111 (2)

利用optisystem软件仿真半导体激光器的P-I特性曲线。得到的图形遵循在超过阈值电流之后，输出光功率与电流成线性关系规律。(Using software optisystem simulation P- I characteristics of semiconductor laser curve.The graphics follow after more than threshold current, a linear relationship with the output light power and current laws.)

1、典型连续时间信号波形绘制 1）单边指数信号 要求： (1) 画出t=0,1,2,…,500共501点 (2)在一个坐标系中用三种不同颜色分别绘制如下三种情况下的波形 (a) E=200,X=62.5 (b) E=200,X=125.0 (c) E=200,X=250.0 (3)标出特殊点的坐标，如t=0和 的坐标 代码为此题目的解 ()

滑模变结构控制的matlab仿真模型,非常全面的Simulink程序仿真案例.(sliding mode variable structure control)

code for sattelite calculaton

DE差分进化优化算法的源代码，从外文网站下载(DE optimization toolbox from the web.)

找到一个矩阵里的最小值,因而找到最小值很容易的(find a min number in a matrix,so you can get it essay)

共轭梯度法（Conjugate Gradient）是介于最速下降法与牛顿法之间的一个方法，它仅需利用一阶导数信息，但克服了最速下降法收敛慢的缺点，又避免了牛顿法需要存储和计算Hesse矩阵并求逆的缺点，共轭梯度法不仅是解决大型线性方程组最有用的方法之一，也是解大型非线性最优化最有效的算法之一。 在各种优化算法中，共轭梯度法是非常重要的一种。其优点是所需存储量小，具有步收敛性，稳定性高，而且不需要任何外来参数(Conjugate Gradient method (Conjugate Gradient) is between the steepest descent method between Newton method and a method, it only USES a derivative information, but overcome the steepest descent method slow convergence of weakness, but also avoid the Newton law needs to storage and computing Hesse inverse matrix and shortcomings, Conjugate Gradient method is not only solve linear equations with most of the large method, and also one of the most effective solution large nonlinear optimization of one of the algorithm. In all kinds of optimization algorithm, the conjugate gradient method is very important. Its advantage is the storage capacity needed, it has small step convergence, high stability, and doesn t require any exotic parameters numerical experiment, this is the modern scientific computing of the answer above problem sets)

在matlab/simulink中建立无刷直流电机的模型，在模型的基础上采用三闭环控制实现无刷直流电机的位置精确控制(In matlab/simulink establish in brushless dc motor model, based on the model using the three closed-loop control achieve brushless dc motor position accurate control )

双向放大转发中继选择方案,提出3种不同的中继选择方案以及信道生成函数,最大化系统容量。(In two-way AF relay networks，we propose three relay selection strategies to maximize the system throughput )

海伦型积分方程，用于矩量法求线电流，如偶极子天线(Helen-type integral equation for the moment method for the line current, such as the dipole antenna)