The foundation of generic cabling system design,horizontal channel and permanent link,were introduced in detail.

Based on the theory of permanent link characteristic analysis, the principle of permanent link detection and reparation techniques is introduced?Upon these, a tool which can repair permanent link is designed.

There are two test models for link behavior which are usually using in the project acceptances, but what is the difference? What is impact on it? Which one is better for project acceptances? Let s give some explanation on the permanent link and signal path.

In this paper, the author studied several route schemes selected for permanent road to the pumped storage station in the City of Shenzhen, analysed affecting factors concerned, and summarized know-how and achievement relating to the scheme for the road to the station.

On account of the shortcomings of magnetic circuit of conventional orienting electromagnet, novel permanent magnet circuits for orientation were designed to produce orienting field and demagnetizing field, which can be used for the compression of magnets with radial, parallel, and vertical orientation.

Analysis of perpetual pavement strain distribution and fatigue damage

Through analysis design idea,characteristics of structure,function of pavement layers and nature of materials of semi-rigid pavement and perpetual pavement and combining with Chinese reality,the application conditions for perpetual pavement and semi-rigid pavement are put forward.

The concept of perpetual pavement which was developed by the American Asphalt Pavement Alliance(APA) was referred to, and the design concept of expressway in our country was discussed.