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自己写的一个计算时频分布的程序,可知指定Cohen类分布类型WVD，CWD，PWVD(Himself wrote a calculation procedure for time-frequency distribution shows the distribution of the type specified Cohen category WVD, CWD, PWVD)

说明：  复化simpson公式求二重积分的matlab程序，对于无振荡函数的二重积分效果很好！(Minute of Double Integral formula for the Matlab procedures, without oscillation function for the Double Integral good results!)

MATLAB，传输矩阵法，仿真相移光纤光栅反射谱，可以随意改变相移位置和相移大小(MATLAB，Phase-shifted fiber grating)

在层状光子晶体中，由于折射率不同，能量分布不同，此程序用于模拟此效果(Layered photonic crystals, due to the different refractive index, energy distribution, this procedure is used to simulate the effect of)

The spectrum sensing problem has gained new aspects with cognitive radio and opportunistic spectrum access concepts. It is one of the most challenging issues in cognitive radio systems. In this paper, a survey of spectrum sensing methodologies for cognitive radio is presented. Various aspects of spectrum sensing problem are studied from a cognitive radio perspective and multi-dimensional spectrum sensing concept is introduced. Challenges associated with spectrum sensing are given and enabling spectrum sensing methods are reviewed. The paper explains the cooperative sensing concept and its various forms. External sensing algorithms and other alternative sensing methods are discussed. Furthermore, statistical modeling of network traffic and utilization of these models for prediction of primary user behavior is studied. Finally, sensing features of some current wireless standards are given.

各种实现图像去噪的matlab程序，包括贝叶斯估计去噪，DJ阈值去噪等(A variety of image denoising matlab program, including Bayesian estimation denoising DJ threshold denoising)

matlab vide the examined window into cells (e.g. 16x16 pixels for each cell). For each pixel in a cell, compare the pixel to each of its 8 neighbors (on its left-top, left-middle, left-bottom, right-top, etc.). Follow the pixels along a circle, i.e. clockwise or counter-clockwise. Where the center pixel s value is greater than the neighbor s value, write 1 . Otherwise, write 0 . This gives an 8-digit binary number (which is usually converted to decimal for convenie

说明：  小世界网络路径求法，以及聚集度的求法，开发环境是matlab(small world)

处理信号的时频分析，采用了小波去噪的思想，比较了软阈值，硬阈值及当今各种阈值计算方法。( When processing a signal frequency analysis, Using wavelet denoising thought, Comparison of soft threshold and hard threshold and today various threshold calculation method.)

巴特沃特带阻滤波器的设计，返回分子分母多项式系数，还可以作出增益曲线，以及求出相位响应以及群延时响应(Batewote band stop filter design, the return of molecular denominator polynomial coefficients, can gain curve, and the calculated phase response and group delay response)