China is a country in the period of economy takeoff. We cannot use the common method to forecast its fu-ture econotmy level. This paper establishes an economic
Based on the theories of landscape ecology,landscape eco-environment in the coutrol watershed by reser-voir of Erlong Mountain in Heilogjiang Province was analy
Based on the monthly mean temperature, the changing processes and tendencies of temperature during1951-2000 in Jilin Province, which is in Northeast China, are
In the forming of the Dynamic System of Tourism Development (DSTD) in developed regions from theview of supply side, the Delphi Method and the Analytical Hierar