关键词： Pulmonary atresia   3D-printed heart model   Virtual reality   Mixed reality   Surgical outcomes  

摘要： Background Single-stage unifocalisation for pulmonary atresia (PA) with ventricular septal defect (VSD) and major aortopulmonary collateral arteries (MAPCA) requires a high degree of three-dimensional (3D) anatomical imagination. A previous study has reported the application of a 3D-printed heart model with virtual reality (VR) or mixed reality (MR). However, few studies have evaluated the surgical outcomes of the 3D model with VR or MR in PA/VSD patients. Methods Three-dimensional (3D) heart models of five selected PA/VSD patients were derived from traditional imageology of their hearts. Using VR glasses, the 3D models were also visualised in the operating room. Both the 3D-printed heart models and preoperative evaluation by VR were used in the five selected patients for surgical simulation and better anatomical understanding. Mixed reality holograms were used as perioperative assistive tools. Surgical outcomes were assessed, including in-hospital and early follow-up clinical data. Results The use of these three new technologies had favourable feedback from the surgeons on intraoperative judgment. There were no in-hospital or early deaths. No reintervention was required until the last followup. Three (3) patients developed postoperative complications: one had right bundle branch block and ST segment change, one had chest drainage >7 days (>40 mL/day) and one had pneumonia. Conclusion The preoperative application of a 3D-printed heart model with VR or MR helped in aligning the surgical field. These technologies improved the understanding of complicated cardiac anatomy and achieved acceptable surgical outcomes as guiding surgical planning.

关键词： Robot Assistance   VR Technology   CS Patients   Motor Function   Nerve Function  

摘要： To investigate the effects of robot-assisted (RA) virtual reality (VR) intervention on motor function (MF) and nerve function (NF) in patients with cerebral stroke (CS), 60 patients with cerebral apoplexy hemiplegia in convalescence stage were randomly divided into conventional group (CG) and experimental group (EG) (30 patients in each group). The CG received routine rehabilitation training (RT), and the EG used robot VR technology for RT. Brunnstrom classification and Fugl-meyer score were used to evaluate upper limb (UL) function. Maslach Burnout Inventory (MBI) and Motor Activity Scale (MAL) were used to evaluate the activity ability of patients. NF was assessed using the neurological impairment (NI) scale and the incidence of sleep disorders within a month. The recurrence rate of CS and the incidence of vascular cognitive impairment (VCI) within one month were calculated to evaluate the impact of RA rehabilitation on the disease of the patients. The results showed that both groups of patients were able to actively cooperate with doctors and complete the daily training volume. The score of Fugl-meyer in both groups was greatly higher than that before treatment (P < 0.05), and the Brunnstrom score in the EG was greatly higher than that in the CG (P < 0.05). The MBI and MAL grades were greatly higher than those before treatment (P < 0.05), and the EG was greatly higher than the CG (P < 0.05). The scale of NI score of the EG was greatly lower than that of the CG (P < 0.05). The rate of sleep disturbance in the EG was greatly lower than that in the CG ( P < 0.05). The incidence of CS recurrence and VCI in the EG was greatly lower than that in the CG ( P < 0.05), which shows that RAVR technology combined with psychological intervention can effectively improve the MF and NF of patients with CS and reduce the recurrence rate of patients, which provides experimental data for clinical rehabilitation treatment of CS.

关键词： Submarines  

摘要： With the advancement and augmented reality innovation, its applications are getting increasingly far-reaching. The 3D show innovation appropriate to this work is the checking of submarine pipelines. It is a basic database "submarine pipeline" that reconstructs the submarine pipeline, shows a PC in a virtual scene of the submarine pipeline dependent on augmented reality, and encompasses submarine topography displays related data. And associated terrain and landscape integrated database engine "using rendering with 3D graphics Surveillance and collection of submarine pipelines. Similarly, mappings can mainly use their derivatives in 2D map views with GIS software digital elevation models (such as tilt or shadow grids). As a result, submarine research lacks an on-site research phase of classic works on land, allowing clear visualization and appreciation of the study subject. Development of traditional educational theories based on FPGAs and neural networks (NN). A summary of your experience when taught. In reality, it's easy to find a universal educational model. © 2020

关键词： Field programmable gate arrays (FPGA)  

摘要： The underground plaza is a place of leisure activities for citizens, represents the quality of the city's underground space, experience, so the space is significant. The present study of the ten large-scale urban underground space of the study summarized the essential elements and the underground plaza of the corresponding numerical interval's interface form. It describes the interface format's spatial experience of influence an underground plaza;on this basis, the underground plaza virtual model is built in a different interface format. The isovist method and the SD method to comb the Immersive Virtual Reality System (IVRS) platform, the shape of the interface and spatial experience, and the correlation between the related compliance indicators proposed interface form are quantitative analysis. It is summarized. Experimental results, spatial experience have indicated better at 0.402 interface density and interface 2–3 aperture aspect ratio. This is, it can become a reference and basis for the future of urban underground space design. © 2020

关键词： Merging conflicts   Virtual reality   Traffic micro-simulation   Safety analysis  

摘要： Introduction: This research aims to investigate the perceptions and reactions of drivers regarding freeway merging situation, utilizing a new approach with the basis of a multilevel simulation platform which incorporates virtual reality (VR) technology. Methods: A VR driving environment integrated with traffic micro-simulation was developed to evaluate driving behaviors and the impact of merging decisions in terms of traffic conflicts. The driving experiments were conducted under a variety of circumstances, including varying traffic flows and the presence of ramp metering. The Surrogate Safety Assessment Model (SSAM) was utilized to extract the number of conflicts from the micro-simulation results. Results: The final results indicated that the probability of conflict has a positive correlation with traffic flow, while conflict frequency at freeway merges is affected by the presence of ramp metering due to its potentiality to enhance driver decisions and reduce the drivers' pressure when they make maneuvers. Practical Applications: The findings reveal that the proposed VR simulation platform is a useful tool to improve the safety of freeway merging. It has the potential to enhance driver skills and can also be used in the study of human-machine interaction. (C) 2020 National Safety Council and Elsevier Ltd. All rights reserved.

关键词： 虚拟现实技术   汽修   信息化  

摘要： 现如今,科学技术的发展日新月异并且在各个行业中都对其行业的发展起到了重要的推动作用,而这其中虚拟现实技术在汽修专业教学中的运用使得教学过程中的理论讲解与实践过程得到了更加高质量的衔接,并且很好的弥补了以往实训设备较少、实训场地受限等不足,使得教学的质量以及学生学习的效率得到了大幅度的提高。所以本文则将对汽修专业教学现状以及将虚拟现实技术运用到汽修教学中的意义进行一定的分析,并对虚拟现实技术在汽修专业信息化教学中的实际运用进行一定的探讨,希望能够为虚拟现实技术在汽修专业教学中的积极作用的充分发挥产生积极的影响。