聚脂纤维沥青混合料性能的试验研究

在沥青混合料中掺加聚脂纤维,通过室内试验对沥青混合料的高温稳定性、低温抗裂性、水稳定性等路用性能进行研究,对试验得出的各项路用性能指标进行有针对性的分析,得出加入聚脂纤维能有效改善沥青混合料的路用性能,但在使用上应根据具体工程的交通条件和气候条件,通过试验进行科学的选择.     

我国证券投资基金羊群行为和正反馈行为的实证研究

首先对羊群行为和正反馈行为基本理论进行了综述,对我国证券投资基金的羊群行为和正反馈行为进行了实证分析,统计检验结果表明:从整体上讲,我国证券投资基金存在显著的羊群行为,且卖出羊群行为明显大于买入羊群行为;在整个样本期间,前期市场中存在着正反馈行为,后期市场中存在着负反馈行为。最后,根据实证结果,分析了证券投资基金交易行为存在的原因,并给出了清除羊群行为和正反馈行为的政策建议。     

白铜在两种海洋优势细菌环境中的腐蚀行为研究

利用间歇式方法培养硫酸盐还原菌和需那弧菌,并采用自腐蚀电位、极化曲线、冷场扫描电镜观察等方法,研究了白铜在海洋优势菌种硫酸盐还原菌和需钠弧菌共同作用下的腐蚀电化学行为。结果表明：海洋微生物的存在加速了白铜的腐蚀进程;硫酸盐还原菌在混合菌种培养基中对白铜的腐蚀起主导作用;硫酸盐还原菌和需钠弧菌共同作用下基体表面团聚现象严重,倾向于发生点蚀;微生物对基体腐蚀影响严重程度依次为：硫酸盐还原菌、混合菌、需钠弧菌、无菌。     

共享单车现金奖励调度策略的用户接受意愿研究

为探讨共享单车用户在不同影响因素下对现金奖励调度策略的接受程度，设定了针对共享单车用户的调查问卷，并在济南市进行了调查，得到519份有效问卷。基于扩展的计划行为理论（Extended Theory of Planned Behavior, ETPB）模型和相关结构方程模型（Structural Equation Model, SEM），设定了社会规范、支付能力、体力、感知服务、感知绿色价值5个构念以及5个相关假定，以测度不同奖励调度情境下共享单车用户对奖励策略的接受程度。结果显示，支付能力和体力对用户接受调度的影响程度最大，其次是社会规范和感知服务，感知绿色价值的影响程度最小。在此基础之上，提出了增大站点密度、实行现金奖励及提高车辆质量等建议，以降低运营成本、提升用户满意度与车辆使用率。     

日常路径选择行为的模拟研究

假设司机只能根据自己的历史经验做出判断，本文据此设计了日常路径选择行为中的四种路径更新规则。应用基于多智能体的模拟环境-SeSAm，在简单网络上对四种规则进行模拟，比较和分析了模拟结果。     

基于智能视频分析的铁路入侵检测技术研究

针对视频监控系统人工监视容易产生疏漏的问题,研究在铁路场景下基于智能视频监控图像序列处理和分析的识别物体入侵行为检测技术,给出铁路入侵物体检测、定位与跟踪的适用算法,实现基于轨迹点行为模型的入侵行为分析与理解。设计和开发了基于OpenCV的铁路入侵检测实验平台,在此平台上实现背景建模、运动检测与跟踪等项功能,初步实现了对入侵行为的识别、分析以及对危险行为的报警。     

桥梁用附加装置的发展和创新

超大跨径桥梁或强风、强震区的大跨径桥梁，其的静力、动力响应对桥梁结构设计往往成为控制因素，运用缓冲器、阻尼器和弹性连接等附加装置能有效地改善大跨径桥梁结构受力。在苏通大桥结构体系研究的一些思路和国内外有关资料的基础上，将十多年来应用的一些装置从性能、特征参数和工程应用理念等方面加以较系统地叙述，希望为我国桥梁在这方面的应用提供一些有益的帮助。     

Rewarding rush-hour avoidance: A study of commuters’ travel behavior

Spitsmijden, peak avoidance in Dutch, is the largest systematic effort to date to study, in the field, the potential of rewards as a policy mean for changing commuter behavior. A 13 week field study was organized in The Netherlands with the purpose of longitudinally investigating the impacts of rewards on commuter behavior. Different levels and types of rewards were applied and behavior was tracked with state-of-the art detection equipment. Based on the collected data, which included also pre and post-test measurements, a mixed discrete choice model was estimated. The results suggest that rewards can be effective tools in changing commuting behavior. Specifically rewards reduce the shares of rush-hour driving, shift driving to off-peak times and increase the shares of public transport, cycling and working from home. Mediating factors include socio-demographic characteristics, scheduling constraints and work time flexibility, habitual behavior, attitudes to commuting alternatives, the availability of travel information and even the weather. The success of this study has encouraged adoption of rewards, as additional policy tools, to alleviate congestion, especially during temporary road closures.     

The impact of road improvements on road safety and related characteristics

This paper presents the historical and cultural background relating to road improvement and road safety characteristics in Kenya, a developing country in East Africa. Some who come from low-developed areas of developing countries often take time to comprehend the modern transportation infrastructure, especially roads, and have difficulty assimilating and customizing the same to their culturally tailored modes.This paper discusses two case studies: one on the socio-economic impact following improvements to a 50-km, high-class, high-traffic-volume road and the other on the monitoring and evaluation of road safety aspects along the Northern Corridor in Kenya also following major road improvements.The road improvements to the Nairobi-Thika Highway (a trunk road) have attracted many investors along the highway corridor. The high-speed road has also brought with it the unfortunate consequence of speeding vehicles colliding with pedestrians crossing the road at undesignated locations.The Northern Corridor, the transportation corridor that links the Great Lakes Countries of the Democratic Republic of Congo, Burundi, Rwanda, and Uganda from the port of Mombasa in Kenya, has had high accident rates for a considerable amount of time. The results of monitoring and evaluation exercises on the Northern Corridor have shown that drivers are the major contributors in causing accidents, with a component ratio of 49.4%; pedestrians are next at 21.7%. Data also shows that 24% of the accidents along the Northern Corridor are fatal, which is of major concern. The study additionally indicated that the majority of road users have not been exposed to education or training on road safety.This paper presents a number of recommendations arising from the road safety study regarding possible improvements in aspects of road safety along the corridor and potential applications of those changes to other roads in general. For example, there are recommendations related to the geometric design of the road, driver training and behavior, vehicle maintenance, and the need to enhance road safety through the utilization of road safety parks where road users can undergo training and drills on road safety aspects.In conclusion, we argue that the rehabilitation of the Northern Corridor from Mombasa on the Kenyan coast to the border with Uganda has led to significant road safety improvement.     

展望燃料电池电动车

本文在职回顾蓄电池电动车的发展简史之后,分析和判断来自各方面的信息,从技术上的可行性、氢原料选择、市场准入、政府政策、电动机及其控制系统等各个角度进行综合考虑,认为最具有发展前景的当属质子交换膜燃料电池电动车。