Construction of Space Object Situation Information Service Based on Knowledge Graph

Abstract

To effectively guarantee the safety and efficiency of space activities, and to meet the needs of different levels of users for space object situation (SOS) knowledge, formalized and standardized SOS knowledge is needed to assist cognition. A knowledge graph (KG), as a suitable technology that can formally express knowledge and construct a standardized knowledge base, can provide knowledge generation, representation and intelligent service of SOS. In this paper, an SOS information service based on the KG (SOSKG) was constructed. Aimed at different scales of components in SOS, a multi-granularity knowledge structure was constructed, and a formalized expression of SOSKG was realized. To incorporate the complex relations into the SOSKG, a multi-level semantic relation parsing model and formalized representation were proposed from the three aspects of basic relations, spatial relations, and temporal relations. Additionally, a multielement knowledge construction model was constructed to address the dynamic characteristics of various relations in SOSKG under a complex spatio-temporal environment. This study constructed different cases and scenarios to test the service, and the results show that the proposed service can effectively organize and express SOS knowledge in a complex spatio-temporal environment, provide an intermediate bridge between users and SOS knowledge, and promote users' cognition of SOS knowledge.

Swarm Differential Privacy for Purpose-Driven Data-Information-Knowledge-Wisdom Architecture

“…erefore, in recent years, researchers proposed the Data-Information-Knowledge-Wisdom (DIKW) [7][8][9][10][11] architecture to separate the collected data into multiple modals of DIKW. A data modal and information modal contain specific data and information such as weather temperature, time, web service [12], biological resource [13], and location [14], whilst other DIKW modals contain further semantics and abstractive characteristics.…”

Swarm Differential Privacy for Purpose Driven Data-Information-Knowledge-Wisdom Architecture

“…Therefore, in recent years, researchers proposed the Data-Information-Knowledge-Wisdom (DIKW) [6] [39] [54] [11] [12] architecture to separate the collected data into multiple modals of DIKW. A data modal and information modal contain specific data and information such as weather temperature, time, web service [13], biological resource [14] and location [15], whilst other DIKW modals contain further semantics and abstractive characteristics.…”