互通式立交变速车道及分流鼻处设计关键点浅析

该文指出互通式立交设计往往局限于满足规范要求就是满足了安全要求,设计者经常忽略运行过程中驾驶人员的心理、生理方面的感受以及车辆的行驶特性等。往往是满足规范的单个指标在某些场合组合在一起时,可能出现不安全因素。变速车道及分流鼻处的设计尤为如此,因此,在立交设计中应给予足够的重视。     

地下工程开挖与支护的非线性分析

运用耗散结构和熵变论分析了地下工程开挖后围岩应力变化和变形的非线性过程,并进一步用熵增加解释支护对围岩稳定的作用机理。岩体在变形的过程中出现了能量释放和熵减小,如果负熵大于围岩系统的熵,系统的熵增加为负,围岩系统从无序发展到有序,直到失稳。为了维护围岩的稳定性,在围岩系统中加入锚杆、喷浆等支护作为高熵物以提高系统的熵,能减小开挖前后应变能差异。     

汽车行业过程变更平台化管理策略

进入21世纪以后,中国汽车销量节节猛升,随着汽车需求量日益增大,传统式单产品单工厂"一对一"生产模式已无法满足生产需求。为了解决工厂的"一对N"的生产模式,论文应用IT化集中变更系统,确保所有变更集中评审可阶梯式灵活实施,解决过程变更多个工厂同步生产管理困难,改造方案标准化推广实施,保证工艺标准的统一和规范,通过过程变更系统的应用和新的体系建立,实现了过程变更全生命周期的管理,成为行业过程变更平台化管理的领先者。     

Fast Mode Decision Method Based on Historical Information for H. 264/AVC

Mode decision based on rate-distortion optimization algorithm brings high compression efficiency to H.264/AVC. However, heavy computation load is also added to the encoder at the same time. In order to reduce the computation burden of mode decision, this paper presented a fast mode decision method based on mode information of the previously coded frame. Moreover, all coding modes were activated when scene change occurs and a scheme to detect scene change was proposed. The simulation results show that compared to the original encoder, the proposed method achieves a reduction of over 38% encoding time and keeps almost the same PSNR and bitrate for a wide range of quantization parameter.     

复合相变调温剂的制备方法及其性能表征

针对固-液相变材料在高温下容易泄漏的问题,先将相变材料制成相变微胶囊,然后用环氧树脂包裹相变微胶囊得到复合相变调温剂.试验发现,复合相变调温剂粒径均匀、吸水率低,且具有较高强度,可等量替换粗集料.复合相变材料相变焓值较高,相变温度域较宽,储存稳定性良好,适用于道路工程.     

密立根油滴实验中平衡电压和下落时间关系的研究

通过分析平衡电压和下落时间的隐函数关系表达式,推导出了两者之间的直接函数表达式和变化关系。同时用数值模拟和实验验证的方法,得到这样的结论：随着下落时间的逐渐增长,平衡电压是逐渐变小的,而且变化率是越来越小。实验过程中油滴质量的减小很好地解释了两者之间的变化关系。剔除掉由于电量减小造成的不合理数据可以提高实验的准确度。     

底盘测功机加载响应性能研究

对我国在用车工况法尾气排放测试用底盘测功机加载响应性能的测试方法和技术要求进行了研究。指出我国有关文献忽略了影响底盘测功机加载响应性能的重要因素—平均稳定时间所带来的问题,以及美国BAR97测试方法对我国实施的瞬态和简易瞬态工况法存在的不适应问题,根据我国瞬态工况法和简易瞬态工况法的特点,提出新的加载响应性能测试方法,并对某底盘测功机加载响应性能进行了测试和分析。     

浅谈交通组织在城市道路设计中的应用

本文通过对道路红线、绿线的搭配使用 ,兼顾交通功能和景观功能的前提下 ,在道路平面设计阶段纳入交通组织设计 ,并通过绿化和车道板块分割实现功能划分 ,以体现交通组织在道路设计中的重要意义 ,旨在对交通组织在道路中的实际应用进行探讨和实践。     

Adoption intentions for micro-mobility – Insights from electric scooter sharing in Taiwan

Micro-mobility may alleviate a number of challenges facing big cities today, and offer a pathway toward more sustainable urban transportation. This research investigates what factors influence university students’ intention to use an electric scooter sharing service. A theoretical framework adapting the theory of planned behaviour was used. Survey responses from 471 university students in Taiwan were collected. Data were analysed using factor analysis and structural equation modelling. Respondents with different levels of usage intention and in different stages of behavioural change display distinct reasoning patterns. Lack of perceived compatibility with personal values, mobility needs and life-style particularly drives students with low usage intention and pre-contemplators, who show signs of “green hypocrisy”. Awareness-knowledge about the sharing system and environmental values influence the formation of usage intention in indirect ways. This study is intended to be a reference for subsequent conceptual and empirical work on e-scooter sharing in particular, and shared mobility with other types of powered two-wheelers.     

Forecasting the impacts of climate change on inland waterways

Inland waterways are vulnerable to climate change as river navigation depends on water levels. Droughts can severely disrupt inland navigation services by reducing water levels either to completely non-navigable ones or to levels that oblige operators to reduce vessel load. We analyse the impacts of droughts induced by climate change using projections of river discharge data provided by eleven different climate model runs. We consider location specific characteristics by focusing the analysis on four specific locations of the Rhine and the Danube where a substantial part of the total freight activity in the European Union (EU) takes place. For the majority of the cases and scenarios considered, a decrease of the number of low water level days is projected, leading to fewer drought related disruptions in the operation of the inland waterway transport system. Although the uncertainties from the climate projections should not be neglected, the navigation sector could benefit from global warming which means that European inland waterways might be one of the few sectors where climate change can have negligible, or even positive, impact. The average economic benefit, for the cases considered, from the decrease of low water levels by the end of the century is projected to be almost €8million annually.