Tech Specs

文件预览，在java项目中实现word、ppt、excel、txt等文件的在线预览(File preview, in the Java project to achieve word, PPT, Excel, txt and other documents online preview)

4）读取音乐信号romanza_pe.wav, 截取其前10s信号，选择适当的窗口类型和窗口宽度，显示其短时傅立叶频谱，以便能更清晰地看清谱线。说明信号频谱特点。 5）令D=5下采样音乐信号，播放其声音并显示其短时傅立叶频谱。描述并解释你所听到的声音和观察到的频谱之间的关系() Read the music signal romanza_pe.wav, intercept its first 10 s signal, select the appropriate window type and window width, display its short-time Fourier spectrum, so as to be able to see the spectrum lines more clearly. The characteristics of signal spectrum are explained. 5) let D=5 sample the music signal, play its voice and display its short-time Fu Liye spectrum. Describe and explain the relationship between the voice you hear and the observed spectrum.)

StarFire5SV_UM_V1.26的功能介绍-StarFire5SV_UM_V1.26 introduced the function

五笔字根图，从万能五笔中找出来的 ,对初学五笔有很大帮助。-five Roots chart, find the omnipotent five out of five when a great help.

一款将十六进制串进行摘要（包括md5和sha-1），非常好用。-A string of hexadecimal for summary (including md5 and sha-1), very handy.

说明：  设计一个8位的简易频率计，测出信号的频率，即1s内变化的次数。(An 8-bit simple frequency meter is designed to measure the frequency of the signal, i.e. the number of changes in one second.)

说明：  基于tsai的相机标定方法,可以放心下载(Camera calibration method based on Tsai can be downloaded safely)

主要是利用r语言做简单线性回归，一元线性回归(use r language to solve simple ols)

matlab仿真精华50例中附有pdf文档能详细理解仿真流程，并附详细源代码，主要仿真对象是针对异步电机和直流电机的仿真过程。(Matlab simulation essence, 50 cases with PDF documents, a detailed understanding of the simulation process, and with detailed source code, the main simulation object is for asynchronous motors and DC motor simulation process.)

VC++ 源码编译实现的计时器小程序，比较简易的计时器，比秒要再快一些，不过这个时间频率是可以调的，如图所示，点击开始计时功能，计时器就开始工作了，可看到数字在不停的增大。(Timer applets VC++ source compiler implementation, relatively simple timer than seconds again faster, but this time frequency can be adjusted, as shown, click the start timing function the timer began working, can be see the numbers kept increasing.)