带式输送机张紧车轮轴结构改进

通过对带式输送机张紧车轮轴结构的改进,在保证其使用性能要求的前提下,节省原材料,降低了成本。     

Reducing the risk of choking hazards: Mouthing behaviour of children aged 1 month to 5 years

Young children have a natural tendency to mouth items to explore their environment. Mouthing carries mechanical and chemical hazard potential for injury to the child, for example if they swallow an item they may choke, they may cut themselves on sharp items, and certain chemicals are present in plastic items which may pose a risk to children. Few data are available on the time that young children mouth items, how they mouth, and what they mouth. This study gathered data on 236 children aged between 1 month and 5 years to supplement and extend existing data. Findings are presented of estimated average and maximum daily mouthing times for children, how they mouth, what they mouth, and whether the items mouthed were intended to be. A validation study was carried out to determine the accuracy of the parental observation method used to gather the data. The implications of the findings of this study are discussed with respect to reducing the potential for mechanical accidents in the home.     

Spatial environmental risk factors for pedestrian injury collisions in Ciudad Juárez,Mexico (2008–2009): implications for urban planning

The aim of this study is to examine the spatial distribution of pedestrian injury collisions and analyse the environmental (social and physical) risk factors in Ciudad Juarez, Mexico. More specifically, this study investigates the influence of land use, density, traffic and socio-economic characteristics. This cross sectional study is based on pedestrian injury collision data that were collected by the Municipal Transit Police during 2008–2009. This research presents an analysis of vehicle–pedestrian collisions and their spatial risk determinants using mixed methods that included (1) spatial/geographical information systems (GIS) analysis of pedestrian collision data and (2) ordinary least squares (OLS) regression analysis to explain the density of pedestrian collisions data. In our model, we found a higher probability for pedestrian collisions in census tracts with population and employment density, large concentration of commercial/retail land uses and older people (65 and more). Interventions to alleviate this situation including transportation planning such as decentralisation of municipal transport system, investment in road infrastructure – density of traffic lights, pedestrian crossing, road design, improves lane demarcation. Besides, land use planning interventions should be implemented in commercial/retail areas, in particular separating pedestrian and vehicular spaces.     

车辆路径问题的研究现状和展望

在深入分析国内外有关车辆路径问题研究现状的基础上,指出目前在模型建立、模型求解方法等方面的研究中存在的主要问题,并对今后车辆路径问题的研究方向和发展趋势提出了一些建议。     

公路危险货物运输存在问题及对策

简述了公路危险货物运输的安全现状,指出了危险货物公路运输中存在的问题,并针对这些问题提出了相应的解决对策,这些措施对解决公路危险货物运输存在的问题,对危险货物企业的发展和国家对危险货物运输的管理具有一定的意义。     

十堰商用车零部件产业集群区域竞争力研究

本文对十堰市商用车零部件产业布局、产业结构等方面对其竞争力进行分析,据此提出发展的相关路径,希望对增强十堰市商用车零部件产业核心竞争能力起到一定的借鉴作用.     

航权开放：动因、演进及其效果

文章从理论思潮与航空运输业的产业演变实践两方面分析了航权开放的动因,认为航权开放的理论支持主要在于可竞争理论的发展,而行业需求曲线的变动则是开放的现实要求。最后,在全球航权开放的演进与现状基础上,运用定性的方法分析了航权开放的经济效果。     

国际货物运输代理业经营风险及其控制

国际货物运输代理业是国际商品流通过程的必然产物,也是国际贸易不可缺少的重要组成部分。国际货物运输代理业所面临的风险主要有货物损毁、员工或操作人员的错误或过失、对第三人责任、罚款与关税、费用等。根据风险控制理论与方法,国际货物运输代理业风险控制的方法主要有加强员工在职教育训练、签订完整的合同、明确约定标准交易条件、作出财产状况征信、投保责任险等。     

Market segmentation of airline cargo transport

This study evaluates the market segmentation of airline cargo transport according to service requirements of air freight forwarders. Data obtained using a questionnaire survey reveal that cargo safety is perceived as the most important service attribute, followed by freight rate, cargo tracking, and flight punctuality. Factor analysis is employed to group service attributes into six categories, namely assurance, promptness, empathy, convenience, value added, and customization. According to these service attributes, users of airline cargo transport are then classified into three market segments, namely professional service-oriented, empathy-oriented, and express service-oriented air freight forwarders. Suggestions on marketing strategy formulation for each respective segment are also provided as references to airlines.     

自动化集中装车系统的应用与改进

本文通过对九矿储装运装车环节进行改造,引进了自动化集中装车系统,结合九矿现有站场的实际状况,对调车环节进行了过道岔改造以及车号识别电子监控的补充,完善了自动化装车系统。改造后,九矿储装运能力大为改观。