在此基础上，用冻结势方法计算了该超晶格系统的价带带阶；用四面体方法计算了该系统的联合态密度。

The valence-band offsets of such systems are calculated by frozen potential method and their Joint density of states has been computed by tetrahedron method.

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它具有很强的吸附能凝聚水分，使包气带水和潜水从液态、汽态向冻结层迁移富集，形成季节性固态地下水。

The high absorption energy makes ground water in air containing zone move towards the freezing layer and produce seasonal frozen perched ground water.

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本文介绍了一种新的液氮喷雾式食品流态化速冻装置，实验证明该装置在食品的冻结速度、冻结质量等方面都有所提高。

A new type of LN 2-spraying fluidized freezing system is introduced in this paper. The experimental results show that the freezing rate and the quality of food are both improved.

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