In order to cut down the pollution of the coastal waters,caused by prawn culture industry and prevent shrimp disease from spreading,a study was carried out on technique for farming shrimpwith closed and purged-in pond.

According to the freedom characteristics of the incipient kinematic chain of internal force closed self-adaptive mechanism,a new method of type synthesis for the kinematic chains was put forward, that is method of contracted graph and subchain.

Comprehensive evaluation procedure of sealing capability of mudstone caprocks in early exploration period in Chengzihe formation of Suibin Depression,Sanjiang Basin;

Gas reservoir in Dongpu depression in the area without halite is buried below 3000m,mainly below 3600m,which is greatly related with mudstone sealing capability changing with depth.