mass equation

On the basis of mass balance two new mass-balance equations for open systems have been attained as follows:which have the advantages of diagramatization and calculation over Grant sequation, and include equations of Brimhall and Dietrich as a special .

从质量守恒原理出发推导出开放系统两个新的质量平衡方程：该方程不仅在图示和计算方面均优于Grant方程，而且还同时将Brimhall和Dietrich质量平衡方程作为一个特例而包容它，并指出由Grant命名的等浓度线（isocon）的不妥之处，建议用系统变化的“质比特征线”（characteristicmass－to－massratioline）代替。

By solving the effective mass equations using the difference method, taking into account the strain effects and valence band mixing effect, we have compared the band structures, DOS′s of valence band and the optical matrix elements for different shaped wells.

采用差分法求解有效质量方程，考虑轻重空穴的混合效应及应变效应，对三种不同形状的量子阱的能带结构、价带态密度、跃迁矩阵元进行了比较。