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Dissertations / Theses on the topic 'Improvement of efficiency'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

McClay, Catherine I. "Efficiency improvement of cage induction motors." Thesis, University of Cambridge, 1996. https://www.repository.cam.ac.uk/handle/1810/272668.

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2

BURLON, FABIO. "Energy Efficiency Improvement in Professional Ovens." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2920073.

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Tackling the climate change by reducing energy consumption is among the biggest, most urgent challenges society is facing and requires a continuous efficiency improvement of thermal systems.With the aim of reducing energy consumption and improving energy efficiency of professional appliances, this thesis is the results of the investment Electrolux Professional Spa has made. The industrial research started with an analysis of the state of the art of the energy standards applied to a professional oven. It continues, identifying a new methodology for the energy efficiency evaluation of a combined

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3

Zhao, Bo. "Spectrum efficiency improvement techniques for wireless communications." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/36885/.

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Ultra-wideband (UWB) and cognitive radio have been proposed as two important approaches to improve the spectrum efficiency of wireless communications. The aim of this thesis is to study these two techniques considering different practical conditions. The study of the UWB technique begins with the analysis of the statistical properties of the sum of path gains using maximum ratio combining technique based on the IEEE UWB channel models. This analysis helps to justify the equivalent tapped-delay-line discrete UWB channel models. Following the study of the UWB channel models, signal-to-interferen

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4

Zong, Jie. "Conversion efficiency improvement in acousto-optical modulation." Diss., The University of Arizona, 1999. http://hdl.handle.net/10150/298755.

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A high conversion efficiency in acousto-optical (AO) modulation can be obtained through careful design of an acousto-optic modulator (AOM), as well as careful selection of the following: the AO crystal material, the orientation in the AO crystal with respect to direction of propagation of the acoustic wave, the piezoelectric transducer material, the orientation of the transducer material, and the AOM fabrication method. A class of AOM's has been introduced wherein the diffraction efficiency of the AOM is improved by augmenting the design of the AOM so as to produce two or more passes of the op

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Kribs, John David. "Malt Drying Model Verification for Efficiency Improvement." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5214.

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The aim of this work has been to minimize the thermal energy required to dry malt in deep beds while maintaining malt quality, and without increasing the drying time more than one hour. Malt drying usually takes place in deep bed (. 7-1 m) driers by forcing hot air through the bed. Measurements of inlet and outlet relative humidity, temperature, and airflow at a drier at Great Western Malting Company's Vancouver, Washington facility were made to find average moisture content versus time. The measurements were used to develop a wetted surface model of a malt bed. However, the model was not deta

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6

OMODEI, ZORINI FABIO. "IMPROVEMENT OF FEED EFFICIENCY IN DAIRY CATTLE." Doctoral thesis, Università degli Studi di Milano, 2021. http://hdl.handle.net/2434/859146.

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The improvement of feed efficiency in dairy cattle has traditionally been approached through an increase in production levels. However, the effectiveness of the energy partitioning underlying the dilution of maintenance phenomenon decreases with each successive increment in production relative to body size, and therefore will lose importance in the next years. The selection of more efficient animals (i.e. animals that consume less feed to achieve a fixed production) is limited by the cost and inherent difficulty in recording individual feed intake data, which prove pivotal to improve the accur

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Romaní, Picas Joaquim. "Improvement of building energy efficiency with radiant walls." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/461942.

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Els edificis suposen una part molt significant del consum energètic i de les emissions de CO2 a nivell global. Resoldre aquest problema requereix de la implementació de tecnologies d'eficiència energètica i de la integració d'energies renovables. En aquest context, els mur radiants són una tecnologia capaç d'afrontar aquests reptes. La avaluació del potencial d'aquest sistema s'ha dut a terme amb la experimentació d'una caseta amb murs radiant connectada a un sistema geotèrmic. Els resultats mostren la capacitat del sistema per reduir el consum energètic i desplaçar el pics de demanda, destaca

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8

Vaghani, Brijraj Beard Cory. "Improvement in spectral efficiency for wireless emergency communications." Diss., UMK access, 2004.

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Thesis (M.S.)--School of Computing and Engineering. University of Missouri--Kansas City, 2004.<br>"A thesis in electrical engineering." Typescript. Advisor: Cory Beard. Vita. Title from "catalog record" of the print edition Description based on contents viewed Feb. 28, 2006. Includes bibliographical references (leaves 55-58). Online version of the print edition.

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9

Mäkinen, L. (Liisa). "Improvement of resource efficiency in deinked pulp mill." Doctoral thesis, Oulun yliopisto, 2013. http://urn.fi/urn:isbn:9789526201337.

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Abstract Paper recycling is an ecological strategy for disposing of waste paper, but more importantly, recovered paper is an important source of raw material in the paper and board industry. Deinked pulp production from recovered paper has proved economically viable by comparison with virgin fibre pulp manufacturing, but this viability is now threatened by increasing waste disposal costs, as up to 25% of the raw material available for deinked pulp production can end up in the reject streams, which then have to be disposed of. The most common practice at present is incineration and disposal of

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10

Valizadeh, Sima. "Compression efficiency improvement for 2D and 3D video." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62086.

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The full abstract for this thesis is available in the body of the thesis, and will be available when the embargo expires.<br>Applied Science, Faculty of<br>Electrical and Computer Engineering, Department of<br>Graduate

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11

Douxchamps, Pierre-Alexis. "Diesel thermal management optimization for effective efficiency improvement." Doctoral thesis, Universite Libre de Bruxelles, 2010. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210123.

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This work focuses on the cooling of diesel engines. Facing heavy constraints such<p>as emissions control or fossil energy management, political leaders are forcing car<p>manufacturers to drastically reduce the fuel consumption of passenger vehicles. For<p>instance, in Europe, this fuel consumption has to reach 120 g CO2 km by 2012, namely 25 % reduction from today's level.<p>Such objectives can only be reached with an optimization of all engines components<p>from injection strategies to power steering. A classical energy balance of an internal<p>combustion engine shows four main losses: enthal

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12

Shi, Hongsen. "Building Energy Efficiency Improvement and Thermal Comfort Diagnosis." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555110595177379.

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13

Thennakoon, Mudiyanselage Sakura Dilhani Karunarathne. "Genetic improvement of nitrogen use efficiency in barley." Thesis, Thennakoon Mudiyanselage, Sakura Dilhani Karunarathne (2021) Genetic improvement of nitrogen use efficiency in barley. PhD thesis, Murdoch University, 2021. https://researchrepository.murdoch.edu.au/id/eprint/64211/.

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Grain yield is the key target in barley production. A powerful tool to increase yield has been the use of fertilizers of which nitrogen (N) is the main nutrient for the productivity and grain quality. Yet excessive application leads to environmental pollution and high production costs. Therefore, improvement of nitrogen use efficiency (NUE) is fundamental for sustainable agriculture. Only limited research has been conducted on barley NUE. A few QTLs controlling NUE have been identified, albeit they are not stable across experiments due to low marker density, limited genetic diversity and small

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14

Kim, Sanghong. "Statistical Modeling Method for Efficiency Improvement of Industrial Processes." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188626.

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15

Islas, Michael. "EFFICIENCY IMPROVEMENT TECHNIQUES FOR HIGH VOLTAGE CAPACITOR CHARGING METHODS." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2969.

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The goal of this thesis is to design and fabricate a DC-to-DC converter for use in high-voltage capacitor charging applications. The primary objectives include increasing the efficiency and reducing the cost of traditional methods used for this application. Traditional methods were not designed specifically for high-voltage capacitor charging and were thus very primitive and exhibited lower efficiency. Prior methods made use of a high voltage power supply and a current limiting resistor or control scheme. The power supply would often only operate efficiently at a single voltage value and would

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Lazaro, Ezra Lyimo. "Improvement of the dehulling efficiency of sorghum and millet." Thesis, University of Newcastle Upon Tyne, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299349.

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de, Leon Maria Theresa. "Efficiency improvement in MEMS thermoelectric generators employing solar concentration." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/368249/.

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Thermoelectric generators (TEGs) are devices that convert heat into electricity. The efficiency of thermoelectric generators depends on the temperature difference across the device, the average temperature of operation, and on the thermoelectric properties of the material. Most work on improving the TEG efficiency deals with improving the thermoelectric properties of the material. In this work, a method of improving the efficiency of the TEG by increasing the temperature difference is proposed. To accomplish this, a lens is used to concentrate solar radiation on the membrane of the TEG. By foc

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Ke, Jia. "Improvement of energy efficiency of pneumatic cylinder actuator systems." Thesis, University of Liverpool, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437508.

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19

Hong, Soon Hyeok Bercaw John E. Grubbs Robert H. "Improvement of olefin metathesis efficiency through understanding catalyst stability /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-04022007-122855.

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Young, Jacob. "Hydrogen injection into diesel engines for fuel efficiency improvement." Thesis, Young, Jacob (2008) Hydrogen injection into diesel engines for fuel efficiency improvement. Masters by Coursework thesis, Murdoch University, 2008. https://researchrepository.murdoch.edu.au/id/eprint/2079/.

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The purpose of this investigation was to determine whether hydrogen injected into a diesel internal combustion engine has the potential to reduce overall fuel consumption. The most economical means of performing the required tasks was used whenever possible in an attempt to mimic a small off-grid application. The genset was a small 4kW compression ignition diesel. The electrolyzer was an off-the-shelf model designed for automotive applications. It combines hydrogen and oxygen output and is currently found from many manufacturers over the internet. It was found that the H2/02 mixture actually d

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Brandt, Riley Eric. "Elucidating efficiency losses in cuprous oxide (Cu₂O) photovoltaics and identifying strategies for efficiency improvement." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81593.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 95-99).<br>In this thesis, I fabricated and characterized a series of thin-film cuprous oxide (Cu₂O) photovoltaic devices. I constructed several different device designs, using sputtered and electrochemically deposited Cu₂O. Characterization was done using XRD, SEM, optical spectroscopy, quantum efficiency, current-voltage, and capacitance-voltage measurements. Then, these devices were modeled using SCAPS-1D, a numerica

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Charupa, Thanarit. "Highway efficiency improvement : Thailand´s route no 4 - Case study." Thesis, KTH, Transportvetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-34610.

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Abstract The economic growth in Thailand has spread from the metropolitan area to other region of the country. This has led to the development of regional highway to serve as the connection link between the main port city, Bangkok and other part of the country. However, the project did not foresee the population growth situated along the highway. New dwellings on roadside are common throughout the highway. This increase demand for accessibility to the highway results in disruption of the main traffic flow by the local traffic. Thus these communities have contributed to the traffic problem on t

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Rorer, James L., and Luis F. Asifuinagomez. "Consolidated automated support system (CASS) efficiency and allocation cost improvement." Thesis, Monterey, California: Naval Postgraduate School, 2013. http://hdl.handle.net/10945/39003.

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Approved for public release; distribution is unlimited.<br>In this research project, we provide a method in which we incorporated a nonlinear model to allocate consolidated automated support system (CASS) stations utilizing real demand. In reviewing available literature, we frame the allocation of CASS stations as a problem of discrete capacity allocation with stochastic demand, and note that similar problems exist in the allocation of other types of service capacity (e.g., hospital beds). We employed a nonlinear model to present a better method for allocation. Currently, NAVAIR PMA 260 uses a

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Chan, Lap-chung, and 陳立中. "Productivity and efficiency improvement programmes of the Hong Kong Government." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31266976.

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25

Balwani, Siddharth (Siddharth Vashdev). "Operational efficiency through resource planning optimization and work process improvement." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78490.

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Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; and, (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; in conjunction with the Leaders for Global Operations Program at MIT, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 84-85).<br>This thesis covers work done at National Grid to improve resource planning and the execution of pipeline construction and maintenance work carried out at the yards. Resource Planning, the art of picking the right jobs for the right days and assigning the right cr

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Hsu, Jarrow, and 徐至謙. "The Efficiency Improvement of EP." Thesis, 1999. http://ndltd.ncl.edu.tw/handle/92752603735004221810.

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碩士<br>國立成功大學<br>機械工程學系<br>87<br>Electrostatic Precipitation（EP,or ESP）is a very effective way in removing the particulate from air streams. Thus, the EP technique has become a very popular gas cleaning method for many industrial plants which burn coals and other fossil fuels. The performance of any EP unit will gradually decline as its service time prolong, therefore, the thoroughly clean-up on electrodes is essential during the plants’ maintenance interval. However, if the decline rate becomes too fast, the plant may have to reduce its load or completely stop its operation in order

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Wang, Sheng-You, and 王聖佑. "Efficiency improvement on Quality Inspection." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/9bac65.

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碩士<br>國立勤益科技大學<br>資訊管理系<br>105<br>At present Taiwan's traditional manufacturing industries, most of the manufacturers use the ISO standard to improve the quality and efficiency of the productions. The primary activities to make the process function effectively are quality standardization of in-process inspection, including first and last check, independent inspection, inspection examination, etc.,. But they will build very large numbers of report files during operations that make the jobs very tedious and inconvenient. This study uses feasibility-analysis to illustrate the executable condition

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Fang, Ti, and 方翟. "Improvement strategy of artificial cellulosomes’ efficiency." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/83723786440296837416.

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碩士<br>國立中興大學<br>生命科學系所<br>105<br>The possibility of exhaustion of fossil fuels has drawn global attention to the issue of exploring renewable alternatives to fossil fuel. Lately, various renewable energy sources have been offered as alternatives to petroleum, such as bioethanol. It is a biofuel produced from grasses, wood, algae, or other plants. Lignocellulosic biomass is the non-edible portion of the plant, which is underutilized, but could be used for biofuel production. The structure complexity of lignocellulose makes it recalcitrant to be hydrolysised. How to enhance the efficiency of cel

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Tsai, Bo-Shiang, and 蔡柏祥. "Healthcare Resources Efficiency Evaluation and Improvement." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/49791853371833422193.

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碩士<br>東海大學<br>工業工程與經營資訊學系<br>99<br>The demand of emergency treatment is increasing gradually as the footsteps nowadays growing rapidly. Thus, how to use emergency resource wisely has become the important issue among emergency department. In this study, we apply system simulation to build an emergency simulation model, to investigate the actual resource distribution recently. Then, learn the output from different resources reallocation model, analysis the efficiency of different model by Data Envelopment Analysis, compare this result with the actual situation. An efficiency model can make use a

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HSU, KE-CHIEH, and 許可杰. "Efficiency Improvement of High Power Inverter." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/49497018341513182543.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>90<br>This thesis is concerned with efficiency improvement of high power inverter. A digital scalar pulse-width-modulation algorithm is proposed to reduce switching frequency of power transistors operated at peak load current. In addition, a novel shunt-type three-phase power inverter, which contains two power-transistor pairs in each phase, is presented so that each transistor pair shares only one-half of the switching loss. This will largely reduce the operating temperature of the power transistors and thereby increase the inverter capacity to twice as large as tha

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Ma, Ching-Cheng, and 馬競成. "DC Brushless Fan Efficiency Improvement Method." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/5cq3mu.

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碩士<br>國立高雄科技大學<br>電機工程系<br>107<br>Automatic equipment is growth in demand due to the rapid development of technology and entering the era of Industry 4.0. Consequently, fan becomes a vital part as the requirement of systemic cooling apparatus is getting increased. According to the type of power supply voltage, fans are classified to alternating current (AC) and direct current (DC). Although the structure of AC fan is simpler than DC fan, its efficiency is poor and speed tends to be interfered with the frequency of power supply. DC fans are divided into two categories: brushed and brushless. Th

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Wu, Ming-Sian, and 吳明憲. "Improvement of HEV regenerative braking efficiency." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/dzm5sv.

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碩士<br>國立臺北科技大學<br>車輛工程系<br>106<br>In hybrid vehicles, the regenerative braking system improved the efficiency of energy utilization by recovering the braking energy due to the wasted power of frequent braking when the vehicle was driving in the urban area. In addition to enhancing the efficiency of regenerative braking energy and energy recovery, the safety of the vehicle must be taken into consideration. In this study, Hybrid Vehicle (HEV) model was built for Toyota Hybrid Systems, and Autonomies software was used to collect real vehicle data and parameters. The brake controller was set into

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Liao, Chih-lun, and 廖志倫. "Efficiency Improvement for Collaborative Filtering Recommender System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/927hk5.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>104<br>In collaborative ﬁltering based recommender systems, products are regarded as features and users are required to provide rating scores to the products they have purchased. By learning from the rating scores, such a recommender system can recommend interesting products to the users. However, there are usually quite a lot of products involved and it would be very inefﬁcient if every product needs to be considered before making any recommendations. We propose a novel approach which applies a self-constructing clustering algorithm to reduce the dimensionality re

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Chen, You-Ruei, and 陳宥瑞. "Gas water heater Efficiency Improvement and Design." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/08003735722868003472.

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碩士<br>朝陽科技大學<br>精密機械暨水下機電技術整合產業碩士專班<br>104<br>Abstract In today's gas water heaters have become general household essential goods. Gas water heater as the name implies, is a combustible gas and air are mixed in the way, after entering the burner gas mixing in the combustion chamber for combustion heaters, heat conversion achieved. In the case of today's emphasis on economic, security and environmental protection, in order to achieve better performance, lower cost, safety and reduce pollution, the development trend of today. This study will focus on a particular core heating gas water heater, b

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Lyu, Sin-Yi, and 呂信毅. "Improvement of Separation Efficiency in Multiple Hydrocyclones." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/68537099639641552824.

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碩士<br>淡江大學<br>化學工程與材料工程學系碩士班<br>94<br>Effects of operating conditions on the particle separation efficiency of multiple hydrocyclones are studied and discussed. Two 10 mm-diameter hydrocyclones installed in series are used in experiments and in computational fluid dynamics (CFD) analyses. Experimental results show that an increase in pressure drop or split ratio, whatever in the first or the second hydrocyclone, leads the partial separation efficiency to be increase and the concentration of the final overflow to be decrease. The optimum operating condition for the separation of corn starch sus

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Chang, Yung-Chi, and 張詠冀. "Efficiency Improvement of Active Clamp Forward Converter." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/74700965120745504184.

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碩士<br>國立勤益科技大學<br>電子工程系<br>102<br>As the power transfer becomes more and more widely applied, the customers’ demands for the power efficiency, size and reliability becomes higher accordingly; however, the conventional forward diode rectifying converter can hardly meet the demands. 　　This paper adopts the active clamp structure to combine with auxiliary switches and clamper capacitance, which can effectively restrain the voltage transient and minimize the damages caused by switch changeover, as well as improve the converting efficiency. The capacity elements can operate a wider range of input v

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Pan, Chien-Nan, and 潘建男. "Contactless Magnetic Resonance Power Transfer Efficiency Improvement." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/93383237803068993843.

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碩士<br>國立臺灣海洋大學<br>電機工程學系<br>104<br>In this thesis, magnetic resonance serves as the technology for power transmission. The principle of magnetic induction is mostly adopted though there are wide applications of non-contact power supply on the market. In this study, the highly efficient Class E power amplifier together with stranded Litz wire is used as the coil of a resonator at the primary side. The spiral coil design forms a magnetic field featuring even distribution. Then, LTspice is used to simulate signal circuit of 6.78MHz oscillation frequency, circuit of the power amplifier and resonan

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Chien, Taichen, and 簡台珍. "Renewable energy and improvement of macroeconomic efficiency." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/29753814911100058678.

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博士<br>國立交通大學<br>經營管理研究所<br>95<br>This article analyzes the effects of renewable energy on the technical efficiency of forty-five economies during the 2001-2002 period through data envelopment analysis (DEA). In our DEA model, labor, capital stock, and energy consumption are the three inputs and real GDP is the single output. Increasing the use of renewable energy improves an economy’s technical efficiency. Conversely, increasing the input of traditional energy decreases technical efficiency. Compared to non-OECD economies, OECD economies have higher technical efficiency and a higher share

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Huang, Ko-Hsien, and 黃科憲. "Efficiency Improvement of Permanent-Magnet Synchronous Motors." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/89769347439238327930.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>90<br>This thesis is concerned with efficiency improvement of permanent-magnet synchronous motors. The optimal armature current vector is proposed to reduce copper and iron losses. In order to decrease q-d axis current ripple, a compensator is designed to correct controller parameters. Furthermore, a minimal input power tracing technique, which is insensitive to motor parameters, is proposed to increase the stability of the system. A digital control system for 150kW ac permanent-magnet synchronous motor is realized with digital signal processor (DSP TMS320

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Hsu, Kuo-Feng, and 徐國峯. "Efficiency Improvement of Three-phase Induction Motors." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/czdh3e.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>106<br>In response to the upgrade of global energy efficiency standards, the efficiency of low-voltage three-phase squirrel-cage induction motor is mandatorily upgraded to class IE3. Therefore, this thesis proposes to reduce the iron and rotor copper losses by using low-loss silicon steel sheet material and copper-bar rotor to replace silicon steel sheets and cast-aluminum rotor, respectively. Two 6-pole, 250HP, three-phase induction motors are designed and built, and the experimental as well as its counterpart groups are formed for benefit improvement analysis. The

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SHEN, YIN-CHI, and 沈胤錡. "Improvement of Temperature Control Efficiency of Handler." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/ue8zgr.

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碩士<br>國立高雄科技大學<br>電子工程系<br>107<br>In the age of advancement of science and technology, there are lots of high-technology products around us. The next generation communication technology-5G, which has a slogan that everything can be connected. The most important part in these technology products is IC. When the Wafer be produced from fab, that would be transferred to packaging and testing plant, cutting the wafer, packing the products, and then execute the electronic testing. While in the electronic testing, the requirement of temperature is different depends on various kind of IC, if the IC co

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Gunde, Kiran. "Spectral Efficiency Improvement in Spatial Modulation Systems." Thesis, 2019. https://etd.iisc.ac.in/handle/2005/4724.

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A novel energy efficient Multiple-Input-Multiple-Output (MIMO) technique is called Spatial Mod- ulation (SM). It uses only one radio frequency (RF) chain that reduces the hardware complexity and cost of the system. The concept of SM is to transmit the data information using modulation constellation and spatial constellation. It increases the spectral efficiency by keeping only one an- tenna active per every symbol period. Spatial Multiplexing (SMX) uses equal number of RF chains with transmit antennas that increases the hardware complexity and cost of the system. SM is free from Inter Ch

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黃嘉斌. "AMHS Transport Efficiency Improvement in TFT-LCD FAB." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/gqwcv2.

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Chen, I.-EN, and 陳怡恩. "The Determinants of Positive Abnormal Return : Efficiency improvement?" Thesis, 2017. http://ndltd.ncl.edu.tw/handle/jtqy2n.

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碩士<br>國立中正大學<br>財務金融系研究所<br>105<br>This paper use stochastic frontier analysis (SFA) to estimate the cost efficiency as the determinant of synergy to investigate the relationship between the efficiency and valuation effect of M&A. We analysis all M&A activities in America from 1980 to 2015. We find that the acquirers gain the higher stock reaction from their better prior year efficiency in M&A activities. Moreover, the shape of acquirer efficiency and change of Tobin’s Q is an inverted u-curve pattern. The post-merge value improvement in America is being led by the acquirer with appropriate ef

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Lee, Wei-Ting, and 李瑋婷. "Hydraulic Efficiency Improvement of Deep Water Constructed Wetlands." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/88953079401517230143.

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碩士<br>國立臺灣大學<br>生物環境系統工程學研究所<br>102<br>Recently, the constructed wetland (CW) has been included one of the units in the wastewater treatment system. In this thesis, the further research for this CW unit was conducted. The water depth of free water surface CW is bounded by performance of hydraulic efficiency. The design of the CW is thus ranging from 0.15 to 0.8 meter in practice. However, it would decrease the capacity of flooding detention volume due to the restriction of serious land use and limited area. Increasing the depth of CW is one of the most effective ways to increase not only the q

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Tzeng, San-uen, and 曾聖淵. "Security and Efficiency Improvement for Web Captcha Scheme." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/05396535149051498116.

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碩士<br>東吳大學<br>資訊管理學系<br>100<br>Web CAPTCHA was first used to distinguish the user is human or robot by DEC Systems Research Center in 1997. Today's Web CAPTCHA is vulnerable to OCR, and its excessive distortions make difficult to identify; Frequent web connection of server-side Web CPATCHA generating causes congestion. From the literature, we found that One-Time Password technique make clients create their own passwords and decrease network congestion. But, One-Time Password authentication cannot be used directly in the Web CAPTCHA structure. Thus, we change the One-Time Password scheme: S/Key

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Wu, Jhen-Wei, and 吳震緯. "Efficiency improvement of polymer solar cells by nanoimprinting." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/94463246158538145280.

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碩士<br>國立成功大學<br>電機工程學系碩博士班<br>97<br>The main research in this paper discusses the effect caused by nanoimprinting for organic solar cells. We use two types of mixed polymer materials, P3HT and PCBM, as active layer of solar cells and produce the basic structure (Glass / ITO / PEDOT: PSS/P3HT & PCBM / Al). By adjusting the thickness of active layer, temperature and time of post-annealing, the device with better performance can be achieved. The technology of nanoimprinting is applied here. We use silicon substrate, which surface has been etched, as the stamp and apply nanoimprinting on the a

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KUO, CHUN-CHENG, and 郭竣誠. "The Study of Efficiency Improvement for Photovoltaic Module." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/53068519854044025266.

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碩士<br>正修科技大學<br>電機工程研究所<br>102<br>In recent years,because solar power system,has the advantage of low environmental pollution,is currently recognized as the national development of renewable energy is the most important one. However, limited by the properties of semiconductor materials .Makes solar power generation efficiency is limited. Many studies, To effectively improve the efficiency of solar photovoltaic panels to generate electricity, Have to raise the majority of its solar energy, And to reduce the temperature of the main module, The stronger the solar energy concentrator module higher

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Liu, Fong-Jey, and 劉豐傑. "Inverter Efficiency Improvement Using Mixed Silicon Carbide IGBT." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/68387715101136581362.

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碩士<br>輔仁大學<br>電機工程學系碩士在職專班<br>104<br>In the applications of power electronic systems, the role of the application to whole system in Freewheeling diodes (FWD) is becoming more important recently. Traditional technology on pure Silicon FWD development had reached the mature stage. Silicon carbide is a new kind of material used in semiconductor. It has many features such as higher working frequency, lower switching losses and higher working temperature comparing with the Silicon device. These features bring new development opportunities in high power systems. This paper has compared and analyzed

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Lin, Chin-Wei, and 林晉葳. "Efficiency Improvement of Multi-Output Flyback Power Converters." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/84902846718786872092.

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碩士<br>國立高雄應用科技大學<br>電機工程系<br>97<br>This thesis describes the fundamental structure of flyback power converter which has the specifications of input voltage 90V-264V, operation frequency 47Hz-63Hz, output voltages +5V, +12V, -12V, and 40W power. With the cost consideration, the Tachuchi experiment method is used to analyze the transformer, which is the element causing the major loss in the converter. Based on the analysis result, a set of parameters is found to reduce the loss of transformer for improving the efficiency of the converter.

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