Universal Digital Twin - A Dynamic Knowledge Graph
Universal Digital Twin - A Dynamic Knowledge Graph
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DOI：
10.1017/dce.2021.10
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发表时间：
2021-01-01
期刊：
影响因子：
--
通讯作者：
Kraft, Markus
中科院分区：
文献类型：
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作者：
Akroyd, Jethro;Mosbach, Sebastian;Kraft, Markus
本文介绍了一种用于数字双胞胎的动态知识图方法，并说明了这种方法是如何通过设计自然地适合实现通用数字双胞胎的愿景的。动态知识图是使用来自语义网的技术实现的。它由使用本体定义的概念和实例以及对概念和实例进行操作以更新动态知识图的计算代理组成。通过构建，它是分布式的，支持跨域互操作性，并确保数据通过统一接口连接、可移植、可发现和可查询。知识图谱包括描述真实世界并由合并实时数据的代理维护的“基本世界”的概念，以及支持在不影响基本世界的情况下智能探索替代设计的“并行世界”的概念。提供的用例展示了动态知识图托管地理空间和化学数据、控制化学实验、执行跨域模拟和执行情景分析的能力。讨论了如何为备选方案提出明智的建议，以及如何确保知识图谱所考虑的方案与社会目标保持一致。讨论了扩展动态知识图谱的工作，以开发英国的数字孪生兄弟，以支持能源系统的脱碳。指出了今后研究的重要方向。
This paper introduces a dynamic knowledge-graph approach for digital twins and illustrates how this approach is by design naturally suited to realizing the vision of a Universal Digital Twin. The dynamic knowledge graph is implemented using technologies from the Semantic Web. It is composed of concepts and instances that are defined using ontologies, and of computational agents that operate on both the concepts and instances to update the dynamic knowledge graph. By construction, it is distributed, supports cross-domain interoperability, and ensures that data are connected, portable, discoverable, and queryable via a uniform interface. The knowledge graph includes the notions of a "base world" that describes the real world and that is maintained by agents that incorporate real-time data, and of "parallel worlds" that support the intelligent exploration of alternative designs without affecting the base world. Use cases are presented that demonstrate the ability of the dynamic knowledge graph to host geospatial and chemical data, control chemistry experiments, perform cross-domain simulations, and perform scenario analysis. The questions of how to make intelligent suggestions for alternative scenarios and how to ensure alignment between the scenarios considered by the knowledge graph and the goals of society are considered. Work to extend the dynamic knowledge graph to develop a digital twin of the UK to support the decarbonization of the energy system is discussed. Important directions for future research are highlighted.