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随着社会经济的快速增长以及铁路的快速发展,使得铁路货车的货运量也得到了快速增长,进而也增强了铁路货车车辆的使用频率,同时也提高了对铁路货车车辆的检修要求,因为只有保证了车辆的运行安全,才能确保不会对铁路运输的效率产生影响。笔者就对铁路货车车辆检修制度进行了探究,先简单分析了车辆检修制度,提出其中还存在的一些问题,最后提出相应的完善途径。 相似文献
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汽车用户在召回发生时,因受到经济损失而维护自身权益是合理的要求,关键是要明确相关的法律依据。货车作为商用汽车,由于长期在外远距离行驶,一旦出现召回,与乘用车相比会面临着召回实施中的种种不便,并因此导致更大的安全隐患。同时,还会造成用户 相似文献
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燃油供给系统是汽油发动机中一个至关重要的组成之一,随着时代发展与科技进步,汽油机燃油供给系统经历了化油器式、单点喷射式、 多点喷射式与缸内直喷式这几个阶段.本文将就这几个阶段的汽油机燃油供给系统的结构、 工作原理与优缺点进行综述. 相似文献
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戴姆勒-奔驰公司是德国最大的跨国公司和工业集团,其属下现有四家子公司,汽车系列产品包括豪华小轿车、商用货车、卡车和大轿车等。梅塞德斯-奔驰公司主要经营汽车,其销售额占整个集团的三分之二。戴姆勒-奔驰公司还以生产工业用柴油发动机和开发铁路系统微电子产品、制造飞机和太空设备等著名。 相似文献
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从土方车频发恶性事故看我国货车后下部防护质量安全 总被引:1,自引:0,他引:1
在土方车频发恶性事故中,缘起钻撞(tlnderrmum)的事故尤为突出。本文通过借助我国货车后下部防护装置标准GB11567.2—2001,分析这类恶性事故的原因,并阐述后防护装置对防止轿车与货车发生钻撞事故的重要性。文章还结合实际情况分析了该标准的适用性及实施效果,并列出了一些典型的问题。为提升货车后下部防护装置的质量、确保行驶安全提出建议。 相似文献
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本文提出的大型商业综合体交通规划设计思路是从交通特性分析入手,在项目策划阶段,应用面向对象分析方法,从多种角度分析各利益主体的交通需求,进而提出交通体系构建策略,在详细规划阶段,做好交通和建筑物的协调设计,使大型商业综合体的交通体系完善且合理,最后提出相应的交通组织和管理手段。 相似文献
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This paper analyzes the way in which countries with international and local truck traffic decide to switch from a simple fuel tax system to a dual system of fuel and distance charge taxes. We show what drives a country to switch and how this affects the level of fuel taxes as well as incentives for other countries to also adopt the dual system. The model is partially able to explain the gradual extension of kilometer charging for trucks in Europe. The model also shows that, in the absence of diesel cars, the gradual introduction of kilometer charges will make fuel taxation for trucks virtually disappear and will lead to a system where truck use is (1) taxed mainly based on distance, (2) is taxed too heavily, and (3) where highest distance taxes are expected in transit countries with a strong market position. When the fuel tax must in addition serve as an externality tax for diesel cars, the introduction of distance charges for trucks will give rise to diesel taxes that are lower than the external cost of diesel cars. For trucks, this leads to a sum of diesel taxes and distance charges that are higher than the external cost of trucks. 相似文献
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This paper develops and implements an analytical framework for estimating optimal taxes on the fuel use and mileage of heavy-duty trucks in the United States, accounting for external costs from congestion, accidents, pavement damage, noise, energy security, and local and global pollution. The analysis allows for endogenous fuel economy, increased auto travel in response to reduced truck congestion, and distinguishes driving by truck type and region. We estimate the optimal (second-best) diesel fuel tax at $1.12 per gallon and implementing it increases welfare by $1.34 billion per annum. Optimizing over both fuel and mileage taxes, and differentiating mileage taxes by vehicle type and region, yields progressively higher welfare gains. The most efficient tax structure involves a diesel fuel tax of 69 cents per gallon and charges on trucks that vary between 7 and 33 cents per mile; implementing this tax structure yields estimated welfare gains of $2.06 billion. 相似文献
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由于核电站的特殊性,乏燃料的运输在核电供应体系中占据重要地位。核电站乏燃料具有辐射性,运输过程中对工作人员、沿途公众和环境等可能会产生危害,又属于公路超限货包运输,所以对公路运输线路要求非常高。本文在利用层次分析法构造乏燃料公路运输线路优选系统的综合评价指标体系的基础上,结合熵权和模糊数学理论,构造基于熵权的乏燃料公路运输选线模糊层次分析模型,为确保核电供应链中乏燃料物流的安全、降低其对环境的影响提供决策依据,以达到安全、可靠和经济合理地完成核电站乏燃料运输的目的。 相似文献
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首先介绍了变频调速技术在交流电动叉车上的发展,其次详细介绍了变频调速的基本原理,根据变频调速的原理和电动叉车对控制系统的要求对变频调速技术在叉车上的应用和特点进行了阐述,最后对变频电动叉车前景提出了展望。 相似文献
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《Socio》2023
With the booming of free-floating bike-sharing systems globally, collecting target bikes effectively becomes increasingly more important in practice. Although many existing studies deal with the transportation of shared bikes with trucks, the process of manual gathering scattered target bikes along truck transportation is seldom explicitly addressed. This study tackles an integrated free-floating shared bike collection problem, which includes manually moving the target bikes to selected gathering sites and transporting the gathered bikes back to the depot with trucks. We propose a location-routing model to optimize the gathering site locations, the bike gathering assignments, and the truck delivering routes integrally under the goal of minimizing a total operation cost, and we develop a heuristic approach to solve the large-size instance of our model. A case study, which is based on the real data of Mobike company in Beijing, China, is conducted to verify the effectiveness of our planning model and solution approach and to generate managerial insights and suggestions for better practices of free-floating shared bike collection. 相似文献
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汽车运输型物流企业规避油价风险的策略研究 总被引:1,自引:0,他引:1
燃油成本是汽车运输型物流企业运营成本的重要组成部分,针对目前油价持续上涨的背景,本文提出通过加强路线管理策略、提高装载率策略、市场运作策略及加强内部管理来规避油价上涨给汽车运输型物流企业带来的成本压力,并提出了上述策略下的一些具体措施. 相似文献
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所有的油田都要经历含水开发期的,原油含水不仅增加了储存、输送、炼制过程中设备的负荷,还增加了升温时的燃料消耗,甚至因为水中含盐等而引起设备和管道结垢或腐蚀。因此,原油含水有百害无一利。本文主要分析了原油脱水的必要性以及各种脱水技术。 相似文献