In this article, sapwood area is used as a scalar to extrapolate the stand water use from whole tree water use measured by heat pulse velocity recorder(HPVR).
该文在单木液流测定的基础上 ,采用边材面积作为纯量 ,对京北山区水源保护林的主要树种油松、刺槐林进行由单木到林分耗水的推算 。
In this paper,Ricci curvature and scalar curvature of the first Cartan-Hartogs domain in the Bergman metric are obtained,and some p roperties of boundary are investigated.
给出了第一类超Cartan域上在Bergman度量下的Ricci曲率和纯量曲率及其边界性质。
One sufficient and necessary conditions of scalar matrix;
纯量矩阵的一个充要条件