Aim To study the chemical constituents of Artemisia anomala S.目的研究南刘寄奴的化学成分.Choice having introduced the hammerhead and cleading chemical composition.介绍了锤头和衬板化学成分的选择.the chemical composition of the soil土壤的化学成分Chemotaxis ...
航图是专门用于导航的一种地图.Charts are a map adapted specially for navigation.本文提出了一种用于车辆导航的地图匹配算法.An improvement of map matching method for vehicle navigation system is presented.星间测距是重力测量卫星和卫星自主导航的关键技术.Inter - satellite ranging is ...