GPS信号模拟器源代码，串口读取GPS报文，解析，显示GPS信号点，很有用的-GPS signal simulator source code, the serial port to read GPS packets, analyze, and display the GPS signal point, very useful

硬件模拟器。可以实现Linux环境下的硬件模拟，然后在它上面跑操作系统。-Hardware simulator. Linux can achieve hardware simulation environment, and then run the operating system on top of it

N体问题数值模拟器,用于行星系统形成与演化、星系演化等模拟。-numerical simulation of N-bodies problem.