The article analyzes the definition of electric-potential of electrostatic-field in different teaching material of college physics and discusses the selection of reference point of finite-electriferous-object and infinite-electriferous-object in electrostatic-field.

The Convergence of Time-Space Continuous Finite Element Method for First Order Hyperbolic Equation;

By theoretical analysis superconvergence of continuous finite element method on nodal points in mesh is proved.

Basing on the idea of embedded discontinuous finite element method,a class of enrichment displacement function-the exponent discontinuous function is presented to stimulate the discontinuous character resulted by discontinuity such as crack or joint.

By a maximal element theorem in product FC-spaces,the existence of solutions for such kinds of system of generalized vector quasiequilibrium problems was proved.

In this paper,some abstract generalized vector equilibrium problems in a FC-space are established,and by applying the generalized R-KKM type theorem in toplogical space and the KKM theorems in a FC-space,the equilibrium point existence of these equilibrium problems is discussed.