Dissertations / Theses on the topic 'Power and control in the research process'
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Guy, Richard, and edu au jillj@deakin edu au mikewood@deakin edu au wildol@deakin edu au kimg@deakin. "DISTANCE, DIALOGUE AND DIFFERENCE A Postpositivist Approach to Understanding Distance Education in Papua New Guinea." Deakin University. School of Education, 1994. http://tux.lib.deakin.edu.au./adt-VDU/public/adt-VDU20041209.093035.
Full textHecker, Rogelio Lorenzo. "Power feedback control in cylindrical grinding process." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/16619.
Full textCheng, Wei Min 1964. "Microwave power control strategies on the drying process." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81271.
Full textThe system performance was evaluated. It was observed that phase-controlled power regulator could be successfully used for quasi-continuous (fast-switching) power regulation with the maximization of power efficiency. The degradation of output microwave power was recorded and the nonuniform distribution of microwave field in the cavity was also verified.
The effects of phase control and cycle control were evaluated through combined microwave and convective drying of potato samples. Results showed that different power control methods had different impacts on drying kinetics and product quality. In both drying modes, the drying time increased with the decrease of microwave power density and the increase of air velocity. The drying rates of cycle-controlled drying are significantly higher than those of phase-controlled drying. In terms of rehydration capacity the phase-controlled drying mode produced better results. The product colour and sensory attributes were independent of the power control methods.
Manansala, Edgardo Celestino. "Adaptive power system control." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54391.
Full textPh. D.
Wise, Marshall Alan. "Simultaneous process control of several independent quality variables." Thesis, Virginia Tech, 1990. http://hdl.handle.net/10919/41532.
Full textMaster of Science
Han, Zhixin. "Implementation of power and force adaptive control of the end milling process." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ46583.pdf.
Full textBegovic, Miroslav M. "Analysis, monitoring and control of voltage stability in electric power systems." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54490.
Full textPh. D.
Arora, Bela. "Exploitation, power and language in the arms control process : a neo-Gramscian perspective." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.525349.
Full textMousavi, Takami Kourosh. "Process Control and Simulation of Ferromagnetic Strip in the Power Transformers and Electrical Machines Applications : Electric power systems." Doctoral thesis, Västerås : School of Sustainable Development of Sociaty and Technology, Mälardalen University, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-6648.
Full textDexter, Mark D. "Initial research on an inventory control process for low attrition repairable items." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/27097.
Full textPrat, Joaquin, Alvaro Romero, Sandra Rodriguez, and Julio Farje. "Optimization of the control process in residential buildings using technological tools." Institute of Electrical and Electronics Engineers Inc, 2020. http://hdl.handle.net/10757/656567.
Full textChan, Ting. "Analytical methods for power monitoring and control in an underwater observatory /." Thesis, Connect to this title online; UW restricted, 2007. http://hdl.handle.net/1773/6053.
Full textLi, Zhiao. "A New Design of DC-DC Converter For Capacitive Deionization Process." UKnowledge, 2014. http://uknowledge.uky.edu/ece_etds/60.
Full textBello, Simon Antonio. "Intraocular Pressure Sensing and Control for Glaucoma Research." Scholar Commons, 2016. http://scholarcommons.usf.edu/etd/6466.
Full textMELLO, JOSÉ ROBERTO de. "Regulamentação do sistema elétrico do reator IEA-R1." reponame:Repositório Institucional do IPEN, 2016. http://repositorio.ipen.br:8080/xmlui/handle/123456789/26928.
Full textMade available in DSpace on 2016-12-21T12:55:48Z (GMT). No. of bitstreams: 0
O reator IEA-R1 do Instituto de Pesquisas Energéticas e Nucleares (IPENCNEN/ SP) é um reator de pesquisa tipo piscina aberta, projetado e construído pela empresa norte-americana \"Babcock & Wilcox\", tendo, como refrigerante e moderador, água leve deionizada e berílio e grafite como refletores. Até cerca de 1988, os sistemas de segurança do reator recebiam alimentação de uma única fonte de energia. Nos anos de 1989 e 1990, uma reforma de modernização do sistema elétrico para aumentar a potência do reator e, também, para atender às normas técnicas da Comissão Nacional de Energia Nuclear (CNEN) e da Associação Brasileira de Normas Técnicas (ABNT) foi realizada. Este trabalho tem o objetivo de mostrar a relação entre o sistema de energia elétrica e a segurança do reator IEA-R1. Além disso, ele demonstra que, caso ocorra alguma interrupção de energia elétrica durante a operação do reator, esta ocorrência não irá começar um evento de acidente.
Dissertação (Mestrado em Tecnologia Nuclear)
IPEN/D
Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP
Leger, Robert P. "Analysis and monitoring of a CANDU nuclear power plant using multivariate statistical process control methods." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0032/NQ66218.pdf.
Full textCampion, Garry. "'People, process, place and power' : an archaeology of control in East Midlands outworking 1820-1900." Thesis, University of Leicester, 1999. http://hdl.handle.net/2381/34924.
Full textAltay, Alkan. "Steering Of Redundant Robotic Manipulators And Spacecraft Integrated Power And Attitude Control - Control Moment Gyroscopes." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607043/index.pdf.
Full textHuang, Chiung-Yi. "The application of phasor measurements for adaptive protection and control." Thesis, Virginia Tech, 1991. http://hdl.handle.net/10919/42131.
Full textThis thesis describes an adaptive protection scheme that performs the collection of the voltage and
current phasors during post-fault period, tracking the power swing phenomena, identifying the onset
of instability, and then issuing a stabilizing command. In this work, the protection system is to
maintain the reliability! ensure the secure operation, and prevent total collapse of the power system.
The work is based upon methods of clustering for meter placement in a bulk power system, and
selecting the pilot points for installing the phasor measurement units (PMU) to measure the bus
voltage phasors and associated branch current phasors. According to the network law, fast calculation
of state estimation can be made from these measurements. Because the on-line assessment
of transient stability has to provide a quick and approximate result, the direct method which determines
stability without explicit integration techniques is applicable in this study.
The results of the system stability prediction in real-time by digital computer simulation under
stable and unstable operating conditions are presented.
Master of Science
Glass, Jayne H. "The power of the research process : co-producing knowledge for sustainable upland estate management in Scotland." Thesis, University of the Highlands and Islands, 2011. https://pure.uhi.ac.uk/portal/en/studentthesis/the-power-of-the-research-process(1924f054-1d11-41f5-a30b-55c6e9f823b9).html.
Full textSvensson, Olle. "Experimental results from the Lysekil Wave Power Research Site." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-179098.
Full textDen här avhandlingen berättar om hur experimenten vid Lysekils forskningsområde för vågkraft har utförts. Insamlade mätdata har använts för att verifiera teoretiska samband som modulerats vid Elektricitetslära, Uppsala universitet. De teoretiska och praktiska resultaten har visat på att vågkraft har förutsättningarna att implementeras som en hållbar framtida energikälla. Intressanta mätmetoder har utvecklas och påfrestningarna på utrustningin och dess samband med medel effekten har studerats.
Lysekils projektet
Pieters, Willem Diederick. "Monitoring, protection, and voltage control of parallel power transformers based on IEC 61850-9-2 process bus." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/3067.
Full textThe purpose of an electrical power system is to supply electrical energy to the customers. Power transformers are required to transform the system voltage from generation to transmission and distribution levels. Protection and control systems must ensure that power system high voltage equipment such as transformers operate and deliver save, reliable and secure electricity supply. The aim of the project research work is to develop and implement a strategy, methods and algorithms for monitoring, protection and voltage control of parallel power transformers based on IEC 61850-9-2 process bus standard. NamPower is a power utility in Namibia. The IEC 61850 protocol for electrical substation automation system is used for the protection and control of 5 power transformers operated in parallel in an existing substation system. The IEC 61850-9-2 process bus standard is however not used in regards of Sampled Values (SV). Protection and control devices are connected to a substation communication network, routers and switches using fibre optic linked Ethernet. Inductive Current Transformers (CTs) and Voltage Transformers (VTs) secondary circuits are hardwired to Intelligent Electronic Devices (IEDs) and fibre optic links are not used for this purpose at process level communication. The research focuses on the implementation of the IEC 61850 standard with Merging Units (MUs) and sampled values to improve the existing implemented protection and control system at NamPower. This includes substation communication networks and MUs used for transformer protection, voltage regulator control and cooling fan control. At the present the CTs located at the transformer bushings and switchgear and the VTs located at the switchgear are hardwired to the inputs on protection and control IEDs. The research focuses on issues with the copper wires for voltage and currents signals and how these issues can be eliminated by using the MUs and the SV protocol. The MUs which are considered in this Thesis is to improve the voltage regulator control and the control of the cooling fan motors. The voltage regulator control IED is situated at the tap change motor drive of the On-Load Tap Changer (OLTC). The IED of each transformer is required to regulate the voltage level of the secondary side bus bar it is connected to. All the regulating IEDs are required to communicate with each other and collectively to control the bus bar voltage depending on the switching configuration of the parallel transformers. The control circuit for controlling the cooling fan motors is hardwired. Temperature analogue signal input into a programmable automation controller IED can be used for controlling the transformer cooling fans. A strategy, methods and algorithms for transformer protection, voltage regulator control and cooling fan motor control of parallel power transformers need to be developed and implemented based on IEC 61850-9-2 process bus. Power utilities and distributors can benefit from interpretation of the IEC 61850-9-2 standard and implementing MUs and SV in substations. MUs can be included in the power transformer protection, automation and control systems. A cost reduction in high voltage equipment, substation installation and commissioning costs and better performance of protection and control system are anticipated.
Kurnianto, Kristedjo. "Application of machine learning techniques to power plant sensor validation /." [St. Lucia, Qld.], 2004. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe17689.pdf.
Full textSoman, Ruturaj. "Research and development of diagnostic algorithms to support fault accommodating control for emerging shipboard power system architectures." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=24389.
Full textAbughazaleh, Tareq Ali Ibrahim. "The viability of Weibull analysis of small samples in process manufacturing." Thesis, University of Hertfordshire, 2002. http://hdl.handle.net/2299/14042.
Full textPattinson, Thomas. "Optimal sysnthesis of storageless batch plants using the Process Intermediate Storage Operational policy." Pretoria : [s.n.], 2007. http://upetd.up.ac.za/thesis/available/etd-08272008-125107/.
Full textZimmerman, Mark D. "In Vivo RF Powering for Advanced Biological Research." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1212429431.
Full textSafdarnejad, Seyed Mostafa. "Developing Modeling, Optimization, and Advanced Process Control Frameworks for Improving the Performance of Transient Energy-Intensive Applications." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6057.
Full textLiu, Jianzhe. "On Control and Optimization of DC Microgrids." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1512049527948171.
Full textCunningham, John B. "Field Testing the Effects of Low Reynolds Number on the Power Performance of the Cal Poly Wind Power Research Center Small Wind Turbine." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2249.
Full textFalk, Thomas. "Safety Reviews of Technical System Modifications in the Nuclear Industry." Licentiate thesis, KTH, Filosofi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-118843.
Full textQC 20130305
Hsia, Lei, and 夏磊. "Research of AGC Control in Interconnected Power System." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/xbb83p.
Full text國立臺灣大學
電機工程學研究所
106
The power system frequency is one of the three performance indicators of the power system operating quality. Frequency stability is the basic requirement for the operation of the power system. The premise is that the power generation and load including the power loss of the network match each other. According to the load changes of the power system, how to adjust the output of the generator at any time to meet the requirements of the load changes is a problem solved by the automatic generation control. The interconnected power system has time-varying, nonlinear, large delay, uncertainty and other characteristics. The conventional PID controller can not achieve excellent control performance. In order to improve the control performance of the complex system, this thesis designs the adaptive PID controller based on fuzzy control. Comparing with the conventional PID controller, the simulation results show that: in the interconnected power system, the adaptive PID controller based on fuzzy control improves the dynamic and static characteristics of the system. Afterwards, we use the particle swarm optimization algorithm to obtain the best value of the PID control parameters. Through observing the dynamic response conditions such as the frequency of the two regions and the change of the exchange power of the connection lines, we can prove the feasibility and superiority of the method.
Yang, Ching-Min, and 楊景閔. "A Research of Power Control Based on WLANs." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/mtvg29.
Full text銘傳大學
資訊工程學系碩士班
93
In general, wireless local area networks (WLANs) have benefits of mobility, rapidly development, flexibility and low cost. In the mobility case, mobile devices often maintain an operation by a battery. However, the life of a battery is limited, it is worth to discuss and research this issue on how to save power consumption and support maximum efficiency. In this paper, the main aim is discussing the research of power control based on ad hoc WLAN. First, we use the antenna diversity technology to adopt the radiation pattern, change the radio direction that antenna transmitted, and then change the power level of antenna in transmission to avoid the unnecessary power consumption. The method is to measure the Signal-to-Noise Ratio (SNR) information in different environments and distances, calculate the channel maximum capacity by the Shannon theorem, and dynamicly modulate the antenna radiation pattern and transmission power level by the SNR. Then we will analyze and find the proper radiation pattern and power level to obtain the stable performance for data transmission at the minimum power consumption.
Templer, Abby I. "Process Matters: Engaging the Productive Power of Sociological Research." 2014. https://scholarworks.umass.edu/theses/1203.
Full textChu, Hsiang-Chi, and 朱祥騏. "Research of Solar Cell Containing Advanced Process Control." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/15919857900188994629.
Full text國立彰化師範大學
電機工程學系
99
This thesis is based on the semiconductor equipment communication standard protocol and APC Framework Applications defined by SEMI standard. It is applied to crystallization silicon solar cell etch equipment, and by combining programmable logic controller and computer integrated manufacturing system to reach advanced process control. According to the collect equipment movement message and information, the system offers on-line process parameter adjustment, so as to ensure the quality that the solar cell produces. If the state of production equipment is abnormal, the system will reciprocate the information and handle decision analysis immediately. It will improve the production equipment rate of utilization of the solar cell. Moreover, this research institute PLC and CIM PC communication norm and uses Ethernet configuration to transmission of the data.
Chen, Li-Chi, and 陳立奇. "Power Monitoring and Demand Control System Research and Design." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/59825728069396842929.
Full text國立中正大學
通訊工程研究所
99
In the recent years, our nation’s economy has been growing rapidly, as a result people’s living standard is improving. The demand for everything is increasing. Consequently, the peak power usage has increased dramatically. Especially during summer, the amount of power used for airconditioning electricity is significantly high. The peak power usage has also been increasing annually. In contrast, the development of new power systems has been extremely slowly. The growth is insufficient to meet peak loads, thus resulting in imbalance between supply and demand. Thus, power restriction measures must be taken every summer. The current global oil supplies are also running out gradually. The demand for energy is growing, so rising oil prices are inevitable. In addition, due to the lack of indigenous energy, 98% depends on imported energy. The gap between the peak and off-peak power increases every year, resulting in increased electrical power costs significantly. As a result, the government is actively pursuing various energy savings and carbon reduction measures. Adopting new sources of energy such as wind and solar is being encouraged. Although the demand for electricity is increasing every year, environmental consciousness is also growing. Setting up new power plants is becoming quite difficult. Problems due to power shortages can cause significant economic loss. Thus, to reduce supply costs, we must improve equipment utilization and reduce the possibility of power shortages. Power system must be subjected to electric power demand control and management such that the effect on the overall operational procedures is minimized to access efficiency on power monitoring and control optimization. Therefore, in enterprises, schools, and organizations, if effective energy management strategy is implemented, not only the contracted power demand can be reduced, but the electricity expenditure can also be reduced substantially with effective increase in the organization’s competitiveness. Energy-saving management mainly includes the installation of a power monitoring and demand control system. In this Thesis, a power monitoring and demand control system design is proposed. The programmable logic controller (PLC) with multi-function digital power meter are used along with the development of human machine interfaces to integrate the applications created. Based on the power demand, the electrical equipment (load) can be shut-down or restarted. The system can display power usages in real-time via in a personal computer, record the load control into the database, provide history data query and analyze related equipment, thus assisting in the setting, tuning, and planning of equipments’ electricity usage. Experiments show that it can achieve the effect of power optimization and provide guidelines to setup demand contracts.
Chou, Chia-Wen, and 周佳雯. "Complexity Measurement of Process Control in the Nuclear Power Plant." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/15501700579564053852.
Full text國立清華大學
工業工程與工程管理學系
88
Because the nuclear power plant is a big-scale procedural operating system, operators in it have to operate according to standard operating procedures in order to reach the goal of safety and efficiency. However, the complexity of operating procedures may increase the operators’ mental workload, so this research is to realize the complexity of operating procedures and to find out the bottleneck of the procedure for the direction of future improvement. In this research, operation procedures are introduced briefly at first and then some mental workload measurement methods and software/program complexity measurement methods are collected. Next, the concepts of motion study are combined with job evaluation to develop a method to measure the complexity degree of processes. The process complexity measurement method is divided into three aspects, i.e. complexity of executing contents in one step, module complexity and whole process complexity. By the calculation with the method, one can get complexity values of each aspect and whole process complexity value to represent the complexity of the process. Emergency operation procedure 500.3 EOP-RC of the nuclear power plant in Taiwan is selected as an example to conduct the method. At last, the factors affecting process complexity are discussed and the future improvement directions are proposed for further research.
Yung-TaiChou and 周永泰. "Planar MOS Control Diode Components Design and Process Research." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/k2evg4.
Full text國立成功大學
電機工程學系
104
This thesis is to study the design and process of MOS Controlled diode device. At the same time, it sees a Planar MOS Controlled diode device as the main framework to improve the electrical characteristics of the traditional power Schottky diode. (MOS Control diode) in the applications of power electronics has low forward voltage (VF) and lower power consumption of device. Besides, the leakage is lower than traditional Schottky diode under the off state. It performs better and can be operated at higher temperature. Due to the higher leakage of traditional Schottky diode is at higher temperature with higher reverse power consumption. Traditional Schottky reduces its performance rapidly with higher temperature and causes device burn with thermal runaway easily. In this paper, the most important part of the (MOS Controlled diode) structure is the gate oxide to form MOS channel. The gate oxide produces a super barrier and makes major carriers without Schottky’s MS contact. The metal oxide semiconductor gate can adjust the electric potential. This makes the metal oxide semiconductor diode which controls its basic operation principles and with same electrical parameter of Schottky barrier diode. MOS controlled diode has more stable and reliable diode device due to its low consumption. As a result, it is with higher junction temperature Tj can be applied at higher temperature environment.
LIN, KUAN-HSIEN, and 林冠憲. "Research on Integrated Circuit Manufacturing Process Thermostatic Control System." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/33286880553700150167.
Full text崑山科技大學
電子工程研究所
104
In this paper, we research on thermostatic control system of integrated circuit manufacturing process. The thermostatic control system is mainly applied to semiconductor etching process, it includes the refrigerant system and thermostatic control system. Thermostatic control system which used PID and PLC controls refrigerant system to achieve thermostatic balance state of cooling Coolant. We use electric circuit board add in singal to simulate the problems of thermostatic control system and use Arduino microprocessor to simulate temperature diversification.
Shen, Chia-Huei, and 沈洽輝. "Research on Power Control Algorithms over TDMA Personal Communication Systems." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/03899396161267433807.
Full text國立中正大學
電機工程學系
85
Future PCS cellular networks will mainly be driven by high quality channel,high bandwith utilization,low power consumption and efficient network management. Power control is one of the several major techniques which can help to address the goals. Power control technique can reduce cochannel interference and allow as many links as possible to obtain satisfactory reception. The goal of this thesis is to investigate uplink power control algorithms in TDMA cellular systems. Simulation is used as the main tool to explore the performance improvement by power control. In this thesis, the design parameters of PACS (Personal Access Communications System) power control algorithm are verified. Moreover, SIR-Based and SFP (Short-term Fading Prediction) power control methods are also applied to PACS system. Finally, we propose a new power control method named PID (Proportional Integration Derivative) algorithm and apply it to PACS system. PID power control algorithm is proved to be a better choice for TDMA cellular system whose power control delay is about 3-frame interval.
Lin, Shang-Yo, and 林炫佑. "Research on Uplink Power Control Method for Cellular Radio System." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/59074563003637713627.
Full text國立中正大學
電機工程學系
86
DS/CDMA has been proposed to increase the system capacity in cellular radio system. Power control is a key factor to achieve the requirement of high quality and high capacity for DS/CDMA cellular radio systems. In previousreseaches, both of strength- based and SIR-based power methods usually fail tocompensate the variation of short-ter(m fading in accuracy due to the loop delayconstraint. Recently, Wen and Yeh have proposed a downklink short-term fadingprediction-based (SFP-based) power control method to track and predict the trend of short-term fading in time. In this thesis, we further study the behavior of SFP-based power control in uplink. Similarly, we investigate the uplink SFP-based power control method with synchronous and asynchronous modes. Moreover,we further study the effect of different updaing rate for each mobile according to its speed and compare the difference between downlink and uplink SFP-basedpower control methods. Finally, a novel SIR-based fuzzy power control method, with which the desired level of each mobile is adaptively adjusted by a fuzzyrule, is proposed to improve the system performance.
CHANG, CHU-WEI, and 張竹維. "A Research of Remote Control of Power Information Query System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/95692005291995254638.
Full text聖約翰科技大學
電子工程系碩士班
103
In the trend, bath the oil and electric are increasing. How to arrive saving electric and carbon reduction is one of the major issues. The paper puts forward for this topic to issue a approach to improve. Before this time, the most people used electricity information to infer various appliances in equipment in home. In ahead, we can manage the appliances electricity. Through this paper, the user can anytime check the power dissipation to check whether exceeded the restrictions range or not? The implemented system has a smart meter to automatically manage the electricity information. With respecting the traditional power meter that read by human. This implemented work has more efficiently and avoid negligence for peoples so can greatly improve the power management to have more correctly and integrity。Mainly architecture of this thesis is to obtain the power information and to measure by smart meter, and then through the ZigBee transmits to the cloud database, which is established by the SQL. We also employ the C# programming language to create the human-machine interface. So we can easily and directly obtain the electricity situation don’t through the monthly payment amount。
Yeh, Lung-Chuan, and 葉龍泉. "Research on Power Control Algorithms over CDMA Cellular Mobile Systems." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/80406741628657649679.
Full text國立中正大學
電機工程學系
84
ABSTRACT In order to increase the system capacity in cellular mobile system,direct-sequence code-division multiple access (CDMA) techniques havereceived extensive attention as an alternative digital technology option formobile and personal communications. Power control is an effective way ofincreasing the system capacity and quality of communication in the use ofCDMA techniques. In this thesis, we propose two short-term fading prediction-based (SFP)power control method named distributed SFP power control method andcentralized SFP power control method to predict the short- term fading effectaccurately. A computer program is contributed to simulate the performance ofthese methods. Simulation results show that these two SFP power controlmethods can predict and track the short-term fading in time thus improve thesystem performance. Besides, we also consider the effect of asynchron ouspower control, in which the instant that the downlink transmitted power isupdated is assumed to be asynchronous. In addition, we further investigatethe effect of different updating rates for each mobile according to itsspeed on system performance.
Cheng, Tsung-Chieh, and 鄭宗杰. "The Study of Typical Process Loop Control System for Power Plant." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/82125403626304920229.
Full text國防大學中正理工學院
電子工程研究所
91
The typical process loop (TPL) of power plant is simplified and referred to the process loop, which is the type of steam turbine generator on Taiwan Power Company (TPC). It is built of the integrated digital system at the laboratory of integrated design on instrumentation and control, Nuclear Instrumentation Division, Institute of Nuclear Energy Research. The TPL demonstrated the organization of instrumentation and control between final control devices and controllers, and then exhibited the running of power plant. The study is a category of power plant on TPC, a probe into the complete equipment of TPL, and the restriction was imposed on TPL. The application of distributed control system (Foxboro I/A) made the automatic control on water level and pressure of TPL. The analysis of system boundary is accomplished successfully, then to draw up the specification of performance index. The user knows how to manipulate TPL through the workstation of Foxboro I/A implemented the human machine interface. The values of parameters are required to conform proportional and integral (PI) controller’s behavior to the specification of performance index. The parameters tuning is experimenting with Taguchi method to get the optimal values of parameters.
Wang, Chung-Cheng, and 王忠誠. "Research on Lithographic In-line Process Control from Scatterometry Measurements." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/56353516546764590624.
Full text國立交通大學
工學院碩士在職專班半導體材料與製程設備組
97
As lithography technology keep shrinking CD size, the accuracy of CD measurement and process control become more and more important. Improve within wafer CDU also can improve product yield. After photo-resist from DNQ/Nolvolak resist change to CAR (Chemical Amplified Resist), PEB(Post Exposure bake) become the key factor of litho CDU control. For nano-node lithography, traditional CD measurement methodology looks meet the resolution limit of semiconductor component. CD-SEM is from top to bottom measurement, can not provide detail profile information. Unless use cross section method, or can not show the depth data. But this way need to damage wafer also waste a lot time. As the semiconductor technology development, optical scatterometry will be next generation of CD measurement. Currently, the key point of PEB temperature is hot plate thermal controller. But no matter how accurate of hot plate temperature control is, seem still not meet the CDU requirement of nano-lithography. Someone tried to calibrate the PEB temperature by using development CD, in order to make the within wafer CDU better. Whatever, these methods are using SEM by CD measurement. Still need lot measurement point and time for data accuracy. As the optical CD technology improve, the features of accuracy、quickly and more profile information maybe provide the new direction of PEB temperature calibration by development CD. In this paper, the feasibility of improving the within wafer CDU will be discuss by using integrated scatterometry. The target of the works are optical CD match with SEM and PEB temperature calibration by integrated scatterometry for within wafer CDU best.
Yu, Da Yu, and 余大猷. "Research of Process Control in Producing the Brake Pump Housing by the EPC Process." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/45281146135870422533.
Full textHsu, Wei-Yu, and 徐瑋佑. "Optimal Research of Automatic Generation Control for an Interconnected Power System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/79706264503190189431.
Full text中原大學
機械工程研究所
95
In this thesis, the theories of automatic generation control (AGC), which are the major components of generation management system, are discussed. In an interconnected system installed with the AGC modules, the role of the AGC is to instantaneously adjust the generation units so as to keep the power balance between sources and sinks. The generation status of power units under different control modes is monitored by AGC, which in the meantime can balance the needs both for the power consumption of internal controlled area and for the scheduled exchange Mega-Watt (MW) under the safety power dispatch. This study investigates the impact of an integral controller on the two area-power system. Controlled models used in this study are the thermal power plant and the hydro power plant. Generation Rate Constraint and their impacts on the variation of response are accounted for. Simulations of optimization using Simplex Method, Genetic Algorithm, Particle Swarm Optimization, and Linear Quadratic with the aim of reducing the area control error of the system to zero are used in this study. The simulated results obtained from this study indicate that for the system frequency, its transient response is small and its steady-state response converges to zero pu quickly.
Lee, Chia-Tse, and 李佳澤. "Research on the Droop Control of Power Converters for Microgrid Applications." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/90954172566809936975.
Full textYeh, Ja-Ming, and 葉家銘. "Research and Development of Intelligent Power Management with DSP Control Unit." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/82945141400642553318.
Full text國立中山大學
電機工程學系研究所
91
This thesis is to design an intelligent battery charger and residual capacity estimator with DSP. This system uses the proposed structure of the series circuit and battery equalizer with the intelligent fuzzy charge algorithm to charge battery, The internal resistance measurement can accurately estimate the residual capacity of battery. Because of using the intelligent fuzzy charge algorithm, it can give different charging current depends on voltage, capacity and temperature of battery. Because of using battery equalizer, it can adjust the voltage of battery to guarantee the battery be charged safely. According to experimental results, the charger can achieve the goal of fast and uniform charge within 6 to 8 hours. On the residual capacity estimator, We measure internal resistance to accurately estimate residual capacity of battery, because internal resistance is affected by environmental temperature, battery corrosion, aging factor and output current .
Yang, Shu-Fen, and 楊淑芬. "Research of The Process of 90''s Journal and its power flow." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/86812876493203983721.
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