SIFT

求多项式的值y=ployval(p,x)：计算x点处多项式值 有理多项式 有理多项式求导：[q,r]=polyder(a,b)(matlab DESIGN)

Scale Invariant Feature transform ( SIFT)-- this code implements the SIFT algorithm which extracts features invariant to Scale, Rotation and translation from any image.

异步电动机转子断条故障仿真实验的功率谱分析matlab程序，希望对大家有用(Asynchronous motor broken rotor bars simulation of the power spectrum analysis matlab program, I hope useful)

偏微分方程组的求解，使用偏微分代码直接求解。(Solving partial differential equations, using partial differential code directly solved.)

卡尔曼滤波器介绍,适合初学者了解卡尔曼滤波器的原理！(Kalman filter is introduced, suitable for beginners to understand the principle of Kalman Filter!)

用于最大信噪比准则方向图和功率谱，自己编写，仅供参考(Pattern for maximum signal-to-noise ratio criterion and the power spectrum, write your own, for reference only)

Digital signal processing is the discipline that studies the rules governing the behavior of discrete signals, as well as the systems used to process them. It also deals with the issues involved in processing continuous signals using digital techniques. Digital signal processing pervades modern life. It has applications in compact disc players, computer tomography, geological processing, mobile phones, electronic toys, and many others.

classification and regression tree算法的python实现以及相关实验数据(machine learning classification and regression tree)

4阶龙格库塔方法求解常微分方程组，并作出混沌系统的吸引子图像(4-order Runge-Kutta method for solving ordinary differential equations, and make attractor image)

脉冲宽度调制（PWM）是英文“Pulse Width Modulation”的缩写，简称脉宽调制。它是利用微处理器的数字输出来对模拟电路进行控制的一种非常有效的技术，广泛应用于测量，通信，功率控制与变换等许多领域。一种模拟控制方式，根据相应载荷的变化来调制晶体管栅极或基极的偏置，来实现开关稳压电源输出晶 体管或晶体管导通时间的改变，这种方式能使电源的输出电压在工作条件变化时保持恒定。　　脉冲宽 (Pulse width modulation (PWM) is the English " Pulse Width Modulation" acronym, or pulse width modulation. It is the use of the microprocessor to the digital output of analog circuits for the control of a very effective technology, widely used in measurement, communications, power control and many other fields with the transformation. An analog control means, in accordance with the corresponding changes in load modulation transistor gate or base bias, switching power supply to achieve the output transistors or transistor on-time changes in power in this way can the output voltage in the workplace conditions of constant change. Pulse width)