排序方式: 共有59条查询结果,搜索用时 187 毫秒
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何骏 《上海交通大学学报(哲学社会科学版)》2012,20(1):80-85
本文以全国经济最发达的地区之一,泛长三角区域整体经济发展水平为背景,在泛长三角区域工业结构分析的基础上,对泛长三角区域的工业优势进行研究。就工业结构而言,上海市和江苏省存在强竞争关系,上海市与安徽省存在强互补关系;就工业优势而言,上海市的优势工业包括装备制造业以及石油加工、炼焦及核燃料加工业,江苏省以设备制造业和化学原料及化学制品制造业为主,浙江省以传统加工业为主导,安徽省则以资源优势工业为主。泛长三角区域各省市应充分利用各自的工业优势,进行横向和纵向协作,加快泛长三角区域工业升级和联动。 相似文献
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引入小波神经网络的自适应机制,建立基于小波神经网络的多属性综合评价模型EMWNN(15,20,1),并进行了实际应用. 相似文献
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巴黎轨道交通市域线(RER)的发展历程 总被引:6,自引:5,他引:1
介绍了巴黎轨道交通区域快速线(RER)的发展历程.着重介绍了1965~1995年间RER线的建设过程.RER线的修建,一方面充分利用了市郊既有的铁路设施,另一方面在市区建设新的地下线路,使人们不仅可以快速穿越整个巴黎市,也可以从市郊不经换乘就能到达市中心;此外,也使巴黎运输公司(RATP)所经营的地铁线路与法国国营铁路(SNCF)所经营的市郊铁路可以在同站台方便地换乘.RER发展至今已形成了A、B、C、D等4线组成的网络. 相似文献
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高寒地区沥青路面主导病害调研与分析 总被引:1,自引:0,他引:1
以高寒地区沥青路面病害调研资料为基础,对高寒地区沥青路面病害进行特征描述与原因分析,归纳总结出该类地区沥青路面的主导破坏形式,对高寒地区沥青路面结构与材料的研究工作具有指导作用,同时对类似地区公路建设中沥青路面结构与材料设计也具有借鉴作用. 相似文献
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Whilst congestion in automobile traffic increases trip durations, this is often not the case in rail-based public transport where congestion rather leads to in-vehicle crowding, often neglected in empirical studies. Using original survey data from Paris, this article assesses the distribution of comfort costs of congestion in public transport. Estimating willingness to pay for less crowded trips at different levels of in-vehicle passenger density we cannot reject a simple linear relationship between crowding costs and density. We apply our results to the cost-benefit analysis of a recent Parisian public transport project. 相似文献
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李闻 《铁路工程造价管理》2020,(2):10-13
根据《铁路基本建设工程设计概(预)算编制办法》风沙地区施工增加费的相关规定,大风高发月风力及其累计时间达到标准规定的数值时,可根据调查资料另行分析计算相关费用。为研究不同风力条件下施工降效程度,合理确定施工增加费提供数据支撑,以西北地区某新建铁路工程为依托,通过对现场风力监测,以及不同风力条件下各施工工序人工和机械消耗量现场测定,研究分析施工降效程度和增加的费用。可为其他项目风沙施工增加费的分析提供技术参考。 相似文献
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Activity-based modelling approaches require a typical survey instrument which can collect the finer details of activities of each individual over both time and space. This paper focuses on the design of a new survey instrument called an activity-travel diary; examines its method of administration; and analyses activity-travel behaviour in the context of developing countries. The Mumbai Metropolitan Region in India is selected as the study area. With the aim of understanding the activities of each individual over a period of time, a pilot survey was conducted in a continuous time frame for a period of 15 days, followed by a main survey. The analysis of data collected by the instrument reveals some interesting facts regarding the relationships between socioeconomic attributes, activities and trip making behaviour. Identification of interactions among households and other members were also facilitated by the newly designed diary, which is not a well-versed topic for research in the context of a developing economy like Mumbai's. 相似文献
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