cannyedgedetection

用PCA在一组数维中找到主十得到主元分析，用于MACHINE LEARNING 中初步学习者(use pca find the principle component int the dataset)

Matrix multiplication for two input matrices

这个包包括了一个多类代价敏感学习方法Rescalenew。这是一个通用的方法,如instance-weighting, sampling, threshold-moving等。(This package includes a multi-class cost-sensitive learning method Rescalenew. This is a general method which can be realized in many ways such as instance-weighting, sampling, threshold-moving, etc. This package includes five implementations of the method, that is, instance-weighting+C4.5, over-sampling+C4.5, under-sampling+C4.5, threshold-moving+NN and threshold-moving+PETs (probability estimation trees). )

2. 设 是窄带信号，定义 是在 区间上均匀分布的随机相位。 是寬带信号，它是一个零均值、方差为1的白噪音信号e(n)激励一个线性滤波器而产生，其差分方程为 。 1） 计算 和 各自的自相关函数，并画出其函数图形。根据此选择合适的延时，以实现谱线增强。 2） 产生一个 序列。选择合适的 值。让 通过谱线增强器。画出输出信号 和误差信号e(n)的波形，并分别与 和 比较。 (Computer Experiments: 1. Consider an AR process x(n) defined by the difference equation where v(n) is an additive white noise of zero mean and variance .The AR parameters and are both real valued: a) Calculate the noise variance such that the AR process x(n) has unit variance .Hence , generate different realization of the process x (n). b) Given the input x (n), an LMS filter of length M = 2 is used to estimate the unknown AR parameters and . The step size is assigned the value 0.05. Compute and plot the ensemble average curve of and by averaging the value of parameters and over an ensemble of 100 different realization of the filter. Calculate the time constant according to the experiment results and compare with the corresponded theoretical value. c) For one realization of the LMS filter, compute the prediction error And the two tap-weight errors and Using power spectral plots of , show that)

matlab 同步电机 部件，压缩包参数可调(matlab synchronous motor parts, adjustable compression package parameters)

Speech Recognition all source

将角度和幅度的二维数组画成dB值的polar图( POLARDB Polar coordinate plot. POLARDB(THETA, RHO) makes a plot using polar coordinates of the angle THETA, in radians, versus the radius RHO in dB. The maximum value of RHO should not exceed 1. It should not be normalized, however (i.e. its max. value may be less than 1). POLAR(THETA,RHO,S) uses the linestyle specified in string S. See PLOT for a description of legal linestyles. )

关于恶意代码检测和LTE网络，4G的LTE-A网络的外语文章(Foreign-language article about malicious code detection and lte network, lte-a network of 4g)

 利用fft()进行快速傅立叶变换，得到频谱，画出正弦函数及其频谱  找出频谱中使得Y轴取最大值时的估计频率记为ft  加入白噪声，绘出信噪比和均方误差的关系曲线 ( using fft () for fast Fourier transformation, spectrum, to draw the sine function and its spectrum  find the spectrum makes the Y-axis maximum value when the estimated frequency is denoted by ft  adding white noise, SNR plot and mean square error curve)

机械齿轮的参数优化，设计一直齿圆柱齿轮传动, 已知其齿数比u= 4, 小轮轴 扭矩T 1= 100N. m, 单向传动, 润滑良好, 非对称布置, 两齿 轮材料 小齿轮40Cr, 调质, 齿面硬度HB= 250~ 280, [ RH ] 1 = 630MPa, [ RF ] 1= 288MPa 大齿轮45 钢, 调质, 齿面硬度 HB= 220~ 250, [ RH ] 2= 550MPa, [ RF ] 2= 204MPa, 取载荷系 数K = 1. 28。(Parameter optimization of the mechanical gear design has been Cylindrical Gear, known gear ratio u = 4, small axle torque T 1 = 100N m, one-way transmission, well-oiled, non-symmetrical arrangement of the materials of the two gears pinion 40Cr quenched and tempered tooth surface hardness HB = 250 ~~ 280 [RH] 1 = 630 MPa [RF] 1 = 288MPa large gear 45 steel, quenched and tempered tooth surface hardness HB = 220 to 250, [RH] = 550MPa , [RF] 2 = 204MPa, to take load factor K = 1 28.)