The Pan-1 coal mine located in Huainan municipality, Anhui province, is abundant in coal resources. In order to discover the natural conditions of gas in its coal seams, we inverted the burial history of these coal se...The Pan-1 coal mine located in Huainan municipality, Anhui province, is abundant in coal resources. In order to discover the natural conditions of gas in its coal seams, we inverted the burial history of these coal seams using the software of Easy%Ro method and simulated the development process of gas volumes and pressure of the major coal seams using CBM History Simulation Software. Our analysis shows that the devolution of gas volumes and levels of pressure can be divided into four stages: i.e., a biogas stage (P1-P3), a pyrolysis gas stage (T1-T2), an active gas enrichment stage (T3-K1) and a gas dissipating stage (K2-present). Currently, the average amounts of gas and gas pressure in coal seams Nos. 13-1, 11-2 and 8 of the Pan-1 coal mine are 8.18 m3/t and 2.20 MPa; 3.89 m3/t and 2.47 MPa and 6.35 m3/t and 2.89 MPa, respectively. This agrees very well with current mining data.展开更多
This paper aims to analyze the characteristics of body composition changes of Uygur collegestudents and explore the correlation between their body composition and lifestyle.A cross-sectional investigationwas conducted...This paper aims to analyze the characteristics of body composition changes of Uygur collegestudents and explore the correlation between their body composition and lifestyle.A cross-sectional investigationwas conducted on 526 Uygur students(264 males and 262 females)by using the stratified cluster samplingmethod.Questionnaires were used to study their lifestyles,and bioimpedance analyzers were used to measure thebody composition-related indicators.It was found that there were gender differences in various body compositionindicators of Uyghur college students at different ages,and the average value reached a peak in the 21-year-oldgroup.The average BMI,the average BFP and the average WHR were within normal ranges.Compared withother college student groups recently reported,the obesity rate was relatively lower.The proportion of Uyghurgirls with abnormal BFP was higher than that of boys,and the proportion of boys with abnormal WHR and VAIindexes was higher than that of girls.Exercise status was negatively correlated with fat mass,BFP and WHR,and positively correlated with other indicators.Therefore,Uygur college students'body composition indicatorsvary with gender and age.Exercise has a significant effect on many body composition indicators of Uygur collegestudents,and can effectively improve the proportion of body composition.展开更多
基金Project 2005CB221501 supported by the National Basic Research Program of China
文摘The Pan-1 coal mine located in Huainan municipality, Anhui province, is abundant in coal resources. In order to discover the natural conditions of gas in its coal seams, we inverted the burial history of these coal seams using the software of Easy%Ro method and simulated the development process of gas volumes and pressure of the major coal seams using CBM History Simulation Software. Our analysis shows that the devolution of gas volumes and levels of pressure can be divided into four stages: i.e., a biogas stage (P1-P3), a pyrolysis gas stage (T1-T2), an active gas enrichment stage (T3-K1) and a gas dissipating stage (K2-present). Currently, the average amounts of gas and gas pressure in coal seams Nos. 13-1, 11-2 and 8 of the Pan-1 coal mine are 8.18 m3/t and 2.20 MPa; 3.89 m3/t and 2.47 MPa and 6.35 m3/t and 2.89 MPa, respectively. This agrees very well with current mining data.
文摘This paper aims to analyze the characteristics of body composition changes of Uygur collegestudents and explore the correlation between their body composition and lifestyle.A cross-sectional investigationwas conducted on 526 Uygur students(264 males and 262 females)by using the stratified cluster samplingmethod.Questionnaires were used to study their lifestyles,and bioimpedance analyzers were used to measure thebody composition-related indicators.It was found that there were gender differences in various body compositionindicators of Uyghur college students at different ages,and the average value reached a peak in the 21-year-oldgroup.The average BMI,the average BFP and the average WHR were within normal ranges.Compared withother college student groups recently reported,the obesity rate was relatively lower.The proportion of Uyghurgirls with abnormal BFP was higher than that of boys,and the proportion of boys with abnormal WHR and VAIindexes was higher than that of girls.Exercise status was negatively correlated with fat mass,BFP and WHR,and positively correlated with other indicators.Therefore,Uygur college students'body composition indicatorsvary with gender and age.Exercise has a significant effect on many body composition indicators of Uygur collegestudents,and can effectively improve the proportion of body composition.
