sar_echo

该程序实现灰度图像分段线性变换，Matlab实现(Gray-scale image of the process to achieve sub-linear transformation, Matlab to achieve)

考虑载波的qpsk信号在瑞利信道上的仿真(consider Carrier qpsk Rayleigh channel signal simulation)

有限差分法 微分方程和积分微分方程数值解的方法。基本思想是把连续的定解区域用有限个离散点构成的网格来代替， 这些离散点称作网格的节点；把连续定解区域上的连续变量的函数用在网格上定义的离散变量函数来近似；把原方程和定解条件中的微商用差商来近似， 积分用积分和来近似，于是原微分方程和定解条件就近似地代之以代数方程组，即有限差分方程组 ， 解此方程组就可以得到原问题在离散点上的近似解。然后再利用插值方法便可以从离散解得到定解问题在整个区域上的近似解。 (Finite Difference Method Numerical solution of differential equations and integro-differential equation approach. The basic idea is to set a continuous solution of the region with a finite number of discrete points instead of a grid consisting of, these discrete points called grid nodes the solution of a continuous area on a given function of continuous variables used in the definition of discrete grid variable function approximation the original equation and boundary conditions in the micro-business operators to approximate differential, integral with the points and to approximate, so the original differential equations and boundary conditions are replaced by algebraic equations near Side, that is, finite difference equations , solve this equation group can get the original problem in discrete points on the approximate solution. And then using interpolation methods can be determined from the discrete solution of the problem solution of the approximate solution on the entire region)

简单易懂的双音多频的matlab仿真源代码，采用的算法为葛泽尔算法(The straightforward dual tone multi-frequency simulation matlab source code, using the algorithm for Ge Zeer algorithm)

说明：  通过给定的 船型参数 螺旋桨参数 舵参数计算横向水动力、纵向水动力、首摇力矩，实现PID航向跟踪控制(According to the given hull parameters, propeller parameters and rudder parameters, the lateral hydrodynamic force, longitudinal hydrodynamic force and yaw moment are calculated to realize PID course tracking control)

说明：  莱斯利人口预测模型 莱斯利矩阵为91阶方针表示从0岁到90岁各个年龄段的生育率和存活率集合(leslie )

说明：  c++ 中使用 matlab 简单画图 开发为环境为vs2010(use matlab in c++)

用梯形求积法、自适应Simpson求积（低阶）法和自适应Lobatto求积（高阶）法进行数值积分(With trapezoidal quadrature method, adaptive Simpson quadrature (low) and adaptive Lobatto quadrature (high-order) numerical integration method)

是四层小波分解的图像融合算法 希望对大家的学习有所帮助(Is the four wavelet decomposition of image fusion hope to help the learning)

Minimum Spanning Tree BY ICA