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Top1. Introduction
Virtual reality (VR) technology was first proposed by Jaron Lanier in the early 1990s (Firth 2013). Since then, VR technology has been valued by various industries and gradually developed into a complete discipline. Virtual reality technology utilizes computer graphics (Aristidou 2018, Jarabo 2017), artificial intelligence (L'opez 2020, Miller 2019) to reproduce the real world, and simulates human interaction experience in the virtual environment through language, gestures, senses etc. with the help of various sensors to make human have the sense of immersive.
The VR technology has three characteristics: immersion, interaction and imagination. It can be divided into distributed virtual reality system, desktop virtual reality system, augmented reality system and immersive virtual reality system. Virtual reality technology has made great progress in various fields since its establishment. It has been applied in many fields, such as aerospace (Tadeja 2020, Shi 2020), communication (Stadler 2019, Warburton 2019), transportation (Zhu 2020, Kreimeier 2020), military (Ahir 2019, Gače 2019), industry (Roldán 2019, Salah 2019), medical treatment (Ren 2021), education (Dean 2020, Yamakawa 2020), and entertainment (Olanda 2006, Kodama 2017). The virtual reality has attracted wide attention all over the world and plays a significant role in promoting related fields.