Image-code

code to work with bathymetry (.nc files) for ocean modeling

％ 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)

In addition to being inherently more efficient, it introduces optional arguments - to calculate in single precision - to calculate only hue or saturation or value (or combinations of them)

A image with bad contrast is hard to be segmented. So this function analysis the RGB chennel, find the worse distributed chennel and fix it , then the result is a normal contrast image

三相PWM整流器，单极性SPWM控制，双闭环控制(three-phase PWM rectifier，Single polarity Double closed loop )

求解庞加莱映射及吸因子程序 求解动力学微分方程(poljialai plot)

牛人的图像分割的代码，文件夹里附带算法的参考文章，值得学习(image segmentation)

matlab code for DFE which id for ISI equaliser

改进的微分先行PID控制算法仿真源程序。 适用于输入信号跳变剧烈的场合，避免骤升或骤降时引起的系统震荡。(Improved differential forward PID control algorithm simulation source. Applied to the input signal transitions dramatic occasions, to avoid swells or sags caused when the system oscillation.)

说明：  运用matlab对管道进行传热计算的基础程序(Pipe heat transfer calculation)