全文获取类型
收费全文 | 145篇 |
免费 | 2篇 |
专业分类
公路运输 | 32篇 |
综合类 | 6篇 |
水路运输 | 42篇 |
铁路运输 | 3篇 |
综合运输 | 64篇 |
出版年
2018年 | 8篇 |
2017年 | 4篇 |
2016年 | 5篇 |
2015年 | 2篇 |
2014年 | 7篇 |
2013年 | 24篇 |
2012年 | 5篇 |
2011年 | 7篇 |
2010年 | 7篇 |
2009年 | 7篇 |
2008年 | 9篇 |
2007年 | 9篇 |
2006年 | 5篇 |
2005年 | 2篇 |
2003年 | 6篇 |
2002年 | 3篇 |
2000年 | 1篇 |
1999年 | 3篇 |
1998年 | 6篇 |
1997年 | 3篇 |
1996年 | 2篇 |
1995年 | 1篇 |
1993年 | 3篇 |
1991年 | 2篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1981年 | 1篇 |
1980年 | 2篇 |
1977年 | 3篇 |
1976年 | 1篇 |
1975年 | 3篇 |
1974年 | 1篇 |
1972年 | 1篇 |
排序方式: 共有147条查询结果,搜索用时 375 毫秒
51.
52.
Hwa-Joong Kim Young-Tae Chang Paul T.-W. Lee Sung-Ho Shin Min-Jeong Kim 《Maritime Policy and Management》2013,40(1):103-122
This paper considers a multimodal transportation problem, which is the problem of determining the transportation flow, i.e. volume of container cargoes, and the transportation mode in each trade route, for the objective of minimizing the sum of shipping and inland transportation costs. The problem takes account of two restrictions: maximum cargo volumes capacitated at each seaport and maximum number of vehicles available at each transportation mode. To solve optimally the problem, this paper employs a mixed integer programming, which is an operations research technique. A case study is performed on the container cargo data in Korea and we draw several implications to improve efficiency in the transportation of international trade cargoes in Korea. 相似文献
53.
Modeling residential sorting effects to understand the impact of the built environment on commute mode choice 总被引:5,自引:2,他引:3
Abdul Rawoof Pinjari Ram M. Pendyala Chandra R. Bhat Paul A. Waddell 《Transportation》2007,34(5):557-573
This paper presents an examination of the significance of residential sorting or self selection effects in understanding the
impacts of the built environment on travel choices. Land use and transportation system attributes are often treated as exogenous
variables in models of travel behavior. Such models ignore the potential self selection processes that may be at play wherein
households and individuals choose to locate in areas or built environments that are consistent with their lifestyle and transportation
preferences, attitudes, and values. In this paper, a simultaneous model of residential location choice and commute mode choice
that accounts for both observed and unobserved taste variations that may contribute to residential self selection is estimated
on a survey sample extracted from the 2000 San Francisco Bay Area household travel survey. Model results show that both observed
and unobserved residential self selection effects do exist; however, even after accounting for these effects, it is found
that built environment attributes can indeed significantly impact commute mode choice behavior. The paper concludes with a
discussion of the implications of the model findings for policy planning.
相似文献
Paul A. WaddellEmail: |
54.
在美国,所有进口汽车制造商都推出了2006款新车型.其中包括两种混合动力车。这些进口车也将能达到美国国产车的维修技术要求,如按照SAEJ2534标准的车载电脑通用再编程技术。本田、日产、丰田以及马自达和宝马汽车都可通过网络实现这一功能。本文将介绍一些新的技术。 相似文献
55.
为提高汽车性能而进行的改装工作,可以为独立汽修店提供一些营利的机会,但许多汽修厂还没有意识到这一点。不过,与通常的维修业务不同的是,进行汽车改装所产生的后果,车主必须愿意承担至少一部分的责任。 相似文献
56.
Vehicle Dynamics Estimation Using Kalman Filters 总被引:1,自引:0,他引:1
Paul J.TH. Venhovens Karl Naab 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1999,32(2):171-184
This paper deals with the application of stochastic state estimators in vehicle dynamics control. It is often unrealistic to assume that all vehicle states and the disturbances acting on it can be measured. System states that cannot be measured directly, can be estimated by a Kalman Filter. The idea of the Kalman filter is to implement a model of the real system in an on-board computer in parallel with the system itself. This paper will give 3 examples of this principle applied to automotive systems. 相似文献
57.
Catherine Jeandel Diana Ruiz-Pino Elvis Gjata Alain Poisson Christian Brunet Edwige Charriaud Frank Dehairs Daniel Delille Michel Fiala Charles Fravalo Juan Carlos Miquel Young-Hyang Park Philippe Pondaven Bernard Quguiner Suzanne Razouls Bernard Shauer Paul Trguer 《Journal of Marine Systems》1998,17(1-4)
Between January 1990 and March 1995, the research project KERFIX undertook the first regular noncoastal multiyear acquisition of parameters related to the carbon cycle in the Southern Ocean at a time series station located at 50°40′ S–68°25′ E, 60 miles southwest of the Kerguelen Islands. The objectives of KERFIX are (1) to monitor the ocean/atmosphere CO2 and O2 exchanges and to understand which processes govern these exchanges (2) to observe and interpret the seasonal and interannual variability of the production, flux, decomposition and dissolution of carbon and associated elements at this location. In addition, micropaleontological studies describe the present and past flux dynamics in this oceanic area, to improve the knowledge of the transfer functions of some oceanographic proxies. This paper presents a survey of the KERFIX program: scientific objectives, organization of the field operations and some main results obtained since the beginning of KERFIX program, as well as the results of the temporal evolution of hydrological, chemical and biological parameters. 相似文献
58.
59.
刘俊田 《西安交通大学学报(英文版)》1998,(2)
Occlusivevasculardisorders,bothvenousandarterial,aresomeofthemostcommoncausesofmorbidityandmortalityindevelopedcountries.Theaimoftherapyinsuchconditionsis,firstly,torestoreandmaintainbloodflowtotheaffectedtissueororgan,andsecondly,torestorethesystemtothenormalhaemostaticstatewithoutovercompensatingandproducingcomplicationssuchashaemorrhage.Thrombolyticagents,suchasrecombinanttissueplasminogenactivator(rt-PA),arewidelyusedinthetreatmentofpatientswithacutemyocardialinfarction.However,successful… 相似文献
60.
This paper specifies a dispatching decision support system devoted to managing intermodal logistics operations while countering delay and delay propagation. When service disruptions occur within a logistics network where schedule coordination is employed, a dispatching control model determines through an optimization process whether each ready outbound vehicle should be dispatched immediately or held to wait for some late incoming vehicles. Decisions should consider potential missed-connection costs that may occur not only at the next transfer terminals but also at hubs located further downstream. Numerical examples and a sensitivity analysis with different slack time settings for attenuating delay propagation are presented. 相似文献