fengyai

MATLAB and Octave Functions for Computer Vision and Image Processing.

计算分形维数()

中马尔可夫的经典例子 看了这个就会懂了 (markov)

opencv的canny函数检测边缘的效果和matlab的不同 matlab的边缘更为细腻 (opencv canny edge effect and matlab function testing different- the edges of the matlab is more exquisite )

按照KC Ho 的一篇论文Source Localization Using TDOA and FDOA Measurements in the Presence of Receiver Location Errors_ Analysis and Solution写的仿真代码，用于3基站以上对固定目标进行定位，方法是两步最小二乘，实际上第二步完全不能用，不知道是不是自己写的有问题，欢迎讨论~(According to the paper "Source Localization Using TDOA and FDOA Measurements in the Presence of Receiver Location Errors_ Analysis and Solution" written by KC Ho, I write the code for simulation, the method is the least square, in fact, the second step is completely out of use, I do not know whether it is my problem or not, if you have any idea, welcome to discuss)

完整的c版本关于实现马尔科夫链，预测模型的构造(c source code about marcofu)

利用MATLAB对负指数序列进行作图，绘制出实部与虚部波形(MATLAB plotting the negative exponential sequence, to map out the real and imaginary part of the waveform.)

Performs basic arithmetic while returning the fractional answer.

梯度下降法是最早最简单，也是最为常用的最优化方法。梯度下降法实现简单，当目标函数是凸函数时，梯度下降法的解是全局解。一般情况下，其解不保证是全局最优解，梯度下降法的速度也未必是最快的。梯度下降法的优化思想是用当前位置负梯度方向作为搜索方向，因为该方向为当前位置的最快下降方向，所以也被称为是”最速下降法“。最速下降法越接近目标值，步长越小，前进越慢。(The gradient descent method is the earliest and most simple and most commonly used optimization method. The gradient descent method is simple to realize. When the objective function is a convex function, the solution of the gradient descent method is a global solution. In general, the solution is not guaranteed to be the global optimal solution, and the gradient descent method is not necessarily the fastest. The optimization idea of gradient descent method is to use the current position negative gradient direction as the search direction, because the direction is the fastest descending direction of the current position, so it is also called the steepest descent method. The faster the slowest descent approach is closer to the target, the smaller the step, the slower the progress.)

高阶谱或高阶统计量的方法估计谐波信号的参数,获取有色高斯噪声的谐波获取 (Higher-order spectrum, or higher-order statistics to estimate the parameters of harmonic signals, access to colored Gaussian noise to obtain the harmonic)