10.1.1.134.4053-(2)

matlab交叉验证cross Validation，把样本集分为训练集和测试集，防止网络出现过拟合，提高网络的泛化能力和预测精度(cross Validation for matlab，to estimate the test accuracy,training accuray and validation accuracy of a neural network)

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letter A draw using B-spline. implementation in matlab

短时能量，平均幅度，短时过零率，端点检测。(Short-term energy, amplitude, short-term zero crossing rate, endpoint detection.)

ixneighbors returns the indices of neighbor cells in a n*m matrix A. ic and icd are column vectors of same length where ic are the indices of cells in A and icd are the indices of the neighbor cells.

这是基于傅里叶变化的压缩感知稀疏分解方法，使用的是匹配追踪算法，对初学者很有帮助(This is based on Fourier transform of compressed sensing sparse decomposition method, using the matching pursuit algorithm, useful for beginners)

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cluster validity measure and its applicatio

K邻域模式识别方法 KNN算法不仅可以用于分类，还可以用于回归。通过找出一个样本的k个最近邻居，将这些邻居的属性的平均值赋给该样本，就可以得到该样本的属性。更有用的方法是将不同距离的邻居对该样本产生的影响给予不同的权值(weight)，如权值与距离成正比。(k-Nearest Neighbor algorithm )

说明：  设计低通IIR滤波器；并将此低通滤波器映射为高通、带通或带阻滤波器。并验证变换后的滤波器是否满足指标。并求输入x(n)=[cos(w1n)+cos(w2n)]u(n)经过系统后的输出y(n)(Low-pass IIR filter design and mapping this low-pass filter high pass, band pass or band stop filter. And verify whether the filter transformation to meet the target. And to seek input x (n) = [cos (w1n)+ cos (w2n)] u (n) through the system output after the y (n))