NFHS

The segmentation process itself consists of several subprocesses : rectifying , enveloping , differentiation , tresholding , and segmentation .

Participle Swarm optimization on matlab

matlab解决 TSP问题，已运行，保证可以(tsp ant)

Data Encryption by Matrix Multiplication We will only use numbers 0 to 26 for the encryptive mathematics operation. Numbers from 1 to 26 are for letters from A to Z and 0 is for all non-letter characters. To minimize usage of numbers, all letters are converted to upper case. The original message is converted to number array according to the ASCII table and minus 64. We partition whole array into blocks of 8 numbers. The last block may be added several zeros. Then multiply each block by the an 8x8 matrix A which is invertible in Z27 to get cipher data. The decryption is the same process except to use its inverse matrix B. For good visual reading, we convert all non-letter characters to under score for the decryption.

信号处理技术源代码系列5，版权为原作者所有，使用者与原作者联系。(Signal processing technology source code Series 5, the copyright for the original author of all, the user contact with the original author.)

超实用的matlab函数使用文档说明,有很多哦~,分几个包上传..3(ultra-practical use of Matlab function documents show that there are many-oh, a few hours .. 3 Upload Packet)

移动最小二乘法构造的形函数及形函数偏导图形(moving least square)

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.)

共轭梯度法和Gauss-Seidel迭代法的matlab实现，实例操作，取得了良好的效果(Conjugate gradient method and the Gauss-Seidel iteration method matlab implementation, instance operations, and achieved good results )

Gaussian Pulse function 1