全文获取类型
收费全文 | 757篇 |
免费 | 31篇 |
专业分类
公路运输 | 28篇 |
综合类 | 191篇 |
水路运输 | 503篇 |
铁路运输 | 2篇 |
综合运输 | 64篇 |
出版年
2024年 | 3篇 |
2023年 | 4篇 |
2022年 | 6篇 |
2021年 | 15篇 |
2020年 | 35篇 |
2019年 | 19篇 |
2018年 | 29篇 |
2017年 | 36篇 |
2016年 | 13篇 |
2015年 | 22篇 |
2014年 | 56篇 |
2013年 | 88篇 |
2012年 | 58篇 |
2011年 | 57篇 |
2010年 | 33篇 |
2009年 | 41篇 |
2008年 | 36篇 |
2007年 | 42篇 |
2006年 | 67篇 |
2005年 | 22篇 |
2004年 | 23篇 |
2003年 | 25篇 |
2002年 | 16篇 |
2001年 | 23篇 |
2000年 | 4篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 5篇 |
1995年 | 3篇 |
1993年 | 2篇 |
1992年 | 1篇 |
排序方式: 共有788条查询结果,搜索用时 15 毫秒
461.
462.
ABSTRACT Marketing policies have gained more importance in container shipping as the industry experiences challenges arising from commoditization. Market segmentation is fundamental to marketing policies, yet it needs a detailed analysis in container shipping. Accordingly, this paper aims to explore homogenous customer groups in container shipping by conducting a segmentation analysis, which can help container lines apply more efficient marketing policies. A survey study is conducted on 356 shippers in Turkey. The study develops five reliable and valid selection criteria factors and applies cluster analysis based on the selection criteria factors. The cluster analysis produces a total of six benefit segments which are differentiable. The segments are significantly identified by the demographic characteristics of shippers. The paper suggests several implications for the marketing policies of container lines. 相似文献
463.
第5代移动通信(5th Generation Mobile Networks,5G)技术具有超大带宽、超低时延和超多连接等特性,将其与人工智能、物联网、大数据和高精度定位等关键技术高效融合,能加速推动航运业的信息化、智慧化发展。对此,分析5G的关键技术特征和产业链价值,论述5G等关键技术在智慧航运、智慧物流、智慧港口、智能制造和智慧金融等5大领域的创新趋势应用。在此基础上,提出全球航运企业运用5G促进自身发展的对策建议。 相似文献
464.
将船期延误与重要港口节点的识别问题相结合,通过传播动力学模型,对世界集装箱海运
网络的传播特性进行分析,发现港口节点传播能力与度值满足幂为16.84的幂律分布,具有无标
度特征,且度值与传播影响力的相关性较强。以 SIS(Susceptible-Infected-Susceptible)模型为基
础,结合网络结构特性,比较不同节点传播影响力评估方法发现,节点间最短路径长度是衡量节
点传播能力的一个重要因素。基于引力模型,提出考虑度值、节点核心位置及节点间最短路径长
度的综合取值法,验证了改进引力模型在世界集装箱海运网络节点传播能力评估中的适用性,发
现综合取值法对模型精确度提高有促进作用。研究得到:世界各港口传播影响力排序,为关键港
口的识别提供了不同视角;高传播影响力港口普遍集中在亚洲区域,其次为欧洲地区;高连通性
与高传播影响力无正相关性。 相似文献
465.
ABSTRACTModal shift from road haulage to short sea shipping (SSS) has been advocated by authorities and researchers for more than two decades. This paper provides a review of literature on modal shift and pinpoints paths for future research on topics in six categories: (1) factors influencing SSS competitiveness, (2) the policy-oriented perspective, (3) environmental legislation, (4) SSS performance, (5) port characteristics, and (6) the multi-agent perspective. In particular, we propose first, in evaluating the performance of SSS versus road haulage in different trade corridors, three performance-related dimensions – the economic dimension (e.g. external costs), the environmental dimension, and the dimension of service quality – should be considered. Second, researchers should use rich, real-world, numerical data and operational research techniques to identify the relative importance of individual drivers and barriers for a modal shift from road haulage to SSS. Third proposed direction is related to assessing which groups of actors certain policies should target. In doing so, researchers should extend their policy-related focus beyond the European Union, which has long encompassed the major geopolitical scope of research on the modal shift. Fourth, to moderate the adverse impact of environmental legislation on SSS, strategic solutions need to be identified. Fifth, we also suggest that the influence of contingencies, particularly port strikes and cyberattacks, on SSS operations and approaches for managing them should be investigated. Sixth, the economic and financial advantages of coordination and alliance for each transport chain agent need to be evaluated. 相似文献
466.
ABSTRACTAccurately estimating fuel consumption of ships is crucial for shipping companies, port authorities, and environmental protection agencies. The bottom-up approach is becoming increasingly popular because it can estimate ship fuel consumption by accounting for ship activity conditions, such as changes in voyage speed, time, and distance; however, its use is still limited when estimating ship fuel consumption. Ship-specific information, such as the daily fuel consumption rate for main and auxiliary engines for every vessel, is expensive to gather, and generally not collected from private shipping companies. To address this research gap, we develop simplified and composite ship fuel consumption models for ocean-going container ships by size using a regression model. To estimate the fuel consumption models for container ships, we rely on ship activity data, including average speed and sailing time, distance, and actual fuel consumption for main and auxiliary engines. This information is obtained from a major container shipping company in Korea. We estimate and validate the parameters associated with fuel consumption for five different container ship sizes, all of which are smaller than the Post-Panamax container ship (15,000 TEU and above). 相似文献
467.
468.
469.
470.
Container vessel fleet deployment for liner shipping with stochastic dependencies in shipping demand
The problem of optimal container vessels deployment is one of great significance for the liner shipping industry. Although the pioneering work on this problem dates back to the early 1990s, only until recently have researchers started to acknowledge and account for the significant amount of uncertainty present in shipping demand in real world container shipping. In this paper, new analytical results are presented to further relax the input requirements for this problem. Specifically, only the mean and variance of the maximum shipping demand are required to be known. An optional symmetry assumption is shown to further reduce the feasible region and deployment cost for typical confidence levels. Moreover, unlike previous work that tends to ignore stochastic dependencies between the shipping demands on the various routes (that are known to exist in the real world), our models account for such dependencies in the most general setting to date. A salient feature of our modeling approach is that the exact dependence structure does not need to be specified, something that is hard, if not simply impossible, to determine in practice. A numerical case study is provided to illustrate the proposed models. 相似文献