中型汽车变速软轴操纵系统设计

通过目前中型常规车刚性硬杆操纵和远距离软轴操纵方式的对比,阐述了刚性硬杆操纵和远距离软轴操纵方式的优缺点;介绍了中型汽车变速软轴操纵系统的设计方法,并通过数据验算和实际验证,证明了设计方法的正确性;使用结果也表明,该设计满足整车操纵轻便性的要求,达到设计出高品质中卡、适用市场需求的目的。     

Unified approach for vibration analyses of annular sector and annular plates with general boundary conditions

This paper presents a unified approach for predicting the free and forced (steady-state and transient) vibration analyses of annular sector and annular plates with various combinations of classical and non-classical boundary supports. In spite of the types of the boundary restraints and the shapes of the plates, the admissible displacement function is described as a modified trigonometric series expansion, and four sine terms are introduced to overcome all the relevant discontinuities or jumps of elastic boundary conditions. Mathematically, the unification of various boundary value problems for annular sector and annular plates is physically realized by setting a set of coupling springs to ensure appropriate continuity conditions along the radial edges of concern. Numerous examples are presented for the free vibration analyses of annular sector and annular plates with different boundary restraints. With regard to the forced vibration analysis, annular sector and annular plates with different external excitations are examined. The accuracy, convergence and numerical robustness of the current approach are extensively demonstrated and verified through numerical examples which involve plates with various shapes and boundary conditions.     

铁路货运服务质量评价指标体系构建探讨

为提升铁路货运服务质量整体水平,在分析我国铁路货运服务质量评价指标体系发展现状及存在问题的基础上,明确确立铁路企业的市场主体地位、注重产品整体效益、体现经营效益最大化、提高营销业务评价力度的铁路货运评价指标体系构建目的,依据目的性原则、全面性原则、系统性原则、可操作性原则,从外部市场、生产组织、经营效果等多个方面,运用菜单式框架结构搭建铁路货运服务质量评价指标体系,以提升铁路货运的市场竞争力。     

THE CHANGES OF PERIPHERAL BLOOD T LYMPHOCYTE SUBSETS IN PATIENTS WITH PRIMARY HEPATIC CARCINOMA BOTH PRE-TACE AND POST-TACE

Ｔｈｅｂｏｄｙ’ｓａｎｔｉ ｔｕｍｏｒｉｍｍｕｎｏｒｅａｃｔｉｏｎｉｓｍａ ｉｎｌｙｔｈｅｃｅｌｌｕｌａｒｉｍｍｕｎｉｔｙ .Ｔｌｙｍｐｈｏｃｙｔｅｓｕｂｓｅｔｉｓｔｉｇｈｔｌｙｒｅｌａｔｅｄｔｏｉｔ .Ｒｅｃｅｎｔｓｔｕｄｉｅｓｈａｖｅｄｅｍｏｎｓｔｒａｔ ｅｄｔｈａｔｍａｎｙｋｉｎｄｓｏｆｍａｌｉｇｎａｎｔｔｕｍｏｒｐａｔｉｅｎｔｓｈａｖｅｔｈｅａｂｎｏｒｍａｌｃｏｎｄｉｔｉｏｎｏｆＴｌｙｍｐｈｏｃｙｔｅｓｕｂｓｅｔａｎｄｌｏｐｓｉｄｅｄｄｅｖｅｌｏｐｍｅｎｔ.Ｗｅｈａｖｅｏｂｓｅｒｖｅｄ 4 5 ｐａ …     

铁路集装箱运输货损原因分析及对策探讨

铁路集装箱运输由于货物包装、装载不当等原因仍然存在一定比例的货物损失。在铁路集装箱运输过程中,针对货物包装不当、集装箱选用不当、货物装载加固不当、集装箱装载加固不当、冷藏货物装运不当等货损原因,从加强集装箱箱体检查、加强集装箱装车检查、加强对冷藏货物运输盯控、加强运输各方责任、加强先进检测监控设备、加强对作业人员的培训、加强箱内货物装载规定制订等方面提出安全保障对策,不断提高集装箱运输市场竞争力。     

提高货运月编计划质量的探讨

货运计划是货运组织的基础，货运月编计划编制质量的高低对全局运输组织具有重要的指导作用；直接影响全局运输效率。通过对目前存在问题的分析，提出加强月编计划上报管理、准确上报次月装车计划建议，并根据实际情况进行合理调整，从而提升货运计划编制质量。