Great earthquakes of Chinese mainland and its vicinity usually cluster in certain regions during certain periods. We call it major regions of great earthquakes, or major regions briefly in this paper.The major regions...Great earthquakes of Chinese mainland and its vicinity usually cluster in certain regions during certain periods. We call it major regions of great earthquakes, or major regions briefly in this paper.The major regions of different periods can migrate through long distance in space. We have studied mechanism of formation of major regions. It is proposed that the ductile layer of the lithosphere is the place where the major regions form, and deformation of the ductile layer controls the locations and shape of major regions. and the actions of the plate boundaries around the continent are the main driving forces. A two-dimensional viscoelastic finite element model is established to model the deformation field and Stress field of the Chinese mainland and its vicinity The boundary of the model is divided into 12 segments to represent non-uniform of boundary conditions. The stress concentration areas in the continental ductile Iayer are simulated under various compoundings of different boundary scgments. Six models are worked out in which the stress con centration regions are consistent with the realistic major regions. It is proved that stress concentfation regions can be produced in the ductile layer which are roughly in agreement with the realistic major regions under various actions of different boundary segments.展开更多
The development of China＇s natural gas industry can be described as the story of an ancient but rising industry. In general, the route for China＇s natural gas development is through concentrating resources to accomp...The development of China＇s natural gas industry can be described as the story of an ancient but rising industry. In general, the route for China＇s natural gas development is through concentrating resources to accomplish major undertakings, and expediting development through diversified ownerships.展开更多
全媒体环境下,重大舆情与突发事件舆论引导及相应的科学研究问题日益凸显出行为的复杂性、结构的复杂性、要素间关联的复杂性和环境的复杂性,向目前的引导研究方法论提出新的挑战。以Web of Science和中国知网(China national knowledge...全媒体环境下,重大舆情与突发事件舆论引导及相应的科学研究问题日益凸显出行为的复杂性、结构的复杂性、要素间关联的复杂性和环境的复杂性,向目前的引导研究方法论提出新的挑战。以Web of Science和中国知网(China national knowledge infrastructure,CNKI)数据库为数据来源,围绕重大舆情与突发事件本身的分析挖掘、指标体系、传播和演化,以及舆论引导策略的宏观政策、态势研判、演化仿真预测和应急响应研究展开述评梳理,最后总结了重大舆情和突发事件舆论引导理论方法、研判分析和预警研究面临的挑战和发展趋势,有助于帮助数智驱动应急管理体系和能力建设发展中新机遇和新挑战方面的落实。展开更多
文摘Great earthquakes of Chinese mainland and its vicinity usually cluster in certain regions during certain periods. We call it major regions of great earthquakes, or major regions briefly in this paper.The major regions of different periods can migrate through long distance in space. We have studied mechanism of formation of major regions. It is proposed that the ductile layer of the lithosphere is the place where the major regions form, and deformation of the ductile layer controls the locations and shape of major regions. and the actions of the plate boundaries around the continent are the main driving forces. A two-dimensional viscoelastic finite element model is established to model the deformation field and Stress field of the Chinese mainland and its vicinity The boundary of the model is divided into 12 segments to represent non-uniform of boundary conditions. The stress concentration areas in the continental ductile Iayer are simulated under various compoundings of different boundary scgments. Six models are worked out in which the stress con centration regions are consistent with the realistic major regions. It is proved that stress concentfation regions can be produced in the ductile layer which are roughly in agreement with the realistic major regions under various actions of different boundary segments.
文摘The development of China＇s natural gas industry can be described as the story of an ancient but rising industry. In general, the route for China＇s natural gas development is through concentrating resources to accomplish major undertakings, and expediting development through diversified ownerships.
文摘全媒体环境下,重大舆情与突发事件舆论引导及相应的科学研究问题日益凸显出行为的复杂性、结构的复杂性、要素间关联的复杂性和环境的复杂性,向目前的引导研究方法论提出新的挑战。以Web of Science和中国知网(China national knowledge infrastructure,CNKI)数据库为数据来源,围绕重大舆情与突发事件本身的分析挖掘、指标体系、传播和演化,以及舆论引导策略的宏观政策、态势研判、演化仿真预测和应急响应研究展开述评梳理,最后总结了重大舆情和突发事件舆论引导理论方法、研判分析和预警研究面临的挑战和发展趋势,有助于帮助数智驱动应急管理体系和能力建设发展中新机遇和新挑战方面的落实。
