Computer-based conceptual design for routine design has made great strides, yet non-routine design has not been given due attention, and it is still poorly automated. Considering that the function-behavior-structure（...Computer-based conceptual design for routine design has made great strides, yet non-routine design has not been given due attention, and it is still poorly automated. Considering that the function-behavior-structure（FBS） model is widely used for modeling the conceptual design process, a computer-based creativity enhanced conceptual design model（CECD） for non-routine design of mechanical systems is presented. In the model, the leaf functions in the FBS model are decomposed into and represented with fine-grain basic operation actions（BOA）, and the corresponding BOA set in the function domain is then constructed. Choosing building blocks from the database, and expressing their multiple functions with BOAs, the BOA set in the structure domain is formed. Through rule-based dynamic partition of the BOA set in the function domain, many variants of regenerated functional schemes are generated. For enhancing the capability to introduce new design variables into the conceptual design process, and dig out more innovative physical structure schemes, the indirect function-structure matching strategy based on reconstructing the combined structure schemes is adopted. By adjusting the tightness of the partition rules and the granularity of the divided BOA subsets, and making full use of the main function and secondary functions of each basic structure in the process of reconstructing of the physical structures, new design variables and variants are introduced into the physical structure scheme reconstructing process, and a great number of simpler physical structure schemes to accomplish the overall function organically are figured out. The creativity enhanced conceptual design model presented has a dominant capability in introducing new deign variables in function domain and digging out simpler physical structures to accomplish the overall function, therefore it can be utilized to solve non-routine conceptual design problem.展开更多
Background Over the last few years,the rapid advancement of technology has led to the development of many approaches to digitalization.In this respect,metaverse provides 3D persistent virtual environments that can be ...Background Over the last few years,the rapid advancement of technology has led to the development of many approaches to digitalization.In this respect,metaverse provides 3D persistent virtual environments that can be used to access digital content,meet virtually,and perform several professional and leisure tasks.Among the numerous technologies supporting the metaverse,immersive Virtual Reality(VR)plays a primary role and offers highly interactive social experiences.Despite growing interest in this area,there are no clear design guidelines for creating environments tailored to the metaverse.Methods This study seeks to advance research in this area by moving from state-of-the-art studies on the design of immersive virtual environments in the context of metaverse and proposing how to integrate cutting-edge technologies within this context.Specifically,the best practices were identified by i)analyzing literature studies focused on human behavior in immersive virtual environments,ii)extracting common features of existing social VR platforms,and iii)conducting interviews with experts in a specific application domain.Specifically,this study considered the creation of a new virtual environment for MetaLibrary,a VR-based social platform aimed at integrating public libraries into metaverse.Several implementation challenges and additional requirements have been identified for the development of virtual environments(VEs).These elements were considered in the selection of specific cutting-edge technologies and their integration into the development process.A user study was also conducted to investigate some design aspects(namely lighting conditions and richness of the scene layout)for which deriving clear indications from the above analysis was not possible because different alternative configurations could be chosen.Results The work reported in this paper seeks to bridge the gap between existing VR platforms and related literature in the field,on the one hand,and requirements regarding immersive virtual environments for the metaverse,on the other hand,by reporting a set of best practices which were used to build a social virtual environment that meets users'expectations and needs.Conclusions Results suggest that carefully designed virtual environments can positively affect user experience and interaction within metaverse.The insights gained from this study offer valuable cues for developing immersive virtual environments for the metaverse to deliver more effective and engaging experiences.展开更多
The early involvement of test and evaluation can significantly reduce the cost of modifying issues and errors found in the later stages of aircraft development and design process.This paper presents a methodology for ...The early involvement of test and evaluation can significantly reduce the cost of modifying issues and errors found in the later stages of aircraft development and design process.This paper presents a methodology for aircraft mission effectiveness evaluation and design space exploration based on Virtual Operational Test(VOT),incorporating Virtual Open Scenario(VOS)and User in Scenarios(UIS)concepts.By employing modeling and simulation technologies in the early stages of aircraft development and design,a virtual environment can be constructed,allowing aircraft users to participate more closely and conveniently in the design process.Virtual tests conducted by users within the mission context provide data on mission effectiveness and critical user feedback.This paper outlines the main components of the virtual operational test process and related conceptual methods,and discusses an open support system framework that supports VOT.The effectiveness and adaptability of the method are demonstrated through two case studies:a beyond-visual-range air combat scenario and a helicopter ground attack scenario.These case studies demonstrate the evaluation of aircraft mission effectiveness and the sensitivity analysis and optimization of design and operational parameters based on VOT.展开更多
Addressing limitations such as the lack of immersion and difficulties in comprehensively evaluating design schemes in traditional teaching models of environmental design courses,this study explores teaching reforms us...Addressing limitations such as the lack of immersion and difficulties in comprehensively evaluating design schemes in traditional teaching models of environmental design courses,this study explores teaching reforms using virtual simulation technology.An immersive virtual teaching environment was constructed,integrating virtual simulation technology gradually into the teaching process,with practical teaching cases used to assess the effectiveness of these reforms.Results demonstrate that virtual simulation technology significantly enhances students’spatial understanding and design expression abilities,while also improving teaching interactivity and student engagement.This reform aligns with the trend towards digital design,offering innovative ideas and methodologies for teaching environmental design courses.展开更多
To investigate the application of virtual digital technology in landscape engineering design,the study adopted the enu-meration survey method and observation method.It conducted a comprehensive analysis of the current...To investigate the application of virtual digital technology in landscape engineering design,the study adopted the enu-meration survey method and observation method.It conducted a comprehensive analysis of the current status and existing chal-lenges of virtual digital technology in landscape engineering design.Additionally,the study provided a detailed description and explanation of the integration between virtual digital technology and landscape engineering design,while exploring its charac-teristics and application prospects.The findings revealed:(1)In the early design stage,technological integration enhanced design efficiency.The collaborative use of BIM,GIS,and parametric tools enabled a fully digital workflow from conceptual design to construction drawings,reducing design errors and shortening project timelines.(2)After implementation,interactive experiences revolutionized public engagement.AR/VR technologies introduced dynamic interactivity to landscapes,while metaverse plat-forms expanded the presentation dimensions of virtual landscapes.(3)Smart maintenance promoted sustainability.IoT sensors and AI analytics facilitated real-time plant health monitoring and precise resource management,demonstrating significant advan-tages.The study identified existing limitations and proposed future directions,aiming to provide new theoretical and practical insights for the research and application of digital technology in landscape engineering design.展开更多
This paper mainly discusses the perioperative nursing course teaching model suitable for higher vocational education.The core content of“perioperative nursing”course is set according to surgical nursing posts,and ga...This paper mainly discusses the perioperative nursing course teaching model suitable for higher vocational education.The core content of“perioperative nursing”course is set according to surgical nursing posts,and gamified course objectives are designed according to learners’cognitive rules.Typical nursing tasks are used as the carrier,teaching case base is formed based on the concept of medical and educational collaboration,and gamified teaching situations are created based on VR technology to optimize the teaching process and enable students to experience the learning process immersive.Enhance students’job competency and professional competence.In the course design,modular teaching,project teaching,team cooperation teaching,gamification teaching,VR immersive teaching,medical teaching collaborative evaluation and other modes are aggregated,and the course design of perioperative nursing is re-carried out.展开更多
Objectives:Emotional stress is a significant public health challenge.Virtual reality(VR)offers the potential for aiding emotional recovery.This study explores the impact of VR environment design factors on emotional r...Objectives:Emotional stress is a significant public health challenge.Virtual reality(VR)offers the potential for aiding emotional recovery.This study explores the impact of VR environment design factors on emotional recovery,examining underlying mechanisms through physiological indicators and behavioral responses.Methods:Two experimentswere conducted.Experiment 1 employed a 4[Scene Type:real environment(RE),virtual scenes that restore the RE(VR),virtual scenes that incorporate natural window view design(VR-W),and a no-scene control condition(CTL)]×3(Experimental Phase:baseline,emotion arousal,recovery)mixed design(N=33).Participants viewed a 4-min anxiety-inducing video followed by a 3-min scene exposure.State-Trait Anxiety Inventory-State Form(STAIS),galvanic skin response(GSR),and blood-volume pulse(BVP)frequency were analyzed with linear mixed-effects models.Experiment 2 used a 3(Motion-control mode:Unnatural,Semi-natural,Natural)×2(Sound form:Spatial positioning,Surround)×3(Experimental Phase:baseline,emotion arousal,recovery)mixed design(N=42).Presence was analyzed with the Scheirer–Ray–Hare test;phase efficacy was verified with Friedman tests.Results:Experiment 1 showed significant Scene Type×Experimental Phase interactions for GSR(F=8.006,p<0.001,η^(2)_(p)=0.624)and BVP frequency(F=11.491,p<0.001,η^(2)_(p)=0.704).VR-Wproduced the largest recovery(ΔGSR=–1.26;ΔBVP=–5.80;Hedges g≥0.83)vs.RE and VR.STAI-S returned to baseline across all Scene Types.Experiment 2 revealedmain effects of Motion-control mode(F=8.55,p=0.001,η^(2)_(p)=0.32)and Sound form(F=4.35,p=0.044,η^(2)_(p)=0.11)on Presence(Semi-natural+Spatial positioning highest).The greatest physiological recovery occurred with the UnnaturalMotioncontrolmode(GSRH=20.17,p<0.001,ε^(2)=0.49;BVPH=7.92,p=0.019),amplified by Spatial positioning Sound form only in this mode.Design factors did not influence STAI-S change.Conclusions:VR scenes are as restorative as RE;embedding VR-W accelerates recovery.Maximal Presence is not essential:Unnatural Motion-control mode induced the largest physiological recovery,especially combined with Spatial positioning Sound form.展开更多
According to the morphological structure characteristics of plants, the de- velopment mode for component-based virtual plants software was put forward, and the internal structure of plant organs component under this m...According to the morphological structure characteristics of plants, the de- velopment mode for component-based virtual plants software was put forward, and the internal structure of plant organs component under this mode were analyzed, thereby, the overall design mode for virtual plants software was given out, and its characteristics were estimated. Compared with traditional development modes of virtual plants software, component-based virtual plants software had significant advantages in code reusing, development efficiency and expansion of software functions.展开更多
In order to take requirements for commercial operations or military missions into better consideration in new flight vehicle design, a tri-hierarchical task classification model of ＂design for operation＂ is proposed...In order to take requirements for commercial operations or military missions into better consideration in new flight vehicle design, a tri-hierarchical task classification model of ＂design for operation＂ is proposed, which takes basic man-object interaction task, complex collaborative operation and large-scale joint operation into account. The corresponding general architecture of evaluation criteria is also depicted. Then a virtual simulation-based approach to implement the evaluations at three hierarchy levels is mainly analyzed with a detailed example, which validates the feasibility and effectiveness of evaluation architecture. Finally, extending the virtual simulation architecture from design to operation training is discussed.展开更多
Using virtual reality to design a new type of hydraulic support is discussed.That is how to make use of the virtual design to develop coal mining machine in practice. Theadvantages of virtual design are studied and th...Using virtual reality to design a new type of hydraulic support is discussed.That is how to make use of the virtual design to develop coal mining machine in practice. Theadvantages of virtual design are studied and the simple virtual reality system is built. The 3Dparts and elements of hydraulic support are modeled with parametric design in CAD software, thenexported to VR environment, in which the virtual hydraulic support is assembled, operated andtested. With the method, the errors and faults of design can be fined easily, many improvements aremade and the new hydraulic support is developed successfully.展开更多
This paper reports results of the authors’ studies on the virtual design method used in the development of low noise intake system of I.C. engine. The resulting high pass-by noise at level above the legislative targe...This paper reports results of the authors’ studies on the virtual design method used in the development of low noise intake system of I.C. engine. The resulting high pass-by noise at level above the legislative target at full throttle when engine speed was around 5200 r/min necessitated a BEM-aided redesign task, following the typical process of design and development of an intake system. During the initial design, based on the acoustic theory and the requirements (1. The air flux of the redesigned should equal to or exceed the value of the original flux; 2. The filtering area must not be degraded), and considering the constraint of space in the engine compartment, total volume and rough internal dimensions were determined. During the detailed design, the exact internal dimensions of the air cleaner were determined, and an effective method was applied to improve the acoustic performance at low frequency. The predicted sound power of the intake system indicated that the objective of reducing the overall engine noise by minimizing intake system noise was achieved.展开更多
Some concepts of virtual product are discussed. The key technologies ofvirtual fuel-pump development are in detail analysed, which include virtual fuel-pump productmodeling, intelligent simulation, distributed design ...Some concepts of virtual product are discussed. The key technologies ofvirtual fuel-pump development are in detail analysed, which include virtual fuel-pump productmodeling, intelligent simulation, distributed design environment, and virtual assembly. The virtualfuel-pump development prototype system considers requirement analysis, concept design, injectionpreferment analysis, detailed design, and assembly analysis.展开更多
In recent years, virtual simulation experiments have been widely used in education. However, at present, academic research on virtual simulation experiments mostly focuses on key technologies, and there are few emotio...In recent years, virtual simulation experiments have been widely used in education. However, at present, academic research on virtual simulation experiments mostly focuses on key technologies, and there are few emotional studies on virtual experiments. Based on the three-layer model of emotional design theory, this paper puts forward the method strategy of emotional simulation design in virtual simulation experiment, in order to provide some reference value for the design of virtual simulation experiment.展开更多
Natural products（NPs） have long been recognized as a valuable resource for drug discovery, and bringing NP-related features to virtual libraries is believed to be an effective way to increase the coverage of druggab...Natural products（NPs） have long been recognized as a valuable resource for drug discovery, and bringing NP-related features to virtual libraries is believed to be an effective way to increase the coverage of druggable chemical space. Here, deep learning-based molecule generative model, which is a recent technique in de novo molecule design, was applied to generate virtual libraries with NP-like properties. Results demonstrated that the model was effective in generating molecules that highly resemble NPs. Moreover, the model was also found to be capable of generating NP-like molecules that were also easy to synthesize, significantly increasing the practical value of the compound library.展开更多
To support modular fixture assembly design in virtual environment,a multi-view based modular fixture virtual assembly model is proposed.Instead of squeezing all assembly related information into a single model,three c...To support modular fixture assembly design in virtual environment,a multi-view based modular fixture virtual assembly model is proposed.Instead of squeezing all assembly related information into a single model,three complementary views of assembly model,element information,function and structure,and assembly relationship are proposed to be used.The first view contains the detailed element information,while the other two explicitly capture the hierarchical function relationships and mating relationships respectively.These views are complementary in the sense that each view only contains a specific aspect of assembly related information while together they include required assembly related information.The proposed assembly model is specialized to accommodate the features of modular fixture virtual assembly design and applied in our developed prototype system.展开更多
The Virtual Resistor based Active Damping(VR-AD) is widely employed in converters connected to the grid via LCL filters in order to mitigate the inherent resonance of the filters. Nevertheless, in digitally controlled...The Virtual Resistor based Active Damping(VR-AD) is widely employed in converters connected to the grid via LCL filters in order to mitigate the inherent resonance of the filters. Nevertheless, in digitally controlled systems, the PWM and the calculating delays modify the system characteristics in terms of frequency and phase, thus destabilizing the system and degrading the VR-AD performances, mainly in low switching frequencies. Moreover, the stability of the system is greatly affected under weak grid operation characterized by large grid impedance variation. This paper solves these problems by proposing a systematic, robust and optimized design procedure of voltage oriented PI control(VOC) with VRAD. The considered design procedure ensures robust control(sufficient stability margins) and high quality of grid current(reduced steady-state error and minimized THD value) despite the negative impact of digital time delay, grid impedance variation and filter parameters change. Simulation and experimental results are presented to show robustness and efficiency of the suggested design procedure.展开更多
The hybrid power-and voltage-based synchronization control method has shown potential for enhancing the stability of grid-forming(GFM)inverters.However,its effectiveness may be compromised if other control loops are n...The hybrid power-and voltage-based synchronization control method has shown potential for enhancing the stability of grid-forming(GFM)inverters.However,its effectiveness may be compromised if other control loops are not properly designed.To address the control-loop interactions,this paper presents a design-oriented analysis method for multiloop-controlled GFM inverters.The method begins by identifying the dominant oscillation modes through modal analysis.The sensitivities of damping ratios to control parameters are then determined for the dominant modes,which allows for characterization of control-loop interactions.A co-design method of GFM control is next developed based on the sensitivity analysis.Lastly,simulations and experimental results are presented to confirm the effectiveness of the method.展开更多
Concepts for a virtual 3D space and a hyper-sphere are proposed and the formulae for determining the computable nodes of the mesh are derived.Then a new optimization design method('Virtual Mesh Method'or V.M.M...Concepts for a virtual 3D space and a hyper-sphere are proposed and the formulae for determining the computable nodes of the mesh are derived.Then a new optimization design method('Virtual Mesh Method'or V.M.M)is developed.Three examples are given,showing that the method proposed is especially suitable for the optimized design of complex structures,and that the global approximate optimal solution can be searched with remarkably reduced computational work.展开更多
In textile and apparel field,the CAD technology has been developed rapidly.The CAD system with the func-tions of pattern making,marking and grading has be-come substantial equipment for an apparel factory,But this app...In textile and apparel field,the CAD technology has been developed rapidly.The CAD system with the func-tions of pattern making,marking and grading has be-come substantial equipment for an apparel factory,But this apparel CAD system is only one graphic system con-centrating on the two-dimensional paper patterns,the three-dimensional apparel CAD system or virtual reali-ty apparel CAD is still not put into practical use.But it is one of the most interesting studying fields for展开更多
基金Supported by National Natural Science Foundation of China (Grant Nos.51375496,51205409)
文摘Computer-based conceptual design for routine design has made great strides, yet non-routine design has not been given due attention, and it is still poorly automated. Considering that the function-behavior-structure（FBS） model is widely used for modeling the conceptual design process, a computer-based creativity enhanced conceptual design model（CECD） for non-routine design of mechanical systems is presented. In the model, the leaf functions in the FBS model are decomposed into and represented with fine-grain basic operation actions（BOA）, and the corresponding BOA set in the function domain is then constructed. Choosing building blocks from the database, and expressing their multiple functions with BOAs, the BOA set in the structure domain is formed. Through rule-based dynamic partition of the BOA set in the function domain, many variants of regenerated functional schemes are generated. For enhancing the capability to introduce new design variables into the conceptual design process, and dig out more innovative physical structure schemes, the indirect function-structure matching strategy based on reconstructing the combined structure schemes is adopted. By adjusting the tightness of the partition rules and the granularity of the divided BOA subsets, and making full use of the main function and secondary functions of each basic structure in the process of reconstructing of the physical structures, new design variables and variants are introduced into the physical structure scheme reconstructing process, and a great number of simpler physical structure schemes to accomplish the overall function organically are figured out. The creativity enhanced conceptual design model presented has a dominant capability in introducing new deign variables in function domain and digging out simpler physical structures to accomplish the overall function, therefore it can be utilized to solve non-routine conceptual design problem.
基金Supported by Fondazione TIM in the context of the “Facciamola Facile” initiativeby Programma Operativo Nazionale (PON)“Ricerca e Innovazione” 2014-2020-DM 1062/2021 funds
文摘Background Over the last few years,the rapid advancement of technology has led to the development of many approaches to digitalization.In this respect,metaverse provides 3D persistent virtual environments that can be used to access digital content,meet virtually,and perform several professional and leisure tasks.Among the numerous technologies supporting the metaverse,immersive Virtual Reality(VR)plays a primary role and offers highly interactive social experiences.Despite growing interest in this area,there are no clear design guidelines for creating environments tailored to the metaverse.Methods This study seeks to advance research in this area by moving from state-of-the-art studies on the design of immersive virtual environments in the context of metaverse and proposing how to integrate cutting-edge technologies within this context.Specifically,the best practices were identified by i)analyzing literature studies focused on human behavior in immersive virtual environments,ii)extracting common features of existing social VR platforms,and iii)conducting interviews with experts in a specific application domain.Specifically,this study considered the creation of a new virtual environment for MetaLibrary,a VR-based social platform aimed at integrating public libraries into metaverse.Several implementation challenges and additional requirements have been identified for the development of virtual environments(VEs).These elements were considered in the selection of specific cutting-edge technologies and their integration into the development process.A user study was also conducted to investigate some design aspects(namely lighting conditions and richness of the scene layout)for which deriving clear indications from the above analysis was not possible because different alternative configurations could be chosen.Results The work reported in this paper seeks to bridge the gap between existing VR platforms and related literature in the field,on the one hand,and requirements regarding immersive virtual environments for the metaverse,on the other hand,by reporting a set of best practices which were used to build a social virtual environment that meets users'expectations and needs.Conclusions Results suggest that carefully designed virtual environments can positively affect user experience and interaction within metaverse.The insights gained from this study offer valuable cues for developing immersive virtual environments for the metaverse to deliver more effective and engaging experiences.
文摘The early involvement of test and evaluation can significantly reduce the cost of modifying issues and errors found in the later stages of aircraft development and design process.This paper presents a methodology for aircraft mission effectiveness evaluation and design space exploration based on Virtual Operational Test(VOT),incorporating Virtual Open Scenario(VOS)and User in Scenarios(UIS)concepts.By employing modeling and simulation technologies in the early stages of aircraft development and design,a virtual environment can be constructed,allowing aircraft users to participate more closely and conveniently in the design process.Virtual tests conducted by users within the mission context provide data on mission effectiveness and critical user feedback.This paper outlines the main components of the virtual operational test process and related conceptual methods,and discusses an open support system framework that supports VOT.The effectiveness and adaptability of the method are demonstrated through two case studies:a beyond-visual-range air combat scenario and a helicopter ground attack scenario.These case studies demonstrate the evaluation of aircraft mission effectiveness and the sensitivity analysis and optimization of design and operational parameters based on VOT.
基金The 2024 National Social Science Fund West Project“Research on Cultural Inheritance and Digital Protection of Rural Settlements in Southwest China”(24XSH012)The 2024 Provincial Undergraduate University Innovative Experimental Project“Innovative Design Experimental Teaching Project under Digital Twin 3D Visualization Platform”The 2025 Sichuan University Artificial Intelligence Empowered Innovative Experimental Technology Research Project“Research on the Upgrade of VR-based Exhibition Space Free Construction and Dual-user Interactive Virtual Simulation Experimental Platform”(SCU2025009)。
文摘Addressing limitations such as the lack of immersion and difficulties in comprehensively evaluating design schemes in traditional teaching models of environmental design courses,this study explores teaching reforms using virtual simulation technology.An immersive virtual teaching environment was constructed,integrating virtual simulation technology gradually into the teaching process,with practical teaching cases used to assess the effectiveness of these reforms.Results demonstrate that virtual simulation technology significantly enhances students’spatial understanding and design expression abilities,while also improving teaching interactivity and student engagement.This reform aligns with the trend towards digital design,offering innovative ideas and methodologies for teaching environmental design courses.
基金Basic scientific research business expenses of universities directly under Inner Mongolia Autonomous Region,Key project of Philosophy and Social Science Foundation of Inner Mongolia Agricultural University(BR220603)Special project for improving scientific research ability of young teachers of Inner Mongolia Agricultural University(BR230218).
文摘To investigate the application of virtual digital technology in landscape engineering design,the study adopted the enu-meration survey method and observation method.It conducted a comprehensive analysis of the current status and existing chal-lenges of virtual digital technology in landscape engineering design.Additionally,the study provided a detailed description and explanation of the integration between virtual digital technology and landscape engineering design,while exploring its charac-teristics and application prospects.The findings revealed:(1)In the early design stage,technological integration enhanced design efficiency.The collaborative use of BIM,GIS,and parametric tools enabled a fully digital workflow from conceptual design to construction drawings,reducing design errors and shortening project timelines.(2)After implementation,interactive experiences revolutionized public engagement.AR/VR technologies introduced dynamic interactivity to landscapes,while metaverse plat-forms expanded the presentation dimensions of virtual landscapes.(3)Smart maintenance promoted sustainability.IoT sensors and AI analytics facilitated real-time plant health monitoring and precise resource management,demonstrating significant advan-tages.The study identified existing limitations and proposed future directions,aiming to provide new theoretical and practical insights for the research and application of digital technology in landscape engineering design.
基金Scientific Research Project of Hunan Provincial Department of Education“Design and Implementation of Vocational Nursing Talent Training Based on Virtual Reality Immersive Game Teaching”(Project No.:23C0938)Loudi Vocational and Technical College 2024 Education and Teaching Reform Research Project“Design and Implementation of Surgical Nursing Gamification Course Based on Immersive Virtual Reality Technology”(Project No.:LZJY24ZZC01)。
文摘This paper mainly discusses the perioperative nursing course teaching model suitable for higher vocational education.The core content of“perioperative nursing”course is set according to surgical nursing posts,and gamified course objectives are designed according to learners’cognitive rules.Typical nursing tasks are used as the carrier,teaching case base is formed based on the concept of medical and educational collaboration,and gamified teaching situations are created based on VR technology to optimize the teaching process and enable students to experience the learning process immersive.Enhance students’job competency and professional competence.In the course design,modular teaching,project teaching,team cooperation teaching,gamification teaching,VR immersive teaching,medical teaching collaborative evaluation and other modes are aggregated,and the course design of perioperative nursing is re-carried out.
基金funded by the General Project of the National Social Science Fund(NSSF)of China in Art(Project No.23BG133)the Scientific Research Foundation ofWuhan Institute of Technology(Project No.K2023064)+2 种基金the Open Fund of Key Research Base of Humanities and Social Sciences in Hubei Province—Research Center for College Students’Development and Innovation Education:“VR Healing Intervention for College Students’Academic Anxiety—VR Healing Based on Intention Dialogue”(Project No.DXS2023017)the Research Project of China Youth and Children Research Society(Project No.2025B11)the Major Strategic Consulting Projects of the Chinese Academy of Engineering between Academy and Local Regions(Project No.2024-DFZD-41).
文摘Objectives:Emotional stress is a significant public health challenge.Virtual reality(VR)offers the potential for aiding emotional recovery.This study explores the impact of VR environment design factors on emotional recovery,examining underlying mechanisms through physiological indicators and behavioral responses.Methods:Two experimentswere conducted.Experiment 1 employed a 4[Scene Type:real environment(RE),virtual scenes that restore the RE(VR),virtual scenes that incorporate natural window view design(VR-W),and a no-scene control condition(CTL)]×3(Experimental Phase:baseline,emotion arousal,recovery)mixed design(N=33).Participants viewed a 4-min anxiety-inducing video followed by a 3-min scene exposure.State-Trait Anxiety Inventory-State Form(STAIS),galvanic skin response(GSR),and blood-volume pulse(BVP)frequency were analyzed with linear mixed-effects models.Experiment 2 used a 3(Motion-control mode:Unnatural,Semi-natural,Natural)×2(Sound form:Spatial positioning,Surround)×3(Experimental Phase:baseline,emotion arousal,recovery)mixed design(N=42).Presence was analyzed with the Scheirer–Ray–Hare test;phase efficacy was verified with Friedman tests.Results:Experiment 1 showed significant Scene Type×Experimental Phase interactions for GSR(F=8.006,p<0.001,η^(2)_(p)=0.624)and BVP frequency(F=11.491,p<0.001,η^(2)_(p)=0.704).VR-Wproduced the largest recovery(ΔGSR=–1.26;ΔBVP=–5.80;Hedges g≥0.83)vs.RE and VR.STAI-S returned to baseline across all Scene Types.Experiment 2 revealedmain effects of Motion-control mode(F=8.55,p=0.001,η^(2)_(p)=0.32)and Sound form(F=4.35,p=0.044,η^(2)_(p)=0.11)on Presence(Semi-natural+Spatial positioning highest).The greatest physiological recovery occurred with the UnnaturalMotioncontrolmode(GSRH=20.17,p<0.001,ε^(2)=0.49;BVPH=7.92,p=0.019),amplified by Spatial positioning Sound form only in this mode.Design factors did not influence STAI-S change.Conclusions:VR scenes are as restorative as RE;embedding VR-W accelerates recovery.Maximal Presence is not essential:Unnatural Motion-control mode induced the largest physiological recovery,especially combined with Spatial positioning Sound form.
基金Supported by the National Natural Science Foundation of China(61062007)the Principal Fund Project of Tarim University,China(TDZKSS201115)~~
文摘According to the morphological structure characteristics of plants, the de- velopment mode for component-based virtual plants software was put forward, and the internal structure of plant organs component under this mode were analyzed, thereby, the overall design mode for virtual plants software was given out, and its characteristics were estimated. Compared with traditional development modes of virtual plants software, component-based virtual plants software had significant advantages in code reusing, development efficiency and expansion of software functions.
文摘In order to take requirements for commercial operations or military missions into better consideration in new flight vehicle design, a tri-hierarchical task classification model of ＂design for operation＂ is proposed, which takes basic man-object interaction task, complex collaborative operation and large-scale joint operation into account. The corresponding general architecture of evaluation criteria is also depicted. Then a virtual simulation-based approach to implement the evaluations at three hierarchy levels is mainly analyzed with a detailed example, which validates the feasibility and effectiveness of evaluation architecture. Finally, extending the virtual simulation architecture from design to operation training is discussed.
基金This project is supported by National Natural Science Foundation of China(No.59734090)Selected from Proceedings of 2000 the First International Conference on mechanical Engineering
文摘Using virtual reality to design a new type of hydraulic support is discussed.That is how to make use of the virtual design to develop coal mining machine in practice. Theadvantages of virtual design are studied and the simple virtual reality system is built. The 3Dparts and elements of hydraulic support are modeled with parametric design in CAD software, thenexported to VR environment, in which the virtual hydraulic support is assembled, operated andtested. With the method, the errors and faults of design can be fined easily, many improvements aremade and the new hydraulic support is developed successfully.
文摘This paper reports results of the authors’ studies on the virtual design method used in the development of low noise intake system of I.C. engine. The resulting high pass-by noise at level above the legislative target at full throttle when engine speed was around 5200 r/min necessitated a BEM-aided redesign task, following the typical process of design and development of an intake system. During the initial design, based on the acoustic theory and the requirements (1. The air flux of the redesigned should equal to or exceed the value of the original flux; 2. The filtering area must not be degraded), and considering the constraint of space in the engine compartment, total volume and rough internal dimensions were determined. During the detailed design, the exact internal dimensions of the air cleaner were determined, and an effective method was applied to improve the acoustic performance at low frequency. The predicted sound power of the intake system indicated that the objective of reducing the overall engine noise by minimizing intake system noise was achieved.
基金National Natural Science Founda-tion of China (No. 59889505).
文摘Some concepts of virtual product are discussed. The key technologies ofvirtual fuel-pump development are in detail analysed, which include virtual fuel-pump productmodeling, intelligent simulation, distributed design environment, and virtual assembly. The virtualfuel-pump development prototype system considers requirement analysis, concept design, injectionpreferment analysis, detailed design, and assembly analysis.
文摘In recent years, virtual simulation experiments have been widely used in education. However, at present, academic research on virtual simulation experiments mostly focuses on key technologies, and there are few emotional studies on virtual experiments. Based on the three-layer model of emotional design theory, this paper puts forward the method strategy of emotional simulation design in virtual simulation experiment, in order to provide some reference value for the design of virtual simulation experiment.
基金The National Natural Science Foundation of China(Grant No.81573273,81673279,21572010 and 21772005)National Major Scientific and Technological Special Project for"Significant New Drugs Development"(Grant No.2018ZX09735001-003)
文摘Natural products（NPs） have long been recognized as a valuable resource for drug discovery, and bringing NP-related features to virtual libraries is believed to be an effective way to increase the coverage of druggable chemical space. Here, deep learning-based molecule generative model, which is a recent technique in de novo molecule design, was applied to generate virtual libraries with NP-like properties. Results demonstrated that the model was effective in generating molecules that highly resemble NPs. Moreover, the model was also found to be capable of generating NP-like molecules that were also easy to synthesize, significantly increasing the practical value of the compound library.
文摘To support modular fixture assembly design in virtual environment,a multi-view based modular fixture virtual assembly model is proposed.Instead of squeezing all assembly related information into a single model,three complementary views of assembly model,element information,function and structure,and assembly relationship are proposed to be used.The first view contains the detailed element information,while the other two explicitly capture the hierarchical function relationships and mating relationships respectively.These views are complementary in the sense that each view only contains a specific aspect of assembly related information while together they include required assembly related information.The proposed assembly model is specialized to accommodate the features of modular fixture virtual assembly design and applied in our developed prototype system.
基金supported by the Tunisian Ministry of High Education and Research under Grant LSE-ENIT-LR11ES15
文摘The Virtual Resistor based Active Damping(VR-AD) is widely employed in converters connected to the grid via LCL filters in order to mitigate the inherent resonance of the filters. Nevertheless, in digitally controlled systems, the PWM and the calculating delays modify the system characteristics in terms of frequency and phase, thus destabilizing the system and degrading the VR-AD performances, mainly in low switching frequencies. Moreover, the stability of the system is greatly affected under weak grid operation characterized by large grid impedance variation. This paper solves these problems by proposing a systematic, robust and optimized design procedure of voltage oriented PI control(VOC) with VRAD. The considered design procedure ensures robust control(sufficient stability margins) and high quality of grid current(reduced steady-state error and minimized THD value) despite the negative impact of digital time delay, grid impedance variation and filter parameters change. Simulation and experimental results are presented to show robustness and efficiency of the suggested design procedure.
文摘The hybrid power-and voltage-based synchronization control method has shown potential for enhancing the stability of grid-forming(GFM)inverters.However,its effectiveness may be compromised if other control loops are not properly designed.To address the control-loop interactions,this paper presents a design-oriented analysis method for multiloop-controlled GFM inverters.The method begins by identifying the dominant oscillation modes through modal analysis.The sensitivities of damping ratios to control parameters are then determined for the dominant modes,which allows for characterization of control-loop interactions.A co-design method of GFM control is next developed based on the sensitivity analysis.Lastly,simulations and experimental results are presented to confirm the effectiveness of the method.
基金Project supported by the Natural Science Foundation of Henan Province,China(No.0311010400).
文摘Concepts for a virtual 3D space and a hyper-sphere are proposed and the formulae for determining the computable nodes of the mesh are derived.Then a new optimization design method('Virtual Mesh Method'or V.M.M)is developed.Three examples are given,showing that the method proposed is especially suitable for the optimized design of complex structures,and that the global approximate optimal solution can be searched with remarkably reduced computational work.
文摘In textile and apparel field,the CAD technology has been developed rapidly.The CAD system with the func-tions of pattern making,marking and grading has be-come substantial equipment for an apparel factory,But this apparel CAD system is only one graphic system con-centrating on the two-dimensional paper patterns,the three-dimensional apparel CAD system or virtual reali-ty apparel CAD is still not put into practical use.But it is one of the most interesting studying fields for
