It is proved that the uniform density hypothesis is the sufficiency condition for the proportional expansion hypothesis under the existence of the breech boundary motion and the mass jet.
同时，证明了存在膛底边界运动和质量加入条件下的拉格朗日假设是比例膨胀假设的充分条件。
The motion of phase interface, the temperature distribution and the thermal storage time of the cool storage slab under the first boundary condition were obtained.
获得了以该介质为蓄冷媒介的蓄冷平板在第一类边界条件下凝固时的相界面移动规律、板内温度分布及预测蓄冷时间等参数。
Local artifical boundary condition in time domain is based on concept of travelingwave. It cannot simulate zero-frequency component(evanescent motion) generally.
时域局部人工边界是以行波概念为基础的，原则上不能用于模拟零频分量（消减运动）。
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