The relationships between e-shopping and store shopping in the shopping process of search goods

Internet facilitates hybrid shopping processes by enabling consumers to acquire information, experience product, and conduct transaction using different media (e.g., internet, store, and catalog) at different locations at different times. Although several studies have explored how internet transactions and store sales influence each other, few investigated transportation implications of the hybrid shopping process of single products. Using 540 internet users in the Minneapolis-St. Paul metropolitan area, USA, this study decomposed their shopping processes of a group of search goods (books, CDs, VCDs, videotapes, and album) to understand the relationships of e-shopping and store shopping. We found the media for product awareness, information search, and product trial are important predictors of transaction medium; and the awareness medium is the most important. Further, 17% of store buyers used internet for information search and/or product trial, and about 10% of internet buyers made trips to store to acquire information and/or experience product. The findings carry implications for marketing strategies and travel demand analysis.     

基于性能的简化防波堤地震稳定性分析

我国抗震设计规范与国外主流抗震设计规范在设计理念与设计路径等方面存在不同。本文依据PIANC抗震设计规范,借助Makdisi-Seed简化位移计算方法评估了某斜坡式防波堤在设计地震作用下的稳定性及其地震性能,为海外工程设计提供参考。     

堆取料机配重的安装与维护

堆取料机在运行一定年限后,俯仰配重往往不再平衡,需进行调整.介绍了堆取料机配重的作用、形式及其安装.以某火电厂为例,详细介绍了堆取料机配重的维护调整.取得较好效果.     

河南的孤立群落还是丝绸之路上的一个贸易网络?——宋元时期来华犹太人再考

公元10-14世纪亦即中国的宋元时期,东西贸易交流愈加繁盛。该时期大多数的贸易活动都是在商业市镇之间进行的。犹太人在当时也利用了他们分布于欧亚大陆上的流散社团从事商业活动。正是在这样的历史背景下,一些犹太人从波斯海岸辗转印度最终将他们的贸易网点扩展到了中国,并在中国的沿海和内地建立了数个商站,形成了一个扎根于中国的犹太人贸易网络。     

党组织作用在公交优秀中彰显

南京市城建集团党委2007年开展了"四杯"竞赛和"两创一争当"活动.我总公司以"旗帜杯"活动为主线,推动党组织建设有朝气;以"同心杯"活动为重点,推动企业班子建设有锐气;以"清廉杯"活动为抓手,推动企业上下有正气;以"和谐杯"活动为基础,推动企业党群活动有人气.     

北京市房山区旅游客运线路规划研究

由于旅游主管部门与交通主管部门管理脱离,郊区现有公交主要是联系新城与各乡镇的城乡公交,较少考虑旅游客运的出行特征.本文从游客出行需求角度出发,以游客旅游出行全过程为主线,系统地研究郊区旅游客运线路的运营与管理.依据游客的出行需求,提出旅游客运线路规划和旅游线路换乘设计原则.针对旅游旺季高峰时段,提出线路的运营组织方案和车辆调度方案.从旅游车辆运力配置、票价制定、明确主管部门等方面提出改进建议.     

从港口的代际功能看港口功能的发展

从港口的代际划分及其功能,介绍了各代港口的主要内涵特征。结合系统的观点,为配合现代物流的发展,提出未来港口的功能定位应予关注的几点做法。     

Cluster-based correlation of severe driving events with time and location

In this article, a systematic strategy is proposed to identify severe driving events occurrence correlation with time and location. The proposed approach, which is constructed based on batch clustering and real-time clustering techniques, incorporates historical and real-time data to predict the time and location of severe driving events. Batch clustering is implemented with the combination of subtractive clustering and fuzzy c-means clustering to generate clusters representing the initial correlation patterns. Real-time clustering is then developed to create and update real-time correlation patterns on the foundation of the batch clustering using the evolving Gustafson–Kessel like (eGKL) algorithm. In both clustering processes, the correlation of the events within time domain is identified first, and then two different levels of accurate correlations are conducted for the location domain. Real-time data of operating vehicles each equipped with a data acquisition and wireless communication platform are used to validate the proposed strategy. Batch clustering results reveal the severe braking events distribution and concentration at daytime and nighttime. Real-time clustering provides and updates the variation of the correlations/intercorrelation of different regions. Drivers can be notified of the potential severe driving locations through maps showing the driving routes. Through the variation of the correlations, drivers can recognize the events occurrence at different times and locations. The generated time series can be potentially used to develop spatial-time models for regions to model and forecast the events occurrence.     

CFG-D系列轨道电路分路残压定压测试器

针对目前采用分路线测试残压产生压力小，易造成测试误差的问题，研制开发了一种新型轨道电路分路残压定压测试器。从结构组成、测试效果、技术指标几方面，对该测试器进行具体介绍。     

苏通大桥辅桥主墩单壁吊箱设计要点

苏通大桥辅桥主墩承台平面尺寸大,承台厚,桩基为梅花形布置,底板呈凹凸状,形状复杂,根据上述特点,并结合承台防撞结构设计的要求,吊箱设计为单壁结构。主要介绍该吊箱的各结构设计要点和结构计算情况。