The community is both a learning and living environment that significantly influences the physical and mental development of the children,as well as an important arena for realizing children’s rights.However,the deve...The community is both a learning and living environment that significantly influences the physical and mental development of the children,as well as an important arena for realizing children’s rights.However,the development of urban communities in China is not particularly child-friendly,causing children to abandon or misuse the communal environment.Creating a child-friendly environment in urban communities requires the adoption of three basic approaches,i.e.a shift from the"adult’s perspective"to the"child’s perspective",a shift from a simplistic focus on the"hardware"of the environment to a dual focus that balances both"hardware"and"software",as well as a shift from providing an environment to man aging and guiding the use of the environment.Specific technical indicators for developing child-friendly environments in urban communities,which based on these three approaches,should be designed.展开更多
This article explores the effects of doping ferroelectric materials MgTiO_(3) with different proportions on the properties of polyaniline(PANI).PANI/MgTiO_(3) composites were prepared by in-situ composite method.Fouri...This article explores the effects of doping ferroelectric materials MgTiO_(3) with different proportions on the properties of polyaniline(PANI).PANI/MgTiO_(3) composites were prepared by in-situ composite method.Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD)were used to characterize the structure of the composites.Scanning electron microscope(SEM)was used to characterize the morphology of the composites.The thermal stability of the composites was investigated by thermogravimetry(TG)and derivative thermogravimetry(DTG).Electrochemical methods(cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS),and constant current charge-discharge test)were used to compare and analyze the electrochemical performance of the composites.TG-DTG analysis and electrochemical experiments all show that the thermal stability and electrochemical properties of the PANI/MgTiO_(3) composite with a mass ratio of 82/18(w/w)are the best.The results indicate that there is a synergistic effect between PANI and MgTiO_(3),which improves the performances of the PANI when the appropriate amount of MgTiO_(3) is added.展开更多
Two kinds of noise strategies in binary opinion dynamics on ER random networks are discussed. Random noise p1 in the initial configuration plays a role in redistributing the opinion states associated with the network....Two kinds of noise strategies in binary opinion dynamics on ER random networks are discussed. Random noise p1 in the initial configuration plays a role in redistributing the opinion states associated with the network. Under synchronous updating, the system can attain a stable state within few time steps. The fraction of nodes with changed opinion states F decreases exponentially with time, and the ratio of one of the two opinion states R remains almost unchanged during the evolution. The average ratio <R> crosses at the half-half initial concentration under different p1. For noise in the dynamical evolution p2, the system can reach a steady state with small fluctuations. With larger p2, more nodes have changed opinion states at each updating and more nodes with opposite opinions coexist. If p2 is greater than 0.5, the two opinions coexist with equal support.展开更多
文摘The community is both a learning and living environment that significantly influences the physical and mental development of the children,as well as an important arena for realizing children’s rights.However,the development of urban communities in China is not particularly child-friendly,causing children to abandon or misuse the communal environment.Creating a child-friendly environment in urban communities requires the adoption of three basic approaches,i.e.a shift from the"adult’s perspective"to the"child’s perspective",a shift from a simplistic focus on the"hardware"of the environment to a dual focus that balances both"hardware"and"software",as well as a shift from providing an environment to man aging and guiding the use of the environment.Specific technical indicators for developing child-friendly environments in urban communities,which based on these three approaches,should be designed.
基金Funded by the Natural Science Foundation of Liaoning Province(No.20180550736)Research Foundation of Educational Committee of Liaoning Province(No.JDL2019004)Guangxi Key Laboratory of Information Materials(Guilin University of Electronic Technology)(No.191008-K)。
文摘This article explores the effects of doping ferroelectric materials MgTiO_(3) with different proportions on the properties of polyaniline(PANI).PANI/MgTiO_(3) composites were prepared by in-situ composite method.Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD)were used to characterize the structure of the composites.Scanning electron microscope(SEM)was used to characterize the morphology of the composites.The thermal stability of the composites was investigated by thermogravimetry(TG)and derivative thermogravimetry(DTG).Electrochemical methods(cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS),and constant current charge-discharge test)were used to compare and analyze the electrochemical performance of the composites.TG-DTG analysis and electrochemical experiments all show that the thermal stability and electrochemical properties of the PANI/MgTiO_(3) composite with a mass ratio of 82/18(w/w)are the best.The results indicate that there is a synergistic effect between PANI and MgTiO_(3),which improves the performances of the PANI when the appropriate amount of MgTiO_(3) is added.
基金supported in part by the National Natural Science Founda-tion of China (10635020 and 10975057)the Ministry of Education of China (306022)
文摘Two kinds of noise strategies in binary opinion dynamics on ER random networks are discussed. Random noise p1 in the initial configuration plays a role in redistributing the opinion states associated with the network. Under synchronous updating, the system can attain a stable state within few time steps. The fraction of nodes with changed opinion states F decreases exponentially with time, and the ratio of one of the two opinion states R remains almost unchanged during the evolution. The average ratio <R> crosses at the half-half initial concentration under different p1. For noise in the dynamical evolution p2, the system can reach a steady state with small fluctuations. With larger p2, more nodes have changed opinion states at each updating and more nodes with opposite opinions coexist. If p2 is greater than 0.5, the two opinions coexist with equal support.
