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This paper discusses principal component analysis (PCA) of integral transforms (spectra and autocovariance functions) of time-domain signals. It is illustrated using acoustic emissions from mechanical equipment. It was found that acoustic signals from different stages of operation appeared as...
This paper describes an ongoing programme of work designed to investigate dark discharge and photoconductivity in amorphous semiconductors with a view to applying these materials to industrial optical process tomography (OPT). Extensive laboratory equipment has been developed to investigate the...
The quartz crystals manufacturing process is in‘uenced by several factors that have a great in‘uence in the frequency behaviour of the crystals. Since it is necessary to develop designs with very strict specifications related to frequency stability, it is important to have a good knowledge of...
This paper discusses the estimation of the parameters (including the time delay) of a generalized single-input, single-output (SISO) process model from an appropriate number of arbitrarily specified points on the process frequency response. The method involves combining an analytical approach...
In this paper, a new class of modified Duffing equations with coupled periodic forcing and damping terms is developed, and the robust control problem for the system with structural uncertainty is studied systematically. This type of modified Duffing equations originates from swimming dynamics of...
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