Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 133 for “"Spectrum analysis"”.
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Spectrum analysis in seismology
Thesis. (Ph.D.) Massachusetts Institute of Technology. Dept. of Geology and Geophysics, 1954.
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Bayesian singular spectrum analysis with state dependent models
The analysis of time series using Singular Spectrum Analysis has become an important area of statistics with application in a variety of fields such as economics, geophysics, engineering, medicine and many others. In fact, in this method there is no need to make any statistical assumptions such as …
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Theoretical advancements and applications in singular spectrum analysis.
Singular Spectrum Analysis (SSA) is a nonparametric time series analysis and forecasting technique which has witnessed an augment in applications in the recent past. The increased application of SSA is closely associated with its superior filtering and signal extraction capabilities which also …
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Multivariate Nonstationary Time Series: Spectrum Analysis and Dimension Reduction
… in modern multivariate nonstationary time series analysis: spectrum analysis and dimension reduction. The first part of the dissertation introduces a nonparametric approach to multivariate time-varying power spectrum analysis. The procedure adaptively partitions a time series into an unknown …
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Reduction of wind induced microphone noise using singular spectrum analysis technique
… The new technique is based on the Singular Spectrum Analysis methodwhich has recently seen many successful paradigms in the separation of biomedical signals, e.g., separating heart soundfrom lung noise. It has also been successfully implemented to de-noise signals in various applications.The …
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Non-intrusive noise measuring on a television picture using spectrum analysis
… through system and viewer constraints. Through spectrum analysis it will be proved that a television picture can indeed be characterized. For it to be acceptable to the general viewing public, it has to have a spectrum that is rapidly decreasing with increasing frequency. In fact, at the highest …
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One-dimensional wave spectrum analysis of wind waves off Cape Town
… spectra were computed from the records, by power spectrum analysis, based on the method of Blackman and Tukey, using an I.B.M. 1130 Computer. Assumptions of normality and stationarity were tested. The Gaussian assumption of the waves was found to be acceptable for the waters off Cape Town. At the …
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Change Point Detection in Time Series via Multivariate Singular Spectrum Analysis
… that combines a variant of multivariate singular spectrum analysis (mSSA) approach with the cumulative sum (CUSUM) procedure for sequential hypothesis testing. In particular, we model the underlying dynamics of multivariate time series observations through the spatio-temporal model introduced …
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Overlapped speech and music segmentation using singular spectrum analysis and random forests
… method of audio decomposition using Singular Spectrum Analysis (SSA) that has been studied extensively and has received increasing attention in the past two decades as a time series decomposition method with many applications; adoption and development of driven classification methods; and …
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On the feasibility of the communications in the TVWS spectrum analysis and coexistence issue
… from using only a small part of the wireless spectrum, nominally less than 10% under 3 GHz. Nowadays, the vast majority of the available spectral resources have already been licensed. Measurements made by the Federal Communication Commission (FCC) have shown that a great part of the spectrum, …
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Multivariate Singular Spectrum Analysis: A Principled, Practical, and Performant Solution for Time Series Imputation and Forecasting
The analysis of multivariate time series data is of great interest across many domains, including cyber-physical systems, finance, retail, healthcare to name a few. A common goal across all of these domains is accurate imputation and forecasting of multivariate time series in the presence of noisy …
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The application of a logarithmic sector of many steps to plate calibration and quantitative spectrum analysis
no abstract provided by author
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Power spectrum analysis of heart rate fluctuations : the renin-angiotensin system's role as short term cardiovascular control system
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1981.
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Mary Somerville and Margaret Huggins: a collaborative voice at the embryonic stages of nineteenth-century astronomical specializations
… research. Mary Somerville used prismatic analysis to separate solar rays and Margaret Huggins applied photography to spectrum analysis. How these scientific persons wrote about their experiments and outcomes in scientific papers will be assessed. My work will demonstrate that both …
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A study of 2-stroke marine diesel engine characteristic based on condition based maintenance
… marine industries and commercial sector. Wave spectrum analysis using Ultrasonic wave sensor is one of the CBM method that can be applied for early identifying the excessive friction. In this study, both condition based maintenance and wave spectrum analysis be utilized together for identifying …
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Collective analog bioelectronic computation
… integrated circuit. It allows ultra-broadband spectrum analysis of RF signals to be performed in a rapid low-power fashion, thus enabling applications for universal or software radio. The second example exploits detailed similarities between the equations that describe chemical-reaction …
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Fiber optic methods for nondestructive testing
… acoustic wave (SAW) amplitudes. The J1..J4 spectrum analysis technique is used for calibrating the piezoelectric transducer cylinder (PZT) and JO/J2 spectrum analysis technique is used for demodulating the SAW signal from the interferometer. An extrinsic Fabry-Perot interferometric (EFPI) …
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Study of base isolation systems
… using comprehensive finite element structural analysis software package SAP200. Time history analysis was conducted for the 1940 El Centro earthquake. Response spectrum analysis was employed to investigate the effects of earthquake loading on the structure. In addition, the building lateral …
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