2D_PIC

离散单元法及其在EDEM上的实践。包含这种实例，可以很好的帮助学习EDEM。(DISCRETE ELEMENT METHOD AND ITS PRACTICE ON EDEM.Including this example can be a good help in learning EDEM.)

tc下图形编程精彩的演示程序源代码-tc under graphical programming wonderful demonstration program source code

基于51单片机设计的PS2键盘，是作为从机，通过PS2接口连接到电脑，程序包括开机自检，发送键值和矩阵扫描。经测试完全可用注意要在开机之前把键盘接上电脑接口，让电脑BIOS自检的时候对键盘进行设置，才能成功读取键盘的内容。

八皇后问题八皇后问题-8 8 Queens

ARM7 S3C44b0x读写硬盘的程序和说明文档，可值得参考借鉴。(ARM7 S3C44b0x hard disk read and write procedures and documentation, reference should learn from.)

STm8低功耗测试,目前测试效果良好，有需要的小伙伴可以下载参考下(STm8 low power test, the current test results are good, small partners in need can download the reference)

应用背景MP3播放器开发源码及电路图,使用AT89C51SNDIC-R0开发，有原理图和源代码，这款MP3播放器以at89c51snd1c为核心，以硬盘为存储介质，液晶屏为双行显示，每行显示7.5个汉字，这块液晶屏以ST7920作为主控制器，内部集成8129个汉字，液晶屏在这个播放器中用来显示歌曲名称以及一些播放状态。关键技术1)MCS51内核，可以利用单片及开发软件Keil软件方便开发mp3播放器，无需特殊软件平台；     2)MPEG I/II-Layer 3 hardware decoder       .独立MP3 Decoder      .支持48,44.1,32,24,22.05,16khz取样频率      .支持软件31阶音量控制,高中低音均衡控制      .重低音效果     3)集成DAC部件，支持PCM,IIS格式；     4)64K字节片上代码存储空间（100K次擦写寿命）     5)4K字节boot flash memory,USB/UART下载代码     6)集成USB1.1 device部件     7)MMC卡接口     8)IDE/ATAPI接口（HDD/CD-ROM Interface)     9)2通道ADC,8Khz取样     .......................    关于该芯片的具体信息，可以访问www.atmel.com获取at89c51snd1c的datasheet.    这款MP3播放器以at89c51snd1c为核心，以

Background Given a set of rectangles {R1, R2, …, Rn}, compute the area of their common intersection. i.e., Area(R1∩R2∩…∩Rn) The edges of the rectangles R1, R2, …, Rn, are either vertical or horizontal lines. For example, the intersection of 4 rectangles, R1, R2, R3, and R4, in the following figure is the shaded rectangle. Input The input contains (N + 1) lines. The first line specifies the number of rectangles N, where 1 < N < 1000. Since the sides of the rectangles are parallel to the x-axis and y-axis, each rectangle is bounded by the lines x = x1, x = x2, y = y1 and y = y2 and each subsequent line of the input file thus specifies one rectangle in the following format: x1 x2 y1 y2 such that 0 <= x1 < x2 <= 10000 and 0 <= y1 < y2 <= 10000, and x1, x2, y1 and y2 are integers. Output The output file contains the area of the intersection of all the rectangles.

数学模型忆阻器的仿真，直观分析忆阻器的各种特性。(Math model memristor simulation)

说明：  组件来制作，通过CSS3来对它进行美化，效果美观大方。(Components to produce, through CSS3 to beautify it, beautiful and generous effect.)