Study on the infestation positions of rice yellow stem borer in rice stem at earring stage and its control technologies;

According to pyramid with complex geometric shapes its percussive force and intrusion displacement are calculated and analyzed,so that reasonable range is obtained to determine major geometric parameters of pyramid,which provide theoretical references for further study of penetration ability and damage status of pyramid.

Intrusion locating detection module and intrusion locating program was added in honeypot network system.

According to studies of these rock bodies in such aspects as their shapes, internal structures, contact relationships and petrochemical composition, the author has classified these rock bodies into deroofing emplacement type and injection emplacement type, and pointed out the existence of two metallogenic types related respectively to these two type.

In the light of the infected position, the ways of the invasion of the particles and the diffusion of their filial generation were that the particles approached and attached to the cell walls as the whole form, and then the cell walls became hollow, and finally the cells enclosed the particles.

The variation of soil nutrient and microbe on different erosion position of hilly Slope in the latosolic red soil region were studied.