Дисертації з теми "Ordered Transmissions"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Ordered Transmissions".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Brungart, Douglas S. (Douglas Scott) 1972. "Distance information transmission using first order reflections." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/32623.
Повний текст джерелаIncludes bibliographical references (p. 114-116).
by Douglas S. Brungart.
M.S.
Harutjunjan, G., and Bert-Wolfgang Schulze. "Reduction of orders in boundary value problems without the transmission property." Universität Potsdam, 2002. http://opus.kobv.de/ubp/volltexte/2008/2622/.
Повний текст джерелаGraham, David W. "Continuous-time bandpass second-order sections and their applications in cochlea modeling." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/14872.
Повний текст джерелаRawat, Vineet. "Finite Element Domain Decomposition with Second Order Transmission Conditions for Time-Harmonic Electromagnetic Problems." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243360543.
Повний текст джерелаTrimble, Mark Herbert 1958. "EFFECTS OF ELECTRICAL STIMULATION ON THE RECRUITMENT ORDER OF MOTOR UNITS IN MAN: INDIRECT EXAMINATION BY ELECTRICALLY EVOKED MUSCLE RESPONSES." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276555.
Повний текст джерелаKowalski, Elizabeth J. (Elizabeth Joan). "Miter bend loss and higher order mode content measurements in overmoded millimeter-wave transmission lines." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/62444.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 119-121).
High power applications require an accurate calculation of the losses on overmoded corrugated cylindrical transmission lines. Previous assessments of power loss on these lines have not considered beam polarization or higher order mode effects. This thesis will develop a theory of transmission that includes the effect of linearly polarized higher order modes on power loss in overmoded corrugated transmission line systems. This thesis derives the linearly polarized basis set of modes for corrugated cylindrical waveguides. These modes are used to quantify the loss in overmoded transmission line components, such as a gap in waveguide or a 900 miter bend. The dependence of the loss in the fundamental mode on the phase of higher order modes (HOMs) was investigated. In addition, the propagation of a multi-mode beam after the waveguide was quantified, and it was shown that if two modes with azimuthal (m) indices that differ by one propagate in the waveguide, the resultant centroid and the tilt angle of radiation at the guide end are related through a constant of the motion. These theoretical calculations are useful for high-power applications, such as the electron cyclotron heating in plasma fusion reactors. In addition, this thesis develops a low-power S-Parameter Response (SPR) technique to accurately measure the loss in ultra-low loss overmoded waveguide components. This technique is used to measure the loss of components manufactured to ITER (an experimental fusion reactor) specifications, operated at 170 GHz with a diameter of 63.5 mm and quarter-wavelength corrugations. The loss in a miter bend was found to be 0.022+0.08 dB. This measurement is in good agreement with theory, which predicts 0.027 dB loss per miter bend, and past measurements [18]. The SPR was used to measure the loss in a gap of waveguide and the results were in good agreement with the well-established theoretical loss due to gap, which demonstrates the accuracy of the SPR technique. For both of these measurements, a baseline analysis determined the effects of a small percentage (1-2%) of higher order modes in the system.
by Elizabeth J. Kowalski.
S.M.
Shi, Ruirong. "Zeroth-Order Resonator (ZOR) Antenna Using Composite Right/Left-Handed (CRLH ) Microstrip Transmission Line (TL)." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1301714086.
Повний текст джерелаPetrova, Rumyana. "Quantitative High-Angle Annular Dark Field Scanning Transmission to Electron Microscopy for Materials Science." Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4304.
Повний текст джерелаPh.D.
Department of Physics
Sciences
Physics
Mahdi, Hashim Salman. "Analysis of unsteady heat transfer by natural convection in a two-dimensional square cavity using a high order finite-volume method." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184719.
Повний текст джерелаChen, Yuan. "A Fast, Passive and Accurate Model Generation Algorithm for RLCG Transmission Lines with Skin Effects." University of Cincinnati / OhioLINK, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1116250638.
Повний текст джерелаCloete, Alrese. "Birth order, delivery and concordance of mother-to-child transmission of Human Immunodeficiency Virus in twin pregnancies." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/3040.
Повний текст джерелаIncludes bibliographical references.
Despite two decades of studies of mother to child transmission of HIV, very little data is available regarding vertical transmission in twin pregnancies. There is uncertainty whether discordance of HIV transmission exists between the first born (Twin A) and second born (Twin B) infant. Primary aim of the study was to examine if there is any discordance of HIV transmission in twin pregnancies when comparing Twin A to Twin B. Secondary objectives were to identify possible additional risk factors for HIV transmission in twin pregnancies. We assessed antenatal care, antiretroviral therapy, birth order, delivery route and feeding options as risk factors for mother to child transmission of HIV in twin pregnancies.
Wouters, Charlotte. "Impact of order and disorder on phase formation in (InxGa1-x)2O3 investigated by transmission electron microscopy." Doctoral thesis, Humboldt-Universität zu Berlin, 2021. http://dx.doi.org/10.18452/22883.
Повний текст джерелаWe investigate the phase formation in (InxGa1-x)2O3 solid solutions experimentally by means of transmission electron microscopy (TEM) and with computational support using cluster expansion. In the case of epitaxial growth on crystalline substrates, we find strong ordering on the cation sublattices of (InxGa1-x)2O3, energetically driven by the tendency of In and Ga to each assume their preferred coordination environment. Based on this experimental finding, we modify the model of the ideal mixture by considering the configurational entropy on the respective cation sublattices with different coordination separately in order to calculate it realistically. The resulting phase diagram is characterized by narrow thermodynamically stable ranges for each phase, while wide composition ranges of metastable compounds are predicted, which can be achieved at temperatures typical for epitaxy: the monoclinic phase is metastable in the composition range x<0.5, the hexagonal phase for 0.55
Clarkson, Rebecca. "Singing With the New Order Amish: How Their Current Musical Practices Reflect Their Culture and History." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1352993454.
Повний текст джерелаBILAL, SYED MUHAMMAD. "Design of Ad-Hoc Algorithms for Performance Optimization of High-Order Modulation Formats in Coherent Optical Transmission Systems." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2592676.
Повний текст джерелаWouters, Charlotte [Verfasser]. "Impact of order and disorder on phase formation in (InxGa1-x)2O3 investigated by transmission electron microscopy / Charlotte Wouters." Berlin : Humboldt-Universität zu Berlin, 2021. http://d-nb.info/1234451131/34.
Повний текст джерелаGupta, Sanjeev. "Higher order approximation for combined mode heat transfer in building insulations." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43751.
Повний текст джерелаFor heat transfer through building insulations such as fiberglass, radiation and conduction are important modes of heat transfer. Moreover, materials like fiberglass scatter radiation in a highly anisotropic manner. The equations for heat transfer by simultaneous conduction and radiation are a coupled pair, one of which is of the nonlinear integrodifferential type. Exact solution for transient heat transfer in this case is not available, and the approximate solution available is the two-flux model. The two-flux model does not give good results for transient, combined mode heat transfer, through an absorbing, emitting, and anisotropically scattering medium. In this thesis a higher order approximate solution has been developed. It is found that this model gives appreciably better results than the two-flux model.
Master of Science
Nteka, Makhetsi Flora. "Development and assessment of reduced order power system models." Thesis, Cape Peninsula University of Technology, 2013. http://hdl.handle.net/20.500.11838/1088.
Повний текст джерелаThe demand for electrical energy has kept on increasing, thus causing power systems to be more complex and bringing the challenging problems of electrical energy generation, transmission, stability, as well as storage to be examined more thoroughly. With the advent of high-speed computation and the desire to analyze increasingly complex behaviour in power systems, simulation techniques are gaining importance and prevalence. Nevertheless, while simulations of large, interconnected complex power systems are feasible, they remain time-consuming. Moreover, the models and parameters used in simulations are uncertain, due to measurement uncertainty, the need to represent a complex behaviour with low-order models, and the inherent changing nature of the power system. This research explores the use of a model reduction technique and the applications of a Real-Time Digital Simulator (RTDS) to reduce the uncertainty in large-scale complex power system models. The main goal of the research is to develop a reduced order model and to investigate the applications of the RTDS simulator in reduction of large, interconnected power systems models. The first stage of the study is to build and simulate the full model of the power system using the DigSILENT and RTDS simulators. The second phase is to apply model reduction technique to the full model and to determine the parameters in the reduced-order model as well as how the process of reduction increases this model uncertainty. In the third phase the results of the model reduction technique are compared based on the results of the original model - IEEE standard benchmark models has been used. The RTDS was used for comparative purposes. The thesis investigations use a particular model reduction technique as Coherency based Method. Though the method ideas are applicable more generally, a concrete demonstration of its principles is instructive and necessary. Further, while this particular technique is not relevant to every system, it does apply to a broad class of systems and illustrates the salient features of the proposed methodology. The results of the thesis can be used in the development of reduced models of complex power systems, simulation in real-time during power system operation, education at universities, and research. Keywords: IEEE benchmark models, reduced models, Coherency based Method, DigSILENT, RTDS, model uncertainty, power system stability
Malik, Muhammad Haris. "Reduced order modeling for smart grids' simulation and optimization." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/405730.
Повний текст джерелаCette these présente l'étude de la réduction de modeles pour les réseaux électriques et les réseaux de transmission. Un point de vue mathématique a été adopté pour la réduction de modeles. Les réseaux électriques sont des réseaux immenses et complexes, dont l'analyse et la conception nécessite la simulation et la résolution de grands modeles non-linéaires. Dans le cadre du développement de réseaux électriques intelligents (smart grids) avec une génération distribuée de puissance, l'analyse en temps réel de systemes complexes tels que ceux-ci nécessite des modeles rapides, fiables et précis. Dans la présente étude, nous proposons des méthodes de réduction de de modeles a la fois a priori et a posteriori, adaptées aux modeles dynamiques des réseaux électriques. Un accent particulier a été mis sur la dynamique transitoire des réseaux électriques, décrite par un modele oscillant nonlinéaire et complexe. La non-linéarité de ce modele nécessite une attention particuliere pour bénéficier du maximum d'avantages des techniques de réduction de modeles. lnitialement, des méthodes comme POD et LATIN ont été adoptées avec des degrés de succes divers. La méthode de TPWL, qui combine la POD avec des approximations linéaires multiples, a été prouvée comme étant la méthode de réduction de modeles la mieux adaptée pour le modele dynamique oscillant. Pour les lignes de transmission, un modele de parametres distribués en domaine fréquentiel est utilisé. Des modeles réduits de type PGD sont proposés pour le modele DP des lignes de transmission. Un probleme multidimensionnel entierement paramétrique a été formulé, avec les parametres électriques des lignes de transmission inclus comme coordonnées additionnelles de la représentation séparée. La méthode a été étendue pour étudier la solution du modele des lignes de transmission pour laquelle les parametres dépendent de la fréquence.
Esta tesis presenta un estudio de la reducción de modelos (MOR) para redes de transmisión y distribución de electricidad. El enfoque principal utilizado ha sido la dinámica transitoria y para la reducción de modelos se ha adoptado un punto de vista matemático. Las redes eléctricas son complejas y tienen un tamaño importante. Por lo tanto, el análisis y diseño de este tipo de redes mediante la simulación numérica, requiere la resolución de modelos no-lineales complejos. En el contexto del desarrollo de redes inteligentes, el objetivo es un análisis en tiempo real de sistemas complejos, por lo que son necesarios modelos rápidos, fiables y precisos. En el presente estudio se proponen diferentes métodos de reducción de modelos, tanto a priori como a posteriori, adecuados para modelos dinámicos de redes eléctricas. La dinámica transitoria de redes eléctricas, se describe mediante modelos dinámicos oscilatorios no-lineales. Esta no-linearidad del modelo necesita ser bien tratada para obtener el máximo beneficio de las técnicas de reducción de modelos. Métodos como la POD y la LATIN han sido inicialmente utilizados en esta problemática con diferentes grados de éxito. El método de TPWL, que combina la POD con múltiples aproximaciones lineales, ha resultado ser el mas adecuado para sistemas dinámicos oscilatorios. En el caso de las redes de transmisión eléctrica, se utiliza un modelo de parámetros distribuidos en el dominio de la frecuencia. Se propone reducir este modelo basándose en la PGD, donde los parámetros eléctricos de la red de transmisión son incluidos como coordenadas de la representación separada del modelo paramétrico. Este método es ampliado para representar la solución de modelos con parámetros dependientes de la frecuencia para las redes de transmisión eléctrica
Mishra, Kirti D. "Robust Nonlinear Estimation and Control of Clutch-to-Clutch Shifts." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1452184768.
Повний текст джерелаPasha, Soheila. "Electromagnetic Modeling of High-Speed Interconnects with Frequency Dependent Conductor Losses, Compatible with Passive Model Order Reduction Techniques." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/268354.
Повний текст джерелаNie, Qihong. "Experimentally validated multiscale thermal modeling of electronic cabinets." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/26492.
Повний текст джерелаCommittee Chair: Joshi, Yogendra; Committee Member: Gallivan, Martha; Committee Member: Graham, Samuel; Committee Member: Yeung, Pui-Kuen; Committee Member: Zhang, Zhuomin. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Carvalho, Janison Rodrigues de. "Estatísticas de ordem superior e redes neurais artificiais aplicadas à proteção digital de linhas de transmissão." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18154/tde-06052013-083525/.
Повний текст джерелаA novel method of Transmission Lines (TLs) protection is presented and discussed in this work. The proposed algorithm performs the traditional steps of distance relaying, such as: fault detection, classification and location. The new method applies the Higher Order Statistics (HOS), also known as cumulants, as a tool for feature extraction in order to apply Artificial Neural Networks (ANN) for pattern classification. These networks are responsible for the processing of information, identifying a possible fault condition, the type of fault and, finally, its location in terms of fault zones considered for the problem. The application of HOS in a protection scheme is responsible for the transformation of electrical data, such as current signals, to a different domain where the different types of faults are highlighted by different classes of samples. The available database was obtained by simulating an Electric Power System and it is used for computing the statistics and training/validating the distinct neural networks of each step of the distance protection. A relay prototype is obtained by combining these steps in a synchronized operation. This prototype allowed the execution of extensive tests, simulating the operation of a protective system in real-time. Despite the use of currents signals only, the proposed method provided efficient protection for the EPS under study. In fact, comparing the results with a traditional method applied to distance protection, based on apparent impedance, an improvement of the protection performance was demonstrated. Especially for faults involving one phase and the ground, the most common in power systems, the results of the new methodology was significantly superior to that of the conventional relay. It can be concluded that the technique presents a high relevance for applications in transmission line protection.
Tounsi, Bouchaïb. "Etude par microscopie en faisceau faible de la dissociation des dislocations dans Ni(3)Si : relation avec le comportement plastique." Poitiers, 1988. http://www.theses.fr/1988POIT2338.
Повний текст джерелаVaradarajan, Badri. "The Design of Linear Space-Time Codes for Quasi-static Flat-fading Channels." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/5030.
Повний текст джерелаRider, Flores Marcos Julio 1975. "Planejamento da expansão de sistemas de transmissão usando os modelos CC - CA e tecnicas de programação não-linear." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260508.
Повний текст джерелаTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
Made available in DSpace on 2018-08-06T06:56:43Z (GMT). No. of bitstreams: 1 RiderFlores_MarcosJulio_D.pdf: 1021887 bytes, checksum: 6000961c2f5457b410ac691912476270 (MD5) Previous issue date: 2006
Resumo: Neste trabalho são propostos modelos matemáticos e técnicas de solução para resolver o problema de planejamento da expansão de sistemas de transmissão através de três enfoques. a) Usando o modelo de corrente alternada do sistema de transmissão e um algoritmo heurístico construtivo especializado para resolver o problema de planejamento, e, ainda, realiza-se uma primeira tentativa de alocação de fontes de potência reativas; b) Usando o modelo de corrente contínua e técnicas de programação não-linear especializadas. Nesse caso emprega-se uma versão relaxada do problema de planejamento da expansão de sistemas de transmissão usando o modelo de corrente contínua, onde a integralidade das variáveis de investimento é desprezada. Resolve-se o problema de programação não-linear, modelado de forma matricial com um algoritmo de otimização especializado e, além disso, um algoritmo heurístico construtivo especializado é utilizado para resolver o problema de planejamento. c) Usando o modelo de corrente contínua e um algoritmo Branch and Bound (B&B) sem empregar técnicas de decomposição. Para isso foram redefinidos os chamados testes de sondagem no algoritmo B&B e em cada nó da árvore de B&B tem-se um problema de programação não-linear que são resolvidos usando a metodologia desenvolvida no item (b). Os ítens (a), (b) e (c) requerem a solução de problemas de programação não-linear diferenciados. Uma revisão das características principais da resolução iterativa dos métodos de pontos interiores é apresentada. Foi desenvolvida uma técnica baseada em uma combinação de métodos de pontos interiores de alta ordem (MPI-AO) para resolver os problemas de programação não-linear de forma rápida, eficiente e robusta. Essa combinação dos MPI-AO tem como objetivo colocar num único método as características particulares de cada um dos MPI-AO e melhorar o desempenho computacional comparado com os MPI-AO de forma individual
Abstract: In this work mathematical models and solution techniques are proposed to solve the power system transmission expansion planning problem through three approaches: a) Using the nonlinear model ofthe transmission system (AC model) and a specialized constructive heuristic algorithm to solve the problem and, yet, a first attempt to allocate reactive power sources is also considered; b) Using the direct-current (DC) model and specialized techniques of nonlinear programming. In this case a version of the power system transmission expansion planning problem using the DC model where the integrality of the investment variables is relaxed is used. The nonlinear programming problem is solved with a specialized optimization algorithm and, moreover, a constructive heuristic algorithm is employed to solve the planning problem. c) Using the DC model and Branch and Bound (B&B) algorithm without the use of decomposition techniques. The so called fathoming tests of the B&B were redefined and at each node of the tree a nonlinear programming problem is solved using the method developed in b). Items a), b) and c) require the solution of distinct problems of nonlinear programming. A revision of the main characteristics of the iterative solution of the interior points methods is presented. An optimization technique based on a combination of the higher order interior point methods (HO-IPM) had been developed to solve the nonlinear programming problems in a fast, efficient and robust way. This combination of the HO-IPM has as objective to explore the particular characteristics of each method in a single one and to improve the comparative computational performance with the HO-IPM of individual form
Doutorado
Energia Eletrica
Doutor em Engenharia Elétrica
Burel, Aliénor. "Contributions à la simulation numérique en élastodynamique : découplage des ondes P et S, modèles asymptotiques pour la traversée de couches minces." Phd thesis, Université Paris Sud - Paris XI, 2014. http://tel.archives-ouvertes.fr/tel-01060178.
Повний текст джерелаRoulin, Gilles. "Etude des premiers stades de mise en ordre dans les alliages martensitiques du système cuivre-aluminium." Rouen, 1997. http://www.theses.fr/1997ROUES085.
Повний текст джерелаLatroche, Michel. "Caracterisations physico-chimiques des bronzes de titane en relation avec leur stoechiometrie." Nantes, 1988. http://www.theses.fr/1988NANT2019.
Повний текст джерелаMaurandi, Victor. "Algorithmes pour la diagonalisation conjointe de tenseurs sans contrainte unitaire. Application à la séparation MIMO de sources de télécommunications numériques." Thesis, Toulon, 2015. http://www.theses.fr/2015TOUL0009/document.
Повний текст джерелаThis thesis develops joint diagonalization of matrices and third-order tensors methods for MIMO source separation in the field of digital telecommunications. After a state of the art, the motivations and the objectives are presented. Then the joint diagonalisation and the blind source separation issues are defined and a link between both fields is established. Thereafter, five Jacobi-like iterative algorithms based on an LU parameterization are developed. For each of them, we propose to derive the diagonalization matrix by optimizing an inverse criterion. Two ways are investigated : minimizing the criterion in a direct way or assuming that the elements from the considered set are almost diagonal. Regarding the parameters derivation, two strategies are implemented : one consists in estimating each parameter independently, the other consists in the independent derivation of couple of well-chosen parameters. Hence, we propose three algorithms for the joint diagonalization of symmetric complex matrices or hermitian ones. The first one relies on searching for the roots of the criterion derivative, the second one relies on a minor eigenvector research and the last one relies on a gradient descent method enhanced by computation of the optimal adaptation step. In the framework of joint diagonalization of symmetric, INDSCAL or non symmetric third-order tensors, we have developed two algorithms. For each of them, the parameters derivation is done by computing the roots of the considered criterion derivative. We also show the link between the joint diagonalization of a third-order tensor set and the canonical polyadic decomposition of a fourth-order tensor. We confront both methods through numerical simulations. The good behavior of the proposed algorithms is illustrated by means of computing simulations. Finally, they are applied to the source separation of digital telecommunication signals
Підгурська, Тетяна Вікторівна. "Двосмугові фільтри на діелектричних резонаторах з вищими типами коливань". Doctoral thesis, Київ, 2016. https://ela.kpi.ua/handle/123456789/15382.
Повний текст джерелаBortnik, Jacob. "Transmission line compaction using high phase order transmission." Thesis, 2016. http://hdl.handle.net/10539/20879.
Повний текст джерелаThis report discusses high phase order (HPO) technology, i.e. the use of more than the conventional 3 phases for transmission of electric power, its use in the compaction of lines, and power density maximization over existing servitudes. It is structured in four parts. The first part introduces the concepts, establishes the need, and lists the advantages ofHPO. The second part deals with the technology itself and shows that it is possible to analyze HPO systems using symmetrical component analysis, lists common transformer configurations, covers protection, and so on. The third part analyses 5 case studies, the first 3 being analytical, and the last 2 being the first experimental test line, and the world's :first utility application ofHPO lines. The fmal section is a South African case study and compares an HPO line to an existing 400 kV 3-phase line and shows that the former is 87.5% more expensive to implement than the latter. Comparing the 3-phase and 6-phase lines on a more even basis, yielded a breakeven distance of225.86 km, above which the 6-phase option becomes more economical. These results are then explained and discussed in the conclusions section.
"Deadline-ordered parallel iterative matching with QoS guarantee." 2000. http://library.cuhk.edu.hk/record=b5890379.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2000.
Includes bibliographical references (leaves 56-[59]).
Abstracts in English and Chinese.
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Thesis Overview --- p.3
Chapter 2 --- Background & Related work --- p.4
Chapter 2.1 --- Scheduling problem in ATM switch --- p.4
Chapter 2.2 --- Traffic Scheduling in output-buffered switch --- p.5
Chapter 2.3 --- Traffic Scheduling in Input buffered Switch --- p.16
Chapter 3 --- Deadline-ordered Parallel Iterative Matching (DLPIM) --- p.22
Chapter 3.1 --- Introduction --- p.22
Chapter 3.2 --- Switch model --- p.23
Chapter 3.3 --- Deadline-ordered Parallel Iterative Matching (DLPIM) --- p.24
Chapter 3.3.1 --- Motivation --- p.24
Chapter 3.3.2 --- Algorithm --- p.26
Chapter 3.3.3 --- An example of DLPIM --- p.28
Chapter 3.4 --- Simulation --- p.30
Chapter 4 --- DLPIM with static scheduling algorithm --- p.41
Chapter 4.1 --- Introduction --- p.41
Chapter 4.2 --- Static scheduling algorithm --- p.42
Chapter 4.3 --- DLPIM with static scheduling algorithm --- p.48
Chapter 4.4 --- An example of DLPIM with static scheduling algorithm --- p.50
Chapter 5 --- Conclusion --- p.54
Bibliography --- p.56
"Transmission System Restoration Strategies in Real Time." Doctoral diss., 2010. http://hdl.handle.net/2286/R.I.8701.
Повний текст джерелаDissertation/Thesis
Ph.D. Electrical Engineering 2010
Razib, Mohammad Yeasin. "Fractional Order Transmission Line Modeling and Parameter Identification." Master's thesis, 2010. http://hdl.handle.net/10048/1392.
Повний текст джерелаControls
Tsou, Shih-Min, and 鄒世民. "The Impact of Order Transmission in Distribution Channel by IT." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/55367659006230276174.
Повний текст джерелаHuang, Kuo-Feng, and 黃國峰. "Characteristics and Design of Broadside-Coupled Transmission Lines at Higher-Order." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/26273489720237612416.
Повний текст джерела國立交通大學
電信工程系
90
The aim of this work is two fold, 1) detailed description of the higher-order leaky modes of the much used broadside-coupled microstrips and 2) practical application of such leaky modes as an antenna. A representative broadside-coupled transmission line structure is examined to elucidate the detail of leakage effects at higher-order of multilayered, 3-D microwave and millimeter-wave circuits. Two-layered cases are analyzed from a physical perspective and the total number of first higher-order leaky modes is found to be equal to that of microstrips. The higher-order leakage effects of general multilayered broadside-coupled transmission lines are thoroughly investigated via the studies of the cases of three to five-layered broadside-coupled microstrips. Several significant conclusions can be derived from the details of the dispersion characteristics and modal current distributions of the higher-order leaky modes exist in the broadside-coupled microstrips. With the aim of the results found in this thesis, one can sophisticatedly control the coupled leaky modes to avoid adverse effects, or apply these modes in high-gain antenna application. One of the two first higher-order leaky modes obtained in the two-layered case is weakly attenuated, while the other is strongly attenuated. A high-gain, narrow-beam leaky-mode antenna using only the weakly attenuated leaky mode is designed and measured as an application of this broadside-coupled structure, exhibiting a marked beam-width reduction of 60%. This antenna is the first Yagi-Uda-like array antenna that utilizes the higher-order leaky modes of the microstrip, for which the three basic elements - driver, reflector and director - are stacked in the broadside direction. The attenuation rate can be further reduced by adjusting the strip width of the director. The half-power beam-width of the leaky-mode antenna applying two-layered broadside-coupled microstrips with wider top microstrip is measured to be 2.1o at 25.2o from the broadside at 34 GHz. A one-dimensional leaky-mode antenna is successfully designed and measured. This antenna array needs simpler feeding network to realize a nearly-broadside pencil beam radiation and shows high efficiency and performance.
Lukashevich, Dzianis [Verfasser]. "Model order reduction (MOR) in transmission line matrix (TLM) method / Dzianis Lukashevich." 2005. http://d-nb.info/977594025/34.
Повний текст джерелаLi, Chin-Yuan, and 李金源. "Dual-Band Zeroth-Order Antenna Using Composite Right/Left-Handed Transmission Lines." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/38604475544491480616.
Повний текст джерела長庚大學
電子工程學研究所
97
In this thesis , arbitrary dual-band antennas are presented by using zeroth , positive and negative order mode oscillating by composite right/left handed transmission lines (CRLH TLs). In the first part of this thesis, we introduce metamaterial and left-hand material . Then we present the concept of CRLH TLs in balanced and unbalanced forms. We also discuss zeroth order mode oscillator in the end of this section. In the second part of this thesis, we use ladders of the capacitors and inductors to approximate the characteristics of CRLH TLs. Then we explain how to design and extract the values of interdigital capacitors and shunt stub inductors used in CRLH TLs. Finally, zeroth order mode oscillators are demonstrated by using zeroth order mode theory. In the third part of this thesis, dual-band antenna is implemented by using CRLH TLs. Thus, the operating frequencies cover all of the mobile communication and WLAN band. Then using concave gap coupled to periodical interdigital capacitors and shunt stub inductors structure to reach the dual-band matching of the zeroth and negative order mode, Finally , a miniaturized antenna is demonstrated by using lumped elements to reach the dual-band results.
Ou, Shih-Hao, and 歐士豪. "Out-of-Order Transmission Enabled Congestion and Scheduling Control for Multipath TCP." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/34997220427307146017.
Повний текст джерела國立中央大學
通訊工程學系
104
With development of wireless communication technologies, mobile devices are commonly equipped with multiple network interfaces and ready to adopt emerging transport layer protocols such as multipath TCP (MPTCP). The protocol is specifically useful for Internet of Things streaming applications with critical latency and bandwidth demands. To achieve full potential of MPTCP, major challenges on congestion control, fairness, and path scheduling are identified and draw considerable research attention. In this paper, we propose a joint congestion control and scheduling algorithm allowing out-of-order transmission as an overall solution. It is achieved by adaptive window coupling, congestion discrimination, and out-of-order transmission enabled scheduling. The algorithm is implemented in the Linux kernel for real-world experiments. Favorable results are obtained in minumum topology and both shared or distinct bottleneck scenarios.
Amado, Sofia Batalha de Oliveira Pascoal. "Digital equalization for optical coherent transmission systems." Doctoral thesis, 2019. http://hdl.handle.net/10773/28532.
Повний текст джерелаA presente tese foca-se na equalização digital das distorções da fibra para sistemas óticos de transmissão coerente. São propostas novas técnicas eficientes e de baixa complexidade para a equalização e mitigação das distorções não lineares da fibra, e o compromisso entre desempenho e complexidade é testado numericamente e demonstrado experimental em sistemas de transmissão metro e longa distância baseados em supercanais 400G. A propagação digital inversa baseada no método de split-step Fourier e equalizadores não lineares de séries de Volterra de baixa complexidade são testadas experimentalmente num sistema baseado em supercanais uniformes. Ao contrário dos métodos convencionais utilizados, estas técnicas podem ser implementadas utilizando menos interações e ainda extender o alcance do sistema face às técnicas de equalização linear. Para além disso, a complexidade do método baseado em Volterra pode ser facilmente ajustada alterando a dimensão do filtro não linear de acordo com os requisitos do sistema, concedendo assim maior flexibilidade ao bloco de equalização não linear. Tendo em vista as futuras redes flexı́veis, um supercanal hı́brido na frequência é proposto de modo a aumentar a granularidade da taxa de transmissão do sistema. A problemática da relação de potência entre as portadoras do supercanal é abordada e optimizada em regimes de operação linear e não linear utilizando paradigmas diferentes de códigos correctores de erros. A aplicação de um único código corrector de erros à totalidade do supercanal mostra ser a abordagem mais robusta, tolerando maiores incertezas na optimização dos parâmetros do sistema. O ganho de desempenho dado pela aplicação de diferentes técnicas de propagação digital inversa em sistemas de supercanais hı́bridos na frequência é tamém analizado, assim como as suas implicações na relação óptima de potência. Mostra-se que esta pode ser restringida à portadora que transporta o formato de modulação de ordem mais elevada, uma vez que o benefı́cio trazido pelas restantes portadotas é negligenciável, permitindo reduzir significativamente a complexidade do algoritmo aplicado.
Programa Doutoral em Telecomunicações
"Deadline-ordered burst-based parallel scheduling strategy for IP-over-ATM with QoS support." 2001. http://library.cuhk.edu.hk/record=b5890857.
Повний текст джерелаThesis (M.Phil.)--Chinese University of Hong Kong, 2001.
Includes bibliographical references (leaves 66-68).
Abstracts in English and Chinese.
Chapter 1 --- Introduction --- p.1
Chapter 1.1 --- Thesis Overview --- p.3
Chapter 2 --- Background and Related work --- p.4
Chapter 2.1 --- Emergence of IP-over-ATM --- p.4
Chapter 2.2 --- ATM architecture --- p.5
Chapter 2.3 --- Scheduling issues in output-queued switch --- p.6
Chapter 2.4 --- Scheduling issues in input-queued switch --- p.18
Chapter 3 --- The Deadline-ordered Burst-based Parallel Scheduling Strategy --- p.23
Chapter 3.1 --- Introduction --- p.23
Chapter 3.2 --- Switch and queueing model --- p.24
Chapter 3.2.1 --- Switch model --- p.24
Chapter 3.2.2 --- Queueing model --- p.25
Chapter 3.3 --- The DBPS Strategy --- p.26
Chapter 3.3.1 --- Motivation --- p.26
Chapter 3.3.2 --- Strategy --- p.31
Chapter 3.4 --- The Deadline-ordered Burst-based Parallel Iterative Matching --- p.33
Chapter 3.4.1 --- Algorithm --- p.34
Chapter 3.4.2 --- An example of DBPIM --- p.35
Chapter 3.5 --- Simulation results --- p.33
Chapter 3.6 --- Discussions --- p.46
Chapter 3.7 --- Future work --- p.47
Chapter 4 --- The Quasi-static DBPIM Algorithm --- p.50
Chapter 4.1 --- Introduction --- p.50
Chapter 4.2 --- Quasi-static path scheduling principle --- p.51
Chapter 4.3 --- Quasi-static DBPIM algorithm --- p.56
Chapter 4.4 --- An example of Quasi-static DBPIM --- p.59
Chapter 5 --- Conclusion --- p.63
Bibliography --- p.65
Shankar, H. (Hari). "Asymptotic analysis of digital transmission systems for a first order Gauss-Markov process." Thesis, 1991. http://hdl.handle.net/10125/9746.
Повний текст джерелаYo-MingChang and 張祐銘. "Efficient Detection for the Single-Carrier Block Transmission System with High-Order Modulation." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/efn572.
Повний текст джерела張家銘. "Transmission Loss and Propogation of Higher Order Modes in A Muffler with Large Straight Pipe." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/5wnp82.
Повний текст джерела逢甲大學
機械與電腦輔助工程學系
102
This thesis is to investigate the transmission loss and high-order acoustic modes of the exhaust muffler of auxiliary power unit (APU) by using finite element analysis. To calculate the transfer impedance, the acoustic impedance of perforate plates and felt metals which are between chambers and straight duct are found based on NASA and AIDC reports. Then the acoustic behavior of high-order acoustic modes of muffler is simulated by using modal basis method. Transmission losses of APU muffler under several load cases are studied. Computer simulation results show that the main sound reduction frequency range is 400~1300Hz and is attributed to chambers with perforate plate. Because the air thickness of chamber#2 is similar to the 1/4 wave length of 920 Hz sound and the interference of 920Hz sound occurs in this chamber and the node lines of that acoustic mode are at duct, the transmission loss peak is at around 1000Hz. However chambers with felt metal offer 10dB transmission loss at all frequency area in this study. In the case of all chambers which are with perforate plate, the transmission loss is greater and reduction frequency range is expanded to 400~200Hz. Otherwise, the spinning modes occur in straight duct while excite frequency higher than cut-off frequencies. Furthermore, the transmission of high-order acoustic modes through muffler is much less than plane wave.
"Algorithm and Model Development for Innovative High Power AC Transmission." Doctoral diss., 2015. http://hdl.handle.net/2286/R.I.29610.
Повний текст джерелаDissertation/Thesis
Doctoral Dissertation Electrical Engineering 2015
Hung, Mei-Ju, and 洪美如. "Studies of the High Order B-Spline Panel Method in the Transmission Loss Analysis of Mufflers." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/13431452529173830534.
Повний текст джерелаChen, Yu-Cheng, and 陳又誠. "The Studies of Enhanced Extraordinary Transmission of Higher Order Plasmon Modes with Periodic Paired-Shaped Apertures and Enhanced Higher Order IR Thermal Emitters." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/39469253899859844901.
Повний текст джерела國立臺灣大學
光電工程學研究所
100
The extraordinary transmission of gold film perforated with paired-shaped aperture array arranged in a rectangle lattice is investigated in theory and experiment. The intensities of higher order SPP modes are found to be much stronger than that of fundamental one. It is demonstrated that the enhanced higher order modes can be generated by various paired apertures as the basis in both symmetric and asymmetric designs, regardless of sizes and shapes. It is proven that the separation between the paired apertures is the key factor to determine which higher order plasmon modes can be enhanced. In addition, transmission properties of random gold nanoparticles embedded inside periodic hole arrays have been studied in the infrared region as well. By using rapid thermal annealing technique, different thickness of gold film result in randomly distributed nanoparticles. Therefore, it significantly enhances the overall transmission of higher order modes in the infrared region. Moreover, the characteristics of metal/insulator/metal (MIM) structured plasmonic thermal emitter (PTE) using periodic hole array with asymmetric paired apertures as top metallic layer are investigated. The significantly enhanced higher order SPP modes in reflectance and emittance spectra are observed. This demonstration of enhanced second order SPP modes in IR thermal emitters gives great promises for second harmonic generation in the mid-infrared region.
Chen, Chih-Ping, and 鄭至斌. "An Extremely Wideband Common-Mode Filter Using Second Order Transmission Zero of Magnified Coupled Defected Ground Structure." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/bmr5w8.
Повний текст джерела國立臺北科技大學
電子工程系
106
In this paper, we propose an extremely wideband common-mode band-stop filter for high-speed differential signals. The proposed design is realized by using second order transmission zero, which is generated from the magnified coupled defected ground structures (DGSs), to reach the wideband common-mode noise suppression. Moreover, the proposed structure is fabricated on printed circuit board (PCB) with low cost and simple manufacturing process, and the equivalent circuit model of the proposed DGS resonators, are also constructed to predict the phenomenon of the common mode stopband. By observing the full-wave simulation and measured result, the differential-mode insertion loss is within -5dB form DC to 10 GHz. Common-mode noise can be reduced over 10 dB from 3.1 GHz to 15.5 GHz in the frequency domain, and approximately 63% of amplitude in the time domain. The differential eye diagram measurement also proves the differential signals retain good quality of transmission. These results show that the proposed common-mode band-stop filter can effectively suppress the common-mode noise with broadband characteristic, and keep good differential signal integrity at the same time. Additionally, the fractional bandwidth of the common-mode stopband can achieve 133%, and the filter size is only 0.274g x 0.284g, where g is the wavelength of the stopband central frequency. Finally, to our knowledge, this is the first common-mode filter using the second order transmission zero and magnified coupled DGS for the high-speed signals to extend the stopband. And it is also a simple geometric structure with the largest fractional bandwidth and the most compact size on a PCB.
"Optimum Corona Ring Design for High Voltage Compact Transmission Lines Using Gaussian Process Model." Master's thesis, 2012. http://hdl.handle.net/2286/R.I.15104.
Повний текст джерелаDissertation/Thesis
M.S. Electrical Engineering 2012
Fernandes, Gil Gonçalo Martins. "Optical and digital signal processing in space-division multiplexing transmission systems." Doctoral thesis, 2018. http://hdl.handle.net/10773/28329.
Повний текст джерелаA presente tese tem por objectivo o desenvolvimento de técnicas de processamento ótico e digital de sinal para sistemas coerentes de transmissão ótica com multiplexagem por diversidade espacial. De acordo com a magnitude de diafonia espacial, estes sistemas podem ser agrupados em sistemas com e sem seletividade espacial, alterando drasticamente o seu princípio de funcionamento. Em sistemas com seletividade espacial, o acoplamento modal é negligenciável e, portanto, um canal espacial arbitrário pode ser encaminhado de forma independente através da rede ótica e pós-processado no recetor ótico coerente. Em sistemas sem seletividade espacial, o acoplamento modal tem um papel fulcral pelo que os canais espaciais são transmitidos e pós-processados conjuntamente. Perante este cenário, foram desenvolvidas técnicas de comutação entre canais espaciais para sistemas com seletividade espacial, ao passo que para sistemas sem seletividade espacial, foram desenvolvidas técnicas digitais de desmultiplexagem espacial. O efeito acústico-ótico foi analisado em fibras com alguns modos (FMF) e em fibras com múltiplos núcleos (MCF) com o intuito de desenvolver técnicas de comutação de sinal no domínio ótico. Em FMF, demonstrou-se numérica e experimentalmente a comutação do sinal entre dois modos de propagação arbitrários através de ondas acústicas transversais ou longitudinais, enquanto, em MCF, a comutação entre dois núcleos arbitrários é mediada por um processo de acoplamento duplamente ressonante induzido por ondas acústicas transversais. Ainda neste contexto, analisou-se a propagação do sinal no regime multimodal não linear. Foi deduzida a equação não linear de Schrödinger na presença de acoplamento modal, posteriormente usada na análise do processo multimodal de mistura de quatro ondas. Nas condições adequadas, é demonstrado que este processo permite a comutação ótica de sinal entre dois modos de propagação distintos. A representação de sinal em esferas de Poincaré de ordem superior é introduzida e analisada com o objetivo de desenvolver técnicas de processamento digital de sinal. Nesta representação, um par arbitrário de sinais tributários é representado numa esfera de Poincaré onde as amostras surgem simetricamente distribuídas em torno de um plano de simetria. Com base nesta propriedade, foram desenvolvidas técnicas de desmultiplexagem espacial e de compensação das perdas dependentes do modo de propagação, as quais são independentes do formato de modulação, não necessitam de sequências de treino e tendem a ser robustas aos desvios de frequência e às flutuações de fase. As técnicas referidas foram validadas numericamente, e o seu desempenho é avaliado mediante a penalidade remanescente na relação sinal-ruído do sinal pós-processado. Por fim, a complexidade destas é analiticamente descrita em termos de multiplicações reais por amostra.
Programa Doutoral em Engenharia Eletrotécnica