使用原始套接字实现ping命令的功能,以指定发送报文数。 可以指定发送报文长度。 可以指定发送报文的TTL值...

电脑组机程序,后台添加配件的价格与名称.前台用户选择后自动算总价-Computer Section Machine process

用户输入ip段前两位 则进行自动扩展并写入文本文件，-User input ip first two paragraphs are automatically extended and write text files,

WLAN仿真－发送机 wlan No Comments 设置完系统参数后，开始产生发送数据。 1. 产生随机的发送bit（tx_bits），这里不考虑信道编码。 2. QAM映射 3. 将数据映射到不同载波，形成OFDM符号 4. 产生pilot，并将pilot插入OFDM符号中 5. 加入dc和guard子载波 6. 进行ifft，将频域信号变到时域，并加入循环前缀 7. 对信号进行overlap window 8. 在时域产生short preamble 9. 在时域产生long preamble 10. 将preamble和数据符号组成packet 11. 升采样 得到信道传输的数据Tx_signal_up 具体程序见附件 wlan_transmitter.m-WLAN Simulation- wlan No Comments transmitter system parameters set finished, the beginning to have to send data. 1. Have sent random bit (tx_bits), here does not consider channel coding. 2. QAM mapping 3. The data is mapped to a different carrier to form OFDM symbols 4. Have a pilot, and pilot inserted OFDM symbols 5. Adding dc and guard subcarriers 6. To carry out ifft, will change the frequency domain signal to time domain, and add cyclic prefix 7. the signals overlap window8. In the time domain have a short preamble9. In the time domain have a long preamble10. the preamble and data symbols packet11. or sampling re

pku解题，以及一些常用的技巧， 求插座的数目-pku evaluations, as well as some commonly used techniques, the number of outlets for

用DELPHI编写的聊天程序-prepared with the DELPHI chat program

sunplus8202L原理图,protel99格式的，仅供参考-sunplus8202L schematics, protel99 format, for reference only

一个模拟钢琴的源程序- Simulates the piano the source program

二重积分 Guass―L高精度求积计算，精度高，速度快-double integral Guass-L for the calculation of high-precision, high accuracy and speed

在matlab的条件下，开发BP网络的优化方法，对边坡的安全系数进行分析-In matlab under the conditions of the development of BP network optimization method, the slope factor of safety analysis

适用于不小心更新了windows系统的用户，可以去除一直显示在屏幕左下角的恶心的小星-apply to careless update of the Windows system users, Removal can be displayed on the screen have been the lower left-hand corner of the small-nausea