matlab

this code gives various types of filter designs like chebbyshev and butterworth filters

说明：  计算卫星坐标程序！根据广播星历的17个参数，而计算！(Calculate satellite coordinates program! According to the 17 broadcast ephemeris parameters, the calculation!)

无约束优化程序解决数值优化问题。在优化算法中有重要作用。(Optimization procedures for solving numerical optimization problems. In the optimization algorithm has an important role.)

说明：  matlab基础教学系列6，一步步送入熟练(the door to matlab)

流形学习，局部线性嵌入式算法(LLE)，一种智能的算法去推测捕捉高维空间中所包含的低维特征。与适合于局部维数约减的聚类算法不同，LLE算法在单一的低维的全域坐标系统中表征采样空间，然而它并没有优化最小局域。通过对线性重构的局域对称的研究应用，LLE能够描述非线性流形的全局结构，例如那些人脸的数据集或者文本文档集(Manifold learning, embedded local linear algorithm (LLE), an intelligent algorithm to predict capture high-dimensional space contained in the low-dimensional features. And for local dimensionality reduction of the different clustering algorithms, LLE algorithm in a single low-dimensional characterization of the global coordinate system, the sampling space, but it does not optimize the local minimum. Reconstructed by the local symmetry of the linear study of the application, LLE can describe the global structure of nonlinear manifolds, such as those who face data sets or text document collection)

矩形序贯，是传统序贯法的一种变异，可以处理一些特殊的多普勒回波(Rectangular sequential, is a variation of the traditional sequential method that can handle some special Doppler echo)

用MATLAB语言的GUI设计一个时钟，可以播放或停止。(A timer by MATLAB.)

拟牛顿法和最速下降法(Steepest Descent Methods)一样只要求每一步迭代时知道目标函数的梯度。通过测量梯度的变化，构造一个目标函数的模型使之足以产生超线性收敛性。这类方法大大优于最速下降法，尤其对于困难的问题。另外，因为拟牛顿法不需要二阶导数的信息，所以有时比牛顿法(Newton s Method)更为有效。如今，优化软件中包含了大量的拟牛顿算法用来解决无约束，约束，和大规模的优化问题。(The quasi-Newton method and the Steepest Descent Methods only require that each step iterations know the gradient of the objective function. By measuring the change of the gradient, constructing a model of the objective function is sufficient to produce superlinear convergence. This method is much better than the steepest descent method, especially for difficult problems. In addition, because the quasi-Newton method does not require information on the second derivative, it is sometimes more effective than the Newton s Method. Today, the optimization software contains a large number of quasi-Newton algorithm used to solve the unconstrained, constraint, and large-scale optimization problems.)

这是一个车辆仿真模型，总共6个自由度，车身两个，车轮四个(This is a vehicle simulation model, with a total of 6 degrees of freedom, two bodies and four wheels.)

离散PID控制器的MATLAB/simulink仿真。(MATLAB/simulink simulation of discrete PID controller.)