wave envelope

Based on these the wave envelope theory of wave groups due to Longuet Higgins is modified.

在此基础上对Longuet-Higgins的群性波包理论进行修正。

Analyses the characteristics of civil air defense works in decay of annual temperature wave, heat storage and air tightness of the envelope, presents the design and calculation of ventilating and air conditioning systems, gives the cooling load index of civil air defense markets in this city.

分析了地下人防建筑在年温度波衰减、围护结构蓄热、围护结构气密性等方面的特点，介绍了其通风空调系统的设计计算方法，给出了该市地下人防商场的冷负荷指标。

These solutions may be reduced to the envelope solitary wave solutions under some conditions.

由这种方法得到的包络周期解在一定条件下可以退化为包络冲击波解或包络孤立波解.