整理好的蚁群算法完整程序

Apply a function handle FUN to a three-dimensional image X in a blockbased manner (3-D blocks).

PCA(Principal Component Analysis)预处理和最近邻分类程序(the code of Principal Component Analysis)

本段代码用来进行肺实质的粗提取，为病灶提取做准备。首先对原始dcm图片进行预处理，随后使用大津法对图像进行阈值分割，得到二值图，随后，使用较为简单的小面积法删除背景区域，取反进行掩模，最后通过掩模与原图像的运算，将肺实质完整的提取出来。

the comb pilot aided channel estimation in ofdm modulation is considered. the power of pilot subchannels is under the control. The data experience frequency selective channel then the AWGN noise is added to make the situation worse. The bit error rate is ploted versus SNR.

QAM16在非线性功放模型TWTA的仿真，对需要认识功放特性的同学有帮助。(TWTA nonlinear amplifier model QAM16 the simulation, students need to realize that help power amplifier characteristics.)

国外网站上找到的一个图像拼接程序，将三张图片拼接为一张。 大致方法为Haaris找角点，粗匹配，RANSAC精匹配。 有详细的注释，附带一篇代码说明文档，非常适合初学者学习研究(Foreign web sites to find a image stitching procedure, three picture mosaic as one. Roughly method for Haaris to find a corner, coarse matching, the RANSAC precise matching. Detailed notes, with a code documentation, very suitable for beginners to learn)

用matlab 实现离散时间傅里叶变换的例程，方便初接触者使用。这是我dsp课的大作业(Using matlab discrete-time Fourier transform routines to facilitate early contact to use. This is my big job dsp lesson)

点云切片算法，海量点云中切片及其算法，速度快，精度高，非常棒(Point cloud slicing algorithm, massive cloud point slice and its algorithm, fast, high precision, great)

说明：  用Matlab实现的隐蔽马尔可夫模型（Hidden Markov Model:HMM)(Hidden Markov Model(HMM) with matlab)

光子晶体的能带图计算，其实质就是电磁本征值（复矢量场）的问题。利用平面波展开磁场，引入f(r)=1/eps(r)，再利用倒格矢G将f(r)展开，将两者代入光子晶体的支配方程，最后得到一个平面波展开的方法的线性方程组，最终转化为求解其特征值向量的问题。(Energy band diagram of the photonic crystal, its essence is the electromagnetic eigenvalues ​ ​ (complex vector field).The linear plane wave expansion magnetic field, the introduction of f (r) = 1/eps (r), re-use reciprocal lattice vector G will expand f (r), the two substituted into the governing equations of the photonic crystal, and finally get a plane wave expansionequations, and ultimately into solving the problem of its eigenvalues​ ​ .)