pll

说明：  实现方程求根！里面包括很多的方程求解！自己下起看看！(Achieve the equation Roots!)

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源程序求解二维导热与对流问题，MATLAB编程，有限体积法(Solving the source of two-dimensional heat conduction and convection, MATLAB programming, finite volume method)

MATLAB工具箱——libsvm-3.17版本，开始学习~(MATLAB Toolbox - libsvm-3.17 version, start learning~)

说明：  调频信号的时-频分析 针对时变信号有很好的效果(When FM signals- frequency analysis for time-varying signal has good results)

给定某一技术指标，按照以上技术指标设计巴特沃斯低通滤波器。(Given a technical indicator, technical indicators in accordance with the above design Butterworth low-pass filter.)

本文利用软件相移技术得到相互正交的参考正弦波信号；通过互相关算法，完成了软正交矢量型LIA相关器的具体实现；利用该方法实现了对微弱信号幅值和相位的检测，有效地抑制干扰，减少了硬件电路成本。通过Matlab仿真，验证了该算法具有一定的优越性。(In this paper, the software technology is orthogonal to the phase shift of the reference sine wave signal through cross-correlation algorithm to complete the implementation of soft orthogonal vector LIA correlator achieved using this method for detecting a weak signal amplitude and phase, effectively suppress the interference and reduce the cost of the hardware circuit. By Matlab simulation show that the algorithm has certain advantages.)

基于matlab编写了SQP法，乘子法，共轭梯度法，拟牛顿法，信赖域法，最速下降法与牛顿法的最新程序，功能很强大，可供编程参考。(Based on the preparation of MATLAB SQP, multiplier method, conjugate gradient method, quasi-Newton method, trust region method, steepest descent method with the Newton-Raphson method the latest procedures, functions very powerful, can be used for programming reference.)

本文利用数学软件MATLAB对Lorenz系统等六个重要的混沌模型进行数值计算，同时模拟出各类混沌系统的独特性质，如混沌吸引子，倍周期，初值敏感性，相图，分岔图等。通过观察和分析上述特性，加深了我们对混沌现象的理解。(In this paper, the mathematical software MATLAB is used to numerically calculate six important chaotic models such as Lorenz system, and simultaneously simulate the unique properties of various chaotic systems, such as chaotic attractors, period of time, initial value sensitivity, phase diagram, bifurcation diagram, etc. . By observing and analyzing the above characteristics, we have deepened our understanding of chaotic phenomena.)

MATLAB code for laplacian pyramid in image processing.