To explore the influence of emergency evacuation signs on passenger behavior during subway fires and improve evacuation efficiency in emergencies,this paper proposes a dynamic emergency evacuation sign system.A simula...To explore the influence of emergency evacuation signs on passenger behavior during subway fires and improve evacuation efficiency in emergencies,this paper proposes a dynamic emergency evacuation sign system.A simulation platform integrating building information modeling(BIM)and virtual reality(VR)technologies was em-ployed to create subway fire evacuation scenarios using both the current and proposed dynamic emergency evacuation signage systems.Through simulation experiments,fine-grained microscopic data on passenger behavior was collected.Seven indicators were selected to assess evacuation efficiency and wayfinding difficulty.The analysis explored the influence of evacuation signs on passenger behavior in both overall and decision-making areas,thereby validating the effectiveness of the new emergency evacuation signage system.The results show that the dynamic evacuation signage system significantly improves overall passenger evacuation efficiency and reduces decision-making errors.It also improves wayfinding efficiency in critical decision areas by reducing the need for direction identification,minimizing stopping times,and lowering the frequency of decision errors.The method for evaluating the effects of emergency evacuation signs on passenger evacuation behavior proposed in this study provides a robust theoretical basis for the design and optimization of emergency-oriented signs.展开更多
Under the background of“emerging engineering education,”the engineering education with national defense characteristics,has put forward higher requirements for the engineering practice training of college students.B...Under the background of“emerging engineering education,”the engineering education with national defense characteristics,has put forward higher requirements for the engineering practice training of college students.Based on this,focusing on three characteristics of virtual reality(VR)technology,this paper puts forward the construction ideas of VR technology applied in engineering practice training courses.Then,by taking Northwestern Polytechnical University’s“VR Assembly Composite Practice Training Course”for example,this paper designs the teaching process of the practice training course and analyzes the teaching effect through questionnaires.It finds that VR technology can avoid teaching risks,improve teaching quality,and have a high promotion value in the existing engineering practice training courses.Finally,three suggestions on the VR technology applied in engineering practice teaching are put forward.展开更多
1.INTRODUCTION The rapid advancement of augmented reality(AR)and virtual reality(VR)technologies has stimulated substantial innovation in the display industry,particularly in front-panel technology advancements.To pro...1.INTRODUCTION The rapid advancement of augmented reality(AR)and virtual reality(VR)technologies has stimulated substantial innovation in the display industry,particularly in front-panel technology advancements.To provide immersive and high-quality contents in AR/VR devices,displays must support a wide color gamut that reproduces vivid colors.Ideally,such displays should satisfy the rigorous requirements of the Rec.2020 standard,which defines the color space for ultrahigh-definition television.1 Therefore,next-generation displays demand the convergence of high color purity,high-resolution,and high device performance(Figure 1A).展开更多
基金Beijing Natural Science Foundation-Fengtai Rail Transit Frontier Research Joint Foundation(No.L211024),the National Natural Science Foundation of China(No.52072012).
文摘To explore the influence of emergency evacuation signs on passenger behavior during subway fires and improve evacuation efficiency in emergencies,this paper proposes a dynamic emergency evacuation sign system.A simulation platform integrating building information modeling(BIM)and virtual reality(VR)technologies was em-ployed to create subway fire evacuation scenarios using both the current and proposed dynamic emergency evacuation signage systems.Through simulation experiments,fine-grained microscopic data on passenger behavior was collected.Seven indicators were selected to assess evacuation efficiency and wayfinding difficulty.The analysis explored the influence of evacuation signs on passenger behavior in both overall and decision-making areas,thereby validating the effectiveness of the new emergency evacuation signage system.The results show that the dynamic evacuation signage system significantly improves overall passenger evacuation efficiency and reduces decision-making errors.It also improves wayfinding efficiency in critical decision areas by reducing the need for direction identification,minimizing stopping times,and lowering the frequency of decision errors.The method for evaluating the effects of emergency evacuation signs on passenger evacuation behavior proposed in this study provides a robust theoretical basis for the design and optimization of emergency-oriented signs.
文摘Under the background of“emerging engineering education,”the engineering education with national defense characteristics,has put forward higher requirements for the engineering practice training of college students.Based on this,focusing on three characteristics of virtual reality(VR)technology,this paper puts forward the construction ideas of VR technology applied in engineering practice training courses.Then,by taking Northwestern Polytechnical University’s“VR Assembly Composite Practice Training Course”for example,this paper designs the teaching process of the practice training course and analyzes the teaching effect through questionnaires.It finds that VR technology can avoid teaching risks,improve teaching quality,and have a high promotion value in the existing engineering practice training courses.Finally,three suggestions on the VR technology applied in engineering practice teaching are put forward.
基金supported by National Research Foundation of Korea(NRF)grants funded by the Ministry of Science and ICT,Korea:RS-2022-NR068226(2022M3H4A1A04096380)and RS-2024-00416583.
文摘1.INTRODUCTION The rapid advancement of augmented reality(AR)and virtual reality(VR)technologies has stimulated substantial innovation in the display industry,particularly in front-panel technology advancements.To provide immersive and high-quality contents in AR/VR devices,displays must support a wide color gamut that reproduces vivid colors.Ideally,such displays should satisfy the rigorous requirements of the Rec.2020 standard,which defines the color space for ultrahigh-definition television.1 Therefore,next-generation displays demand the convergence of high color purity,high-resolution,and high device performance(Figure 1A).
