PkgManager

本设计是基于单片设计的一个能实现语音存储和回放功能的系统，利用宏晶公司生产的STC90系列单片机作为主控制器，使用具有录音和放音功能的ISD4004语音芯片，能够显示32个字符的LCD1602显示器件和能对音频进行无失真的放大的TDA2822M差分放大器设计而成的。首先我们利用STC90C516RD+单片机的优越的控制性能来控制ISD4004语音芯片，通过单片机向语音芯片发送指令来完成ISD4004芯片的录音和放功能，用LCD1602来显示单片机对ISD4004的操作状态，使用TDA2822M将ISD4004芯片输出的音频进行无失真的放大的思路来进行语音存储和回放系统设计的，用Circuit Design Suite 10.0(Multisim)软件来绘制该系统的电路，用Keil uVision5软件来编写硬件程序。电路图和程序都完成后使用万用洞洞板依据电路图来焊接实物电路，实物完成后载入芯片程序直接进行实物调试，使用实物调试更容易找出问题和系统设计的缺陷，出现问题时可以通过模块化思想轻松查找到故障原因，并进行修复故障。ISD4004芯片录音时基于多电平存储技术实现的没有传统的数字录音过程中A/D转换带来的量化噪音和变色的金属音色。该系统录取的声音播放出来后和原音的音色、音调保持一致不失真。(This design is based on the single chip design of a voice storage and playback system, using STC90 series MCU produced by Hongjing Company as the main controller, using ISD4004 voice chip with recording and playback function, can display 32 characters LCD 1602 display device and can amplify audio without distortion. TDA2822M differential amplifier is designed. Firstly, we use the superior control performance of STC90C516RD + MCU to control the ISD4004 voice chip, send instructions to the voice chip through MCU to complete the recording and playback function of ISD4004 chip, use LCD1602 to display the operation status of MCU to)

使用matlab平台，求EEG数据的信息熵。。。。。。。。。。。。。。。。。。。。。。。。。。。(Information Entropy of EEG)

说明：  根据传统材料力学势能法来进行数值分析计算健康齿轮时变啮合刚度(Calculating the time varying mesh stiffness of perfect gear based on potential energy method)

一款VB财务表格控件-Financial forms a VB control

Open image format bmp

解决manjaro安装过程由于显卡驱动问题造成的卡死现象， 开机进入bootloader选择nofree，光标移动到Boot,按E，在删除drive=xxx一直到空格的一串，添加代码。(To solve the problem of jamming caused by graphics card driver during the installation of manjaro, Boot into bootloader select no free, move the cursor to Boot, press E, delete drive = XXX until the blank string, add code.)

用html编写的类似大富翁的游戏，包含所有源代码 -Html prepared using similar Monopoly game that contains all the source code

说明：  根据大气折射率判断波导 输入所需参数。 选择要画的图形。 根据所显示的图形判断是否为标准大气(Determination of waveguide based on atmospheric refractive index Input required parameters. Choose the graphics you want to draw. Judging whether it is a standard atmosphere according to the figure displayed.)

说明：  利用该程序可以实现大数据下的三维点云及二维数据的密度聚类，并对聚类后的结果进行准确提取(Using this program, the density clustering of three-dimensional point clouds and two-dimensional data can be realized, and the clustered results can be accurately extracted.)

J2EE配置指南（讲解j2ee开发环境的配置）-J2EE Deployment Guide (J2ME development environment on the configuration)