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1.
首先介绍了中国中小城市的交通现状,并将国外国内一些可持续发展的交通典范作了阐述。特别重点指出自行车交通作为绿色环保交通工具应大力提倡。结合我国中小城市的现状,提出在中小城市发展自行车交通的相关措施,切实给予自行车交通一些优惠政策。最后呼吁人们尽量多的选择自行车交通出行。  相似文献   

2.
具有普适意义的新兴中小城市现代市民精神主要包括社区意识、公共意识、公民意识和文化意识。新兴中小城市建设的重大实践课题,是循着城市先进文化的主流方向默默耕耘,把普适性的市民精神灌输给千百万的新市民。  相似文献   

3.
针对公共自行车系统运营中的借车难、还车难等问题,提出一种公共自行车分区动态调度方法.通过计算机仿真模拟站点间自行车调度,分析不合理、不及时等因素对调度产生的影响.以调度成本最小、转运量最大为目标,建立城市公共自行车分区调度模型,基于改进蚁群算法求解该模型最优调度路径.以丹阳市公共自行车站点数据为例,对模型进行验证,结果表明该算法可以求解得出最优调度回路,且准确性高、求解效率高.  相似文献   

4.
本文以中小城市融资为出发点,探析我国中小城市经营建设融资现状和存在的问题,并在此基础上,探究我国中小城市经营融资发展之路.  相似文献   

5.
充分认识城市自行车交通的重要性每年9月22日为世界无车日,世界各国将倡导城市无车活动。2012年是中国第五次配合世界无车日打造中国城市无车日活动,主题为:绿色交通,城市未来。2012年9月5日,住房城乡建设部、国家发展改革委、财政部三部委发布《关于加强城市步行和自行车交通系统建设的指导意见》(建城[2012]133号),其制定的发展目标:大城市、特大城市发展步行和自行车交通,重点是解决中短距离出行和与公共交通的接驳换乘;中小城市要将步行和自行车交通作为主要交通方式予以重点发展。  相似文献   

6.
城市公共自行车租赁点配车量优化模型研究?   总被引:2,自引:0,他引:2  
发展公共自行车日益成为许多城市低碳交通规划的重要组成部分,公共自行车租赁点布局以及配车量分配是充分发挥公共自行车作用的关键.为缓解公共自行车系统实际运营中的车辆供需矛盾,综合考虑公共自行车系统的运营成本和用车者等待时间成本,平衡一天内高峰期和非高峰期的需求变化,在预测公共自行车需求的基础上,应用排队论方法,构建了公共自行车租赁点配车量优化模型;并应用于北京市的部分公共自行车租赁点,验证了模型的合理性和可行性.  相似文献   

7.
如何管理仓库中的货物、设备、人员及作业流程,将直接影响到物流服务的成本,效率和作业的准确性,因此科学地进行仓储管理是中小城市物流企业发展的基础.本文针对目前中小城市物流企业仓储管理存在的问题,提出了中小城市仓储管理发展的最新模式.  相似文献   

8.
中小城市社区发展滞后,已成为目前我国社区发展中的关键问题.关注泰安这样的中小城市的社区发展,具有极为重要的理论价值和实践意义.应以我国十多年来社区建设的背景为镜鉴,加强理论研究,充分体现地方特色,推进中小城市社区发展.  相似文献   

9.
中小城市交通发展的重点   总被引:1,自引:0,他引:1  
在优先发展公共交通思想的指导下,结合中小城市特征,以驻马店市为例,对中小城市交通特征进行了分析,提出改善策略,进而指明中小城市交通发展的重点.  相似文献   

10.
在对秦巴山区中小城市园林植物群落树种调查的基础上,统计了常用城市绿化树种资源、数量、各树种应用频率及各类型植物群落的加权平均数等指标,对秦巴山区中小城市绿化树种资源利用现状和影响因子进行了分析,提出了山区中小城市绿化应重视生物多样性水平建设等发展思路和对策.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

15.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

16.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

17.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

18.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

19.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

20.
<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with  相似文献   

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