Residents living in the cold areas such as Harbin generally experience a residence time of approximately 6 months in chilly winter without frequent natural ventilation. To find out the influence of a short period of v...Residents living in the cold areas such as Harbin generally experience a residence time of approximately 6 months in chilly winter without frequent natural ventilation. To find out the influence of a short period of ventilation on the indoor formaldehyde concentration inside a new building, an investigation was conducted for the instance of twice ventilation in a day through window opening. The results showed that the initial concentration of formaldehyde was 3.53 -8. 48 times as high as the concentration after 10 min ventilation. After closing the window, the indoor formaldehyde concentration increased with time and followed an exponential equation of C = C0 exp（ - b ＊ t） ＋ （ a ＋ Cu, ） [ 1 - exp（ - b ＊ t） ] with correlation coefficient （ R^2 ） of 0. 945 - 0. 999, based on the statistical analysis of 14 groups of measurement data. The developed equation can be used to estimate the emission rate of indoor formaldehyde sources and the air exchange rate of the test room simultaneously.展开更多
People’s health is the basis for the progress of social civilization and an important symbol of national prosperity and national strength.Using the entropy method,spatial autocorrelation,spatio-temporal geographic we...People’s health is the basis for the progress of social civilization and an important symbol of national prosperity and national strength.Using the entropy method,spatial autocorrelation,spatio-temporal geographic weighted regression and other methods,we conducted a comprehensive evaluation of the high-quality development level of public health in Guizhou Province from 2011 to 2020 and an evolutionary analysis of the spatio-temporal divergence.The results revealed four key aspects of the state of public health in Guizhou Province.(1)The overall level of public health is constantly improving,but structural imbalance is prominent.(2)From the spatial dimension,the spatial differences in the level of public health have gradually moved from significant to a state of equilibrium.The northeastern cities were more strongly driven by the radiation of the peripheral cities,while this effect was weaker in the southwestern cities.From the time dimension,the spatial pattern shows a clear gradient,with a faster vertical growth rate.(3)The overall spatial correlation of the level of public health is weak,with more cold spots than hot spots,showing a distribution pattern of“strong in the northeast and weak in the southwest”.(4)The new rural cooperative medical care participation rate,(rural)per capita health expenditure,and the electronic health record creation rate have become the most important drivers affecting the high-quality development of public health in Guizhou Province.展开更多
Urban public health is an important global issue, and receives extensive attention. It is necessary to compare urban public health status among different cities, so that each city can define its own health patterns an...Urban public health is an important global issue, and receives extensive attention. It is necessary to compare urban public health status among different cities, so that each city can define its own health patterns and limiting factors. The following assessment indicators were established to evaluate urban public health status： living conditions, physical health, education and culture, envir- onmental quality, and social security. A weighted-sum model was used in combination with these indicators to compare the urban public health status in four cities-- Beijing, New York, London, and Tokyo--using data for 2000-2009. Although the urban public health level of Beijing was lower than that of the other cities, it showed the greatest increase in this level over the study period. Different patterns of urban public health were identified： London had the most balanced, steady pattern （almost all factors performed well and developed stably）; New York and Tokyo showed balanced, but unsteady patterns （most factors remained high, though social security and environ- mental quality fluctuated）; Beijing had the most unba- lanced, unsteady pattern （the different factors were at different levels, and education and culture and social security fluctuated）. For enhanced urban public health status, environmental quality and education and culture clearly need to be improved in Beijing. This study demonstrates that a comparison of different cities is helpful in identifying limiting factors for urban public health and providing an orientation for future urban development.展开更多
基金Sponsored by the Scientific and Technically Key Project of Heilongjiang Province(Grant No.GC04C213).
文摘Residents living in the cold areas such as Harbin generally experience a residence time of approximately 6 months in chilly winter without frequent natural ventilation. To find out the influence of a short period of ventilation on the indoor formaldehyde concentration inside a new building, an investigation was conducted for the instance of twice ventilation in a day through window opening. The results showed that the initial concentration of formaldehyde was 3.53 -8. 48 times as high as the concentration after 10 min ventilation. After closing the window, the indoor formaldehyde concentration increased with time and followed an exponential equation of C = C0 exp（ - b ＊ t） ＋ （ a ＋ Cu, ） [ 1 - exp（ - b ＊ t） ] with correlation coefficient （ R^2 ） of 0. 945 - 0. 999, based on the statistical analysis of 14 groups of measurement data. The developed equation can be used to estimate the emission rate of indoor formaldehyde sources and the air exchange rate of the test room simultaneously.
基金The Guizhou Science and Technology Foundation(ZK[2021]General 186)The National Natural Science Foundation of China(42271228,42101209)+1 种基金The Guizhou Provincial Department of Education Natural Science Research Fund(Guizhou Jiaohe KY Zi[2022]No.156)TheGuizhou Normal University Doctoral Research Project(GZNUD[2019]No.5).
文摘People’s health is the basis for the progress of social civilization and an important symbol of national prosperity and national strength.Using the entropy method,spatial autocorrelation,spatio-temporal geographic weighted regression and other methods,we conducted a comprehensive evaluation of the high-quality development level of public health in Guizhou Province from 2011 to 2020 and an evolutionary analysis of the spatio-temporal divergence.The results revealed four key aspects of the state of public health in Guizhou Province.(1)The overall level of public health is constantly improving,but structural imbalance is prominent.(2)From the spatial dimension,the spatial differences in the level of public health have gradually moved from significant to a state of equilibrium.The northeastern cities were more strongly driven by the radiation of the peripheral cities,while this effect was weaker in the southwestern cities.From the time dimension,the spatial pattern shows a clear gradient,with a faster vertical growth rate.(3)The overall spatial correlation of the level of public health is weak,with more cold spots than hot spots,showing a distribution pattern of“strong in the northeast and weak in the southwest”.(4)The new rural cooperative medical care participation rate,(rural)per capita health expenditure,and the electronic health record creation rate have become the most important drivers affecting the high-quality development of public health in Guizhou Province.
基金Financial support is provided by the National Natural Science Foundation of China （Grant No. 40901269）, the Program for New Century Excellent Talents in University （NCET-09-0226）, the National Science Foundation for Innovative Research Group （No. 51121003）, and the Fundamental Research Funds for the Central Universities. The authors would also thank the help of the editor and the comments of the reviewers, which significantly improved the quality of this paper.
文摘Urban public health is an important global issue, and receives extensive attention. It is necessary to compare urban public health status among different cities, so that each city can define its own health patterns and limiting factors. The following assessment indicators were established to evaluate urban public health status： living conditions, physical health, education and culture, envir- onmental quality, and social security. A weighted-sum model was used in combination with these indicators to compare the urban public health status in four cities-- Beijing, New York, London, and Tokyo--using data for 2000-2009. Although the urban public health level of Beijing was lower than that of the other cities, it showed the greatest increase in this level over the study period. Different patterns of urban public health were identified： London had the most balanced, steady pattern （almost all factors performed well and developed stably）; New York and Tokyo showed balanced, but unsteady patterns （most factors remained high, though social security and environ- mental quality fluctuated）; Beijing had the most unba- lanced, unsteady pattern （the different factors were at different levels, and education and culture and social security fluctuated）. For enhanced urban public health status, environmental quality and education and culture clearly need to be improved in Beijing. This study demonstrates that a comparison of different cities is helpful in identifying limiting factors for urban public health and providing an orientation for future urban development.
