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2019, Journal of Industrial and Engineering ChemistryCitation Excerpt :Tracers that are used in RTD experiments must be easily detectable. Researchers usually use radioactively labeled tracers [4,10,11], dyes (UV–vis detection) [12], or conductive solutions [13–17]. Due to the two phase flow in the SFR, and compact construction of the device, tracking of the liquid phase behavior is hindered.
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2015, Chemical Engineering JournalCitation Excerpt :To mitigate these problems, several investigators have therefore implemented noise filtering techniques [26,28,29,31,39]. In the current work, the filtering method in the frequency domain as proposed by Mills and Dudukovic [26], and which relies on the method of regularization that was refined by Hunt [39,40] [27], will be employed. If an estimate of the MSE can be made, then a 1-D root finding method will permit a preliminary estimate of the filtering parameter γ.
Kernel methods in system identification, machine learning and function estimation: A survey
2014, AutomaticaCitation Excerpt :This means that system identification is an example of an inverse problem: indeed, finding the impulse response from observed data is a deconvolution problem. Such problems are quite ubiquitous and appear in biology, physics, and engineering with applications e.g. in medicine, geophysics, and image restoration (Bertero, 1989; De Nicolao, Sparacino, & Cobelli, 1997; Hunt, 1970; Tarantola, 2005). The problem is non trivial as convolution is a continuous operator, e.g. on the space of square integrable functions, but its inverse may not exist or may be unbounded (Phillips, 1962).
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