The neutral stability curves and the character parameters are given, including the temporal and spatial growth rate, the critical wave number, the maximum wave number and the wave celerity.
获取表征液膜稳定特征的中性稳定性曲线、扰动的时间和空间增长率、临界波数、最大波数、波速的变化趋势；
When population data are used, attribute character, spatial character and temporal character of population data should be paid attention.
在使用中，必须关注人口数据本身蕴含的属性特征、空间特征和时间特征。
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