This paper introduces the land use patterns un de r the elevated railway of Tokyo,from the angle of different lines,the construct ion ages,the structure of adjoining space and the condition of the lateral road s,analyzes the land use under bridge through an investigation of Shanghai Pearl Line,aiming at optimizing the land use under the elevated urban railway in Shang hai.

Strategy-making method of overhead line control and undergroundcable retrofitting based on clustering algorithm;

Utilizing computer to protract installation curve of overhead line;

With consideration of the shortage that the tradition discriminant method of overhead lines of rural power grid is complex and hard to programme, a discriminant algorithm of control climate condition of rural power grid based on iterative technology is introduced.

Calculation of lightning withstand level for energy-user overhead transmission line and improving measures;

The formation and classification of lightening overrating voltage and the ways for regular and irregular lightening-proof of the overhead transmission line are introduced.

The control condition of carrying capability of overhead transmission line is introduced, and a deep analysis is given on operation terms of transmission lines and weather parameters survey in decades in Guangdong, and allowable current I0 on transmission line under normal operation for Guangdong Power Grid is established.