A novel pitch determination algorithm with binary lateral inhibition network (BLIN) is proposed in this paper. A thread like spectrum, which is composed of the fundamental frequency and its harmonic components, is a...A novel pitch determination algorithm with binary lateral inhibition network (BLIN) is proposed in this paper. A thread like spectrum, which is composed of the fundamental frequency and its harmonic components, is acquired by applying a BLIN to the short time spectrum of the speech signal. Then the pitch is determined by the average interval of harmonics. The algorithm is evaluated on COSDIC speech database. For comparison, the same results obtained from the same speech sample with the cepstrum and autocorrelation based pitch determination algorithms are also presented. The results show that the new algorithm is superior to the cepstrum and autocorrelation based pitch determination algorithms.展开更多
A wide variety of neurons and gIial cells differentiatefrom common precursor cells in the developing nervoussystem. During this process, Notch-mediated cell-cell in-teraction is essential for maintenance of dividing c...A wide variety of neurons and gIial cells differentiatefrom common precursor cells in the developing nervoussystem. During this process, Notch-mediated cell-cell in-teraction is essential for maintenance of dividing cells andsubsequellt generation of cell type diversity. Activation ofNotch inhibits cellular differentiation, and abnormality ofthe Notch pathway leads to premature neuronal differenti-ation, the lack of some cell types, and severe defects of tis-sue morphogenesis. Recent data demonstrate that Notchfails to inhibit cellular differentiation in the absence of thebHLH genes Hes1 and He5, which functionally afitago-nize the neuronal bHLH genes such as theh1- These re-sults indicate that the two Hes genes are essential effecorsfor the Notch pathway and that neuronal differentiation iscontrolled by the pathway "Notch-+He1/Hs5,Mish1".展开更多
A shadow detection method using pulse couple neural network inspired by the characters of human visual system is proposed.More precisely,lateral inhibition of human vision and coefficient of variation are combined tog...A shadow detection method using pulse couple neural network inspired by the characters of human visual system is proposed.More precisely,lateral inhibition of human vision and coefficient of variation are combined together to improve the pulse couple neural network.Shadow detection is considered to be a shadow region segmentation problem.Experiment shows that the presented method is consistent with human vision compared to shadow detection methods based on HSV and pulse couple neural network(PCNN) by both subjective and objective assessments.展开更多
文摘A novel pitch determination algorithm with binary lateral inhibition network (BLIN) is proposed in this paper. A thread like spectrum, which is composed of the fundamental frequency and its harmonic components, is acquired by applying a BLIN to the short time spectrum of the speech signal. Then the pitch is determined by the average interval of harmonics. The algorithm is evaluated on COSDIC speech database. For comparison, the same results obtained from the same speech sample with the cepstrum and autocorrelation based pitch determination algorithms are also presented. The results show that the new algorithm is superior to the cepstrum and autocorrelation based pitch determination algorithms.
文摘A wide variety of neurons and gIial cells differentiatefrom common precursor cells in the developing nervoussystem. During this process, Notch-mediated cell-cell in-teraction is essential for maintenance of dividing cells andsubsequellt generation of cell type diversity. Activation ofNotch inhibits cellular differentiation, and abnormality ofthe Notch pathway leads to premature neuronal differenti-ation, the lack of some cell types, and severe defects of tis-sue morphogenesis. Recent data demonstrate that Notchfails to inhibit cellular differentiation in the absence of thebHLH genes Hes1 and He5, which functionally afitago-nize the neuronal bHLH genes such as theh1- These re-sults indicate that the two Hes genes are essential effecorsfor the Notch pathway and that neuronal differentiation iscontrolled by the pathway "Notch-+He1/Hs5,Mish1".
基金Projects(61262032,61173122)supported by the National Natural Science Foundation of ChinaProject(12JJ038)supported by the Key Project of Natural Science Foundation of Hunan Province,China+1 种基金Project(2012FJ3100)supported by the Hunan Provincial Science&Technology Department,ChinaProject(12B103)supported by the Youth Project of Hunan Universities and Colleges Science Research,China
文摘A shadow detection method using pulse couple neural network inspired by the characters of human visual system is proposed.More precisely,lateral inhibition of human vision and coefficient of variation are combined together to improve the pulse couple neural network.Shadow detection is considered to be a shadow region segmentation problem.Experiment shows that the presented method is consistent with human vision compared to shadow detection methods based on HSV and pulse couple neural network(PCNN) by both subjective and objective assessments.
