编写一个程序，在屏幕上出现一个圆心沿正弦曲线轨迹移动的实心圆，要求每隔4分之一周期，圆的填充色和圆的周边颜色都发生变化（颜色自己选取），同时圆的半径在四分之一周...

离散Fourier变换（简称DFT）为离散信号的分析从理论上提供了变换工具，但由于计算时间较长而难以实现，快速Fourier变换（简称FFT）则是一种减少计算时间的有效算法。本文在对DFT计算量进行分析的基础上指出了FFT的实现途径与计算方法，针对FFT算法进行了程序设计并给出了应用实例。-Discrete Fourier transform (referred to as DFT) analysis for discrete signal theory provides a transform tool, but due to a computational time and difficult to realize, fast Fourier transform (the FFT) is a reduction in the effective algorithm to calculate time. In this paper, DFT calculation was carried out on the basis of the analysis points out the ways and realize the FFT calculation of FFT algorithm for program design and application examples are given.

SIP传说是今年最热门的一个通信协议，了解了解，会有很多收获的-SIP legend was one of the most popular communication protocols, understand understanding, there will be many harvest

探讨了pbl的格式,Pbl有四种块类型，即Header、Free、Node、Data。Header块的前四个字节一定是HDR*，Free块则是FRE*，Node块是NOD*,Data块是DAT*

一个通信的简单文件,请求服务用.........用写字本打开-A simple communication documents, requests for service by writing this open with .........

Delphi编字数统计程序 我们都知道，Word里有“字数统计”的功能，但它的“字数统计”功能有一个缺陷：它会把全角符号都视为汉字处理，结果统计的汉字数总是大于实际的汉字数，针对这个缺陷，本人编写了这个程序，方法如下-series wordage statistical procedures we all know, there are Word "word statistics" function, But its "words Statistics" is a functional defect : it will turn the whole angle are seen as symbols of Chinese characters, Statistical results of a few Chinese characters are always larger than the actual number of Chinese characters to address the shortcomings, I prepared for the process, as follows

CF卡数据手册，内有详细的工作模式说明和寄存器配置-datasheet for cf card

云台控制程序及文件型风机

该文件较全面的介绍了鲁棒控制的相关知识，以及其设计的基本思想，对学习鲁棒控制的人很有借鉴意义，欢迎大家下载！-the document more comprehensive introduction to the robust control of the relevant knowledge, and the basic design idea Robust control for the study of a useful one, we are happy to download!

详细讲叙了单片机开发的注意事项，方法以及开发步骤等知识。-讲叙detailed attention to the development of a single-chip issues, methods and steps, such as the development of knowledge.

unix 下的一个tcp通信例子，看看也许对大家有帮助-unix under a tcp communication examples to see if we might be of help!