimates of punching strength obtained with NBR 6118:2007 and Eurocode 2:2004 were similar to those obtained experimentally, while ACI 318:2008 presented more conservative results of punching strength than those observed in laboratory.
Xu, Aoxiang. "Computer simulation of reentrant spiral-wave activity in two-dimensional ventricular myocardium." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29811.pdf.
Повний текст джерелаXu, Aoxiang 1969. "Computer simulation of reentrant spiral-wave activity in two-dimensional ventricular Myocardium." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=27436.
Повний текст джерелаLiberos, Mascarell Alejandro. "Mathematical modeling approaches for the diagnosis and treatment of reentrant atrial tachyarrhythmias." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/62166.
Повний текст джерела[ES] Las taquiarritmias auriculares tienen una alta prevalencia en el mundo desarrollado, además diversos estudios poblacionales indican que en las próximas décadas ésta se verá incrementada. Los mecanismos de micro o macro-reentrada de los frentes de onda eléctricos que rigen el comportamiento mecánico del corazón, se presentan como una de las principales causas del mantenimiento de estas arritmias. El flutter auricular es mantenido por un macro-reentrada alrededor de un obstáculo anatómico o funcional en las aurículas, mientras que en el caso de la fibrilación auricular la hipótesis que define a los rotores de alta frecuencia como elementos dominantes y responsables del mantenimiento de la arritmia se ha ido imponiendo al resto en los últimos años. Sin embargo, las terapias que tienen como objetivo finalizar o aislar estas reentradas tienen todavía una eficacia limitada. La ablación por radiofrecuencia permite eliminar zonas del tejido cardiaco resultando en la interrupción del circuito de reentrada en el caso de macro-reentradas o el aislamiento de comportamientos micro-reentrantes. La localización no invasiva de los circuitos reentrantes incrementaría la eficacia de estas terapias y reduciría la duración de las intervenciones quirúrgicas. Por otro lado, las terapias farmacológicas alteran las expresiones iónicas asociadas a la excitabilidad y la refractoriedad del tejido con el fin de dificultar el mantenimiento de comportamientos reentrantes. Este tipo de terapias exigen incrementar el conocimiento de los mecanismos subyacentes que explican el proceso de reentrada y sus propiedades, la investigación de estos mecanismos permite definir las dianas terapéuticas que mejoran la eficacia en la extinción de estos comportamientos. En esta tesis el modelado matemático se utiliza para dar un paso importante en la minimización de las limitaciones asociadas a estos tratamientos. La cartografía eléctrica de superficie ha sido testada, clínicamente y con simulaciones matemática,s como técnica de diagnóstico y localización de circuitos macro-reentrantes. El análisis de mapas de fase obtenidos a partir de los registros multicanal de derivaciones electrocardiográficas distribuidas en la superficie del torso permite diferenciar distintos circuitos de reentrada. Es por ello que esta técnica de registro y análisis se presenta como una herramienta para la localización no invasiva de circuitos macro y micro-reentrantes. Una población de modelos matemáticos, diseñada en esta tesis a partir de los registros de los potenciales de acción de 149 pacientes, ha permitido evaluar los mecanismos iónicos que definen las propiedades asociadas a los procesos de reentrada. Esto ha permitido apuntar al bloqueo de la corriente ICaL como diana terapéutica. Ésta se asocia al incremento del movimiento del núcleo que facilita el impacto del rotor con otros frentes de onda u obstáculos extinguiéndose así el comportamiento reentrante. La variabilidad entre pacientes reflejada en la población de modelos ha permitido además mostrar los mecanismos por los cuales un mismo tratamiento puede mostrar efectos divergentes, así el uso de poblaciones de modelos matemáticos permitirá prevenir efectos secundarios asociados a la variabilidad entre pacientes y profundizar en el desarrollo de terapias individualizadas. Estos trabajos se cimientan sobre una plataforma de simulación de electrofisiología cardiaca de basado en Unidades de Procesado Gráfico (GPUs) y desarrollada en esta tesis. La plataforma permite la simulación de modelos celulares cardiacos así como de tejidos u órganos con geometría realista, mostrando unas prestaciones comparables con las de las utilizadas por los grupos de investigación más potentes en el campo de la electrofisiología.
[CAT] Les taquiarítmies auriculars tenen una alta prevalença en el món desenvolupat, a més diversos estudis poblacionals indiquen que en les pròximes dècades aquesta es veurà incrementada. Els mecanismes de micro o macro-reentrada dels fronts d'ona elèctrics que regeixen el comportament mecànic del cor, es presenten com una de les principals causes del manteniment d'aquestes arítmies. El flutter auricular és mantingut per una macro-reentrada al voltant d'un obstacle anatòmic o funcional en les aurícules, mentre que en el cas de la fibril·lació auricular la hipòtesi que defineix als rotors d'alta freqüència com a elements dominants i responsables del manteniment de l'arítmia s'ha anat imposant a la resta en els últims anys. No obstant això, les teràpies que tenen com a objectiu finalitzar o aïllar aquestes reentrades tenen encara una eficàcia limitada. L'ablació per radiofreqüència permet eliminar zones del teixit cardíac resultant en la interrupció del circuit de reentrada en el cas de macro-reentrades o l'aïllament de comportaments micro-reentrants. La localització no invasiva dels circuits reentrants incrementaria l'eficàcia d'aquestes teràpies i reduiria la durada de les intervencions quirúrgiques. D'altra banda, les teràpies farmacològiques alteren les expressions iòniques associades a la excitabilitat i la refractaritat del teixit amb la finalitat de dificultar el manteniment de comportaments reentrants. Aquest tipus de teràpies exigeixen incrementar el coneixement dels mecanismes subjacents que expliquen el procés de reentrada i les seues propietats, la recerca d'aquests mecanismes permet definir les dianes terapèutiques que milloren l'eficàcia en l'extinció d'aquests comportaments. En aquesta tesi el modelatge matemàtic s'utilitza per a fer un pas important en la minimització de les limitacions associades a aquests tractaments. La cartografia elèctrica de superfície ha sigut testada, clínicament i amb simulacions matemàtiques com a tècnica de diagnòstic i localització de circuits macro-reentrants. L'anàlisi de mapes de fase obtinguts a partir dels registres multicanal de derivacions electrocardiogràfiques distribuïdes en la superfície del tors permet diferenciar diferents circuits de reentrada. És per açò que aquesta tècnica de registre i anàlisi es presenta com una eina per a la localització no invasiva de circuits macro i micro-reentrants. Una població de models matemàtics, dissenyada en aquesta tesi a partir dels registres dels potencials d'acció de 149 pacients, ha permès avaluar els mecanismes iònics que defineixen les propietats associades als processos de reentrada. Açò ha permès apuntar al bloqueig del corrent ICaL com a diana terapèutica. Aquesta s'associa a l'increment del moviment del nucli que facilita l'impacte del rotor amb altres fronts d'ona o obstacles extingint-se així el comportament reentrant. La variabilitat entre pacients reflectida en la població de models ha permès a més mostrar els mecanismes pels quals un mateix tractament pot mostrar efectes divergents, així l'ús de poblacions de models matemàtics permetrà prevenir efectes secundaris associats a la variabilitat entre pacients i aprofundir en el desenvolupament de teràpies individualitzades. Aquests treballs es fonamenten sobre una plataforma de simulació de electrofisiologia cardíaca basat en Unitats de Processament Gràfic (GPUs) i desenvolupada en aquesta tesi. La plataforma permet la simulació de models cel·lulars cardíacs així com de teixits o òrgans amb geometria realista, mostrant unes prestacions comparables amb les de les utilitzades per els grups de recerca més importants en aquesta área.
Liberos Mascarell, A. (2016). Mathematical modeling approaches for the diagnosis and treatment of reentrant atrial tachyarrhythmias [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/62166
TESIS
Albuquerque, Elaine Jaricuna Pereira de. "Punção em lajes lisas com armadura de cisalhamento e pilar de canto reentrante." reponame:Repositório Institucional da UnB, 2015. http://repositorio.unb.br/handle/10482/18905.
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Ligações laje-pilar em lajes lisas podem romper por punção para uma carga inferior à correspondente de flexão, devido às altas tensões advindas do momento fletor e do esforço cortante, e por isso tem sido muito estudadas. No entanto, dentre os tipos de ligação lajepilar (pilar interno, de borda ou de canto), as ligações com pilares de canto reentrante não havia ainda sido estudado com profundidade, principalmente no caso de momentos desbalanceados em uma ou duas direções. Nesta pesquisa foram analisadas experimentalmente 12 (doze) ligações lajes lisas / pilar, com pilar quadrado de canto reentrante com 300 mm de lado, com espessura de 180 mm, e as principais variáveis investigadas foram a presença de armadura de cisalhamento disposta radialmente, a taxa de armadura de flexão na região do pilar, que variou de 0,8 a 2,1%, a presença de armadura de torção no bordo, e o desbalanceamento dos momentos nas duas direções, com excentricidades variando de 267 a 504mm. Durante os ensaios foram monitoradas as deformações nas armaduras de flexão, cisalhamento e torção; deformações no concreto; deslocamentos verticais; padrão de fissuração; cargas últimas; rotações das lajes e modos de ruptura. Os resultados experimentais foram comparados com uma proposição para a determinação das resistências esperadas pelas normas NBR 6118 (2014), Eurocode 2 (2004) e ACI 318 (2014), e pelas recomendações do MC2010 (2013), pois as lajes lisas com pilares reentrantes não são abordados por estas normas e recomendações. Também foi realizada uma simulação numérica utilizando o software ATENA, que emprega o método dos elementos finitos para efetuar análises tridimensionais não lineares em estruturas de concreto armado. ____________________________________________________________________________________________________ ABSTRACT
In failure slab-column connection failure of flat slabs is observed high stresses are originated by that of bending and shearing efforts, which can cause failure by punching with a load lower than the bending. The types of slab-column connection, internal, edge, corner and re-entrant corner can appear in any deck. However the connection slab-column of reentrant corner is not discussed by any research as the other cases, its mechanical model and its behavior with unbalanced moments in one or both directions are unknown. In this research were analyzed experimentally 12 flat slabs with thickness of 180 mm, supported by a square column with sides of 300 mm and molded with machined concrete with average strength of 45 MPa. The experimental results were: strain in bending, shear and torsion reinforcement; concrete strains; vertical displacement; map of cracking; ultimate loads; rotations of the slabs and failure modes. The variables were: eccentricity, bending reinforcement ratio, amount of shear reinforcement and torsion reinforcement. Strength of punching shear get in the tests was compared with the strength provided by the NBR 6118 code (2014), Eurocode 2 (2004), ACI 318 (2014) and MC2010 (2013), but all the standards had to be adapted because they do not cover punching in slabs with reentrant corner column. Also a numerical simulation was made using the ATENA software designed to make non-linear three-dimensional analysis of reinforced concrete structures. Thus, the data monitored in the laboratory ware correlated with the results from finite element modeling. Some of the major contributions of this study were to show the general behavior of the slab connection with reentrant corner column with respect to displacements, strains, cracking, failure mode and failure surface; analyze the behavior and the adapted codes; and show how to treat this type of connection.
Ramalingam, Sanjiv. "ROLE OF CONDUCTION IN THE GENESIS OF ALTERNANS OF ACTION POTENTIAL DURATION IN A SIMULATED ONE DIMENSIONAL FIBER." UKnowledge, 2007. http://uknowledge.uky.edu/gradschool_theses/442.
Повний текст джерелаByrd, Israel A. "Interactions between trains of premature stimuli and anatomically anchored reentrant wavefronts implications for antitachycardia pacing /." Birmingham, Ala. : University of Alabama at Birmingham, 2006. http://www.mhsl.uab.edu/dt/2006p/byrd.pdf.
Повний текст джерелаKadota, Shin. "Development of a reentrant arrhythmia model in human pluripotent stem cell-derived cardiac cell sheets." Kyoto University, 2013. http://hdl.handle.net/2433/174801.
Повний текст джерелаKunadilok, Jakrawarn. "Heuristics for scheduling reentrant flexible job shops with sequence-dependent setup times and limited buffer capacities." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1202409422/.
Повний текст джерелаDietl, Jochen [Verfasser], Peter [Akademischer Betreuer] Stephan, and Johannes [Akademischer Betreuer] Janicka. "Numerical Simulation of Pool Boiling from Reentrant Type Structured Surfaces / Jochen Dietl. Betreuer: Peter Stephan ; Johannes Janicka." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2015. http://d-nb.info/1111910588/34.
Повний текст джерелаPeavey, Milo Camp. "Quantifying the source of reentrant line variability and the effects of processes standardization on tool availability variability." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39287.
Повний текст джерелаIncludes bibliographical references (p. 46).
This thesis quantifies the sensitivity of tool availability variability with respect to product throughput and examines how Intel's High Precision Maintenance initiative can be used to minimize these effects. Tools with variable availability release spikes of material into a route which can cause down stream areas to experience irregular queues. The reentrant multi product loops typical to Intel's manufacturing processes can make it difficult to identify the source of long queues. The variability analysis, developed during the internship uses D2 facility availability and cycle time data to generate a variability correlation, called TAC-TOOT which identifies tools within the facility contributing to throughput time. The High Precision Maintenance initiative is an Intel developed program which focuses on the standardization of maintenance processes. The success of the High Precision Maintenance initiative is closely linked to the ability of factory management to motivate equipment technicians. The thesis examines a number of tools with highly variable availability, the effects of the high precision initiative on variability and levers factory management can use to motivate technicians.
by Milo Camp Peavey.
M.B.A.
S.M.
Gasol, Escuer Emma. "Transportador de aminoácidos heteromérico xCT: identificación, caracterización funcional y topología." Doctoral thesis, Universitat de Barcelona, 2004. http://hdl.handle.net/10803/2993.
Повний текст джерелаAl inicio de esta tesis, nos propusimos identificar alguna nueva subunidad ligera humana de esta familia. Mediante búsqueda por homología de secuencia se clonó el cDNA correspondiente a una nueva proteína altamente homóloga a una proteína de ratón asociada al sistema de transporte xc-. La caracterización funcional confirmó que xCT humano, en combinación con 4F2hc, induce una actividad de transporte de cistina y glutamato, con sodio-independencia (sistema xc-). Los perfiles de captación de los sustratos en función del pH del medio de transporte indican que tanto el L-glutamato como la L-cistina son transportados de forma aniónica, cada uno con una carga negativa neta. Por experimentos de salida de sustrato se determinó el carácter intercambiador de este transportador, con una estequiometría de 1:1.
El patrón de expresión de xCT humano por Northern blot muestra una ligera banda presente únicamente en cerebro. Experimentos de RT-PCR también resultaron positivos para los islotes pancreáticos y líneas celulares correspondientes a líneas epiteliales y tumorales, mientras riñón e hígado no mostraron ninguna señal. El papel fisiológico de xCT parece estar implicado en la captación de cistina para la síntesis de glutatión y su mantenimiento, dándole un papel relevante en situaciones de estrés oxidativo.
A continuación se abordó la determinación de la topología de xCT como modelo de subunidad ligera. Experimentos de inmunodetección evidencian la localización intracelular de los dos extremos de la proteína. Utilizando la estrategia de introducir cisteínas individuales en los distintos loops y testar su accesibilidad a reactivos tiol-específicos, la topología de xCT es compatible con un modelo de 12 dominios transmembrana. Los resultados obtenidos en la zona IL2-3, con dos residuos de accesibilidad exterior (el 110 y 112) flanqueados por residuos de accesibilidad interior (el 102, 109 y 116) en un rango de 15 aminoácidos nos hacen pensar en una estructura de reentrant loop, con el residuo H110 como ápice. El hecho que estas estructuras suelen ser zonas asociadas a la ruta de paso del sustrato del transportador, nos llevó a estudiar la implicación del residuo H110.
En resumen, los resultados muestran que i) la biotinilación del residuo H110C se bloquea por los sustratos y el inhibidor no transportable 4SCPG; ii) la inactivación provocada por MTSES en el transporte de h110c también es protegida por los sustratos con una IC50 similar a la Km para cada sustrato; iii) esta protección es independiente de temperatura, y por tanto no implica grandes cambios conformacionales; y iv) aunque los mutantes H110C y H110D no alteraron la Km del transportador ni su especificidad de sustrato, la sustitución por una lisina inactiva totalmente la función de xCT. Por tanto, tenemos evidencias de que H110 se encuentra cercano al lugar de unión al sustrato o ruta de paso del mismo.
Estos resultados pueden encontrarse en las publicaciones siguientes: J Biol Chem (2004) vol. 279, 31228-36, J Biol Chem (2004) vol. 279, 11214-21, y Pflugers Arch. (2001) vol. 442 (2) 286-296.
ENGLISH
The family of heteromeric amino acid transporters has the particular characteristic of being composed of two proteins: a light subunit (LSHAT) and a heavy subunit (HSHAT) linked by a disulfide bridge. Some of its members are associated with hereditary aminoacidurias. Characterisation of a new human LSHAT, responsible for transport system xc-, is reported here. Human xCT associates with 4F2 heavy chain and induces cystine/glutamate exchange with sodium independence and 1:1 molar ratio.
Topology studies using immunodetection and substituted cysteine accessibility method reveal a model compatible with 12 transmembrane domains and intracellular N and C-terminus. The results obtained in the intracellular loop between 2 and 3 transmembrane domain (IL2-3), with two residues of extracellular accessibility (110 and 112) flanked by residues of intracellular accessibility (the 102, 109 and 116) in a rank of 15 amino acids, resembles the structure of a reentrant loop with apex in position H110. The fact that these structures are usually associated with the substrate pathway through the transporter, lead us to further studies with residue H110.
In summary, the results on that position show that: i) biotinylation of H110C is blocked by its substrate and the non-transportable inhibitor 4-S-carboxiphenyl-glycine (4-S-CPG); (ii) the inactivation caused by MTSES in the transport of mutant H110C is also protected by each substrate with a IC50 similar to the Km; (iii) this protection is independent of temperature, and therefore it does not imply great conformational changes; and (iv) although mutants H110C and H110D did not alter the Km of the transporter nor their specificity of substrate, the substitution by a lysine inactivates the function of xCT totally. Therefore, we conclude that residue H110 resides near the binding site/translocation pathway of the substrates in the transporter xCT.
These results can be found in the following publications: J Biol Chem (2004) vol. 279, 31228-36, J Biol Chem (2004) vol. 279, 11214-21, y Pflugers Arch. (2001) vol. 442 (2) 286-296.
Chow, Wai Cheong. "The determinants of the diastolic conduction pathway in the reentrant circuits of monomorphic ventricular tachycardia in the human heart." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405851.
Повний текст джерелаAZARIA, PATRICK. "Systemes frustres." Paris 6, 1988. http://www.theses.fr/1988PA066641.
Повний текст джерелаVaradarajan, Amrusha. "Stochastic Scheduling for a Network of MEMS Job Shops." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/77038.
Повний текст джерелаPh. D.
Ait, Bahammou Abdellah. "Application de l'effet Mössbauer à l'étude de milieux désordonnés : alliages terre rare-fer hydrogénés et verres de spin." Grenoble 1, 1986. http://www.theses.fr/1986GRE10098.
Повний текст джерелаMhiri, Emna. "Planification de la production à capacité finie dans un contexte à forte variabilité, application à l'industrie des semi-conducteurs." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT066/document.
Повний текст джерелаIn this study, we consider the problem of production planning in the semiconductor industry characterized by high mix low volume production, reentrant flows and complex manufacturing process.The aim of this work is to establish a feasible production schedule that takes into account the limited capacity of the manufacturing system, equipment qualifications constraints and delivery due dates. In this context, we have formulated the objective and constraints in a mixed linear program (MIP). The objective of the MIP is to minimize delivery delays to guarantee on-time delivery. While executing different tests of the MIP, we have reached a limit of resolution in a reasonable time. Thus, we use an approximate method to solve the problem. The results show the effectiveness of the heuristic established as solution quality and time resolution.The obtained results led to an industrial application and a software that provides feasible schedules in reduced execution time in a specific fab
Fukuda, Juliana Cristina. "Avaliação de Variáveis para Delimitação de Áreas Protegidas Costeiras e Marinhas: sugestão de limites para uma Unidade de Conservação costeira de Uso Sustentável na região das Reentrâncias Maranhenses (Estado do Maranhão, Brasil)." Universidade Federal do Maranhão, 2006. http://tedebc.ufma.br:8080/jspui/handle/tede/1197.
Повний текст джерелаThe protected areas (PAs) for nature conservation are important tools for maintaining ecological function and biodiversity conservation in a determined region. Specific laws for their protection are applied in the defined space within their limits. Thus, considering boundaries definition as a characteristic of fundamental importance to reach the goals for which the protected area has been created, in this work we aimed to evaluate socioeconomic- cultural and environmental features, and also management and political variables for suggesting boundaries to a marine costal protected area (MCPA) in the Reentrâncias Maranhenses region, with special attention to the municipality of Porto Rico do Maranhão. This portion of coast is characterized for its high nutrients levels, macro-tidal regimes, large continental shelf and exuberant mangroves, and the artisanal fishing as the main economic activity. We limited the purpose of this study to the managed MCPAs. We used interviews, field observations, water and sediment samples and secondary information to reach the following goals: 1) survey on the MCPAs in Brazil, analysing the management difficulties answered by their managers related to the boundaries definition; 2) discussion whether to create a new protected area in the region and its advantages; 3) characterize the local fishery and the direct users of fishery resources; 4) make a list of vertebrates species (not including herpetofauna) and benthos species which have occurrence indication in the area; 5) classify the local environments based on orbital images and field work; 6) sample estuarine waters for physical and chemical analysis; 7) consider land tenure, fishery management and navigation safety issues. The main contributions of this work are: a) information on 141 publicly managed coastal and marine protected areas; b) confirmation that in the older protected areas there have been fewer studies on boundary definition, in inverse proportion to current occurrence of management problems. These studies have been more frequent in the Extractive Reserves than in the Environmental Protected Areas; c) indications of an unsustainable fishery, socially, economically and environmentally endangering the region; d) occurrence indication of 89 fish morphospecies, 25 of shore birds and 6 of mammals, emphasizing the ones in danger of extinction; e) elaboration and analysis of a multi-criteria matrix to indicate the most important environments for protection; f) indication of an ideal area for protection, only considering environmental concepts and indication of an area we believe would be the most suitable for a PA, considering the other management variables. Yet, this suggestion must be discussed with all the stakeholders, in a consistent effort to make aware and empower the users so that they realize that the conflicts and problems will only be minimized with stakeholder participation and commitment to the issue.
As Unidades de Conservação (UCs) áreas protegidas para conservação da natureza são importantes instrumentos para conservação da biodiversidade e dos recursos ambientais de determinada região. Legislações específicas para sua proteção se aplicam ao espaço definido pelos seus limites. Desta forma, considerando a delimitação de uma UC como característica de fundamental importância para atingir os objetivos pelas quais a área foi criada, buscamos neste trabalho avaliar características ambientais e sócio-econômico-culturais, bem como variáveis políticas e de gestão, para sugerir limites para uma Unidade de Conservação costeiro-marinha (UCCM) na região das Reentrâncias Maranhenses, com especial atenção à região do município de Porto Rico do Maranhão. Esta porção da costa é caracterizada pelo alto aporte de nutrientes, regime de macro-marés, plataforma continental larga e manguezais exuberantes, sendo a pesca artesanal a principal atividade econômica. O escopo deste trabalho foi limitado às UCCMs de uso sustentável. Através de entrevistas, observações de campo, coleta de água e sedimento, e dados secundários, realizaramse: 1) levantamento das UCCMs de uso sustentável do Brasil, analisando-se as dificuldades de gestão relacionadas aos limites da área, de acordo com seus atuais gestores; 2) discussão sobre a necessidade e vantagens de se criar uma nova UC na região; 3) caracterização da pesca e dos usuários diretos dos recursos pesqueiros na região; 4) listagem das espécies de vertebrados (exceto herpetofauna) e de bentos de ocorrência na área; 5) classificação de ambientes lcoais com base em imagens orbitais e trabalho de campo; 6) amostragem de águas estuarinas para análises físicoquímicas; 7) considerações referentes a questões fundiárias, de pesca e de segurança da navegação. Como principais contribuições deste trabalho citam-se: a) levantamento de dados referentes a 141 UCCMs de uso sustentável, exceto RPPNs; b) confirmação de que as UCs mais antigas tiveram menos estudos para delimitação da área a ser protegida, em proporção inversa à ocorrência de problemas de gestão atuais. Entre as Reservas Extrativistas os estudos foram mais freqüentes do que entre as Áreas de Proteção Ambiental; c) demonstração de indícios de insustentabilidade da atividade pesqueira, com comprometimento social, econômico e ambiental da região; d) indicação de ocorrência de 89 morfoespécies de peixes, 25 de aves costeiras e 6 de mamíferos, destacando-se espécies ameaçadas de extinção; e) elaboração e análise de uma matriz-multi-critérios, para indicar ambientes mais importantes para proteção; f) indicação de uma área ideal para proteção, considerando apenas conceitos ambientais, e de uma área que acreditamos ser a mais adequada para a uma UC, considerando demais variáveis de gestão. Esta proposta deve ainda ser discutida juntamente com todos os grupos interessados, em um esforço consistente de conscientização dos usuários e empoderamento dos mesmos, assim como promoção de alternativas de geração de renda, de forma que eles percebam que os conflitos existentes só serão minimizados com a própria participação e comprometimento da comunidade interessada em relação à questão.
Lee, Se Il. "Statistical thermodynamics of virus assembly." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/33900.
Повний текст джерелаSkrotzki, Richard. "Supraleitung in Gallium-implantiertem Silizium." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-207365.
Повний текст джерелаThe following thesis is devoted to the electrical characterization of 10 nm thin layers consisting of amorphous Ga nanoclusters embedded in Ga-doped polycrystalline Si. The preparation of the layers is realized via ion implantation in Si wafers plus subsequent thermal annealing. Electrical-transport measurements in magnetic fields of up to 50 T show that the layers undergo two structural superconductor-insulator transitions upon variation of the annealing parameters. Structural analyzes based on TEM investigations reveal an underlying transformation of the size and distance of the clusters. This influences the interplay of the superconducting cluster coupling and capacitive charging energy as well as the extent of thermal and quantum fluctuations. In the superconducting regime (Tc = 7 K) a double-reentrant phenomenon is observed. Here, magnetic fields of several Tesla facilitate superconductivity in an anisotropic way. A qualitative explanation is given via a self-developed theoretical model based on phase-slip events for Josephson-junction arrays. With respect to applications regarding sensor technology and quantum logic circuits the layers are successfully micro- and nanostructured via photolithography and FIB. This allows for the first observation of the Little-Parks effect in a nanostructure of amorphous Ga
Bordet, Pierre. "Contribution à l'étude structurale de séries de composés supraconducteurs ou magnétiques : les stannures de terres rares et métaux précieux et les cuprates supraconducteurs à hautes températures." Grenoble 1, 1989. http://www.theses.fr/1989GRE10003.
Повний текст джерелаCourtois, Jérémie. "Développements de systèmes multipassages pour application à la spectroscopie d'absorption : Cavity Ring Down Spectroscopy multimode et cellules à passages multiples." Phd thesis, Université Paris Sud - Paris XI, 2009. http://tel.archives-ouvertes.fr/tel-00458101.
Повний текст джерелаKhacef, Lyes. "Exploration du calcul bio-inspiré avec des architectures neuromorphiques auto-organisées." Thesis, Université Côte d'Azur, 2020. http://www.theses.fr/2020COAZ4085.
Повний текст джерелаThe brain's cortical plasticity is one of the main features that enable our capability to learn and adapt in our environment. Indeed, the cerebral cortex has the ability to self-organize itself through two distinct forms of plasticity: the structural plasticity that creates (sprouting) or cuts (pruning) synaptic connections between neurons, and the synaptic plasticity that modifies the synaptic connections strength. These mechanisms are very likely at the basis of an extremely interesting characteristic of the human brain development: the multimodal association. In spite of the diversity of the sensory modalities, like sight, sound and touch, the brain arrives at the same concepts. Moreover, biological observations show that one modality can activate the internal representation of another modality when both are correlated. To model such a behavior, Edelman and Damasio proposed respectively the Reentry and the Convergence Divergence Zone frameworks where bi-directional neural communications can lead to both multimodal fusion (convergence) and inter-modal activation (divergence). Nevertheless, these theoretical frameworks do not provide a computational model at the neuron level.The objective of this thesis is first to explore the foundations of brain-inspired self-organization in terms of (1) multimodal unsupervised learning, (2) massively parallel, distributed and local computing, and (3) extremely energy-efficient processing. Based on these guidelines and a review of the neural models in the literature, we choose the Self-Organizing Map (SOM) proposed by Kohonen as the main component of our system. We introduce the Iterative Grid, a fully distributed architecture with local connectivity amongst hardware neurons which enables cellular computing in the SOM, and thus a scalable system is terms of processing time and connectivity complexity.Then, we assess the performance of the SOM in the problem of post-labeled unsupervised learning: no label is available during training, then very few labels are available for naming the SOM neurons. We propose and compare different labeling methods so that we minimize the number of labels while keeping the best accuracy. We compare our performance to a different approach using Spiking Neural Networks (SNNs) with Spike Timing Dependant Plasticity (STDP) learning.Next, we propose to improve the SOM performance by using extracted features instead of raw data. We conduct a comparative study on the SOM classification accuracy with unsupervised feature extraction from the MNIST dataset using two different approaches: a machine learning approach with Sparse Convolutional Auto-Encoders using gradient-based learning, and a neuroscience approach with SNNs using STDP learning.To prove the SOM ability to handle more complex datasets, we use transfer learning in the mini-ImageNet few shot classification benchmark to exploit a Wide Residual Network backbone trained on a base dataset as a feature extractor, then we use the SOM to classify the obtained features from the target dataset.Finally, we move into the multimodal association mechanism. We build the Reentrant SOM (ReSOM), a brain-inspired neural system based on the Reentry principles using SOMs and Hebbian-like learning. We propose and compare different computational methods for multimodal unsupervised learning and inference, then quantify the gain of both convergence and divergence mechanisms on three multimodal datasets. The divergence mechanism is used to label one modality based on the other, while the convergence mechanism is used to improve the overall accuracy of the system. We compare our results to SNNs with STDP learning and different fusion strategies, then we show the gain of the so-called hardware plasticity induced by our model, where the system's topology is not fixed by the user but learned along the system's experience through self-organization
TSOBNANG, François. "Étude des phases onde de densité de spin induites par le champ magnétique dans les conducteurs organiques quasi-unidimensionnels : rôle du désordre." Phd thesis, Université Paris Sud - Paris XI, 1991. http://tel.archives-ouvertes.fr/tel-00002745.
Повний текст джерела"Dynamic routing in reentrant FMS." Laboratory for Information and Decision Systems, Massachusetts Institute of Technology, 1986. http://hdl.handle.net/1721.1/2932.
Повний текст джерелаYang, Guoqiang. "Relaxation dynamics in reentrant ferromagnets." 1994. http://hdl.handle.net/1993/18627.
Повний текст джерелаChen, Jen-Shiang, and 陳禎祥. "Minimizing makespan in reentrant shops." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/65452160628665772500.
Повний текст джерела國立臺灣科技大學
工業管理系
91
Most production scheduling-related research assumes that a job visits certain machines at most once. A new type of manufacturing system, the reentrant shop, has recently become prominent. In a reentrant shop, a job may be processed by a certain machine many times. This research studies the problem of scheduling the reentrant job-shop (RJS), reentrant flow-shop (RFS), and reentrant permutation flow-shop (RPFS) with the objective of minimizing the makespan of jobs. This dissertation first proposes six mixed binary integer programming (BIP) models and two level division procedures for the RJS scheduling problems. The six RJS models proposed are RJS-1, RJS-2, RJS-3, RJS-4, RJS-5, and RJS-6. LDB (Level Division by Backtracking) and LDR (Level Division by Reentering) are the two level division procedures. The outcome of the LDB and LDR procedures are incorporated into both the RJS-5 and RJS-6 models to generate the RJS-5B, RJS-5R, RJS-6B, and RJS-6R formulations, respectively. In addition, totally seven mixed BIP models are presented for the RFS and RPFS scheduling problems, where models of RFS-1, RFS-2, RFS-3, and RFS-4 are for the RFS problems, and the other three models of RPFS-1, RPFS-2, and RPFS-3 are for the RPFS problems. This research also presents heuristic methods to solve RJS, RFS, and RPFS problems. For the RJS and RFS problems, this research presents heuristic procedures, including ACT and NDY, based on active and non-delay schedules. Random sampling procedures are used to compare ACT and NDY procedures and test the combinations of 12 priority rules with ACT and NDY. For the RPFS problems, there are six extended heuristic methods provided, and they are RPFS-H1, RPFS-H2, RPFS-H3, RPFS-H4, RPFS-H5, and RPFS-H6 heuristics. Finally, all the mixed BIP models and heuristic methods are tested and their performance measures of such schedules are evaluated and compared.
Huang, Kuang-Shun, and 黃冠碩. "Production Scheduling with Muti-Type Reentrant Flow." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/97607961780627776715.
Повний текст джерела輔仁大學
管理學研究所
95
A good production scheduling may reduce the production cost effectively, increase the operation efficiency, and reduce the idle capacity. It also may deliver products or services to customers in time. The just-in-time concept is more and more popular, and delivering products to customers in time becomes an important factor of the customer satisfaction. Its concept is to hope the finishing time of jobs may close to the due date. The past literatures mostly set the due date as a point. However, it is usually an interval in practice. So this study set the due date as an interval. Most production scheduling-related research assumes that a job visits certain machines at most once. A new type of manufacturing system, the reentrant shop, has recently become prominent. In a reentrant shop, a job may be processed by a certain machine many times. This research discusses a production scheduling with muti-type reentrant flow. The objective is to minimize the sum of total earliness and total tardiness. It proved the ACO is stable, and is effective in efficiency and time.
Shih, Fu-chi, and 施富棋. "The Flow-shop Scheduling Problem with Reentrant Consideration." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/65586891654890641115.
Повний текст джерела雲林科技大學
工業工程與管理研究所碩士班
96
Flow-shop scheduling is one of the most important and popularly discussed subjects in production scheduling. In the recent years, the development of flexible manufacturing system caused the traditional production styles to expand their original characters into reentrant processing, particularly in semi-conductor industry and printed circuit board industry. Moreover, the applications in reentrant job-shop scheduling or reentrant flow-shop scheduling are distinctive from the traditional ones. In this study, some characteristics such as the reentrant processing and buffer limit within the shop stations are taken into account for the proposed a flow shop scheduling problem with minimization of the makespan. Two heuristics based on particle swarm optimization (PSO) and hybrid genetic algorithm (HGA) are developed for solving the proposed scheduling problem. The experimental results demonstrate that the hybrid genetic algorithm achieves higher solution quality than particle swarm optimization heuristic; nevertheless, particle swarm optimization provides more solution efficiency than hybrid genetic algorithm.
Yung, Sung-Da, and 楊松達. "Scheduling of reentrant flow shop with multiple processors." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/10022864926119494230.
Повний текст джерела輔仁大學
管理學研究所
95
The industrial environment is getting more and more competitive today. It is a big challenge for companies to enhance their competency by using their resources efficiently and raising the productivity. Through scheduling technology, we can deliver our products in time, increase our productivity, and enhance our competency. In the traditional setting of scheduling, each job only process on one stage once. However, a job could pass certain stage for several times in a reentrant flow shop. And such kind of producing system can be found in some high tech industry and some specific producing systems. Production sequencing problem with reentrant work flow is getting more and more popular in recent year. As we review all the literatures about the reentrant flow shop with multiple processors, we found that most of them only consider single object, which is not sufficient to fulfill what companies really need today. So we consider the multiple objects, the cost of tardiness, job waiting time, and machine idling time. And we try to apply the ant colony system to solve the NP-complete scheduling problem. Our study uses the integer programming and ant colony system, and we compare the results by simulated data. We prove that the ant colony system is good at timeliness and robustness. And it’s much better than LINGO 8.0 in timeliness. It can provide a quality solution within a reasonable time.
Su, Ren-Jye, and 蘇仁傑. "A Study of Dispatching Algorithm for Reentrant Flows." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/74720708963975701446.
Повний текст джерела國立交通大學
工業工程與管理系
87
This thesis develops a heuristic dispatching rule for wafer fabrication. Queue-time limit, rework, due date, WIP and so on are some key factors to be considered in the proposed dispatching rule. To demonstrate the effectiveness of the proposed dispatching rule, a simple++ simulation model with real fabrication data is employed. Two sets of conventional dispatching rules : (1)commonly used rules includes FIFO and SPT and (2)due-date-based rules including EDD and Slack. Results show that the proposed dispatching rule does give a better performance.
Guo, Chen-Wei, and 郭宸緯. "Reentrant flexible flow shop scheduling with due windows." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/44365216526138798368.
Повний текст джерела輔仁大學
企業管理學系管理學碩士班
99
It is needless to say that high-tech industry is one of representative industries in the world. All corporations are pursuing the goal of maximizing effective and efficiency. But, how they achieve this target is a key issue need to find out. In this case, corporations must attain these objectives which are the improvements of produce effective, satisfactory of customer, and creating the ability of continually profiting via allocating resources properly. The reentrant production scheduling points out that a procedure of making a product may come from a machine processing more time. And it is easy to see this common scene in high-tech industries such as, semiconductor manufacturing. Because of this, the reentrant production problem is gaining more and more attention in recent year. Particle swarm optimization (PSO) has been proven to be a tool of achieving effective and efficient in data clustering, financial forecasting, image processing, etc., but PSO isn’t easily seen in scheduling comparing to other traditional algorithms. This study will use basic PSO concept to improve PSO, named as the Farness Particle Swarm Optimization (FPSO), and compare results of its computational result with the traditional PSO and Ant Colony Optimization (ACO). Experiments confirmed that the FPSO provides both time and solving efficiencies.
Tsorng-HawChen and 陳琮皓. "Atrioventricular reentrant tachycardia Detection with Convolutional Neural Networks." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/g74k3m.
Повний текст джерела國立成功大學
醫學資訊研究所
107
To explore the possibilities of deep learning techniques for interpreting medical images, we work with the Division of Cardiology within the Department of Internal Medicine of National Cheng Kung University Hospital. We outline some related challenges in machine learning for medical image processing and image analysis. Through multi-convolution operation with a large number of medical images, the target feature map is extracted from the images. After that, we get a prediction model which could be used to assist medical researches or medical diagnoses. We pay attention to the deep learning of electrocardiogram (ECG) since deep learning is an extensive and fast-developing field. We extract the electrocardiogram of the single disease-atrioventricular reentrant tachycardia (AVRT) from the database, hope to pre-process the data according to patient's electrocardiogram, apply image recognition and deep learning techniques to the ECG disease prediction and distinguish the characteristic differences between the onset and the normal ECG. We produce a deep learning model to cross-align these ECGs, and train the model to learn image recognition by the characteristics of the ECGs. By this method, we can obtain a prediction model with the accuracy of 96%, which predicts ECGs of a normal person and ECGs of AVRT patients before the attack. Also, we make another model be trained with ECGs of AVRT patients after the attack, we get another prediction model with the accuracy of 82%. Our goal is to apply deep learning to medical processes to assist medical diagnosis and treatment course.
HU, HAN, and 胡瀚. "No-wait Flexible Flow Shop Scheduling with Reentrant Constraints." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/777tp7.
Повний текст джерела輔仁大學
企業管理學系管理學碩士班
107
Scheduling is an important part of production management, and its purpose is to effectively allocate production resources. With the advancement of science and technology, the production system of enterprises has become more complicated. How to improve the performance of production systems with good production schedule has become an important goal pursued by firms which have scheduling problems. Reentrant scheduling problem and no-wait scheduling problem have been proven to be NP-hard in the production schedule, while scheduling problems with no-wait constraint and reentrant are more complex, such as the manufacturing process of wafer fabrication. In several production scheduling environments, flexible flow shop is common in many industries, such as assembly, pharmaceutical and high-tech industries. Therefore, this study focuses on the flexible flow shop Scheduling Problem with no-wait and Reentrant constraints, and proposes the modified genetic algorithm solves the problem in an effective way. The research result of the simulation data shows that the overall improvement rate of the modified genetic algorithm is 19.95%, which is better than 16.76% of the genetic algorithm. As for robustness, both the modified genetic algorithms and the genetic algorithms have robustness rate of more than 87.58%. The results of t-test confirmed that the average solution of the modified genetic algorithm appeared significant different in the average solution of the gene algorithm, indicating that the modified genetic algorithm is better than the genetic algorithm.