The historio-geographical studies of the frontiers exhibited unprecedented consciousness of misery, crisis and world awareness with distinctive characteristics of the times.
并且，此一时期边疆史地研究呈现出的空前的忧患意识和世界性意识，具有鲜明的时代特征。
Previous studies suggested the absence of hierarchical structure in geographical networks, such as the Internet, the electrical power grids, and so on.
以往的实证研究暗示，节点具有明确几何位置的网络，如计算机互联网、电力网络等，不表现层次性。
The thesis studies the quantization of the geological division and geographical information system, and develops the development of geotechnical exploration information management system.
本文以工程地质量化分区及地理信息系统作为主要内容进行研究，同时结合上述理论研制了岩土工程勘察信息管理系统。
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