Spare parts are critical to scheduled maintenance and fault repair,and can directly affect the readiness and combat capability of equipment.Equipment′s capacity of carrying spares is influenced by its storage space a...Spare parts are critical to scheduled maintenance and fault repair,and can directly affect the readiness and combat capability of equipment.Equipment′s capacity of carrying spares is influenced by its storage space and scales,so it is necessary to consider economic factors,e.g.spares cost,as well as non-economic ones,such as spares volume,mass and scale,when optimizing spares configuration.Aiming at this problem,the optimization model based on multi-constraints for carrying spares is built by METRIC theory and system analysis.Through the introduction of Lagrange factors,the spares cost is transformed to shadow price,and the optimization method for carrying spares and the dynamic adjustment policy of Lagrange factors are proposed.The result of a given example is analyzed,and demonstrates that the proposed model can be optimized with all constraints,and the research can provide a new way for carrying spares optimization.展开更多
目的了解成人乙型肝炎(乙肝)知识知晓率和无或不详乙肝疫苗(Hepatitis B vaccine,HepB)接种史成人的接种意愿。方法采用便利抽样法在黑龙江和甘肃省选择4个调查现场,抽取18-59岁常住人口进行问卷调查,分析乙肝知识知晓率、无或不详HepB...目的了解成人乙型肝炎(乙肝)知识知晓率和无或不详乙肝疫苗(Hepatitis B vaccine,HepB)接种史成人的接种意愿。方法采用便利抽样法在黑龙江和甘肃省选择4个调查现场,抽取18-59岁常住人口进行问卷调查,分析乙肝知识知晓率、无或不详HepB接种史者的HepB接种意愿率。结果共纳入调查对象1051名,乙肝知识平均得分为10.09±3.36分(满分16分),其中54.23%的调查对象知识得分>10分。调查对象对使用公用马桶、与乙肝病毒(Hepatitis B virus,HBV)感染者一起玩或工作、与HBV感染者一起进餐、蚊虫叮咬是否可感染HBV的知晓率分别为45.86%、45.10%、31.30%、24.26%。无或不详HepB接种史者的HepB接种意愿率为67.80%(318/469)。Logistic回归分析显示,女性HepB接种意愿率高于男性(OR=1.74,95%CI:1.16-2.62);有医疗保险者高于无医疗保险者(OR=2.19,95%CI:1.19-4.01);乙肝知识得分>10分者高于≤10分者(OR=2.42,95%CI:1.54-3.78)。结论调查地区成人对HBV错误传播途径的知晓度低;提高乙肝知识知晓水平可增加无或不详HepB接种史成人的HepB接种意愿。展开更多
基金supported in part by the General Armament Department Pre-research Foundation in 12th FiveYear(No.51304010206)the National Defense Pre-research Project in 13th Five-Year (No.41404050502)
文摘Spare parts are critical to scheduled maintenance and fault repair,and can directly affect the readiness and combat capability of equipment.Equipment′s capacity of carrying spares is influenced by its storage space and scales,so it is necessary to consider economic factors,e.g.spares cost,as well as non-economic ones,such as spares volume,mass and scale,when optimizing spares configuration.Aiming at this problem,the optimization model based on multi-constraints for carrying spares is built by METRIC theory and system analysis.Through the introduction of Lagrange factors,the spares cost is transformed to shadow price,and the optimization method for carrying spares and the dynamic adjustment policy of Lagrange factors are proposed.The result of a given example is analyzed,and demonstrates that the proposed model can be optimized with all constraints,and the research can provide a new way for carrying spares optimization.
文摘目的了解成人乙型肝炎(乙肝)知识知晓率和无或不详乙肝疫苗(Hepatitis B vaccine,HepB)接种史成人的接种意愿。方法采用便利抽样法在黑龙江和甘肃省选择4个调查现场,抽取18-59岁常住人口进行问卷调查,分析乙肝知识知晓率、无或不详HepB接种史者的HepB接种意愿率。结果共纳入调查对象1051名,乙肝知识平均得分为10.09±3.36分(满分16分),其中54.23%的调查对象知识得分>10分。调查对象对使用公用马桶、与乙肝病毒(Hepatitis B virus,HBV)感染者一起玩或工作、与HBV感染者一起进餐、蚊虫叮咬是否可感染HBV的知晓率分别为45.86%、45.10%、31.30%、24.26%。无或不详HepB接种史者的HepB接种意愿率为67.80%(318/469)。Logistic回归分析显示,女性HepB接种意愿率高于男性(OR=1.74,95%CI:1.16-2.62);有医疗保险者高于无医疗保险者(OR=2.19,95%CI:1.19-4.01);乙肝知识得分>10分者高于≤10分者(OR=2.42,95%CI:1.54-3.78)。结论调查地区成人对HBV错误传播途径的知晓度低;提高乙肝知识知晓水平可增加无或不详HepB接种史成人的HepB接种意愿。
