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1
Miura, Takeshi. "Study of Microwave Power Receiving System for Wireless Power Transmission." 京都大学 (Kyoto University), 2000. http://hdl.handle.net/2433/180901.
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Pan, Xia. "A study of power transmission in actively controlled simple structures /." Title page, contents and introduction only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09php1869.pdf.
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Sahr, Kristian S. "A curriculum need study for alternative power transmission systems in Wisconsin high schools." Online version, 1999. http://www.uwstout.edu/lib/thesis/1999/1999sahrk.pdf.
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Williamson, Mark R. "A study of propagation at 60GHz for future indoor wireless networks." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288259.
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Szweda, Timothy Andrew. "An Experimental Study of Power Losses of an Automotive Manual Transmission." The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1217347492.
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Mitani, Tomohiko. "Study on Noise Features of Magnetron and Low Noise Wireless Power Transmission." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/77788.
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Hasegawa, Naoki. "Integral Study of GaN Amplifiers and Antenna Technique for High Power Microwave Transmission." Kyoto University, 2018. http://hdl.handle.net/2433/232041.
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Miyasaka, Juro. "Study on Microwave-Driven Electric Vehicle for Agriculture." Kyoto University, 2014. http://hdl.handle.net/2433/188749.
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Kyoto University (京都大学)0048
新制・論文博士
博士(農学)
乙第12823号
論農博第2796号
新制||農||1025(附属図書館)
学位論文||H26||N4818(農学部図書室)
31310
京都大学農学研究科農業工学専攻
(主査)教授 清水 浩, 教授 近藤 直, 教授 飯田 訓久
学位規則第4条第2項該当
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Okafor, Chukwuemeka. "Electricity generation, transmission and distribution policy: a comparative study of Nigeria (1960-2011) and South Africa (1960-2011)." Thesis, University of Fort Hare, 2013. http://hdl.handle.net/10353/d1007049.
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The electric power policies in Nigeria and South Africa are considered the governments’ intention to provide quality and affordable electricity to the people. A comparative study on the electric power policies focuses on the similarities and differences in the policy approaches, the policy issues that affect electrification, and the impact of the policy issues in achieving the goal of universal access to quality and affordable electricity power in both countries. The methodological approach allows for an in depth textual study on the electric power policy documents in both countries. In Nigeria, the government intends to address the massive demand-supply imbalance and achieve the goal of electrification through reforms that focus on private sector-led growth in the sub-sector. In South Africa, the identification of electrification as a public problem by the post apartheid government leads to an integrated policy framework that focuses on balancing economic concerns with social and environmental considerations. The study identifies electricity provision as a social welfare responsibility of the governments in both countries and examines the policy issues in the context of public welfare. In Nigeria, the policy issues are found to be self serving and not in line with sustainable public interest, given the socio-economic challenges. As a result they, exert less impact on achieving the goal of universal access to quality and affordable electricity in the country. In South Africa, good governance in the sub-sector has enabled the identification of policy issues in line with sustainable public interests of social equity, poverty alleviation and environmental sustainability; and government using public administration agencies to play a key role in service delivery. Recommendations of the study mainly derive from the South African experience on electrification, and are intended to offer some policy-lessons to Nigeria in the sub-sector. The study contributes to new knowledge in the discipline of public administration by opening up new vistas for a comparative analysis of electric power policy issues in both countries in the context of public welfare. Besides, a comparative study on electrification in Nigeria and South Africa from a policy angle contributes to the existing knowledge base in the discipline.
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Roongsita, Somsak. "Simulation and study of harmonic interference in power line communications." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/101256.
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Power line carrier (PLC) is one of the communication and load control (C&LC) techniques employed in direct load control. A PLC is, within itself, a communication system. It utilizes power transmission line as a medium of transmitting control functions, and relaying. High frequencies, in the order of 30 to 300 kHz, are used. Power line carrier systems are, at present, the most attractive C&LC systems.
Recently, dispersed generation - photovoltaics, wind energy, small scale hydro - is introduced to power systems. The introduction of small scale dispersed generation sources degrades the performance of PLC systems by injecting dc-ac inverter related harmonics into the distribution lines. These harmonics interfere with PLC signals. Thus load control functions assigned to PLC systems are affected.
It is the purpose of this research to study how a PLC signal propagates through the transmission line and how it is affected by the harmonic interference. An experiment is conducted using a distribution network provided by the Jet Propulsion Laboratory discussions, and conclusions are presented.M.S.
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Rahman, A. K. M. Zami-Ur. "An Ex Ante Probabilistic Study of Market Power with Emphasis on the Transmission Constraints." Thesis, KTH, Elektriska energisystem, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-47840.
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After the deregulation, the electricity markets have been restructured in a way to draw an end to “natural monopoly” of the players. However, by the virtue of the especial nature of electricity market, it gives the players instincts to exercise the market power. As a result of these market power exercise, electricity market becomes inefficient. The presence of market power can change the dispatch order of generators, pressure to over-build transmission networks in order to relieve load pockets in a market. Perhaps most importantly, the exercise of market power results in power price rises and substantial wealth transfers between electricity customers and generators. For these reasons, electricity market regulators around the world tend to be interested in mechanisms for predicting marker power ex ante and detecting and controlling the exercise of market power ex post. At present, there are some indicators, used to predict the market power exercise ability of suppliers. These common ex-ante market power indicators however, mostly disregard power transfer distribution factor, generation and transmission constraints in electric systems and merging effect of the supplier. Moreover, these indicators usually concern static measurement of market power, when electrical power system reflects stochastic nature regarding load and wind generation capacity variation in any system. This master thesis suggests a probabilistic approach of a new market power indicator namely Transmission constrained-Pivotal Supplier Index (TC-PSI) to predict the probability of market power exercise for variation of loads and wind generations with considering generation and transmission constraints in a system.
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Toh, Leng Huei. "A follow-up study on wireless power transmission for unmanned air vechicles [sic vehicles]." Thesis, Monterey, Calif. : Naval Postgraduate School, 2007. http://bosun.nps.edu/uhtbin/hyperion-image.exe/07Dec%5FToh.pdf.
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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, December 2007.Thesis Advisor(s): Jenn, David C. "December 2007." Description based on title screen as viewed on January 24, 2008. Includes bibliographical references (p. 85-88). Also available in print.
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MARZANO, LUIZ GUILHERME BARBOSA. "STUDY OF REACTIVE POWER COST ALLOCATION METHODOLOGIES IN TRANSMISSION SYSTEMS IN A COMPETITIVE FRAMEWORK." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1998. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9298@1.
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CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCENTRO DE PESQUISA DE ENERGIA ELÉTRICA
Este trabalho faz um estudo de várias metodologias de partição de custos em ambientes competitivos, com o objetivo de se propor algoritmos para a repartição do custo de suporte de reativo entre os diversos acessantes. Entre as várias metodologias estudadas, como por exemplo Nucleolus, Principio da Decomposição e Valor de Shapley, será verificado que o método de Aumann-Shapley é o mais adequado à repartição do custo de suporte de reativo, já que é baseada em custos marginais, bastante compatíveis com um ambiente econômico competitivo. Técnicas de otimização são de extrema importância para aplicação da metodologia de Aumann-Shapley, porque fornecem os multiplicadores de lagrange necessários ao cálculo dos custos marginais de potencia reativa, que são utilizados na repartição de custos de Aumann-Shapley. Neste sentido, é apresentado um algoritmo de pontos interiores, através do qual também se obtém o custo total de suporte reativo. Dois algoritmos para a repartição do custo de suporte de reativo serão então apresentados, um para aplicação ao caso determinístico e outro para o caso estocástico, de modo a se considerar s ocorrência de contingências na rede elétrica. A metodologia proposta é ilustrada em estudos utilizando- se dois sistemas teste: um de 24 barras e outro de 1653 barras.
This work presents the study of some cost allocation methodologies in a competitive framework and proposes algorithms to reactive cost allocation among transmission consumers. Among the studied methodologies, e.g. Nucleolus, Decomposition Principle and Shapley Value, the Aumann-Shapley methodology will be shown to be the most adequate in sharing the cost of reactive support, due to its basis in marginal cost compatible with and economic competitive framework. Optimization techniques are very important to Aumann- Shapley methodology application, because the supplied Lagrange multipliers are extremely important to the evaluation of reactive power marginal cost, carried out in Aumann-Shapley cost allocation. Besides that, an interior point algorithm will be presented, which is used to obtain Lagrange multipliers and to determine the reactive support total cost. Afterwards, two algorithms will be presented to reactive power support cost allocation, one to be applied in a deterministic case and the other to a stochastic case, where contingencies in a electric network are taken into account. The proposed method is illustrated in studies with two electric test systems: one composed by 24 buses and other by 1653 buses.
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Sinha, Rajeshwari Mishka. "A history of the transmission of Sanskrit in Britain and America, 1832-1939." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610357.
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Wang, Ce. "Study on Novel Rectifiers for Microwave Wireless Power Transfer System." Kyoto University, 2020. http://hdl.handle.net/2433/253503.
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Ng, Kwok-kei Simon. "A game-theoretic study of the strategic interaction between transmission and generation expansion planning in a restructured electricity market." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B39343534.
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FALEYE, OMOBOBOLA. "Modelling Demand Uncertainties in Generation-Transmission Expansion planning : A case study of the Nigerian Power System." Thesis, KTH, Elektriska energisystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-91523.
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The Nigerian power system is one plagued with incessant load shedding due to inadequate generation and transmission capacities. Currently, less than 40% of the population is connected to the national grid and less than 50% of the available installed capacity is actively used in meeting demand. A new wave of energy reforms is on-going in the nation. There are proposed generation and expansion plans. These reforms have only fully taken into consideration present demands and not future energy demands. This means that even with new plants and transmission lines being constructed; there may still be inefficient generation and transmission capacities due to demand increase. This thesis models the uncertain future demands in the integrated generation-transmission planning model. An optimal investment plan is found using the deterministic optimization model of integrated generationtransmission planning. A decision analysis method was initially used to study the introduction of uncertain demand into the deterministic model. Then, a two-stage stochastic model of the generation-transmission planning taking into account uncertainties in energy demand is developed using scenario-wise decomposition method. The demand was modelled as taking discrete values with certain probabilities. These models are mixed-integer linear programming problems. They are implemented in the GAMS platform and solved using the CPLEX solver. A stylized version of the Nigerian power system is developed and tested. A thorough analysis and comparison of results from the models were carried out using the developed version of the Nigerian transmission grid.
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Durrant, Martyn. "VSC HVDC power transmission control a case study in linear controller design for uncertain nonlinear plants." Aachen Shaker, 2007.
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Leblanc, Simon. "Le Deutéronome, la famille et la transmission de la loi en Israël ancien." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19657.
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The book of Deuteronomy turns out to be very interesting for the study of passing on religious traditions within family. On the one hand, with a canonical approach — i.e. an approach where the function of a biblical text within the canon is emphasised over die history of this text - Deuteronomy acts like the hermeneutical key explaining how the new generations must face and actualise the Torah — the principles of life and conduct given by the Lord to His people. On the orner hand, the content of Deuteronomy represents the family as the privileged place, or rather die "vehicle" by which die Torah will be handed down to the next generation.
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Novotny, James A. "A study of introductory power mechanics courses in the state of Indiana." Virtual Press, 1987. http://liblink.bsu.edu/uhtbin/catkey/486517.
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The purpose of this study was to determine what knowledge of energy systems the students currently enrolled in Introductory Power Mechanics courses in the public high schools of Indiana possess, where they acquired such knowledge, and what the instructors' emphases in the course were.Two questionnaires were used in this study. The first, a thirty-item questionnaire, was utilized to determine what the students know about energy systems and where they learned what they know. The second one was a nineteen-item questionnaire to determine the instructors' course emphases.The null hypotheses were tested using a one way analysis of variance and a Scheffe Test. The .050 level of significance was used as the critical probability level for rejecting the hypotheses.
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Ng, Kwok-kei Simon, and 吳國基. "A game-theoretic study of the strategic interaction between transmission and generation expansion planning in a restructuredelectricity market." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B39343534.
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Wei, Nan. "A Line Outage Study for Prediction of Static Power Flow Redistribution." Thesis, Virginia Tech, 2016. http://hdl.handle.net/10919/72887.
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Transmission line is a crucial role in power transmission network which connects generating units to consumers. Some unpredicted failure events such as lightening or system faults can cause transmission line tripped, which may bring about a large interruption to the system and causes damage. When line outage happens, the power flow on the tripped line will be redistributed to the rest of lines in the system. It may cause risk of overload happens on other lines, and results in a cascading failure and system collapse. Reasonably, a single line outage will not affect all other lines in the system. Therefore, when a line outage happens, it is important for the system operator to have a preview of which lines will have serious impact and which lines will not, so that the operator can only focus on monitoring certain lines which will be seriously affected, rather than keeping monitoring the whole system. In this thesis, A Line Outage Distribution Factor (LODF) method is proposed and implemented in the IEEE 118 bus system to estimate active power flow redistribution after a line outage. After that, a definition of Thevenin electrical distance between two transmission lines is derived and applied to calculate electrical distances between the outage line and each line in the system. An exponential convergence tendency is found between maximum possible LODF predicted power flow variations and electrical distance, and an exponential regression method is applied to analyze this tendency. The contribution of this work is a rule has been found that starting from the outage line, the maximum possible active power flow variation on transmission lines exponentially decreases exponentially while the electrical distance increases. With only the information of system's normal operating condition and topological information, the maximum possible active power change on each lines caused by single line outage, and the margin of the impact of single line outage on power flow variations may propagate along electrical distance can be easily and quickly predicted. Ultimately, the goal of this work is to allow operators at the control center can concentrate on lines within a certain electrical distance instead of keeping monitoring the whole system when a line outage happens.Master of Science
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Harreveld, Roberta Elizabeth, and b. harreveld@cqu edu au. "Brokering Changes: A study of power and identity through discourses." Central Queensland University. Education & Innovation, 2002. http://library-resources.cqu.edu.au./thesis/adt-QCQU/public/adt-QCQU20040323.163833.
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Brokering Changes refers to the ways in which teachers broker their compliance with a new literacy knowledge base for adults. This thesis reports a study of twenty-three members of a cohort of adult literacy teachers working in regional, rural and remote communities throughout Central Queensland from 1996 to 2001. It details the performance and recognition work that these teachers did as they negotiated their way through a large curriculum reform as literacy was redefined from something that was negotiated as useful for the learner to something that is named and mandated by the state.
The theoretical framework engages with interrelated notions of power, discourse and identity with supporting conceptualisations of ideology, work and pedagogy in the production and exercise of disciplinary power as understood through the thinking of Michel Foucault (1984). The methodological approach deploys James Gees (1991, 1992, 1993, 1996a, 1996b, 1997, 1999) particular socio-cultural theory of D/discourse. Spoken, written and observed data are analysed using Gees (1993, 1999) interrelated linguistic systems analysis method.
The major finding is that these teachers actively broker the effects of these changes through their professional practices. This study is an important contribution to the literature concerning the professional lives of teachers of adults in an era of fast capital and performance-based government. Significantly, the research provides important insights into the problems faced by teachers who are confronted with the implementation of major curriculum reforms while living far removed from the networks and activities of the system in which they worked.
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Tomiyama, Elias Kento 1981. "Estudo do aspecto locacional da alocação de custos da transmissão = Study of the locational aspect in the transmission cost allocation problem." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/262018.
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Orientador: Carlos Alberto de Castro JúniorDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação
Made available in DSpace on 2018-08-21T03:54:49Z (GMT). No. of bitstreams: 1 Tomiyama_EliasKento_M.pdf: 3080864 bytes, checksum: 7293fe7b3271c5c27e9b967c48a4e245 (MD5) Previous issue date: 2012
Resumo: Esta dissertação de mestrado apresenta quatro metodologias de alocação de custos da transmissão: Pro rata (PR), Divisão Proporcional (PS), Zbus-médio (Zbus_AVG) e Nodal. Enquanto a primeira desconsidera o aspecto locacional e aloca os custos baseado apenas na quantidade de potência produzida pelos geradores e consumida pelas cargas, as últimas três levam em conta este aspecto, ou seja, as tarifas pagas por geradores e cargas dependem do seu ponto de conexão na rede elétrica. Através de simulações computacionais são levantadas várias situações de operação no sentido de avaliar a influência e as possíveis implicações de ordem regulatória, política, econômica e social de um país provocadas pela inclusão do aspecto locacional na definição das tarifas de uso do sistema de transmissão. Por fim, mostra-se a possibilidade de se considerar as tarifas pagas pelos agentes do sistema como um critério de decisão a mais no problema do planejamento da expansão da transmissão
Abstract: This dissertation describes four transmission cost allocation methodologies: Pro rata (PR), Proportional sharing (PS), Zbus-average (Zbus_AVG) and Nodal. While the first one disregards the locational aspect and allocates costs based only on the amount of power delivered by generators and consumed by loads, the last three ones take this aspect into account, i.e. charges are dependent on where generators and demands are connected in the network. Several computer simulations were made in order to assess the influence of the locational aspect into transmission pricing scheme and the results were used for a critical analysis, including political, regulatory, economic and social aspects. Finally, we discuss the possibility of using the fees paid by transmission system agents as an additional criterion for the Transmission Expansion Planning problem
Mestrado
Energia Eletrica
Mestre em Engenharia Elétrica
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Okubo, Hitoshi, Masahiro Hanai, Naoki Hayakawa, Fumihiko Kato, and Hiroki Kojima. "Feasibility Study on a High-Temperature Superconducting Fault-Current-Limiting Cable (SFCLC) Using Flux-Flow Resistance." IEEE, 2012. http://hdl.handle.net/2237/20734.
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Orr, Kevin. "College cultures and pre-service trainee teachers : a study in the creation and transmission of ideas about teaching." Thesis, University of Huddersfield, 2009. http://eprints.hud.ac.uk/id/eprint/9239/.
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This thesis analyses the college placement element of pre-service initial teacher training (ITT) and its impact on ideas about teaching in Further Education (FE). It considers both trainees and serving teachers to investigate this impact on ideas in relation to individuals’ experiences of placement and in relation to ideas held in general society by distinguishing cultures and questioning how they each shape notions about teaching. The placement experience is examined within the broad context of work-based learning (WBL) and the thesis draws on and assesses the explanatory power of three theorisations commonly adopted within WBL research; communities of practice; Cultural Historical Activity Theory; and Bourdieu’s concepts of field and habitus. Though trainees’ experience of the placement is characterised by messiness and diversity, the small groups they work within at colleges generally cannot be defined as self-sustaining cultures. Moreover, ideas about teaching held in society are often more influential on trainees’ development than the particular situation of their placement during training, even where trainees are placed within distinctive cultures. Trainee and serving teachers in FE, therefore, experience a hierarchy of influences, including government policy, as well as concomitant tensions between agency and control, all relating to the unequal structures of society. This understanding exposes the weakness of some theorisations in describing how ideas about teaching are formed and disseminated. This thesis argues that the Marxist concept of alienation more adequately describes the situation of trainees and teachers in FE and the formation of their ideas and practice. It finally argues for ITT for FE to be constructed around a body of professional knowledge as a counterbalance to the limitations of the experience of placement.
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Durrant, Martyn [Verfasser]. "VSC-HVDC Power Transmission Control: A Case Study in Linear Controller Design for Uncertain Nonlinear Plants / Martyn Durrant." Aachen : Shaker, 2008. http://d-nb.info/116434241X/34.
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Hekandjo, O'Brien Alexander. "The financing of power transmission interconnector projects : a case study of viable financial packaging utilising project finance principles for the Southern African Power Pool (SAPP)." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/95592.
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Thesis (MBA)--Stellenbosch University, 2012.Over the past few years the Southern African Development Community (SADC) has been facing regional power shortages. These regional power shortages currently being experienced within the SADC region have been partly due to a lack of generation capacity and transmission capacity constraints. This situation has been further aggravated by the unanticipated economic growth within the SADC region. In order for the SADC region to meet its electricity demand, the region needs to invest in new generation and transmission projects. However, due to the inability of regional utilities to raise funds to finance these projects, the projects tend to not reach financial close resulting in the increase of the regional power deficits. Although these regional power shortages have been attributed to the lack of adequate investment in power generation projects and power transmission interconnector projects, this research report was limited to the development and financing of power transmission interconnector projects. The objective of this research report was to identify the dynamics that prohibit regional power transmission interconnectors from reaching financial close and to recommend possible solutions on how best to develop and package these projects. The research used the proposed developmental approach of the ZIZABONA transmission interconnector project as a case study to develop a generic model that could be utilised on other regional transmission interconnector projects. Based on the research presented in this research report, the study has highlighted project finance as a viable funding strategy. Regional utilities can utilise this funding strategy to package and finance joint transmission regional interconnectors to alleviate the current regional power shortages by facilitating regional electricity trade.
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Hayakawa, N., H. Kagawa, and H. Okubo. "A system study on superconducting fault current limiting transformer (SFCLT) with the functions of fault current suppression and system stability improvement." IEEE, 2001. http://hdl.handle.net/2237/6749.
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Chen, Hon-Zon, and 陳宏榮. "Development of Wireless Power Transmission for Implantable Biomedical Microsystems and Study of Power Transmission in Bio Tissues." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/24633365014285484989.
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碩士中原大學
醫學工程研究所
92
Abstract The power energy of bio-implantable microsystems can be provided from (1) conventional wire cord, (2) battery, and (3) an external power transmission system. Unacceptable problems of cosmesis, maintenance, and infection hinder the wire cord development. Life-span issues of battery technologies limit its applications in bio-implantable Microsystems. The advantages of the external power transmission system include continuous availability of power to an implanted unit, and ability to control the implanted unit with the external device using the same radio frequency (RF) link. However, the wireless power transmission systems use RF techniques which the carried power can be attenuated by tissues. Thus, a common question is raised that for a given communication bandwidth how far away the microimplant can be positioned underneath bio tissues so that the microimplant can properly function as it is designed for. In this research course, we developed a wireless RF power transmission/receiving system to investigate the issue stated above. A major component in the system, a class E power amplifier, is introduced. Four RF resonant frequencies to transmit power in a fashion of electromagnetic wave (EM) were implemented. Protocols of studying power transmission in air and in pork were designed. Instead of human body, this study used pork as bio tissues for the experiments. Our study results prove that for the coil based power coupling technique transmission efficiency of low frequency EM is less than that of high frequency EM. However, the decreasing speed against distance (or thickness of medium) is slow for low frequency EM comparing with high frequencies. In other words, low frequency EM waves have better penetration capability. In addition, the study results demonstrate that for all used frequencies high dielectric constant (ε) media such as pork lion attenuate power most. The power attenuation rate of high ε, on the other hand, is slower when the thickness increases comparing with low ε. Most importantly a mathematical model (i.e. assessment model) that can be used to assess power received beneath bio tissues was developed. By using this model, when a microimplant to be placed within bio tissues, its position, in terms of thickness of the bio tissues, and the power received can be easily obtained.
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Chang, Wei-Lian, and 張威廉. "Study on Public Transmission Right of Teacher’s Teaching." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/00260328593533626580.
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碩士國立臺北教育大學
教育經營與管理學系文教法律碩士班
104
Abstract Though the provisions of Copyright Law have provided the teacher in fair use with the internet to obtain or transmit the digital materials or the contents of a work, there were still many cases of internet teaching involved copyright infringement. The court’s judgement on copyright law almost focus on the fair use of “right of reproduction", the "right of public transmission” was less addressed. At present, the education policy of various countries is more concerned the school how to achieve more intelligent and creative effectiveness of teaching. The developed countries focus their attention on the cloud computing for teaching and learning. Use of the internet in teaching and learning will be education trends in perspective. The cloud computing is still a developing technology and conception, but it has become more widely used in real life. Today the data can be transmitted by internet directly without through the process of reproduction, and the connection of cloud computing for teaching and public transmission is more linkage. On account of the relative interpretation of copyright laws by the Intellectual Property Office had an inclination to protect the right of copyright owners, the teacher therefore use Internet or cloud computing teaching activities or materials transmission are often worried about copyright infringement, the topic is worth paying more attention to. This study from the perspective on public transmission’s right included exploring the suitable for use in copyright law that concerning the fair use of internet or cloud computing teaching. Meanwhile, the author also made thorough inquiry into the connotation and the constitutional point of view that concerning public transmission’s right, and explored public transmission’s right, cloud computing as well as MOOCs, separately. The research also studied the different teaching patterns of digital learning and digital library, it was also trace the relevant legal system of other countries. The ultimate aim is to look into the legal impact and the significance of the teacher who use internet as a teaching tool. Key words: cloud computing for teaching, copyright, right of public transmission, digital learning, learning platform, fair use
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Yi-Shin, Wu, and 吳宜欣. "A Study on Transmission Properties of Power Line." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/10733013922542234833.
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碩士國立臺灣科技大學
電機工程系
92
The transmission properties of the power-line communications are studied to evaluate the possible applications of the power-line communications for Taiwan Power Company. The related regulations and current developments of the power-line communications are collected for references. Also, the transmission properties of the Taipower distribution systems are measured, and signal attenuation and impedance matching are evaluated. The transmission models of the power-line carriers are applied in order to analyze the signal propagation. Besides, measurements of the electromagnetic interferences due to the power-line carriers are performed and the noises possibly interfering the power-line communications are studied. Results obtained from this project may be applied in planning and deploying the power-line communications systems for Taiwan Power Company.
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Tu, Ming-yu, and 杜明育. "Study on Contactless Power Transmission for Linear Track." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/95844209491791457544.
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碩士國立成功大學
電機工程學系碩博士班
95
The design and implementation of contactless power transmission for linear track system are presented in this paper. Based on the character of inductive power transmission without the need for power wire or metal contact of the conventional device, the design is mainly aimed at the track of specific demand to construct the inductive power transmission system. It also can acquire the sustained energy and signal transmission for the mobile apparatuses. In the system, the single-stage full-bridge is utilized to inverter with the property of ZVS, driving selectively the inductive winding of linear track consisted of five components. The energy transmission structure is chosen to verify the feasibility of coupling structure of coaxial winding. Besides, PIC16F876A is adopted to run the selective arousing system for the section winding and control the frequency conversion. As a result, it is disclosed that the system can provide the energy for the moving load with the comparative location which is commanded by the controlling signal from primary frame.
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Chen, Sheng-Jian, and 陳勝建. "Study on Contactless Weaving-Type Power Transmission Track." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/22404658602631563609.
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碩士國立成功大學
電機工程學系碩博士班
97
This thesis investigates the novel inductive coupler of contactless inductive power transmission track for moving vehicle. And the proposed coupler is a weaving-type. Because there is no wire connection for power supply, the motion of the vehicle is unrestricted. At first the different coupling structures are simulated and analyzed. Then the weaving-type inductive structure is used to build a contactless power transmission track. In order to improve the transmission efficiency, the appropriate resonant circuit is chosen and selective excitation is adopted. The primary side circuit utilizes microcontroller to achieve section excitation for employing track effectively as well as control the frequency of the system to reduce the power loss. In addition, in order to induce the sufficient power for the motor and Li-Polymer battery, the pick up is excited selectively according to the position on the track. Finally, by simulation and experiment, the contactless inductive power transmission track system is accomplished.
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Lin, Chyi-Taur, and 林祺濤. "A Study on Data transmission by Power Line." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/07881770229968358481.
Full textAbstract:
碩士國立高雄第一科技大學
電腦與通訊工程所
91
A Study on Data Transmission by Power Line Student：Chyi-Taur Lin Advisors：Dr. Wei-Chih Hsu Department of Computer and Communication Engineering National Kaohsiung First University of Science and Technology 英文摘要 ABSTRACT This paper presents a characteristical measurement of power line to probe the possibility as a kind of communicational medium. The electric potential attenuation of power line against frequency has been measured by means of signal generator, frequency counter, and ocsilloscope. We wrote a program to measure the byte-loss rates of the server-to-client data transmission on the power lines with different lengths. Besides,we also investigated the influences of no-fuse breaker and the power with different phases on data transmission. In application, we constructed a PC-based power line communicator to control a programmable message sign. The alphanumerical characters were sent from the computer to the message sign for display. We also programmed a timing corrector to actively or passively transmit the date and the time of the server computer to the client computer for alignment. The experiments show that power line is capable of data transmission. The experimental results reveal that the electrical attenuation of power line varies with frequency. The transmission distance and the numbers of connected appliances also affect the loss rate of data transmission.
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HUANG, JUN-DA, and 黃俊達. "Study of power-transmission reduction in truss-structural networks." Thesis, 1992. http://ndltd.ncl.edu.tw/handle/38272274404433621984.
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Lee, Yi-Ying, and 李依穎. "Study of Contactless Power Transmission Techniques for Mobile Apparatuses." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/82433606222419528905.
Full textAbstract:
碩士國立成功大學
電機工程學系碩博士班
94
This thesis presents a contactless power transmission system for mobile apparatuses. The proposed system comprises primary power inductive circuits, control signal circuits, and secondary receiver circuits. The contactless power transmission system transmits electrical energy and signal without electrical connection or physical contact between the source and mobile apparatuses. In this thesis, a 13 cm × 15 cm coil array is made, which is used to produce uniform magnetic field, therefore mobile apparatuses could constantly device electrical energy. MAXWELL® is used to analyze and design the inductive coil array. Finally, the performance of proposed contactless power transmission system was proved mobile apparatuses could move above 5 mm on the coil array.
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Chen, Zheng-Yong, and 陳政勇. "Study on intelligent power supply system using inductive transmission of power and information." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/78878378105133205921.
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Hsu, Hsiau-Yuang, and 許校源. "A Study on Transmission Loss Attributed to Independent Power Producers." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/82478514106892023316.
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碩士國立臺灣科技大學
電機工程系
89
Recently, the trend of deregulation has been world-widely adopted. Under this trend, many countries including Taiwan have deregulated their electrical industry. This circumstance makes the appearance of the Independent Power Producers (IPP). In the perspective frame of deregulation in Taiwan, IPP can adopt the way of wholesale, wheeling or self-built lines to supply electricity. The former two ways will utilize the transmission networks of other utilities. Therefore, it is an important issue to fairly allocate the transmission loss to each IPP for pricing purpose. In this thesis, it is assumed that IPP is liable for the corresponding transmission loss resulted from its own generation. Based on the system information collected from state estimation program or other means, the fictitious transactions can be established by using a proportional allocation algorithm. These transactions are then transformed into bus injection currents in order to obtain the corresponding transmission losses. The method is tested on 6-bus and 26-bus systems. The simulation results show that the distribution of power and the allocation of losses are physically reasonable. The effect of various selection of swing bus is avoided by the current injection concept. In addition, the converge rate of the algorithm is also a strong point. All these advantages make the proposed method a valuable approach for further study.
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蔡昌翰. "The Study of Wireless Power Transmission Applied to EV Infrastructure." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/91294521368847483873.
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碩士國立交通大學
科技管理研究所
100
Due to global warming, rising oil prices and other factors, electric vehicle is becoming a high-profiled R&D projects in automobile industry recent years. However, one of the key factors to popularize EV in public use is the completion of the infrastructure of EV. The most common charging facilities of EV adopt physical connection, recently, the concept of replacing physical connecting charging by non-contact charging has been proposed. If the development of NPT(non-contact power transmission) applied on EV infrastructure goes on, the future vision of EV on the basic of NPT may be very different from the ideas today. In this study, we focused on the infrastructure of EV, NPT technology and its applications in the fields of EV infrastructure by surveying literatures and data to develop possible issues may confront in the process. According to the issues, we will ask some specialist for their opinions to depict the forward-vision of NPT applied on EV development.
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Chen, Jia-Yu, and 陳家羽. "Study on Power Line Communication System Design For LED Transmission." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/62796597973616447713.
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碩士國立暨南國際大學
電機工程學系
99
This thesis is discussed power line communication applications in the LED package which is contain RGB tricolor to complete the changeing of color dimming.The circuits are divided into two architecture power line communication and the second is LED control circuit. This thesis is using On Off Keying（OOK）modulation and single chip to complete 12bits digital signal which can be controled in the power line communication. The digital signal and the 125KHz of pulse wave signal are multiplied to produce the OOK modulation signal. Line driver with high driver current tolerate are used to connect with the transformer and then couple to the power line. OOK modulation signal is restored to digital signal through transformer, band pass filter, automatic gain control（AGC）circuit, demodulator circuit and comparator in receiver circuit. In the LED part, 12bits PLC signals will be seperated into 3 equal portions were used to RGB LED, each color has 24 variations, so after mixing and blending colors will have （24）3 colors. Because the type of mixcolor is use to pulse width modulation（PWM） so the PWM width is 6.7 %.
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Wu, Ming-Hsueh, and 吳明學. "Study on the Power Transmission for Power Take Off (P.T.O.) of Tractor under Various Speed." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/uzqkn4.
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碩士國立嘉義大學
生物機電工程學系研究所
106
Agricultural machinery is a very important support in the development of modern agriculture. Agricultural tractor as the main power source of agricultural machinery, its performance directly affects the whole development of agricultural mechanization. The tractor power output shaft (Power Take-off, "P.T.O.") test is the important performance testing items for determination of the economic, dynamic and index stability of tractor. This study analyzed the data of P.T.O. horsepower test and discussed the effects of rotation speed on torque and working temperature of the engine by statistical analysis of regression. The test results and the characteristic curve of a standard tractor were tested with the P.T.O.-HP test platform (FROMENT XT200) for the tractor, and the result was verified that the P.T.O. Test Bench could achieve the default performance test items and the related parts of the control system could also be well operated. The test platform, with easy operation and high control precision, can shorten the test cycle and increase the work efficiency. The further promotion and upgrade of the test platform have a solid foundation. This test platform is able to not only evaluate and analyze the performance of power output shaft of tractor, but also determine the effects of various external factors on the tractor. This P.T.O. HP test platform would play a very important role in the tractor performance test, as well as handling the customer’s dispute regarding horsepower.
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Lee, Jinn-Yun, and 李進雲. "The Study for Effects of Electromagnetic Pulse on Power Transmission Lines." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/46026819126502514471.
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碩士逢甲大學
電機工程所
92
Abstract With the high energy and intensive electric field of EMP burst, it can spread out broadly and propaganda to far distance, even tens miles away through the power transmission lines. Thus, the protection of power transmission lines for the EMP impact will become an most important task in the EMP research field. No doubt, this is also the main purpose of this thesis. The fundamentals of electromagnetic field are firstly discussed in this thesis. Later, the effect of EMP coupling to transmission lines is described and the model of transmission line is also introduced and derived. Finally, the 345KV transmission line of Taiwan Power Company is simulated by the transmission line model derived in this thesis. The simulation results show that the EMP transmission line model can be aided to analyze and design the protection of EMP impact. Moreover, the completion of this thesis can bring more strength for electric power system in Taiwan, and more benefits for those manufactures of high energy switches. Keywords：EMP, Transmission Lines
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Lin, Wei-Che, and 林維哲. "Study on Assessment Method of Regional Power Transmission Grid Planning Projects." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/ueq6ds.
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碩士國立臺灣科技大學
電機工程系
104
This study aims to explore the regional power transmission grid projects to set up their assessment method of planning. Other than satisfy load demand in the given future and removing the foreseeable bottlenecks, regional power transmission grid planning and establishment plays a more important role in reducing circuit losses and uplifting power supply reliability and quality. Satisfying the future load demand and removing the foreseeable bottlenecks is the basic issue for building up the regional power transmission grid. First, it is essential to find the reliable mesoscale mid long term load forecasting. Next, the bottlenecks of regional power transmission grid year after year need be grasp. Bringing up the proper and feasible assessment method of planning to satisfy the future load demand. Furthermore, it is essential to completely grasp the assessment about the feasibility and suitable construction period of potential transmission lines. Finally bringing up the planning project step by step to obtain the expected effect. This study aims to investigate the regional power transmission grid projects to set up their assessment method of planning. It can effectively assess each planning’s feasibility and construction period by systemic method and assess financial and economic effect of planning project to serve as the basic of decision and reference for regional power transmission grid planning. First of all, this study integrates and explores the framework of the current trends of power transmission grid planning method, assessment process and technology development domestically and abroad, which can serve as the reference and foundation for this research. Besides, this study explores the characteristic of regional power transmission grid to establish the suitable assessment method of regional power transmission grid planning. The assessment method based on load forecasting in the given future to assess the feasibility and suitable construction period of potential transmission lines. In addition, the operation integrates with graph theory and Boolean algebra to find the bottlenecks of regional power transmission grid and appear years from the simulation of systemic method. The assessment method which this study brings up can quickly produce planning project of regional power transmission grid and corresponding construction period. The research results can serve as the reference and application for regional power transmission grid planning and feasibility assessment in the future. Besides, it can uplift power supply reliability and quality and assure the operational efficiency.
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Chen, Rui-Chen, and 陳瑞成. "The Study of Power Line Transmission Control Based on LonWorks Technology." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/31084940408962695757.
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碩士南台科技大學
電機工程系
93
This thesis presents a power line control appliance system. The proposed system is realized by using LonWorks network and related hardware circuit. LonWorks technology is implemented through microcontrollers, called Neuron Chip. The objective of this research is to utilize the criterion of LonWorks technology to develop the intelligent home appliance automation system. In this home automation system, the main transmission medium is constructed with power line, which is the most essential communication in the home. Finally, a complete serial gateway and link with the power line control system has been achieved in this thesis by Visual basic.
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Chen, Yen-Wei, and 陳彥維. "Study on Magnetic Resonance Wireless Power Transmission System with Adjustable Frequency." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/58y9e7.
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碩士國立中央大學
電機工程學系
107
The purpose of this thesis is to design wireless power charging platform for diverse portable electronic products with different frequencies, so as to improving commercial wireless power chargers’ transmission efficiency. First, through measure the coils and analyze the equivalent circuit of magnetic resonance wireless power transmission system, the relationship between transmission efficiency and relevant parameters are derived. According to the required frequency, compensation capacitors are obtained by the principle of impedance matching. Then, use Advanced Design System (ADS) for simulations to ensure that the system performs at the required frequency. Finally, the system is implemented in experimental circuit to verify the overall system transmission efficiency can effectively uprate at same the resonant efficiency.
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Shi-HuaLee and 李世華. "Study on Guideway Type Contactless Power Transmission Track for Electric Vehicles." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/75315158492977851124.
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Chang, Chi-Wen, and 張几文. "A Study on Off-shore Wind Farm Power Transmission for GridInterconnection." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/a89fu2.
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碩士國立中山大學
電機工程學系研究所
95
The interest in the utilization of offshore wind power is increasing significantly. Due to the shortage of in-land locations for wind farm and the wind speed offshore is potentially higher than that of onshore, which leads to a much higher power production. In this thesis a large offshore wind farm is modeled using Matlab simulation package. In the simulations active stall regulated wind turbines driving fixed speed asynchronous generators are used. Two different types of interconnections are modeled and compared, one is the Voltage Source Converter (VSC) based HVDC link and the other one uses high voltage AC (HVAC) cable interconnection. Transmission faults are simulated in each system and the transient response are examined. Three phase fault and single line to ground fault are used to compare the performance of the VSC based HVDC interconnection system and HVAC interconnection. It is found that compared to the traditional HVAC transmission, the VSC based HVDC transmission would have better performance under various system disturbances.
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JUNG, MING-HUNG, and 鍾明宏. "On the Study of the Power-Hybridized Transmission Mechanism Design of Serial-Parallel Hybrid Power Motorcycles." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/34901465354524010585.
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碩士大葉大學
機械工程研究所
90
This thesis is to study the power-hybridized transmission mechanism of the hybrid power motorcycle. The subject is on the transmission efficiency of the five-member and six-member planetary gear train with two degrees of freedom. Then we find the best mechanism for the power-hybridized transmission mechanism. Allocate engine, motor and generator for every possible kind of allocation. At last, use the computer to simulate the power-hybridized transmission mechanisms together with the performances of engine, motor and generator, and the CVT''s theoretical model to get the dynamic characteristics of the hybrid power motorcycle. In the part of all possible allocations, we use the moment equilibrium relation, and the relation of the conservation of energy to allocate engine, motor, generator and driving axis for different kinds of allocations together with analyzing, and then obtain one kind of allocations which can be used as the power-hybridized transmission mechanism. In the part of simulating the hybrid power motorcycle, use the mathematical model of the power-hybridized transmission mechanism which we choose, together with the relationships between the torque and rotational speed of the engine, motor and generator, respectively. And then write down the computer program for simulation to get the dynamic characteristics of the hybrid power motorcycle.
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Huang, Ting-Yao, and 黃亭堯. "The Study on Transmission Line Transformer and Power-Combining Techniques for Fully Integrated Power Amplifier Design." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/52842927553299575085.
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碩士國立中央大學
電機工程研究所
99
The study of this thesis is to design different power combiners for power amplifier application, which can be used to achieve the high transmission efficiency and impedance transformation. The content of this thesis is divided into two parts. They are transformer and transmission line transformer (TLT) for power combining respectively. In the first part, we have designed two power amplifiers with power combining transformers. They are “A Parallel Power Combining Transformer for CMOS Power Amplifier” and “Differential Class E Power Amplifier Using Power Combining Transformer” respectively. The amplifiers were designed and implemented in tsmcTM 0.18 μm CMOS process for 2.4 GHz application. The first design is used of two class AB differential pairs, which were combined the output power from four groups of amplifiers by parallel power combining transformer. And the second design is used a class E differential pair, which were combined the output power from the two class E amplifiers by the power combining transformer. The second part of the thesis is related to the use of TLT for power combining in power amplifier design. A K-band class AB differential power amplifier with TLT was implemented in WINTM 0.15 μm pHEMT process. The measured results of these designs are summarized as follow. The CMOS power amplifier with parallel power combining transformer achieves a power gain of 19.8 dB, and input and output return losses are 10.2 dB and 5.3 dB respectively. The output 1-dB gain compression point (P1dB) is 20.9 dBm, and the saturated output III power is 26.7 dBm with the maximum power added efficiency of 24.8%. The chip size is 1.4 × 1.37 mm2. The differential class E power amplifier with power combining transformer achieves apower gain of 12.98 dB. The output 1-dB gain compression point (P1dB) is 23.3 dBm, and the saturated output power is 25.9 dBm, with the maximum power added efficiency of 29.9%. The chip size is 1.33 × 1.11 mm2. The K-band Power Amplifier with TLT power combining network achieves a power gain of 10.2 dB, and input and output return losses are 18.7 dB and 11.48 dB respectively. The output 1-dB gain compression point (P1dB) is 22 dBm with the power added efficiency of 23.4%. The chip size is 1.5 × 1 mm2.