汽车维修职业资格的构建

在汽车维修职业资格的分类和构建原则的基础上,具体构建了汽车维修专业技术人员的执业资格和汽车维修技术操作人员职业资格.汽车维修职业资格的构建,有利于优化汽车维修行业的人力资源结构,提高汽车维修行业的服务质量和管理水平,从源头上加强行业管理,规范汽车维修业的市场秩序.     

市政道路复合式路面维修方案探讨

文章以南宁市市政道路复合式路面维修工程为例,探索市政道路复合式路面维修的方案,提出了浅层病害维修、中层病害维修及深层病害维修三种方案,并对反射裂缝的防治进行专门设计,可为类似工程项目提供参考。     

汽车维修技术信息公开实施现状及展望

汽车保有量的不断增加激发了汽车维修行业的发展,汽车维修信息的不对称对汽车维修品质等产生了不利影响。因此,要求汽车生产企业公开维修技术信息是打破售后市场垄断,平衡汽车维修市场的首要开端。在政策及市场的双重推动下,全面推进汽车维修技术信息公开制度实施,为提高信息公开质量,增强维修品质,保障消费者利益,发展健康、健全的汽车售后体系打下坚实的基础。     

桥梁维修加固施工技术研究

文章以崇左大桥维修加固项目为工程背景,介绍了桥梁维修加固的原因、原则,阐述了桥梁维修加固的施工技术,以期为桥梁维修加固技术的实际运用提供借鉴。     

市政道路路面养护维修技术研究

重点针对市政道路预防性养护维修技术,首先概述了预防性养护维修对于市政道路沥青路面的重要性,进而分别从路面性能评价、养护技术方案决策以及常用养护维修技术要点等几个方面,详细论述了市政道路沥青路面养护维修技术,可以为市政道路管养部门开展沥青路面的养护维修提供合理的参考。     

百色市汽车维修市场发展探讨

汽车维修行业作为道路运输行业的重要组成部分,有利于推动社会、经济的发展。文章针对百色市汽车维修市场现状,分析该市汽车维修市场存在问题及原因,探讨了该市维修市场发展对策。     

南友高速公路龙州左江大桥维修加固实践分析

文章结合龙州左江大桥维修加固工程实例,介绍了该桥总体维修加固方案,分别阐述了支座更换与粘贴钢板两种维修加固施工工艺要点,为类似桥梁维修加固提供参考。     

规范汽车维修市场的几点思考

当前，汽车维修行业的普遍特点是维修企业多,精优企业少,维修能力相对过剩,维修水平参差不齐,恶性竞争较为严重,造成了社会整体资源的浪费,造成了服务质量安全第一理念产生偏差，我们必须因势利导,通过扶优汰劣,夯实基础，疏堵结合，强化车辆技术管理工作四大解决方案促进汽车维修市场的有序健康发展。     

浅谈M站的建设

<正>汽车排放污染维修治理站(M站),是依据相关法律承接排放污染超标车辆维修治理业务,符合相应标准规定的汽车维修企业,其维修治理业务的标准由机动车排放检验机构(I站)检验出具公正的数据和结论。汽车检验与维修制     

高速公路机电系统的维修质量管理探索

文章基于高速公路机电系统管理的现状与特点,介绍了机电系统维修体系的基本内容,探讨了系统维修的人员管理、程序管理、机电备份管理及内业资料管理,阐述了维修质量的评估细则,并对维修质量管理系统的发展方向进行了分析。     

Travel intensity in a city with a barrier

An analytical study is made of the determination of the travel intensity at an arbitrary point of a city with a straight line barrier. For a given origin and destination a trip is made by the shortest path not crossing the barrier or the city perimeter. The joint trip end distribution is arbitrary except for a continuity assumption.     

Designing a home-to-work bus service in a metropolitan area

This paper presents a model and an algorithm for the design of a home-to-work bus service in a metropolitan area. This type of service must display an equilibrium between conflicting criteria such as efficiency, effectiveness, and equity. To this end, we introduce a multi-objective model in which, among other aspects, equity is considered by time windows on the arrival time of a bus at a stop. Time windows can have other uses such as, for example, guaranteeing synchronization of the service with other transportation modes. This is one of the guiding principles of the proposed model which is based on concepts that simultaneously tackle several issues at once. Along this line, we propose a cluster routing approach to model both bus stop location and routing in urban road networks where turn restrictions exist. The resulting multi-objective location-routing model is solved by a tabu search algorithm. As an application, we analyze a home-to-work bus service for a large research center located in Rome, Italy. This case study provides a benchmark for the algorithmic results, and shows the practical relevance of the proposed methodology.     

How a fast lane may replace a congestion toll

This paper considers a congested bottleneck. A fast lane reserves a more than proportional share of capacity to a designated group of travelers. Travelers are otherwise identical and other travelers can use the reserved capacity when it would otherwise be idle. The paper shows that such a fast lane is always Pareto improving under Nash equilibrium in arrival times at the bottleneck and inelastic demand. It can replicate the arrival schedule and queueing outcomes of a toll that optimally charges a constant toll during part of the demand peak. Within some bounds, the fast lane scheme is still welfare improving when demand is elastic.     

地震区公路隧道洞口山洪泥石流受灾分析及启示

高烈度地震特重灾区隧道如何抵御泥石流等次生灾害是震区隧道工程设计、施工的重要问题。文章通过对映秀至汶川高速公路隧道洞口在"7.9"山洪泥石流中损害情况进行的实地调查和系统分析,认为"5.12"震后造成的山体松动损伤、明洞回填材料刚度和厚度不足,以及隧道明洞段地基抗冲刷能力不够是隧道洞口受损的主要原因,由此提出了相应的设计思路:强化震后(潜在)灾害评估,建立超预期设计理念;重视隧道明洞回填质量和效果;借鉴桥式基础,预留泥石流途经通道,可以起到防灾减灾和减少国家财产损失的作用。     

近接桩基盾构隧道施工管片力学行为研究

盾构隧道衬砌管片在施工阶段处于复杂的受力状态,易出现局部破损现象。文章以深圳地铁5号线近接桩基时盾构隧道施工为研究背景,通过现场测试对衬砌所承受的轴力和弯矩进行了分析,以此来探究盾构隧道管片的力学特性。研究结果表明:上覆建筑物的全风化花岗岩层中,管片脱出盾尾后桩基荷载将传递给隧道上部土体,最后传递至衬砌管片,管片环受到较大的附加应力作用;管片刚拼装上时试验环内力较小;当管片脱出盾尾时其内力达到最大值;稳定后的管片内力一般相较刚脱出盾尾时稍小。由于岩层破碎且极度发育,透水性好,孔隙水压力变化速度较快,且能较快趋于稳定。     

开启交通强国建设新征程

以习近平新时代中国特色社会主义思想为行动指南,推动交通运输现代化,实现由交通大国向交通强国跃升,是我国建设现代化经济体系的内在要求,是建设现代化强国的战略任务之一。需要从提高服务水平、技术进步、产业升级、交通运输与经济社会融合发展以及制度创新等方面突破跃升,全面提升交通运输供给能力,实现具有更高质量、更有效率、更加公平、更加文明、更可持续和更强支撑带动的现代化交通运输体系。     

浅议盾构过矿山法隧道空推段施工质量控制

盾构在通过矿山法隧道施工过程中,因控制不当会产生一系列的质量问题。文章研究分析了现场施工表现出来的管片错台、隧道渗漏水、管片上浮、管片破损等质量缺陷及其形成原因,并阐述了预防和控制其质量缺陷的相关措施。     

What transportation modeling needs from a GIS: a conceptual framework

Both the geographic information system (GIS) and transportation modeling environments have seen continually developing analytic concepts and techniques. However, these developments have seldom resulted in the integration of GISs and transportation models. This paper explores the potential inherent in merging of these environments through a systematic investigation of the fundamental basis of integration. To do this, the traditional four step transportation modeling process is extended to include input and output steps. We then define functional components for GIS data handling — data management, manipulation, and analysis. The steps of modeling are matched against the list of GIS data handling functions within a matrix‐based framework. GIS functions that enhance a land‐use based urban transportation modeling process are then categorized. Conclusions are drawn and directions for future developments are discussed.