Tesis sobre el tema "Area measurement"
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McPhail, Diane. "Area : the big cover-up". Thesis, View thesis, 2007. http://handle.uws.edu.au:8081/1959.7/27435.
Texto completoMcPhail, Diane. "Area the big cover-up /". View thesis, 2007. http://handle.uws.edu.au:8081/1959.7/27435.
Texto completo"A thesis submitted to the University of Western Sydney, College of Arts, School of Education in fulfilment of the requirements for the degree of Doctor of Philosophy." Includes bibliography.
Freeman, Matthew A. "Multi-area power system state estimation utilizing boundary measurements and phasor measurement units ( PMUs)". Thesis, Texas A&M University, 2006. http://hdl.handle.net/1969.1/4178.
Texto completoJones, Paul. "Electrical measurement of large area substation earth grids". Thesis, Swansea University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367883.
Texto completoHuang, Jiarui M. Eng Massachusetts Institute of Technology. "Automatic 3D surface area measurement for vitiligo lesions". Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113733.
Texto completoThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 62-64).
Vitiligo is a long term skin depigmentation disease that may result in psychological stress. Monitoring changes in vitiligo lesion area allows assessment of treatment efficacy and aids in clinical decision making. Currently existing approaches for vitiligo lesion measurement are either inefficient or inaccurate. Using a RGB-D camera (Kinect) and imaging processing techniques, we develop an automated skin lesion screening system (VLAMS) that can be widely adopted in clinics. VLAMS is tested using clinical medical data. Results show VLAMS can consistently segment target lesion region and accurately measure lesion area of any skin surface.
by Jiarui Huang.
M. Eng.
Lehmann, Timothy H. "Teaching area measurement and subgoals through problem solving". Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/117668/1/Timothy_Lehmann_Thesis.pdf.
Texto completoHurtgen, Michaël. "Wide-area state estimation using synchronized phasor measurement units". Doctoral thesis, Universite Libre de Bruxelles, 2011. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209924.
Texto completoThe classical state estimator currently used is based on SCADA (Supervisory Control and Data Acquisition) measurements. Weaknesses of the SCADA measurement system are the asynchronicity of the measurements, which introduce errors in the state estimation results during dynamic events on the electrical network.\\
Wide-area monitoring systems, consisting of a network of Phasor Measurement Units (PMU) provide synchronized phasor measurements, which give an accurate snapshot of the monitored part of the network at a given time. The objective of this thesis is to integrate PMU measurements in the state estimator. The proposed state estimators use PMU measurements exclusively, or both classical and PMU measurements.\\
State estimation is particularly useful to filter out measurement noise, detect and eliminate bad data. A sensitivity analysis to measurement errors is carried out for a state estimator using only PMU measurements and a classical state estimator. Measurement errors considered are Gaussian noise, systematic errors and asynchronicity errors. Constraints such as zero injection buses are also integrated in the state estimator. Bad data detection and elimination can be done before the state estimation, as in pre-estimation methods, or after, as in post-estimation methods. For pre-estimation methods, consistency tests are used. Another proposed method is validation of classical measurements by PMU measurements. Post-estimation is applied to a measurement set which has asynchronicity errors. Detection of a systematic error on one measurement in the presence of Gaussian noise is also analysed. \\
The state estimation problem can only be solved if the measurements are well distributed over the network and make the network observable. Observability is crucial when trying to solve the state estimation problem. A PMU placement method based on metaheuristics is proposed and compared to an integer programming method. The PMU placement depends on the chosen objective. A given PMU placement can provide full observability or redundancy. The PMU configuration can also take into account the zero injection nodes which further reduce the number of PMUs needed to observe the network. Finally, a method is proposed to determine the order of the PMU placement to gradually extend the observable island. \\
State estimation errors can be caused by erroneous line parameter or bad calibration of the measurement transformers. The problem in both cases is to filter out the measurement noise when estimating the line parameters or calibration coefficients and state variables. The proposed method uses many measurement samples which are all integrated in an augmented state estimator which estimates the voltage phasors and the additional parameters or calibration coefficients.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
Liu, Di. "Integral Measurement of Atmospheric Particulate Matter (PM)". VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5573.
Texto completoAntoine, Olivier. "Wide area measurement-based approach for assessing the power flow influence on inter-area oscillations". Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209368.
Texto completocentralized and the electricity had to be transmitted to the loads from the closest power
plant. Nowadays, there is an increasing integration of decentralized and intermittent pro-
duction. Moreover, the energy market coupling has enabled the transfer of electric power
for economical purposes. Also, former isolated power systems are now interconnected for
reliability and financial reasons.
All of these changes make difficult to predict the future behavior of the grid. Studies
are done in order to plan for the future needs of the system. However, building new in-
frastructures takes time and it is expected that these needs will not be completely fulfilled
in all the parts of the grid. Therefore, transmission of active power could be limited by
the existing infrastructure. For example, the presence of inter-area oscillations is often
the limiting factor when a high active power is transmitted on a long transmission line
between two groups of generators. Since higher levels of active power are exchanged on
longer distances, problems of inter-area oscillations may arise in power systems previously
not affected by this phenomenon.
In this work, a measurement-based approach, able to predict in the short-term the
future behavior of oscillations, is presented. This approach is complementary to the
long-term planning of the grid.
The mandatory first step towards a measurement-based approach is to have the ability
to extract useful information among a huge quantity of data. To face this issue, some
comparisons of data mining algorithms are performed. The proposed method combines
two decision tree algorithms to obtain both prediction accuracy and comprehensibility.
The second required step for building a measurement-based model is to take into
account the limitations of the measurements. Two types of wide area measurements are
used, synchronized measurements from PMUs and traditional unsynchronized data from
the SCADA/EMS system. Oscillation monitoring using PMUs is especially of interest
and an approach is presented to post-process damping estimates. This post-processing
method consists in a noise reduction technique followed by a damping change detection
algorithm.
Finally, the method, combining these two steps, is implemented to analyze the Con-
tinental European grid. This implementation takes place in the context of the European
project Twenties. The results, using several months of measurements, are described in
detail before being discussed.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished
McKean, Greg. "An investigation into year seven students' knowledge and understanding of area". Thesis, Queensland University of Technology, 1989. https://eprints.qut.edu.au/36697/1/36697_McKean_1989.pdf.
Texto completoPetriccione, Gregory James. "Design and integration of a large area warpage measurement system". Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/18207.
Texto completoKhatib, Abdel Rahman Amin. "Internet-based Wide Area Measurement Applications in Deregulated Power Systems". Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/28579.
Texto completoPh. D.
Tania, Mutmainna. "Wide Area Measurement Applications for Improvement of Power System Protection". Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19241.
Texto completoIn addition to the slow but steady variations in the network structure over a long term, the grid also experiences drastic changes during the occurrence of a disturbance. One of the main reasons why protection relays mis-operate is due to the inability of the relays to adjust to the evolving network scenario. Such failures greatly compound the severity of the disturbance, while diminishing network integrity leading to catastrophic system-wide outages. With the advancement of Wide Area Measurement Systems (WAMS), it is now possible to redesign network protection schemes to make them more adaptive and thus improve the security of the system.
Often flagged for exacerbating the events leading to a blackout, the back-up distance protection relay scheme for transmission line protection and the loss-of-field relay scheme for generator unit protection can be greatly improved from an adaptability-oriented redesign. Protection schemes in general would benefit from a power re-distribution technique that helps predict generator outputs immediately after the occurrence of a contingency.
Ph. D.
Nivens, Ryan Andrew. "Dilating Triangles: Using Measurement and Scale Factors to Investigate Area". Digital Commons @ East Tennessee State University, 2015. https://dc.etsu.edu/etsu-works/218.
Texto completoGhalambor, Afrooz y Madeleine Latifi. "Designing a Process Measurement Program as a part of Measurement & Analysis Process Area of CMMI Level 2". Thesis, Högskolan i Borås, Institutionen Ingenjörshögskolan, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-19577.
Texto completoHackett, Joshua Andrew. "Hydrogeology of the McKinney Butte Area: Sisters, Oregon". PDXScholar, 2011. https://pdxscholar.library.pdx.edu/open_access_etds/371.
Texto completoJones, Timothy David. "Improving the precision of leg ulcer area measurement with active contour models". Thesis, University of South Wales, 1999. https://pure.southwales.ac.uk/en/studentthesis/improving-the-precision-of-leg-ulcer-area-measurement-with-active-contour-models(b365998c-1ae3-44b1-8232-c5f4a8121f97).html.
Texto completoBabu, Srinivas Bandi Ramesh. "A measurement-based admission control mechanism for wireless local area networks". [Tampa, Fla] : University of South Florida, 2005. http://purl.fcla.edu/usf/dc/et/SFE0001403.
Texto completoBARIZON, BEN-HUR MONTEIRO. "PROPAGATION MEASUREMENT IN 2.4 GHZ FOR WIRELESS LOCAL AREA NETWORK PLANNING". PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5688@1.
Texto completoAs Redes locais sem fio (WirelessLAN ou WLAN) surgiram como uma alternativa as redes convencionais com fio (LAN), de uma forma mais flexível, de fácil configuração e boa conectividade em áreas fechadas (prediais) ou abertas (campus). Elas combinam a mobilidade do usuário com sua conexão a rede com taxas de comunicação de até 20 Mbps ou mais, empregando técnicas de espalhamento espectral (salto em frequência - FHSS ou sequência direta - DSSS) ou acesso por modulação de frequências ortogonais - OFDM, nas faixas de frequência de 900 MHz, 2.4 Ghz e 5.7 Ghz. Dependendo da tecnologia, faixa de frequência e ambiente de utilização, o alcance das WLAN pode variar de 30 a 250 metros, ou maiores distâncias com as evoluções deste padrão. O seu projeto requer o modelamento do canal de propagação em ambientes internos . Os métodos de previsão de perda de transmissão mais utilizados são de natureza semi-empírica, devido à complexidade do problema em que envolve múltiplos mecanismos de propagação como reflexão em paredes, pisos e tetos, difração em obstáculos e transmissão através de paredes e pisos. Além da perda de propagação deve ser considerado o problema do multipercursos que produz em espalhamento de retardos, o sinal recebido afetando a qualidade do sistema.
The Wireless Local Area Network (WirelessLAN or WLAN) appeared as an alternative the conventio nal Local Area Network (LAN), in a more flexible way, of easy configuration and good conectividade in closed areas (property) or open areas (campus). They combine user s mobility , his/her network connection with communication taxes of up to 20 Mbps or plus, using spread spectrum techniques (Frequency Hopping - FHSS or Direct Sequence - DSSS) or access for Orthogonais Frequency Division Modulation - OFDM, in frequency range of 900 MHz, 2.4 Ghz and 5.7 Ghz. Depending on the technology, frequency range and us e atmosphere, the reach of WLAN can vary from 30 to 250 meters, or larger distances with the evolutions of this pattern. This project requests the model of the propagation channel in internal atmospheres. The methods of forecast of transmission loss more used are of semi-empiric nature, due to the complexity of the problem in that it involves multiple propagation mechanisms as reflection in walls, floors and roofs, diffraction in obstacles and transmission through walls and floors. Besides the propagation loss it should be considered the problem of the multipath that produces in dispersal of retards, the received sign affecting the quality of the system.
Prasad, N. G. Narasimha Carleton University Dissertation Mathematics. "Small area estimation and measurement of response error variance in surveys". Ottawa, 1985.
Buscar texto completoMcCarthy, Michael. "A rectilinear and area position calibration facility of sub-micrometre accuracy in the range 100-200mm". Thesis, Cranfield University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364758.
Texto completoMarshall, L. "Year 7 students' understanding of the relationship between area and perimeter". Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 1997. https://ro.ecu.edu.au/theses/900.
Texto completoAlsafih, Hamza A. "Transmission stability enhancement using Wide Area Measurement Systems (WAMS) and critical clusters". Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.607141.
Texto completoChiow, Sheng-wey. "A precision measurement of the photon recoil using large area atom interferometry /". May be available electronically:, 2008. http://proquest.umi.com/login?COPT=REJTPTU1MTUmSU5UPTAmVkVSPTI=&clientId=12498.
Texto completoZand, Emad Dolatshahi. "Measurement of TOA using frequency domain techniques for indoor geolocation". Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0428103-130325.
Texto completoZographos, A. N. "A line-scan system for the inspection and measurement of cylindrical surfaces". Thesis, Nottingham Trent University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245636.
Texto completoO'Flynn, Alexander W. "Testing of Phasor Measurement Units (PMUs) for Distribution Network Applications". Thesis, Queensland University of Technology, 2020.
Buscar texto completoYoon, Yeo Jun. "Study of the utilization and benefits of phasor measurement units for large scale power system state estimation". Texas A&M University, 2005. http://hdl.handle.net/1969.1/3345.
Texto completoRetty, Hema A. "Evaluation and Standardizing of Phasor Data Concentrators". Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/32064.
Texto completoMaster of Science
Zora, Leydi Tatiana. "Thesis PMU Applications Prioritization Based in Wide Area Disturbance Events". Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/71829.
Texto completoMaster of Science
Mascolo, Rosario, C. Bruno, Rosa-Giglio P. De, G. Zorzi, F. Pepe y G. Calvanese. "Measurement of leather surface - 308: variability in the measurement using electronic and pin wheel devices on different kind of leathers". Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34264.
Texto completoGuenet, Frederique S. A. "Quantification of valvular regurgitation by proximal isovelocity surface area and magnetic resonance imaging". Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/11207.
Texto completoZandieh, Behdis. "Indoor Wireless Local Area Network (WLAN) : Measurement and Modeling from a user perspective". Thesis, KTH, Kommunikationssystem, CoS, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-92012.
Texto completoOm vi hade tillgång till detaljerade täckningskartor över lokala nätverk (WLAN), skulle både personal och utrustning kunna användas mer ändamålsenligt. Till exempel skulle mindre tid gå åt till att söka täckning. Dessutom skulle systemadministratörer förstå användningen av deras WLAN:s på ett bättre sätt, vilket skulle möjliggöra bättre planering av var nya accesspunkter ska installeras, var accesspunkter ska tas bort, var man ska byta antenntyp, osv. Detta examensarbete handlar om skapande av detaljerade täckningsmodeller för användning inomhus vilka genererats genom att mäta nätverkets styrka – detta för att göra det möjligt för båda användare och administratörer att visualisera nätverkstäckning. Idag kan en användare endast känna till accesspunkter som de just för tillfället hör – på den plats där de för tillfället befinner sig. Att ge användarna och administratörerna tillgång till en modell av täckningen över hela Campus skulle inte bara göra att de uppfattade den lokala täckningen utan hela täckningsmönster (eller avsaknaden därav). Dock finns för tillfället inga ändamålsenliga modelleringstekniker för de som utvecklar och sköter WLAN:s inomhus. Examensarbetet inleds med en del bakgrundsinformation och går därefter in på ett antal metoder för att kartlägga WLAN, både vad gäller prestanda och kostnad. Härefter presenteras ett antal relaterade projekt. Denna bakgrund är till för att motivera varför ett nytt verktyg behövs och vilka funktion ett sådant verktyg borde ha. Efter denna litteratur- och bakgrundsstudie gjordes en kartläggning av KTH Campus i Kista med användning av en nyligen utvecklad applikation. Applikationen togs fram för att på ett bättre sätt uppfylla kraven som följde av saknade funktioner i existerande verktyg. Dessutom gav utvecklingen av applikationen författaren en möjlighet att lära sig objektorienterad programmering med t ex C# och .NET-miljön. Att lära sig att använda denna nya programmeringsmiljö var en nödvändighet för att kunna bygga både en lättanvänd applikation och samla in data från systemet – de senare var oftast inte helt lätt. En av de största svårigheterna efter datainsamlingen var att hitta ett sätta att presentera den insamlade informationen samt hur presentationen ska variera beroende på användaren behov och uppgift. En första presentation av experimentdata presenteras som en manuellt ritad täckningskarta lagd ovanpå en vanlig karta. Nästa steg i examensarbetet är att undersöka hur man ska integrera experimentdata genom att använda Google:s SketchUp för att bygga en 3D-modell av WLAN-täckning på Campus i Kista. Framtida utveckling relaterad till detta examensarbete borde fokusera på hur man ska kunna automatisera datainsamlingen och presentationen av resulterande experimentdata.
Almutairi, Abdulaziz. "Enhancement of power system stability using wide area measurement system based damping controller". Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/enhancement-of-power-system-stability-using-wide-area-measurement-system-based-damping-controller(7d98d164-8051-4662-ad18-374620d28a00).html.
Texto completoSlama, Jens. "Evaluation of a new measurement method for tire/road noise". Thesis, KTH, MWL Marcus Wallenberg Laboratoriet, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-100770.
Texto completoYang, Xue Jiao. "Supervisory wide-area control for multi-machine power system". Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/supervisory-widearea-control-for-multimachine-power-system(6c0575f9-7b20-4751-9d67-276aaaa4c7b2).html.
Texto completoQuint, Ryan David. "Practical Implementation of a Security-Dependability Adaptive Voting Scheme Using Decision Trees". Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/35667.
Texto completoMaster of Science
Ashton, Phillip Michael. "Exploiting phasor measurement units for enhanced transmission network operation and control". Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/9063.
Texto completoYoungman, Elizabeth Anne. "The Development of Curriculum-based Measurement Local Norms in the Area of Written Expression". TopSCHOLAR®, 2010. http://digitalcommons.wku.edu/theses/174.
Texto completoRemmen, Krystle D. "A REACTIVE TRACER METHOD FOR THE MEASUREMENT OF SPECIFIC SURFACE AREA IN EGS RESERVOIRS". Thesis, California State University, Long Beach, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1527408.
Texto completoEarly thermal breakthrough is an issue of concern in the geothermal industry, especially with regard to engineered geothermal systems (EGS). Determination of the specific surface area (SSA) of the fluid/rock interface in an EGS is vital to predicting early thermal breakthrough. An approach to this problem involving the application of tracers with different sorption properties (lithium, bromide, and deuterium) is presented. Upon injection into a reservoir, these tracers react along the fluid/rock interface to varying degrees. The resulting breakthrough separation at the extraction well can be used to derive SSA by applying a modified form of the advection-dispersion equation. For proof of concept, field tests were conducted in a sandstone bedding-plane fracture near Chazy, New York. Results showed minimal breakthrough separation, indicating insufficient sweep of the fracture area, and that lithium was not an ideal tracer in this medium. However, a relative measure of SSA can still be derived.
McPhail, Diane, University of Western Sydney, College of Arts y School of Education. "Area : the big cover-up". 2007. http://handle.uws.edu.au:8081/1959.7/27435.
Texto completoDoctor of Philosophy (PhD)
Yang, Cheng-Han y 楊承翰. "Area-Efficient One-Period Delay Jitter Measurement". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/55031029915294714988.
Texto completo國立彰化師範大學
電子工程學系
97
In this thesis, a true one-period delay circuit is proved to be actually a synchronous mirror delay. An area-efficient all-digital synchronous mirror delay is thus developed as a true one-period delayline for cycle-to-cycle jitter measurement. In our preliminary work we develop an area-efficient SMD. The power dissipation can thus be also reduced. A VDL is designed for the testability of the SMD [11]. In the comparison pervious work, the author in [10] first develop a one period delay circuit. They add some control gates to a long VDL and generate the postponed signal and a one-period delayed signal with the same latency TD. It seems that they expected to measure the ith jitter T(i+1)-Ti via the second VERNIER DELAYLINE, however they actually capture the jitters, that is not the jitter compared to the previous period but the intrinsic jitter generated by their ONE PERIOD DELAY itself. In this thesis, the SMD is implanted to be a True One Period delayline. From measured results of implementation, the proposed true one-period delay jitter measurement circuit suffers low resolution but saves 75% of area overhead and the associated power dissipation.
SilviaJocunda y 岑宛珊. "Field Measurement and Analysis of Green Area Cooling Effect on Surrounding Area". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/9z7ks9.
Texto completoChen, Lang. "Wide-Area Measurement Application and Power System Dynamics". 2011. http://trace.tennessee.edu/utk_graddiss/1174.
Texto completoLin, Chia-Ying y 林佳瑩. "Intrusion Detection Based on Triangle Area Similarity Measurement". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/94727948405971840697.
Texto completo國立中正大學
會計與資訊科技研究所
96
Intrusion detection is a very important research issue in network security nowadays. Intrusion detection can be approached by data mining and machine learning techniques. In literature, advanced techniques by hybrid learning or ensemble methods have been considered, and they are superior to the models using single machine learning techniques. This thesis proposes a triangle area similarity measure combining the hybrid method, namely Triangle Area based Nearest Neighbors (TANN), in order to detect attacks more effectively. In TANN, we use k-means to obtain five cluster centers and transform data for k-NN classification by triangle area similarity measurement. By using KDDCup 99’ as the dataset and considering 10-fold cross validation, the experimental results show that TANN can effectively detect intrusion attacks and achieve higher detection and lower error rates than three baseline models based on support vector machines, k-NN, and the hybrid model combining k-means and k-NN.
Hsu, Yao-Wen y 許耀文. "The Measurement and Database of Hand Surface Area". Thesis, 2008. http://ndltd.ncl.edu.tw/handle/66256970144618224194.
Texto completo國立清華大學
工業工程與工程管理學系
96
This study is to measure hand surface area (HSA) and palm surface area (PSA) using 3-D scan, and establish the database and estimation formulae. The hand surface area is a very important reference in many applications. Nevertheless, the measurement methods of hand surface area were inaccuracy and the resultant data are significantly varied among different researches in the past. Thus there were wrong data and confused in practical application. Due to the advent of 3-D measurement technology, we intend to use the high resolution 3-D hand scanner to measure the hand of 270 samples, 135 for each gender. The samples will be proportionally drawn among 5 statures and 3 body weights based on population distribution. The precision and accuracy of the scanner is within 0.67%. We will apply the Anthro 3-D computing software to compute the two kind of hand surface area and the percentages of total body surface area to establish a hand surface area database. First, the results of HSA and PSA are tabulated on 15 strata for the male, the female and the Total (two genders combined). A comparison between this study and previous textbook values (such as the Lund and Browder chart and the UK teaching text) show that previous textbooks over estimated HSA 8.0 % and PSA 10.7% for the total. Gender, body weight group and stature group were significant factors. The mean %HSA/BSA and mean %PSA/BSA were found to be 2.29% (0.24%) and 0.89% (0.09%), respectively. Gender and body weight group were significant factors. Then 6 1-D measurements were extracted semi-automatically to be used as candidate estimators for HSA and PSA estimation formulae. Stepwise regressions on these 6 1-D measurements and variable dependency test were performed. The results show that with a pair of measurements -- hand length and hand breadth -- is able to account 96% of HSA variance and up to 98% of PSA variance. Finally, the accuracy of this study is better than previous studies.
YAN, LIANG-YU y 顏良宇. "Study on wide-area dynamic frequency measurement technology". Thesis, 2014. http://ndltd.ncl.edu.tw/handle/69632683386010634434.
Texto completo長榮大學
資訊管理學系(所)
102
The system frequency is an important parameter to observe the dynamics for a power system. The operation information of power systems, such as dynamic changes between supply and load, system operation conditions etc., can be observed through wide-area frequency measurement. In this thesis, a study on the core technologies of wide-area frequency measurement, synchronous sampling pulse generator and frequency calculation method, is conducted. A digital synchronous sampling pulse generator is developed with Hardware Description Language(VHDL) and synthesized into the FPGA. Its synchronization error can be maintained within 60 ns. For calculating values of frequency, a method, combining the reference model in IEEEC37.118.1-2011 standard and moving average approach, is developed. The accuracy of frequency calculation meets P-class requirements for steady-state and dynamic conditions in the IEEE standard.
Hou, Bo-Wen y 侯博文. "Large Power System Stabilization by Wide Area Measurement". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/65155882173493563041.
Texto completo國立臺灣海洋大學
電機工程學系
93
Wide area measurements in large-scale power systems have become feasible due to the technology of GPS-based Synchronized Phasor Measurement Units. Synchronized phasor measurements have been proven useful for many control and monitoring applications in power system. The purpose of this thesis is to study the improvement for system damping in Taipower system by installing power system stabilizers with wide area measurement. Furthermore, this thesis also includes the criteria of realistic application of the stabilizer such as: installation location, the selection of signals, and the impact to the whole system stability due to the signals transmission delay. In addition, the thesis analyzed the Inter-area mode in Taipower system, and verified the feasibility of installing such stabilizers in large power system.
Huang, Hsin-Mei. "Children's understanding of the concepts of area measurement /". 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3337796.
Texto completoSource: Dissertation Abstracts International, Volume: 69-11, Section: A, page: 4228. Adviser: Klaus G. Witz. Includes bibliographical references (leaves 172-180) Available on microfilm from Pro Quest Information and Learning.
LIN, CHI-TUN y 林奇暾. "Motor Performance Measurement with Controller Area Network Communication". Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5k636r.
Texto completo國立臺灣科技大學
電機工程系
106
This thesis is concerned with the development of motor performance measurement with controller area network (CAN) communication interface. The CAN protocol is the basis of communication network for the proposed method. Communication network connects motor power converters and its performance measurement scheme so that the monitor interface can be conducted by graph and chart control software called Labview. That is, the supervisor can monitor the performance of motor instantly. The CAN to universal serial bus (USB) converter with the CAN module in digital signal processor is used to implement the examination and scheduling for CAN. The high-performance and low-cost digital signal processor, TMS320F28069, is adopted as the system core. The power and efficiency calculations are conducted by the feedback signals of voltage, current, speed, and torque. When the speed of the three-phase induction motor(IM) is 2000 rpm, and the load torque is 5 N-m, the experimental results show that the input and output powers of the IM input power inverter are 1673.54 W and 1524.67 W, respectively, yielding an efficiency of 91.1%. The output power of IM is 1237.16 W and its efficiency is 81.14%. The three-phase permanent magnet synchronous generator(PMSG) operates in constant torque control for 5 N-m, so the electromagnetic torque of three-phase IM should be more than 5 N-m. Thus, the measured torque values of three-phase IM are larger than the commanded ones of three-phase PMSG. Comparing the results from the proposed method with power meter measurements, the differences of the input and output powers are 0.78% and 1.04%, respectively. The accuracy from the proposed measurements can match up with commercial instruments. The experimental results verify the implementation of both accurate data transfer from CAN to remote computer and its simultaneous control for the power converter. In conclusion, the experimental results verify the feasibility of the proposed method.