ESRI公司ArcInfo的Shape文件格式介绍

采样率小于一个连续时间信号最大频率的2倍时就叫undersampling，欠采样，根据抽样定理，当fs>=2fmax，也就是oversampling，过采样时，数字信号才能重建成原来的模拟信号，欠采样重建会发生混叠-Sampling rate of a continuous-time signal is less than the maximum frequency of 2 times is called undersampling, bandpass sampling, according to sampling theorem, when fs

倒计时程序 可以自己设定倒计时时间，可运用8051单片机实现-Countdown program can set the countdown time to its own

Ubuntu常用命令sudo apt－get insta-Ubuntu used the command sudo apt-get install

程序方便的实现了在程序中连接自己的网页和邮件-procedures to facilitate the realization of the process of linking their website and mail

将bmp图片转换为txt文本显示源程序-will bmp images converted to text display source txt

介绍了zip压缩的原理与实现。对初学者会有所帮助。-File to find the source code.

基于MSP430的DS18B20的温度采集程序-MSP430-based temperature acquisition program DS18B20

MCI虽然调用简单，功能强大，可以满足声音文件处理的基本需要，但是MCI也有它的缺点，那就是它一次只能播放一个WAVE文件，有时在实际应用中，为了实现混音效果，需要同时播放两个或两个以上的WAVE文件时，就需要使用微软DirectX技术中的DirectSound了，该技术直接操作底层声卡设备，可以实现八个以上WAV文件的同时播放。-simple, powerful, voice processing documents to meet the basic needs, but MCI also has its shortcomings, it is only once a player WAVE documents, sometimes in practical application, in order to achieve mixing effects, need to play two or more WAVE documents, it is necessary to use Microsoft"s DirectX technology DirectSound, and the technology underlying direct audio equipment operation can be achieved over eight WAV files at the same time players.

国外最新的关于javascript的ppt讲座-javascript of ppt

Fortran常用算法程序集-徐士良间：第三章所有的源程序，欢迎寻找此书源程序的朋友下载使用　-Fortran algorithm commonly used procedures set- between徐士良: Chapter III of the source of all, welcome to the book to find friends to download the source code to use