结合部路网交通流参数关联度分析方法研究

以高速公路与关联城市快速路结合部路网为研究对象,针对结合部路网数据的复杂性和异构性,以灰色关联度为研究基础,针对灰关联度不满足平行性和一致性的问题,对一般关联度运用一阶差分和二阶差分修正的方法进行模型改进,从而建立二阶趋势关联度模型。最后以G2高速公路与北京市结合部路网实际数据为例,验证了改进的二阶趋势关联度模型的有效性,为结合部路网的智能预测和智能交通控制提供基础数据支持。     

浅析市政道路工程若干质量通病的防治措施

本文结合笔者多年的市政道路施工经验,对市政道路工程若干质量问题作了具体的比较与分析,并针对性的提出了防治措施,谨供大家作参考之用。     

Identifying the factors behind fatal and non-fatal road crashes: a case study of Lahore,Pakistan

ABSTRACT

The study identifies the factors behind fatal and non-fatal road crashes in Lahore, Pakistan, by investigating 461 reported cases to Traffic Police Lahore that occurred during January–November 2014. Road crashes are categorized into fatal and non-fatal crashes and, because of the binary nature of the dependent variable, logistic regression is used to identify the factors behind these crashes. As a follow-up, discriminant analysis is employed to classify the factors related to fatal and non-fatal crashes. The logistic regression results reveal that females are at higher risk of fatalities than male drivers. Among vehicle types, rickshaws and cars are more involved in fatal accidents because both are growing at large on roads. Long trucks and trailers are also involved in fatal accidents, mainly because of their huge size and drivers’ risky driving behaviours. It is also noted that risk of fatalities is higher in case where two vehicles bumped each other. Speeding and overloading are the common behaviours resulting in fatal crashes. Better urban transport systems and strict compliance with traffic rules and regulations may improve road safety in Pakistan.     

中国薯类燃料乙醇发展现状与前景

玉米等粮食价格上涨的压力,导致中国开始寻求以非粮食作物为原料的燃料乙醇生产。利用薯类作物特别是木薯生产燃料乙醇在成本效益等经济方面有较大的优势,未来发展潜力巨大。但是目前薯类燃料乙醇产业在中国的发展还处于初级阶段,主要的限制条件是缺乏先进的生产技术和设备和优良的原料品种,另外也受市场容量和市场进入的局限,其发展规模在一段时期内还相对较小。随着中国高速的经济发展和技术进步的推动,薯类作物将会在燃料乙醇生产中发挥重要作用。     

First motorcycle-exclusive lane (Motovia) in Colombia: perceptions of users in Cali, 2012–2013

This study's goal was to evaluate the pilot exclusive lane for motorcycles (Motovía) in Cali, Colombia, from the perception of its users in 2012–2013. A cross-sectional study using roadside surveys plus a qualitative component of individual semi-structured interviews was carried out. Road users' perceptions were investigated before and after implementation of lane dividers (LD) and were compared with other roads in the city. Perceptions were compared using chi-square tests. In the study, 293 motorcyclists, 111 cyclists, and 115 automobile drivers were interviewed. Following the installation of the LD, the majority of motorcyclists and cyclists reported that LD made easier the driving maneuvers and decreased travel time, in contrast to perceptions of automobile drivers (p < 0.001). For most motorcyclists, the Motovia was considered as safe and effective, approving its continuity and replication. Half of automobile drivers and cyclists did not approve the installation of the Motovia due to travel time (drivers) and security issues (cyclists). Motovia is an option to enhance motorcyclists' safety on the road. It must, however, offer clear circulation alternatives for automobile drivers. According to users' perception, it is not safe for bicycles and other human-powered vehicles to share lanes with motorcycles. Further research about vulnerable road users' infrastructure is required.     

丝绸之路经济带物流产业、金融发展对经济提升的驱动作用研究

文章选取丝绸之路经济带9个省市1990～2015年的数据,在梳理物流产业、金融发展与经济提升的作用机理的基础上,运用面板数据模型,研究物流产业、金融发展对经济增长的驱动作用。研究表明：丝绸之路经济带物流产业、金融发展对经济增长均有提升作用,且货运周转量、物流业增加值、金融发展规模和金融发展效率等因素对经济提升的贡献度因地区不同而存在差异,物流产业和金融发展均呈现出非均衡特征。据此提出建设丝绸之路经济带物流基地和金融核心城市以及推动物流和金融的均衡发展,共同驱动丝绸之路经济带经济提升等相关建议。     

两相位交叉口左转车辆抢行的元胞自动机模型

为了解决道路两相位交叉口所存在的左转车辆抢行问题,避免造成严重交通冲突,首先分析了左转车辆抢行行为、路径抢行、以及与直行车辆到达冲突点的时间差相关的概率抢行,在考虑过街行人对抢行行为干扰的情况下,构建了车辆、行人耦合的双路径左转-直行冲突元胞自动机模型,通过计算机仿真分析研究了左转车辆抢行行为对交叉口通行能力的影响。结果表明,无过街行人时,左转车辆抢行使交叉口通行能力下降约5%;有过街行人干扰时,交叉口的通行能力则进一步降低10%～25%。研究结果可为提高道路交叉口服务水平、提高道路通行率和安全性决策提供参考。     

ECA-10路面就地热再生技术研究

由于ECA-10路面低温稳定性相对较差,易开裂。尝试将就地热再生技术应用于ECA-10路面,提出就地热再生的同时掺入部分新料（加厚热再生）和原路面就地热再生（等厚热再生）两种方案,在室内对两种方案配合比设计进行研究。结果表明,两种方案的抗高温性能、抗水损害性能、抗飞散性能等均达到了SMA路面的技术要求,相比之下掺入新料更佳。     

Connecting tourists to musical destinations: The role of musical geographical imagination and aesthetic responses in music tourism

While the value of music in connecting tourists to destinations is recognized, its mechanism remains unclear. This study adopts aesthetic responses to explore how musical geographical imagination influences tourists' place bonding and subsequent behavioral intentions. This explanatory sequential mixed-methods study: 1) elucidates the connotation and effects of musical geographical imagination integrating with aesthetics in tourism research; 2) shows that tourists' aesthetic cognitive and affective responses to musical geographical imagination strengthen place bonding, and buttresses the importance of affective responses in leveraging behavioral intentions; and 3) indicates that tourists’ responses to musical stimuli differ in direct and indirect destination experience contexts, demonstrating that musical stimulus context moderates on associations of imagination with cognitive responses, and affective responses with behaviroal intentions. This study empirically expands the imagination from individual auditory spaces to a destination and advances tourism aesthetics research; it guides using music in tourism sensory marketing and tourism soundscape design.     

公共投资对经济增长作用的滞延性研究——以公路建设为案例

为有效揭示公共投资对经济增长作用的滞延性,本文采用基于面板数据的向量自回归方法,建立三阶滞后PVAR模型,对中国31个省级单位1994～2004年的公路投资建设与经济增长关系进行了实证分析。结果表明,公路投资与经济增长之间的作用具有显著的滞延性;同时我们发现,二者之间的作用机制是复杂的、多重的和多样的,两者间的基本关系是"非对称互动关系"。在对二者滞延性进行深入分析的基础上,本文给出了二者之间的作用机制流程图,并对政府如何更好地进行公共投资决策提出了建议。