农机监控调度系统的设计与实现

针对目前农机作业中信息发布滞后、农机资源调度不合理、效率低下等问题，提出一种基于地理信息系统(GIS)、通用分组无线业务(GPRS)及全球定位系统(GPS)技术的农机监控调度系统，运用GPRS数据传输技术和GIS组件MapObjects，实现农机作业信息的即时采集与监控调度。为满足实时计算的需要，采用A-Star寻路算法规划农机的调度路径。应用结果表明，该系统能有效管理和调度农机，提高作业效率。

Design and Implementation of Agricultural Machinery Monitoring and Scheduling System

A virtual machine-based transparent computing system called MMNC-VX is implemented so that heterogeneous operating systems can run unmodified on-demand in a transparent computing environment, but its performance has the very big disparity compared with PC. In order to solve this problem, this paper presents a lightweight virtual machine based transparent computing system LBTC which only virtualizes network devices and allows user operating system to access other devices except network device directly to decrease extra overhead because of virtualization. Meanwhile LBTC adds a virtual storage device model in service operating system to redirect storage I/O requests to be dealt with by the server to implement transparent computing. Test results show the prototype’s performance has the same level as PC with the same hardware and is improved compared with MMNC-VX.