SIRP

计算二维光子晶体的带隙和能带面，适合comsol3.5版本(Calculation of band gap and band surface of photonic crystal)

image processing it will process the image

题目：有1、2、3、4个数字，能组成多少个互不相同且无重复数字的三位数？都是多少？ 1.程序分析：可填在百位、十位、个位的数字都是1、2、3、4。组成所有的排列后再去 　　　　　　掉不满足条件的排列。 (Title: There are numbers 1,2,3,4, how many can be composed of distinct three-digit numbers without repetition? Is how much? 1. Program Analysis: fill in the hundred, ten, a bit of the numbers are 1,2,3,4. Composed of all the permutations and then remove the arrangement does not meet the conditions.)

说明：  DOA中的经典，music算法，还有说明，亲测很好用，分享给大家(music DOA in the classic, music algorithm, there are instructions, pro test is very easy to use, share with you)

串的一些基本运算，删除一段子串，置换，求s串中从start位置开始长度为len的子串等等(Some of the basic string operations, delete a substring, replacement, seeking s string starting from the start position of the sub-string of length len, etc.)

用MATLAB软件实现对空时编码的仿真(程序 +仿真图)(Space-time coding simulation using MATLAB software)

apcluster是发表在今年2007年Science上的一篇论文的代码实现,一种新的有效的聚类算法,(apcluster is published in Science this year, in 2007 a paper on the code, a new effective cluster algorithm,)

说明：  matlab常用程序,判断连续，求导，求极限，求切线与法线，泰勒展开(matlab common procedures)

图像小波去噪程序，帮助处理模糊的图像文件，出去噪声，提高分辨率。(Wavelet denoising procedure to help deal with the blurred image files, out of the noise and improve resolution.)

哈夫曼码编码用MATLAB实现，此法经过检验效果非常好。(Huffman coding using MATLAB implementation, this method is proven very successful.)