field

2-D finite element method code

解方程例子，含有很多例子，弄到可不容易，提供参考(Examples of solving equations, containing many examples is not easy to get and provide information)

A MODEL-BASED METHOD WITH JOINT SPARSITY CONSTRAINT FOR DIRECT

自己编写的现代谱估计方法中的Burg算法，并和MATLAB中的函数pburg函数进行对比，两个函数性能相当，便于大家学习掌握这个算法。(Modern spectral estimation methods have written Burg algorithm, and MATLAB functions pburg function comparison, the performance of the two functions is quite near to make you master this algorithm easily.)

说明：  研究分岔软件,最全最强大的非线性系统动态分岔与混沌分析软件(Research bifurcation software, the most powerful dynamic bifurcation and chaos analysis software for Nonlinear Systems)

此程序是计算wigner-ville分布、伪wigner-ville分布和平滑伪wigner-ville分布的程序，需要下载matlab时频分析工具箱(This procedure is the calculation wigner-ville distribution, pseudo-wigner-ville distribution and smooth pseudo-wigner-ville distribution procedures need to download the time-frequency analysis matlab toolbox)

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Cognitive radio code - detection a hole in spectrum

采用lms算法实现多径信号的波束形成，并且包括输出信干燥。该代码已经完全仿真过，绝对可以用(Lms algorithm using multi-path signal beamforming, and includes output signal dry. The code has been fully simulated, can surely be)

用cfd解1一维Riemann问题，采用二阶精度两步差分格式进行数值求解(Cfd solution with a one-dimensional Riemann problem, the use of second-order accurate numerical solution of the two-step difference scheme)