麦克斯韦方程组的研究

库伦电场强度E＆（=q＆／4丌Er。）与外电源的直流电场强度E大不相同。麦克斯韦方程组由四个方程式组成，其中divD=10和curlH=．厂＋aD／at中的D是不相同的。前者为库伦电位移D4（一g4／4ar。），它与电介质的电容率￡无关；后者仅仅为真空媒质中的电通密度D。（=e。E），它与非稳态外直流电源的脉动电场成份有关。把两种不同的D和D。不加区分地捏合在一起，统一用D来表示是不妥的。此方程组的内在矛盾仍然直接影响着如何来定义当代的（绝对）电容率。（绝对）电容率的定义是根椐D=匝呢？还是D自=eE。当代（绝对）电容率的定义需要修改。divD=p和curlH=．，＋aD／at也需要分别找到它们自身应有的表达式。

A Study of the Maxwell＇s Equation Set

The （coulombian） electric field strength E,（=q,/4rceS） and the external source electric field strength H are diametrically difTerent from each other. Maxwell＇s equation set is composed of four equations, the D＇s in the two equations divD=pandcurlH-.l＋aD/Ol of which being different. The （ormer is the （coulombian） electric displacement D, = q/,/3,＇l＂2 and is unrelated to the dielectric coefficient e. while the latter is merely the electric flux density l）=e/-＇ in vacuum media and is closely related to the non-steady-state external I）C source electric field strength E. It is inappropriate to indistinguishably put 1）, and I） that are different together and express them invariably by D. Up to date, the intrinsic contradiction of this equation set is still exerting a direct influence on how to define the contemporary （absolute） permittivity. Is the definition of （absolute） permittivity ）-eE or D,--EH, ？ The present-day definition of （absolute） permittivity is in need of revision. It is also necessa for divD-p and curll-t=.l＋OD/c）t each to find their own expressions.