kTest results show that glass insulator on 220kV lines subjected to lightning flashover still have electro-mechanical performance conforming standard requirement.

Regarding Operation of transmission line,the lightning flashover of synthetic insulators are analysed,and resoving measures for more lighting happen areas are presented.

The paper introduces the development process of a new lightning flashover current sensor and main problem solved,and gives the research result.

High-frequency(HF) skywave over-the-horizon radar(OTHR) looks down its targets from the ionosphere,it has a large operating range and a large cover areas,but it also receives strong backscatterer echoes from the terrain and sea,and interference,such as radio frequency interference,industrial interference,impulsive noise,lightning impulsive,meteor trail echoes and so on.

The Reason of Blitzkrieg Thought Prevalenting in Germany in World War Ⅱ;

Blitzkrieg theory itself has not withered away, on the contrary, experience and lessons have been learned, appling to th.