The economy of the bordering area between Hunan, Hubei, Chongqing and Guizhou is developing slowly where the inhabitants are poor but natural and human tourist resources are rich.

Assessment of sustainable development in Yanbian forest region based on ecological footprint model.;

Based on analyzing the experiences of nature reserve functional zoning from domestic and overseas, it is proposed that the adjacent areas of nature reserve are the areas within the defined distance outside of the nature reserve.

wnhole water-producing-injection technology in the same well at marginal blocks of Shengli petroliferous province.;

The edge area of university campus connects the campus and the city,also conects building and the environment.

On the basis of explaining "edge effect",edge area and types of edge areas,the authors analyze the conditions for the construction of Nan-Xiang city cluster from the respects of edge effect,channel condition,economic status,infrastructure,culture,education and technology and so on,and puts forward the suggestions of banishing the restriction of "canton economy",giving prominence to mutually-compl.