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 mathematical expression of magnetic field distribution in the symmetric axis of parabolic current is deduced by using Biot-Savart s law ,the curve of the magnetic field distribution is showed by using the method of numerical integration.

The results show that the Field Synergy Principle can be applied not only to parabolic flow, but also to complex elliptic flow and heat transfer with recirculation.

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.