LTY8沥青混凝土摊铺机摊铺二灰碎石混合料的合理使用

从原材料控制、拌和、运输、摊铺、碾压等方面简要介绍了ＬＴＹ８型沥青混凝土摊铺机摊铺二灰碎石混合料的合理使用，重点介绍了该摊铺机在提高摊铺厚度方面的合理使用。     

沥青路面热补养护新技术应用探讨

阐述了热补板工作原理，结构特点，技术规格，使用范围，工作程序，并通过与沥青路面传统的养护方法进行对比，总结出了热补板性能的优缺点，认为沥青路面热补养护是一项值得推广的公路养护新技术。     

论公路建设中的土地复垦问题

从可持续发展的战略角度出发，分析和阐述了公路建设中破坏土地的形式和原因，提出了土地复垦在公路建设中运用的思想，对公路建设和土地保护具有一定的指导意义。     

奥拓轿车的空调系统

奥拓轿车是近几年国内出现的新车型，其空调系统设计合理，性能可靠，调温能力强。它的空调系统主要由压缩机，冷凝器，贮液干燥器，膨胀阀，蒸发器等组成，空调系统的控制元件主要有：制冷开关，彭风开关，放大器，高压开关，恒温器和加速断裂开关等，对各部件的结构和功用进行了详细的介绍。     

兰州新区精细化工园区铁路专用线接轨方案

兰州新区精细化工园区位于兰州新区西北部,是一座具有国际先进水平的绿色化工园区。为满足兰州新区精细化工园区日益增长的货运需求,分析兰州新区精细化工园区现状及货运量预测情况,确定西小川站为铁路专用线接轨车站,设置装卸区线路布置方案,从线路长度及线路条件、拆迁及征地、施工难度和预估投资4个方面对铁路专用线接轨方案进行比选,最终采用方案Ⅱ-1。兰州新区精细化工园区铁路专用线建成后,可以吸引企业入驻园区,打造国际一流的综合性绿色化工产业基地。     

城市新区客运交通需求预测方法研究

城市客运交通需求预测是城市道路交通规划的基础。城市新区因缺乏现状交通调查资料、开发建设速度较快及其交通出行特征，传统客运交通需求预测方法已不再适用。在吸取国内城市道路交通规划实践经验的基础上，针对城市新区背景下道路交通规划的特点及传统客运交通需求预测方法的不足，以城市新区人口和土地利用规划为基础，提出一种面向城市新区的客运交通需求预测方法，可为我国城市新区交通预测提供借鉴。     

Explaining obesity with urban form: a cautionary tale

In recent years, there has been a dramatic increase in studies exploring associations between the built environment and obesity. Many studies have found that built environment characteristics, such as high-density land developments, mixed-land uses, and connected street networks, are associated with lower rates of obesity. However, depending on the research field and the researcher, how one specifies the experimental model and how sociodemographic characteristics of the population are defined and included in the model has led to different policy conclusions and implications. This is not a surprising observation; however, it is one that does seem to have been lost in current discussions. This article highlights several data-processing, model-specification, and model-estimation factors that should be comprehensively considered in studies of the built environment and obesity. Empirical results based on data from Atlanta, GA, USA, illustrate that the association between the built environment and obesity is sensitive to how age, income, and educational attainment are included in the model. Also, a detailed examination of land-use-mix measures shows that it is difficult to create this measure and that results are sensitive to the treatment of missing values. Models that distinguish between overweight and obese individuals are shown to provide richer insights into the associations among obesity, built environment, and sociodemographic characteristics for the Atlanta area. The article concludes by offering modeling recommendations for future studies.

Disentangling the influence of neighborhood type and self-selection on driving behavior: an application of sample selection model

The causality issue has become one of the key questions in the debate over the relationships between the built environment and travel behavior. Although previous studies have tested statistical and/or practical significance of the built environment on travel behavior, few have quantified the relative roles of the built environment and residential self-selection in influencing travel behavior. Using 1,479 residents living in four traditional and four suburban neighborhoods in Northern California, this study explores the causal effect of neighborhood type on driving behavior and its relative contribution to the total influence of neighborhood type. Specifically, this study applied Heckman’s sample selection model to separate the effect of the built environment itself and the effect of self-selection. The results showed that, on average, the effect of neighborhood type itself on driving distance was 25.8 miles per week, which accounted for more than three quarters of the total influence of neighborhood type and 16% of individuals’ overall vehicle miles driven. These results suggest that the effect of the built environment on driving behavior outweighs that of self-selection. This paper also discussed the advantages and weaknesses of applying the Heckman’s model to address the self-selection issue.

公交场站规划中相关政策的研究

通过对昆明、南京、上海、天津四大城市公交场站开发、建设及管理模式的调研,对现有的城市公交场站的开发、建设模式有了较为深入的研究。通过类别分析,对成都市公交场站的发展模式进行了定位,预见其未来发展趋势。并结合成都市城市发展,对成都市公交场站规划与管理提出了具体的建议。