Classification_code

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

数字调制的经典书籍，涵盖各种调制方式，通过本书能对数字调制有个全面的了解(Digital modulation of the classic books, covering a variety of modulation)

DFT进行频谱分析时的三种现象 1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。 采样前加低通滤波器防混叠 2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。 改用其他窗函数（非矩形）改善泄漏。 3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。(DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.)

matlab迭代法代码，很不错，值得看看(iterative method matlab code, very good, worth a look)

tolerence and image acquisition

说明：  psat最新版本的说明书，对先前版本的精简和补充(psat latest version of the specification, the streamlined version of the previous and supplements)

USING OF MATLAB IT CONTAINS SHORTLY

this is used to find the peak count in a signal

用matlab求框架的位移，多自由度发，有限元素(Frame------p73 example2.8 Yijun Liu Introduction to FEM & Frequencies calculation)

森林火灾模拟MATLAB程序，很完整的代码！对火灾模拟感兴趣的可以下载参考参考！互相学习！(Very good！)