公路岩土区划中的土分类体系与类型分布

为进行中国公路岩土区划,在分析已有的土类型划分方法的基础上,提出服务于岩土区划的土分类体系;基于ArcGIS9.1编制了《中国公路土类型分布图》,据此研究了中国公路土类型的区域分布特征。这项研究可为中国公路岩土区划乃至公路灾害区划、公路自然区划等区划研究提供基础图件,并用于指导公路建设。     

技能大赛视野下中职学校汽车专业核心课程教学改革与实践——以《电控发动机检修》课程为例

长期以来,中职学校汽车专业对于技能比赛存在着重成绩、轻转化的现象,导致只有少部分教师和学生受益,这与技能大赛以赛促学、以赛促教、以赛促改的理念相背.本文以《电控发动机检修》课程为例,阐述了中职学校汽车专业基于技能大赛开展专业核心课程教学改革策略与实践成效,以期为中职学校汽车专业核心课程教学改革提供有益借鉴.     

基于模拟退火算法和图着色的调车机车安排研究

铁路车站作业计划编制过程中，如何编制调机运用计划是调度指挥的关键问题。通过分析运用调机时区集合特点，构造调机运用安排图论模型，再将调机运用问题转化为图的着色问题。应用模拟退火算法通过解图的k—顶点着色问题来安排调车机计划，最后给出算法实例。     

Modeling children’s school travel mode and parental escort decisions

Understanding of the activity-travel patterns of children is becoming increasingly important to various policy makers. Further, there is also a growing recognition that intra-household interactions need to be explicitly accommodated in travel models for realistic forecasts and policy evaluation. In the light of these issues, this paper contributes towards an overall understanding of the school-travel behavior of children and the related interdependencies among the travel patterns of parents and children. An econometric model is formulated to simultaneously determine the choice of mode and the escorting person for children’s travel to and from school. The 2000 San Francisco Bay Area Travel Survey (BATS) data are used in the model estimation process. Empirical results indicate that the characteristics of child like age, gender, and ethnicity, and employment and work flexibility characteristics of the parents have strong impacts on the mode choice decisions. In addition, the impacts of some of these attributes on the choice of mode to school are different from the corresponding impacts on the choice of mode from school. The distance between home and school is found to strongly and negatively impact the choice of walking to and from school, with the impact being stronger for walking to school. Several land-use and built-environment variables were explored, but were found not to be statistically significant predictors.

青岛至兰州高速公路邯郸至涉县段采空区特征及处理技术

结合工程实例,深入阐述高速公路通过的采空区的特征及处理方法,可为采空区处理方案的选择提供一定的参考。     

Congestion and pollution consequences of driving-to-school trips: A case study in Beijing

Parents compete for high-quality education for their children by enrolling them in good schools. However, in a Chinese mega-city like Beijing, three factors jointly lead to the spatial separation between schools and homes: the centralized public goods provision mechanism, the historical dependency in school location, and the constrained supply of housing in downtown. Without an adequate number of school buses, this spatial separation of schools and homes triggers the numerous long-distance driving-to-school trips by private vehicle during workday morning rush hours in Beijing. We use the start and end dates of “school holiday” as exogenous repeated shocks to the aggregate traffic congestion, and employ the two-stage least squares (2SLS) regression approach to examine the congestion and pollution consequences of such driving-to-school trips in Beijing. We find that, all else being equal, workdays during school holidays have a traffic congestion index 20% lower than that of non-school-holiday workdays. Such a sharp reduction in congestion leads to a significant decrease in PM₁₀ concentration. Policymakers should lower such “extra” congestion and environmental costs via optimizing the spatial balance between school supply and demand.     

海淀区道路交通管理规划

在调查、分析北京市海淀区道路交通管理现状及其存在问题的基础上,依据海淀区的社会经济发展、交通等规划资料,分析预测海淀区交通管理的发展趋势,研究海淀区道路交通管理规划的内容,为海淀区道路交通管理规划奠定基础。     

我国工读学校职业化办学方向探索

文中从工读学校发展历程综合分析了目前我国工读学校办学中存在的性质定位危机、生源危机、办学资源危机等问题及其成因,并在此基础上,通过对工读学校职业教育机构的本质属性的分析,提出工读学校走职业化办学道路,以促进工读学校的持续健康发展的策略。     

加强新时期学校党政思想工作的三结合

在教育改革时期,思想政治工作依然有其很重要的作用。它适应教育实践的活动规律,有利于顺利实现教育改革的目标,体现出学校管理层的服务意识。我们要努力探索新时期思想政治工作的新思想、新途径、新方法,做到入学教育与继续教育相结合,课堂教育与课外教育相结合,理论学习与社会实践相结合。     

体育运动缓解灾区学生焦虑与抑郁的研究

了解体育锻炼在促进灾区学生心理健康方面的作用,运用健美操、羌族舞及慢跑3个项目对灾区中学生的焦虑与抑郁心理进行干预实验。结果显示,3个项目的体育锻炼均表现出了良好的心理健康效益,各小组的后测焦虑与抑郁水平均低于前测水平且差异具有显著性,其中羌族舞的干预效果最好。建议:灾区中学应重视学生的心理健康工作,为学生制定科学的运动处方,引导学生经常进行体育锻炼。