In the paper, we imitate indoors the setting and hardening conditions of constanter minus temperature high-performance concrete under the environment of Qinghai-Tibet plateau.

According to the fact that a universal coupling was constantly broken in a mine, the paper gave a common formula of the drive rate of a bi universal coupling on the basis of other people s work, and thus a universal conclusion was obtained that the drive rate can be kept constan

For eliminate redundant stress in spring unit brought by continuously variation of strain,in wind spring device,the adopt spiral output wheel with continuously variant radii was used and the variation of moment can be canceled out by variation of radii,the approximate constant output force can be obtained.

6T static magnetic field with different processing time were not significant.

This dissertation investigated the effect of static magnetic field and pulse electromagnetic field on the cells growth and inulinase biosynthesis of Kluyveromyces fragilis, based on studing the properties and biosynthesis conditions of Kluveromyces fragilis inulinase.

Numerical modeling of vertical 2D unsteady flow and suspended material distribution;

Study on the influences of daily regulation unsteady flow in hydroelectric project to mooring force;

Numerical simulation of unsteady flow in Xiangjiaba Hydropower Project;