1) closed surface without boundary
无界闭曲面
2) unlimited and limited surface domain
无界和有界曲面域
3) closed unbounded set
无界闭集
1.
In this paper,we introduce concepts of closed unbounded sets and stationary sets,and investigate their poperties.
本文引进了~(
4) closed surface
封闭曲面
1.
The rational symmetry of closed surfaces of the curved surfaces of d chitals on their expasion axes has been studied in the article.
本文讨论了d轨道常见曲面的各瓣封闭曲面绕其伸展轴的旋转对称性。
5) closed surface
闭曲面
1.
The Minkowski formula of oriented closed surfaces in R 3 is generalized to that of the oriented closed supersurface in space forms M n+1 (a) .
把 R3 中二维闭曲面的 Minkowski公式推广到空间型中的定向闭曲面之
6) closed hypersurface
闭超曲面
1.
In this paper,we studied the closed hypersurface with non zero const ant mean curvature in a unit sphere,and found the hypersurface is a small sphere of Hr-torus under certain condition of the square of the length of the second foundamental form and the mean curvature.
研究了单位球空间中平均曲率为非零常数的闭超曲面,得到在超曲面的第二基本形 式长度平方与其平均曲率满足一定的条件下,超曲面为小球面或Hr──环面。
补充资料:真菌界
真菌界 Fungi 生物的一界。该界成员包括粘菌、真菌和地衣菌,均属 真核生物。真菌广泛分布于全球各带的土壤、水体、动植物及其残骸和空气中,营腐生、寄生和共生生活。自C.von林奈把生物区分为动物和植物两界以后的200多年以来,真菌因固着生活和细胞具壁而一直被归入植物界。从20世纪中叶起,生物学家认为真菌的起源、组织、营养方式和细胞壁的组分等都与植物不同,把它归入植物界并不妥当。真菌营养方式是“吸收异养型”,主要作用是分解,它与植物的光合自养和动物的摄食异养,都有着本质的区别。所以,在近20~30年的4界以上分类系统中,大多将真菌独立成界。下分粘菌、藻菌、子囊菌、担子菌、半知菌等类群。 |
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参考词条