沥青混合料搅拌设备导热油炉的选择及使用

针对施工单位在选择使用沥青混合料搅拌设备导热油炉中存在的问题,提出合理选择使用导热油炉。     

基于承载能力的水下承压结构钢质模型制造质量检验要求分析

深水承压结构在研制过程中需要进行大量的缩比模型试验,而缩比模型的制造质量直接关系到试验能否达到预定试验目的,关系到试验结果的正确性。对影响深水承压结构缩比模型试验结果的各种制造质量因素进行分析,提出水下承压结构钢质模型制造质量检验要求;对于有初挠度超差的试验模型,通过理论分析,提出采用有限元方法进行评估计算。通过对4个实例的评估计算分析,证明采用有限元方法进行评估计算的结果可以作为有初挠度超差模型的制造质量验收依据。

     

以功能为导向的舰船建造质量控制方法

长期以来,由于舰船建造工程浩大、过程复杂、工艺繁多,人们对于建造质量如何影响舰船可靠性缺乏系统性的研究。为实现对考虑建造质量影响的舰船可靠性的科学预测和有效控制,从舰船总体功能的角度出发,在现代造船模式背景下,针对舰船建造提出一种以功能为导向的质量控制（FOQC）方法。融合舰船目标功能、质量参数、建造工艺因素,提出舰船建造可靠性预测模型。建立工艺—质量参数及质量参数—特征功能可靠性模型,对预测模型进行量化计算,获得建造质量对舰船可靠性影响的定性与定量分析,并依据分析结果,对关键质量点与关键工艺环节进行控制与优化。以某舰船轴系安装为实例进行分析,验证了方法的可行性与有效性,可为舰船建造质量的定量化检验与评价提供基础性方法的原理指导。     

Improving transportation service quality based on information fusion

How to improve transportation service quality and thus attract more passengers to use public transportation systems is an important concern for city governments around the world. In this study, we propose a novel information fusion model that addresses the dependent relationships among the various criteria for a method of non-additive weighted gap analysis aimed at evaluating and improving the service quality of transport systems. The hybrid model remedies prior shortcomings and should be more applicable to real-world situations. The proposed model is applied to a real case study of Taipei city bus companies to demonstrate its usefulness. The resulting analysis and the managerial applications for improving the bus service quality are also discussed with regards to the current policies of Taipei city.     

国标《道路货物运输服务质量评定》的研究与制定

国标《道路货物运输服务质量评定》的研究和制定对于规范物流市场,实现物流服务标准化具有重要意义。     

施工现场质量管理

施工现场质量管理是施工过程中质量管理的重要组成部分,切实抓好现场质量管理是创造优良工程的关键,施工单位要狠抓质量管理,使工程质量得到全面提高。对施工现场管理的概念、意义和内容进行阐述,从而提出合理规划施工场地,科学管理施工人员,建立文明施工现场的管理模式。     

顶管微型隧道工程质量保证体系分析

顶管微型隧道工程作为一种特殊施工工艺,影响其工程质量的因素很多,如何确保工程质量是当前研究的热点之一。从质量保证体系措施及管理、质量控制与进度控制等方面,讨论了顶管微型隧道施工中质量保证措施,可供同类工程参考。     

赤峰市元宝山区中心城区环境空气质量现状及污染防治对策

通过赤峰市某城区的空气质量的长期检测,分析了近几年大气中主要污染物浓度的变化分析,阐明形成污染的原因,提出污染防治对策。     

Simulating the air quality impacts of traffic calming schemes in a dense urban neighborhood

In this study, the effects of isolated traffic calming measures and area-wide calming schemes on air quality in a dense neighborhood were estimated using a combination of microscopic traffic simulation, emission, and dispersion modeling. Results indicated that traffic calming measures did not have as large an effect on nitrogen dioxide (NO₂) concentrations as the effect observed on nitrogen oxide (NO_x) emissions. Changes in emissions resulted in highly disproportional changes in pollutant levels due to daily meteorological conditions, road geometry and orientation with respect to the wind. Average NO₂ levels increased between 0.1% and 10% with respect to the base-case while changes in NO_x emissions varied between 5% and 160%. Moreover, higher wind speeds decreased NO₂ concentrations on both sides of the roadway. Among the traffic calming measures, speed bumps produced the highest increases in NO₂ levels.     

A novel approach for the modelling of air quality dynamics in underground railway stations

Indoor air quality in subterranean train stations is a concern in many places around the globe. However, due to the specificity of each case, numerous parameters of the problem remain unknown, such as the braking discs particle emission rate, the ventilation rate of the station or the complete particle size distribution of the emitted particles. In this study the problem of modelling PM₁₀ concentration evolution in relation with train traffic is hence addressed with a particle-mass conservation model which parameters are fitted using a genetic algorithm. The parameters of the model allow to reproduce the dynamics and amplitude of four field data sets from the French and Swedish underground contexts and comply with realistic bounds in terms of emissions, deposition and ventilation rate.