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排序方式: 共有1125条查询结果,搜索用时 31 毫秒
961.
浅谈高速公路联网收费管理 总被引:1,自引:0,他引:1
从正、反两方面论述高速公路实施联网收费的必要性 ,以及进行高速公路联网收费管理的一些建议和规划的探讨 相似文献
962.
利用安装在振动成型设备上的加速度传感器、位移传感器和压力传感器,实测出振动压实过程中振动设备上的加速度、位移和打击力信号随压实时间的变化曲线。并分析响应信号与被压材料的相互关系。 相似文献
963.
介绍了苏通大桥在设计、施工、科研方面采取的优化钢筋保护层厚度、优选原材料、优化配合比、开展混凝土施工质量全程控制等耐久性保障措施,与设计值相比,控制后施工配合比水胶比方差≤5,保护层厚度合格率达到85%以上。 相似文献
964.
为了研究预应力混凝土连续箱梁桥后期下挠影响因素,以一典型3跨预应力混凝土连续梁桥为研究对象,采用规范和有限元数值计算结合的方法,分析了箱梁预应力损失和变形的时变效应,在此基础上,进一步分析了边中跨比、合龙顺序和合龙压重等因素对箱梁后期下挠的影响。分析结果表明,预应力混凝土连续箱梁桥的时变效应明显,收缩徐变引起的预应力损失和后期跨中下挠值较大;适当地增加边中跨比有利于减小后期中跨的跨中下挠;合龙时,先边跨后中跨合龙并采取适量的压重,是减小跨中后期下挠的有效手段。 相似文献
965.
胡海峰 《武汉船舶职业技术学院学报》2007,6(3):101-103,106
英译汉是高职高专英语教学中的难点。本文联系高职高专学生在A级考试中出现的实际问题,阐述了英译汉教学的必要性,并从教学实践出发,介绍了培养学生英译汉能力的方法,并提出了提高学生英译汉水平的三点建议,希望对广大高职高专大学英语教师具有一定参考价值。 相似文献
966.
针对P2P网络中资源查找以及其自身存在的问题,提出了一种基于二叉树的P2P网络模型。该模型借鉴了可信计算中的直接匿名认证机制、DHT、超级节点的思想,在此基础上设计了一种高效的可扩展查找算法,解决P2P网络查询延迟、冗余信息、可扩展性等关键问题。模拟实验表明,该算法能够有效减少网络带宽消耗并能显著提升P2P网络的查找效率。 相似文献
967.
Estimation of the determinants of bicycle mode share for the journey to work using census data 总被引:1,自引:0,他引:1
A model is presented that relates the proportion of bicycle journeys to work for English and Welsh electoral wards to relevant
socio-economic, transport and physical variables. A number of previous studies have exploited existing disaggregate data sets.
This study uses UK 2001 census data, is based on a logistic regression model and provides complementary evidence based on
aggregate data for the determinants of cycle choice. It suggests a saturation level for bicycle use of 43%. Smaller proportions
cycle in wards with more females and higher car ownership. The physical condition of the highway, rainfall and temperature
each have an effect on the proportion that cycles to work, but the most significant physical variable is hilliness. The proportion
of bicycle route that is off-road is shown to be significant, although it displays a low elasticity (+0.049) and this contrasts
with more significant changes usually forecast by models constructed from stated preference based data. Forecasting shows
the trend in car ownership has a significant effect on cycle use and offsets the positive effect of the provision of off-road
routes for cycle traffic but only in districts that are moderately hilly or hilly. The provision of infrastructure alone appears
insufficient to engender higher levels of cycling.
John Parkin joined academia after a career in consultancy. He has experience of all stages of the promotion of transport infrastructure, from planning and modelling to design and implementation. His specialises in transport engineering with an emphasis on design innovation, sustainability principles and community benefit. Mark Wardman has been involved in transport research for over 20 years. His main research interests are in behavioural response models in general and stated preference in particular. Areas of application have included public transport, notably rail, with several novel applications to cycling and environmental issues. Matthew Page research interests include transport policy and how it has developed, the environmental impacts of transport, the impacts of transport on climate change, and walking and cycling. 相似文献
Matthew PageEmail: |
John Parkin joined academia after a career in consultancy. He has experience of all stages of the promotion of transport infrastructure, from planning and modelling to design and implementation. His specialises in transport engineering with an emphasis on design innovation, sustainability principles and community benefit. Mark Wardman has been involved in transport research for over 20 years. His main research interests are in behavioural response models in general and stated preference in particular. Areas of application have included public transport, notably rail, with several novel applications to cycling and environmental issues. Matthew Page research interests include transport policy and how it has developed, the environmental impacts of transport, the impacts of transport on climate change, and walking and cycling. 相似文献
968.
969.
引导大学生树立为国分忧思想是非常必要的和重要的,为国分忧作为一种担当,是高度责任感和崇高使命感的融合,是爱国主义思想内容之一,是当代大学生思想进步的重要表现。高校要不断加强和改进大学生思想政治教育,努力激发学生爱国主义的激情,引导他们树立起为国分忧的思想。 相似文献
970.
刘成群 《上海交通大学学报(哲学社会科学版)》2012,20(4):92-98
清华简《耆夜》记载毕公姬高是"勘黎"之战的主将,这使我们对毕公周初重臣地位的形成有了进一步的认识。根据清华简《耆夜》并结合出土金文推断,毕公应该有子封于黎(楷);又根据清华简《祭公》的记载,毕公后裔毕曾在周穆王时期位列三公。这证明毕公家族与周公、召公、太公家族一样,也遵循着一子就封诸侯国、一子"世为王臣"的体制。 相似文献