渤海大道公路建设项目国民经济评价

通过渤海大道的国民经济评价案例,阐述了公路建设项目国民经济评价方法。对于评价参数、费用效率、敏感性分析的详细计算方法进行了探讨。     

TPM理论在公路机械设备管理中的应用

通过对当前公路机械设备管理中存在的设备效率不高、管理人员素质不高、修理维护成本较高等现状进行分析,引入全员生产维修(TPM)管理理念,并在公路机械设备管理中提出相应的TPM管理模式,对公路部门或施工单位的机械设备管理具有一定的参考价值.     

空管运行效率评估指标体系研究

空管运行效率是衡量一个区域空管系统总体运行状态的综合指标,它受到很多与空管系统有关因素的影响。基于人机环系统工程理论,结合空管运行实际情况,充分分析空管运行效率的影响因素,建立空管运行效率评估的原则、标准和指标体系。     

信号协调控制下城市干道运行效率评价研究

以信号协调控制的城市干道为研究对象,从平均行程延误、排队长度、停车率、行程车速及饱和度方面建立干道运行效率评价指标,将信息论中熵值理论引入干道运行效率评价中,确定各评价指标的权重。基于未确知测度理论,建立城市干道运行效率等级评价和排序模型。以某具体干道作为实例分析,结果表明：基于熵权的未确知测度综合评价用于干道信号协调控制运行效率评价是切实可行的。     

Rebound effects caused by the improvement of vehicle energy efficiency: An analysis based on a SP-off-RP survey

This study provide a straightforward way of examining the rebound effects of switching to more fuel efficient technologies, as well as determining the distribution of the effects in the household sector, including both the residential and transport sectors. A SP-off-RP survey conducted in Japan in 2012 asked people to state their preference for the reallocation behaviors after informing them of their annual operating cost saving resulting from the vehicle efficiency improvement. Coupled who save money from relocation are more likely to spend this either on housing features or transport; supporting the idea of rebound effects, although not only limited to within the transport sector. Regarding the distribution of rebound effects, domestic appliances are more likely to be affected than vehicles.     

Social and spatial effects of transforming the private vehicle fleet in Brisbane,Australia

Transformation of the motor vehicle fleet has been an important feature of the world’s peak car phenomenon. Very few urban transport studies have explored such important changes in large urban cities. Using an innovative green vehicle datasets constructed for 2009 and 2014, this paper investigates the ongoing change in urban private vehicle fleet efficiency (VFE) in Brisbane. The spatial patterns of VFE change were examined with social-spatial characteristics of the urban area. The results showed that the social and spatial effect of VFE changes remain uneven over urban space. The inner urban areas have experienced higher level of VFE change, whilst people in the outer and oil vulnerable areas showed a low tendency in shifting to more efficient vehicles. The implication of VFE change for future household vehicle adoption was also evaluated based on a cost-benefit analysis of new vehicle technology costs and expected fuel savings for households that choose a fuel efficient vehicle. The results show that imposing a stronger national fuel economy target in the long term would accelerate evolution of vehicle fleets and oil vulnerability reduction in Brisbane.     

桥梁预制拼装体外预应力耗损及转向块功效

计算对接缝压实耗损、摩阻耗损和收缩徐变耗损,借助工程有限元ANSYS系统对块式、肋式转向块的功效适用性开展模拟计算分析,揭示预应力耗损和两种转向块结构型式对工程技术实现以及施工中的结构安全性影响,对同类桥梁建设提供技术参考.     

复杂地质条件下港口集装箱码头堆场面层结构设计

介绍深圳CCT港区惠州QCT港区集装箱码头堆场面层结构,采用土工格栅代替习惯用的碎石垫层和改进后的水泥稳定砂垫层,简化了施工工艺,提高了工程质量,降低了工程成本.     

利用汽车制动能量提高发动机充量系数的仿真研究

分析了汽车制动能量回收再利用的几种典型方式及现状,研究了利用汽车制动能量提高发动机充量系数,从而提高发动机功率的理论依据,并利用GT-POWER软件进行了模拟分析。分析表明,利用制动能量能有效提高发动机的充量系数。     

金融危机将孕育新一轮的科技革命

从历史上经济危机催生科技革命谈起,分析了全球危机凸显科技创新的紧迫性,阐述了面对金融危机,中国、美国、俄罗斯、法国等世界大国出台的加快科技创新的相应措施。