设计一个文件系统可视化模拟系统(file system visual simulator,FSVS),利用软件可视化技术来帮助学生理解文件系统的运行原理。提出以操作系统模拟器为核心,运行真实文件系统并跟踪其运行过程从而产生可视化输出的设计方法,给出并分析...设计一个文件系统可视化模拟系统(file system visual simulator,FSVS),利用软件可视化技术来帮助学生理解文件系统的运行原理。提出以操作系统模拟器为核心,运行真实文件系统并跟踪其运行过程从而产生可视化输出的设计方法,给出并分析了FSVS的层次化系统框架及其关键技术。实例结果表明,该系统与OS文件系统原理相符合。展开更多
A GPS IF signal computer simulation method is proposed in this article. The carrier Doppler frequency and the total propagation and delay time can be modeled or calculated with the input GPS satellite ephemeris file. ...A GPS IF signal computer simulation method is proposed in this article. The carrier Doppler frequency and the total propagation and delay time can be modeled or calculated with the input GPS satellite ephemeris file. The simulated GPS IF signal outputs to a text file for post-processing and analysis. The simulation signal spectrum is compared with the received real GPS IF signal spectrum, and the correctness of the simulation result is verified.展开更多
文摘设计一个文件系统可视化模拟系统(file system visual simulator,FSVS),利用软件可视化技术来帮助学生理解文件系统的运行原理。提出以操作系统模拟器为核心,运行真实文件系统并跟踪其运行过程从而产生可视化输出的设计方法,给出并分析了FSVS的层次化系统框架及其关键技术。实例结果表明,该系统与OS文件系统原理相符合。
基金Supported by the Research Fund (2008-2009) of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensingthe Na-tional 863 Program of China (No2008AA12Z308)
文摘A GPS IF signal computer simulation method is proposed in this article. The carrier Doppler frequency and the total propagation and delay time can be modeled or calculated with the input GPS satellite ephemeris file. The simulated GPS IF signal outputs to a text file for post-processing and analysis. The simulation signal spectrum is compared with the received real GPS IF signal spectrum, and the correctness of the simulation result is verified.
