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说明：  该程序基于QPSK调制，信道使用基于最简单的高斯白噪声，评估了该系统的误码率特性(The program is based on QPSK modulation, and the channel usage is based on the simplest Gaussian white noise. The bit error rate characteristics of the system are evaluated.)

多个雷达间坐标转换，极坐标和直角坐标转换(Coordinate conversion between different radars, polar coordinates and Cartesian coordinates)

利用VB开发的推箱子小游戏，支持自定义地图及关卡。可完美编译运行，是学习游戏开发的好材料。

说明：  工作中的闭环思维 - Closed-loop thinking in work(Closed-loop thinking in work)

前几天看到有人在论坛上寻找二进制浏览、编辑代码，自己前几天又不是很忙，就摸索着写了这个程序-saw a few days ago was at the Forum for binary view, edit code, a few days before his is not so busy, writing on the exploration of this process

stm32103平台的嵌入式c语言的简单shell实现(Simple shell implementation of embedded C language on STM32103 platform)

Given N rational numbers in the form "numerator/denominator", you are supposed to calculate their sum. 输入描述: Each input file contains one test case. Each case starts with a positive integer N (<=100), followed in the next line N rational numbers "a1/b1 a2/b2 ..." where all the numerators and denominators are in the range of "long int". If there is a negative number, then the sign must appear in front of the numerator. 输出描述: For each test case, output the sum in the simplest form "integer numerator/denominator" where "integer" is the integer part of the sum, "numerator" < "denominator", and the numerator and the denominator have no common factor. You must output only the fractional part if the integer part is 0.(Input Description: Each input file contains one test case. Each case starts with a positive integer N (<=100), followed in the next line N rational numbers "a1/b1 a2/b2 ..." where all the numerators and denominators are in the range of "long int". If there is a negative number, then the sign must appear in front of the numerator. Output Description: For each test case, output the sum in the simplest form "integer numerator/denominator" where "integer" is the integer part of the sum, "numerator" < "denominator", and the numerator and the denominator have no common factor. You must output only the fractional part if the integer part is 0.)

Reporte de cobranza detallada por vendedor

id car in China ,so you can be familiar with the car where it comes from

利用Steger_Warming格式求解一维Riemann问题(It is a computational fluid dynamic solver for solving classical Riemann problem with the scheme of Steger_Warming.)