目的为解决增强现实头显在工业管廊巡检中存在的交互认知断层与长时间作业生理疲劳问题,本研究旨在构建并验证一套兼顾直觉认知与工效舒适度的自然手势交互方案。方法融合基于现实的交互与工效学理论,构建了“直觉-工效”双重约束的交...目的为解决增强现实头显在工业管廊巡检中存在的交互认知断层与长时间作业生理疲劳问题,本研究旨在构建并验证一套兼顾直觉认知与工效舒适度的自然手势交互方案。方法融合基于现实的交互与工效学理论,构建了“直觉-工效”双重约束的交互设计模型。通过任务分析明确管廊巡检的核心需求,采“绿野仙踪”(Wizard of Oz)实验提取用户本能意向。针对大幅度挥臂导致的疲劳效应,引入“微手势”修正策略,确立了包含7个核心动作的手势集。搭建包含实体管道道具的“情境模拟”实验平台,在虚实融合环境下对方案的直观性、舒适度及任务鲁棒性进行实证评估。结果实验数据显示,该方案获得了较高的用户认可,整体可用性平均分达到4.35(SD值为0.65),“使用意愿”评分高达4.49。其中,“指尖微操”策略显著提升了感知舒适度,有效调和了操作直观性与生理负荷之间的矛盾。结论本研究提出的基于情境适应性的微手势交互方案,成功验证了从理论构建、策略修正到情境化评估的完整设计范式,为AR技术在工业巡检领域的落地提供了理论与实证支持。展开更多
Augmented reality(AR)displays have gained significant attention for their ability to blend the real and virtual worlds seamlessly.However,they face challenges like the vergence-accommodation conflict and a limited eye...Augmented reality(AR)displays have gained significant attention for their ability to blend the real and virtual worlds seamlessly.However,they face challenges like the vergence-accommodation conflict and a limited eyebox.The AR community is actively seeking lightweight,integrative optical elements to overcome these limitations.In this study,we demonstrate a three-dimensional varifocal meta-device for AR display.The meta-device is composed of three cascaded metasurfaces with Moiréand off-center Fresnel lens phase profiles designed to dynamically manipulate the focus point in three-dimensional space.The cascaded metasurfaces are designed and fabricated by the TiO_(2)nanopillars with varying diameters,which are polarizationinsensitive for light field manipulation.The focal point position is precisely controlled by the relative rotation between the metasurfaces.The meta-device achieves an effective focal length ranging from 3.7 mm to 33.2 mm and can adjust the lateral focal point within the same range.The dynamic eyebox size varies from 4.2 mm to 5.8 mm.This lightweight,integrated meta-device is well-suited for various imaging applications,including AR displays,as it simultaneously addresses the vergence-accommodation conflict and expands the eyebox.展开更多
Rice crops are frequently threatened by pests such as rice planthoppers(Nilaparvata lugens,Sogatella furcifera,and Laodelphax striatellus)and leafhoppers(Cicadellidae),which cause significant yield losses.Accurate ide...Rice crops are frequently threatened by pests such as rice planthoppers(Nilaparvata lugens,Sogatella furcifera,and Laodelphax striatellus)and leafhoppers(Cicadellidae),which cause significant yield losses.Accurate identification of both pest developmental stages and their natural predators is crucial for effective pest control and maintaining ecological balance.However,conventional field surveys are often subjective,inefficient,and lack traceability.To overcome these limitations,this study proposed RiceInsectID,a two-stage cascaded detection method designed to identify and count tiny rice pests and their natural predators from white flat plate images captured by head-worn AR glasses.The method recognizes 25 insect classes,including 17 instars of rice planthoppers,2 instars of leafhoppers,4 spider species(Araneae),as well as Miridae and rove beetles(Staphylinidae Latreille).At the first coarse-grained detection stage,16 visually similar classes are consolidated into 6 broader categories and detected using an enhanced YOLOv6 model.To improve small object detection and address class imbalance,the fullregion overlapping sliding slices and target pasting(FOSTP)algorithm was applied,increasing the mean average precision at a 50%IoU threshold(mAP50)by 35.46%over the baseline YOLOv6.Feature extraction and fusion were further improved by incorporating an efficient channel attention path aggregation feature pyramid network(ECA-PAFPN)and adaptive structure feature fusion(ASFF)modules,while the balanced classification mosaic(BCM)enhanced detection of minority classes.With test-time augmentation(TTA),mAP50 improved by an additional 2.06%,reaching 84.71%.At the second fine-grained classification stage,each of the six broad classes from the first stage is further classified using individual ResNet50 models.Online data augmentation and transfer learning were employed to significantly enhance generalization.Compared with the baseline YOLOv6,the two-stage cascaded method improved recall by 4.06%,precision by 3.79%,and the F1-score by 3.92%.Overall,RiceInsectID achieved 82.85%recall,80.62%precision,and an F1-score of 81.72%,demonstrating an efficient and practical solution for monitoring tiny rice pests and their natural predators in paddy fields.This study provides valuable insights for ecosystem monitoring and supporting sustainable pest management in rice agriculture.展开更多
With the iteration and upgrading of medical technology and the continuous growth of public health demands,the quality of nursing services has become a core indicator for measuring the effectiveness of the medical syst...With the iteration and upgrading of medical technology and the continuous growth of public health demands,the quality of nursing services has become a core indicator for measuring the effectiveness of the medical system.The clinical practice ability of nursing staff is directly related to the safety of patient diagnosis and treatment and the rehabilitation process.However,the current clinical nursing talent training model is facing bottlenecks such as limited practical scenarios and fragmented case cognition.This study focuses on the teaching application of augmented reality(AR)technology in hospital Settings and systematically reviews the research progress on the improvement of clinical practice ability of trainee nurses based on the AR immersive teaching model.By constructing a clinical teaching scenario that integrates virtual and real,AR technology can dynamically simulate complex case handling processes and enhance nursing students’three-dimensional cognition of condition assessment,operation norms,and emergency plans.Hospitals,as the core base for practical teaching,can effectively shorten the connection cycle between theoretical teaching and clinical practice by integrating AR technology,improve the clinical practice level of trainee nurses,and provide an innovative model for optimizing the path of clinical nursing talent cultivation.展开更多
Augmented reality(AR)is a technology that superimposes digital information onto real-world objects via head-mounted display devices to improve surgical finesse through visually enhanced medical information.With the ra...Augmented reality(AR)is a technology that superimposes digital information onto real-world objects via head-mounted display devices to improve surgical finesse through visually enhanced medical information.With the rapid development of digital technology,AR has been increasingly adopted in orthopedic surgeries across the globe,especially in total knee arthroplasty procedures which demand high precision.By overlaying digital information onto the surgeon's field of view,AR systems enhance precision,improve alignment accuracy,and reduce the risk of complications associated with malalignment.Some concerns have been raised despite accuracy,including the learning curve,long-term outcomes,and technical limitations.Furthermore,it is essential for health practitioners to gain trust in the utilisation of AR.展开更多
目的:探讨膜肾方对特发性膜性肾病大鼠血浆诱导损伤足细胞的干预作用及其机制。方法:建立特发性膜性肾病大鼠模型,用肝素钠作为抗凝剂收集其血浆样品并诱导足细胞损伤,分对照组、模型组、膜肾方组、膜肾方+C3a受体(C3aR)拮抗剂组、C3aR...目的:探讨膜肾方对特发性膜性肾病大鼠血浆诱导损伤足细胞的干预作用及其机制。方法:建立特发性膜性肾病大鼠模型,用肝素钠作为抗凝剂收集其血浆样品并诱导足细胞损伤,分对照组、模型组、膜肾方组、膜肾方+C3a受体(C3aR)拮抗剂组、C3aR拮抗剂组。采用Western blotting检测各组足细胞C3aR、磷脂酶A2受体(PLA2R)、磷酸化细胞外信号调节激酶1/2(p-ERK1/2)、磷酸化细胞浆型磷脂酶A2(p-cPLA2)蛋白表达水平;酶联免疫吸附试验(ELISA)检测上清液C3a表达水平;Real-time PCR测定Synaptopodin mRNA、C3aR m RNA、PLA2R mRNA表达水平;细胞计数试剂盒-8(CCK-8)检测各组足细胞活力。结果:与对照组比较,模型组足细胞C3aR、PLA2R、p-ERK1/2、p-cPLA2表达水平均升高,上清液C3a水平升高,Synaptopodin m RNA水平下降,C3aR mRNA、PLA2R mRNA水平升高,足细胞活力下降,差异均有统计学意义(P<0.01);与模型组比较,膜肾方组足细胞C3aR、PLA2R、p-ERK1/2、p-cPLA2表达水平均下降,上清液C3a水平下降,Synaptopodin m RNA水平升高,C3aR mRNA、PLA2R mRNA水平下降,足细胞活力改善,差异均有统计学意义(P<0.01);与膜肾方组比较,膜肾方+C3aR拮抗剂组及C3aR拮抗剂组足细胞C3aR、PLA2R、p-ERK1/2、p-cPLA2表达水平均下降,上清液C3a水平下降,Synaptopodin mRNA水平升高,C3aR m RNA、PLA2R mRNA水平下降,足细胞活力改善,膜肾方+C3aR拮抗剂组更明显,差异均有统计学意义(P<0.01)。结论:膜肾方可能通过调控C3a/C3aR通路,下调PLA2R水平,稳定足细胞骨架,改善足细胞活力,从而发挥对足细胞的保护作用。展开更多
文摘目的为解决增强现实头显在工业管廊巡检中存在的交互认知断层与长时间作业生理疲劳问题,本研究旨在构建并验证一套兼顾直觉认知与工效舒适度的自然手势交互方案。方法融合基于现实的交互与工效学理论,构建了“直觉-工效”双重约束的交互设计模型。通过任务分析明确管廊巡检的核心需求,采“绿野仙踪”(Wizard of Oz)实验提取用户本能意向。针对大幅度挥臂导致的疲劳效应,引入“微手势”修正策略,确立了包含7个核心动作的手势集。搭建包含实体管道道具的“情境模拟”实验平台,在虚实融合环境下对方案的直观性、舒适度及任务鲁棒性进行实证评估。结果实验数据显示,该方案获得了较高的用户认可,整体可用性平均分达到4.35(SD值为0.65),“使用意愿”评分高达4.49。其中,“指尖微操”策略显著提升了感知舒适度,有效调和了操作直观性与生理负荷之间的矛盾。结论本研究提出的基于情境适应性的微手势交互方案,成功验证了从理论构建、策略修正到情境化评估的完整设计范式,为AR技术在工业巡检领域的落地提供了理论与实证支持。
基金The National Key R&D Program of China(Grant Nos.2022YFA1404700)the Major Key Project of PCL(PCL2024A01)+7 种基金Shenzhen Municipal Basic Research(Key Project)(JCY20241202123919027)the National Natural Science Foundation of China(Nos.62305184)Basic and Applied Basic Research Foundation of Guangdong Province(2023A1515012932)Science,Technology and Innovation Commission of Shenzhen Municipality(WDZC20220818100259004)the Research Grants Council of the Hong Kong Special Administrative Region,China[Project No.C5031-22GCityU11310522CityU11300123]City University of Hong Kong[Project No.9610628].
文摘Augmented reality(AR)displays have gained significant attention for their ability to blend the real and virtual worlds seamlessly.However,they face challenges like the vergence-accommodation conflict and a limited eyebox.The AR community is actively seeking lightweight,integrative optical elements to overcome these limitations.In this study,we demonstrate a three-dimensional varifocal meta-device for AR display.The meta-device is composed of three cascaded metasurfaces with Moiréand off-center Fresnel lens phase profiles designed to dynamically manipulate the focus point in three-dimensional space.The cascaded metasurfaces are designed and fabricated by the TiO_(2)nanopillars with varying diameters,which are polarizationinsensitive for light field manipulation.The focal point position is precisely controlled by the relative rotation between the metasurfaces.The meta-device achieves an effective focal length ranging from 3.7 mm to 33.2 mm and can adjust the lateral focal point within the same range.The dynamic eyebox size varies from 4.2 mm to 5.8 mm.This lightweight,integrated meta-device is well-suited for various imaging applications,including AR displays,as it simultaneously addresses the vergence-accommodation conflict and expands the eyebox.
基金supported by the National Key Research Program of China during the 14th Five-Year Plan Period(Grant No.2021YFD1401100)the Zhejiang Provincial Natural Science Foundation of China(Grant No.LTGN24C140007)the‘San Nong Jiu Fang’Sciences and Technologies Cooperation Project of Zhejiang Province,China(Grant No.2024SNJF010)。
文摘Rice crops are frequently threatened by pests such as rice planthoppers(Nilaparvata lugens,Sogatella furcifera,and Laodelphax striatellus)and leafhoppers(Cicadellidae),which cause significant yield losses.Accurate identification of both pest developmental stages and their natural predators is crucial for effective pest control and maintaining ecological balance.However,conventional field surveys are often subjective,inefficient,and lack traceability.To overcome these limitations,this study proposed RiceInsectID,a two-stage cascaded detection method designed to identify and count tiny rice pests and their natural predators from white flat plate images captured by head-worn AR glasses.The method recognizes 25 insect classes,including 17 instars of rice planthoppers,2 instars of leafhoppers,4 spider species(Araneae),as well as Miridae and rove beetles(Staphylinidae Latreille).At the first coarse-grained detection stage,16 visually similar classes are consolidated into 6 broader categories and detected using an enhanced YOLOv6 model.To improve small object detection and address class imbalance,the fullregion overlapping sliding slices and target pasting(FOSTP)algorithm was applied,increasing the mean average precision at a 50%IoU threshold(mAP50)by 35.46%over the baseline YOLOv6.Feature extraction and fusion were further improved by incorporating an efficient channel attention path aggregation feature pyramid network(ECA-PAFPN)and adaptive structure feature fusion(ASFF)modules,while the balanced classification mosaic(BCM)enhanced detection of minority classes.With test-time augmentation(TTA),mAP50 improved by an additional 2.06%,reaching 84.71%.At the second fine-grained classification stage,each of the six broad classes from the first stage is further classified using individual ResNet50 models.Online data augmentation and transfer learning were employed to significantly enhance generalization.Compared with the baseline YOLOv6,the two-stage cascaded method improved recall by 4.06%,precision by 3.79%,and the F1-score by 3.92%.Overall,RiceInsectID achieved 82.85%recall,80.62%precision,and an F1-score of 81.72%,demonstrating an efficient and practical solution for monitoring tiny rice pests and their natural predators in paddy fields.This study provides valuable insights for ecosystem monitoring and supporting sustainable pest management in rice agriculture.
文摘With the iteration and upgrading of medical technology and the continuous growth of public health demands,the quality of nursing services has become a core indicator for measuring the effectiveness of the medical system.The clinical practice ability of nursing staff is directly related to the safety of patient diagnosis and treatment and the rehabilitation process.However,the current clinical nursing talent training model is facing bottlenecks such as limited practical scenarios and fragmented case cognition.This study focuses on the teaching application of augmented reality(AR)technology in hospital Settings and systematically reviews the research progress on the improvement of clinical practice ability of trainee nurses based on the AR immersive teaching model.By constructing a clinical teaching scenario that integrates virtual and real,AR technology can dynamically simulate complex case handling processes and enhance nursing students’three-dimensional cognition of condition assessment,operation norms,and emergency plans.Hospitals,as the core base for practical teaching,can effectively shorten the connection cycle between theoretical teaching and clinical practice by integrating AR technology,improve the clinical practice level of trainee nurses,and provide an innovative model for optimizing the path of clinical nursing talent cultivation.
基金Supported by The Hunan Provincial Natural Science Foundation of China,No.2023JJ30773,No.2025JJ60480,and No.2025JJ60552The Scientific Research Program of The Hunan Provincial Health Commission,No.202204072544+4 种基金The Science and Technology Innovation Program of Hunan Province,No.2024RC3053The CBT ECR/MCR Scheme,No.324910-0028/07National Natural Science Foundation of China,No.32300652The Scientific Research Program of Hunan Provincial Health Commission,No.W20243023The Scientific Research Launch Project for New Employees of The Second Xiangya Hospital of Central South University.
文摘Augmented reality(AR)is a technology that superimposes digital information onto real-world objects via head-mounted display devices to improve surgical finesse through visually enhanced medical information.With the rapid development of digital technology,AR has been increasingly adopted in orthopedic surgeries across the globe,especially in total knee arthroplasty procedures which demand high precision.By overlaying digital information onto the surgeon's field of view,AR systems enhance precision,improve alignment accuracy,and reduce the risk of complications associated with malalignment.Some concerns have been raised despite accuracy,including the learning curve,long-term outcomes,and technical limitations.Furthermore,it is essential for health practitioners to gain trust in the utilisation of AR.
文摘目的:探讨膜肾方对特发性膜性肾病大鼠血浆诱导损伤足细胞的干预作用及其机制。方法:建立特发性膜性肾病大鼠模型,用肝素钠作为抗凝剂收集其血浆样品并诱导足细胞损伤,分对照组、模型组、膜肾方组、膜肾方+C3a受体(C3aR)拮抗剂组、C3aR拮抗剂组。采用Western blotting检测各组足细胞C3aR、磷脂酶A2受体(PLA2R)、磷酸化细胞外信号调节激酶1/2(p-ERK1/2)、磷酸化细胞浆型磷脂酶A2(p-cPLA2)蛋白表达水平;酶联免疫吸附试验(ELISA)检测上清液C3a表达水平;Real-time PCR测定Synaptopodin mRNA、C3aR m RNA、PLA2R mRNA表达水平;细胞计数试剂盒-8(CCK-8)检测各组足细胞活力。结果:与对照组比较,模型组足细胞C3aR、PLA2R、p-ERK1/2、p-cPLA2表达水平均升高,上清液C3a水平升高,Synaptopodin m RNA水平下降,C3aR mRNA、PLA2R mRNA水平升高,足细胞活力下降,差异均有统计学意义(P<0.01);与模型组比较,膜肾方组足细胞C3aR、PLA2R、p-ERK1/2、p-cPLA2表达水平均下降,上清液C3a水平下降,Synaptopodin m RNA水平升高,C3aR mRNA、PLA2R mRNA水平下降,足细胞活力改善,差异均有统计学意义(P<0.01);与膜肾方组比较,膜肾方+C3aR拮抗剂组及C3aR拮抗剂组足细胞C3aR、PLA2R、p-ERK1/2、p-cPLA2表达水平均下降,上清液C3a水平下降,Synaptopodin mRNA水平升高,C3aR m RNA、PLA2R mRNA水平下降,足细胞活力改善,膜肾方+C3aR拮抗剂组更明显,差异均有统计学意义(P<0.01)。结论:膜肾方可能通过调控C3a/C3aR通路,下调PLA2R水平,稳定足细胞骨架,改善足细胞活力,从而发挥对足细胞的保护作用。
