Drawing

说明：  spwvd时频分析的MATLAB程序，包括源代码和求解SPWVD分布的M文件(SPWVD time-frequency analysis )

在Matlab simulink环境下编写的在滑模控制模型的四分之一车模型。 经仿真效果很好(In Matlab simulink environment written in the quarter-car model sliding mode control model. The simulation works well)

基于射线模型的浅海水声信道的仿真，采用解方程组算法得出本征路径数N，考虑多径和多普勒效应，并基于此加以自适应均衡技术进行均衡。(Ray simulation model of shallow water acoustic channel based on the use of solutions of equations or algorithms intrinsic number of paths N, consider multipath and Doppler effect, and based on this adaptive equalization techniques to be balanced.)

matlab经典算法的程序之规划问题，包含无约束规划，线性规划等程序(matlab program of classical planning algorithms, contains no constraint programming, linear programming and other procedures)

abaqus umat 用户子程序开发。动力显式模拟。完全编码加解释。(abaqus umat user subroutine development. Dynamic explicit simulation. Complete coding explanation.)

power_singlephaseASM.rar,功率电子领域matlab仿真文件，已经验证过，程序运行正常(power_singlephaseASM.rar,Power electronics field matlab simulation file, has already been verified, the normal operating procedures)

利用ABC(人工分群算法)求解数值计算问题。(ABC (artificial clustering algorithm) is used to solve numerical problems.)

this is code matlab for linear machine please try it

The PID controller is the most widely used controller in industrial systems. However, appropriately tuning a PID controller is not an easy task although it has only three parameters at most. This submission provides a tool for beginners to learn PID tuning.

matlab裂缝图像分割，先进行二值化，后边缘检测，最后用ostu类方间法阀值分割。(crack matlab image segmentation, binarization first, after edge detection, and finally between ostu class threshold segmentation method.)