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We have been studying the performance of SiPM devices and Scintillation Plates read out with SiPM. Applications are for the detection of ionizing radiation, for example in particle and nuclear physics experiments. Results are presented on performance of the SiPM using pulsed LEDs and scintillating tiles excited by radioactive sources, and for SiPM devices that have been used to transduce waveshifted...
Particle filters have been successfully employed to track multiple-input multiple-output (MIMO) fiat fading channels for mobile wireless communications. However, an optimal importance density cannot be always found to optimize the performance of a particle filter. A suboptimal importance density such as the prior can be used; but it has a problem of ignoring the current observations. In addition,...
We have investigated optical filtering-effects when a spectrally-sliced ASE light is injected to a gain-saturated R-SOA. The resulting distortion in the output optical spectrum from an optical pass-band shape of AWG could significantly affect the transmission quality of the WDM-PON.
Since different multiwavelets, pre- and post-filters have different impulse responses and frequency responses, different multiwavelets, pre- and post-filters should be selected and applied at different noise levels for signal denoising if signals are corrupted by additive white Gaussian noises. In this paper, some fuzzy rules are formulated for integrating different multiwavelets, pre- and post-filters...
The difficulty for accurate determination of the angles of arrival (AOA) of signals arises from the optimization of likelihood functions of high dimension. Usually, a gradient-based technique is employed to find the optimum of the function. However, this method requires heavy computational work and the differentiability of the likelihood function. This paper presents two gradient-free methods: One...
In this work, we use theoretical tools to study the effects of noise on the ability of a cell to chemotax and, more specifically, how bacteria cope. We first use simulations to show that adaptation time (filter cutoff frequency) affects the chemotactic performance of the cell and that mere exists an optimal adaptation time that allows cells to chemotax tire furthest. Having shown that the adaptation...
This paper addresses the lack of robustness in the design of a classic self-tuning controller (STC); in particular the poor performance demonstrated if the time delay of the process is time varying. To avoid these problems, the implementation of a novel practical self-tuning controller (PSTC) is described. The PSTC employs plant excitation with a PRBS to ensure good model estimates, a process monitor...
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