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基于MATLAB巴特沃思滤波器的研究，与仿真 (Butterworth filter based on MATLAB research, and simulation)

sobel算子 源代码，能完成图像边缘检测 (sobel operator )

核主分量计算得也很有用的程序~已经调通很好用~(KPCA，which is very useful in signal processing!)

EMD经验模式分解工具箱，EMD经验模式分解工具箱，EMD经验模式分解工具箱。(emd Toolbox)

本工具箱详细地说明了matlab的各种算法实现，方便大家学习matlab的基本应用，进一步加深了对matlab的认识。(The toolkit explains in detail the various algorithms matlab, matlab facilitate them to learn the basic application, and further deepen the understanding of matlab.)

说明：  著名的seismiclab的代码 是地震学研究人员必备的工具(famous seismiclab code seismic study is an essential tool for officers)

说明：  Mann Kendall检验 MATLAB(Mann Kendall test MATLAB)

帝王蝶优化算法,一种新的元启发式优化算法！(In nature, the eastern North American monarch population is known for its southward migration during the late summer/autumn the northern United States and southern Canada to Mexico, covering thousands of miles. By simplifying and idealizing the migration of monarch butterflies, a new kind of nature-inspired metaheuristic algorithm, called Monarch Butterfly Optimization (MBO), a first of its kind, is proposed in this paper. In MBO, all the monarch butterfly individuals are located in two distinct lands viz. Southern Canada & northern United States (Land 1) and Mexico (Land 2). Accordingly, the positions of the monarch butterflies are updated in two ways. Firstly, the offsprings are generated (position updating) by migration operator, which can be adjusted by the migration ratio. It is followed by tuning the positions for other butterflies by means of butterfly adjusting operator. In order to keep the population unchanged and minimize fitness uations, the sum of the newly-generated but)

灰色关联度分析，只需要直接输入数据即可用(grey relational analysis)

fit_ellipse - finds the best fit to an ellipse for the given set of points.(fit_ellipse- finds the best fit to an ellipse for the given set of points.)