Smart education is the future and development direction of higher education.Taking the graduate course Crime and Police Theory as the research subject,the shortcomings of smart education,which include the lack of unde...Smart education is the future and development direction of higher education.Taking the graduate course Crime and Police Theory as the research subject,the shortcomings of smart education,which include the lack of understanding of the concept of smart education,the limited content structure of smart education,the poor cognition of smart education among teachers and students,and inadequate hardware and technical support for smart education,are systematically analyzed.In view of these shortcomings,several strategies are proposed,including improving the smart education curriculum development plan and management level,ensuring the construction quality of smart education projects,and raising funds for smart education construction from various sources.展开更多
The element with the strongest electropositivity,Cs,was introduced into an anionic framework[Ga_(9)S_(16)]5−constructed from GaS4 tetrahedra,which are functional nonlinear optical motifs,to acquire the ternary noncent...The element with the strongest electropositivity,Cs,was introduced into an anionic framework[Ga_(9)S_(16)]5−constructed from GaS4 tetrahedra,which are functional nonlinear optical motifs,to acquire the ternary noncentrosymmetric sulphide Cs_(5)Ga_(9)S_(16)through solid-state reaction in a silica tube.Similar to classic LiGaS_(2),the three-dimensional phase Cs_(5)Ga_(9)S_(16)displayed prominent nonlinear optical performance,such as second-harmonic generation intensity(equal to LiGaS_(2))with phase-matching behaviour under incident laser irradiation at 1064 and 1910 nm,a wide band gap(3.81 eV)for a high laser-induced damage threshold(equal to LiGaS_(2)@1064 nm),and broad infrared transmittance transparency.Importantly,the Li-free Cs_(5)Ga_(9)S_(16)avoided the problem of corrosiveness to silica tubes at high temperatures similar to LiGaS_(2),suggesting that Cs_(5)Ga_(9)S_(16)could be a promising candidate for infrared nonlinear optical applications.展开更多
基金supported by the“Postgraduate Research&Practice Innovation Program of Jiangsu Province”(No.JGKT22_C053)and“Qinglan Project”for Jiangsu Province.
文摘Smart education is the future and development direction of higher education.Taking the graduate course Crime and Police Theory as the research subject,the shortcomings of smart education,which include the lack of understanding of the concept of smart education,the limited content structure of smart education,the poor cognition of smart education among teachers and students,and inadequate hardware and technical support for smart education,are systematically analyzed.In view of these shortcomings,several strategies are proposed,including improving the smart education curriculum development plan and management level,ensuring the construction quality of smart education projects,and raising funds for smart education construction from various sources.
基金supported by the National Natural Science Foundation of China(Grant No.21827813,21921001,22175172,22075283,92161125)the Youth Innovation Promotion Association of Chinese Academy of Sciences(Grant No.2020303,2021300)+1 种基金the Natural Science Foundation of Fujian Provinces,China(Grant No.2020J01115)Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China(Grant no.2021ZR205).
文摘The element with the strongest electropositivity,Cs,was introduced into an anionic framework[Ga_(9)S_(16)]5−constructed from GaS4 tetrahedra,which are functional nonlinear optical motifs,to acquire the ternary noncentrosymmetric sulphide Cs_(5)Ga_(9)S_(16)through solid-state reaction in a silica tube.Similar to classic LiGaS_(2),the three-dimensional phase Cs_(5)Ga_(9)S_(16)displayed prominent nonlinear optical performance,such as second-harmonic generation intensity(equal to LiGaS_(2))with phase-matching behaviour under incident laser irradiation at 1064 and 1910 nm,a wide band gap(3.81 eV)for a high laser-induced damage threshold(equal to LiGaS_(2)@1064 nm),and broad infrared transmittance transparency.Importantly,the Li-free Cs_(5)Ga_(9)S_(16)avoided the problem of corrosiveness to silica tubes at high temperatures similar to LiGaS_(2),suggesting that Cs_(5)Ga_(9)S_(16)could be a promising candidate for infrared nonlinear optical applications.
