Introduction:To construct a set of evaluation indicators suitable for the public health system in primary and secondary schools in Beijing,this study aimed to provide a basis for objectively assessing the current stat...Introduction:To construct a set of evaluation indicators suitable for the public health system in primary and secondary schools in Beijing,this study aimed to provide a basis for objectively assessing the current status of system development and identifying future directions for improvement.Methods:An indicator pool was established based on literature reviews and expert consultation.The indicator system was then refined and finalized through two rounds of the Delphi method,and the weights of the indicators were determined using the analytic hierarchy process.Results:The expert participation rate reached 100%,and the average expert authority coefficient was 0.87.The indicator coordination coefficient W was statistically significant(P<0.001).Ultimately,an evaluation system comprising 5 first-level indicators,15 second-level indicators,and 39 third-level indicators was developed.Conclusion:The indicator system constructed in this study shows good expert consistency and credibility.It can effectively pinpoint key components of system development,providing a scientific foundation for optimizing resource allocation and supporting ongoing improvement.展开更多
The dynamical effects of a cylindrically symmetric moving shock wave in a self-gravitating and rotating ideal gas medium influenced by a magnetic field and radiation heat flux are investigated.The dynamics of the shoc...The dynamical effects of a cylindrically symmetric moving shock wave in a self-gravitating and rotating ideal gas medium influenced by a magnetic field and radiation heat flux are investigated.The dynamics of the shock wave are governed by the one-dimensional motion of the gas,and the energy equation contains the effect of thermal radiation in the setting of an optically thick limit.A mathematical model is established using the Lie symmetry method,and all possible cases of similarity solutions are obtained by choosing different subalgebras from the optimal system.The numerical computations are performed using a fourth-order Runge-Kutta method.For a power law shock path,the contour plots of flow variables such as density and velocity are presented for convenient visualization.The variations of the shock strength and the flow variables in the physical flow field region behind the shock front with changes in the values of the gravitational parameter,rotational parameter,adiabatic index,ambient magnetic field strength,similarity exponent,and radiative heat transfer parameter are investigated.It is found that increases in the ambient magnetic field strength and the radiative heat transfer parameter lead to decay of the shock wave.For a power law shock path,it is found that increases in the gravitational parameter and adiabatic index cause decay of the shock wave,whereas for an exponential law shock path,the shock strength is increased by increases in the values of these parameters.展开更多
基金Supported by an open research project of the Capital Institute of Health Management and Policy(2023JD05).
文摘Introduction:To construct a set of evaluation indicators suitable for the public health system in primary and secondary schools in Beijing,this study aimed to provide a basis for objectively assessing the current status of system development and identifying future directions for improvement.Methods:An indicator pool was established based on literature reviews and expert consultation.The indicator system was then refined and finalized through two rounds of the Delphi method,and the weights of the indicators were determined using the analytic hierarchy process.Results:The expert participation rate reached 100%,and the average expert authority coefficient was 0.87.The indicator coordination coefficient W was statistically significant(P<0.001).Ultimately,an evaluation system comprising 5 first-level indicators,15 second-level indicators,and 39 third-level indicators was developed.Conclusion:The indicator system constructed in this study shows good expert consistency and credibility.It can effectively pinpoint key components of system development,providing a scientific foundation for optimizing resource allocation and supporting ongoing improvement.
文摘The dynamical effects of a cylindrically symmetric moving shock wave in a self-gravitating and rotating ideal gas medium influenced by a magnetic field and radiation heat flux are investigated.The dynamics of the shock wave are governed by the one-dimensional motion of the gas,and the energy equation contains the effect of thermal radiation in the setting of an optically thick limit.A mathematical model is established using the Lie symmetry method,and all possible cases of similarity solutions are obtained by choosing different subalgebras from the optimal system.The numerical computations are performed using a fourth-order Runge-Kutta method.For a power law shock path,the contour plots of flow variables such as density and velocity are presented for convenient visualization.The variations of the shock strength and the flow variables in the physical flow field region behind the shock front with changes in the values of the gravitational parameter,rotational parameter,adiabatic index,ambient magnetic field strength,similarity exponent,and radiative heat transfer parameter are investigated.It is found that increases in the ambient magnetic field strength and the radiative heat transfer parameter lead to decay of the shock wave.For a power law shock path,it is found that increases in the gravitational parameter and adiabatic index cause decay of the shock wave,whereas for an exponential law shock path,the shock strength is increased by increases in the values of these parameters.
