数字孪生城市已成为新型智慧城市建设的主流技术路线与发展目标。数字孪生城市的核心是城市信息模型(City Information Modeling,CIM)。传统的GIS+BIM的建模方法存在明显的局限:面向对象的数据组织方式会因对象本身的纷繁复杂和对象ID...数字孪生城市已成为新型智慧城市建设的主流技术路线与发展目标。数字孪生城市的核心是城市信息模型(City Information Modeling,CIM)。传统的GIS+BIM的建模方法存在明显的局限:面向对象的数据组织方式会因对象本身的纷繁复杂和对象ID的私有定义而难以解决数据组织汇聚的问题。北斗网格码技术(包括剖分时间码)提供了一个时空网格框架,可构建地球全域空间数字孪生网格数据模型,其实质是一个基于时空编码的开放性大数据架构,可通过网格关联组织城市多源异构时空数据,支撑数字孪生城市CIM建模。具体建模过程包括时空网格编码、网格关联数据、网格数据加载、数据驱动模型4个步骤。基于北斗网格码的时空网格框架对于CIM平台具有重要的赋能价值。展开更多
Based on the geological tectonics, aftershock activity, earthquake surface rupture and peak ground motion, the geometric and dynamic characteristics of seismogenic tectonics about the 1995 Hanshin earthquake are analy...Based on the geological tectonics, aftershock activity, earthquake surface rupture and peak ground motion, the geometric and dynamic characteristics of seismogenic tectonics about the 1995 Hanshin earthquake are analysed. Nojima fault and Rokko fault have the same trending direction, but opposite dips. Their rising and falling plates are in symmetrically diagonal distribution. The two faults can be defined as thrust strike slip faults and constitute a pivotal strike slip fault. The earthquake just occurred at the pivot, which is the seismotectonics for the earthquake to develop and occur. The pivotal movement along a strike slip fault often leads to the occurrence of large earthquakes, whose dynamic process can be demonstrated by the stress analysis on the torsion of a beam with rectangle section. The displacement of earthquake surface rupture, aftershock density and peak acceleration change in a certain range of epicentral distance just similar as the shear stress changes from the center to the sides in the rectangle section. The distribution characteristics of the heaviest damage areas are also discussed in the article from the aspects of special geological tectonics and seismotectonic condition. The result obtained from the article can be applied not only to realizing the potencial earthquake sources in middle long time, but also to build reasonably the prediction model about earthquake hazard.展开更多
文摘数字孪生城市已成为新型智慧城市建设的主流技术路线与发展目标。数字孪生城市的核心是城市信息模型(City Information Modeling,CIM)。传统的GIS+BIM的建模方法存在明显的局限:面向对象的数据组织方式会因对象本身的纷繁复杂和对象ID的私有定义而难以解决数据组织汇聚的问题。北斗网格码技术(包括剖分时间码)提供了一个时空网格框架,可构建地球全域空间数字孪生网格数据模型,其实质是一个基于时空编码的开放性大数据架构,可通过网格关联组织城市多源异构时空数据,支撑数字孪生城市CIM建模。具体建模过程包括时空网格编码、网格关联数据、网格数据加载、数据驱动模型4个步骤。基于北斗网格码的时空网格框架对于CIM平台具有重要的赋能价值。
文摘Based on the geological tectonics, aftershock activity, earthquake surface rupture and peak ground motion, the geometric and dynamic characteristics of seismogenic tectonics about the 1995 Hanshin earthquake are analysed. Nojima fault and Rokko fault have the same trending direction, but opposite dips. Their rising and falling plates are in symmetrically diagonal distribution. The two faults can be defined as thrust strike slip faults and constitute a pivotal strike slip fault. The earthquake just occurred at the pivot, which is the seismotectonics for the earthquake to develop and occur. The pivotal movement along a strike slip fault often leads to the occurrence of large earthquakes, whose dynamic process can be demonstrated by the stress analysis on the torsion of a beam with rectangle section. The displacement of earthquake surface rupture, aftershock density and peak acceleration change in a certain range of epicentral distance just similar as the shear stress changes from the center to the sides in the rectangle section. The distribution characteristics of the heaviest damage areas are also discussed in the article from the aspects of special geological tectonics and seismotectonic condition. The result obtained from the article can be applied not only to realizing the potencial earthquake sources in middle long time, but also to build reasonably the prediction model about earthquake hazard.
