Simultaneous observations of optical and electrical signals and pattern recognition in lightning flashes classification;

It is showed by experiment that if round compress were large, geogrid would deform in same pace with soil and the value of The equivalent additional compress stress is ea.

This paper discusses the method of the optimization of GPS network executing scheme at high precision and large-scale in network form design,districting of simultaneous observation area,sequence of observation,operating mode of control and adjusting.