The resulting settlement maps show how the distribution and density of the rural population around the city changed dramatically between AD 500 and 850, when copán collapsed.
由此产生的聚落地图显示，公元500年至公元850年，科潘古城崩溃时，城市周围农村人口的分布和密度发生了巨大变化。
City as high human settlement of density, the conflict between the human activity and the ecological environment was particularly outstanding.
城市作为高密度的人类聚居地，人类活动与生态环境的矛盾尤为突出。
In this paper, a formula of ground settlement around deep excavation is proposed based on the normal distribution of density function.
本文提出了按正态分布密度函数计算深基坑开挖引起的地表沉降值的公式。
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