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1．窗口法设计FIR数字滤波器。 2．以Butterworth 模拟低通滤波器为原型，设计IIR数字滤波器。(1. Window Design of FIR digital filter. 2. In order Butterworth analog low-pass filter for the prototype, design IIR digital filter.)

通信实验中BPSK,QPSK,2FSK,16QAM调制解调仿真代码，实现调制解调和星座图的观察.(Communication experiments BPSK, QPSK, 2FSK, 16QAM modulation and demodulation simulation code that implements the modem and observation constellation.)

CAO、FNN算法计算混动时间序列的延迟时间(CAO delay time)

用工字型差分格式解拉普拉斯方程，简洁具体，效率高 (Employment the fonts differential format solution of the Laplace equation)

matlab code for reduction of ISI in digital communications

shiyanbaogao dajia manman de zhuanxin de kankan ba xiwangduidajia youhaochu xiexie (shiyan)

图论中的floyd算法。简单的小程序，可以插入任何过程中，方便实用。(In graph theory algorithms. Simple procedure, you can insert any process, convenient and practical.)

this is for finding the flames in the picture

计算一个方柱的散射的波形，并求其RCS。方柱的网格总数是N=500个，时间步为1200步。网格尺寸为lamda/18,时间间隔是ddx/2*c，c为光速。脉冲源位于中心。方柱边长为7*lamda。并与相同尺度的球的散射场进行对比(Calculate the scattered waveform of a square column and find its RCS. The total number of grids of the square column is N=500 and the time step is 1200 steps. The grid size is lamda/18, the time interval is ddx/2*c, and c is the speed of light. The pulse source is at the center. The side of the square column is 7*lamda. And compare the scattering field of the ball of the same scale)

说明：  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.)