【摘 要】
：
为预测双车道公路平曲线段运行车速,评价其线形设计的安全性,以曲率、曲率变化率、转角、纵坡度、车道数、车道宽度、路肩宽度等线形技术指标为参数建立公路三维线形综合指标
论文部分内容阅读
为预测双车道公路平曲线段运行车速,评价其线形设计的安全性,以曲率、曲率变化率、转角、纵坡度、车道数、车道宽度、路肩宽度等线形技术指标为参数建立公路三维线形综合指标;采用断面法现场观测平曲线几何特征点小客车的车速。经试验数据统计分析,得到各观测断面处小客车的运行车速。最后,采用回归分析法建立基于三维线形的双车道公路运行车速预测模型。
In order to predict the running speed of two-lane highway in the curve section and evaluate the safety of the linear design, the highway three-dimensional linear combination is established with the linear technical indexes such as curvature, curvature rate of change, corner, longitudinal gradient, lane number, lane width and shoulder width as parameters Indicators; the use of cross-section method to observe the geometric characteristics of flat curve point passenger car speed. Through the statistical analysis of the test data, the running speed of the passenger car at each observation section is obtained. Finally, regression model is established to predict the running speed of two-lane highway based on three-dimensional line.
其他文献
Based on the theories of conversational analysis proposed by Sacks et al,this paper chooses excerpts of candidates’inter-view from the Chinese recruitment real
This paper analyzing Chinese leader Xi Jinping’s and American leader Obama’s inaugurate speeches, aiming to discov-er the underlying culture patterns(individu
指宾状语句是一种句法结构和语义结构的错配现象，即某一状态形容词虽在结构上占据状语位置，但在语义上却指向宾语。该文在对有关指宾状语句的现有分析模式进行评述之后，从事件语
“A driving instructor can teach people driving without knowing anything about car mechanics. So why should a lan-guage teacher know anything about linguistics?
Based on Tyler&Evans’principled polysemy and from the perspective of cognition, this research interprets the proto-scene of preposition ON and points out that
基于语料库的语言分析方法充分利用计算机能快速准确进行复杂分析的优点，不但可以分析大量原始文本中有关语言运用的海量信息，而且能结合定量分析与功能性描述对语言使用进行多
Recast is the most frequently used error correction technique adopted by teachers in the communicative oriented class-rooms. This article illustrates the reason
传统媒体最怕的就是被说“老”。怎样通过微信让广播的路况播报“潮”味十足,牢牢抓住年轻受众?且看浙江交通之声的探索。
The traditional media is the most afraid to be
从发动机的特性出发,绘制出发动机的相关特性曲面,在特性曲面上绘制出各挡位工作线。提出了一种计算油耗的新方法,找到发动机最优工作线。结合挡位工作线,确定了变速器合理换
为了明确级配碎石柔性基层沥青混凝土路面结构层位功能,就沥青混凝土面层厚度、级配碎石基层厚度和模量3个路面结构参数对级配碎石柔性基层沥青混凝土路面进行非线性力学响应