In recent years,three-dimensional reconstruction technologies that employ multiple cameras have continued to evolve significantly,enabling remote collaboration among users in extended Reality(XR)environments.In additi...In recent years,three-dimensional reconstruction technologies that employ multiple cameras have continued to evolve significantly,enabling remote collaboration among users in extended Reality(XR)environments.In addition,methods for deploying multiple cameras for motion capture of users(e.g.,performers)are widely used in computer graphics.As the need to minimize and optimize the number of cameras grows to reduce costs,various technologies and research approaches focused on Optimal Camera Placement(OCP)are continually being proposed.However,as most existing studies assume homogeneous camera setups,there is a growing demand for studies on heterogeneous camera setups.For instance,technical demands keep emerging in scenarios with minimal camera configurations,especially regarding cost factors,the physical placement of cameras given the spatial structure,and image capture strategies for heterogeneous cameras,such as high-resolution RGB cameras and depth cameras.In this study,we propose a pre-visualization and simulation method for the optimal placement of heterogeneous cameras in XR environments,accounting for both the specifications of heterogeneous cameras(e.g.,field of view)and the physical configuration(e.g.,wall configuration)in real-world spaces.The proposed method performs a visibility analysis of cameras by considering each camera’s field-of-view volume,resolution,and unique characteristics,along with physicalspace constraints.This approach enables the optimal position and rotation of each camera to be recommended,along with the minimum number of cameras required.In the results of our study conducted in heterogeneous camera combinations,the proposed method achieved 81.7%~82.7%coverage of the target visual information using only 2~3 cameras.In contrast,single(or homogeneous)-typed cameras were required to use 11 cameras for 81.6%coverage.Accordingly,we found that camera deployment resources can be reduced with the proposed approaches.展开更多
In addition to the hexagonal crystals of class 6 mm, many piezoelectric materials （e.g., BaTiO3）, piezomagnetic materials （e.g., CoFe2O4）, and multiferroic com-posite materials （e.g., BaTiO3-CoFe2O4 composites）...In addition to the hexagonal crystals of class 6 mm, many piezoelectric materials （e.g., BaTiO3）, piezomagnetic materials （e.g., CoFe2O4）, and multiferroic com-posite materials （e.g., BaTiO3-CoFe2O4 composites） also exhibit symmetry of transverse isotropy after poling, with the isotropic plane perpendicular to the poling direction. In this paper, simple and elegant line-integral expressions are derived for extended displace-ments, extended stresses, self-energy, and interaction energy of arbitrarily shaped, three-dimensional （3D） dislocation loops with a constant extended Burgers vector in trans-versely isotropic magneto-electro-elastic （MEE） bimaterials （i.e., joined half-spaces）. The derived solutions can also be simply reduced to those expressions for piezoelectric, piezo-magnetic, or purely elastic materials. Several numerical examples are given to show both the multi-field coupling effect and the interface/surface effect in transversely isotropic MEE materials.展开更多
In order to explore the mechanism of improving the surface wettability of low-energy polytetrafluoroethylene(PTFE)by new extended surfactants,five kinds of extended anionic surfactants with different numbers of oxypro...In order to explore the mechanism of improving the surface wettability of low-energy polytetrafluoroethylene(PTFE)by new extended surfactants,five kinds of extended anionic surfactants with different numbers of oxypropylene(PO)and oxyethylene(EO),octadecyl-(PO)_(m)-(EO)_(n)-sodium carboxylate(C_(18)PO_(m)EO_(n)C,m=5,10,15,n=5,10,15),were studied.The surface tension and contact angle of C_(18)PO_(m)EO_(n)C solution with different concentrations were measured,and the adhesion tension,PTFE-water interfacial tension,and adhesion work were calculated.It was found that the extended surfactant molecules adsorb on the surface of the solution and the PTFE-liquid interface simultaneously when the concentration is lower than the critical micelle concentration(cmc),and there was a linear relationship between surface tension and adhesion tension.The adsorption amount of C_(18)PO_(m)EO_(n)C at the PTFE-water interface was significantly lower than that on the surface of the solution.As the concentration increases above cmc,semi-micelle aggregates on the surface of PTFE are formed by C_(18)PO_(m)EO_(n)C molecules through hydrophobic interaction,and the hydrophilic group faces the solution to modify the surface of PTFE with high efficiency.展开更多
为了完成进化动力反应堆(Evolutionary Power Reactor,EPR)压力容器单体顶盖的水压密封试验,设计一套专用的水压密封工装。介绍该工装的设计要求、结构特性和材料选用,并应用ABAQUS软件对关键部件在水压工况下的应力进行校核计算。实际...为了完成进化动力反应堆(Evolutionary Power Reactor,EPR)压力容器单体顶盖的水压密封试验,设计一套专用的水压密封工装。介绍该工装的设计要求、结构特性和材料选用,并应用ABAQUS软件对关键部件在水压工况下的应力进行校核计算。实际应用结果表明,该密封工装的性能能够满足水压试验设计要求。展开更多
The issue of continental shelf beyond 200 nautical miles relating to ridges is one of the most complex and contentious parts of UNCLOS Article 76. A coastal State may greatly extend, by invoking the ridge provisions, ...The issue of continental shelf beyond 200 nautical miles relating to ridges is one of the most complex and contentious parts of UNCLOS Article 76. A coastal State may greatly extend, by invoking the ridge provisions, the outer limits of its extended continental shelf. Since the region of mid-oceanic ridges involves huge economic interests, it becomes a place that all coastal States want to claim in their scrambles for continental shelves. The coastal States’ intention to extend their continental shelves to the maximum extent by using the ridge provisions to their advantage would, necessarily, compromise the common interests of the humankind. Against this backdrop, we need to, for the purpose of protecting China’s maritime rights and interests, examine the typical submissions involving ridge provisions, and explore the principles for the application of ridge provisions.展开更多
Phantom limb pain(PLP)is not only a physical pain experience but also poses a significant challenge to mental health and quality of life.Currently,the mechanism of PLP treatment is still unclear,and there are many met...Phantom limb pain(PLP)is not only a physical pain experience but also poses a significant challenge to mental health and quality of life.Currently,the mechanism of PLP treatment is still unclear,and there are many methods with varying effects.This article starts with the application research of extended reality technology in PLP treatment,through describing the application of its branch technologies(virtual reality,augmented reality,and mixed reality technology),to lay the foundation for subsequent research,in the hope of finding advanced and effective treatment methods,and providing a basis for future product transformation.展开更多
Objective: to discuss the practical application value and effect of motivational interview nursing for patients with depression during treatment. Methods: 60 discharged patients with depression were randomly divided i...Objective: to discuss the practical application value and effect of motivational interview nursing for patients with depression during treatment. Methods: 60 discharged patients with depression were randomly divided into the control group and the study group, with 30 patients in both groups. The control group was given routine discharge nursing while the study group was given motivational interview type extended nursing. The scores of Social Support Rating Scale (SSRS), Life Satisfaction Rating (LSR) and recurrence rate of the two groups were observed at different time periods. Results: before the implementation of nursing, the SSRS and LSR scores of the two groups were compared (P > 0.05), and there was no statistical significance. After three months of nursing, the SSRS and LSR scores of the study group were higher than those of the control group (P < 0.05). There was no significant difference in recurrence rate between the two groups (P > 0.05). In the third month after the implementation, the recurrence rate of the two groups was significantly lower in the study group (P < 0.05), with statistical significance. Conclusion: in patients with depression, the implementation of motivational interview type extended care can stimulate the intrinsic motivation of patients' behavior changes, and strengthen the patients' rehabilitation beliefs and wishes;Improve patients' subjective feelings of social support and life satisfaction, make them face the reality bravely, laugh at life, and reduce disease recurrence.展开更多
基金supported by the 2024 Research Fund of University of Ulsan.
文摘In recent years,three-dimensional reconstruction technologies that employ multiple cameras have continued to evolve significantly,enabling remote collaboration among users in extended Reality(XR)environments.In addition,methods for deploying multiple cameras for motion capture of users(e.g.,performers)are widely used in computer graphics.As the need to minimize and optimize the number of cameras grows to reduce costs,various technologies and research approaches focused on Optimal Camera Placement(OCP)are continually being proposed.However,as most existing studies assume homogeneous camera setups,there is a growing demand for studies on heterogeneous camera setups.For instance,technical demands keep emerging in scenarios with minimal camera configurations,especially regarding cost factors,the physical placement of cameras given the spatial structure,and image capture strategies for heterogeneous cameras,such as high-resolution RGB cameras and depth cameras.In this study,we propose a pre-visualization and simulation method for the optimal placement of heterogeneous cameras in XR environments,accounting for both the specifications of heterogeneous cameras(e.g.,field of view)and the physical configuration(e.g.,wall configuration)in real-world spaces.The proposed method performs a visibility analysis of cameras by considering each camera’s field-of-view volume,resolution,and unique characteristics,along with physicalspace constraints.This approach enables the optimal position and rotation of each camera to be recommended,along with the minimum number of cameras required.In the results of our study conducted in heterogeneous camera combinations,the proposed method achieved 81.7%~82.7%coverage of the target visual information using only 2~3 cameras.In contrast,single(or homogeneous)-typed cameras were required to use 11 cameras for 81.6%coverage.Accordingly,we found that camera deployment resources can be reduced with the proposed approaches.
基金Project supported by the National Project of Scientific and Technical Supporting Programs Funded by Ministry of Science&Technology of China(No.2009BAG12A01-A03-2)the National Natural Science Foundation of China(Nos.10972196,11090333,11172273,and 11321202)
文摘In addition to the hexagonal crystals of class 6 mm, many piezoelectric materials （e.g., BaTiO3）, piezomagnetic materials （e.g., CoFe2O4）, and multiferroic com-posite materials （e.g., BaTiO3-CoFe2O4 composites） also exhibit symmetry of transverse isotropy after poling, with the isotropic plane perpendicular to the poling direction. In this paper, simple and elegant line-integral expressions are derived for extended displace-ments, extended stresses, self-energy, and interaction energy of arbitrarily shaped, three-dimensional （3D） dislocation loops with a constant extended Burgers vector in trans-versely isotropic magneto-electro-elastic （MEE） bimaterials （i.e., joined half-spaces）. The derived solutions can also be simply reduced to those expressions for piezoelectric, piezo-magnetic, or purely elastic materials. Several numerical examples are given to show both the multi-field coupling effect and the interface/surface effect in transversely isotropic MEE materials.
文摘In order to explore the mechanism of improving the surface wettability of low-energy polytetrafluoroethylene(PTFE)by new extended surfactants,five kinds of extended anionic surfactants with different numbers of oxypropylene(PO)and oxyethylene(EO),octadecyl-(PO)_(m)-(EO)_(n)-sodium carboxylate(C_(18)PO_(m)EO_(n)C,m=5,10,15,n=5,10,15),were studied.The surface tension and contact angle of C_(18)PO_(m)EO_(n)C solution with different concentrations were measured,and the adhesion tension,PTFE-water interfacial tension,and adhesion work were calculated.It was found that the extended surfactant molecules adsorb on the surface of the solution and the PTFE-liquid interface simultaneously when the concentration is lower than the critical micelle concentration(cmc),and there was a linear relationship between surface tension and adhesion tension.The adsorption amount of C_(18)PO_(m)EO_(n)C at the PTFE-water interface was significantly lower than that on the surface of the solution.As the concentration increases above cmc,semi-micelle aggregates on the surface of PTFE are formed by C_(18)PO_(m)EO_(n)C molecules through hydrophobic interaction,and the hydrophilic group faces the solution to modify the surface of PTFE with high efficiency.
文摘为了完成进化动力反应堆(Evolutionary Power Reactor,EPR)压力容器单体顶盖的水压密封试验,设计一套专用的水压密封工装。介绍该工装的设计要求、结构特性和材料选用,并应用ABAQUS软件对关键部件在水压工况下的应力进行校核计算。实际应用结果表明,该密封工装的性能能够满足水压试验设计要求。
基金the Marine Public Welfare Industry Research Project sponsored by State Oceanic Administration of China (201205003) and the Youth Program by the National Social Science Foundation of China (16CFX069).
文摘The issue of continental shelf beyond 200 nautical miles relating to ridges is one of the most complex and contentious parts of UNCLOS Article 76. A coastal State may greatly extend, by invoking the ridge provisions, the outer limits of its extended continental shelf. Since the region of mid-oceanic ridges involves huge economic interests, it becomes a place that all coastal States want to claim in their scrambles for continental shelves. The coastal States’ intention to extend their continental shelves to the maximum extent by using the ridge provisions to their advantage would, necessarily, compromise the common interests of the humankind. Against this backdrop, we need to, for the purpose of protecting China’s maritime rights and interests, examine the typical submissions involving ridge provisions, and explore the principles for the application of ridge provisions.
文摘Phantom limb pain(PLP)is not only a physical pain experience but also poses a significant challenge to mental health and quality of life.Currently,the mechanism of PLP treatment is still unclear,and there are many methods with varying effects.This article starts with the application research of extended reality technology in PLP treatment,through describing the application of its branch technologies(virtual reality,augmented reality,and mixed reality technology),to lay the foundation for subsequent research,in the hope of finding advanced and effective treatment methods,and providing a basis for future product transformation.
文摘Objective: to discuss the practical application value and effect of motivational interview nursing for patients with depression during treatment. Methods: 60 discharged patients with depression were randomly divided into the control group and the study group, with 30 patients in both groups. The control group was given routine discharge nursing while the study group was given motivational interview type extended nursing. The scores of Social Support Rating Scale (SSRS), Life Satisfaction Rating (LSR) and recurrence rate of the two groups were observed at different time periods. Results: before the implementation of nursing, the SSRS and LSR scores of the two groups were compared (P > 0.05), and there was no statistical significance. After three months of nursing, the SSRS and LSR scores of the study group were higher than those of the control group (P < 0.05). There was no significant difference in recurrence rate between the two groups (P > 0.05). In the third month after the implementation, the recurrence rate of the two groups was significantly lower in the study group (P < 0.05), with statistical significance. Conclusion: in patients with depression, the implementation of motivational interview type extended care can stimulate the intrinsic motivation of patients' behavior changes, and strengthen the patients' rehabilitation beliefs and wishes;Improve patients' subjective feelings of social support and life satisfaction, make them face the reality bravely, laugh at life, and reduce disease recurrence.
