全文获取类型
收费全文 | 195篇 |
免费 | 1篇 |
专业分类
公路运输 | 38篇 |
综合类 | 76篇 |
水路运输 | 34篇 |
铁路运输 | 25篇 |
综合运输 | 23篇 |
出版年
2024年 | 1篇 |
2022年 | 4篇 |
2021年 | 13篇 |
2020年 | 6篇 |
2019年 | 3篇 |
2018年 | 3篇 |
2017年 | 4篇 |
2016年 | 9篇 |
2015年 | 10篇 |
2014年 | 14篇 |
2013年 | 16篇 |
2012年 | 11篇 |
2011年 | 13篇 |
2010年 | 16篇 |
2009年 | 8篇 |
2008年 | 11篇 |
2007年 | 14篇 |
2006年 | 12篇 |
2005年 | 10篇 |
2004年 | 5篇 |
2003年 | 3篇 |
2002年 | 3篇 |
2000年 | 3篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1990年 | 1篇 |
排序方式: 共有196条查询结果,搜索用时 62 毫秒
141.
142.
刘翠娟 《辽宁省交通高等专科学校学报》2008,10(1):76-77
本文运用文献资料法和访谈法,对我校实施体育选项课教学进行调查,了解我校体育选项课教学现状及存在的问题,并提出相应的对策,为促进我校体育选项课教学的开展提供借鉴和参考. 相似文献
143.
混合车流合流运行模式研究 总被引:8,自引:0,他引:8
罗霞 《西南交通大学学报》2000,35(1):36-39
采用过程描述法揭示混合车流合流运动过程,得到合流服务未必遵从先到先服务规则;利用合流接受概率理论,得到在相同的可接受间隙时间不同车型接受合流概率不同,从而产生可接受间隙空费;利用计算机模拟,对合流区长度和车道设计对高等级公路服务水平及能力的影响和合流区是整个高等级公路服务水平界岭和突变区给予了理论解释。 相似文献
144.
145.
146.
文章介绍了装备修理所(队),作为中继级维修保障单位,提高其保障能力的几个重要因素,包括保障管理体制改革、保障设施完善和提高人员素质。 相似文献
147.
148.
In order to understand the mode shift behavior of car travelers and relieve traffic congestion, a Stated Preference survey has been conducted in the city of Ji'nan in China to analyze bus choice behavior and the heterogeneity of car travelers. Several discrete choice models, including multinomial logit, mixed logit and latent class model (LCM) are developed based on these survey data. A comparative analysis indicates that the LCM has the highest precision and is more suitable to analyze the heterogeneity of car travelers. The LCM divides car travelers into three classes. Different classes have different sets of influencing factors in the model. Policy recommendations are also proposed for those classes to promote bus shift from car travelers based on the model results. Finally, sensitivity analysis on parking fees and fuel cost is carried out on the LCMs under different bus service levels. Car travelers have different sensitivities to the influencing factors. The conclusions indicate that the LCM can reflect the heterogeneity and preferences of car travelers and can be used to understand how to shift the behavior of car travelers and make more effective traffic policy. 相似文献
149.
The effect of financial constraints on the optimal design of public transport services 总被引:1,自引:0,他引:1
Recent experience with the design of bus services in Santiago, Chile, seems to confirm Jansson's (1980) assertion regarding
observed planned bus frequency and size being too low and too large, respectively. We offer an explanation based upon the
relation between cost coverage, pricing and optimal design variables. We recall that average social cost decreases with patronage,
which generates an optimal monetary fare below the average operators' cost, inducing an optimal subsidy. Then we compare optimal
frequency and bus size—those that minimize total social costs—with those that minimize operators' costs only. We show that
an active constraint on operators' expenses is equivalent to diminish the value of users' time in the optimal design problem.
Inserting this property back in the optimal pricing scheme, we conclude that a self-financial constraint, if active, always
provokes an inferior solution, a smaller frequency and, under some circumstances, larger than optimal buses.
class="Contact">
相似文献
Sergio R. Jara-DíazEmail: |
150.
姜超 《南通航运职业技术学院学报》2007,6(4):108-110
为了减少教师课堂教学质量评定的主观性和随意性,文章应用模糊数学的方法,建立了教师课堂教学质量的模糊综合评判模型。应用于实践,简便易行,客观公正,取得了满意的效果。 相似文献