TDPC 编码器

余弦波是渐变的，当ωt+φ的取值变化量很小时，Y的变化量也是很微小的。余弦波的这一特性保证了嵌入水印后相邻字符灰度值差别不大，人眼无法识别，从而保证了水印的不可见性和图像质量。(Cosine wave is gradual, and when ωt+ φ values variation is very small, Y amount of change is very small. Cosine waves This feature ensures that watermarked gray value of adjacent character is not very different, the human eye does not recognize, thus ensuring the invisibility of watermark and image quality.)

给出了如何使用伪逆滤波器的matlab代码(give a matlab code of pseudo-inverse filter)

一个关于语音信号处理中的语音识别程序，比较完整，仅供参考。(A speech signal processing, speech recognition program, complete, for reference only.)

DS-CDMA通信系统中的空时移动信道估计，原文发表在IEE PROCEEDING OF COMMUNICATION上(DS-CDMA system of space-time mobile channel estimation, Original published in the IEE, 0c OF COMMUNICATION)

MATLAB code to calculate eigen engenry and eigen function of a square potential well.

this source code is very well

运用FFT技术来综合和分析电话拨号的过程，matlab来分解了这一过程，希望能提供帮助( TOUCHTONE Use FFT to synthesize and analyze telephone dialing The dual tone multi-frequency (DTMF) standard specifies that the tone generated by a button on a telephone key pad is the sum of two sinusoids, with frequencies determined by the button s row and column. The dial pad on the upper left allows you to select buttons and generate the corresponding tones. The signal plotted on the upper right is a recording of the FAX number for the MathWorks being dialed. You can replay the entire signal, or select individual segments. The power plot is the magnitude of the FFT of the signal being played. What is the MathWorks FAX number?)

应用背景思维进化算法是一种差分的进化算法，该算法优化效果好，较遗传算法有很多优点，应用较广泛，泛华能力强，有研究的同学可以看看。            关键技术思维进化算法采用与遗传算法相类似的种群概念，经过不断的迭代产生最优个体，对该个体进行解码得到最优的参数，

this is to find the information of any image database

输入经度、纬度和高度，计算任意近地面的重力场(Enter the longitude, latitude and altitude, calculation of arbitrary gravitational field near the ground)