Dirty_or_TH_precoding

此m文件时实现MATLAB实现函数，Gabor滤波器的傅里叶变换为谐波和高斯函数各自傅里叶变换的卷积。 (Gabor transform！)

此压缩包为图像识别中sift算法demo，以MATLAB为开发平台。(This archive sift algorithm for image recognition demo, for the development platform in MATLAB.)

说明：  月球软着陆仿真：在停泊轨道上，探测器在脉冲制动的作用下，经霍曼变轨，下降到距月面大约 15 公里的近月点，该近月点就是主制动段的初始制动点。主制动段以下是障碍检测与规避和最终着陆段。在主制动段，由于探测器的初始速度很大(1.692km/s)，所以主制动段制导律设计的主要目的就是高效抵消此速度，将探测器导引到期望的末端状态(Lunar soft landing simulation: in the parking orbit, the probe under the action of pulse braking, through the hohmann change of orbit, to descend to about 15 kilometers from the surface of the moon, the near-moon point is the main braking section of the initial braking point. Following is the main braking section for obstacle detection and avoidance and the final landing section. In the main braking section, since the initial velocity of the detector is very large (1.692km/s), the main purpose of the guidance law design of the main braking section is to effectively offset this velocity and guide the detector to the desired terminal state)

Rosenbrock函数优化属于无约束函数优化问题，其全局极小值位于一条平滑而狭长的抛物线形状的山谷底部，且为优化算法提供的信息很少，因此找到其全局极小值就显得很困难。根据Rosenbrock函数的这种特性，专门提出了一种改进的PSO算法，该算法引入三角函数因子，利用三角函数具有的周期振荡性，使每个粒子获得较强的振荡性，扩大每个粒子的搜索空间，引导粒子向全局极小值附近靠近，避免算法过早地收敛，陷入局部最优，从而找到Rosenbrock函数的全局极小值。大量实验结果表明，该算法具有很好的优化性能，为某些领域某些特定的类似于Rosenbrock函数的优化问题提供了一种新的思路。(Rosenbrock function optimization functions are unconstrained optimization problems, its global minimum value at a smooth parabolic shape and narrow mountain valley Department, and for the optimization algorithm provides little information, and therefore find its global minimum value becomes very difficult. According to this feature Rosenbrock function, specifically mentioning Out an improved PSO algorithm (PSO-R), the algorithm introduced trigonometric factor, using trigonometric has periodic oscillations, so that each particle to obtain more Strong oscillations of expanding the search space of each particle, the particle is close to nearby guide global minimum, avoiding premature convergence algorithm, into a local optimum, thus Finding the global minimum Rosenbrock function. Experimental results show that the algorithm has a good optimizing performance, similar to some certain areas Rosenbrock function in the optimization problem provides a new way of thinking.)

用Matlabb编写的Radon变换检测直线程序,效果不错，十分明显，大家可以看看(Written by Matlabb Radon transform line detection program, the effect is good, very clear, we can see)

绘制石墨烯结构，石墨烯为单层石墨结构，因其在性能上的优越性，引起了广泛的关注(graphene)

Steady-State Analysis of a Linear Circuit This demonstration illustrates use of the Powergui and Impedance Measurement blocks to analyze the steady-state operation of a linear electrical circuit

surf算法对导入的图像在视频里做匹配，方框标记出来, 清晰易懂(use SURF detector to match object of interest )

matlab的基本应用，和基础知识，ppt形式的讲解。(matlab basic applications, and basic knowledge, ppt form of explanation.)

it is a matlab program used to calculate the FAST FOURIER TRANSFORMS of two given sequences