Mining knowledge from result comparison between spatial clustering themes

This paper introduces some definitions and defines a set of calculating indexes to facilitate the research, and then presents an algorithm to complete the spatial clustering result comparison between different clustering themes. The research shows that some valuable spatial correlation patterns can be further found from the clustering result comparison with multi-themes, based on traditional spatial clustering as the first step. Those patterns can tell us what relations those themes have, and thus will help us have a deeper understanding of the studied spatial entities. An example is also given to demonstrate the principle and process of the method.     

鉴史辑要图说

我收藏的清光绪三十三年(1907年)出版的《鉴史辑要图说》,是一册较为详尽介绍中国历史沿革的图册。该书共有14幅地图,均为彩色：书为16开本,地图为对页8开;封面、封底为布面烫印。书中14幅地图分别为唐虞夏商图、周朝列国图、战国七雄图、秦三十六郡图、汉代图、三国图、南北朝及隋图、唐代图、五代图、北宋及辽图、南宋及金图、元代图、明代图、大清国图。     

中国古代工程测量

本文以大量史实，概述了中国古代以勾股术、重差术为代表的工程测量的理论与方法，列举了矩、水平仪等有代表性的测量工具，勾画出中国古代工程测量的基本面貌，目的在于以史为鉴，继承传统，开创新局。     

埃及油气田的发现——世界油气发现史话之十一

埃及属世界前２０个石油生产国之例，它的油气产出地质背景属新生代裂谷型盆地，其勘查以持久勘探，逐步见效而著称。