Objective:To investigate the impact of applying PBL combined with virtual reality(VR)technology in clinical teaching of geriatric sarcopenia on students’knowledge acquisition,attitudes,and behaviors,providing practic...Objective:To investigate the impact of applying PBL combined with virtual reality(VR)technology in clinical teaching of geriatric sarcopenia on students’knowledge acquisition,attitudes,and behaviors,providing practical evidence for geriatric medicine teaching reform.Methods:Eighty clinical medicine undergraduate interns admitted to the geriatrics department of a hospital from January 2024 to June 2025 were randomly divided into an observation group(n=40)and a control group(n=40).The control group received traditional lecture-based instruction,while the observation group underwent PBL combined with VR technology.The two groups were compared on end-of-term theoretical knowledge assessment scores,clinical practice operation scores,teaching satisfaction,and clinical behavior observation scale scores.Results:Students in the observation group achieved significantly higher scores in basic theoretical knowledge(86.52±5.31)and clinical practice skills(88.15±4.26)compared to the control group(75.28±6.15)and(72.33±5.87),respectively(p<0.05).The observation group and control group students’awareness of geriatric sarcopenia and satisfaction with teaching methods were 95.00%and 97.50%,and 77.50%and 72.50%,respectively,with statistically significant differences(p<0.05);The observation group demonstrated significantly higher frequency of proactive sarcopenia screening,greater enthusiasm in participating in nutritional intervention plan development,and increased engagement in health education during clinical practice compared to the control group,with statistically significant differences(p<0.05).Conclusion:The application of a PBL combined with virtual reality(VR)technology teaching model in clinical teaching on geriatric sarcopenia significantly enhances students’foundational theoretical knowledge,improves their attitudes toward geriatric sarcopenia,and enhances their clinical practice behaviors.This represents a scientifically effective teaching method in geriatric medicine.展开更多
In recent years,the government has issued a series of documents to promote the construction of digital campuses.This initiative serves to encourage the deep integration of information technology and intelligent techno...In recent years,the government has issued a series of documents to promote the construction of digital campuses.This initiative serves to encourage the deep integration of information technology and intelligent technology education and digital reform,the combination of virtual reality and campus management is the need for innovative thinking and economic and social development,and then better change our learning style and living environment.The construction of the digital campus is based on virtual reality technology,BIM,GIS,and three-dimensional modeling technology to provide an immersive platform for students,promote the integration of virtual reality technology and education,help teachers,students,and parents to understand all kinds of education information and resources,to achieve their interoperability.From the off-campus environment to the school teaching equipment,teachers to teaching quality certification,and learning,to extracurricular entertainment,opening ceremonies to graduation parties,to bring more efficient,convenient,and safe campus life for teachers,students,and staff in school,and break the traditional information restrictions.展开更多
According to a BBC report,2016 marked the year when virtual reality(VR)transitioned from concept to reality1.VR has emerged in various fields and is highly effective in many ways.The implementation of VR technology in...According to a BBC report,2016 marked the year when virtual reality(VR)transitioned from concept to reality1.VR has emerged in various fields and is highly effective in many ways.The implementation of VR technology in teaching and learning has gradually become popular.Through the 3D realistic learning environment,learners are immersed in the virtual environment.Language education needs to create an immersive English learning environment and atmosphere.Therefore,in order to understand the substantial benefits of integrating VR into English language acquisition,this research will adopt the VR teaching materials to Freshman English Courses.For students who will participate in the use of VR technology to learn English,the pre-test,post-test,and surveys will be analyzed.Through the analysis of questionnaire data,explore whether the VR model is effective in enhancing learning interest and motivation,and evaluate the effectiveness of enhancing language ability learning.This research is based on the Technology Acceptance Model,using Pivot Report and SPSS software to analyze the results of the tests.Pearson correlation coefficient analysis will be also adopted to explore the three aspects of the usage of VR:(a)Does VR really work for enhancing learning motivation and interest?;(b)To explore the feasibility of VR in the educational field analyzed by the Technology Acceptance Model(TAM,Technology Acceptance Model);and(c)Learning effectiveness of the participants.The results of this research will provide references for language teachers who would like to implement innovative teaching,enrich teaching materials,and enhance learning effectiveness.展开更多
Background Most existing chemical experiment teaching systems lack solid immersive experiences,making it difficult to engage students.To address these challenges,we propose a chemical simulation teaching system based ...Background Most existing chemical experiment teaching systems lack solid immersive experiences,making it difficult to engage students.To address these challenges,we propose a chemical simulation teaching system based on virtual reality and gesture interaction.Methods The parameters of the models were obtained through actual investigation,whereby Blender and 3DS MAX were used to model and import these parameters into a physics engine.By establishing an interface for the physics engine,gesture interaction hardware,and virtual reality(VR)helmet,a highly realistic chemical experiment environment was created.Using code script logic,particle systems,as well as other systems,chemical phenomena were simulated.Furthermore,we created an online teaching platform using streaming media and databases to address the problems of distance teaching.Results The proposed system was evaluated against two mainstream products in the market.In the experiments,the proposed system outperformed the other products in terms of fidelity and practicality.Conclusions The proposed system which offers realistic simulations and practicability,can help improve the high school chemistry experimental education.展开更多
With the application of virtual reality technology to realize interactive display of virtual museum as content of study,we analyze the problems in the current virtual museum system.Taking Daqing Museum for example,we ...With the application of virtual reality technology to realize interactive display of virtual museum as content of study,we analyze the problems in the current virtual museum system.Taking Daqing Museum for example,we develop a 2.5D(between 2D and 3D) architectural modeling technology,and combine it with virtual reality technology,to create the virtual museum simulation platform.By establishing the virtual simulation platform of Daqing Museum,we verify the feasibility of using 2.5D architectural modeling technology to build the virtual museum system,create a virtual simulation platform with practical value,and show the bright future of virtual museum based on 2.5D virtual reality technology.展开更多
A CNC simulation system based on intemet for operation training of manufacturing facility and manufacturing process simulation is proposed.Firstly,the system framework and a rapid modeling method of CNC machine tool a...A CNC simulation system based on intemet for operation training of manufacturing facility and manufacturing process simulation is proposed.Firstly,the system framework and a rapid modeling method of CNC machine tool are studied under the virtual environment based on PolyTrans and CAD software.Then,a new method is proposed to enhance and expand the interactive ability of virtual reality modeling language(VRML)by attaining communication among VRML,JavaApplet,JavaScript and Html so as to realize the virtual operation for CNC machine tool.Moreover,the algorithm of material removed simulation based on VRML Z-map is presented.The advantages of this algorithm include less memory requirement and much higher computation.Lastly,the CNC milling machine is taken as an illustrative example for the prototype development in order to validate the feasibility of the proposed approach.展开更多
As one of the most important applications of digitalization,intelligence,and service,the digital twin(DT)breaks through the constraints of time,space,cost,and security on physical entities,expands and optimizes the re...As one of the most important applications of digitalization,intelligence,and service,the digital twin(DT)breaks through the constraints of time,space,cost,and security on physical entities,expands and optimizes the relevant functions of physical entities,and enhances their application value.This phenomenon has been widely studied in academia and industry.In this study,the concept and definition of DT,as utilized by scholars and researchers in various fields of industry,are summarized.The internal association between DT and related technologies is explained.The four stages of DT development history are identified.The fundamentals of the technology,evaluation indexes,and model frameworks are reviewed.Subsequently,a conceptual ternary model of DT based on time,space,and logic is proposed.The technology and application status of typical DT systems are described.Finally,the current technical challenges of DT technology are analyzed,and directions for future development are discussed.展开更多
Based on the applications of virtual reality technology in many fields, introducedthe virtual reality technical basic concept, structure type, related technique development,etc., tallied up applications of virtual rea...Based on the applications of virtual reality technology in many fields, introducedthe virtual reality technical basic concept, structure type, related technique development,etc., tallied up applications of virtual reality technique in the present mining industry, inquired into core techniques related software and hardware, especially the optimization inthe setup of various 3D models technique, and carried out a virtual scene to travel extensively in real-time by stereoscopic manifestation technique and so on. Then it broughtforward the solution of virtual reality technique with software and hardware to the miningindustry that can satisfy the demand of different aspects and levers. Finally, it show a fineprospect of virtual reality technique applied in the mining industry.展开更多
With the advancing digital technology and information tools in networking the core of manufacturing activities has shifted from the physical production of goods to the systematic processing of knowledge.The competitiv...With the advancing digital technology and information tools in networking the core of manufacturing activities has shifted from the physical production of goods to the systematic processing of knowledge.The competitiveness of tomorrow’s manufacturing enterprise lies in the operation of such digital factory in parallel with the physical one.This change in manufacturing in the digital age is taking place not only in Hong Kong but worldwide.This paper describes the development of establishing a digital factory laboratory in the Department of Industrial and Systems Engineering of The Hong Kong Polytechnic University.The Digital Factory is a focus for teaching research and technology transfer in the area of digital manufacturing.The paper also describes an application case of virtual manufacturing in which computer simulation models of a production line of an AC motor are developed for investigation.展开更多
The landscape of hepatobiliary surgical education has undergone a significanttransformation with the integration of advanced technologies such as threedimensionalmodeling,virtual reality,augmented reality,and artifici...The landscape of hepatobiliary surgical education has undergone a significanttransformation with the integration of advanced technologies such as threedimensionalmodeling,virtual reality,augmented reality,and artificial intelligence.This review synthesizes recent advancements in surgical education,examiningthe role of these technologies in improving anatomical understanding,surgicalskill acquisition,and overall trainee engagement.Evidence from randomizedcontrolled trials,systematic reviews,and cohort studies shows that immersivetraining tools,including virtual reality,augmented reality,and haptic feedback,outperform traditional apprenticeship methods in fostering cognitive and psychomotorskills.Artificial intelligence applications provide real-time feedback,furtherenhancing learning efficiency.However,these technologies should complement,rather than replace,traditional hands-on training.Some challenges remain to beaddressed,such as high costs,infrastructure requirements,and limited long-termvalidation of these technologies.The review concludes that while these innovationsoffer promising educational benefits,further research is needed to standardizetheir application and evaluate their long-term impact on surgical outcomes.展开更多
Dynamic simulation system of maize growth is developed by the physiological and ecological model,morphological structure model,computer science and virtual reality technology,to improve the level of precise operation ...Dynamic simulation system of maize growth is developed by the physiological and ecological model,morphological structure model,computer science and virtual reality technology,to improve the level of precise operation of maize production.The computer graphics algorithms,virtual reality technology,animation design and information integration technology are applied to maize production by this system.establishment of dynamic simulation system of maize growth is conducive to raise level of precise operation in maize production.The system also can assist the relevant production research and testing,to reduce cost and improve efficiency.展开更多
In order to realize parametric simulation of three-dimensional(3D)fabric structure based on web,a 3D model describing a plain knitted fabric,in which the cross-section of the yarn is circular shape and the path of the...In order to realize parametric simulation of three-dimensional(3D)fabric structure based on web,a 3D model describing a plain knitted fabric,in which the cross-section of the yarn is circular shape and the path of the yarn is cubic B-spline curve,is proposed in this paper.With this model,the 3D simulation of the loop and of the basic structures of the knitted fabric is realized by using Virtual Reality Modeling Language(VRML).The virtual simulation scene is suitable for network transmission with freely available VRML browsers and can be translated,scaled and rotated quite arbitrarily.By using Java and External Authoring Interface(EAI)technology,the web-based interactive simulation platform of weft knitted fabric is established.The user can input type of structures,basic fabric parameters,and yarn colors interactively to obtain a more realistic simulation result in real-time.A new approach is provided to imitate the knitted fabric 3D appearance on network.展开更多
To describe strategies for addressing technical aspects of computational modeling of leg tissue with the finite element （FE） method, a patient＇s leg sample was selected and scanned by CT at the direction parallel t...To describe strategies for addressing technical aspects of computational modeling of leg tissue with the finite element （FE） method, a patient＇s leg sample was selected and scanned by CT at the direction parallel to the Frankfort Horizontal plane. A three-dimensional （3D） finite element model of the human leg was developed using the actual geometry of the leg skeleton and soft tissues, which were obtained from 3D reconstruction of CT images. All joints were defined as contact surfaces, which allow relative articulating movement. The major ligaments were simulated using tension-only truss elements by connecting the corresponding attachment points on the bone surfaces. The bony and ligamentous structures were embedded in a volume of soft tissues. The muscles were defined as non-linear viscoelastic material, and the skin, ligaments and tendons were defined as hyperelastic, while the bony structures were assumed to be linearly elastic. The muhilayer FEM model containing thighbone, tibia, fibula, kneecap, soft tissue was formed after meshing. Diverse forces were imposed on the FEM model. The results show that the multilayer FEM model can represent tissue deformation more accurately.展开更多
<strong>Aim:</strong> To carry out a 3D vector reconstruction of the typical cervical vertebra from anatomical sections of the “Korean Visible Human” for educational purposes. <strong>Material and ...<strong>Aim:</strong> To carry out a 3D vector reconstruction of the typical cervical vertebra from anatomical sections of the “Korean Visible Human” for educational purposes. <strong>Material and Methods:</strong> The anatomical subject was a 33-year-old Korean man who died of leukemia. He was 164 cm tall and weighed 55 kg. This man donated his body to science. Her body was frozen and cut into several anatomical sections after an MRI and CT scan. These anatomical sections were made using a special saw called a 0.2 mm thick cryomacrotome. Thus 8100 cuts were obtained. Only the sections numbered 940 to 1200 were used for our study. A segmentation by manual contouring of the different parts of the typical cervical vertebra was made using the software Winsurf version 3.5 on a laptop PC running Windows 7 equipped with a Ram of 8 gigas. <strong>Results:</strong> Our 3D vector model of the typical cervical vertebra is easily manipulated using the Acrobat 3DPDF interface. Each part of the vertebra accessible in a menu can be displayed, hidden or made transparent, and 3D labels are available as well as educational menus for learning anatomy. <strong>Conclusion: </strong>This original work constitutes a remarkable educational tool for the anatomical study of the typical cervical vertebra and can also be used as a 3D atlas for simulation purposes for training in therapeutic gestures.展开更多
The new technology of geomorphology visualization modeling and virtual reality for tidal current numerical simulation are the important methods utilized in coastal ocean research. In the project of studying the evolut...The new technology of geomorphology visualization modeling and virtual reality for tidal current numerical simulation are the important methods utilized in coastal ocean research. In the project of studying the evolutionary trend of radial sand ridges in South Yellow Sea of China, this method becomes the key to reveal the correlation betweenthe seabed topography and the hydrodynamic factor——tidal current. It is proved that using the geomorphology visualization and tidal virtual reality techniques, oceanog-raphers might be able to intuitively discover the interaction pattern of sand ridges and tidal current, predicting the development of sand ridge stability in the future. Furthermore,a prototypic software system——VROcean was designed andimplemented to examine the performance of the new visualization technology on the contrast to traditional methods.展开更多
Introduction: This paper presents the design, development, and usability evaluation of a custom haptic syringe aimed to improve the realism of a virtual reality local anesthesia simulation (VRLA), specifically for the...Introduction: This paper presents the design, development, and usability evaluation of a custom haptic syringe aimed to improve the realism of a virtual reality local anesthesia simulation (VRLA), specifically for the inferior alveolar nerve block (IANB), that formally used a head mounted device (HMD) and vibration feedback via hand controllers. The custom haptic syringe interface provides a more realistic tactile sensation of plunging a real syringe in a human patient. This pilot study investigated the usability of the custom haptic syringe to replace one of the hand controllers to provide a more realistic and better training experience. Method: A one group pre-post survey investigated student perceptions regarding the effectiveness and usability of a haptic syringe to provide a more realistic experience to train dental students to learn the procedural steps to inject local anesthesia into a virtual patient. Twenty-two third year dental students participated. The pre-post survey examined changes in students’ perceived emotions, preparedness, and effectiveness of the VRLA as a foundational learning strategy prior to entering clinical group practice. Results: While quantitative results on comparable survey questions did not yield statistically significant differences, qualitative open-ended responses revealed a much greater satisfaction using the custom haptic syringe compared to the out of the box controllers. Conclusions: Feedback regarding the haptic syringe showed a substantial step closer to providing a more real experience for students in an effort to create a better bridge between classroom learning and clinical practice in order to prepare students to more confidently and competently work with real clients. Further refinement of the syringe is forthcoming along with a more formal comparative experimental study.展开更多
以北京市四惠枢纽为研究对象,探索以数据驱动为导向满足乘客需求的枢纽动态导向标识方案评估及优化设计方法。首先,搭建KANO乘客需求模型,通过桌面实验,形成动态导向标识在内容、样式及空间位置上的优化设计方案,与四惠枢纽现有方案形...以北京市四惠枢纽为研究对象,探索以数据驱动为导向满足乘客需求的枢纽动态导向标识方案评估及优化设计方法。首先,搭建KANO乘客需求模型,通过桌面实验,形成动态导向标识在内容、样式及空间位置上的优化设计方案,与四惠枢纽现有方案形成对比。其次,基于寻路理论通过建筑信息建模(building information modeling,BIM)+虚拟现实(virtual reality,VR)仿真技术,实现人与枢纽的信息交互,提取新旧导向标识方案作用下乘客寻路过程的特征参数。最后,通过对寻路实验中主客观指标分析可知,被试在新版动态导向标识方案中寻路时间、犯错误点数及迷茫点数显著降低,且新版动态导向标识方案在内容、样式及空间位置上满意度均优于旧版。结果表明:研究搭建BIM+VR的虚拟仿真平台,形成以数据驱动为导向的枢纽动态导向标识方案综合评估及优化设计方法,为枢纽动态导向标识方案设计及合理应用提供技术与理论支撑。展开更多
文摘Objective:To investigate the impact of applying PBL combined with virtual reality(VR)technology in clinical teaching of geriatric sarcopenia on students’knowledge acquisition,attitudes,and behaviors,providing practical evidence for geriatric medicine teaching reform.Methods:Eighty clinical medicine undergraduate interns admitted to the geriatrics department of a hospital from January 2024 to June 2025 were randomly divided into an observation group(n=40)and a control group(n=40).The control group received traditional lecture-based instruction,while the observation group underwent PBL combined with VR technology.The two groups were compared on end-of-term theoretical knowledge assessment scores,clinical practice operation scores,teaching satisfaction,and clinical behavior observation scale scores.Results:Students in the observation group achieved significantly higher scores in basic theoretical knowledge(86.52±5.31)and clinical practice skills(88.15±4.26)compared to the control group(75.28±6.15)and(72.33±5.87),respectively(p<0.05).The observation group and control group students’awareness of geriatric sarcopenia and satisfaction with teaching methods were 95.00%and 97.50%,and 77.50%and 72.50%,respectively,with statistically significant differences(p<0.05);The observation group demonstrated significantly higher frequency of proactive sarcopenia screening,greater enthusiasm in participating in nutritional intervention plan development,and increased engagement in health education during clinical practice compared to the control group,with statistically significant differences(p<0.05).Conclusion:The application of a PBL combined with virtual reality(VR)technology teaching model in clinical teaching on geriatric sarcopenia significantly enhances students’foundational theoretical knowledge,improves their attitudes toward geriatric sarcopenia,and enhances their clinical practice behaviors.This represents a scientifically effective teaching method in geriatric medicine.
文摘In recent years,the government has issued a series of documents to promote the construction of digital campuses.This initiative serves to encourage the deep integration of information technology and intelligent technology education and digital reform,the combination of virtual reality and campus management is the need for innovative thinking and economic and social development,and then better change our learning style and living environment.The construction of the digital campus is based on virtual reality technology,BIM,GIS,and three-dimensional modeling technology to provide an immersive platform for students,promote the integration of virtual reality technology and education,help teachers,students,and parents to understand all kinds of education information and resources,to achieve their interoperability.From the off-campus environment to the school teaching equipment,teachers to teaching quality certification,and learning,to extracurricular entertainment,opening ceremonies to graduation parties,to bring more efficient,convenient,and safe campus life for teachers,students,and staff in school,and break the traditional information restrictions.
文摘According to a BBC report,2016 marked the year when virtual reality(VR)transitioned from concept to reality1.VR has emerged in various fields and is highly effective in many ways.The implementation of VR technology in teaching and learning has gradually become popular.Through the 3D realistic learning environment,learners are immersed in the virtual environment.Language education needs to create an immersive English learning environment and atmosphere.Therefore,in order to understand the substantial benefits of integrating VR into English language acquisition,this research will adopt the VR teaching materials to Freshman English Courses.For students who will participate in the use of VR technology to learn English,the pre-test,post-test,and surveys will be analyzed.Through the analysis of questionnaire data,explore whether the VR model is effective in enhancing learning interest and motivation,and evaluate the effectiveness of enhancing language ability learning.This research is based on the Technology Acceptance Model,using Pivot Report and SPSS software to analyze the results of the tests.Pearson correlation coefficient analysis will be also adopted to explore the three aspects of the usage of VR:(a)Does VR really work for enhancing learning motivation and interest?;(b)To explore the feasibility of VR in the educational field analyzed by the Technology Acceptance Model(TAM,Technology Acceptance Model);and(c)Learning effectiveness of the participants.The results of this research will provide references for language teachers who would like to implement innovative teaching,enrich teaching materials,and enhance learning effectiveness.
基金National Innovation and Entrepreneurship Program for College Students(202218213001)Science and Technology Innovation Strategy of Guangdong Province(Science and Technology Innovation Cultivation of University Students 2020329182130C000002).
文摘Background Most existing chemical experiment teaching systems lack solid immersive experiences,making it difficult to engage students.To address these challenges,we propose a chemical simulation teaching system based on virtual reality and gesture interaction.Methods The parameters of the models were obtained through actual investigation,whereby Blender and 3DS MAX were used to model and import these parameters into a physics engine.By establishing an interface for the physics engine,gesture interaction hardware,and virtual reality(VR)helmet,a highly realistic chemical experiment environment was created.Using code script logic,particle systems,as well as other systems,chemical phenomena were simulated.Furthermore,we created an online teaching platform using streaming media and databases to address the problems of distance teaching.Results The proposed system was evaluated against two mainstream products in the market.In the experiments,the proposed system outperformed the other products in terms of fidelity and practicality.Conclusions The proposed system which offers realistic simulations and practicability,can help improve the high school chemistry experimental education.
文摘With the application of virtual reality technology to realize interactive display of virtual museum as content of study,we analyze the problems in the current virtual museum system.Taking Daqing Museum for example,we develop a 2.5D(between 2D and 3D) architectural modeling technology,and combine it with virtual reality technology,to create the virtual museum simulation platform.By establishing the virtual simulation platform of Daqing Museum,we verify the feasibility of using 2.5D architectural modeling technology to build the virtual museum system,create a virtual simulation platform with practical value,and show the bright future of virtual museum based on 2.5D virtual reality technology.
基金Selected from Proceedings of the 7th International Conference on Frontiers of Design and Manufacturing(ICFDM'2006)This project is supported by National Natural Science Foundation of China(No.50775047)Scientific and Technological Foundation of Guangdong Province,China(No.2004B10201032).
文摘A CNC simulation system based on intemet for operation training of manufacturing facility and manufacturing process simulation is proposed.Firstly,the system framework and a rapid modeling method of CNC machine tool are studied under the virtual environment based on PolyTrans and CAD software.Then,a new method is proposed to enhance and expand the interactive ability of virtual reality modeling language(VRML)by attaining communication among VRML,JavaApplet,JavaScript and Html so as to realize the virtual operation for CNC machine tool.Moreover,the algorithm of material removed simulation based on VRML Z-map is presented.The advantages of this algorithm include less memory requirement and much higher computation.Lastly,the CNC milling machine is taken as an illustrative example for the prototype development in order to validate the feasibility of the proposed approach.
基金the National Natural Science Foundation of China,Nos.62072388 and U21A20515Fuxiaquan Self-Created Area Collaborative Special Project,No.3ZCQXT202001+3 种基金Fujian Science and Technology Plan Industrial Guiding Project,No.2H0047Fujian Natural Science Foundation Project,No.2J016012019 Fujian Science and Technology Plan Innovation Fund Project,No.2C0021and Fujian Sunshine Charity Foundation.
文摘As one of the most important applications of digitalization,intelligence,and service,the digital twin(DT)breaks through the constraints of time,space,cost,and security on physical entities,expands and optimizes the relevant functions of physical entities,and enhances their application value.This phenomenon has been widely studied in academia and industry.In this study,the concept and definition of DT,as utilized by scholars and researchers in various fields of industry,are summarized.The internal association between DT and related technologies is explained.The four stages of DT development history are identified.The fundamentals of the technology,evaluation indexes,and model frameworks are reviewed.Subsequently,a conceptual ternary model of DT based on time,space,and logic is proposed.The technology and application status of typical DT systems are described.Finally,the current technical challenges of DT technology are analyzed,and directions for future development are discussed.
文摘Based on the applications of virtual reality technology in many fields, introducedthe virtual reality technical basic concept, structure type, related technique development,etc., tallied up applications of virtual reality technique in the present mining industry, inquired into core techniques related software and hardware, especially the optimization inthe setup of various 3D models technique, and carried out a virtual scene to travel extensively in real-time by stereoscopic manifestation technique and so on. Then it broughtforward the solution of virtual reality technique with software and hardware to the miningindustry that can satisfy the demand of different aspects and levers. Finally, it show a fineprospect of virtual reality technique applied in the mining industry.
文摘With the advancing digital technology and information tools in networking the core of manufacturing activities has shifted from the physical production of goods to the systematic processing of knowledge.The competitiveness of tomorrow’s manufacturing enterprise lies in the operation of such digital factory in parallel with the physical one.This change in manufacturing in the digital age is taking place not only in Hong Kong but worldwide.This paper describes the development of establishing a digital factory laboratory in the Department of Industrial and Systems Engineering of The Hong Kong Polytechnic University.The Digital Factory is a focus for teaching research and technology transfer in the area of digital manufacturing.The paper also describes an application case of virtual manufacturing in which computer simulation models of a production line of an AC motor are developed for investigation.
文摘The landscape of hepatobiliary surgical education has undergone a significanttransformation with the integration of advanced technologies such as threedimensionalmodeling,virtual reality,augmented reality,and artificial intelligence.This review synthesizes recent advancements in surgical education,examiningthe role of these technologies in improving anatomical understanding,surgicalskill acquisition,and overall trainee engagement.Evidence from randomizedcontrolled trials,systematic reviews,and cohort studies shows that immersivetraining tools,including virtual reality,augmented reality,and haptic feedback,outperform traditional apprenticeship methods in fostering cognitive and psychomotorskills.Artificial intelligence applications provide real-time feedback,furtherenhancing learning efficiency.However,these technologies should complement,rather than replace,traditional hands-on training.Some challenges remain to beaddressed,such as high costs,infrastructure requirements,and limited long-termvalidation of these technologies.The review concludes that while these innovationsoffer promising educational benefits,further research is needed to standardizetheir application and evaluate their long-term impact on surgical outcomes.
基金Supported by Supported by National High Technology Research and Development Program of China(2006AA10A039)Special Funding Projects for Research in Agricultural Public Service Sectors (200803037)Technology Development Program of Jilin Province (2006BAD02A10-6-6)~~
文摘Dynamic simulation system of maize growth is developed by the physiological and ecological model,morphological structure model,computer science and virtual reality technology,to improve the level of precise operation of maize production.The computer graphics algorithms,virtual reality technology,animation design and information integration technology are applied to maize production by this system.establishment of dynamic simulation system of maize growth is conducive to raise level of precise operation in maize production.The system also can assist the relevant production research and testing,to reduce cost and improve efficiency.
基金Jiangsu Natural Science Foundation of University,China(No.07KJD540178)Foundation of Nantong Science and Technology of China(No.K2007009)Graduate Innovation Project of Nantong University,China(No.YKC09056)
文摘In order to realize parametric simulation of three-dimensional(3D)fabric structure based on web,a 3D model describing a plain knitted fabric,in which the cross-section of the yarn is circular shape and the path of the yarn is cubic B-spline curve,is proposed in this paper.With this model,the 3D simulation of the loop and of the basic structures of the knitted fabric is realized by using Virtual Reality Modeling Language(VRML).The virtual simulation scene is suitable for network transmission with freely available VRML browsers and can be translated,scaled and rotated quite arbitrarily.By using Java and External Authoring Interface(EAI)technology,the web-based interactive simulation platform of weft knitted fabric is established.The user can input type of structures,basic fabric parameters,and yarn colors interactively to obtain a more realistic simulation result in real-time.A new approach is provided to imitate the knitted fabric 3D appearance on network.
基金Sponsored by the Natural Science Foundation of Heilongjiang Province of China(Grant No.200815)the Research Foundation for Talented Scholars ofHarbin (Grant No.2008RFQXS061)
文摘To describe strategies for addressing technical aspects of computational modeling of leg tissue with the finite element （FE） method, a patient＇s leg sample was selected and scanned by CT at the direction parallel to the Frankfort Horizontal plane. A three-dimensional （3D） finite element model of the human leg was developed using the actual geometry of the leg skeleton and soft tissues, which were obtained from 3D reconstruction of CT images. All joints were defined as contact surfaces, which allow relative articulating movement. The major ligaments were simulated using tension-only truss elements by connecting the corresponding attachment points on the bone surfaces. The bony and ligamentous structures were embedded in a volume of soft tissues. The muscles were defined as non-linear viscoelastic material, and the skin, ligaments and tendons were defined as hyperelastic, while the bony structures were assumed to be linearly elastic. The muhilayer FEM model containing thighbone, tibia, fibula, kneecap, soft tissue was formed after meshing. Diverse forces were imposed on the FEM model. The results show that the multilayer FEM model can represent tissue deformation more accurately.
文摘<strong>Aim:</strong> To carry out a 3D vector reconstruction of the typical cervical vertebra from anatomical sections of the “Korean Visible Human” for educational purposes. <strong>Material and Methods:</strong> The anatomical subject was a 33-year-old Korean man who died of leukemia. He was 164 cm tall and weighed 55 kg. This man donated his body to science. Her body was frozen and cut into several anatomical sections after an MRI and CT scan. These anatomical sections were made using a special saw called a 0.2 mm thick cryomacrotome. Thus 8100 cuts were obtained. Only the sections numbered 940 to 1200 were used for our study. A segmentation by manual contouring of the different parts of the typical cervical vertebra was made using the software Winsurf version 3.5 on a laptop PC running Windows 7 equipped with a Ram of 8 gigas. <strong>Results:</strong> Our 3D vector model of the typical cervical vertebra is easily manipulated using the Acrobat 3DPDF interface. Each part of the vertebra accessible in a menu can be displayed, hidden or made transparent, and 3D labels are available as well as educational menus for learning anatomy. <strong>Conclusion: </strong>This original work constitutes a remarkable educational tool for the anatomical study of the typical cervical vertebra and can also be used as a 3D atlas for simulation purposes for training in therapeutic gestures.
基金This work was conducted as part of the production of the research projects supported by the National Natural Science Foundation of China (Grant No. 49701013) the Chinese National Institutes of Technology (Grant No. 96-922-03-01).
文摘The new technology of geomorphology visualization modeling and virtual reality for tidal current numerical simulation are the important methods utilized in coastal ocean research. In the project of studying the evolutionary trend of radial sand ridges in South Yellow Sea of China, this method becomes the key to reveal the correlation betweenthe seabed topography and the hydrodynamic factor——tidal current. It is proved that using the geomorphology visualization and tidal virtual reality techniques, oceanog-raphers might be able to intuitively discover the interaction pattern of sand ridges and tidal current, predicting the development of sand ridge stability in the future. Furthermore,a prototypic software system——VROcean was designed andimplemented to examine the performance of the new visualization technology on the contrast to traditional methods.
文摘Introduction: This paper presents the design, development, and usability evaluation of a custom haptic syringe aimed to improve the realism of a virtual reality local anesthesia simulation (VRLA), specifically for the inferior alveolar nerve block (IANB), that formally used a head mounted device (HMD) and vibration feedback via hand controllers. The custom haptic syringe interface provides a more realistic tactile sensation of plunging a real syringe in a human patient. This pilot study investigated the usability of the custom haptic syringe to replace one of the hand controllers to provide a more realistic and better training experience. Method: A one group pre-post survey investigated student perceptions regarding the effectiveness and usability of a haptic syringe to provide a more realistic experience to train dental students to learn the procedural steps to inject local anesthesia into a virtual patient. Twenty-two third year dental students participated. The pre-post survey examined changes in students’ perceived emotions, preparedness, and effectiveness of the VRLA as a foundational learning strategy prior to entering clinical group practice. Results: While quantitative results on comparable survey questions did not yield statistically significant differences, qualitative open-ended responses revealed a much greater satisfaction using the custom haptic syringe compared to the out of the box controllers. Conclusions: Feedback regarding the haptic syringe showed a substantial step closer to providing a more real experience for students in an effort to create a better bridge between classroom learning and clinical practice in order to prepare students to more confidently and competently work with real clients. Further refinement of the syringe is forthcoming along with a more formal comparative experimental study.
文摘以北京市四惠枢纽为研究对象,探索以数据驱动为导向满足乘客需求的枢纽动态导向标识方案评估及优化设计方法。首先,搭建KANO乘客需求模型,通过桌面实验,形成动态导向标识在内容、样式及空间位置上的优化设计方案,与四惠枢纽现有方案形成对比。其次,基于寻路理论通过建筑信息建模(building information modeling,BIM)+虚拟现实(virtual reality,VR)仿真技术,实现人与枢纽的信息交互,提取新旧导向标识方案作用下乘客寻路过程的特征参数。最后,通过对寻路实验中主客观指标分析可知,被试在新版动态导向标识方案中寻路时间、犯错误点数及迷茫点数显著降低,且新版动态导向标识方案在内容、样式及空间位置上满意度均优于旧版。结果表明:研究搭建BIM+VR的虚拟仿真平台,形成以数据驱动为导向的枢纽动态导向标识方案综合评估及优化设计方法,为枢纽动态导向标识方案设计及合理应用提供技术与理论支撑。
