| 基于直方图优选的车速分布模型研究 |
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| 引用本文： | 曹瑾鑫,肖崇紫,武钧.基于直方图优选的车速分布模型研究[J].内蒙古大学学报(自然科学版),2012,43(1):89-95. |
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| 作者姓名： | 曹瑾鑫 肖崇紫 武钧 |
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| 作者单位： | 1. 内蒙古大学交通学院,呼和浩特,010070
2. 内蒙古大学交通学院,呼和浩特010070;北京交通大学交通运输学院,北京100044 |
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| 基金项目： | 国家自然科学基金，内蒙古自治区自然科学基金，内蒙古自治区高等学校科学研究计划项目，内蒙古大学高层次人才引进启动基金 |
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| 摘 要： | 通过对国内外已有的研究分析,发现车速的分布规律变化不一,很难用单一的某一种分布模型进行拟合.因此,通过对呼和浩特市昭乌达路的速度数据采集,利用直方图优选的方法对速度分布直方图进行改进,并利用正态分布、威布尔分布、伽玛分布和Logistic分布模型对改进后的直方图进行了拟合分析.通过对拟合分析得出的相关系数的比较,给出了这四种分布在拟合速度分布时的适用范围.
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| 关 键 词： | 速度分布 直方图 相关系数 拟合函数 |
An Analysis of Curve Fitting Functions for vehick Speed Distribution Based on Histogram Improving Method |
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| CAO Jin-xin
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XIAO Chong-zi
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WU Jun.An Analysis of Curve Fitting Functions for vehick Speed Distribution Based on Histogram Improving Method[J].Acta Scientiarum Naturalium Universitatis Neimongol,2012,43(1):89-95. |
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| Authors: | CAO Jin-xin XIAO Chong-zi WU Jun |
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| Institution: | 1(1.Faculty of Transportation,Inner Mongolia University,Hohhot 010070,China; 2.School of Traffic and Transportation,Beijing Jiaotong University,Beijing 100044,China) |
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| Abstract: | According to the findings of domestic and foreign studies,it is found that the range of vehicle speed distribution is enormous,and it’s very difficult to use a single model to describe the speed distribution.So,the related data was collected in the Zhaowuda Road of Hohhot by the project team,then a histogram improving method is proposed to deal with bar charts of speed distributing and four kinds of curve fitting functions(Normal,Weibull,Gamma,Logistic)are adopted to describe the distribution.After the comparison of the correlation coefficient,the applicability of each function is presented. |
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| Keywords: | speed distribution histogram correlation coefficient curve fitting function |
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