全文获取类型
收费全文 | 2456篇 |
免费 | 205篇 |
专业分类
公路运输 | 320篇 |
综合类 | 877篇 |
水路运输 | 109篇 |
铁路运输 | 1252篇 |
综合运输 | 103篇 |
出版年
2024年 | 8篇 |
2023年 | 15篇 |
2022年 | 50篇 |
2021年 | 79篇 |
2020年 | 92篇 |
2019年 | 68篇 |
2018年 | 53篇 |
2017年 | 74篇 |
2016年 | 77篇 |
2015年 | 107篇 |
2014年 | 205篇 |
2013年 | 153篇 |
2012年 | 198篇 |
2011年 | 232篇 |
2010年 | 186篇 |
2009年 | 156篇 |
2008年 | 159篇 |
2007年 | 257篇 |
2006年 | 166篇 |
2005年 | 103篇 |
2004年 | 72篇 |
2003年 | 42篇 |
2002年 | 20篇 |
2001年 | 25篇 |
2000年 | 19篇 |
1999年 | 6篇 |
1998年 | 10篇 |
1997年 | 5篇 |
1996年 | 3篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 4篇 |
1992年 | 4篇 |
1991年 | 5篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1986年 | 1篇 |
排序方式: 共有2661条查询结果,搜索用时 31 毫秒
91.
公交客流规模测算往往存在调查成本受限和准确度要求较高的矛盾.提出基于公交IC卡历史数据与人工补充调查数据的数据融合测算方法,以准确推算公交客流规模.首先根据公交线路的基本属性,采用聚类分析方法划分线路类型,从每一类中选择具有代表性的线路.基于IC卡数据分析公交客流时变特征,运用有序样本聚类Fisher算法将线路小时刷卡量进行聚类分析.划分刷卡量相似时段,进而采用优化方法确定调查抽样率,确定相应的调查车辆进行人工补充调查,最终经过数据融合计算获得公交客流规模.基于上海市某辖区IC卡数据进行案例分析,测算得到三类公交线路的日均客流量. 相似文献
92.
Taotao Deng 《运输规划与技术》2013,36(2):201-219
Bus Rapid Transit (BRT) has emerged as a cost-effective transport system for urban mobility. As a relatively new form of Mass Transit, its ability to provide a high-quality transport service and potential to stimulate land development remain largely unexplored. This study intends to investigate the public attitude towards BRT services, as well as respondents’ perception of living near BRT stations, using the Beijing Southern Axis BRT system as a case study. A data-set of responses to 525 questionnaires were assembled and analysed using a combination of statistical techniques. The results show that BRT has gained great popularity among passengers, and brought about a positive impact on the attractiveness of residential property. The data identify that the majority of passengers are work-related commuters and use BRT more than once a day. The captive users have a higher satisfaction than choice users with respect to reliability, comfort & cleanliness and overall satisfaction with the BRT service. It is argued that the BRT has significantly improved the attractiveness of residential property along the BRT corridor. 相似文献
93.
94.
Understanding public perception of the oceans, and relationship between society and the sea is an important key to the sustainable management of marine resources. This research reports the first population-based survey on Taiwanese public knowledge, attitudes, and actions on marine-related issues. The stratified random sampling by county was completed with 1,120 telephone respondents from October to December 2010. More than 60% of the respondents have heard about global warming, sea-level rising, the Gulf of Mexico oil spill, the coral reef bleaching crisis, and Japan whaling fisheries. However, less than 20% of the respondents are aware of Taiwanese domestic marine policies, such as the Ocean White Paper. On resources conservation, 74.7% of the respondents support the bluefin tuna catches regulations and 76.6% agree that the shark fin fisheries will impact shark resources. Education and age are the major affecting variables for resource conservation and knowledge. Higher education and age 40–49 are most supportive of conservation measures. For marine recreational activities, 42.2% of the respondents can swim, and 44.2% of the respondents had not visited the beach in the previous year. The results suggest that the government could establish a specialized agency to strengthen its marine policy and take more actions to protect ocean environment and conserve marine resources. To encourage more Taiwanese to participate in ocean recreational activities, the government could build a safe facility for marine recreation, cooperate with the private sectors in education, and provide outreach to raise public awareness of the oceans. 相似文献
95.
王喜宏 《内蒙古公路与运输》2010,(5):61-62
农村汽车客运站是农村道路运输的重要公益性基础设施,是整个道路运输市场体系的重要组成部分。农村汽车客运站的建设对改善农民群众出行条件、提升乡镇公共服务水平、推动农村经济发展、服务“三农”、建设社会主义新农村具有重要意义。文章针对当前农村汽车客运站建设及运营管理存在的问题,提出整改思路。 相似文献
96.
城市轨道交通大客流控制是保证运行秩序和乘客安全的客运组织管控手段,目前由运营人员根据经验进行大客流辨识和客流控制决策的模式具有一定的主观性和滞后性。基于自动售检票系统(AFC)历史客票数据,分析车站大客流的发展规律,基于实时客票数据和列车运行实绩,获取进站客流的实时聚集数量及其空间分布情况,提出的辅助决策方法能够基于客票数据确定车站客流控制等级和控制时机,具备较好的精确性和前瞻性。 相似文献
97.
装车处所固定式灭火系统直接影响船舶航行安全。文章介绍了滚装客船装车处所固定式灭火系统的配备、各种常见固定式灭火系统的性能,提出了固定式灭火系统的检查要点及保证这些船舶消防设备正确操作和时刻处于良好使用状态的要求。 相似文献
98.
99.
本船作为车客渡船具有多用途、多任务的特点,适应性强.该文从型线设计、总体布置、稳性计算等方面,概要介绍了本船的一些设计特点. 相似文献
100.