知识图谱作为当前最有效的知识组织和服务方式,已经成为人工智能的基石,在语义搜索、机器翻译、信息推荐等方面得到了广泛的应用。大数据时代下,地球科学(以下简称地学)分散、多源、异构数据的整合集成、挖掘分析及其知识的智能发现等...知识图谱作为当前最有效的知识组织和服务方式,已经成为人工智能的基石,在语义搜索、机器翻译、信息推荐等方面得到了广泛的应用。大数据时代下,地球科学(以下简称地学)分散、多源、异构数据的整合集成、挖掘分析及其知识的智能发现等迫切需要知识图谱的支撑。为了促进地学知识图谱的建设与应用,自2019年启动以来,“深时数字地球国际大科学计划”(Deep-time Digital Earth,简称DDE)就将知识图谱作为其重要的研究建设内容,经过3年多的建设,DDE已经建设形成了大量的地学知识图谱,亟需一站式共享这些知识图谱。文章首先介绍了DDE知识图谱内容体系,分析了DDE知识图谱内容组成及其特征;在此基础上,开展了地学知识图谱一站式共享服务系统的设计,包括系统功能体系和架构的设计;最后介绍了系统实现的技术路线及其关键技术。实践证明系统可有效实现DDE知识图谱的一站式共享服务,可为类似的知识共享服务系统提供参考。展开更多
The problem of differentiated Multi-Layer Integrated Survivability (MLIS) in IP over WDM networks is studied, which is decomposed into three sub-problems: survivable strategies design (SSD), spare capacity dimensionin...The problem of differentiated Multi-Layer Integrated Survivability (MLIS) in IP over WDM networks is studied, which is decomposed into three sub-problems: survivable strategies design (SSD), spare capacity dimensioning (SCID), and dynamic survivable routing (DSR). A related work of network survivability in IP over WDM networks is firstly provided, and adaptive survivable strategies are also designed. A new Integrated Shared Pool (ISP) approach for SCD is then proposed, which is formulated by using integer-programming theory. Moreover, a novel survivable routing scheme called Differentiated Integrated Survivability Algorithm (DISA) for DSR is developed. Simulation results show that the proposed integrated survivability scheme performs much better than other solutions (e,g., 'highest layer recovery' and 'lowest layer recovery' schemes) in terms of traffic blocking ratio, spare resource requirement, and average traffic recovery ratio in IP over WDM networks.展开更多
文摘知识图谱作为当前最有效的知识组织和服务方式,已经成为人工智能的基石,在语义搜索、机器翻译、信息推荐等方面得到了广泛的应用。大数据时代下,地球科学(以下简称地学)分散、多源、异构数据的整合集成、挖掘分析及其知识的智能发现等迫切需要知识图谱的支撑。为了促进地学知识图谱的建设与应用,自2019年启动以来,“深时数字地球国际大科学计划”(Deep-time Digital Earth,简称DDE)就将知识图谱作为其重要的研究建设内容,经过3年多的建设,DDE已经建设形成了大量的地学知识图谱,亟需一站式共享这些知识图谱。文章首先介绍了DDE知识图谱内容体系,分析了DDE知识图谱内容组成及其特征;在此基础上,开展了地学知识图谱一站式共享服务系统的设计,包括系统功能体系和架构的设计;最后介绍了系统实现的技术路线及其关键技术。实践证明系统可有效实现DDE知识图谱的一站式共享服务,可为类似的知识共享服务系统提供参考。
文摘The problem of differentiated Multi-Layer Integrated Survivability (MLIS) in IP over WDM networks is studied, which is decomposed into three sub-problems: survivable strategies design (SSD), spare capacity dimensioning (SCID), and dynamic survivable routing (DSR). A related work of network survivability in IP over WDM networks is firstly provided, and adaptive survivable strategies are also designed. A new Integrated Shared Pool (ISP) approach for SCD is then proposed, which is formulated by using integer-programming theory. Moreover, a novel survivable routing scheme called Differentiated Integrated Survivability Algorithm (DISA) for DSR is developed. Simulation results show that the proposed integrated survivability scheme performs much better than other solutions (e,g., 'highest layer recovery' and 'lowest layer recovery' schemes) in terms of traffic blocking ratio, spare resource requirement, and average traffic recovery ratio in IP over WDM networks.
