新建 DOC 文档

说明：  r四级联动菜单代码是一款四级联动菜单选择器，数据异步获取，动态(R four-tier action menu code is a four-tier action menu selector, data asynchronous acquisition, dynamic)

贪吃蛇游戏，用C#编写的程序。我也是从csdn上面下载来的。(Snake game, written with C# program. I downloaded it from CSDN too.)

json exampole it s example of some json fun

好多计算机方面的研究 与 实现 大家看看吧 -many computers in the study and look at it to realize

本文通过对男性和女性声音的语音特征的研究，发现男女声的基音频率存在较大的差异，并设计了基于基音频率分析的男女声识别系统。男女声识别系统由以下三个模块电路构成：话筒放大器，低通滤波器，半波整流电路，单片机测量控制模块。话筒放大器采用NE5532P音前置芯片，对语音信号进行放大；八阶低通滤波器MAX293完成基音信号的提取；单片机STC12C5410AD实现频率测量和控制输出功能。经仿真与电路实测，男女声的识别效果良好。(In this paper, the voices of male and female voice characteristics of the findings of a study of the fundamental frequency of the sound of men and women there is a big difference, and the design of frequency analysis based on the pitch of the voice recognition system for men and women. Voice Recognition System for men and women from the circuit the following three modules: the microphone amplifier, low-pass filter, half-wave rectifier circuit, single-chip measurement control module. NE5532P sound using the microphone pre-amplifier chip amplification of voice signals eight MAX293-order low-pass filter to complete the extraction of pitch signal STC12C5410AD single-chip realization of the frequency of measurement and control output. By circuit simulation and measurement, the identification of male and female voices well.)

行星式小磨头去除函数的matlab代码，可以按照自己的要求修改磨头参数和工艺参数等。(Planetary small grinding head to remove the function of the matlab code, you can according to their own requirements to modify the grinding head parameters and process parameters)

说明：  android手机端对各类型文件加解密，同时对所用算法进行选择(Encryption of all types of files on Android phone)

说明：  JJG 649-1990 数字称重显示器检定规程(weight indicator test procedure)

GPIO 模拟I2C, 稳定可靠的接口函数(GPIO emulate I2C interface)

说明：  fluent 编写udf 的中文教程，参考编写udf(Fluent writes the udf tutorial in Chinese)