面向文本描述的CPS资源能力知识图谱构建方法
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沈立炜,shenliwei@fudan.edu.cn

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上海市级科技重大专项资助(2021SHZDZX0100)


Text-oriented Construction Method for CPS Resource Capability Knowledge Graph
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    摘要:

    信息物理融合系统(Cyber-Physical System,简称CPS)在社会生活中发挥越来越广泛的作用.CPS资源的按需编排建立在CPS资源的软件定义基础上,软件接口的定义则依赖对CPS资源能力的充分描述.目前,CPS领域内缺少一个能规范表示资源及其能力的知识库和构建该知识库的有效方法.面向CPS资源的文本描述,本文提出构建CPS资源能力知识图谱并设计一种自底向上的自动构建方法.给定资源,方法先从其代码和文档中提取资源能力的文本描述信息,并基于预定义的表示模式生成规范化表示的能力短语.然后,基于动宾结构的关键成分对能力短语进行划分、聚合与抽象,生成不同类型资源的能力层次化抽象描述.最后,构建资源能力知识图谱.面向Home Assistant平台,本文构建了包含32个资源类别、957个资源能力的知识图谱.图谱构建实验从不同维度对比分析了手工构建和本文方法自动构建的结果.实验表明,本文为CPS资源能力知识图谱的自动化构建提供可行途径,有助于减少人工构建工作量,补充CPS领域内资源服务与能力的描述,并提高图谱的知识完备性.

    Abstract:

    Cyber-physical System (CPS) plays an increasingly important role in social life. The on-demand choreography of CPS resources is based on the software defining of CPS resources. The definition of software interfaces depends on the full description for the capabilities of CPS resources. At present, in the CPS field, there is a lack of a knowledge base that can describe resources and their capabilities, and a lack of an effective way to construct the knowledge base. For the text description of CPS resources, this study proposes to construct the CPS resource capability knowledge graph and designs a bottom-up automatic construction method. Given CPS resources, this method first extracts textual descriptions of the resources' capabilities from code and texts, and generates a normalized expression of capability phrases based on a predefined representation pattern. Then, capability phrases are divided, aggregated and abstracted based on the key components of the verb-object structure to generate the hierarchical abstract description of capabilities for different categories of resources. Finally, the CPS knowledge graph is constructed. Based on the Home Assistant platform, this study constructs a knowledge graph containing 32 resource categories and 957 resource capabilities. In the construction experiment, the results of manual construction and automatic construction using the proposed method are compared and analyzed from different dimensions. Experimental results show that this study provides a feasible method for automatic construction of CPS Resource Capability Knowledge Graph. This method helps to reduce the workload of artificial construction, supplement the description of resource services and capabilities in the CPS field and improves the knowledge completeness.

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李正洁,沈立炜,李弋,彭鑫.面向文本描述的CPS资源能力知识图谱构建方法.软件学报,,():0

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  • 收稿日期:2021-02-25
  • 最后修改日期:2021-05-17
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  • 在线发布日期: 2021-08-02
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