The Beijing-Tianjin-Hebei region boasts rich geothermal resources and new achievements have been made in the exploration and development of geothermal resources in this region based on previous regional investigation....The Beijing-Tianjin-Hebei region boasts rich geothermal resources and new achievements have been made in the exploration and development of geothermal resources in this region based on previous regional investigation.In detail,geothermal reservoirs of Gaoyuzhuang Formation of Jixian System and Changcheng System in Xiongan New Area have been recently discovered,opening up the second space of geothermal resources;the calculation method of the recoverable resources of geothermal fluid with reinjection being considered has been improved in Beijing-Tianjin-Hebei region,and uniform comprehensive assessment of shallow geothermal energy,hydrothermal geothermal resources,and hot dry rocks(HDR)geothermal resources in the whole Beijing-Tianjin-Shijiazhuang region has been completed.The scientific research base for cascade development and utilization of geothermal resources in Beijing-Tianjin-Hebei region has applied hydraulic fracturing technology to the geothermal reservoirs in Gaoyuzhuang Formation.As a result,the production capacity doubled and two-stage cascade utilization composed of geothermal power generation and geothermal heating were realized,with the first-phase installed capacity of 280 kW and the geothermal heating is 30000 m2.In this way,a model of the exploration,development,and utilization of geothermal resources formed.Large-scale utilization has become the future trend of geothermal resource development in Beijing-Tianjin-Hebei region,and great efforts shall be made to achieve breakthroughs in reinjection technology,geothermal reservoir reconstruction technology,thermoelectric technology and underground heat exchange technology.展开更多
针对特殊地形或自然灾害对通信系统的影响,为提高信息传输有效性,建立基于空天地信息一体化的通信系统。针对该系统信息实时可靠传输的需求,为空天地信息一体化网络构建移动骨干网(mobile backbone network,MBN),MBN可有效简化路由,提...针对特殊地形或自然灾害对通信系统的影响,为提高信息传输有效性,建立基于空天地信息一体化的通信系统。针对该系统信息实时可靠传输的需求,为空天地信息一体化网络构建移动骨干网(mobile backbone network,MBN),MBN可有效简化路由,提高网络资源利用率,从而保证信息的实时可靠传输。提出了一种分布式MBN构建与维护(distributed mobile backbone network construction and maintenance,DMBNCM)算法。理论分析和仿真表明,DMBNCM算法构建的MBN是连通的,且消息和时间开销较小,对基于空天地信息一体化的通信系统有一定的应用前景。展开更多
基金This work is financially supported by the Special Fund for National Key Research and Development Program of China(2018YFC0604306)China Geological Survey project Survey and Assessment of Geothermal Energy in Xiongan New Area(DD20189112)Technology Innovation Center of Geothermal and Hot Dry Rock Exploration and Development,Ministry of Natural Resources.
文摘The Beijing-Tianjin-Hebei region boasts rich geothermal resources and new achievements have been made in the exploration and development of geothermal resources in this region based on previous regional investigation.In detail,geothermal reservoirs of Gaoyuzhuang Formation of Jixian System and Changcheng System in Xiongan New Area have been recently discovered,opening up the second space of geothermal resources;the calculation method of the recoverable resources of geothermal fluid with reinjection being considered has been improved in Beijing-Tianjin-Hebei region,and uniform comprehensive assessment of shallow geothermal energy,hydrothermal geothermal resources,and hot dry rocks(HDR)geothermal resources in the whole Beijing-Tianjin-Shijiazhuang region has been completed.The scientific research base for cascade development and utilization of geothermal resources in Beijing-Tianjin-Hebei region has applied hydraulic fracturing technology to the geothermal reservoirs in Gaoyuzhuang Formation.As a result,the production capacity doubled and two-stage cascade utilization composed of geothermal power generation and geothermal heating were realized,with the first-phase installed capacity of 280 kW and the geothermal heating is 30000 m2.In this way,a model of the exploration,development,and utilization of geothermal resources formed.Large-scale utilization has become the future trend of geothermal resource development in Beijing-Tianjin-Hebei region,and great efforts shall be made to achieve breakthroughs in reinjection technology,geothermal reservoir reconstruction technology,thermoelectric technology and underground heat exchange technology.
文摘针对特殊地形或自然灾害对通信系统的影响,为提高信息传输有效性,建立基于空天地信息一体化的通信系统。针对该系统信息实时可靠传输的需求,为空天地信息一体化网络构建移动骨干网(mobile backbone network,MBN),MBN可有效简化路由,提高网络资源利用率,从而保证信息的实时可靠传输。提出了一种分布式MBN构建与维护(distributed mobile backbone network construction and maintenance,DMBNCM)算法。理论分析和仿真表明,DMBNCM算法构建的MBN是连通的,且消息和时间开销较小,对基于空天地信息一体化的通信系统有一定的应用前景。