The whole superconducting HT-7U Tokamak is a high-cost and large-scale complicated device. The assembly requirement of HT-7U device is arduous and strict. At present, there have been no guiding principle for the assem...The whole superconducting HT-7U Tokamak is a high-cost and large-scale complicated device. The assembly requirement of HT-7U device is arduous and strict. At present, there have been no guiding principle for the assembly of the device, but assembly simulation can help the engineer plan and make decision by an intuitional and visual way before its actual assembly. The problem is that which scheme is most suitable should be solved primarily. From current research situation and technology progress of assembly simulation, this paper explained and analyzed four kinds of technological schemes of assembly simulation in common use. Finally, we got the most feasible scheme that was suitable for HT-7U assembly simulation by comparing their technological issues and difficult points of simulation among the four kinds of feasible schemes.展开更多
To simulate the satellite launch mission under a general platform which could be used in a full-digital mode as well as in a semi-physical way, is an important way to certify the mission design performance as well as ...To simulate the satellite launch mission under a general platform which could be used in a full-digital mode as well as in a semi-physical way, is an important way to certify the mission design performance as well as technical feasibilities, and it relates to complex system simulation methods such as multi-disciplinary coupling, multi-language modeling as well as interactive simulation and virtual simulation technologies. This paper introduces the design of a digital simulation platform for satellite launch mission verification.The platform has the advantages of high generality and extensibility, being easy to build up. The Functional Mockup Interface(FMI) Standard is adopted to achieve integration of multi-source models. A WebGL based 3D visual simulation tool is also adopted to implement the virtual display system which could display the rocket launch process and rocket-satellite separation with high fidelity 3D virtual scenes. A configuration tool was developed to map the 3D objects in the visual scene with simulation physical variables for complex rocket flight control mechanisms, which greatly improves the platform's generality and extensibility. Finally the real-time performance had been tested and the YL-1 launch mission was adopted to demonstrate the functions of the platform.The platform will be used to construct a digital twin system for satellite launch missions in the future.展开更多
目的了解游戏化教学在护理教育中的应用现状及效果,为开展游戏化教学相关研究提供参考。方法根据范围综述的研究方法,计算机检索PubMed、Cochrane Library、Web of Science、Embase、CINAHL、中国知网、中国生物医学文献数据库、万方数...目的了解游戏化教学在护理教育中的应用现状及效果,为开展游戏化教学相关研究提供参考。方法根据范围综述的研究方法,计算机检索PubMed、Cochrane Library、Web of Science、Embase、CINAHL、中国知网、中国生物医学文献数据库、万方数据、维普网中有关游戏化教学在护理教育中应用的文献,检索时限为建库至2024年2月27日,并对文献进行筛选、汇总及分析。结果共纳入15篇文献,游戏化教学的主要类型包括传统游戏、虚拟仿真实践、情景模拟、角色扮演、数字化在线教育平台;游戏化教学在提升理论实践能力、综合素质及情感态度方面都呈现积极效果。但目前教学评价工具还未统一标准。结论游戏化教学在国内外护理教育的应用较广泛,其教学有效性得到了初步证实,但在游戏化教学资源的开发、评价系统及教学设计等方面还需要进一步的完善和优化。展开更多
Models for accurately simulating pesticide droplet deposition and transmission mechanism in rice canopies can provide an effective and economic tool to optimize methods for spraying pesticides,adjuvant formulation,and...Models for accurately simulating pesticide droplet deposition and transmission mechanism in rice canopies can provide an effective and economic tool to optimize methods for spraying pesticides,adjuvant formulation,and spray parameters.However,the current studies on the modeling of spray droplet deposition within rice plants are still very limited.Aiming at this problem,a method to model and visualize spray transmission and deposition within the canopy of rice plants was proposed.Firstly,a particle system was used to simulate the spraying scene of droplets.Then an improved method to determine the behavior of rebound and shatter of the droplets in the virtual scene was proposed.The deposition of spraying droplets on a leaf was calculated according to the inclination angles of the leaf,the characteristics of the leaf surface,and the physical and spatial characteristics of the droplets.The experiment shows that the method can simulate the behavior of the spraying droplets within a virtual scene of a rice plant,which may provide a reference for the study of spray deposition in the canopy of the crop.展开更多
基金National Nature Science Foundation of China(No.60273044)Nature Science Foundation of Anhui Province(No.01042201)
文摘The whole superconducting HT-7U Tokamak is a high-cost and large-scale complicated device. The assembly requirement of HT-7U device is arduous and strict. At present, there have been no guiding principle for the assembly of the device, but assembly simulation can help the engineer plan and make decision by an intuitional and visual way before its actual assembly. The problem is that which scheme is most suitable should be solved primarily. From current research situation and technology progress of assembly simulation, this paper explained and analyzed four kinds of technological schemes of assembly simulation in common use. Finally, we got the most feasible scheme that was suitable for HT-7U assembly simulation by comparing their technological issues and difficult points of simulation among the four kinds of feasible schemes.
文摘To simulate the satellite launch mission under a general platform which could be used in a full-digital mode as well as in a semi-physical way, is an important way to certify the mission design performance as well as technical feasibilities, and it relates to complex system simulation methods such as multi-disciplinary coupling, multi-language modeling as well as interactive simulation and virtual simulation technologies. This paper introduces the design of a digital simulation platform for satellite launch mission verification.The platform has the advantages of high generality and extensibility, being easy to build up. The Functional Mockup Interface(FMI) Standard is adopted to achieve integration of multi-source models. A WebGL based 3D visual simulation tool is also adopted to implement the virtual display system which could display the rocket launch process and rocket-satellite separation with high fidelity 3D virtual scenes. A configuration tool was developed to map the 3D objects in the visual scene with simulation physical variables for complex rocket flight control mechanisms, which greatly improves the platform's generality and extensibility. Finally the real-time performance had been tested and the YL-1 launch mission was adopted to demonstrate the functions of the platform.The platform will be used to construct a digital twin system for satellite launch missions in the future.
文摘目的了解游戏化教学在护理教育中的应用现状及效果,为开展游戏化教学相关研究提供参考。方法根据范围综述的研究方法,计算机检索PubMed、Cochrane Library、Web of Science、Embase、CINAHL、中国知网、中国生物医学文献数据库、万方数据、维普网中有关游戏化教学在护理教育中应用的文献,检索时限为建库至2024年2月27日,并对文献进行筛选、汇总及分析。结果共纳入15篇文献,游戏化教学的主要类型包括传统游戏、虚拟仿真实践、情景模拟、角色扮演、数字化在线教育平台;游戏化教学在提升理论实践能力、综合素质及情感态度方面都呈现积极效果。但目前教学评价工具还未统一标准。结论游戏化教学在国内外护理教育的应用较广泛,其教学有效性得到了初步证实,但在游戏化教学资源的开发、评价系统及教学设计等方面还需要进一步的完善和优化。
基金financially supported by the Open Project Program(Grant No.20210401)of the State Key Laboratory of Rice Biology of China National Rice Research InstituteZhejiang public welfare technology research plan/social development project(LGF21F020015)the National Natural Science Foundations of China(Grant No.31471416).
文摘Models for accurately simulating pesticide droplet deposition and transmission mechanism in rice canopies can provide an effective and economic tool to optimize methods for spraying pesticides,adjuvant formulation,and spray parameters.However,the current studies on the modeling of spray droplet deposition within rice plants are still very limited.Aiming at this problem,a method to model and visualize spray transmission and deposition within the canopy of rice plants was proposed.Firstly,a particle system was used to simulate the spraying scene of droplets.Then an improved method to determine the behavior of rebound and shatter of the droplets in the virtual scene was proposed.The deposition of spraying droplets on a leaf was calculated according to the inclination angles of the leaf,the characteristics of the leaf surface,and the physical and spatial characteristics of the droplets.The experiment shows that the method can simulate the behavior of the spraying droplets within a virtual scene of a rice plant,which may provide a reference for the study of spray deposition in the canopy of the crop.
