改进层次分析法在配送中心选址中的应用

分析了配送中心选址的重要性及现有的方法,提出采用改进层次分析法进行配送中心的选址决策。建立评价指标体系的层次结构模型,确定各项评价指标的权重,采用改进层次分析法和模糊评价法相结合的方法对具体的实例进行综合评价。     

不确定型层次分析法在桥梁综合评估中的应用研究

采用确定型层次分析法评估桥梁状态,存在指标的不确定性和模糊性。而利用不确定型层次分析法进行桥梁结构的多级模糊综合评估,建立桥梁的安全性评估模型及指标体系,运用不确定型权重判断矩阵和区间相离度概念,建立桥梁状态综合评估的单目标模型,求解区间权重的最优值,利用等级隶属度函数得出桥梁的评估等级。并通过实例证明不确定型层次分析法在桥梁状态综合评估中的可行性。     

客运专线预制梁场选址综合评价决策模型研究与应用

分析影响客运专线预制梁场选址的因素，建立客运专线预制梁场选址综合评价指标体系及决策评价模型，利用层次分析法AHP确定各评价指标权重，并结合客运专线预制梁场场址方案决策案例，对该模型进行应用分析。     

基于战略环境评价的都市圈城际交通规划理论框架

战略环境评价是保证都市圈交通可持续发展的重要手段.将交通规划和战略环境评价的可持续发展思想结合起来,以社会、经济、环境作为交通规划环境评价的相关指标,通过专家调查法和层次分析法确定权重,利用综合协调法评价相关方案,基于分析结果有针对性地提出相应改进或替代设计方案,并根据战略环境评价贯穿设计全过程和需要反复评价的特点,提出都市圈城际交通规划的理论框架.     

基于层次分析法的铁路运输岗位评价要素权重确定

阐述了在岗位评价中选择层次分析法的理论依据及设计思路,在问卷调查和预测试的基础上,对层次分析法在铁路运输岗位评价要素权重确定的实践中存在问题进行了修正.最后对铁路运输岗位评价中各要素权重进行了再测试和确定.     

组合评价法在综合交通枢纽客运站布局评价中的应用

在确定枢纽客运站布局评价指标体系的基础上,将组合评价法应用于枢纽客运站布局的评价,首先采用层次分析法与熵值法相结合的赋权方法确定指标的权重,再通过基于关联度分析的灰色综合评价方法,计算出备选方案与最优方案之间的关联度,从而得到备选方案的优劣次序。通过实例分析说明组合评价法科学合理、简便易行。     

铁路集装箱办理站布局综合评价模型中权重的确定方法

铁路集装箱办理站布局综合评价模型中，权重的确定是非常重要的。通过将层次分析法和局部变权法相结合的综合评价模型、产生权重方法的论述，以具体实例说明该方法的优越性。     

综合交通运输体系安全评价模型的建立

为构建综合交通运输体系安全评价模型,首先建立评价指标体系,并建立希尔伯特指标空间,运用泛函理论和层次分析法确定指标层和准则层的权重,再通过模糊综合评判法确定准则层和目标层的安全等级.通过该评价模型,可对不同城市或地区综合交通运输的安全状况做出评价.     

城市轨道交通线网规划方案综合决策

为解决目前城市轨道交通线网规划方案综合决策问题中信息不完全和权重主观性强的问题,提出基于熵权法和灰色关联分析法的城市轨道交通线网规划综合决策方法。从线网结构、运营效果、社会效益、城市发展、建设实施5个方面构建线网规划方案综合评价指标体系,在此基础上建立基于熵权法和灰色关联分析法的城市轨道交通线网规划方案综合决策方法,采用熵权法确定权重,依据灰色关联分析法遴选最佳方案。最后,通过对长沙市轨道交通线网远景规划3个备选方案的评价分析,验证该方法的科学合理性。     

多样化军事行动油料保障力量建设评估

本文针对多样化军事行动油料保障力量建设评估问题,构建了评估指标体系,采用层次分析法确定了评估指标权重,并运用模糊综合评价法对某战区多样化军事行动油料保障力量建设实例进行了评估分析,得到了整体评估结果,为检验多样化军事行动油料保障力量建设效果提供了量化依据。     

Location of cargo terminals in metropolitan areas of developing countries: the Brazilian case

This article presents a procedure for establishing and ranking the areas that are candidates for building truck cargo terminals, based on the analytic hierarchy process (AHP) and considering location factors, with focus on accessibility considerations, expressed by indicators derived from graph theory. Accessibility is thus defined objectively for each area, contemplating its needs regarding production or consumption of cargo or promotion of intermodal transport of products. The proposed approach determines the most suitable area for locating the terminal according to the perception of each actor participating in the process as well as the set of actors, seeking to conjugate conflicting interests and facilitate convergence and the establishment of negotiated solutions. With this, it provides a more transparent and participative decision-making process and supplies basic elements for government bodies to formulate their socioeconomic development policies. The application of this procedure in the greater Rio de Janeiro metropolitan region demonstrated its feasibility in developing countries and in contexts with restricted data, funding and planning.     

企业物流配送模式选择的TOPSIS多目标决策研究

介绍目前主要的物流配送模式，建立物流配送模式选择的评价指标体系，利用熵权法和AHP方法相结合，得出企业配送模式选择中的各个评价指标的权重，使评价结果更具有说服力。并且引入TOPSIS法有效解决配送模式选择的多目标决策问题，并对各备选模式进行了定量排序，为企业物流配送模式的决策提供依据。     

层次分析法在取送调车作业计划编制中的应用

在铁路技术站,货场、专用线取送车计划的质量,对车站的车辆停留时间、调车机作业效率等作业指标有很大影响,根据衡量调车计划质量的标准及细分的指标,结合有关计算机技术在车站日常生产决策中的应用,用多目标决策中的层次分析法(APH)选择最优的取送调车作业计划,从而提高调车机工作效率,降低车站的车辆中、停时指标。     

兰州铁路枢纽总图方案研究

合理确定兰州铁路枢纽布局有助于完善西北地区铁路网络,促进兰州—西宁城市群发展,提升欧亚大陆桥互联互通能力,发挥兰州地区的桥头堡作用。阐述兰州铁路枢纽现状,指出枢纽内客运站分工及货运设施功能存在问题,提出枢纽发展规划;研究提出兰州铁路枢纽总图方案,包括干支线、疏解线及联络线工程方案与总图方案设计。研究结果表明,兰州将形成衔接11条铁路干线,南客北货的大型环状枢纽格局,更好地支撑西北地区核心路网运输。     

最佳取送车次数问题的改进

合理确定取送车作业次数有利于减少货车在站停留时间和相关的运营支出。通过对取送车作业过程和货物作业车在站停留时间的分析,以及对货物装卸时间进行合理调整,对一昼夜取送车最佳次数的确定进行改进,从而在原研究成果基础上对最佳取送次数的公式做相应修改,通过实例说明改进后更加符合实际情况。     

UK road freight energy use by product: trends and analysis from 1985 to 1995

Since the early 1980s, energy use in road freight has been rising much faster than overall energy use in the UK. To better understand the factors driving this rapid growth, we carried out an analysis of road freight energy use trends across 14 product sectors from 1985 to 1995. Growth in length and complexity of supply chains, rather than growth of output, is shown to be the main driver of increasing freight energy consumption, with high value products having the highest energy use per tonne lifted. Policy options and a proposal for improved estimation of energy consumption are also discussed.     

On structural inelasticity of modal substitution in freight transport

At the European level there is an increasing focus on how freight transport can be moved from trucks on roads to more environmentally friendly modes such as rail and ship. A large proportion of the transport services between OD pairs, however, cannot be substituted since there is only one alternative available. The paper investigates the magnitude of this “structural inelasticity” of modal substitution in freight transport due to a sparser layout of rail and ship-based freight networks compared to road. In the analysis we use a recent Scandinavian freight demand model covering more than 800 zones. We find that the structural inelasticity is very significant - in particular for transportation over less than 500 km. Moreover, the inelasticity varies greatly with commodity groups and between OD pairs, and it depends strongly on the port and rail infrastructure. The results suggest that pure charging instruments (road pricing for trucks) in many regions will have limited mode substitution impacts. However, if combined with structural changes in terms of improved infrastructure for rail and ship, impacts may be greater.     

客运专线引入铁路枢纽的方案评价

针对客运专线引入铁路枢纽问题,分析了车站选址的影响因素,设计出评价指标和指标体系的结构模型,并结合层次分析法说明评价过程。最后,利用该方法对京广客运专线引入衡阳枢纽的车站选址方案进行了评价。     

价值工程在铁路物资采购中的应用

按照价值工程的原理和铁路物资采购制度,在确定物资采购方案时,运用层次分析法对物资供应厂家进行价值系数的评定,根据价值系数的高低确定采购方案。通过应用实例说明,价值工程在铁路物资采购中的应用,为采购人员决策提供科学依据。     

The dynamics between freight volatility and fleet size growth in dry bulk shipping markets

This paper studies the relationship between the time-varying volatility of dry bulk freight rates and the change of the supply of fleet trading in dry bulk markets. An abundance of research has been done to understand the time-varying characteristics of freight rate volatility, yet few have discussed the determinants of freight volatility. We therefore examine freight volatility against the changes in fleet size and other shipping market variables over January 1973–October 2010. The study employs a two-step model specification. The first step is the measurement of freight rate volatility through an AR-GARCH model; the second step is the analysis of the relationship between freight rate volatility and fleet size growth through a GMM regression. We confirm similar findings in the literature that freight rate volatility is time varying. Furthermore, the results reveal that the change in fleet size positively affects freight rate volatility, while the spot rate volatility of Capesize dry bulk exhibits a stronger reaction to the change in fleet size. The results of this study contribute in a general sense to understanding the systematic risk of shipping markets.