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Dissertations / Theses on the topic 'Study variable'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Acuna, Stamp Annabelen. "Design Study for Variable Data Printing." University of Cincinnati / OhioLINK, 2000. http://rave.ohiolink.edu/etdc/view?acc_num=ucin962378632.

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2

Sakai, Tadashi. "A Study of Variable Thrust, Variable Specific Impulse Trajectories for Solar System Exploration." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4904.

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A study has been performed to determine the advantages and disadvantages of variable thrust and variable specific impulse (Isp) trajectories for solar system exploration. There have been several numerical research efforts for variable thrust, variable Isp, power-limited trajectory optimization problems. All of these results conclude that variable thrust, variable Isp (variable specific impulse, or VSI) engines are superior to constant thrust, constant Isp (constant specific impulse, or CSI) engines. However, most of these research efforts assume a mission from Earth to Mars, and some of them

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3

Eckersley, Michael D. "Explicit heuristic training as a variable in design problem-solving." Virtual Press, 1985. http://liblink.bsu.edu/uhtbin/catkey/438704.

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Purpose of the Investigation. The purpose of this investigation was to determine whether a treatment of design-related heuristics would affect the judged value of student design products. Procedures. Subjects consisted of 38 foundation-level design students at Ball State University, Muncie, Indiana. Following five weeks of basic design instruction, a pretest, constructed to measure design problem-solving performance in relation to two problem-types (a Baseline Problem and a Conceptual Problem), was issued to two groups. Thereafter, a treatment of design-related heuristics was administered to o

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4

Smith, Deneal Anthony. "An observational study of cataclysmic variable stars." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624581.

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5

Araujo-Betancor, SofiÌa. "An observational study of cataclysmic variable evolution." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403848.

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6

Khorshid, Sepideh. "Numerical and Experimental Study of Flows with Variable Density." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39209.

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The knowledge of density current behaviours as a result of two or more fluids of different densities interacting is of particular importance in many practical applications. Within the field of hydraulic engineering, examples include buoyant effluent discharges from desalination plants, advancements of saline water under freshwater in estuaries, and flows occurring when a gate is removed at the outflow/inflow of a river. The main goal of this study is to improve the understanding of the mixing patterns of density currents as well as their related numerical simulation. In this study, first, an a

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7

Gabanyi, Krisztina Eva. "High resolution study of selected intraday variable sources." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=980922437.

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8

Poole, Tracey Suzanne. "A multi-wavelength study of cataclysmic variable stars." Thesis, University College London (University of London), 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.415225.

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9

Haskins, Michael Sean. "A hypercard stack on exploring single variable equations." CSUSB ScholarWorks, 1996. https://scholarworks.lib.csusb.edu/etd-project/1194.

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10

Rappini, Andrea. "A study on set variable representations in constraint programming." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2011. http://amslaurea.unibo.it/1955/.

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Il lavoro presentato in questa tesi si colloca nel contesto della programmazione con vincoli, un paradigma per modellare e risolvere problemi di ricerca combinatoria che richiedono di trovare soluzioni in presenza di vincoli. Una vasta parte di questi problemi trova naturale formulazione attraverso il linguaggio delle variabili insiemistiche. Dal momento che il dominio di tali variabili può essere esponenziale nel numero di elementi, una rappresentazione esplicita è spesso non praticabile. Recenti studi si sono quindi focalizzati nel trovare modi efficienti per rappresentare tali variabili.

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11

Ling, Jinghong. "A study of variable speed 3-in Knelson concentrator." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0023/NQ50209.pdf.

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12

Ropp, David L. "Numerical study of shallow water models with variable topography." Diss., The University of Arizona, 2000. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_2000_165_sip1_w.pdf&type=application/pdf.

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13

Roy-Aikins, J. E. A. "A study of variable geometry in advanced gas turbines." Thesis, Cranfield University, 1988. http://hdl.handle.net/1826/3907.

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The loss of performance of a gas turbine engine at off-design is primarily due to the rapid drop of the major cycle performance parameters with decrease in power and this may be aggravated by poor component performance. More and more stringent requirements are being put on the performance demanded from gas turbines and if future engines are to exhibit performances superior to those of present day: engines, then a means must be found of controlling engine cycle such that the lapse rate of the major cycle parameters with power is reduced. In certain applications, it may be desirable to vary engi

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14

MacKinnon, A. V. "An experimental study of a variable camber wing (VCW)." Thesis, Cranfield University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359503.

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15

Taylor, Anna B. "A Study of Variable Selection Methods in Supersaturated Models." Bowling Green State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1586963467541177.

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16

MATTUCCI, LUCA MARIA. "Numerical study of cold rolling process with variable thickness." Doctoral thesis, Università Politecnica delle Marche, 2018. http://hdl.handle.net/11566/256367.

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Il principale obiettivo tecnologico di questo progetto di ricerca è lo sviluppo di una tecnologia di laminazione a freddo innovativa, tramite la distribuzione di aree di diverso spessore sul prodotto finito, in modo che il materiale possa essere distribuito al meglio dove è necessario, per soddisfare i requisiti di resistenza e/o rigidezza. Per quanto riguarda il processo di laminazione a freddo, l'obiettivo è quello di effettuare un upgrade della soluzione 1D, nota anche come profile- rolling, già presente in molte aree industriali: il processo di laminazione a zone denominato patch-rolling.

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17

Chen, Junxiang. "Study of 270VDC system application." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/9477.

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As increasing power requirement in more or all electric aircraft, electric power system is required to be more efficient and lower in weight. Among the current power generation technologies, 115V variable frequency (VF) system and 270VDC system are regarded as the two optimal options for future use in MEA or AEA. Therefore, it is very important to compare their relative merits in order to determine the optimal choice on the primary power type. As the reviewed literature mainly represents the comparison between 270VDC system and 115V constant frequency system, it is very necessary to conduct th

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18

McIntyre, Zachary Scott. "An Analysis of Variable Misconceptions before and after Various Collegiate Level Mathematics Courses." Fogler Library, University of Maine, 2007. http://www.library.umaine.edu/theses/pdf/McIntyreZS2007.pdf.

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19

SINGH, KEVIN. "Comparing Variable Selection Algorithms On Logistic Regression – A Simulation." Thesis, Uppsala universitet, Statistiska institutionen, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446090.

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When we try to understand why some schools perform worse than others, if Covid-19 has struck harder on some demographics or whether income correlates with increased happiness, we may turn to regression to better understand how these variables are correlated. To capture the true relationship between variables we may use variable selection methods in order to ensure that the variables which have an actual effect have been included in the model. Choosing the right model for variable selection is vital. Without it there is a risk of including variables which have little to do with the dependent va

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20

Zerhouni, Badia. "Reading in L1, L2, and FL, a variable-treatment study." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/nq21022.pdf.

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21

Ling, Jinghong 1948. "A study of a variable speed 3-in Knelson concentrator /." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35468.

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The distribution of fluidization flow of a variable speed 3-in (7.5 cm) Knelson centrifugal concentrator was first studied. Its performance was then investigated for different types of synthetic ores, and the effect of rotation speed, fluidizing water, gangue density and size distribution, and feed rate determined. To obtain some fundamental information relative to the recovery mechanisms of the Knelson Concentrator, the percolation or migration of dense particles in a gangue bed was investigated in the gravitational field, using a fluidization column. The equations for determining the instant

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22

Shiferaw, Mamo Abel. "Regression with a Partially Censored Dependent Variable Under Simualtion Study." Thesis, Örebro universitet, Handelshögskolan vid Örebro Universitet, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-37532.

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23

Benidir, Mohamed. "A study of variable speed drives for the mining industry." Thesis, University of Nottingham, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254427.

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24

Rushton, M. T. "A multi-wavelength study of the peculiar variable V838 monocerotis." Thesis, Keele University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.431376.

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25

Eddy, Grant Lee. "Study of Steady-State Wake Characteristics of Variable Angle Wedges." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/35205.

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Current methods of creating inlet total pressure distortion for testing in gas turbine engines are only able to simulate steady-state distortion patterns. With modern military aircraft it is becoming necessary to examine the effects of transient inlet distortion on engines. One alternative being evaluated is a splitting airfoil that is essentially a wedge that can be set at different opening angles. An array of such devices would be placed in front of the engine for testing that would be capable of creating steady-state distortion patterns as well as transient distortion patterns by changin

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26

Padmanabhan, Babu. "A study of isostatic framework with application to manipulator design." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/29317.

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Isostatic frameworks are statically determinate trusses that are self contained (Le. they exist independent of support or foundation). Isostatic frameworks have been widely used as supporting structures, and recently they have been used as the structure for parallel manipulators. These truss-based manipulators could potentially solve the problems facing conventional manipulators and could make the design of high-degree-of-freedom manipulators feasible. The rigorous scientific study of isostatic frameworks and manipulators based on their structure has been limited. Recent developments in the de

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27

Mei, Chuan Bin 1972. "Study of unsteady viscous flows generated by harmonically variable inflow velocities." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=83876.

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The unsteady flows generated by the harmonically variable inflow velocities are studied in this thesis by using a numerical method for the time-accurate solution of the Navier-Stokes equations. This method, which has been developed by Mateescu and Venditti, uses an implicit three-point-backward scheme for the real time discretization, and a pseudo-time discretization based on a relaxation procedure using artificial compressibility. A special decoupling procedure is used to eliminate the pressure from the momentum equations with the aid of the continuity equation in pseudo-time, in order

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28

Bortot, Baptiste. "Gas for Balancing of Variable Power Generation : A Systemic Case Study." Thesis, KTH, Elektriska energisystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-144860.

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With the increasing share of variable renewable generation, balancing electric powersystems could become a major concern for system operators because of their variableand hardly predictable nature. However, gas technologies appear as a solutionto provide this flexibility, but the impacts on the gas power system have hardly beeninvestigated. In this thesis, consulting reports on the subject matter, regulator suggestions andgas-electricity interaction models in scientific literature are studied and four sourcesare identified to be used for balancing: linepack, storage facilities, liquefied natur

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29

Baker, Graham. "A numerical parametric study of nonlinear behaviour in variable depth beams." Thesis, Heriot-Watt University, 1987. http://hdl.handle.net/10399/1021.

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30

Cheng, Xiaoming. "A numerical study of planing hydrodynamics using strips of variable pressure." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359286.

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31

Vanslette, Kevin M. "Theoretical Study of Variable Measurement Uncertainty h_I and Infinite Unobservable Entropy." Digital WPI, 2013. https://digitalcommons.wpi.edu/etd-theses/289.

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This paper examines the statistical mechanical and thermodynamical consequences of variable phase-space volume element $h_I=?igtriangleup x_i?igtriangleup p_i$. Varying $h_I$ leads to variations in the amount of measured entropy of a system but the maximum entropy remains constant due to the uncertainty principle. By taking $h_u ightarrow 0^+$ an infinite unobservable entropy is attained leading to an infinite unobservable energy per particle and an unobservable chemical equilibrium between all particles. The amount of heat fluxing though measurement apparatus is formulated as a function of $

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32

Wu, Yunxiang. "A power loss study of small-to-medium variable speed drives." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.611481.

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33

tayu, Hsu, and 徐達裕. "Study of Variable-Voltage Variable-Frequency Inverter Utilizing Piezoelectric Transformer." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/56400880160692196119.

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碩士<br>國立成功大學<br>電機工程學系<br>88<br>In this thesis, piezoelectric transformers (PTs) are applied as frequency modulated device. The instant voltage of the reference input is designed to drive and control the frequency of PT, and the corresponding voltage gain of PT is decided by variable interval of the vibrational frequency. The amplitude of PT’s vibration will be equal to the expected instant output voltage of the VVVF (Variable frequency variable voltage) inverter. In an experiment we hope to use the digital synthesizer to produce a fundamental output, and the fundamental frequency will be equa

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34

Yan, Gou-Zhi, and 顏國智. "The Study of Variable-Speed." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/59180055815556581009.

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碩士<br>國立成功大學<br>機械工程學系<br>89<br>When the power input of a linkage-mechanism is a rotary motor, it is generally assumed that this motor rotates at a constant speed. The desired output motions can be obtained by selecting topological structures and synthesizing dimensions of the linkage mechanism. But if the required output motion changes, dimensions of the links or even the topology of the mechanism have to be redesigned. Therefore, we can vary the input speed of the servomotor to generate the desired output motion of the linkage mechanism. However, it is necessary to take the dynami

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35

Weng, Chien-Hsun, and 翁建勳. "A Simulation Study Of Variable Contracts." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/45nw7r.

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36

Pin, Cheng Chun, and 程俊賓. "A Study on the Comparison of Some Variable Control Charts with Variable Sample Sizes." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/36157137808806820287.

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碩士<br>輔仁大學<br>數學系研究所<br>91<br>Abstract In 2000, R. Sivasamy et al. proposed a control chart called MDS control chart. In their paper, they emphasized only the detecting ability but say nothing about the possible false alarm problem of such control chart. In this research, we study such problem why comparing the relative false alarm rate of three control chart, namely VSS 、VSS and MDS variable control chart with variable sample sizes.

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37

鍾金龍. "The Study on Centrifugal Chiller Use Variable." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/72993855571894898287.

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碩士<br>國立臺北科技大學<br>冷凍與低溫科技研究所<br>90<br>Abstract This study discusses both theoretical and practical differences between centrifugal chiller unit with fixed speed (FS) guide vane capacity control, and variable frequency drive (VFD). The centrifugal chiller unit selection program is based on McQuay rating program. Both FS and VFD units ranged from 702kw to 3510kw are selected for this study based on three conditions which respectively are (1).using ARI Standard : leaving chilled water temperature 6.7℃、entering condenser water temperature 39.4℃ and following the change of ARI condenser

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38

Yi-Ling, Lee, and 李貽玲. "Study on the variable seletion with LISREL." Thesis, 1993. http://ndltd.ncl.edu.tw/handle/43733335419169559029.

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39

Chen, Yi Tsung, and 陳易聰. "Study on regulation of variable life insurance." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/23430749787267255973.

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40

HUANG, SHIH-HUNG, and 黃士泓. "Study of a Variable Caster Suspension System." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/6rgct3.

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碩士<br>國立臺北科技大學<br>車輛工程系<br>106<br>The purpose of this study is to investigate the influence of different suspension geometry on the vehicle steering behavior. The analysis result is used to design a new variable geometry suspension system capable of reducing the steering torque. First of all, ADAMS/Car was used to construct different models of geometry suspension vehicles, and to compare the demand of power with different setting of caster in low speed, so that the control strategy could be designed. In addition, this study used suspension derivative method to analyze the mechanical trail form

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Li, I.-Chih, and 李益誌. "A Study on Hybrid Variable Speed Systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/rm8g7w.

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碩士<br>國立虎尾科技大學<br>機械與機電工程研究所<br>96<br>This work aims to propose an novel method of the hybrid variable speed systems (HVSS), such that it has the advantages of higher reliability, easier adjustibility, lower cost, easier control, faster response, lower input power, higher power transmission, and with flywheel effect. First, the design requirements and design constraints are summarized by investigating the characteristics of HVSS structures. Then, the atlas of feasible structure is systematically generated by performing structural synthesis using graph theory. After that, the kinematic design m

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42

Li, Jia-Ming, and 李佳銘. "Study of the Fluorescent Lamp Dimming Technology Based on Variable Frequency and Variable!Voltage Circuit." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/10664691886528458679.

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43

Etele, Jason. "Computational study of variable area ejector rocket flowfields." 2004. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=80239&T=F.

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44

Chou, Chia-Cheng, and 周家正. "Study On A Variable Frame Pitch Detection Algorithm." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/ah9mce.

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碩士<br>中原大學<br>電機工程研究所<br>93<br>ABSTRACT The objective of this thesis is to study the pitch detection methods of speech signals. Pitch is a very important feature in voiced speech and it is widely used in speech applications. Most of the pitch detection methods are based on fixed-length frames. In 1996, Xiaohu Qian and Ramdas Kumaresan proposed a detection method which was based on variable-length frames. According to the author’s research, the proposed method can overcome some weaknesses of other methods based on fixed-length frames, and can get more accurate results. In this thesis, we study

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45

Hsu, Meng-Hui, and 徐孟輝. "A Study on Variable Speed Disk-Cam Systems." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/68539219863406858020.

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博士<br>國立成功大學<br>機械工程研究所<br>84<br>In designing a cam-follower system, the cam is often assumed to be operated at a constant speed. The traditional approach for improving the motion characteristics is to design a new displacement curve which has better motion characteristics. This work, from the kinematic point of view, presents a novel approach finding an appropriate cam-input speed function of a given cam- follower system to improve the characteristics of follower-motion and cam-torque. Ac

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Lin, Tsong Ming, and 林聰明. "Study of Output Feedback Integral Variable Structure System." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/28948921173657762779.

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碩士<br>國立臺灣師範大學<br>工業教育學系<br>84<br>The purpose of this thesis is to study the design method of output feedback integral variable structure system. Integral variable stucture system has feature of no steady state error. It suppresses the variation of parameters and external disturbance by means of designing a boundary layer, adopts a complicated control law which is not easy to operate. This thesis adopts output feedback method, takes the difference between system output and integrator output

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Wu, Yong-Yuan, and 吳永遠. "The study on variable control for sunshade light." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/79904391314082843240.

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碩士<br>國立中興大學<br>生物產業機電工程學系<br>93<br>The inner or outer shading nets are widely adopted to control the intake solar energy into facilities in Taiwan at present. In order to improve the photosynthetic environment in cultivating plants, this study uses the shading strip to simulate the blind to control the intake sun light. The image technology is utilized for the analysis of shading effect under different setups. The variation of shading effect and uniformity of light distribution inside the facilities are analyzed. The experimental results showed that the shading strips placed in the north-sout

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48

Liu, Yu-da, and 劉育達. "A Study of Double-Variable-Curvature Fiber Microlens." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/76539525887904756975.

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博士<br>國立中山大學<br>光電工程學系研究所<br>99<br>A study of double-variable-curvature microlenses (DVCM) for promoting coupling efficiency between the high-power 980-nm laser diodes and the single-mode fibers has been proposed. The purpose of the fiber microlens fabrication was to make the mode field match between the laser beam and the fiber as the beam propagating through the fiber microlens. To make the mode match, the shapes of the fiber microlens demanded nothing else but the offset and the curvature radii in minor and major axes. The double-variable-curvature fiber endface (DVCFE) was manufactured thr

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49

Kumar, K. Vinod. "Study and Design of Automobile Continuously Variable Transmission." Thesis, 2015. http://ethesis.nitrkl.ac.in/7137/1/Study_Kumar_k_2015.pdf.

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An individual need not be an automobile designer to comprehend that the lesser fuel a motor devours the better it is, and the less poisons delivered, and the cleaner the air we inhale. Lamentably, enhancing the variables in that mathematical statement is getting to be progressively troublesome. To accomplish extra mileage changes, we have started to concentrate on expanding productivity in ranges where enhancements are significantly more troublesome and expensive to attain to - to a great extent on powertrain segments, for example, the transmission This stems from the way that transmissions wo

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50

Chao, Mei-Chen, and 趙梅貞. "Study For Taiwan’s Government Bond Yield and Macroeconomic Variable." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/afg5bw.

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碩士<br>銘傳大學<br>經濟學系碩士在職專班<br>95<br>Oil plays an important role in our daily life and economic activities, its price fluctuation casts immeasurable influence onto the boom and bust cycle, and the prosperity of the economy as whole. In the past few years, oil price surge frequently tops off the previous high’s. This not only registers new record, but also its upswing period lasts longer than previously observed. This research is to explore impacts onto Taiwan’s bond market from the perspectives of crude oil price fluctuation and macroeconomic variables during the most conspicuous period in the

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