全文获取类型
收费全文 | 219篇 |
免费 | 17篇 |
专业分类
公路运输 | 35篇 |
综合类 | 84篇 |
水路运输 | 24篇 |
铁路运输 | 63篇 |
综合运输 | 30篇 |
出版年
2024年 | 1篇 |
2022年 | 2篇 |
2021年 | 1篇 |
2020年 | 9篇 |
2019年 | 13篇 |
2018年 | 6篇 |
2017年 | 11篇 |
2016年 | 9篇 |
2015年 | 9篇 |
2014年 | 18篇 |
2013年 | 9篇 |
2012年 | 13篇 |
2011年 | 22篇 |
2010年 | 12篇 |
2009年 | 16篇 |
2008年 | 11篇 |
2007年 | 14篇 |
2006年 | 15篇 |
2005年 | 13篇 |
2004年 | 7篇 |
2003年 | 1篇 |
2002年 | 5篇 |
2001年 | 7篇 |
2000年 | 2篇 |
1999年 | 2篇 |
1998年 | 3篇 |
1995年 | 2篇 |
1994年 | 1篇 |
1990年 | 2篇 |
排序方式: 共有236条查询结果,搜索用时 203 毫秒
71.
72.
陈家润 《湖北汽车工业学院学报》2006,20(4):59-62
通过对平衡积分卡的理论介绍,提出了在实践中应用平衡积分卡应注意的几个问题,从而得出这种方法应该在我国企业绩效管理中得到更加广泛应用的结论。 相似文献
73.
《运输规划与技术》2012,35(8):825-847
ABSTRACTIn recent years, public transport has been developing rapidly and producing large amounts of traffic data. Emerging big data-mining techniques enable the application of these data in a variety of ways. This study uses bus intelligent card (IC card) data and global positioning system (GPS) data to estimate passenger boarding and alighting stations. First, an estimation model for boarding stations is introduced to determine passenger boarding stations. Then, the authors propose an innovative uplink and downlink information identification model (UDI) to generate information for estimating alighting stations. Subsequently, the estimation model for the alighting stations is introduced. In addition, a transfer station identification model is also developed to determine transfer stations. These models are applied to Yinchuan, China to analyze passenger flow characteristics and bus operations. The authors obtain passenger flows based on stations (stops), bus lines, and traffic analysis zones (TAZ) during weekdays and weekends. Moreover, average bus operational speeds are obtained. These findings can be used in bus network planning and optimization as well as bus operation scheduling. 相似文献
74.
75.
机舱油气浓度数据记录仪可以对船舶机舱油气浓度的数据进行记录分析、超限报警、存储报警数据,避免机舱发生火灾事故,对保障机舱安全具有重要作用。采用二线制串行铁电存储器作为机舱油气实时数据存储设备、内部集成电路总线协议,同传统的存储器相比,可以显著提高油气浓度超限报警的存储速度和存储容量,准确记录并且长时间地保存报警数据,延长油气浓度数据记录仪的使用寿命,为以后查找报警记录提供准确可靠的原始数据。 相似文献
76.
取消省界收费站以来,使用ETC通行车辆占比逐渐提升,但仍有部分车辆采用取CPC卡的方式通行。为了减轻现场人员工作强度、提升服务质效、降低企业运营成本,越来越多的高速公路收费站开始应用自动发卡机器人。通过综述现有自动发卡机器人应用现状,对比不同自动发卡机器人的优势与劣势,分析自动发卡机器人现存挑战,提出优化建议,为高速公路收费运营提供参考。 相似文献
77.
78.
79.
80.
In recent years, there has been increased interest in using completely anonymized data from smart card collection systems to better understand the behavioural habits of public transport passengers. Such an understanding can benefit urban transport planners as well as urban modelling by providing simulation models with realistic mobility patterns of transit networks. In particular, the study of temporal activities has elicited substantial interest. In this regard, a number of methods have been developed in the literature for this type of analysis, most using clustering approaches. This paper presents a two-level generative model that applies the Gaussian mixture model to regroup passengers based on their temporal habits in their public transportation usage. The strength of the proposed methodology is that it can model a continuous representation of time instead of having to employ discrete time bins. For each cluster, the approach provides typical temporal patterns that enable easy interpretation. The experiments are performed on five years of data collected by the Société de transport de l’Outaouais. The results demonstrate the efficiency of the proposed approach in identifying a reduced set of passenger clusters linked to their fare types. A five-year longitudinal analysis also shows the relative stability of public transport usage. 相似文献