生态功能分区是生态系统管理的重要环节,基于生态系统服务簇进行生态功能分区对维持生态系统的可持续性具有重要意义。以青藏高原生态屏障区为例,采用生态系统服务和权衡的综合评估模型(Integrated Valuation of Ecosystem Services and...生态功能分区是生态系统管理的重要环节,基于生态系统服务簇进行生态功能分区对维持生态系统的可持续性具有重要意义。以青藏高原生态屏障区为例,采用生态系统服务和权衡的综合评估模型(Integrated Valuation of Ecosystem Services and Trade-offs,InVEST)、修正通用土壤流失方程模型(Revised Universal Soil Loss Equation,RUSLE)和卡内基-阿梅斯-斯坦福模型(Carnegie-Ames-Stanford Approach,CASA)评估产水量、土壤保持、固碳和生境质量,在县域尺度上基于主导的生态系统服务类型将研究区划分3个生态系统服务多功能区(生态调节多功能区E1、生态供给多功能区E2和生态支持多功能区E3),并分析了生态系统服务多功能区的时空变化及影响因素。结果表明:(1)与2000年相比,2015年青藏高原生态屏障区产水量和土壤保持减弱,固碳和生境质量提高;(2)青藏高原生态系统服务多功能区时空变化主要是E1和E3之间的相互转化;(3)降水是影响青藏高原生态系统服务多功能区空间格局形成的最主要因素,人口密度是增幅最明显的因素。社会经济因素和自然因素的共同作用加强了多功能区的相互转化。该研究结果可为青藏高原土地多功能属性的管理和国土空间整体功能的提升提供价值参考。展开更多
This paper describes an onboard computer with dual processing modules. Each processing module is composed of 32 bit ARM reduced instruction set computer processor and other commercial-off-the-shelf devices. A set of f...This paper describes an onboard computer with dual processing modules. Each processing module is composed of 32 bit ARM reduced instruction set computer processor and other commercial-off-the-shelf devices. A set of fault handling mechanisms is implemented in the computer system, which enables the system to tolerate a single fault. The onboard software is organized around a set of processes that communicate among each other through a routing process. Meeting an extremely tight set of constraints that include mass, volume, power consumption and space environmental conditions, the fault-tolerant onboard computer has excellent data processing capability that can meet the erquirements of micro-satellite missions.展开更多
文摘生态功能分区是生态系统管理的重要环节,基于生态系统服务簇进行生态功能分区对维持生态系统的可持续性具有重要意义。以青藏高原生态屏障区为例,采用生态系统服务和权衡的综合评估模型(Integrated Valuation of Ecosystem Services and Trade-offs,InVEST)、修正通用土壤流失方程模型(Revised Universal Soil Loss Equation,RUSLE)和卡内基-阿梅斯-斯坦福模型(Carnegie-Ames-Stanford Approach,CASA)评估产水量、土壤保持、固碳和生境质量,在县域尺度上基于主导的生态系统服务类型将研究区划分3个生态系统服务多功能区(生态调节多功能区E1、生态供给多功能区E2和生态支持多功能区E3),并分析了生态系统服务多功能区的时空变化及影响因素。结果表明:(1)与2000年相比,2015年青藏高原生态屏障区产水量和土壤保持减弱,固碳和生境质量提高;(2)青藏高原生态系统服务多功能区时空变化主要是E1和E3之间的相互转化;(3)降水是影响青藏高原生态系统服务多功能区空间格局形成的最主要因素,人口密度是增幅最明显的因素。社会经济因素和自然因素的共同作用加强了多功能区的相互转化。该研究结果可为青藏高原土地多功能属性的管理和国土空间整体功能的提升提供价值参考。
文摘This paper describes an onboard computer with dual processing modules. Each processing module is composed of 32 bit ARM reduced instruction set computer processor and other commercial-off-the-shelf devices. A set of fault handling mechanisms is implemented in the computer system, which enables the system to tolerate a single fault. The onboard software is organized around a set of processes that communicate among each other through a routing process. Meeting an extremely tight set of constraints that include mass, volume, power consumption and space environmental conditions, the fault-tolerant onboard computer has excellent data processing capability that can meet the erquirements of micro-satellite missions.
