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信号与系统中的LTI线性非时变系统的程式例题，将作业题目写成MATLAB程式进行模拟与判断。(Signals and systems in the LTI LTI system programming examples, job title will be written in MATLAB programming for simulation and judgments.)

说明：  采用BP神经网络算法进行调制样式识别的Matlab代码(Using BP neural network pattern recognition algorithm Matlab code modulation)

preconjgrad：预处理共轭梯度法求线性方程组Ax=b的解 conjgrad：共轭梯度法求线性方程组Ax=b的解 twostep:两部迭代法求线性方程组Ax=b的解 fastdown:快速下降法求线性方程组Ax=b的解(preconjgrad: preconditioned conjugate gradient method for solving linear equations Ax = b solution conjgrad: conjugate gradient method for solving linear equations Ax = b solution twostep: Two iterative methods for solving linear equations Ax = b, Solution fastdown: rapid descent method for solving linear equations Ax = b solution)

应用matlab 调用epanet 软件进行管网水力学计算。(Application to call Matlab epanet software pipe network hydraulic calculation.)

SISI with TWO INPUTS TO SAY WHETHER STUDENT I S GOOD OR NOT

随机粒子群算法，简单高效。非常不错的一个优化算法程序(Stochastic particle swarm algorithm, simple and efficient. An optimization algorithm is very good program)

在matlab中，利用全局阈值对图像进行图像分割，得到有用的区域(Global threshold image in matlab for image segmentation, get useful area)

本人用matlab编写的rels(最小二乘法），rls(递推增广最小二乘法),riv(辅助变量法递推算法)的程序，都是2阶的，稍改动就可以变成其它阶次(I use matlab prepared rels (least squares), rls (augmented recursive least squares method), riv (auxiliary variable method recursive algorithm) procedure, are 2 bands, a little change can be turned into other order)

若系统中有信息不完全或不确知的现象，则称为系统的灰色性。这种具有灰色性的系统，称为灰色系统。(If the system has incomplete information or not sure, then known as the system of the gray. This kind of gray system, known as the Gray system.)

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