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为了精准、稳定地提取滚动轴承故障特征，提出了基于变分模态分解和奇异值分解的特征提取方法，采用标准模糊C均值聚类(fuzzy C means clustering, FCM)进行故障识 别。对同一负荷下的已知故障信号进行变分模态分解，利用 奇异值分解技术进一步提取各模态特征，通过FCM形成标准聚类中心，采用海明贴近度对测试样本进行分类，并通过计算分类系数和“卜均模糊嫡对分类性能进行评价，将该方法 应用于滚动轴承变负荷故障诊断。通过与基于经验模态分解的特征提取方法对比，该方法对标准FCM初始化条件小敏感，在同负荷故障诊断中表现出更好的分类性能 变负荷故障诊断时，除外圈故障特征线发生明显迁移，其他测试样本故障特征线仍在原聚类中心附近，整体故障识别率保持在100 ，因此，该方法能精确、稳定提取故障特征，为实际滚动轴承智能故障诊断提供参考。( In order to extract fault features of rolling bearing precisely and steadily, a method which is based on variational mode decomposition(VMD) and singular value decomposition was proposed for fault diagnosis using standard fuzzy C means clustering(FCM). First of all, the known fault signals measured in the same load but with different faults were decomposed by VMD, and the modes characteristics were further extracted using singular value decomposition technique,forming the standard clustering centers by FCM, and then the test samples were clustered by a Hamming nearness approach, and the classification performance was uated by calculating classification coefficient and average fuzzy entropy. At last, the method was applied in rolling bearing fault diagnosis under variable loads. By comparing with a method based on EMD, this approach is not sensitive to the initialization of standard FCM, and exhibits better classification performance in the same load fault diagnosis Fo)

稀疏主成分算法函数，内有详细的算法使用说明(SPCA function)

matlab通信仿真与应用(详细),是一套比较好的关于通信仿真书籍(matlab simulation and application of communication (in detail), is a relatively good simulation of books on communication)

大变形测量数字图像的种子点匹配方法（图像匹配)(Large Deformation Measurement of digital image matching method of seed points (matching))

利用Newton迭代法求解f(x)=(x-1)(x-2)(x-3)=x3-6x2+11x-6的根(solve the root of function: f(x)=(x-1)(x-2)(x-3)=x3-6x2+11x-6 by using Newton method)

这是对黑白图像进行伪彩处理的代码，把处理的图片换成自己电脑的图片即可运行(This is a black and white pseudo-color image processing code to handle the images into their computer to run pictures)

三相同步电机突然短路 simulink仿真程序 (Three-phase synchronous motor simulink sudden short-circuit simulation program)

说明：  关于超宽带（UWB）一些信道的matlab仿真程序。(On ultra-wideband (UWB) channel matlab simulation of some procedures.)

Matlab 和 C++混合编程详细介绍了两种不同环境下共同开发程序，突出了各自的优越性(Matlab and C++ mix programming explain in detail programming between two different developing environment.)

qr decompostion using new method