psnr

交流电机前馈控制的matlab仿真实验，使用的控制器是PID控制器(AC motor feedforward control matlab simulation, PID controller using the controller is)

共振解调法诊断轴承损伤类故障的原理概述如下:当轴承某一元件表面出现局部损伤时，在受载运行过程中要撞击与之相互作用的其它元件表面，产生冲击脉冲力，由于冲击脉冲力的频带很宽，必然包含轴承外圈、传感器甚至附加的谐振器等的固有频率而激起这个测振系统的高频固有振动。根据实际情况可以选择某一高频固有振动作为研究对象，通过中心频率等于该固有频率的带通滤波器把该固有振动分离出来。然后进行包络解调，去除高频衰减振动的频率成分，得到只包含故障特征信息的低频包络信号，对这一包络信号进行频谱分析便可以容易地诊断出轴承的故障来。(The principle of resonance demodulation method in the diagnosis of bearing damage such failure overview is as follows: when the bearing surface of a local damage, in the process of loading operation to hit with other elements of the interaction of surface, impact pulse power, due to the impact pulse frequency band is very wide, inevitably contains the bearing outer ring, sensors and even additional resonator and stir up the natural frequency of the vibration system of the high frequency vibration mode.A high frequency vibration mode can be selected according to actual situation as the research object, through the center frequency is equal to the natural frequency of the bandpass filter to separate the natural vibration.Then envelope demodulation, frequency components to remove the high frequency vibration attenuation, get only includes fault feature information of low frequency envelope signal, the envelope signal spectrum analysis can be easily diagnosed bearing failure.)

假定运行区域内的发电机的开路特性的V型曲线；(Assuming the operation area of generator breaker characteristics of v-shaped curve,)

说明：  给大家上传一些matlab的程序，喜欢的来(For everyone to upload some matlab procedures, like to)

This tutorial describes the use of Artificial Neural Networks in Matlab.

源码给出了非线性规划（NLP）的梯度法，其中gradf.m为梯度法算法，下载设置参数既能运行。(Given nonlinear programming source (NLP) in the gradient method, which gradf.m as gradient algorithm, download the set parameters not only run.)

this is the simulink block diagram for the DSB-SC "double side band suppress carrier"

In cryptography, SHA-1 is a cryptographic hash function designed by the United States National Security Agency and published by the United States NIST as a U.S. Federal Information Processing Standard. SHA stands for "secure hash algorithm".

我们卫星定位导航课中导航中双历元GNSS辅助SINS动态初始对准方法的m文件，只要有测量数据应该就可以实现，大家可以参考一下(Our lesson navigation satellite positioning and navigation double epoch dynamic GNSS assistance SINS initial alignment method m file, as long as the measurement data should be able to achieve, we can refer to)

多星座导航系统中利用最小二乘算法进行位置解算的MATLAB傆代码，以GPS/GLONASS系统为例(Multi-constellation navigation system using least square algorithm solver of MATLAB Yuan location code to GPS/GLONASS system as an example)