A Holistic Multi-domain Association Model for Railway Geographic and Geologic Data
Objectives:Facing the needs ofdigital twins for the whole life cycle of railway,the problems exist in independent expression,decentralized management and difficult in-depth integration of the continuously changing railway geographic and geologic data for a long time.Methods:This paper takes railway geo-graphic and geologic elements as an inseparable whole,and proposes an integrated expression model of the three-domain association for railway geographic and geologic data,which includes ontology domain,change domain and state domain.First,it takes spatial-temporal change as the center and defines the change participants(elements),drivers(events)and presentation modes(processes).Then,it defines a multi-level spatial-temporal change association relationship between state level,entity level and process level.Finally,it constructs a knowledge graph of railway geologic data with multi-domain association,and finely portrays the semantic association relationship between three aspects of geological elements,events and processes.Results and Conclusions:The importance and potential of the model in typical tunnel con-struction applications are analyzed.
railway geographic and geologic environmentrailway geographic and geologic datamulti-domain associationknowledge graphspatial-temporal change
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