为满足中国生态系统研究网络(英文全称Chinese Ecosystem Research Network,简称CERN)对大批量气象规范报表(Excel格式)进行高效快速转换并载入数据库的需求,作者在对当前流行的并行编程方法和技术进行对比研究的基础上,提出了利用Pytho...为满足中国生态系统研究网络(英文全称Chinese Ecosystem Research Network,简称CERN)对大批量气象规范报表(Excel格式)进行高效快速转换并载入数据库的需求,作者在对当前流行的并行编程方法和技术进行对比研究的基础上,提出了利用Python的多进程编程技术实现报表处理的方案,建立了CERN气象规范报表的抽象数据转换模型,并编写了多进程并行处理程序,实现了将大批量气象报表的快速转换载入Oracle数据库的功能。同时,作者对多进程编程的不同参数设置情景下的转换效率进行了测试、比较和分析。实验结果显示,利用Python并行编程技术可以充分利用计算机硬件的潜力和性能,从而大大提高处理效率,且方法简便、事半功倍。作者最后进一步建议通过利用Parallel Python软件包,可更充分利用计算机多核性能,更大程度提高处理效率。更加满足CERN日益增长的数据快速处理需求。同时本文为类似数据处理需求提供了可借鉴的参考方案。展开更多
The superconducting RF cavity and superconducting magnet are the key devices in modern accelerators. With the development of accelerator technology and requirement of higher beam energy and luminosity,the cryogenic an...The superconducting RF cavity and superconducting magnet are the key devices in modern accelerators. With the development of accelerator technology and requirement of higher beam energy and luminosity,the cryogenic and superconducting technologies are applied widely in the accelerator construction.Based on the study of several typical accelerators which adopted cryogenic and superconducting technology,this paper introduces the recent activities of cryogenic system in overseas and domestic accelerators.展开更多
An ecosystem communities with is one or many a variety of biotic （living organisms including plants, animals and microbes） and abiotic （things like air, water and mineral soil） components that function in an inter...An ecosystem communities with is one or many a variety of biotic （living organisms including plants, animals and microbes） and abiotic （things like air, water and mineral soil） components that function in an interrelated fashion （Chapin et al. 2012）. These biotic and abiotic components linked together through nutrient cycles and energy flows （Chapin et al. 2012）. Ecosystems provide humanity with a wide range of services, which are vital to sustaining human health and well-being, and social and economic development （MEA 2005）. These services are categorized into provisioning, regulating,展开更多
生态系统长期观测(Long-term Observation for Ecosystem,EcoLTO)是开展生态系统演变规律及生态系统对全球变化响应和适应等生态学研究的重要支撑手段,开展高质量监测、获取高质量数据、进行高效数据管理,提供优质数据共享服务是EcoLTO...生态系统长期观测(Long-term Observation for Ecosystem,EcoLTO)是开展生态系统演变规律及生态系统对全球变化响应和适应等生态学研究的重要支撑手段,开展高质量监测、获取高质量数据、进行高效数据管理,提供优质数据共享服务是EcoLTO的使命和目标。从“统一监测”“统一数据管理”到“统一数据产品管理”是实现EcoLTO数据管理目标所经历的3个循环上升阶段。本文提出EcoLTO产品化思想和EcoLTO数据产品概念,介绍具有自主知识产权的EcoLTO数据产品标准规范的概要组成,以及标准规范在中国生态系统研究网络(CERN)数据中心和国家生态科学数据中心(NESDC)“生态网络云”系统的产品存储库中的应用效果。实践证明标准规范具有可行性,可为我国相关行业、机构开展数据全生命周期中数据质量控制、数据产品开发及体系建立、数据管理及共享提供重要依据和参考。展开更多
文摘为满足中国生态系统研究网络(英文全称Chinese Ecosystem Research Network,简称CERN)对大批量气象规范报表(Excel格式)进行高效快速转换并载入数据库的需求,作者在对当前流行的并行编程方法和技术进行对比研究的基础上,提出了利用Python的多进程编程技术实现报表处理的方案,建立了CERN气象规范报表的抽象数据转换模型,并编写了多进程并行处理程序,实现了将大批量气象报表的快速转换载入Oracle数据库的功能。同时,作者对多进程编程的不同参数设置情景下的转换效率进行了测试、比较和分析。实验结果显示,利用Python并行编程技术可以充分利用计算机硬件的潜力和性能,从而大大提高处理效率,且方法简便、事半功倍。作者最后进一步建议通过利用Parallel Python软件包,可更充分利用计算机多核性能,更大程度提高处理效率。更加满足CERN日益增长的数据快速处理需求。同时本文为类似数据处理需求提供了可借鉴的参考方案。
文摘The superconducting RF cavity and superconducting magnet are the key devices in modern accelerators. With the development of accelerator technology and requirement of higher beam energy and luminosity,the cryogenic and superconducting technologies are applied widely in the accelerator construction.Based on the study of several typical accelerators which adopted cryogenic and superconducting technology,this paper introduces the recent activities of cryogenic system in overseas and domestic accelerators.
文摘An ecosystem communities with is one or many a variety of biotic （living organisms including plants, animals and microbes） and abiotic （things like air, water and mineral soil） components that function in an interrelated fashion （Chapin et al. 2012）. These biotic and abiotic components linked together through nutrient cycles and energy flows （Chapin et al. 2012）. Ecosystems provide humanity with a wide range of services, which are vital to sustaining human health and well-being, and social and economic development （MEA 2005）. These services are categorized into provisioning, regulating,
文摘生态系统长期观测(Long-term Observation for Ecosystem,EcoLTO)是开展生态系统演变规律及生态系统对全球变化响应和适应等生态学研究的重要支撑手段,开展高质量监测、获取高质量数据、进行高效数据管理,提供优质数据共享服务是EcoLTO的使命和目标。从“统一监测”“统一数据管理”到“统一数据产品管理”是实现EcoLTO数据管理目标所经历的3个循环上升阶段。本文提出EcoLTO产品化思想和EcoLTO数据产品概念,介绍具有自主知识产权的EcoLTO数据产品标准规范的概要组成,以及标准规范在中国生态系统研究网络(CERN)数据中心和国家生态科学数据中心(NESDC)“生态网络云”系统的产品存储库中的应用效果。实践证明标准规范具有可行性,可为我国相关行业、机构开展数据全生命周期中数据质量控制、数据产品开发及体系建立、数据管理及共享提供重要依据和参考。
