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An Efficient ADI-FDTD Scheme for Processing Lumped Multi-port DevicesLin, Zheng-Hong 03 September 2007 (has links)
When the conventional FDTD method is applied to the high-frequency planar circuits, the time step must be very small due to the CFL stability criterion since the structural details of the circuits are usually very small. These results in a prohibitively high computation time since the simulation takes a long time to stabilize. This thesis will focus on implementing an ADI-FDTD algorithm suitable for the analysis and simulation of large-scale high-frequency planar circuits. Realization of the lumped elements befitting the ADI-FDTD algorithm will be developed. Furthermore, active devices will then be incorporated into the algorithm once the models for lumped elements are built up.
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Software livre em perspectiva: uma análise a partir da ADI nº 3.059/RSPontes, Henrique Vieira January 2013 (has links)
Submitted by Haia Cristina Rebouças de Almeida (haia.almeida@uniceub.br) on 2015-03-05T18:22:59Z
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61000983.pdf: 855015 bytes, checksum: 00053dd43b4d680f1e8c1e4311939625 (MD5) / Informatização de processos e procedimentos, digitalização de documentos, utilização de
recursos de videoconferência, serviços de atendimento via internet, diversas são as
iniciativas de modernização da máquina estatal relacionadas à utilização de tecnologia. Em
alguma extensão, todos esses esforços estão voltados à melhoria da gestão pública,
buscando conferir maior agilidade e eficiência aos serviços prestados pelo Estado. Este
trabalho investiga uma das medidas que vem sendo recentemente adotadas neste mesmo
contexto: a utilização de software livre. Mais especificamente, a estipulação de preferência
pelo software livre nas contratações realizadas pelo Estado. Para desenvolver o tema, a
ADI n. 3.059/RS é analisada. Trata-se de ação proposta por partido político, que busca a
declaração da inconstitucionalidade da Lei n. 11.871/2002, expedida pelo Estado do Rio
Grande do Sul. Essa lei prevê justamente a preferência pelo software livre nas licitações
conduzidas pela Administração Pública local. Sob um enfoque que enxerga essa
preferência como uma política pública, a ADI é analisada com o fim de se extrair os
questionamentos jurídicos que a preferência pelo software livre suscita, ressaltando os
limites da apreciação judicial e destacando a sua íntima relação com o direito de
propriedade intelectual.
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Petits textes apologétiques /Yaḥyā ibn Ádī, Abū Zakarīyā' al-Manṭiqī, Périer, Augustin, January 1920 (has links)
Th. compl.--Lettr.--Paris--Fac. lettr., 1920. / Mention parallèle de titre ou de responsabilité : Maqālāt / li-Yaḥyā ibn ʻAdī.
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Software livre em perspectiva: uma análise a partir da ADI nº 3.059/RSPontes, Henrique Vieira January 2013 (has links)
Submitted by Haia Cristina Rebouças de Almeida (haia.almeida@uniceub.br) on 2015-03-05T18:22:59Z
No. of bitstreams: 1
61000983.pdf: 855015 bytes, checksum: 00053dd43b4d680f1e8c1e4311939625 (MD5) / Made available in DSpace on 2015-03-05T18:22:59Z (GMT). No. of bitstreams: 1
61000983.pdf: 855015 bytes, checksum: 00053dd43b4d680f1e8c1e4311939625 (MD5) / Informatização de processos e procedimentos, digitalização de documentos, utilização de
recursos de videoconferência, serviços de atendimento via internet, diversas são as
iniciativas de modernização da máquina estatal relacionadas à utilização de tecnologia. Em
alguma extensão, todos esses esforços estão voltados à melhoria da gestão pública,
buscando conferir maior agilidade e eficiência aos serviços prestados pelo Estado. Este
trabalho investiga uma das medidas que vem sendo recentemente adotadas neste mesmo
contexto: a utilização de software livre. Mais especificamente, a estipulação de preferência
pelo software livre nas contratações realizadas pelo Estado. Para desenvolver o tema, a
ADI n. 3.059/RS é analisada. Trata-se de ação proposta por partido político, que busca a
declaração da inconstitucionalidade da Lei n. 11.871/2002, expedida pelo Estado do Rio
Grande do Sul. Essa lei prevê justamente a preferência pelo software livre nas licitações
conduzidas pela Administração Pública local. Sob um enfoque que enxerga essa
preferência como uma política pública, a ADI é analisada com o fim de se extrair os
questionamentos jurídicos que a preferência pelo software livre suscita, ressaltando os
limites da apreciação judicial e destacando a sua íntima relação com o direito de
propriedade intelectual.
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Minimisation d'énergie sous contraintes : applications en algèbre linéaire et en contrôle linéaire / Energy minimisation under constraints : application to linear algebra and linear controlGryson, Alexis 01 July 2009 (has links)
Le problème de Zolotarev pour des ensembles discrets apparaît pour décrire le taux de convergence de la méthode ADI, dans l’approximation de certaines fonctions matricielles ou encore pour quantifier le taux de décroissance des valeurs singulières de certaines matrices structurées. De plus, la réduction de modèle constitue un enjeu important en théorie du contrôle linéaire, et on peut prédire la qualité de l’approximation d’un système dynamique linéaire continu stationnaire de grande dimension donné grâce à la résolution approchée d’une équation de Sylvester. Après avoir prouvé l’existence d’un minimiseur pour le troisième problème de Zolotarev pour des ensembles discrets, on détermine dans cette thèse le comportement asymptotique faible de ce problème sous certaines hypothèses de régularité. Pour mener cette étude, on considère un problème de minimisation d’énergie sous contraintes pour des mesures signées en théorie du potentiel logarithmique.On discute également la précision de nos résultats asymptotiques pour des ensembles discrets généraux du plan complexe, et une formule intégrale explicite est établie dans le cas particulier de deux sous-ensembles discrets de l’axe réel symétriques par rapport à l’origine. L’impact de nos résultats théoriques pour l’analyse du taux de convergence de la méthode ADI appliquée pour la résolution approchée d’une équation de Lyapounov est estimé à l’aide de plusieurs exemples numériques après avoir exposé l’algorithme nous permettant d’obtenir les paramètres utilisés. Mots clés : Théorie du potentiel / The Zolotarev problem with respect to discrete sets arises naturally to describe both the convergence rate of the ADI method, to compute approximation of various functions of matrices and to quantify the decreasing rate of singular values of structured matrices. Moreover, the theory of model reduction is a key problem in linear control theory, and the quality of the approximation of continuous stationnary linear dynamical system might be predicted with the computation of the solution of a Sylvester equation. Once proved the existence of a minimizer for the third Zolotarev problem with respect to discrete sets, we give the weak asymptotic behaviour of the Zolotarev quantity under some regularity hypothesis. In this purpose, we introduce a problem of energy minimization with constraints in logarithmic potential theory with respect to signed measures. We discuss the accuracy of our results for general discrete sets in the complex plane, and we prove an explicit integral formula in the particular case of two discret subsets of the real axis symmetric with respect to the imaginary axis. Then, the impact of our theoretical results concerning the analysis of the convergence rate of the ADI method applied to solve a Sylvester equation is estimated with various numerical examples after the description of the algorithm which we used to compute the parameters.
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Computational Electromagnetics for Radar Signature Reduction of Aerial VehiclesLim, Kheng-Hwee January 2020 (has links)
No description available.
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A Web-Based High Performance Simulation System for Transport and Retention of Dissolved Contaminants in SoilsZeng, Honghai 03 August 2002 (has links)
Groundwater, the major source of human drinking water, is susceptible to contamination from industrial and agricultural activities. This research develops a web-based simulation system of remote high performance computing model for contaminant transport and retention in soils. A three-dimensional advection-dispersion-reaction MRTM model, based on previous experimental and theoretical studies, is proposed to analyze the transport and retention of chemical contaminants in groundwater flowing through soils. Since three-dimensional experiments are difficult to implement and verify, this simulation system provides scientists an alternative to trace the contaminant movement in soils outside laboratories. The alternating direction implicit (ADI) algorithm is used in this study to reduce the computational complexity. Although the ADI method is very efficient to solve the governing advection-dispersionsorption equations in the three-dimensional MRTM model, achieving higher order accuracy with different boundary conditions remains a difficult research topic. This research develops a new numerical scheme to achieve second-order accuracy with the Neumann-type boundary conditions. Furthermore, parallel computing is used to achieve high performance using powerful multiprocessor computers. A web-based simulation system provides users a friendly interface for remote access to the system through Internet browsers, so as to utilize remote computing resources transparently and efficiently. In the client-side computing one-dimensional MRTM simulation system, the legacy code written in FORTRAN and C are wrapped and reused with Java code, which provides the web-based graphic user interface (GUI). The server-side computing three-dimensional MRTM simulation system integrates the remote high performance computing resources, database management systems, online visualization functionality, and web-based userriendly GUIs. Given access to the Internet, users can execute and manage remote high performance computing jobs anywhere anytime, even through a web browser from a laptop personal computer.
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Interakce učitele a žáka ve skupinové formě při výuce lyžování / Interaction between a teacher and a student in the group-form method of teaching skiingJedličková, Eva January 2011 (has links)
Title: Interaction between a teacher and a student in the group-form method of teaching skiing Objectives: The aim of this thesis is to compare the interaction between the teacher and the student in the process of teachig skiing in the foreign ski schools. Methods: In our thesis we used the method of observation with utilization of categorial system according to the standardized method MADI (modificated analysis of didactic interaction). This method involves seven categories describing forms of behaviour of a teacher, didactic content of training, didactic situation and the postural activity. Results: The teachers' profiles were proved to be different, which was caused primarily by the amount of experience and partially by the gained education. The results showed that the main differences were manifested at the teacher number three who gained the shortest practices. This teacher diametrically differs in all examined categories from other teachers. Between the other two teachers there were found differences as well, but not essential. The teacher number three commited many didactitc faults. Some of his forms of behaviour, demonstration and action were not coherent with the process of learning so that they were not able to be analysed. Keywords: ADI, MADI, ski school, ski education
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O direito à educação na hermenêutica judicial: análise do processo e julgamento da ação direta de inconstitucionalidade n. 4.167, que versou sobre o piso salarial dos professores do ensino público básicoMizuki, Bruna 31 October 2013 (has links)
Submitted by Haia Cristina Rebouças de Almeida (haia.almeida@uniceub.br) on 2015-03-05T18:13:32Z
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61000139.pdf: 989952 bytes, checksum: 0f0391dd5aab8272ae0fc905fcc9ff8b (MD5) / Esta dissertação tem por objeto a análise do julgamento da ADI n. 4167. Como
metodologia, o relato desta análise, em três capítulos, lida com pressupostos que
fundamentam o compromisso com os valores e a coerência, deixando implícito que todo
conhecimento crítico indaga e questiona suas possibilidades e seus limites. Portanto, é no
campo da hermenêutica que se desenvolve a pesquisa. Discutem-se as decorrências e os
parâmetros atuais do debate, a respeito das distinções envolvendo regras, princípios e
postulados. Uma discussão histórica e conceitual sobre o Estado Federal Brasileiro, presente
no primeiro capítulo, concentra as discussões na dinâmica federativa recente, iniciada com a
Constituição de 1988, embasada nos teóricos: Silva (2009), Bonavides (2008), Ferreira Filho
(2010) e Bernardes (2010), entre outros. Objetiva apresentar os principais textos normativos
que tratam do federalismo educacional, no Brasil, e verificar as condições gerais que
delimitaram a atividade interpretativa dos magistrados, ao proferir a decisão na ADI 4167. No
segundo capítulo, Kelsen (2009) e Ross (2007) argumentam que, a despeito de haver critérios
ou não, a decisão final seria tão somente a expressão de um ato político e de vontade,
embasados em processos cognoscitivos. E o ordenamento jurídico seria apenas um pretexto.
Coelho (2011), Larenz (1997) e Perelman (2004) mantêm o foco na observância ao devido
processo legal, na consciência jurídica geral, e no respeito aos precedentes e à Constituição.
Foram contemplados ainda os teóricos Dworkin (2007), Alexy (2008), Ávila (2004) e Neves
(2013). No terceiro capítulo, um estudo anatômico do processo e julgamento da ADI
analisada aponta as principais consequências políticas e normativas, para descobrir se a
decisão está em conformidade com o texto constitucional, ou este foi suplantado em prol da
melhoria da qualidade da educação. O tema proposto permite enriquecer o diálogo sobre os
magistrados e suas decisões. Será que o ordenamento jurídico tem sido priorizado?
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The Analysis and Simulation of compact-sized AntennasLin, Gang-Yi 21 July 2003 (has links)
In recent years, the demand for portable radio communication has been increasing which requires low profile, light weight and small size antennas. Therefore, the size of the antenna is required to be as small as possible. In this thesis, some of the compact antennas will be analyzed and simulated. The early-stage PIFA antenna will be investigated first, and then the shorting pin characteristics to design compact and dual band antenna was utilized. Because the shorting pin will lead to the decrease of bandwidth, replacement of the shorting pin by using chip-resistor could improve this characteristic. The compactness of antennas will lead to the decrease of the gain. In order to improve the gain of antennas, the combination of substrate and superstrate configuration with very high permittivity material is used.
For the consideration of Bluetooth system, we use the ACPS (Asymmetrical Co-planar Striplines) structure to design the antenna. Using this structure in the design will obtain a promotion in bandwidth compared with the conventional rectangular microstrip antenna.
Because the size of the antenna is small, the time to simulate this structure by the FDTD (Finite Difference Time Domain) method is too long. In order to solve this problem, this thesis mainly study a new FDTD algorithm based on the Alternating-Direction Implicit method, and use this algorithm to simulate some simple structures.
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