Study on applications of AIS in the northern sea region of China;

Quantitative Appraisal of Agricultural Modernization Progress in Northern Coastal Provinces;

Based on the analysis on the characteristic of seismicity in Beihai region of Guangxi,it is thought that the levels of historical and modern seismicities in Beihai region are both high in some degree.

Based on the multi -period water depth data of the Huanghe Delta Chengbei sea area, the amount and area of sediment erosion and accumulation are calculated and the corresponding contour diagrams and stereograms are plotted for different phases through computer - based method, and the regularity and characteristics of sediment erosion and accumulation are studied.