The space-time distribution of earthquakes is usually multi-fractal Set.
地震时空分布通常是多重分形集。
Based on meteorological data of 7 stations in Qingdao during 1961-2004, the space-time distribution characteristic of sand-dust weather in Qingdao is analyzed.
利用青岛市7个站1961—2004年的气象资料，分析了青岛沙尘天气的时空分布特征。
This paper start from the form reason of urban heat island and the space-time distribution, and expounded the countermeasure on heatstroke prevention & lower temperature in midsummer.
前言： 从城市“热岛”形成的原因和时空分布的特征出发，探讨了夏季城市防暑降温所应该采取的措施。
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