Dissertations / Theses on the topic 'Functions of hypercomplex variable'
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Pukhtaievych, Roman. "Periodic and hypercomplex potentials. Properties and applications." Doctoral thesis, Università degli studi di Padova, 2018. http://hdl.handle.net/11577/3425759.
Full textQuesta Tesi si occupa dello studio di problemi al contorno e analizza due linee di ricerca. La prima riguarda lo studio di perturbazioni di problemi al contorno in domini perforati e la sua applicazione all'analisi delle proprieta efficaci dei materiali compositi. Studiamo la dipendenza delle soluzioni di problemi di trasmissione da alcuni parametri e il loro comportamento quando il parametro corrispondente alla dimensione delle inclusioni tende a zero e gli altri parametri tendono ad alcuni valori fissati. In seguito, applichiamo i nostri risultati allo studio della conduttivita efficace di composti periodici. Analizziamo anche il comportamento della soluzione del problema di Dirichlet per l'equazione di Poisson nell'insieme di R3 che consiste in una serie periodica di cilindri in caso di perturbazione della forma della sezione trasversale dei cilindri e la struttura periodica. Inoltre, applichiamo i nostri risultati per studiare il comportamento della permeabilita longitudinale di una serie periodica di cilindri rispetto a tale perturbazione. La seconda parte della Tesi riguarda lo sviluppo di strumenti per risolvere problemi al contorno per funzioni che assumono valore in algebre di Banach commutative. In particolare, studiamo le proprieta dei residui logaritmici delle funzioni monogeniche (continue e differenziabili nel senso di Gateaux) e il comportamento di certi integrali di tipo Cauchy sulla frontiera dell'insieme di definizione. La Tesi si suddivide in due parti ed è organizzata come segue. La parte I è composta da tre capitoli. Nel capitolo 1 studiamo il comportamento asintotico delle soluzioni di problemi di trasmissione (ideale e nonideale) singolarmente perturbati in un dominio periodicamente perforato. Nel capitolo 2 applichiamo i risultati del capitolo 1 per studiare il comportamento asintotico della conduttivita termica efficace di un composto periodico a due fasi diluito. Il capitolo 3 è dedicato allo studio del comportamento della permeabilita longitudinale di una serie periodica di cilindri quando perturbiamo la forma della sezione trasversale dei cilindri e la struttura periodica. La parte II è composta da due capitoli. Nel capitolo 4 introduciamo un'algebra commutativa tridimensionale su C con un radicale unidimensionale e studiamo i residui logaritmici delle funzioni monogeniche in questa algebra. Il capitolo 5 è dedicato allo studio di un analogo dell'integrale di Cauchy che assume valore nell'algebra menzionata e dei suoi valori limite sulla frontiera del dominio di definizione. Alla fine della Tesi, abbiamo inserito tre appendici con alcuni risultati che abbiamo utilizzato nella Tesi.
LEITE, LEONARDO DE SOUZA. "CONICS AND GRAPHS OF FUNCTIONS OF ONE VARIABLE." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26149@1.
Full textCOORDENAÇÃO DE APERFEIÇOAMENTO DO PESSOAL DE ENSINO SUPERIOR
O objetivo deste trabalho é apresentar conteúdos necessários para a construção de uma base sólida em Matemática do Ensino Fundamental e Médio, mas que são em geral mal assimilados pelos alunos. Inicialmente apresentaremos o plano cartesiano, equações de uma e duas variáveis, funções de uma variável real e gráfico de funções. Passaremos então ao estudo de curvas simples e bem conhecidas dos alunos em geral, como a circunferência, e chegaremos até as cônicas rotacionadas. A partir daí, procuramos relacionar as duas partes do trabalho, mostrando como as cônicas podem ser vistas como gráficos de função de uma variável. Pretende-se que este trabalho possa ser utilizado por professores do Ensino Fundamental e Médio em sala de aula, pois boa parte do conteúdo apresentado faz parte do currículo mínimo da Secretaria de Educação do Estado do Rio de Janeiro. Propomos atividades teóricas e computacionais, utilizando o software Geogebra para construção de curvas no plano cartesiano.
The objective of this paper is to present content needed to build a solid foundation in mathematics from primary and secondary schools, but are generally poorly assimilated by the students. Initially present the Cartesian plane, equations of one and two variables, functions of a real variable and function graph. Then we pass to the study of simple curves and well known to students in general, as the circumference, and arrive until the conical rotated. From there, we try to relate the two parts of the work, showing how the taper can be seen as a variable function graphs. It is intended that this work can be used by teachers of primary and secondary education in the classroom, because much of the content presented is part of the minimum curriculum of the Department of Education of the State of Rio de Janeiro. We propose theoretical and computational activities, using the Geogebra software to build curves in the Cartesian plane.
Balli, Umut. "Utility Accrual Real-Time Scheduling Under Variable Cost Functions." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/34358.
Full textMaster of Science
Pettersson, Henrik Bengt. "Variable Stability Transfer Function Simulation." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/33503.
Full textMaster of Science
Oliveira, Ana Carolina de. "Quatérnios, operadores de Fueter e relações quaterniônicas transcendentais /." São José do Rio Preto : [s.n.], 2006. http://hdl.handle.net/11449/94269.
Full textBanca: Gilberto Aparecido Pratavieira
Banca: José Márcio Machado
Resumo: Resumo O objetivo deste trabalho é estabelecer similaridades entre os complexos e os hipercomplexos, motivados em explorar idéias de Murnaghan, que introduziu, pela primeira vez, em uma apresentação elementar, a teoria dos quatérnios baseados no teorema de Moivre. É mostrada em detalhes uma analogia da relação complexa clássica de Moivre para quatérnios, e em brevidade para octônios generalizados, e apresenta-se as conexões com os operadores da teoria de Fueter e as funções transcendentais. A extensão do teorema de Moivre é estudada para quatérnios em definindo-se uma função exponencial quaterniônica.
Abstract: Abstract In this work we establish similarities between the complex and the hipercomplex numbers, motivated in exploring ideas of Murnaghan, that introduced, for the first time, in an elementary presentation, the theory of the quaternions based on the theorem of Moivre. We show an analogy of the classic complex relation of Moivre for quaternions, and briefly discuss generalized octonions, as well as to present connections to operators of the theory of Fueter and transcendental functions. We consider them to study the extension of the theorem of Moivre for quaternions, in defining a exponential function on the quaternions.
Mestre
Oliveira, Ana Carolina de [UNESP]. "Quatérnios, operadores de Fueter e relações quaterniônicas transcendentais." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/94269.
Full textO objetivo deste trabalho é estabelecer similaridades entre os complexos e os hipercomplexos, motivados em explorar idéias de Murnaghan, que introduziu, pela primeira vez, em uma apresentação elementar, a teoria dos quatérnios baseados no teorema de Moivre. É mostrada em detalhes uma analogia da relação complexa clássica de Moivre para quatérnios, e em brevidade para octônios generalizados, e apresenta-se as conexões com os operadores da teoria de Fueter e as funções transcendentais. A extensão do teorema de Moivre é estudada para quatérnios em definindo-se uma função exponencial quaterniônica.
In this work we establish similarities between the complex and the hipercomplex numbers, motivated in exploring ideas of Murnaghan, that introduced, for the first time, in an elementary presentation, the theory of the quaternions based on the theorem of Moivre. We show an analogy of the classic complex relation of Moivre for quaternions, and briefly discuss generalized octonions, as well as to present connections to operators of the theory of Fueter and transcendental functions. We consider them to study the extension of the theorem of Moivre for quaternions, in defining a exponential function on the quaternions.
Balister, P. N. "Two variable #rho#-adic L-functions for CM elliptic curves with supersingular reduction." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240890.
Full textBraun, H. T. F. "Model theory of holomorphic functions." Thesis, University of Oxford, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.401108.
Full textKakehashi, Shoji, Hiroshi Hasegawa, Ken-ichi Sato, Osamu Moriwaki, and Shin Kamei. "Analysis and Development of Fixed and Variable Waveband MUX/DEMUX Utilizing AWG Routing Functions." IEEE, 2009. http://hdl.handle.net/2237/14029.
Full textAhmad, Khan Mumtaz, and Bahman Alidad. "Three Variable Analogue of Boas and Buck Type Generating Functions and Its Generalizations to M-Variables." Pontificia Universidad Católica del Perú, 2014. http://repositorio.pucp.edu.pe/index/handle/123456789/97282.
Full textEl presente artículo trata el anólogo de tres variables de la función generatriz de Boas and Buck [14] para polinomios de dos variables y lo mismo se puede extender para el análogo de m variables. Los resultados obtenidos son extensiones de un artículo previo [14].
Manoharan, Madhu. "Evaluation of a neural network for formulating a semi-empirical variable kernel BRDF model." Master's thesis, Mississippi State : Mississippi State University, 2005. http://library.msstate.edu/content/templates/?a=72.
Full textCheng, Jiuyi. "Two problems in function theory of one complex variable: local properties of solutions of second-order differential equations and number of deficient functions of some entire functions." Diss., Virginia Tech, 1994. http://hdl.handle.net/10919/38553.
Full textSlezak, Jonathan Michael. "Effects of variable training, signaled and unsignaled delays, and [delta]-amphetamine on delay-discounting functions obtained within session." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5650.
Full textTitle from document title page. Document formatted into pages; contains vii, 52 p. : ill. Vita. Includes abstract. Includes bibliographical references (p. 44-48).
Cruz, Carla Maria. "Numerical and combinatorial applications of generalized Appell polynomials." Doctoral thesis, Universidade de Aveiro, 2014. http://hdl.handle.net/10773/13962.
Full textThis thesis studies properties and applications of different generalized Appell polynomials in the framework of Clifford analysis. As an example of 3D-quasi-conformal mappings realized by generalized Appell polynomials, an analogue of the complex Joukowski transformation of order two is introduced. The consideration of a Pascal n-simplex with hypercomplex entries allows stressing the combinatorial relevance of hypercomplex Appell polynomials. The concept of totally regular variables and its relation to generalized Appell polynomials leads to the construction of new bases for the space of homogeneous holomorphic polynomials whose elements are all isomorphic to the integer powers of the complex variable. For this reason, such polynomials are called pseudo-complex powers (PCP). Different variants of them are subject of a detailed investigation. Special attention is paid to the numerical aspects of PCP. An efficient algorithm based on complex arithmetic is proposed for their implementation. In this context a brief survey on numerical methods for inverting Vandermonde matrices is presented and a modified algorithm is proposed which illustrates advantages of a special type of PCP. Finally, combinatorial applications of generalized Appell polynomials are emphasized. The explicit expression of the coefficients of a particular type of Appell polynomials and their relation to a Pascal simplex with hypercomplex entries are derived. The comparison of two types of 3D Appell polynomials leads to the detection of new trigonometric summation formulas and combinatorial identities of Riordan-Sofo type characterized by their expression in terms of central binomial coefficients.
Esta tese estuda propriedades e aplicações de diferentes polinómios de Appell generalizados no contexto da análise de Clifford. Exemplificando uma transformação realizada por polinómios de Appell generalizados, é introduzida uma transformação análoga à transformação de Joukowski complexa de ordem dois. A análise de um n- simplex de Pascal com entradas hipercomplexas permite sublinhar a relevância combinatória de polinómios hipercomplexos de Appell. O conceito de variáveis totalmente regulares e a sua relação com polinómios de Appell generalizados conduz à construção de novas bases para o espaço dos polinómios homogéneos holomorfos cujos elementos são todos isomorfos às potências inteiras da variável complexa. Por este motivo, tais polinómios são chamados de potências pseudo-complexas (PCP). Diferentes variantes de PCP são objeto de uma investigação detalhada. É dada especial atenção aos aspectos numéricos de PCP. Um algoritmo eficiente baseado em aritmética complexa é proposto para a sua implementação. Neste contexto, é apresentado um breve resumo de métodos numéricos para inverter matrizes de Vandermonde e é proposto um algoritmo modificado para ilustrar as vantagens de um tipo especial de PCP. Finalmente, são enfatizadas aplicações combinatórias de polinómios de Appell generalizados. A expressão explícita dos coeficientes de um tipo particular de polinómios de Appell e a sua relação com um simplex de Pascal com entradas hipercomplexas são obtidas. A comparação de dois tipos de polinómios de Appell tridimensionais leva à deteção de novas fórmulas envolvendo somas trigonométricas e de identidades combinatórias do tipo de Riordan – Sofo, caracterizadas pela sua expressão em termos de coeficientes binomiais centrais.
Kurpa, Lidiya, and T. Shmatko. "Investigation of Geometrically Nonlinear Vibrations of Laminated Shallow Shells with Layers of Variable Thickness by Meshless Approach." Thesis, Точка, 2013. http://repository.kpi.kharkov.ua/handle/KhPI-Press/37086.
Full textRemde, Stephen Mark. "Enhancing the performance of search heuristics : variable fitness functions and other methods to enhance heuristics for dynamic workforce scheduling." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4310.
Full textRemde, Stephen M. "Enhancing the Performance of Search Heuristics. Variable Fitness Functions and other Methods to Enhance Heuristics for Dynamic Workforce Scheduling." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4310.
Full textWEGNER, SVEN-AKE. "Projective limits of weighted (LB) - spaces of holomorphic functions." Doctoral thesis, Universitat Politècnica de València, 2010. http://hdl.handle.net/10251/8480.
Full textWegner, S. (2010). Projective limits of weighted (LB) - spaces of holomorphic functions [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/8480
Palancia
Pelagia, Ioanna. "Variable selection of fixed effects and frailties for Cox Proportional Hazard frailty models and competing risks frailty models." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/variable-selection-of-fixed-effects-and-frailties-for-cox-proportional-hazard-frailty-models-and-competing-risks-frailty-models(c75c6314-f43e-4d69-a2de-942bece6a404).html.
Full textLuizelli, Marcelo Caggiani. "Scalable cost-efficient placement and chaining of virtual network functions." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/169337.
Full textNetwork Function Virtualization (NFV) is a novel concept that is reshaping the middlebox arena, shifting network functions (e.g. firewall, gateways, proxies) from specialized hardware appliances to software images running on commodity hardware. This concept has potential to make network function provision and operation more flexible and cost-effective, paramount in a world where deployed middleboxes may easily reach the order of hundreds. Despite recent research activity in the field, little has been done towards scalable and cost-efficient placement & chaining of virtual network functions (VNFs) – a key feature for the effective success of NFV. More specifically, existing strategies have neglected the chaining aspect of NFV (focusing on efficient placement only), failed to scale to hundreds of network functions and relied on unrealistic operational costs. In this thesis, we approach VNF placement and chaining as an optimization problem in the context of Inter- and Intra-datacenter. First, we formalize the Virtual Network Function Placement and Chaining (VNFPC) problem and propose an Integer Linear Programming (ILP) model to solve it. The goal is to minimize required resource allocation, while meeting network flow requirements and constraints. Then, we address scalability of VNFPC problem to solve large instances (i.e., thousands of NFV nodes) by proposing a fixand- optimize-based heuristic algorithm for tackling it. Our algorithm incorporates a Variable Neighborhood Search (VNS) meta-heuristic, for efficiently exploring the placement and chaining solution space. Further, we assess the performance limitations of typical NFV-based deployments and the incurred operational costs of commodity servers and propose an analytical model that accurately predict the operational costs for arbitrary service chain requirements. Then, we develop a general service chain intra-datacenter deployment mechanism (named OCM – Operational Cost Minimization) that considers both the actual performance of the service chains (e.g., CPU requirements) as well as the operational incurred cost. Our novel algorithm is based on an extension of the well-known reduction from weighted matching to min-cost flow problem. Finally, we tackle the problem of monitoring service chains in NFV-based environments. For that, we introduce the DNM (Distributed Network Monitoring) problem and propose an optimization model to solve it. DNM allows service chain segments to be independently monitored, which allows specialized network monitoring requirements to be met in a efficient and coordinated way. Results show that the proposed ILP model for the VNFPC problem leads to a reduction of up to 25% in end-to-end delays (in comparison to chainings observed in traditional infrastructures) and an acceptable resource over-provisioning limited to 4%. Also, we provide strong evidences that our fix-and-optimize based heuristic is able to find feasible, high-quality solutions efficiently, even in scenarios scaling to thousands of VNFs. Further, we provide indepth insights on network performance metrics (such as throughput, CPU utilization and packet processing) and its current limitations while considering typical deployment strategies. Our OCM algorithm reduces significantly operational costs when compared to the de-facto standard placement mechanisms used in Cloud systems. Last, our DNM model allows finer grained network monitoring with limited overheads. By coordinating the placement of monitoring sinks and the forwarding of network monitoring traffic, DNM can reduce the number of monitoring sinks and the network resource consumption (54% lower than a traditional method).
Junior, Jony Arrais Pinto. "Seleção de covariáveis para modelos de sobrevivência via verossimilhança penalizada." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-28072009-214959/.
Full textVariable selection is an important step when setting a parsimonious model. However, the most popular variable selection techniques, such as the best subset variable selection and the stepwise method, do not take into account inherent stochastic errors in the variable selection step. This work presents a study of alternative procedures to more popular methods for the Cox proportional hazards model and the frailty model. The alternative methods are based on penalized likelihood and differ from the usual variable selection methods, since their objective is to exclude from the model non significant variables, estimating their coefficient as zero. The resulting estimator has nice properties with appropriate choices of penalty functions and the tuning parameter. The assessment of these methods was studied through simulations, and an application to a real data set was considered.
Cervo, Victor Leonardo. "Seleção de variáveis para clusterização através de índices de importância das variáveis e Análise de Componentes Principais." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/75915.
Full textThis thesis proposes new approaches for variable selection aimed at forming representative groups of observations. For that matter, we suggest a new variable importance index based on parameters derived from the Principal Component Analysis (PCA), which is integrated to a forward procedure for variable selection. The quality of clustering procedure is assessed by the Silhouette Index. A simulation study is designed to evaluate the robustness of the proposed method on different levels of variable correlation, noise and number of observations to be clustered. Next, we modify the original method by remapping observations through kernel functions tailored to improving the clustering quality and reducing the retained variables. The modified version is applied to 3 databases related to chemical processes, increasing the quality of clustering measured by SI on average 150%, while using around 6% of the original variables.
Lee, Jin Woo. "Multi-level Decoupled Optimization of Wind Turbine Structures Using Coefficients of Approximating Functions as Design Variables." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1501003238831086.
Full textLoganathan, Ramanan Mayoorathen. "Solutions for the flows induced by lazy, forced and pure turbulent plumes." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/273741.
Full textRaoult, Cécile. "Modélisation numérique non-linéaire et dispersive des vagues en zone côtière." Thesis, Paris Est, 2016. http://www.theses.fr/2016PESC1150/document.
Full textIn this work, a potential flow model based on the Euler-Zakharov equations was developed with the objective of simulating the propagation of irregular and multidirectional sea states from deep water conditions to the coast over variable bathymetry. A highly accurate representation of nonlinear and dispersive effects for bidimensional (2DH) nearshore and coastal domains on the order of kilometers is targeted.The preexisting 1DH version of the model, resolving the Laplace Boundary Value problem using a combination of high-order finite difference schemes in the horizontal direction and a spectral approach in the vertical direction, was improved and validated. The generation of incident waves through the implementation of specific Dirichlet and Neumann boundary conditions was studied in detail. In practice, these conditions were used in combination witha relaxation zone to improve the stability of the model.The linear dispersion relation of the model was derived analytically for the flat bottom case. Its analysis showed that the accuracy of the representation of dispersive effects improves significantly by increasing the vertical resolution (i.e. the maximum degree of the Chebyshev polynomial basis used to project the potential in the vertical). A convergence study conducted for moderate to highly nonlinear solitary waves confirmed the exponential convergence in the vertical dimension owing to the spectral approach, and the algebraic convergence in time and in space (horizontal dimension) with orders of about 4 (or higher) in agreement with the numerical schemes used.The capability of the model to represent nonlinear effects induced by variable bathymetry, such as the transfer of energy between harmonic components, as well as the accurate representation of dispersive properties, were demonstrated with comparisons to several experimental data sets. A visco-potential flow formulation was also implemented to take into account viscous effects induced by bulk viscosity and bottom friction. This formulation was validated inthe limit of small viscosity for mild slope bathymetries.To represent 2DH wave fields in complex nearshore domains, the model was extended using an unstructured discretization (scattered nodes) in the horizontal plane. The horizontal derivatives were estimated using the RBF-FD (Radial Basis Function - Finite Difference) method, while the spectral approach in the vertical remained unchanged. A series of sensitivity tests were conducted to evaluate numerically the robustness of the RBF-FD method, including a comparison of a variety of RBFs with or without shape factors and augmented polynomials. The 2DH version of the model was used to simulate two wave basin experiments, validating the approach and demonstrating the applicability of this method for 3D wave propagation, including nonlinear effects. As an initial attempt to improve the computational efficiency ofthe model for running simulations of large spatial domains, the code was adapted to use a parallelized direct linear solver
Santos, Rafael Ribeiro dos. "Um framework para agrupar funções com base no comportamento da comunicação de dados em plataformas multiprocessadas." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-24102018-100329/.
Full textThe increased demand for more efficient computing systems to achieve high performance proposed new challenges to the research community, which needed to search for new heterogeneous platforms for large applications. To utilize the full potential of these platforms, the application can be grouped into small groups that runs on a specific processing unit to reduce the communication bottleneck according to the communication behavior during application execution . With the purpose of offering a more efficient clustering, this project proposes the analysis of clustering of an application taking into account not only the total volume of data, but also the distribution of that volume during the execution time associated to the band and restriction of rate transmission. Although some studies consider the total volume of data for the cluster, it is not clear how this volume is distributed and how the band constraint affects clustering. Thus, in this project was implemented a framework to suggest a cluster considering the distribution of the volume of communication and band restrictions. In addition, an extension module was developed for the external tool MCProf (Memory and Communication Profiler) in order to obtain the distribution of the communication. The validation of the framework was performed by clsutering tests which used applications in which the communication time of the cluster generated by the execution of framework was compared to the results of the clusters considering the literature. The use of this approach showed an increase in performance ranging from 1.117X to 2.621X for the applications used in the experiments.
Monzon, Larissa Weyh. "Números complexos e funções de variável complexa no ensino médio : uma proposta didática com uso de objeto de aprendizagem." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/56236.
Full textThis work presents a suggestion of a didactical sequence for teaching complex numbers and functions in high school. The sequence supposes the use of the learning object "Complex Numbers" with interactive animations, videos and exercises. As a theoretical frame to support our understanding of the knowledge construction process it was taken into account the Vygotsky´s theory and Piaget´s theory. A discussion about the potential of technologies as a teaching tool is also presented, specially about the possibilities related to dynamical semiotic representation in mathematics. The research methodology used was Didactical Engineering. With this methodology was possible to implemented and validate the didactical sequence.
Sevinik, Adiguzel Rezan. "On The Q-analysis Of Q-hypergeometric Difference Equation." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612758/index.pdf.
Full textCosler, Douglas Jay. "Numerical investigation of field-scale convective mixing processes in heterogeneous, variable-density flow systems using high-resolution adaptive mesh refinement methods." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1148412827.
Full textLarsson, David. "Generalized Riemann Integration : Killing Two Birds with One Stone?" Thesis, Linköpings universitet, Matematik och tillämpad matematik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-96661.
Full textÄnda sedan Cauchys tid har integrationsteori i huvudsak varit ett försök att åter finna Newtons Eden. Under den idylliska perioden [. . . ] var derivator och integraler [. . . ] olika sidor av samma mynt.-Peter Bullen, citerad i [24] Under de senaste århundradena har integrationsteori genomgått många förändringar och framförallt har det funnits en spänning mellan Riemanns och Lebesgues respektive angreppssätt till integration. Riemanns definition är ofta den första integral som möter en student pa grundutbildningen, medan Lebesgues integral är kraftfullare. Eftersom Lebesgues definition är mer komplicerad introduceras den först i forskarutbildnings- eller avancerade grundutbildningskurser. Integralen som framställs i det här examensarbetet utvecklades av Ralph Henstock och Jaroslav Kurzweil. Genom att på ett enkelt sätt ändra kriteriet for integrerbarhet i Riemanns definition finner vi en kraftfull integral med många av Lebesgueintegralens egenskaper. Vidare utvidgar den generaliserade Riemannintegralen klassen av integrerbara funktioner i jämförelse med Lebesgueintegralen, medan vi samtidigt erhåller en karaktärisering av Lebesgueintegralen i termer av absolutintegrerbarhet. Eftersom klassen av generaliserat Riemannintegrerbara funktioner är större än de absolutintegrerbara funktionerna blir vissa satser mer omständiga att bevisa i jämforelse med eleganta resultat i Lebesgues teori. Därtill förloras vissa viktiga egenskaper vid sammansättning av funktioner och även möjligheten till abstraktion försvåras. Integralen ska alltså ses som ett komplement till Lebesgues definition och inte en ersättning.
Amaral, Amaury de Souza. "Análise de funções booleanas e engenharia reversa em jogos." reponame:Repositório Institucional da UFABC, 2013.
Find full textOliveira, Gabriela Martins Gonçalves de. "Ajuste de parâmetros em algoritmos de aprendizado de máquina utilizando transferência de aprendizado." reponame:Repositório Institucional da UFABC, 2014.
Find full textFarquhar, Megan Elizabeth. "Cardiac modelling with fractional calculus: An efficient computational framework for modelling the propagation of electrical impulses in the heart." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/120682/1/__qut.edu.au_Documents_StaffHome_StaffGroupH%24_halla_Desktop_Megan_Farquhar_Thesis.pdf.
Full textCrambes, Christophe. "Modèles de régression linéaire pour variables explicatives fonctionnelles." Phd thesis, Université Paul Sabatier - Toulouse III, 2006. http://tel.archives-ouvertes.fr/tel-00134003.
Full textSignorelli, Shirley Ferreira. "Um ambiente virtual para o ensino semipresencial de funções de uma variável real: design e análise." Pontifícia Universidade Católica de São Paulo, 2007. https://tede2.pucsp.br/handle/handle/11284.
Full textCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
The purpose of this investigation was the elaboration and implementation of a virtual environment for a part time distance course for students of the Computer Science and Systems of Information. The students failed in a former discipline that approaches topics of elementary Mathematics. It happened in a particular university in the city of São Paulo. Our focus was on analyzing this environment, the tools and interactions that happened on distance mode, about the content of real function of one variable. The methodology used, design-based research, favored proposing and analyzing the activities about this topic, as well as their reorganization and, the re design of the environment. The Blackboard platform and the used tools were analyzed based on Chaves (2000) criteria, and it seemed efficient as a virtual environment for the learning in our course. However, we leaved some critical and suggestions for future works, mainly about the role of the tools for communication within part time distance courses. The analysis of the students and teacher speeches' was based on the Model of Argumentative Strategy (CASTRO et al, 2004) and allowed to raise some aspects on the understanding of Real Functions of one variable, as they were privileged in the different interactive spaces such as forum, chat, email and daily log. Aspects like the meaning production in Mathematics can be produced due to the authority of a teacher or of another student who is considered good by the classroom peers, or based on everyday language usage or on cultural characteristics. Moreover, we found that besides the students lack of prerequisite elementary mathematics, there is a lack of a culture for on-line courses
Nesta pesquisa objetivamos a elaboração e implementação de um ambiente virtual para um curso semipresencial, para estudantes dos cursos de Bacharelado em Ciência da Computação e Sistemas de Informação de uma instituição particular na cidade de São Paulo, dependentes na disciplina que aborda tópicos de pré-calculo. Nosso foco recaiu na análise do ambiente, da viabilidade das ferramentas e das interações que ocorreram a distância, no que tange o conteúdo de Funções de uma Variável Real. A metodologia utilizada, design research, permitiu propor e analisar as atividades sobre este tópico, incluindo a reestruturação e complementação deste ambiente. A plataforma Blackboard e as ferramentas foram analisadas segundo critérios definidos por Chaves (2000) e se mostraram eficazes como ambiente virtual de aprendizagem atendendo, para nosso curso, os critérios necessários. Entretanto, deixamos algumas críticas e sugestões para trabalhos futuros, principalmente quanto o papel do uso de ferramentas de comunicação em cursos semipresenciais. A análise dos discursos dos alunos e docente baseados no Modelo de Estratégia Argumentativa (CASTRO et al, 2004) permitiu levantar alguns aspectos sobre a compreensão de Funções de uma Variável Real que foram privilegiados nos diferentes espaços interativos como fórum, chat, e-mail e diário de rotina, tais como o fato de que a produção de significados em Matemática pode estar apoiada na autoridade do professor ou alunos bem vistos pela classe, na linguagem cotidiana e no aspecto cultural. Observamos ainda que além da falta de pré-requisitos de matemática básica, ainda há falta de cultura de trabalhos on-line
Hunt, Julian David. "Integration of rationale management with multi-criteria decision analysis, probabilistic forecasting and semantics : application to the UK energy sector." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:2cc24d23-3e93-42e0-bb7a-6e39a65d7425.
Full textBensedik, Ahmed. "Sur quelques problèmes elliptiques de type Kirchhoff et dynamique des fluides." Phd thesis, Université Jean Monnet - Saint-Etienne, 2012. http://tel.archives-ouvertes.fr/tel-00971279.
Full textSARFATTI, GIULIA. "Elements of function theory in the unit ball of quaternions." Doctoral thesis, 2013. http://hdl.handle.net/2158/806320.
Full textGabrielli, Andrea. "Defining, calculating and reasoning in Higher-Order Logic: Complex and Hypercomplex Analysis and applications." Doctoral thesis, 2018. http://hdl.handle.net/2158/1160982.
Full textSTOPPATO, CATERINA. "Regular functions of one quaternionic variable." Doctoral thesis, 2010. http://hdl.handle.net/2158/1034111.
Full textЛитвин, О. М., О. Г. Литвин, and О. О. Литвин. "Method of Calculating Fourier Coefficients of Three Variable Functions Using Tomogram." Thesis, 2019. http://openarchive.nure.ua/handle/document/9457.
Full textDAI, XIAN-GUAN, and 戴顯權. "A study on suppressed variable permutation and complementation transformations on boolean functions." Thesis, 1989. http://ndltd.ncl.edu.tw/handle/14534163069016445799.
Full textLin, Jang-Hung, and 林建宏. "Fuzzy Sliding Mode Controller Design With Variable Sliding Surface And Adjustable Membership Functions." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/79621800953037122373.
Full text大同工學院
電機工程研究所
87
In this thesis, a simple design method is applied to regulate the membership functions of fuzzy sliding mode controller for the control of second order system. On the other hand, we will apply a variable sliding surface to design the fuzzy sliding mode controller, instead of the fixed sliding surface, which has the robustness against parameter variations and extraneous disturbances. At first, a kind of experimental design method, called Taguchi’s method, is introduced. We can give each design factor of the membership functions three values and then find out the best combination of the values of all design factors that can come out the best performance under these selectable values. Therefore, we can regulate the membership functions by this method. Second, we will change the fixed parameter of sliding surface to time-varying one by Takagi-Sugeno fuzzy algorithm. This design method has better performance than the conventional method (with fixed parameter) in reaching time, and getting better performance even with parameter variation and extraneous disturbance. Finally, a hydraulic servo system is proposed to simulate. It is simulated by using four different combinations of the membership function values in order to contrast with the performance which simulates using the best combination of the membership function values by our proposed fuzzy sliding mode controller.
"Students' Ways of Thinking about Two-Variable Functions and Rate of Change in Space." Doctoral diss., 2012. http://hdl.handle.net/2286/R.I.14562.
Full textDissertation/Thesis
Ph.D. Mathematics 2012
Belock, Julie. "Random variable dilation equations in R[superscript d] and the stability of scaling functions /." Diss., 1998. 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:9914424.
Full textMedalha, Samuel João Baltazar. "Algebras of Convolution Type Operators on Weighted Variable Lebesgue Spaces." Master's thesis, 2021. http://hdl.handle.net/10362/135865.
Full textProvamos uma versão do teorema de interpolação de Riesz-Thorin para alguns tipos de espaços de Lebesgue com expoente variável e peso. De forma a atingir este objectivo, usamos a teoria desenvolvida por Calderón no seu artigo de 1964. Usando a versão do teorema de Riesz-Thorin obtida, provamos uma versão da desigualdade de Stechkin para espaços de Lebesgue com expoente variável e peso. Isto permite-nos definir álgebras de multiplicadores de Fourier associados a funções de variação limitada. Após analisada a invertibilidade dos operadores de convolução com símbolos contínuos por troços, deslocamos a nossa atenção para multiplicadores de Fourier fracamente oscilantes. Terminamos com a prova de que a imagem na álgebra de Calkin da álgebra de operadores tipo convolução com dados fracamente oscilantes é comutativa.
Wu, Meng-Shiun, and 吳孟訓. "Exploring the Antecedents of Mentoring Functions and Their Effects on Proteges Job-Related Output─Role Stress as the Mediating Variable." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/67164151059802949695.
Full text國立屏東科技大學
企業管理系所
97
As human and intellectual capital have become more essential to organizational effectiveness and competitive advantages under the challenging environment, mentoring programs have become an important means to accelerate the protégé’s socialization and learning process. This strategic issue has received an increasing attentions in academy and practitioners. Although, the previous literatures have expanded our insights on this field, many theorists and researchers recommend that an integrated framework should be empirically examined to have a broader and deeper understanding. This study will try to construct a more integrated framework, in which the causal linkage structure within the variables of mentoring functions, their antecedents (which include mentor’s characteristics and protégé’s negative experience), the mediating effect of role stress and protégé’s job related outputs will be explored. The statistical method of LISREL will be adopted in this part. This study is an empirical research. Structured questionnaires will be designed for mentor and protégé respondent respectively from two different sources: adult students enrolled in a master’s of management programme in universities. After a clear definition of mentor program is given, qualified respondents will be drawn. The questionnaires will be given on the spot and should be returned by attached posted mail before deadline. The result of this study conclusions indicate that (1) the mentor’s leadership, motivation, expect benefit, social psychology has positive to impact on mentoring function. (2) protégé's negative mentoring experiences has negative to impact on mentoring function. (3) mentoring function has negative to impact on role stress. (4) work output has negative to impact on role stress.
Tang, Ming-Jmeng, and 唐明正. "The impact of mentoring functions on job performance using learning performance as an intermediary variable: The moderating effect of self-efficacy." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/14066153682101308585.
Full text國立屏東科技大學
資訊管理系所
100
In recent years, research on learning performance of mentoring functions calls attentions from the academic and the practice. Related research on mentoring functions including vocational supports, psychosocial supports, and role modeling on job performance has been widely discussed. However, research on the impact of mentoring functions on job performance using learning performance as an intermediary variable and self-efficacy as a moderator has not been found in related research. Based on the above discussion, this research develops a framework that uses learning performance as an intermediary variable and self-efficacy as a moderating variable to investigate the influences of mentoring functions on job performance. A survey of 547 respondents chosen from vocational soldiers of a military training center located in southern Taiwan. The findings of this research are shown as follows: (1) the impact of mentoring functions on learning performance: (a) vocational supports has insignificant influence on related job learning and individual technical development; (b) psychosocial supports and role modeling has significant influence on related job learning and individual technical development. (2) the impact of mentoring functions on job performance: (a) vocational supports has insignificant influence on work efficiency and work quality; (b) psychosocial supports and role modeling has significant influence on work efficiency, but has insignificant influence on work quality. (3) the impact of learning performance on job performance: (a) related job learning has insignificant influence on work efficiency and work quality; (b) individual technical development has significant influence on work efficiency and work quality. Based on the results of research, it is suggested that persons in charge of training centers shall strength the psychosocial supports, and role modeling of mentoring functions to improve job performance through the learning performance of individual technical development. Furthermore, the findings of this research include self-efficacy has moderating effects of the mentoring functions on learning performance, self-efficacy has moderating effects of the learning performance on job performance, and self-efficacy does not have moderating effects of the mentoring functions on job performance. Based on the findings of this research, it is suggested that persons in charge of military training centers shall adopt proper learning method to train the learners according to the learner’s level of individual self-efficacy. In summary, the research findings mentioned above can provide useful suggestions for military training centers in carrying out training activities and references for making an important decision.
CHANG, YA-LING, and 張雅苓. "The effect of mentoring functions on innovative behaviors of R&D engineers of new high-tech companies – Knowledge sharing as a mediating variable." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/r6vw9q.
Full text國立臺北科技大學
技術及職業教育研究所
107
In the era of knowledge economy, high-tech innovative companies have become important indexes and projects of future national development. These industries have to ensure the competitive advantage and sustainable development, which lie on the function of mentoring in the company, employee innovation behavior, knowledge sharing and other factors. The mentioned core abilities can effectively promote the growth of organization through communication and coordination. The purpose of this study is to investigate the correlation between mentoring function and employee innovation behavior, as well as the mediating effect of knowledge sharing. The research adopts an investigation method to the employees in those companies which were listed at stock exchange market for the first time, at over-the-counter market and at emerging stock market during March 2014 to September 2017 in Taiwan stock market. 1970 questionnaries were issued and 202 valid questionnaries were collected. After analyzing the received data, the results are showed as follows:1.The employees’ perception of mentoring function in occupation and role model is good, but that in society support is just passable.2.The employees’ perception of knowledge sharing in offering and acquiring knowledge is good.3.The employees’ perception of innovation behavior is good.4.Society support and role model in mentoring function have a significant positive influence on the employees’ innovation behavior; occupation function has a significant negative influence.5.Occupation and role model in mentoring function have a significant positive influence on the employees’ knowledge sharing.6.The employees’ knowledge acquiring ability has a significant positive influence on innovation behavior.7.The employees’ knowledge sharing has a mediating effects between mentoring function and innovation behavior.Finally, this thesis proposes the conclusion of the study and the practice meaning based on the research results, and the suggestion to future studies.
Bartel, Joseph. "A study on the effects of multicollinearity, autocorrelation and four sampling designs on the predictive ability of the 1994 and 1995 variable-exponent taper functions." Thesis, 1999. http://hdl.handle.net/2429/9003.
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