Background Physical entity interactions in mixed reality(MR)environments aim to harness human capabilities in manipulating physical objects,thereby enhancing virtual environment(VEs)functionality.In MR,a common strate...Background Physical entity interactions in mixed reality(MR)environments aim to harness human capabilities in manipulating physical objects,thereby enhancing virtual environment(VEs)functionality.In MR,a common strategy is to use virtual agents as substitutes for physical entities,balancing interaction efficiency with environmental immersion.However,the impact of virtual agent size and form on interaction performance remains unclear.Methods Two experiments were conducted to explore how virtual agent size and form affect interaction performance,immersion,and preference in MR environments.The first experiment assessed five virtual agent sizes(25%,50%,75%,100%,and 125%of physical size).The second experiment tested four types of frames(no frame,consistent frame,half frame,and surrounding frame)across all agent sizes.Participants,utilizing a head mounted display,performed tasks involving moving cups,typing words,and using a mouse.They completed questionnaires assessing aspects such as the virtual environment effects,interaction effects,collision concerns,and preferences.Results Results from the first experiment revealed that agents matching physical object size produced the best overall performance.The second experiment demonstrated that consistent framing notably enhances interaction accuracy and speed but reduces immersion.To balance efficiency and immersion,frameless agents matching physical object sizes were deemed optimal.Conclusions Virtual agents matching physical entity sizes enhance user experience and interaction performance.Conversely,familiar frames from 2D interfaces detrimentally affect interaction and immersion in virtual spaces.This study provides valuable insights for the future development of MR systems.展开更多
At the beginning of 2024,Liu Yunzhi,President of China National Opera House,and nearly 50 artists from the Opera troupe,Choir and Symphony of the Opera House held"Happy Chinese New Year"concerts in Latvia,Uz...At the beginning of 2024,Liu Yunzhi,President of China National Opera House,and nearly 50 artists from the Opera troupe,Choir and Symphony of the Opera House held"Happy Chinese New Year"concerts in Latvia,Uzbekistan and Austria,in"the simplest and most friendly way to convey the sound of cultural exchanges",which added impetus to the cultural exchanges between China and the world.展开更多
From both historical and artistic points of view,Qinqiang Opera can be considered a significant genre outside the realms of Peking Opera and Kunqu Opera.The research on Qinqiang Opera has long been a focal point in th...From both historical and artistic points of view,Qinqiang Opera can be considered a significant genre outside the realms of Peking Opera and Kunqu Opera.The research on Qinqiang Opera has long been a focal point in the research on local operas with particular emphasis from a local perspective of the Yisu Art Troupe,a key and hot topic in the studies of Qinqiang Opera.Taking the Yisu Art Troupe as a case study to scrutinize and address the intricacies within the process of modernization of traditional Chinese opera proved to be beneficial.Since the 20th century,studies on the Yisu Art Troupe have evolved from scattered and impressionistic self-narratives into systematic and theoretical academic research.In the new century,scholars,such as Xin Xuefeng,Li Youjun,and Guo Hongjun,have been especially diligent with studies in this field.As Xin Xuefeng is relatively unknown due to his emphasis on traditional opera music,Li Youjun and Guo Hongjun have gradually emerged as important contemporary scholars in the study of the Yisu Art Troupe.Guo and Li not only further theorize the study of the Yisu Art Troupe but also conduct in-depth and meticulous studies on the nature of the Yisu Art Troupe,the establishment of the director-centered mode in Qinqiang Opera,the social function,and the playwriting of the Yisu Art Troupe by examining and reflecting it within the broader context of the modernization of traditional Chinese opera in the 20th century.展开更多
AIM:To evaluate the diagnostic value of panoramic immersion B-scan ultrasonography(Pano-immersion B-scan,PIB)in complex retinal detachment(RD),persistent hyperplastic primary vitreous(PHPV)and intraocular tumors.METHO...AIM:To evaluate the diagnostic value of panoramic immersion B-scan ultrasonography(Pano-immersion B-scan,PIB)in complex retinal detachment(RD),persistent hyperplastic primary vitreous(PHPV)and intraocular tumors.METHODS:The clinical data of 44 patients collected from May 2012 to December 2019 in Chinese PLA General Hospital was retrospectively studied.All of these patients underwent PIB of the eye,because it was difficult to diagnose by routine ocular fundus examination,conventional ultrasound or/and ultrasonic biomicroscope(UBM)due to opacity of refractive media,pupillary occlusion,large involvement or special location of the lesion.The imaging features of difficult cases in PIB were analyzed.The diagnosis accuracy rating of PIB were evaluated and contrasted with conventional ultrasound or UBM by the standard of intraoperative diagnosis or/and pathological results.RESULTS:According to intraoperative diagnosis or pathological results as gold standard,among the 44 cases,there were 19 cases missed diagnosis,misdiagnosed or difficult-to-diagnose by conventional ultrasound or UBM,including 4 cases of long-standing RD difficult to diagnose,4 cases misdiagnosed,and 11 cases incompletely observed or miss diagnosed.The diagnostic accuracy rate of PIB and conventional ultrasound or UBM were 100%(44/44)and 56.82%(25/44),and the sensitivity of them were 100%and 56.82%.All the patients underwent PIB and were diagnosed as RD(15 cases),retinal and choroidal detachment(4 cases),subchoroidal hematocele(1 case),vitreous opacity and/or organic membrane formation(4 cases),PHPV(12 cases),iris and/or ciliary body tumors(3 cases),and choroidal tumors(6 cases).According to the intraoperative diagnosis or pathological results,the diagnostic coincidence rate of PIB was 100%,which was significantly higher than conventional ultrasound and UBM.CONCLUSION:PIB can help to accurately diagnose complex RD,PHPV,and intraocular masses with special location or/and excessive size.It has important diagnostic value for patients with equivocal findings at conventional ultrasound examination.展开更多
Super-resolution imaging with superlens has been one of the fundamental research topics. Unfortunately, the resolution of superlens is inevitably restrained by material loss. To address the problem, we introduce the s...Super-resolution imaging with superlens has been one of the fundamental research topics. Unfortunately, the resolution of superlens is inevitably restrained by material loss. To address the problem, we introduce the solid immersion mechanism into the slab superlens and the cylindrical superlens. The proposed solid immersion slab superlens(SISSL) and the solid immersion cylindrical superlens(SICSL) can improve the resolution by converting evanescent wave to propagating wave using high refractive index materials. From the perspective of applications, the cylindrical superlens with finite cross section and the ability of magnification or demagnification has more advantages than the slab superlens. Therefore,we focus on demonstrating analytically the super-resolution imaging of SICSL. Due to the impedance mismatching caused by solid immersion mechanism, the whispering gallery modes(WGMs) are excited between SICSL and the air interface.We clarify the excitation conditions of WGMs and analyze their influence on the imaging quality of SICSL. The SISSL and SICSL may pave a way to apply in lithography technique and real-time biomolecular imaging in future.展开更多
The traditional musical instrument of minorities converges the evolution of ethnic group culture and history,and ethnic musical instruments are a core component of minority culture.The traditional instruments of Guang...The traditional musical instrument of minorities converges the evolution of ethnic group culture and history,and ethnic musical instruments are a core component of minority culture.The traditional instruments of Guangxi minorities are rich and varied,and an all-round cultural inheritance and protection mechanism should be used for ethnic musical instruments,so that the performance form of classical musical instruments of minorities can be more widely understood and mastered.Therefore,in this paper,we discuss the specific practice idea of the inheritance and development of classical musical instruments of Guangxi minorities,and facilitate the innovation of development path of ethnic musical instruments by taking the inheritance form of integrating musical instruments with operas.展开更多
A five-member women’s singing group is trying to revive flagging interest in Peking Opera by combining opera with pop elements.THEY come from different places and have different backgrounds, but they have one thing i...A five-member women’s singing group is trying to revive flagging interest in Peking Opera by combining opera with pop elements.THEY come from different places and have different backgrounds, but they have one thing in common-the number 416. That was the number of the dormitory room assigned to them when they enrolled at the Shanghai Theater Academy as young aspiring singers, and today, it’s also the name of their band-the 416 Girls Group, that has become a singing sensation.展开更多
With the advent of the information age,augmented reality technology can enhance the sense of reality in the virtual world and immerse people in the real and virtual world.People have always been interested in virtual ...With the advent of the information age,augmented reality technology can enhance the sense of reality in the virtual world and immerse people in the real and virtual world.People have always been interested in virtual space or augmented reality technology,especially in the face of historical development trends.Museums have always been open to the public,they are not just a collection,but also an exhibition for the public.Through analyzing different museums,it is found that museums with augmented reality technology exhibitions are non-profit museums for the purpose of emotional experience.In order to find out the immersion factors of virtual reality in museums,on the basis of previous research,this paper divides immersion in augmented reality into story immersion,five-sense experience immersion,and spatial interaction immersion.Through the analysis of different museums,it is found that immersion through five-sense experience is the most commonly used method when all display media are included.This method provides educational content for museum visitors and projects virtual presentations through monitors and portable IT devices,thereby increasing visitors’viewing pleasure.展开更多
Recently, Popa and Rata [27, 28] have shown the （in）stability of some classical operators defined on [0, 1] and found best constant when the positive linear operators are stable in the sense of Hyers-Ularn. In this ...Recently, Popa and Rata [27, 28] have shown the （in）stability of some classical operators defined on [0, 1] and found best constant when the positive linear operators are stable in the sense of Hyers-Ularn. In this paper we show Hyers-Ulam （in）stability of complex Bernstein-Schurer operators, complex Kantrovich-Schurer operators and Lorentz operators on compact disk. In the case when the operator is stable in the sense of Hyers and Ulam, we find the infimum of Hyers-Ulam stability constants for respective operators.展开更多
In this article, the authors consider the weighted bounds for the singular integral operator defined by TAf(x)=p.v.∫Rn Ω(x-y)/|x-y|n+1(A(x)-A(y)-▽A(y))f(y)dy,where Ω is homogeneous of degree zero and has vanishing...In this article, the authors consider the weighted bounds for the singular integral operator defined by TAf(x)=p.v.∫Rn Ω(x-y)/|x-y|n+1(A(x)-A(y)-▽A(y))f(y)dy,where Ω is homogeneous of degree zero and has vanishing moment of order one, and A is a function on Rn such that ▽A ∈ BMO(R^n). By sparse domination, the authors obtain some qua nt itative weighted bounds for Ta when Q satisfies regularity condition of L^τ-Dini type for some r∈(1,∞).展开更多
基金the Strategic research and consulting project of Chinese Academy of Engineering(2023-HY-14).
文摘Background Physical entity interactions in mixed reality(MR)environments aim to harness human capabilities in manipulating physical objects,thereby enhancing virtual environment(VEs)functionality.In MR,a common strategy is to use virtual agents as substitutes for physical entities,balancing interaction efficiency with environmental immersion.However,the impact of virtual agent size and form on interaction performance remains unclear.Methods Two experiments were conducted to explore how virtual agent size and form affect interaction performance,immersion,and preference in MR environments.The first experiment assessed five virtual agent sizes(25%,50%,75%,100%,and 125%of physical size).The second experiment tested four types of frames(no frame,consistent frame,half frame,and surrounding frame)across all agent sizes.Participants,utilizing a head mounted display,performed tasks involving moving cups,typing words,and using a mouse.They completed questionnaires assessing aspects such as the virtual environment effects,interaction effects,collision concerns,and preferences.Results Results from the first experiment revealed that agents matching physical object size produced the best overall performance.The second experiment demonstrated that consistent framing notably enhances interaction accuracy and speed but reduces immersion.To balance efficiency and immersion,frameless agents matching physical object sizes were deemed optimal.Conclusions Virtual agents matching physical entity sizes enhance user experience and interaction performance.Conversely,familiar frames from 2D interfaces detrimentally affect interaction and immersion in virtual spaces.This study provides valuable insights for the future development of MR systems.
文摘At the beginning of 2024,Liu Yunzhi,President of China National Opera House,and nearly 50 artists from the Opera troupe,Choir and Symphony of the Opera House held"Happy Chinese New Year"concerts in Latvia,Uzbekistan and Austria,in"the simplest and most friendly way to convey the sound of cultural exchanges",which added impetus to the cultural exchanges between China and the world.
基金funded by the National Social Science Fund of China’s project“Research on the Modernization Construction of Chinese Drama Theory in the 20th Century”(Approval Number:19BZW098)。
文摘From both historical and artistic points of view,Qinqiang Opera can be considered a significant genre outside the realms of Peking Opera and Kunqu Opera.The research on Qinqiang Opera has long been a focal point in the research on local operas with particular emphasis from a local perspective of the Yisu Art Troupe,a key and hot topic in the studies of Qinqiang Opera.Taking the Yisu Art Troupe as a case study to scrutinize and address the intricacies within the process of modernization of traditional Chinese opera proved to be beneficial.Since the 20th century,studies on the Yisu Art Troupe have evolved from scattered and impressionistic self-narratives into systematic and theoretical academic research.In the new century,scholars,such as Xin Xuefeng,Li Youjun,and Guo Hongjun,have been especially diligent with studies in this field.As Xin Xuefeng is relatively unknown due to his emphasis on traditional opera music,Li Youjun and Guo Hongjun have gradually emerged as important contemporary scholars in the study of the Yisu Art Troupe.Guo and Li not only further theorize the study of the Yisu Art Troupe but also conduct in-depth and meticulous studies on the nature of the Yisu Art Troupe,the establishment of the director-centered mode in Qinqiang Opera,the social function,and the playwriting of the Yisu Art Troupe by examining and reflecting it within the broader context of the modernization of traditional Chinese opera in the 20th century.
文摘AIM:To evaluate the diagnostic value of panoramic immersion B-scan ultrasonography(Pano-immersion B-scan,PIB)in complex retinal detachment(RD),persistent hyperplastic primary vitreous(PHPV)and intraocular tumors.METHODS:The clinical data of 44 patients collected from May 2012 to December 2019 in Chinese PLA General Hospital was retrospectively studied.All of these patients underwent PIB of the eye,because it was difficult to diagnose by routine ocular fundus examination,conventional ultrasound or/and ultrasonic biomicroscope(UBM)due to opacity of refractive media,pupillary occlusion,large involvement or special location of the lesion.The imaging features of difficult cases in PIB were analyzed.The diagnosis accuracy rating of PIB were evaluated and contrasted with conventional ultrasound or UBM by the standard of intraoperative diagnosis or/and pathological results.RESULTS:According to intraoperative diagnosis or pathological results as gold standard,among the 44 cases,there were 19 cases missed diagnosis,misdiagnosed or difficult-to-diagnose by conventional ultrasound or UBM,including 4 cases of long-standing RD difficult to diagnose,4 cases misdiagnosed,and 11 cases incompletely observed or miss diagnosed.The diagnostic accuracy rate of PIB and conventional ultrasound or UBM were 100%(44/44)and 56.82%(25/44),and the sensitivity of them were 100%and 56.82%.All the patients underwent PIB and were diagnosed as RD(15 cases),retinal and choroidal detachment(4 cases),subchoroidal hematocele(1 case),vitreous opacity and/or organic membrane formation(4 cases),PHPV(12 cases),iris and/or ciliary body tumors(3 cases),and choroidal tumors(6 cases).According to the intraoperative diagnosis or pathological results,the diagnostic coincidence rate of PIB was 100%,which was significantly higher than conventional ultrasound and UBM.CONCLUSION:PIB can help to accurately diagnose complex RD,PHPV,and intraocular masses with special location or/and excessive size.It has important diagnostic value for patients with equivocal findings at conventional ultrasound examination.
基金Project supported by the National Key Research and Development Program of China (Grant No. 2020YFA0710100)the National Natural Science Foundation of China (Grant Nos. 92050102 and 11874311)the Fundamental Research Funds for the Central Universities (Grant Nos. 20720220033 and 20720200074)。
文摘Super-resolution imaging with superlens has been one of the fundamental research topics. Unfortunately, the resolution of superlens is inevitably restrained by material loss. To address the problem, we introduce the solid immersion mechanism into the slab superlens and the cylindrical superlens. The proposed solid immersion slab superlens(SISSL) and the solid immersion cylindrical superlens(SICSL) can improve the resolution by converting evanescent wave to propagating wave using high refractive index materials. From the perspective of applications, the cylindrical superlens with finite cross section and the ability of magnification or demagnification has more advantages than the slab superlens. Therefore,we focus on demonstrating analytically the super-resolution imaging of SICSL. Due to the impedance mismatching caused by solid immersion mechanism, the whispering gallery modes(WGMs) are excited between SICSL and the air interface.We clarify the excitation conditions of WGMs and analyze their influence on the imaging quality of SICSL. The SISSL and SICSL may pave a way to apply in lithography technique and real-time biomolecular imaging in future.
文摘The traditional musical instrument of minorities converges the evolution of ethnic group culture and history,and ethnic musical instruments are a core component of minority culture.The traditional instruments of Guangxi minorities are rich and varied,and an all-round cultural inheritance and protection mechanism should be used for ethnic musical instruments,so that the performance form of classical musical instruments of minorities can be more widely understood and mastered.Therefore,in this paper,we discuss the specific practice idea of the inheritance and development of classical musical instruments of Guangxi minorities,and facilitate the innovation of development path of ethnic musical instruments by taking the inheritance form of integrating musical instruments with operas.
文摘A five-member women’s singing group is trying to revive flagging interest in Peking Opera by combining opera with pop elements.THEY come from different places and have different backgrounds, but they have one thing in common-the number 416. That was the number of the dormitory room assigned to them when they enrolled at the Shanghai Theater Academy as young aspiring singers, and today, it’s also the name of their band-the 416 Girls Group, that has become a singing sensation.
文摘With the advent of the information age,augmented reality technology can enhance the sense of reality in the virtual world and immerse people in the real and virtual world.People have always been interested in virtual space or augmented reality technology,especially in the face of historical development trends.Museums have always been open to the public,they are not just a collection,but also an exhibition for the public.Through analyzing different museums,it is found that museums with augmented reality technology exhibitions are non-profit museums for the purpose of emotional experience.In order to find out the immersion factors of virtual reality in museums,on the basis of previous research,this paper divides immersion in augmented reality into story immersion,five-sense experience immersion,and spatial interaction immersion.Through the analysis of different museums,it is found that immersion through five-sense experience is the most commonly used method when all display media are included.This method provides educational content for museum visitors and projects virtual presentations through monitors and portable IT devices,thereby increasing visitors’viewing pleasure.
文摘Recently, Popa and Rata [27, 28] have shown the （in）stability of some classical operators defined on [0, 1] and found best constant when the positive linear operators are stable in the sense of Hyers-Ularn. In this paper we show Hyers-Ulam （in）stability of complex Bernstein-Schurer operators, complex Kantrovich-Schurer operators and Lorentz operators on compact disk. In the case when the operator is stable in the sense of Hyers and Ulam, we find the infimum of Hyers-Ulam stability constants for respective operators.
基金supported by Teacher Research Capacity Promotion Program of Beijing Normal University ZhuhaiNNSF of China under Grant#11461065supported by the NNSF of China under grant#11871108
文摘In this article, the authors consider the weighted bounds for the singular integral operator defined by TAf(x)=p.v.∫Rn Ω(x-y)/|x-y|n+1(A(x)-A(y)-▽A(y))f(y)dy,where Ω is homogeneous of degree zero and has vanishing moment of order one, and A is a function on Rn such that ▽A ∈ BMO(R^n). By sparse domination, the authors obtain some qua nt itative weighted bounds for Ta when Q satisfies regularity condition of L^τ-Dini type for some r∈(1,∞).
