With the continuous advancement of construction of urban communities and the continuous development of the needs of community residents in China,non-profit organizations in various urban communities have developed rap...With the continuous advancement of construction of urban communities and the continuous development of the needs of community residents in China,non-profit organizations in various urban communities have developed rapidly and have increasingly played an important role in social and economic life. At present,the development of non-profit organizations in urban communities is still faced with many problems,such as difficulty in raising funds,lack of incentives that results in low enthusiasm for volunteering and low participation of community residents,etc. It is urgent and practical significance to study,analyze and solve the problems faced by non-profit organizations in urban communities. That article focuses on the analysis and discussion of the problems facing the development of non-profit organizations in urban communities,and proposes countermeasures to solve the problems.展开更多
A pioneering glass-compatible transparent temperature alarm system self-powered by luminescent solar concentrators(LSCs) is reported.Single green-emitted organic manganese halides(OMHs) of PEA_(2)MnBr_(2)I_(2),which h...A pioneering glass-compatible transparent temperature alarm system self-powered by luminescent solar concentrators(LSCs) is reported.Single green-emitted organic manganese halides(OMHs) of PEA_(2)MnBr_(2)I_(2),which has a unique temperature-dependent backward energy transfer process from selftrapped state to^(4)T_(1)energy level of Mn,is used for triggering the temperature alarm.The LSC with redemitted CsPbI_(3)perovskite-polymer composite films on the glass substrate is used for power supply.The spectrally separated nature between the green-emitted OMHs for temperature alarm and red-emitted CsPbI3in LSC for power supply allows for probing the signal light of temperature-responsive OMHs without the interference of LSCs,making it possible to calibrate the temperature visually just by a self-powered brightness detection circuit with LED indicators.Taking advantage of LSC without hot spot effects plaguing the solar cells,as-prepared temperature alarm system can operate well on both sunny and cloudy day.展开更多
文摘With the continuous advancement of construction of urban communities and the continuous development of the needs of community residents in China,non-profit organizations in various urban communities have developed rapidly and have increasingly played an important role in social and economic life. At present,the development of non-profit organizations in urban communities is still faced with many problems,such as difficulty in raising funds,lack of incentives that results in low enthusiasm for volunteering and low participation of community residents,etc. It is urgent and practical significance to study,analyze and solve the problems faced by non-profit organizations in urban communities. That article focuses on the analysis and discussion of the problems facing the development of non-profit organizations in urban communities,and proposes countermeasures to solve the problems.
基金supported by the Natural Science Foundation of China(22075043,21875034,61704093)。
文摘A pioneering glass-compatible transparent temperature alarm system self-powered by luminescent solar concentrators(LSCs) is reported.Single green-emitted organic manganese halides(OMHs) of PEA_(2)MnBr_(2)I_(2),which has a unique temperature-dependent backward energy transfer process from selftrapped state to^(4)T_(1)energy level of Mn,is used for triggering the temperature alarm.The LSC with redemitted CsPbI_(3)perovskite-polymer composite films on the glass substrate is used for power supply.The spectrally separated nature between the green-emitted OMHs for temperature alarm and red-emitted CsPbI3in LSC for power supply allows for probing the signal light of temperature-responsive OMHs without the interference of LSCs,making it possible to calibrate the temperature visually just by a self-powered brightness detection circuit with LED indicators.Taking advantage of LSC without hot spot effects plaguing the solar cells,as-prepared temperature alarm system can operate well on both sunny and cloudy day.