simple_ipc

高斯建模实现图像背景生成，人有不妥之处，大家共同研究(Gaussian modeling of the background image generation, were something wrong with the common research)

说明：  基于MATLAB的差分进化算法优化神经网络的源程序(MATLAB based on the differential evolution algorithm for optimization of neural network source code)

带转矩内环的转速、磁链闭环矢量控制仿真模型(torque loop control)

一个50行的Matlab有限元程序（二维非线性问题），执行fem2d_nonlinear.m即可。(A 50-line Matlab finite element program (two-dimensional nonlinear problems), the Executive fem2d_nonlinear.m can.)

我写的灰色系统，包括最普通的GM(1,1)，新陈代谢模型，GM(2,1)模型，verhulst模型，编程全部根据《灰色系统理论及其应用》(these are all about grey model theory,including GM(1,1),GM(2,1),verhulst)

实现含风电场RX模型的系统潮流计算，风电场采用RX模型，此模型充分考虑风力发电机的输出功率特性，比其他模型完善，在模型中将迭代过程分为两步:常规潮流迭代计算和异步风力发电机的滑差迭代计算。( In short, the algorithm carried out to simulate the wind farmas an RX bus is as follows: 1)Begin with s=snorm in each machine, snorm being the rated slip of the same. With this value, calculate the impedance Z. 2)With these values, model the wind farm as an RX bus including the admittances of the machines in the admittance matrix and in the corresponding terms of the jacobian. 3)As a result of the first power flow, the voltages in the buses can be obtained. With these, can calculate the mechanical power of the machine. 4)With the value of s, calculate the power extracted the wind with . 5)Compare both powers and, if they are not equal, recalculate，by means of (G) and go to step 2. If they are equal, he algorithm finishes.)

codigo para crear cubo rotatorio con acercamintos y algunos para matrices y ecuaciones

基于上下文的算术编码，用于图像压缩中的熵编码环节。(Arithmetic coding for entropy coding in image compression link.)

 利用fft()进行快速傅立叶变换，得到频谱，画出正弦函数及其频谱  找出频谱中使得Y轴取最大值时的估计频率记为ft  加入白噪声，绘出信噪比和均方误差的关系曲线 ( using fft () for fast Fourier transformation, spectrum, to draw the sine function and its spectrum  find the spectrum makes the Y-axis maximum value when the estimated frequency is denoted by ft  adding white noise, SNR plot and mean square error curve)

数学建模中经常用到的23个经典算法，包括文档说明和相关代码。(23 classical algorithm often used in mathematical modeling, including the documentation and code.)