2019nCov

超简单聊天室，可以发表情语言，很像论坛里面的界面-super-simple chat rooms, language can express feelings, which mimic the interface Forum

通过伪随机序列进行频率调制，并对相位连续性进行优化。调制信号的自相关函数可以通过谱修正进行旁瓣抑制(Frequency modulation is performed by pseudo-random sequence and phase continuity is optimized. The autocorrelation function of modulation signals can be sidelobe suppressed by spectral correction)

ftp协议的server端的编写，利用socket编程编写的ftp协议的server端。-ftp protocol server side of the preparation, the use of socket programming prepared by the ftp protocol server-side.

在第五版的《Windows 程式开发设计指南》中，作者身为倍受敬重的 Windows Pioneer Award（Windows 开路先锋奖）得主，依据最新版本 Windows 作业系统，以可靠的取材资料校定这一本经典之作——再一次深入探索了 Win32 程式设计介面的根本重心。(In the fifth version of the "Windows programming design guidelines", the author as a highly respected Windows Pioneer Award (Windows trailbreaker Award) winner, according to the latest version of the Windows operating system, to draw reliable information to the school setting this classic again, in-depth exploration of the Win32 programming interface fundamental focus.)

基本的电话拔入拔出，包括打分机号，拔打电话各个环节。(Pull out pull into basic telephony, including scoring machine number, dial the phone all aspects.)

定义一个基类MyGraph，要求有一个纯虚函数double Area()=0。从基类派生一个圆类Circle和矩形类Rectangle，再由Rectangle类派生出Square类，分别给出Area()实现。 重载“>>”，实现对图形信息的输入。在主函数中计算三种形状的面积，并显示输出。 (Define a base class MyGraph, requires a pure virtual function double Area () = 0. Derive a circle and a rectangle class Rectangle Circle class from the base class, and then by Square Rectangle class derived class, are given Area () implementation. Reload " > > " to achieve the input of graphical information. Calculate the shape of the three main functions in the area, and display output.)

自动发现替换位置，并进行自动的全部替换。(The replacement position is automatically discovered and replaced.)

说明：  当今世界电子对抗日益激烈，对于雷达低截获和抗干扰能力的研究越来越受到关注。OFDM (Orthorgonal Frequency Division Multiplexing，正交频分复用)雷达具有大时宽带宽积、波形设计方法灵活、频谱利用率较高以及低截获性能好的特性，因此逐渐成为雷达领域的重点研究方向。除此之外，OFDM信号时域和频域波形都比较复杂，当雷达信号采用OFDM技术时，敌方很难精确估计发射信号波形和瞬时频率，使得截获机不容易分析出检测到的雷达信号。当面对敌方的欺骗式干扰时，对于同样具有大时宽带宽积的线性调频信号，OFDM信号具有更好的抗欺骗式干扰的性能，因此OFDM技术在雷达上的运用愈来愈得到关注。(As electronic warfare becomes increasingly fierce, low intercept probability radar has become an important research filed in electronic countermeasures. OFDM (Orthorgonal Frequency Division Multiplexing) radars have gradually emerged due to their high spectrum efficiency, large time-bandwidth product, flexible waveform design methods, and low intercept probability.In addition, because of the complex time-frequency characteristics of the transmitted signal in OFDM radar, the enemy is difficult to estimate the transmitted signal waveform and instantaneous frequency.When faced with enemy deception interference, OFDM signals have better anti-spoofing performance for LFM signals that also have a large time-bandwidth bandwidth product. Therefore, the use of OFDM technology in radar is attracting more and more attention. .)

本程序为课程信息管理系统,,阐释了使用MFC来实现的过程,,(This procedure for the course information management system, and illustrates the process of using MFC to achieve that,)

实现了64qam，16qam和QPSK的误码率仿真(The bit error rate simulation of 64qam, 16QAM and QPSK is realized.)