psnr

entering a vector k and M and N as matrix dimensions it generates an M by N matrix containing elements of k where each element is placed in the matrix such that number of column multiplied by number of column gives the element value.

Subroutines for basic 3D linear elastic elements Subroutines for basic 3D linear elastic elements

用matlab编的联合处理的程序，是使用和不使用的比较(Joint processing using matlab program, and does not use a comparison)

检验实际分布是否与理论密度分布函数相符合。球面均匀分布的随机点在二维平面上的投影的密度分布(Verify whether the actual distribution consistent with the theoretical density distribution function. Spherical uniformly distributed random dot density distribution projected on a two-dimensional plane)

机床主轴回转精度模拟，可以求其回转精度，圆度误差等(Spindle rotation accuracy simulation, you can find its rotary precision, roundness error, etc.)

卡尔曼滤波器的Simulink仿真，完全可以实用！(Kalman filter Simulink simulation, can be useful!)

本程序采用的是基于matlab的PQ分解法潮流计算，程序主要分为三个部分：第一部分用于生成系统的节点导纳矩阵。第二部分主要进行潮流系统的迭代运算。第三部分主要用于对程序最后输出结果的计算，如电压的幅值，相角，功率分布等。(This procedure is used in matlab the PQ decomposition method based on flow calculation, the program is divided into three parts: The first part of the node admittance matrix used to generate the system. The second part of the iteration trend system. The third part is mainly used for the calculation of the final output of the program, such as the amplitude of the voltage, phase angle, power distribution.)

说明：  计算一端固定另一端自由梁结构的固有模态，有限元单元选择的为二自由度埃尔米特单元(calculation natural frequences of the beam structure)

说明：  该文件是基于simulink与matlab结合的DQPSK系统仿真，最终结果为信噪比--误码率曲线图。(The file is based on Simulink and MATLAB combined DQPSK system simulation, the final result is signal to noise ratio - bit error rate curve.)

Numerical analysis （Gauss、Bisection、jacobi、Lagrange、Newton、powermethod等）(Numerical analysis (Gauss, Bisection, jacobi, Lagrange, Newton, powermethod, etc.))