The indoor air quality is directly affected by particulate matters(PM).In this study the concentration of indoor and outdoor particles of an apartment and an office were measured.The effect of the concentration of out...The indoor air quality is directly affected by particulate matters(PM).In this study the concentration of indoor and outdoor particles of an apartment and an office were measured.The effect of the concentration of outdoor particles on the concentration of indoor particles was analyzed.The results demonstrate that concentration of indoor and outdoor particles has 2-3 peak points during one day.The indoor to outdoor ratio increases as the size of particles decreases,which indicates that the fine particles penetrate through the building envelopes more easily.The concentration of indoor particles is closely correlated with the concentration of outdoor particles,and the correlation increases as the size of particles decreases.展开更多
Temperature change plays a crucial role in global change sciences. In the past several decades, comprehensive find- ings have been achieved on temperature change in China for the past 100 years. Several time series ha...Temperature change plays a crucial role in global change sciences. In the past several decades, comprehensive find- ings have been achieved on temperature change in China for the past 100 years. Several time series have been created to illustrate the averaged surface air temperature for the country. The correlations of these series range from 0.73 to 0.97. It is also achieved in better data quality, wider spatial data coverage, improved homogeneity of time series, and enhanced reliability of findings. The results show an annual mean temperature increase by 0.78±0.27℃ per 100 years in China for the period 1906-2005. After prolonging the period till 2007, it is found that 2007 is rated as the warmest year in the past 100 years. Although all the series, except one, reflect temperature changes in the eastern part of China before the 1930s, they represent the general temperature change in most parts of the country after the 1930s.展开更多
With 1 185 pi eces of questionnaire, it is found that in China, people take fresh air, odor, e tc., as well as indoor air temperature, humidity, as the most important indoor a ir parameters. It is also found that ther...With 1 185 pi eces of questionnaire, it is found that in China, people take fresh air, odor, e tc., as well as indoor air temperature, humidity, as the most important indoor a ir parameters. It is also found that there is a significant sensitivity differen ce in indoor environment between southerners and northerners in China. People fr om different regions have different demands for their working and living environ ment. Therefore, as a good design of air conditioning system, it is strongly rec ommended that the different demands of people from different regions should be t aken into consideration.展开更多
基金The Specialized Research Fund for the Doctoral Program of Higher Education of China(No.20050248017)
文摘The indoor air quality is directly affected by particulate matters(PM).In this study the concentration of indoor and outdoor particles of an apartment and an office were measured.The effect of the concentration of outdoor particles on the concentration of indoor particles was analyzed.The results demonstrate that concentration of indoor and outdoor particles has 2-3 peak points during one day.The indoor to outdoor ratio increases as the size of particles decreases,which indicates that the fine particles penetrate through the building envelopes more easily.The concentration of indoor particles is closely correlated with the concentration of outdoor particles,and the correlation increases as the size of particles decreases.
基金supported by the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period of China(2007BAC03A01)the Climatic Change Project of China Meteorological Administration(CCCSF2008-10)
文摘Temperature change plays a crucial role in global change sciences. In the past several decades, comprehensive find- ings have been achieved on temperature change in China for the past 100 years. Several time series have been created to illustrate the averaged surface air temperature for the country. The correlations of these series range from 0.73 to 0.97. It is also achieved in better data quality, wider spatial data coverage, improved homogeneity of time series, and enhanced reliability of findings. The results show an annual mean temperature increase by 0.78±0.27℃ per 100 years in China for the period 1906-2005. After prolonging the period till 2007, it is found that 2007 is rated as the warmest year in the past 100 years. Although all the series, except one, reflect temperature changes in the eastern part of China before the 1930s, they represent the general temperature change in most parts of the country after the 1930s.
文摘With 1 185 pi eces of questionnaire, it is found that in China, people take fresh air, odor, e tc., as well as indoor air temperature, humidity, as the most important indoor a ir parameters. It is also found that there is a significant sensitivity differen ce in indoor environment between southerners and northerners in China. People fr om different regions have different demands for their working and living environ ment. Therefore, as a good design of air conditioning system, it is strongly rec ommended that the different demands of people from different regions should be t aken into consideration.
