CURVE--FITTING

说明：  《Matlab从入门到精通》所有的源程序。(《Matlab from entry to the master》 all of the source.)

当信噪比较大时，采用广义最小二乘法可能会出现多个局部收敛点，解决这个问题的方法可用多级最小二乘法，一般来说多级最小二乘法包含三级辨识过程。利用输入输出数据，通过多级最小二乘法，可分别求的辅助模型，过程模型和噪声模型的参数估计值。在高噪声的情况下，多级最小二乘法明显优于广义最小二乘法，其收敛点唯一。(When the signal noise ratio (SNR), and by use of the generalized least squares method may appear more local convergence point, the way of solving this problem can be used multistage least squares method, and generally multistage least squares method includes three identification process. Using input/output data, through the multistage least squares, respectively for the auxiliary model, process model and noise model parameter estimation. In the high noise, multistage least squares method is obviously superior to the generalized least squares method, and its convergence point only.)

灰色系统知道系统的一些简单信息，但是并没有完全了解该系统，只能根据统计推断或某种逻辑思维来研究该系统。(The gray system know some simple information system, but did not fully understand the system, to study the system can only be based on statistical inference, or some kind of logical thinking.)

在数学建模培训中，降落伞问题很是突出，联系此题对同学有很大的提高，从而程序也很重要。所以发此文件。(Parachute Su snow modeling program title race body)

its an cdma transmiiter which is very easy and simple for beginners.

点云数据读取，以及运用四元素法进行坐标变换。(Point cloud data reading, and the use of four elements for coordinate transformation.)

发射信号为13位巴克码和线性调频混合调制的信号,该雷达具有数字化正交解调、数字脉冲处理、固定目标对消、动目标检测, 和恒虚警（CFAR）处理等功能 (Transmitted signal is 13 Barker code modulation and linear FM signals mixed, the radar has a digital quadrature demodulation, digital pulse processing, fixed target for elimination, moving target detection, and constant false alarm rate (CFAR) processing functions)

本文介绍了一个用MATLAB语言编写的通信仿真教学软件。论述了通信的基础理论和通信仿真教学软件的设计思想以及实现的方法，并谈到了计算机辅助教学的必要性。(This article describes a use of MATLAB language teaching software for communications simulation. Discusses the basic theory of communication and communication simulation teaching software design idea and the realization of the method, and spoke of the need for computer-aided teaching.)

有限元分析的源程序，包括几乎所有的求解算法和程序，直接应用 不需要二次修改。(Finite element analysis of the source code, including almost all of the solution algorithm and procedures, direct applications do not require secondary modifications.)

实现了AIC（主动干扰消除）算法，并仿真了AIC算法的性能(Realized AIC (active interference cancellation) algorithm and simulated performance of the algorithm AIC)