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a tree dimensional PML code fdtd3D_UPML

％ 该Matlab程序基于牛顿－拉夫逊算法，用于计算已知导纳矩阵、PQ节点、PV节点、平衡节点(UA)的电力网络潮流 ％ U - 各节点母线电压 S - 各节点注入功率 S_net - 电力网络总损耗 ％ PQ_P - 实算PQ节点注入有功功率 PQ_Q - 实算PQ节点注入无功功率 ％ delt_PQ_P - 实算PQ节点有功功率修正值 delt_PQ_Q －实算PQ节点无功功率修正值 ％ delt_UA_P - 实平衡节点有功功率修正值 delt_U_2 - 实平衡节点电压平方修正值 ％ delt_PQV - 实算P Q U^2修正值 J - 雅可比矩阵 ％ e - 电压实部 f - 电压虚部 delt_ef - 电压实部与虚部修正值( The Matlab program based on the Newton- Raphson algorithm is used to calculate the admittance matrix is known, PQ node, PV node, the node balance (UA) the trend of the electricity networks U- the node bus voltage S- each node injection power S_net-- The total loss of electric power networks PQ_P- operator PQ is injected into active nodes PQ_Q- operator PQ is injected reactive power node delt_PQ_P- is considered the correct value of active power PQ node delt_PQ_Q- really count PQ node reactive power to amend the value of delt_UA_P- real active power balance of the correct value of the node delt_U_2- node voltage balance is the correct value of the square of delt_PQV- really count PQU ^ 2 the correct value of J- Jacobian matrix e- voltage real part f- the imaginary part of voltage delt_ef- voltage real part and imaginary part of the amendment value)

通过史密斯圆图进行相关计算 求得输入阻抗( Correlation calculation determined by the input impedance Smith chart)

声纹识别MATLAB源程序全代码，可以用来做密码锁，声控装置。(Voiceprint identification of all MATLAB source code can be used to make locks, voice-activated device.)

matlab，生成任意一元连续分布随机数(Generate any random numbers)

一些关于压缩感知（CS）的小程序，主要是压缩感知的重构算法(Some compression perception (CS) program, compressed sensing reconstruction algorithm)

根据15个星历参数计算卫星地心地固坐标系下的速度，位置（6个开普勒轨道参数，9个摄动参数）(compute satellite postion)

zcr : ampzcr.m -- short time energy and zero crossing rate program vad.m -- endpoint detection

程序作用是用于典型混沌时间序列的混沌特性分析。(Application for analysis chaotic characteristics of typical chaotic time series.)

利用MATLAB中的GUI（图形用户界面），实现图像的灰度化，直方图，图像的错切变换，直方图均衡化，量化图像及图像的傅里叶频谱，是效果更加明显。(In MATLAB GUI (graphical user interface), to achieve graying, histogram, image conversion cut the wrong image, histogram equalization, quantized image and the image of the Fourier spectrum of the effect is more obvious.)