SURFmex

模仿微信打飞机 的Demo 无bug 希望大家一起学习

针对信号自适应chirplet分解未知参数多、实现起来比较困难的特点，文献[1]提出了一种新的chirplet分解快速算法。该算法利用计算信号的二次相位函数，得到其能量分布集中于于信号的调频率曲线上的结论，此时通过谱峰检测可同时获得chirplet调频率、时间中心和幅度的估计；然后通过解线性调频技术获得其初始频率和宽度的估计，仿真结果验证了本文算法的有效性。 (For the signal adaptive the chirplet decomposition of unknown parameters to achieve difficult to literature [1] proposed a new fast algorithm for chirplet decomposition. The algorithm makes use of the secondary phase of the calculated signal function, the conclusion focused on energy distribution curve to tune the frequency of the signal by the peak detection chirplet tune frequency, time center and amplitude estimates then by solving chirp technology to obtain the initial frequency and width is estimated that the simulation results demonstrate the effectiveness of the proposed algorithm.)

LIBSVM使用介绍LIBSVM使用介LIBSVM使用介绍绍LIBSVM使用介绍(LIBSVM use and presentation of LIBSVM use and presentation of the use of IL LIBSVM Shao LIBSVM use and presentation of)

对给定集合A和B，能够编出求A和B的并集C的程序。(For a given set A and B, can be compiled out of order to A and B, and the set of C procedures.)

Arduino-PID-Library-master库函数，可以轻松实现PID控制，是Arduino的函数库。(Arduino-PID-Library-master library function, you can easily realize the PID control is the Arduino library.)

Solution for some problems in Codeforces

基于matlab的小波算法，给出了一个完整的算例，初学者可以很好的学习。(Based on the the matlab wavelet algorithm is given a complete example, beginners can learn well.)

说明：  一个统一的求无约束优化极值函数，方法名由参数传入例如：fmins(无约束方法，一维搜索方法，目标函数，初始点，精度) (A uniform evaluation of unconstrained optimization extremal functions, methods, for example, by an argument: fmins (unconstrained one-dimensional search method, the objective function, the initial point accuracy))

this is a book to learn English TOEIC

脉宽调制（PWM）波形图的仿真模型，用于谐波的分析，可用于逆变器的控制策略研究(Pulse width modulation (PWM) waveform simulation model for harmonic analysis, can be used for inverter control strategy research)