beam_weight1122

time frequency analysis

对分类结果的精确度的统计，得出分类结果是否符合要求(The results of the classification accuracy of the statistics, the classification results obtained whether it meets the requirements)

DFT进行频谱分析时的三种现象 1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。 采样前加低通滤波器防混叠 2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。 改用其他窗函数（非矩形）改善泄漏。 3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。(DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.)

人工智能中比较经典的c-means算法的实现。在MATLAB中，数据使用矩阵存储比vc中好实现！(Comparison of artificial intelligence in the classic c-means algorithm. In MATLAB, the use of data storage than the vc matrix of the realization of good!)

matlab模拟产生中心应力集中光学条纹图，该程序可用来得到其巨齿包裹图，条纹中心线图。(matlab simulation center stress concentration arising from the optical fringe pattern, the program can be used to get its giant teeth parcel map, the centerline stripes Fig.)

这是一个产生混沌时间序列Chens吸引子的程序(Chens)

基于matlab的MUSIC及解相干MUSIC算法(MUSIC MUSIC and coherent solution algorithm based on the matlab)

说明：  实现期望最大化算法EM，对混合模型进行参数估计，得到参数的具体值。(The expectation maximization algorithm EM is implemented to estimate the parameters of the hybrid model and get the specific values of the parameters.)

《MATLAB电机仿真精华50例》书里面的各种模型( MATLAB simulation of the essence of 50 cases of motor book of various models)

Direct torque control based neural netwoek