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OBJECTIVE To explore the impact of maternal hepatitis B surface antigen (HBsAg) carrier status on the occurrence of preterm birth. METHODS We analyzed pregnancy-related complications, outcomes and fetal growth index in 188 HBsAg positive singleton pregnant women during the period of May 2009 to July 2011, with 265 HBsAg-negative women with singleton(More)
BACKGROUND A variety of triage principles have been proposed. The authors sought to evaluate their effects on how many lives can be saved in a hypothetical disaster. OBJECTIVE To determine an optimal scarce resource-rationing principle in the emergency response domain, considering the trade-off between lifesaving efficiency and ethical issues. METHOD A(More)
This paper addresses a scheduling problem on parallel dedicated machines in which the setup times are sequence-dependent and the setup operations are performed by a single server. The objective of the problem is to minimize the makespan of the system. The problem is formulated as an integer program and the lower bounds are constructed. A special case of the(More)
This paper determines the optimal location of K connections in the plane, where a connection links pairs of existing facilities. Both uncapacitated and capacitated versions of the problem are considered. Discretization results for general polyhedral gauges and other properties are established. Two heuristic algorithms are developed for each case using the(More)
Abnormal expression of long non-coding RNA often contributes to unrestricted growth of cancer cells. Long non-coding RNA XIST expression is upregulated in several cancers; however, its modulatory mechanisms have not been reported in hepatocellular carcinoma. In this study, we found that XIST expression was significantly increased in hepatocellular carcinoma(More)
This work addresses the large-scale crude oil scheduling problem of China’s SINOPEC Maoming refinery importing various types of crude oil from two terminals via long-distance pipelines. A hierarchical decomposition approach is employed to construct a two-stage MILP model of the practical refinery operations. In the upper level model, storage and charging(More)