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a phase delay code, a matlab source code

利用内点法计算电力系统潮流计算，matlab源代码(The use of interior point method to calculate the power flow calculation, matlab source code)

VMD算法程序，自己调好的可以直接运行，适合初学者。(VMD algorithm program, its own tune can be directly run, suitable for beginners.)

详细介绍了微弱信号的检测方法 ,做信号检测的可以参考下其中的经典方法(Details of the weak signal detection methods, signal detection can be done under one of the classical method of reference)

One-Dimensional Discrete Wavelet Transforms (One-Dimensional Discrete Wavelet Transf orms)

1. 给一段原始的语音信号（可以是自己录制的一段语音），加上一频率为3.8kHz的高频余弦噪声和频率为3.6kHz的高频正弦噪声（幅度自己可以选择），用窗函数设计一滤波器（要求最小阻带衰减为50dB）对加噪后的语音信号进行滤波，画出滤波器的频率响应曲线，画出滤波前后的时域图和频谱图。 需要用到的函数： fir1 用窗函数设计FIR滤波器的函数 2. 用GUI设计一界面（如图1所示）完成如下功能： 1） 输入一语音信号，画出语音信号的时域图和频谱图； 2） 对语音信号加噪处理，画出加噪后的时域图和频谱图； 3） 给定滤波器的性能指标，采用几种不同的方法设计滤波器对加噪信后进行滤波，画出各滤波器的频率响应曲线，画出滤波后的时域图和频谱图。 (1. to some of the original speech signal (which can be a voice you record yourself), plus a cosine frequency of 3.8kHz frequency noise and frequency of 3.6kHz frequency sinusoidal noise (in the range that they can choose), with a window function to design a filter (requires a minimum stop band attenuation is 50dB) after adding noise to the speech signal is filtered, the filter frequency response curve to draw, draw diagrams and time-domain spectrum before and after filtering. Need to use the function: function fir1 with window function design FIR filter design 2. Using a GUI interface (Figure 1) complete the following functions: 1) an input speech signal, the speech signal in the time domain to draw graphs and spectrum 2) adding noise to the speech signal processing, draw diagrams and time-domain plus noise spectrum after 3) to set the filter performance, using several different methods designed to filter letter after adding noise filtering, draw the frequency response curve of each )

该模型可以研究光储充直流微网的稳定性，母线电容参数设计，PI控制器参数设计等(The model can be used to study the stability of optical storage charging DC microgrid, bus capacitance parameter design, PI controller parameter design and so on.)

Ole Sigmund编写的99行Matlab程序是拓扑优化方面的经典案例。该程序有5个可修改的输入参数：竖直方向网格划分数nely,水平方向网格划分数nelx,保留的材料的体积分数volfrac,惩罚因子penal和滤波器大小rmin。加载方式矩阵F和支承方式fixeddofs也可以分别选取不同的方式或组合。(Ole Sigmund prepared by the 99-line Matlab program is a classic example of topology optimization. The program has five can modify the input parameters: the number of vertical mesh nely, the number of horizontal mesh nelx, keep the volume fraction of material volfrac, penalty factor penal and filter size rmin. Loading mode and the supporting means fixeddofs matrix F can also be selected separately or combined in different ways.)

说明：  利用MTALAB实现水液面的控制，控制效果极佳(Use MTALAB realize the liquid surface water control )

系统识别工具-ARX模型在线更新识别方法的matlab程序实现。(System identification tool-ARX model identification methods matlab online update program implementation.)