The history of the philosophy oscillates between a useful knowledge and the speculation useless. This paper attempts to show a few consequences of this two perspectives named the technical interpretation of the knowle...The history of the philosophy oscillates between a useful knowledge and the speculation useless. This paper attempts to show a few consequences of this two perspectives named the technical interpretation of the knowledge and the essential interpretation of the knowledge. The proposal of this paper is to show that the philosophy is between the two frontiers delimiters： the border delimiters of the field and the city and the border between the useful and the useless, and indicate the relative importance of useful and useless for these perspectives.展开更多
Daily and annual average atmospheric environmental capacity coefficient(A-value) sequences for China's Mainland are calculated from hourly data recorded at 378 ground stations over 1975–2014. A-values at differen...Daily and annual average atmospheric environmental capacity coefficient(A-value) sequences for China's Mainland are calculated from hourly data recorded at 378 ground stations over 1975–2014. A-values at different recurrence intervals are calculated by fitting the sequences to Pearson type III distribution curves. Based on these A-values and source-sink balance(reference concentration 100 μg m^(-3)), atmospheric environmental capacities at the recurrence intervals are calculated for all of China's Mainland and each provincial administrative region. The climate average atmospheric environmental capacity reference value for the entire mainland is 2.169×10~7 t yr^(-1). An urban atmospheric load index is defined for analyses of the impact of population density on the urban atmospheric environment. Analyses suggest that this index is also useful for differentiating whether air quality changes are attributable to varying meteorological conditions or variations of artificial emission rate.Equations guiding the control of unorganized emission sources are derived for preventing air quality deterioration during urban expansion and population concentration.展开更多
文摘The history of the philosophy oscillates between a useful knowledge and the speculation useless. This paper attempts to show a few consequences of this two perspectives named the technical interpretation of the knowledge and the essential interpretation of the knowledge. The proposal of this paper is to show that the philosophy is between the two frontiers delimiters： the border delimiters of the field and the city and the border between the useful and the useless, and indicate the relative importance of useful and useless for these perspectives.
基金supported by the National Natural Science Foundation of China (Grant No. 41405136)
文摘Daily and annual average atmospheric environmental capacity coefficient(A-value) sequences for China's Mainland are calculated from hourly data recorded at 378 ground stations over 1975–2014. A-values at different recurrence intervals are calculated by fitting the sequences to Pearson type III distribution curves. Based on these A-values and source-sink balance(reference concentration 100 μg m^(-3)), atmospheric environmental capacities at the recurrence intervals are calculated for all of China's Mainland and each provincial administrative region. The climate average atmospheric environmental capacity reference value for the entire mainland is 2.169×10~7 t yr^(-1). An urban atmospheric load index is defined for analyses of the impact of population density on the urban atmospheric environment. Analyses suggest that this index is also useful for differentiating whether air quality changes are attributable to varying meteorological conditions or variations of artificial emission rate.Equations guiding the control of unorganized emission sources are derived for preventing air quality deterioration during urban expansion and population concentration.
