From the views of meeting boundary conditions, smooth symmetry and convex of yield strength surface under three-dimensional principal stress space, eight different smooth ridge models which are used ingeotecnnical engineering field are commented in detail, and corresponding advanteges and disadvantages of every smooth ridge model are discussed systematically.

The lightweight aggregate concrete four parameter unified intensity destruction criterion,which considers flow plasticity of LWA under high compressive stress is established by the smooth ridge model of double shears unified.

By introducing the characteristic of new technologies about bubbling atomizing small oil gun, direct firing parabola burners of pulverized coal,large size duff store\|house, the author shows the application foreground and advantage of technique and economy about these new technology on old 125 MW,200 MW set in the new electrovalency policy.

The difference between catenary model and parabola model and its influences on the design of ADSS;

The results explain the consistency and difference between the whole growth period of crop moisture parabola model and Jensen′s model of crop growth stages of water in theory,these can provide a reference for optimum distribution about flow of water of irrigation and drainage.