Do frequent satisfying trips by public transport impact its intended use in later life?

Transportation - Previous studies have indicated that factors such as the built environment, attitudes and past behaviour can influence travel behaviour. However, the possible effect of travel...     

铁路隧道衬砌施工自动浇筑振捣新技术北大核心CSCD

铁路隧道衬砌质量问题导致的衬砌背后空洞、开裂、掉块等病害会对铁路正常运营造成极大威胁,混凝土的浇筑和振捣是保证隧道衬砌质量的关键。为此,研发了一种隧道衬砌施工自动浇筑振捣新技术,以提升隧道衬砌质量。研究表明,自动旋转布料机逐窗浇筑技术每次换管时间仅为3~4 min,具有结构简单、操作方便、效果优良、安全可靠的特点,既加快了隧道衬砌进度,又保证了隧道衬砌质量;新型插入式振捣技术采用边墙自动提升插入式振捣技术和拱顶自动气动式插入振捣技术,可以有效地提高混凝土振捣效果;拱顶衬砌采用60°斜孔带压反向浇筑,与传统的拱顶浇筑方法相比,堵管次数、浇筑口模板变形次数都明显减少,混凝土浇筑质量得到了显著提升。     

Analyzing voter support for California’s local option sales taxes for transportation

Local and regional governments in the U.S. rely increasingly on voter-approved local option sales taxes (LOSTs) to fund transportation capital investments, maintenance, and operations. LOSTs typically present voters with lists of local transportation projects and programs to be funded by a ¼ to 1 percent sales tax increase. Most research on LOSTs are case studies, which make generalizations about LOSTs difficult. We conducted a comprehensive, multi-jurisdictional analysis of LOST measures in California, the U.S. state with the greatest number of LOST measures. We examined 76 LOST measures put to voters between 1976 and 2016 to assess factors associated with voter support. LOSTs in California are enacted by counties, which we examined in addition to smaller intra-county geographies using both regression models and case studies. We tested several explanatory variables for association with voter support including macroeconomic and political context, planned measure expenditures, voter characteristics, and spatial distribution of proposed projects. We found that funding dedicated to public transit and returned to local jurisdictions predicts support at the county level, and that LOSTs that create new taxes—as opposed to extending or renewing existing taxes—are less popular with voters, all else equal. Our analyses of sub-county geographies revealed that political party affiliation is the strongest predictor of local voter support for LOSTs and that voters living adjacent to funded projects tended to be more supportive of LOSTs.

     

Bridging the gap between evacuations and the sharing economy

Transportation - This paper examines the opportunities for addressing evacuations by leveraging the sharing economy. To support this research, we use a mixed-method approach employing archival...     

新款奔驰A200L加装后视摄像头

<正>加装说明:本文和大家分享一下2018年上市的新款奔驰A200L加装倒车影像后视摄像头(如图1所示)的方法和步骤。此加装适用于奔驰型号为117.1,本文以新款A200L为例进行介绍。加装步骤:此步骤总体来说分为两大类即拆卸和安装,那么我们先来说拆卸部分。1.松开左侧和右侧后座区中的侧面饰件,如图2所示,然后推到一旁。不必拆下后座区中的C柱饰板和座椅靠背。     

奔驰新款E300 coupe加装带Mercedes-Benz字样的发光车门槛

<正>加装说明:本文和大家分享新上市的奔驰新款E300coupe加装带Mercedes-Benz字样的发光车门槛(如图1所示)的方法和步骤。此加装适用于奔驰型号为238.3的车型。加装步骤:此步骤总体来说分为两大类即拆卸和安装,那么我们先来说拆卸部分。1.松开驾驶员侧保险丝和继电器模块。断开蓄电池接地线。拆下驾驶员侧仪表板护盖。     

长江中下游钢丝网石笼护坡生态恢复效果评价

近年来长江中下游航道整治实施一系列钢丝网石笼生态护坡工程,但是缺少对这些护坡建成后生态恢复效果的跟踪调查评价.基于2019年汛前和汛后对6个钢丝网石笼护坡植被和基质的调查,开展植被年内以及年际演替分析,并结合水文数据、基质特征及现场观测情况,筛选4个植被特征因子以及17个环境影响因子做相关性分析.结果表明,经过恢复,护...