Dissertations / Theses on the topic 'Time-varying Efficiency'
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Festger, Adam Douglas. "Analysis of hydraulic capture zones and efficiency under time-varying flow and pumping conditions." Thesis, The University of Arizona, 2000. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_2000_30_sip1_w.pdf&type=application/pdf.
Full textLiu, Yuna. "Essays on Stock Market Integration - On Stock Market Efficiency, Price Jumps and Stock Market Correlations." Doctoral thesis, Umeå universitet, Nationalekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-119873.
Full textBurchett, Woodrow. "Improving the Computational Efficiency in Bayesian Fitting of Cormack-Jolly-Seber Models with Individual, Continuous, Time-Varying Covariates." UKnowledge, 2017. http://uknowledge.uky.edu/statistics_etds/27.
Full textPerelman, Erez. "Characterizing time varying program behavior for efficient simulation." Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2007. http://wwwlib.umi.com/cr/ucsd/fullcit?p3259366.
Full textTitle from first page of PDF file (viewed June 22, 2007). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references (p. 167-173).
Johansson, Jimmy. "Efficient Information Visualization of Multivariate and Time-Varying Data." Doctoral thesis, Linköping : Department of Science and Technology, Linköping University, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11643.
Full textVengattaramane, Kameswaran. "Efficient Reconstruction of Two-Periodic Nonuniformly Sampled Signals Applicable to Time-Interleaved ADCs." Thesis, Linköping University, Department of Electrical Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-6253.
Full textNonuniform sampling occurs in many practical applications either intentionally or unintentionally. This thesis deals with the reconstruction of two-periodic nonuniform signals which is of great importance in two-channel time-interleaved analog-to-digital converters. In a two-channel time-interleaved ADC, aperture delay mismatch between the channels gives rise to a two-periodic nonuniform sampling pattern, resulting in distortion and severely affecting the linearity of the converter. The problem is solved by digitally recovering a uniformly sampled sequence from a two-periodic nonuniformly sampled set. For this purpose, a time-varying FIR filter is employed. If the sampling pattern is known and fixed, this filter can be designed in an optimal way using least-squares or minimax design. When the sampling pattern changes now and then as during the normal operation of time-interleaved ADC, these filters have to be redesigned. This has implications on the implementation cost as general on-line design is cumbersome. To overcome this problem, a novel time-varying FIR filter with polynomial impulse response is developed and characterized in this thesis. The main advantage with these filters is that on-line design is no longer needed. It now suffices to perform only one design before implementation and in the implementation it is enough to adjust only one variable parameter when the sampling pattern changes. Thus the high implementation cost is decreased substantially.
Filter design and the associated performance metrics have been validated using MATLAB. The design space has been explored to limits imposed by machine precision on matrix inversions. Studies related to finite wordlength effects in practical filter realisations have also been carried out. These formulations can also be extended to the general M - periodic nonuniform sampling case.
Tuffner, Francis K. "Computationally efficient weighted updating of statistical parameter estimates for time varying signals with application to power system identification." Laramie, Wyo. : University of Wyoming, 2008. http://proquest.umi.com/pqdweb?did=1674094221&sid=4&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Full textAlrabadi, Dima W. H. "Systematic Liquidity Risk and Stock Price Reaction to Large One-Day Price Changes: Evidence from London Stock Exchange." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4323.
Full textYarmouk University, Jordan.
Alrabadi, Dima Waleed Hanna. "Systematic liquidity risk and stock price reaction to large one-day price changes : evidence from London Stock Exchange." Thesis, University of Bradford, 2009. http://hdl.handle.net/10454/4323.
Full textSando, Simon Andrew. "Estimation of a class of nonlinear time series models." Thesis, Queensland University of Technology, 2004. https://eprints.qut.edu.au/15985/1/Simon_Sando_Thesis.pdf.
Full textSando, Simon Andrew. "Estimation of a class of nonlinear time series models." Queensland University of Technology, 2004. http://eprints.qut.edu.au/15985/.
Full textChun, Chiu YiI, and 邱意淳. "High-Efficiency Prony-Based Algorithm for Time-Varying Power Signal Estimation." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/52473577196075665060.
Full text國立彰化師範大學
機電工程學系
99
ABSTRACT With the widespread use of nonlinear loads in the power system, harmonic distortion causes a serious pollution of power quality. Besides, the power unbalance between the generation and the load demand would make the fundamental frequency varying with time. These disturbances may introduce operational problems of power system equipments. Therefore, improving the power quality has become a great concern for both utilities and customers. The frequency-domain methods have been widely used for the signal processing because of its computational efficiency. In addition, most power meters adopt FFT-based algorithm to analyze the harmonics and to show the frequency spectra. However, the FFT-based algorithm is less accurate if the system frequency varies and the frequency resolution decreases. The analysis results will show errors caused by the leakage and picket-fence effects. Therefore, how to achieve both the high resolution and efficiency is worth investigating. According to aforementioned facts, this thesis proposes a Prony-based improved algorithm for harmonics and interharmonics measurement. Not only the calculation time is reduced, but also the result is with a better accuracy, even if the power signals contain frequency variations and non-integer harmonic components. Finally, the thesis applies LabVIEW and the dedicated hardware to design a simple setup for measuring power quality signals. The performance of improved algorithm is validated by testing the synthesized and actual signals. Key Words: Harmonics, System Frequency Variation, Fast Fourier Transform, Prony's Method, LabVIEW
Ma, Ni. "Efficient Simulation and Performance Stabilization for Time-Varying Single-Server Queues." Thesis, 2019. https://doi.org/10.7916/d8-fjv9-zj35.
Full textSchellmann, Jan Malte [Verfasser]. "Multi-user MIMO-OFDM in practice : enabling spectrally efficient transmission over time-varying channels / vorgelegt von Jan Malte Schellmann." 2009. http://d-nb.info/99706546X/34.
Full textMergner, Sascha. "Applications of Advanced Time Series Models to Analyze the Time-varying Relationship between Macroeconomics, Fundamentals and Pan-European Industry Portfolios." Doctoral thesis, 2008. http://hdl.handle.net/11858/00-1735-0000-000D-F159-E.
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