承唐高速公路箱梁冬季施工方案

介绍承唐高速公路箱梁施工项目的技术要点和施工方案,可为同类工程及业内同仁提供借鉴。     

现浇连续箱梁施工技术应用探讨

结合高速公路现浇连续箱梁工程的施工实践,重点对现浇箱梁施工流程和关键施工技术进行了分析,并针对满堂架搭设,模板安装,钢筋、钢绞线安装,混凝土浇筑、振捣,预应力张拉及孔道注浆等方面进行了探讨。     

广东省公路养护管理体制改革研究

分析了广东省目前的公路养护管理体制的现状,研究了现行公路养护管理体制下国省道、经营性收费公路管理中存在的主要问题以及公路养护管理体制与运营机制改革的关系,提出了广东省公路养护管理体制改革的几点政策建议.     

推进科技创新 提升航海保障能力

文中介绍了天津海事局近年来航标科技创新的主要成就和工作经验，探讨了航标科研可持续发展所需的机制建设、环境营造、人才培养及资金投入等工作的开展方向，对科技创新推动航标事业发展及创新管理理念的重要意义进行了阐述。     

海排灰的氯盐含量对三灰结合料微观机理影响研究

对基于海排灰的三灰结合料水化产物的微观机理进行研究,揭示氯离子对底基层材料强度形成的影响.研究表明:水泥、石灰材料对海排灰中的氯离子有固化作用,海排灰中适量的氯离子对底基层材料有益.     

Co-simulation and experimental study for wingspan of flapping wing micro aerial vehicle

The 3D model of flapping wing mechanism and veins is constructed in 3D computer aided design (CAD) software UG. Then the co-simulation model is established by using multibody dynamics software ADAMS and MATLAB. The validation of this co-simulation model is verified by comparing the simulation results with final experiments. The simulation results and experiments reveal that the relation between flapping frequency and driving voltage of motor is approximately linear under various wingspans. The variance of flapping frequency among different wingspans augments gradually with increasing voltage. Furthermore, the simulation results sug-gest that flapping frequency is sensitive to wingspan and decreases with increasing wingspan of veins, and the relation between flapping frequency and moment of inertia of veins is also approximately linear for various volt-ages.     

浅谈人工湿地的应用发展

该文介绍了人工湿地的定义、分类、构造、特点、污染物的去除机理,及其在国内外的应用发展情况。     

240／275系列机车柴油机传动机构中间齿轮装配破损故障的技术对策

根据沈阳铁路局近年240／275系列机车柴油机传动机构中间齿轮装配破损的数据统计，分析了故障发生的原因，提出了解决问题的技术措施。     

高校就业指导师的角色、定位及素质要求

高校就业指导师是各高校已经有的师资队伍,但对其工作定位及发展前途都未有较为清晰的要求,导致这支队伍的不稳定,与目前高校发展极不匹配。通过研究,初步规范高校就业指导师的角色、定位和素质要求,使高校就业指导师按照科学规范的要求发展,促进高校整体事业的前进。     

Overview of public transport policy developments in South Africa

In South Africa, a restructuring of the public transport system is currently under way. In the bus industry the tender for contract system is being implemented, the commuter rail sector is being recapitalised and the minibus taxi industry recapitalization programme is in its early stages. Progress with policy implementation across the modes of transport, modal split trends and issues that hamper the full development of the public transport industry are discussed in this paper. Medium to long term policy and strategy initiatives that will further inform the development of the industry are also highlighted in this chapter.