The facts indicate that the high density resistivity imaging method is practicable , accurate and apparent geological effects in surveying the terrene shallow water flowing channel, reaches the requirement of detailed detection.

There is wide distribution of Triassic formations in Lunnan area,the detailed research of the distribution of sand bodies and the characteristics of the reservoirs will be valuable to fine exploration in the area.

With the exploration difficulty increasing,the fine exploration becomes more and more important to the oilfields,especially the eastern old oilfields in China.

The result of underground cavern accurately detecting research has successfully applied in Guizhou Yinzidu Hydropower Station for seepage detection in foundation ditch of powerhouse and plugging treatment.

Specimen capacity,detecting precision and voyage sequence are analyzed with the Excel and Origin software for the precision test of a new target detecting equipment.

Then,indexes of detection coverage,detection probability and detection precision were selected to evaluate detection efficiency.

By us- ing the data of phased array weather radar and Doppler weather radar,both obtained from a se- vere tornado and a squall line on 30 May and 2 June 2004 respectively,the radial detection precision, tangential detection precision,scanning time,sensitivity,and reflectivity,radial velocity,the life time of super-cell were compared to investigate their detecting ability and detecting precision.

Aiming at the difficult detection precision test problem for a netted radar system,a method of calculating detection precision for netted radar system is proposed in this paper.