HHT

介绍了图像处理的一般知识以及如何应用MATLAB进行图像处理(of image processing and general knowledge of how to use MATLAB for image processing)

说明：  在matlab环境下仿真实际弱目标的运动状况，利用差分得到实际目标的真实轨迹。(Matlab simulation environment in the actual movement of the weak state of the target, using the actual goal differential has been the true trajectory.)

LMS自适应滤波器做系统辨识，输入为高斯白噪声，可运行，有注释(LMS adaptive filter to do system identification, input Gaussian white noise can be run by a comment)

在采样点之间的频率响应是由各采样点的加权内插函数叠加而形成的，因而有一定的逼近误差。该误差大小取决于理想频率响应的形状，理想频响特性变化越平缓，内插值越接近理想值，逼近误差越小；反之，如果采样点之间的理想频响特性变化越陡，则内插值与理想值之间的误差越大，因而在理想滤波器不连续点的两边，就会产生尖峰，而在通带和阻带就会产生波纹。用频率采样法设计的实际滤波器频率响应如图1所示。由图1可知，实际滤波器的阻带衰减取决于内插函数第一旁瓣幅度值的大小，其大小决定了所设计的滤波器的阻带性能。(Interpolation function superimposed between sampling points of the frequency response is weighted within each sampling point and the formation of, and thus have a certain degree of approximation error. The size of this error depends on the shape of the ideal frequency response and the ideal frequency response characteristic change is more gentle, interpolated and more close to the ideal value, the smaller the approximation errors Conversely, if the sampling point between the ideal frequency response characteristics of the steeper the change, and then the interpolated the larger the error between the ideal value, and thus in the ideal filter both sides of the discontinuity point, will produce spikes occurs ripple in the passband and stopband. Actual design frequency sampling filter frequency response is shown in Figure 1. Figure 1 shows, the actual filter stopband attenuation depending on the interpolation value of the size of the first side-lobe amplitude of the function that determin)

电网暂态分析是保证电网稳定运行的重要手段。随着电网广域测量系统(wide-area management system， WAMS)的发展，电网形成了具有时空特性的高维海量运行数据。传统的电网暂态分析采用物理模型，用严格的数学公式关联维度之间数据，这种模型不能充分利用海量电网运行数据，造成资源浪费。从数据驱动的角度，首先分析 WAMS 数据的应用情况，考虑电网运行数据特点建立数据模型。然后利用随机矩阵理论(random matrix theory， RMT) 建立平均谱半径(mean spectral radius， MSR)评价指标，从整体上分析不同扰动对电网的影响。在整体分析电网运行状态的基础上，结合随机矩阵理论和时间序列分析(time series analysis， TES)建立量化评价指标，实现对扰动的影响程度分析和影响范围评估。(Power System Transient Stability Analysis Based on Random Matrix Theory)

introduction for plotting graphs in matlab

windows 驱动备份, 采用c sharp开发.(windows driver backup, using c sharp development.)

Simulink model of DFIG dc-grid

dtw的matlab程序的实现，已经编译通过的。(dtw the realization of Matlab procedures already adopted by the compiler.)

语音滤波短时能量 短时过滤率 端点检测 都能得到相应的仿真波形(Speech s filtering the short time percolation of a short time energy a rate to carry to order examinations can get to homologously imitate true wave a form)