xiashiditui

说明：  设计巴特沃斯型、椭圆、切比雪夫数字低通滤波器，并对加入噪声的图像进行滤波(design Buttetworth、cheby1 and ellip LF,and use these filters in image processing.)

等参单元，用于弹性力学分析，数值积分法等(Isoparametric element，For elastic mechanics analysis, numerical integration method, etc.)

matlab瑞利衰落信道仿真，配WORD说明(matlab Rayleigh fading channel simulation)

The NAVSTAR GPS (NAVigation Satelllite Timing And Ranging Global Positioning System) is an all-weather, space-based navigation system developed by the U.S. Department of Defense to determine ones position, velocity, and time accurately in a common reference system on the Earth. The present constellation consists of nominally 24 satellites and provides global coverage with four to eight satellites simultaneously observed above 15 ? elevation.

在无标度的网络中，按节点度的大小从大到小的顺序进行攻击(In scale-free network, according to the size of the node degrees big to small order)

SIMOOFDM系统的基于子空间的盲信道估计算法(SIMOOFDM system subspace-based blind channel estimation algorithm)

matlab gui 界面的人脸的采集，通过点击人眼中心，实现识别(matlab gui interface face acquisition, by clicking on the eye center, to achieve recognition)

Dlms测试程序,用于召测DLMS电表数据的一个小程序(Dlms Test)

啁啾光纤光栅的反射谱、时延的matlab仿真图像(Matlab simulation image of reflection spectrum and time delay of chirped fiber grating)

提出了一种求解电磁场有限元 边界元混合法所生成的线性方程组的有效方法 ———内观 法结合多波前法.由于该线性方程组的系数是一个部分稀疏部分满填充的矩阵,为了加速求解,应用内观法将系数矩阵分为 2块,一块是有限元法形成的稀疏矩阵,另一块是边界元法生成的满阵,然后用多波前法求解稀疏矩阵方程,用高斯 约当消去法解满阵方程. 采用该方法,计算了二维多层介质柱体的雷达散射截面.计算结果表明,该方法的计算效率远远高于传统的高斯法.(Proposed for solving mixed finite element boundary element linear equations generated by an effective method of Vipassana--- a combination of multi wave front method. Since the coefficients of linear equations is a part of the sparsely populated part of the full matrix, in order to speed up the solution, application of Vipassana coefficient matrix is ​ ​ divided into two, one is the finite element method for the formation of the sparse matrix, the other is the boundary element method generates the full array, and then use the multifrontal method for solving sparse matrix equation Gauss Jordan elimination method with full matrix equation solution. use this method to calculate the two-dimensional multi-layer dielectric cylinder of the radar cross section. The results show the computational efficiency of this method is much higher than the traditional Gaussian law.)