Applying Krasnosel′ skii fixed point theorem of cone expansion_compression type, the existence of positive radial solutions for some second_order nonlinear elliptic equations in annular domains, subject to Dirichlet boundary conditions, is investigated.

The multiplicity of positive radial solutions of equation -div(|Du|p-2Du) = λf(u) is studied inannular domains in Rn, n≥22.

The authors studied the asymptotic behavior of the radial minimizers uε of a p-Ginzburg-Landau functional in an annular domain.

Through calculating the discharge quantity of nitrogen (N) and phosphorus (P) from each cage, and taking the maximum restriction values of N and P for eutrophication as control values, a mathematical model is employed to simulate the restriction of marine environment of the Gongwan Bay on the capacity of cage-culture.

On the basis of difference between industrial regional development and individual construction project, this paper elaborates the characteristics of regional EIA in industrial developmental area, and puts forward working contents of regional EIA in order to enrich and develop technical methods.

With in-depth implementation of environmental impact assessment system,the scope of implementation has been transformed from project EIA to regional EIA and planning EIA.

Application of the technology in environmental field is introduced, and the point of molecular imprinting technique bringing a new line to environmental field is presented.

The application of global positioning system on environmental field is concluded.

Key analysis was also conducted, which include several factors of regional environment, such as landform, physiognomy, climate, natural resource, and the factors of regional culture, such as architecture style, human sight, life style, form, and color.

The tourism resource of Xinjiang is characterized by its unique regional environment .

This article studies the patterns of rival recognition among the fast consuming commodity enterprises according to their regional environment.