基于熵的油耗率相对增量理论模型的建立及分析(王青; 雷丽)

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基于熵的油耗率相对增量理论模型的建立及分析

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,H[4z:C'b"k8qwHo0【作者】王青; 雷丽 【作者单位】山东大学

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&xF&` Q4M6?+x0【论文摘要】 本研究从高架路实测数据拟合得到的双曲型速度-密度关系式出发,引入不可逆过程热力学中的熵产率,建立了车流燃油消耗率相对增量的理论模型,得到了平稳状态下交通流速度脉动引起的油耗率相对增量与此时的 CO2相对增量的关系。分析本研究的理论模型, 得出如下结论:(1)在某一速度下,减小速度的脉动量,油耗及交通流密度会随之降低,同时伴随着通行能力的提高。(2)在速度的相对增量一定时,通过降低交通流密度可以增大交通流的平均速度。当速度增幅小于0.98km/h 时,油耗率的降幅相对较大,通行能力提高明显。当速度增幅再加大时,油耗率的降幅趋缓。水利论文4\.o}:eZ}U

#Y Zc2cw&z0【英文论文摘要】 We are allowed to quote the velocity-density relationships and model the percentage of increase in the fuel consumption rate due to velocity fluctuations on the traffic flow with the concept of entropy production rate that is presented in the thermodynamics of irreversible process.And the same percentage of increase in the fuel consumption rate could be obtained as a function of the fluctuations on the CO2 production rate due to the traffic flow.We come to some conclusions after the analysis of our model: (1)When the velocity is determined and the velocity fluctuations are decreased,the fuel consumption as well as the traffic density gets low,but the flux of traffic increases. (2)When the velocity fluctuation rate is set and we increase the average velocity of traffic flow in cities in the scope less than 0.98 km/h via lowering the traffic density,the fuel consumption will be obviously decreased with larger traffic capacity.水利论文7Z8RC w7u'~i

f/e7i%X-B.I0【论文关键词】 交通流; 熵产率; 油耗率; CO2排放率
%q-Fn-Ye!Zcy0【英文论文关键词】 Traffic flow; Entropy production rate; Fuel consumption rate; CO2 production rate水利论文 xe SQBf9L8g!F
【基金】国家自然科学基金项日(10672098);; 山东省自然科学基金项目(Y2007A04)资助

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TAG: 模型 雷丽 王青 增量 油耗
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