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An abrupt increase in urban road traffic flow caused by incidental congestion is considered. The residual traffic capacity varies in different lanes after an accident, and the influence of accident duration on traffic flow is taken into account. The swallowtail catastrophe model was built based on catastrophe theory. The critical state of traffic congestion under incidental congestion was analyzed using this model, and a traffic flow control scheme is proposed with the goal of maximizing the traffic capacity. Finally, the operational state of traffic flow under different scenarios is analyzed through case study and the feasibility of the model is validated.

Aim: This work sought to evaluate the correlation between the five domains of the Polycystic Ovary Syndrome Questionnaire (PCOSQ) and anxiety and depression scales and the clinical phenotype and fertility outcomes in infertile polycystic ovary syndrome (PCOS) patients and to determine the effect of quality of life (QOL) on the clinical, biochemical and fertility disorders in these patients. Methods: The data in this study came from a large‐scale hospital‐based cohort survey of infertile PCOS patients across mainland China. A total of 1000 infertile PCOS subjects diagnosed according to the modified Rotterdam criteria ranging in age from 20 to 40 years in 21 sub‐centers (27 hospitals) were enrolled. Baseline anthropometric parameters, endocrine indexes, metabolic panel, QOL questionnaires and the fertility outcomes of ovulation, conception, pregnancy, pregnancy loss and live birth were collected. Results: PCOSQ scores were significantly correlated with most of the baseline parameters. PCOSQ‐weight domain scores of National Institute of Health‐PCOS group were significantly lower compared with non‐National Institute of Health‐PCOS group. The five domains scores of PCOSQ were significantly negatively correlated with the body mass index levels of PCOS patients. The serum testosterone levels (total testosterone, free testosterone and free androgen index) were significantly negatively correlated to the scores for the weight, body hair, infertility and emotion domains of PCOSQ. Scores on the anxiety and depression scales were significantly and positively correlated with luteinizing hormone, luteinizing hormone/follicle‐stimulating hormone levels. In the low‐score group of infertility domain, the rates of conception, pregnancy and live birth decreased significantly. Conclusions: QOL appears to have an impact on the physical symptoms of PCOS, and the emotional stress of infertility affects fertility outcomes. [ABSTRACT FROM AUTHOR]