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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Valuation of Cable system operater

Lin, Long-Sheng 07 February 2002 (has links)
none
2

Nonlinear dynamic response of a cable system to additive and parametric random excitations

Ghiocel, Dan Mircea January 1993 (has links)
No description available.
3

Aplicação da matriz de decisão na análise técnica e econômica para investimentos na modernização de redes de distribuição /

Bernardelli, Walter Henrique January 2017 (has links)
Orientador: Dionízio Paschoareli Júnior / Resumo: Este trabalho apresenta um método que visa possibilitar a gestão do aparente impasse envolvendo três agentes do setor elétrico. A Distribuidora de Energia que visa lucros, o Regulador que impõe às Distribuidoras, metas permanentes de melhor desempenho juntamente com viés de redução das tarifas e o Consumidor que deseja qualidade de fornecimento de energia e tarifas justas. Este método possibilita identificar e priorizar com precisão qual circuito de um sistema elétrico é mais adequado para os investimentos em melhoria de desempenho, quantificar o ganho de qualidade após as melhorias e avaliar técnica e economicamente se o benefício obtido em melhoria de qualidade produzirá retorno financeiro para remunerar o investimento. Para o desenvolvimento deste método, os dados de desempenho do sistema elétrico foram tratados estatisticamente para identificar quais ocorrências podem ser mitigadas com ações da distribuidora. Foi desenvolvida uma matriz de decisão multiatributos, referenciada pelos parâmetros de desempenho do sistema elétrico, para possibilitar a ordenação das regiões elétricas prioritárias para investimentos em melhorias. As ações técnicas de melhorias consideram a utilização de redes compactas e através de medições de desempenho destas redes e a comparação com o desempenho de redes nuas, foi possível estabelecer o potencial de redução do número de ocorrências após a implantação. Foi estabelecido critérios para identificar a taxa de melhoria de desempenho, que estabelece... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This paper presents a methodology which supports the management of this apparent impasse involving three electricity sector agents. The Utility Company which focus on profit, the Regulator that imposes on Distributors permanent goals of better performance together with tariff reduction biases, and the Consumer who seeks for quality of energy supply and fair tariffs. This method makes it possible to accurately identify and prioritize which circuit of an electrical system is most appropriate for investments in performance improvement and to technically and economically evaluate whether the benefit obtained in quality improvement will yield financial return for the investment. For the development of this method, the performance data of the electrical system was treated statistically to identify which occurrences could be mitigated by distributor actions. A multi-attribute decision matrix was developed, supported by the performance parameters of the electric system, to enable the ordering of the priority electric regions for investments in improvements. The technical actions of improvements consider the use of spacer cable system. Through performance measurements of these networks, it was possible to establish the potential of reducing the number of occurrences after the implantation. To identify the rate of performance improvement a criterion has been established which establishes the correlation between the modernized network extension and the reduction of the number of occurre... (Complete abstract click electronic access below) / Doutor
4

線纜事業法律之研究- 英美德日四國法律之比較

陳百齡, CHEN, BAI-LING Unknown Date (has links)
綱要:目前我國正進行是否建立線纜系統(Cable System)之可行性研究,線纜系統 之發展涉及市場、軟體、技術、以及法律等諸多問題,其中以法律問題影響尤鉅,本 研究希望從比較觀點來看各國線纜事業法律,俾供傳播和法律學者作為進一步探討之 基礎。 第一章導論,敘述本研究之研究動機與研究方法。 第二章英美德日四國線纜立法背景與線纜事業法律。 第三章四國線纜法律之綜合比較。 第四章建議與結論。
5

Dynamic Modeling, Trajectory Generation and Tracking for Towed Cable Systems

Sun, Liang 03 December 2012 (has links) (PDF)
In this dissertation, we focus on the strategy that places and stabilizes the path of an aerial drogue, which is towed by a mothership aircraft using a long flexible cable, onto a horizontally flat orbit by maneuvering the mothership in the presence of wind. To achieve this goal, several studies for towed cable systems are conducted, which include the dynamic modeling for the cable, trajectory generation strategies for the mothership, trajectory-tracking control law design, and simulation and flight test implementations. First, a discretized approximation method based on finite element and lumped mass is employed to establish the mathematical model for the towed cable system in the simulation. Two approaches, Gauss's Principle and Newton's second law, are utilized to derive the equations of motion for inelastic and elastic cables, respectively. The preliminary studies for several key parameters of the system are conducted to learn their sensitivities to the system motion in the steady state. Flight test results are used to validate the mathematical model as well as to determine an appropriate number of cable links. Furthermore, differential flatness and model predictive control based methods are used to produce a mothership trajectory that leads the drogue onto a desired orbit. Different desired drogue orbits are utilized to generate required mothership trajectories in different wind conditions. The trajectory generation for a transitional flight in which the system flies from a straight and level flight into a circular orbit is also presented. The numerical results are presented to illustrate the required mothership orbits and its maneuverability in different wind conditions. A waypoint following based strategy for mothership to track its desired trajectory in flight test is developed. The flight test results are also presented to illustrate the effectiveness of the trajectory generation methods. In addition, a nonlinear time-varying feedback control law is developed to regulate the mothership to follow the desired trajectory in the presence of wind. Cable tensions and wind disturbance are taken into account in the design model and Lyapunov based backstepping technique is employed to develop the controller. The mothership tracking error is proved to be capable of exponentially converging to an ultimate bound, which is a function of the upper limit of the unknown component of the wind. The simulation results are presented to validate the controller. Finally, a trajectory-tracking strategy for unmanned aerial vehicles is developed where the autopilot is involved in the feedback controller design. The trajectory-tracking controller is derived based on a generalized design model using Lyapunov based backstepping. The augmentations of the design model and trajectory-tracking controller are conducted to involve the autopilot in the closed-loop system. Lyapunov stability theory is used to guarantee the augmented controller is capable of driving the vehicle to exponentially converge to and follow the desired trajectory with the other states remaining bounded. Numerical and Software-In-the-Loop simulation results are presented to validate the augmented controller. This method presents a framework of implementing the developed trajectory-tracking controllers for unmanned aerial vehicles without any modification to the autopilot.
6

Návrh kabeláže v průmyslovém prostředí - administrativní budova / Project of Cabling System for Industrial Ethernet - Administration Building

Pospíšilová, Renata January 2011 (has links)
The goal of this master’s thesis is to suggest a cabling system in an administration building of company PHARMIX s.r.o. This cabling system must improve nowadays situation in the administration building and simultaneously has to make possible reserves for following enlargement of computing equipment. This cabling system must be also variable in case of possible rebuilding offices. In the master’s thesis, there are described processes whose aim is an optimal solution, to suggested cabling system.
7

Návrh ICT projektu a aplikace metodiky projektového managementu v podniku / Design of ICT Project and Project Management Application in Company

Vraniak, Lukáš January 2015 (has links)
The diploma thesis puts forward the proposal of the construction project of a generic ceble system in the company Sport Studio Suzan, s.r.o., which is engaged in small-scale sport functional clothing. Based on the theoretical part and the analysis of the current internal and external position of the copmany is designed the proposal of implementation generic cable system. The whole work is compiled according to the methodology of project management IPMA.

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