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说明：  Dynamic sliding mode control of a four-wheel skid-steering vehicle in presence of sliding

说明：  两种对二阶系统进行参数辨识的最小二乘算法，一种可以直接得到输入输出之间的传递函数，一种可以解出线性的差分方程各系数，再反解得到传递函数。附带的一个二阶系统的模型，可以自行下载导入输入输出数据进行试验。(Two kinds of least square algorithm for parameter identification of second-order system, one can directly get the transfer function between input and output, the other can solve the coefficients of linear difference equation, and then get the transfer function by inverse solution. The attached model of a second-order system can download the input and output data for test.)

LFM信号的分数傅里叶变换分析，包含LFM信号分数阶谱图产生及FrFt子程序，及峰值搜索。非常好用。(LFM signal' s fractional Fourier transform, including the LFM signal generation and FrFt fractional spectrum of subroutines, and peak search. Very easy to use.)

基于有限域的qc-ldpc码校验矩阵构造方法(conctruction method of QC-LDPC code based on finite field)

说明：  实现二维路径规划,包含遗传算法,rrt算法，a星(Realize two-dimensional path planning)

image affine transformation using linear an nonlinear methods

说明：  有限单元法，彭细荣，包含matlab源代码，可以通过其运行，学习。(matlab data source about finite element method。 )

仿真实现接收信号并进行数字下变频处理，并进行了滤波，实现了降采样率的处理过程(The received signal is simulated and processed by digital down-conversion, and filtered. The process of reducing sampling rate is realized.)

杨启帆数学建模案例集，包括各种数学建模算法的实例，解法和解决方案，有例子，有解析(Qi-Fan Yang case sets of mathematical modeling, including mathematical modeling algorithm examples, solutions and solutions with examples, there are analytical)

RII:Transform lowpass filters to highpass