Hongyun Wei

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is studied in this paper. A new coloring graph structure is presented based on the new, complex conditions. The former research on new circuits of closed-loop max-plus projection system is considered with only one feedback edge, but more feedback edges should be included in the new circuits is pointed out in this paper. Finally, a sufficient condition for(More)
Bone conduction has been used for speech enhancement in very noisy environments. It usually includes nonlinearity in transmission, small non-stationary noise due to body movements (friction, collision, wind noise, crosstalk and so on), serious attenuation of high frequency components, etc. These problems usually lead to poor intelligibility of(More)
In an active noise control (ANC) system, frequencies of the reference cosine and sine waves generated according to the online sensor information may be different from those of the primary noise to be suppressed, if the sensor contains error due to fatigue, aging etc. This difference, called frequency mismatch (FM), will severely deteriorate the performance(More)
AIM To analyze the changes of different Lactobacillus species in ulcerative colitis patients and to further assess the therapeutic effects of selected Lactobacillus strains on dextran sulfate sodium (DSS)-induced experimental colitis in BALB/c mice. METHODS Forty-five active ulcerative colitis (UC) patients and 45 population-based healthy controls were(More)
It has been widely recognized that conventional techniques and algorithms for speech enhancement indicate severe performance degradation when operated in a very harsh noise environment. In recent years, linear and nonlinear adaptive noise cancellers (ANC) have been developed for speech denoising, which use both bone- and air-conducted speech signals(More)
Broadband frequency-selective fading channels usually have the sparsity nature. By exploiting the sparsity, adaptive sparse channel estimation (ASCE) algorithms, e.g., least mean square with reweighted L1-norm constraint (LMS-RL1) algorithm, could bring a considerable performance gain under assumption of additive white Gaussian noise (AWGN). In practical(More)
In this paper, a hybrid nonlinear adaptive noise canceller (ANC) with single-or multi-reference channels is proposed to perform the task of extracting fetal electrocardiogram (FECG). A Volterra filter and a functional link artificial neural network (FLANN) are equipped in parallel in each reference channel to approximate the linearity and nonlinearity(More)
Adaptive Fourier analysis has numerous applications in biomedical engineering, music signal processing, digital communications, power engineering etc. So far, a lot of adaptive algorithms and systems have been developed and applied. In this paper, a variable step-size LMS (VSS-LMS) algorithm is proposed for adaptive Fourier analysis of noisy sinusoidal(More)
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