canonical coordinates of the first kind

In this paper, the third version of area coordinate systems for quadrilateral elements (QAC-III) with two coordinate components (T1, T2) is systematically established.

该文系统地建立了具有两个坐标分量(T1,T2)的四边形单元第三类面积坐标系统(QAC-III)。

Based on relevant database of prospecting right announcement,and in view of the actual need of the workto set up geological projects,database of prospect right announcement containing the comprehensive inquiryand inquiry about the coordinate range,etc.

在参考相关探矿权数据库的基础上，针对地质立项工作的实际需要，设计了含有综合查询和坐标范围查询等项的探矿权公告数据库。