Based on the discharge theories of long air gap,a leader propagation model on lightning shielding failure is presented in this paper.

Considering the randomness of leader propagation,a lightning stroke simulation model on lightning shielding performance of transmission line was presented,in which the simulation charge method was applied.

This paper investigate the development, the breakdown process, and the discharge path selection of the lightning leader while there exsit corona iorns in the space.

In the past 30 years,every innovation of theory and practice would start from mind emancipating,which is the forerunner of reform and opening.

Among the join forces of social development, philosophy work like a cock diligent in heralding the dawn to act as the guide and impetus of ideological liberation, innovation of thinking mode, the comprehensive development of a person, the development of spiritual civilization, theoretical creativity of Marxism and social modification.

The control concepts and configuration characteristic are detailed,as well the experiment principle and process of the pilot valves are introduced.

Results and dynamic characteristics of pilot test of surfactant/polymer binary combination flooding in western No. 7 district in Gudong Oilfield;

Composite sand control pilot test in Shu 3 area;

Optimization of succeeding water flooding plan after steam drive pilot test in Block Qi40;