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北京市地处地质活动较为频繁的地区,对全市打造"一环六放射"交通网络产生了重大影响.为保障2022年北京冬季奥运会的如期举行以及京津冀一体化的协同发展,以解决协同发展区重大地质问题为切入点,结合当前全球导航卫星系统动态监测、三维激光扫描以及无人机摄影测量与遥感等先进的技术手段,联合开展了"京津冀协同发展交通网络地质安全监测预警系统"项目.项目在实施过程中,研发了数据管理平台,实现了监测数据的"管、寻、控"一体化服务,为交通网络的重大地质灾害防治、预警提供了重要保障. 相似文献
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以京津冀协同发展交通网络地质安全监测预警系统项目为背景,选取北京市房山区G108国道王家台不稳定斜坡及堂上村泥石流两个典型区域,通过布设GNSS设备监测地表位移情况,阐述了GNSS地表位移监测的点位选择及埋设、监测网的布设、数据处理等内容.对2019年4—7月GNSS监测数据的结果进行对比分析,其地表位移发生一定变化且在一定范围内波动,但相对稳定,可作为地质灾害安全监测预警的数据依据. 相似文献
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陆衍 《测绘与空间地理信息》2015,(8)
针对复杂地质环境条件下的上海轨道交通结构安全问题,建立健全的轨道交通安全监测机制,包括基准网建设和监测、长期监测、监护监测和巡查等。在此基础上提出了改进的模糊层次分析法,建立了轨道交通预警评估体系,开发了上海轨道交通数字化监护管理系统,并应用于轨道交通4号线海伦路站,实现了基于地面沉降、地质环境、收敛等地质环境监测数据的轨道交通安全预警。 相似文献
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《International Journal of Digital Earth》2013,6(1):80-87
Abstract Cultures throughout the world are associating with the rivers. People depend upon the rivers and their tributaries for food, water, transport, and many other aspects of their daily lives. Unfortunately, human beings have not calculated the accurate lengths for the great rivers even today. The lengths of the rivers are very different in popular textbooks, magazines, atlases and encyclopedias, etc. To accurately determine the lengths of the principal rivers of the world, the combination of satellite image analysis and field investigations to the source regions is proposed in this paper. The lengths of the Nile, Amazon, Yangtze, Mississippi, Yellow, Ob, Yenisey, Amur, Congo and Mekong, with lengths over or close to 5000 km, were calculated using the proposed method. The results may represent the most reliable and accurate lengths of the principal rivers of the world that are currently achievable. 相似文献
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In this letter, we are trying to resolve the electromagnetic problem for the movements of the superconducting particles of the protoplanetary cloud in the magnetic field of Saturn. The force of levitation (Meissner-Ochsenfeld phenomenon) is introduced to the field of planetary science for the first time. It is shown from our theoretical analysis that rings of Saturn might have a superconducting origin, and rings might levitate within magnetic equator plane of the planet. 相似文献
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