programming_tips

It is great model of one part of engine diesel model. This particular file contains model of EGR valve. .

一种用于雷达中的信号检测程序，是一个仿真程序，验证对信号的估计(A kind of signal detection procedures used in radar, is a simulation program to signal to verify the estimate )

高压直流输电模型，6个脉动模型，仿真故障，参考电流变化(HVDC model)

4A finite-sample simulation study of cross validation in tree-based models. 05-15

细菌群趋药性算法的程序，网上到处找也没有，我就自己编了个，如果有bug请跟我联系。(The program of Bacterial Colony Chemotaxis algorithm ,I cant find anyone online,so I program it myself, please contact me f there are any bugs.)

一个用matlab编写的绘制smith圆图的程序，简单明了，内有代码解释(One using matlab draw smith chart of the procedure is simple, there are code explanations)

integral and differensial in MATLAB

说明：  计算方法数值方程，用列主元Gauss消去法解释线性方程组Ax=b，其中A=[10E-8 2 3,-1 3.712 4.623,-2 1.072 5.643],b=[1,2,3](Calculated value equation, the main-element Gauss elimination explanation of linear equations Ax = b, where A = [10E-8 2 3,-1 3.712 4.623,-2 1.072 5.643], b = [1,2,3 ])

说明：  平均周期图法和平滑平均周期图法估计功率谱 从经典功率谱估计周期图法原理入手，从理论上分析了其存在的局限性，借助Welch算法对其进行修正。依靠Matlab强大的数值分析和信号处理能力进行实验!! 用周期图法和welch法分别估计了一下信号的功率谱密度。采样频率200Hz，时间序列长度2048，FFT数据点数2048。其中welch法使用hanning窗，窗口长度600．(Average periodogram and periodogram smoothing method to estimate the average power spectrum from the classical power spectrum estimation periodogram principle starting from the theoretical analysis of the limitations of its existence, with the Welch algorithm, amending them. Rely on the powerful Matlab numerical analysis and signal processing capabilities to experiment!! With periodogram and welch method were estimated signal power spectral density about. Sampling frequency of 200Hz, the time sequence length 2048, FFT data points 2048. Welch method which uses hanning window, the window length of 600.)

利用FDTD方法计算简单目标（如：方柱）的RCS，通过迭代求解，近远场外推，得到远区场的结果 (Using the FDTD method to calculate the RCS of simple objects(such as square column), through iterative solution, Near far field extrapolation to get the results of far field)