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This paper reports the investigation of the relationship between CO 2 concentration and passenger quantity in the waiting room of a railway station. In situ survey was conducted to collect data on purchased passenger tickets, train schedule and arrival times at Changsha railway station and to establish modelling results. The predictive model is based on the established passenger flow pattern and dynamic governing equations of CO 2 concentration as a reference indicator of indoor air quality (IAQ) in the waiting room at the railway station. This work indicates that the CO 2 source is associated with train passengers, and the air change rates of natural and mechanical ventilation are predominant factors that govern the indoor CO 2 concentration in the waiting room. In addition, the air change rate of natural ventilation ranging from 0.3 h À1 to 0.8 h À1 would not meet the IAQ requirement in most conditions, whereas the air change rate of mechanical ventilation of n ¼ 2 h À1 can meet the IAQ requirement in various situations.

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Purpose To explore the value of anti-Mullerian hormone (AMH) in polycystic ovary syndrome (PCOS) patients for different phenotype and age, and identify the relationship between the hyperandrogenism (HA) and polycystic ovary morphology (PCOM) in Chinese cohort.Methods A total of 2262 women (1631 with PCOS and 631 health controls) were enrolled. The serum AMH and total testosterone (TT) were analyzed, compared the AMH level of each subgroup and evaluated the value of each phenotype and age group of PCOS.Results The level of AMH in PCOS(8.63±4.73ng/ml) was higher than that in health controls(5.57±3.31ng/ml) (P＜0.01).The level of AMH in PCOM subgroup(11.19±6.4ng/ml) was significantly higher than that in HA subgroup(8.58±4.74ng/ml) (P＜0.01), and both higher than that in health controls(P＜0.01). AMH changes highly in PCOS compared with the health control, but as the same value in subgroups of PCOS patients under 30-year-old.Conclusion AMH changed in different subgroups of PCOS, which was the possible reason why AMH was not a diagnostic indicator. However, AMH could differ the subgroup in clinical, AMH was strongly related with PCOM, not hyperandrogenism. AMH changed much as aged, but stable in PCOS patients under 30-year-old.

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