Family lifestyle factors related to children's congenital heart defects in China: a case-control study

Objective To explore the multiple risk factors for family lifestyle of children with congenital heart defects (CHDs) in Shaanxi Province, China. children and their parents. The univariate and multivariable logistic regression models were used to analyze the influence of risk factors related to parents' lifestyle on CHDs. Results Several possible risk factors were found for CHDs, including fever (OR=4.465, P=0.017), pesticides contact (OR=2.234, P=0.083), passive smoking during pregnancy (OR=20.529, P=0.007) and father's smoking (OR=3.342, P=0.005); fever (OR=2.428, P=0.012) and passive smoking during pregnancy (OR=1.201, P=0.037) were also correlated with ventricular sepal defect (VSD). Conclusion Fever, pesticides contact and passive smoking are associated with CHDs during pregnancy. We should focus our attention on health care during pregnancy to avoid the above-mentioned risk factors and call on parents to hold on to a good healthy lifestyle.     

Effects of hormone replacement therapy on endothelial function in menopausal women

Objective To observe the effects of hormone replacement therapy (HRT) on endothelial function in menopausal women. Methods A total of 30 menopausal women were treated with 2.5 mg of Tibolone (Livial) daily. At the same time, 30 women with natural menopause without any treatment served as the control group. Endothelium-dependent (EDD), endothelium-independent (NID) vasodilatation function, and estradiol (E2) were examined by the non-invasive high-resolution ultrasonography before the treatment and at 12th, 24th, 36th and 48th week of treatment, respectively. Results After hormone treatment, E2 increased significantly and EDD was improved significantly (P<0.05), and E2 was positively related with EDD (r=0.8092, P<0.001). No change of EDD was observed in the control group whereas a significant increase was observed in the treatment group. Conclusion Endothelium-dependent vasodilatation dysfunction is prominent in menopausal women. Tibolone can help improve the condition.     

弯及制动条件下的钢筋混凝土桥柔性铺装层力学响应分析

桥面铺装是桥梁行车体系的重要组成部分,它对桥梁耐久性、保证行车安全舒适以及经济效益和社会效益有着极其重要的作用。采用通用有限元分析软件ANSYS程序对某钢筋混凝土桥面柔性铺装层进行力学分析,着重研究了转弯及制动条件下沥青混凝土铺装层的应力、应变和变形分布的变化规律,从而为减少桥面铺装层的早期病害,提高桥面铺装层的服务性能提供理论依据。     

基于物流信息平台的配送车辆导航系统设计

提出了基于物流信息平台的配送车辆导航的思想,弥补了现有车辆导航系统无法适应物流配送车辆特性的不足,较好地解决了物流配送车辆导航的问题;对基于物流信息平台的配送车辆导航系统的功能模块、总体结构进行设计,分析了其数据流程,并对配送车辆导航系统与物流信息平台之间的信息关联进行了分析,阐述了本系统的优势.     

复合材料薄壁杆件非线性扭转分析

考虑几何非线性的影响，建立了在拉、压、弯、扭组合变形下复合材料薄壁杆件理论．重点对杆件进行非线性扭转分析，由给出的等效本构方程和总势能泛函，根据最小势能原理导出了所给问题的平衡控制方程和相应边界条件．讨论了该方程和边界条件的求解．     

杭甬铁路客运专线施工图审核管理综述及建议

杭甬铁路客运专线为铁路深化施工图审核试点项目之一,在项目施工图审核实施过程中,认真执行铁道部的有关规定,对深化施工图审核的组织机构、主要内容、审核深度、工作流程、过程控制等进行深入研究、试行并进行总结。并在对杭甬铁路客运专线施工图审核工作总结和评述的基础上,对铁路建设项目施工图审核管理有关问题进行探讨,提出建设单位设立设计管理部门、设计院成立专门审核咨询机构、审核单位介入时机、审核和现场核对主要内容及方式、审核过程控制等方面建议。     

胶粉改性沥青混合料的路用性能研究

主要通过在沥青混合料拌合过程中掺入不同量的橡胶粉进行马歇尔、车辙、残留稳定度、劈裂强度等试验,确定掺入不同量的橡胶粉沥青混合料的高温稳定性、水稳定性和低温性能等路用性能的变化,试验数据表明沥青混合料的各项路用性能指标都得到明显地改善和提高。     

浅谈钢筋混凝土裂缝成因与控制

在近年的住宅建设中,钢筋混凝土现浇大量应用,"住宅楼现浇楼板裂缝问题"也成为居民住宅质量投诉的热点。该文从施工、设计和材料原因等方面分析了楼面裂缝的综合性防治措施。     

我国第三方汽车物流企业信息化研究

文章分析了信息化对第三方汽车物流企业的重要性,指出了第三方汽车物流企业信息化发展现状及存在的问题,最后提出了相应的信息化发展的对策建议。     

枢纽实际调度运行下赣江石虎塘枢纽—峡江枢纽间河段水文特征参数研究

在赣江石虎塘枢纽—峡江枢纽两坝间的长河段，因峡江枢纽库区防护问题，近年来枢纽坝上实际运行水位远低于设计运行水位，导致两坝间河段水位整体降低，进而引发诸多问题，如两坝间大多涉水工程因设计阶段设计水位选取偏差导致运营期无法正常使用等。采用长河段一维数值模拟方法，根据峡江枢纽实际调度运行方案，对洪中枯期多级特征流量及峡江枢纽对应坝前实际运行水位组合下河道水面线进行计算；对两坝间河段沿程水位、河道比降进行计算分析，并选取各组回水曲线上、下包络线作为研究河段现阶段沿程设计参考水位。研究成果可为研究河段涉水工程设计提供水文特征参考资料。