group of isotropy

This paper discusses the relations between a 2-harmonic submanifold and aminimal submanifold with isotropic second fundmental form in Sn+p and obtains thepinching conditions on the second fundmental form and the Ricci curvature for compact 2-harmonic submanifolds in Sn+p.

研究了ｎ＋Ｐ维单位球面中具有迷向第一基本形式的ｎ维２－调和子流形与极小子流形之间的关系，获得了关于第二基本形式与Ｒｉｃｃｉ曲率的拼挤条件。

In this paper,we prove that two types of isotropic totally real submanifolds with flat normal bundle in a complex projective space must be minimal.

证明了复射影空间中两种类型法丛平坦的全实迷向子流形必是极小的,并在紧致的情形确定了它们的具体形状。

The paper showed a parameter representation of isotropic vector in complex vector space, and obtained the some properties.

给出了复向量空间中的迷向向量的一种参数表示,并由此获得了迷向向量的一些性质。

Field experiments for controling the tea tussock moth,Euproctis pseudoconspersa,by mating disruption with sex pheromone.;

应用性信息素迷向法防治茶毛虫的田间试验

Control effect on diamondback moth,Plutella xylostella,with sex pheromone by mating disruption in cabbage field at high mountain;

性诱剂迷向法防治高山甘蓝田小菜蛾研究

Using Sex pheromones control pests are effective methods in nuisance less agriculture production, The experiment of Mating disruption of confuser-A introduced from Japan control apple major pests include Carposina niponesis, Phyllonorycter ringonella heparana and Adoxophyes orana fasciata, in one year or two years.

利用性信息素控制害虫是无公害农业生产者的一种方法,引进日本产复合搅乱剂-A的迷向法控制苹果桃小食心虫、金纹细蛾、卷叶蛾等几种主要害虫试验,无论是连续二年还是当年的处理,其危害率都较对照降低40%~90%,且复合性信息素一次处理,简便易行。