Charge is a fundamental physical property of matter that is responsible for its interactions with electromagnetic fields......

A new method for solving electromagnetic field boundary value problem is given.Byusing this method,the boundary value pr......

It is proved that in a regular boundary system of rectangular,cylindrical or sphericalcoordinate,an arbitrary vector fun......

The nature and the origin of the fine structure are described. Based on the vortex model and hydrodynamics, a comprehens......