碩士
國立交通大學
電機與控制工程系
88
This thesis deals with the problem of using sliding mode technique to control and observethe states of an induction motor.We hope to directly regulate the rotor torque and the ...square of the rotor flux magnitude to the desired value. Nonlinear sliding surfaces are chosen and stator voltages
are derived such that the state trajectories have a sliding mode behavior for driving system to achieve the control objective.
Since in practice the rotor fluxes are hard to measure, a sliding mode observer is used to estimate the rotor fluxes.Moreover, we use a MARC speed controller to control the rotor speed.
Computer simulations in this thesis are performed using C language.Hardware implementation is based on a PC(Personal Computer) and relative circuits. Finally, experimental results are presented to show the superiority of the proposed theory and the accuracy of the software and hardware design for the experimental system.
碩士
國立臺南大學
科技管理研究所碩士班
99
Large-scale construction often follows devastation; the 921 earthquake “quaked out” the promising business of black tea in Yuchi Township. This study adopted the qualitative ...research method, case study, to explore the issue that the black tea industry in Yuchi creates a competitive advantage and further achieves the goal of value creation through the development of the Competitive Advantage of Nation Diamond Model as theorized by Michael E. Porter. Based on the relevant literature on competitive advantage, Diamond Model and tea industry, this study aimed to analyze the phenomena affecting the black tea industry development in Yuchi. The black tea industry in Yuchi was chosen as the research subject since it plays a vital role in the entire history of Taiwan’s tea industry and is also one of the government-subsidized quality agricultures. As the black tea industry in Yuchi was considered a case worthy of in-depth exploration in this study, it was chosen as the research subject. The stud
碩士
國立暨南國際大學
教育政策與行政學系
102
The purpose of this study is to explore that senior high school educators who participate Senior High School Actualization Program can promote school brand image status. And ...secondly, to present the current and the differential situation of comparing school educators with different background variables in promoting Senior High School Actualization Program and the brand image. Thirdly, to explore the relationship between the quality degree of senior high school and school brand image.Finally, to provide the thesis as a reference for educational authorities, schools and other researchers for future research.
Questionnaire survey is conducted in this study. Research tools as " the relationship of Senior high school in participating in Senior High School Actualization Program and school brand image questionnaire." The questionnaire included "the quality degree of senior high school scale" and " senior high school brand image scale." The research object is the public and private senior hi
博士
國立臺灣大學
國際企業學研究所
95
This dissiteration is consist of two parts:part one is "The Role of Convertible Securities in Venture Capital Financing",and part two is "Control Right and Liquidity Demand for ...Star-up Firm".
In part one, we study the role of convertible securities
in the financing of start-up enterprises when the entrepreneurs are better informed than the venture capitalists (VCs).We demonstrate that for a well-designed contract the conversion ratio of the securities can be used as a signaling device to overcome the problem of information asymmetry If the variability of the return is sufficiently large, the entrepreneurs will find it desirable to rely on convertible securities with the conversion ratio revealing part of his information,
that is, a "separating equilibrium" will arise. Such an equilibrium has the advantage of avoiding the incentive constraints that appear in the other "pooling equilibrium",
in which the privately held information is not revealed.
We show that the time-lag of decisions bet
