在第一布里渊区中出现的杂质带的反常色散实际上是能带折叠的结果。
In fact, the seemingly anomalous dispersion of the impurity band in the first Brillouin zone is a result from band folding.
这些结果表明锗导带能谷不在布里渊区中心，且具有非球形对称等能面。
Our results indicate that the energy valley of conduction band of Ge is not lying in the center of Brillouin zone and the constant energy surface possesses non-spherical symmetry.
计算表明：在布里渊区边界，界面波有强烈的散射，而在色散曲线上形成间隙。
The calculation shows that the interface modes are strongly scattered at the boundaries of Brillouin Zones, and the band gaps are formed in the dispersion curves of the interface modes.
用简单数学方法就体心立方晶格和面心立方晶格证明了三维情况下布里渊区体积等于倒格子原胞体积。
It is proved that the volume of Brillouin zone and that of the reciprocal lattice primitive cell are equal for BCC lattice and FCC lattice in three dimensions by a simple mathematical method.
其次，在给定工作频率的情况下，分析了不同纵向波矢量和不同调制系数时的横向波矢量间布里渊区色散特性。
Secondly, when the operation frequency is given, the dispersion relation between transverse wave vectors were analyzed with various longitudinal wave vector or modulation coefficients.
其次，在给定工作频率的情况下，分析了不同纵向波矢量和不同调制系数时的横向波矢量间布里渊区色散特性。
Secondly, when the operation frequency is given, the dispersion relation between transverse wave vectors were analyzed with various longitudinal wave vector or modulation coefficients.
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