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A review of recent theoretical and computational studies on pinned surface nanobubbles

Chinese Physics B 2018年第1期27卷 136-144页

作者：刘亚伟张现仁 State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

The observations of long-lived surface nanobubbles in various experiments have presented a theoretical challenge, as they were supposed to be dissolved in microseconds owing to the high Laplace pressure. However, an increasing number of studies suggest that contact line pinning, together with certain levels of oversaturation, is responsible for the anomalous stability of surface nanobubbles. This mechanism can interpret most characteristics of surface nanobubbles. Here, we summarize recent theoretical and computational work to explain how the surface nanobubbles become stable with contact line pinning. Other related work devoted to understanding the unusual behaviors of pinned surface nanobubbles is also reviewed here.

关键词： surface nanobubble contact line pinning oversaturation lattice density functional theory

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Sensitivity analysis of key input parameters in conditional cell transmission model for oversaturated arterials

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Journal of Central South University 2013年第6期20卷 1772-1780页

作者：王屏 S.L.JONES 杨群 S.GURUPACKIAM Key Laboratory of Road and Traffic Engineering of Ministry of Education(Tongji University) Department of Civil Constructionand Environmental EngineeringUniversity of Alabama

A novel conditional cell transmission model （CCTM） is a potential simulation tool because it accommodates all traffic conditions from light condition to oversaturated condition. To test the performance of the CCTM, a series of experiments for sensitivity analysis were designed and performed for a multilane, two-way, three-signal sample network. Experiment 1 shows that the model is performed in a logical and expected manner with variations in traffic demand with time and direction. Experiment 2 shows when the possibility of the occurrence of a useful gap increases to 60% and 100%, the delays in left rams decrease by 5% and 15%, respectively. In Experiment 3, comparing the possibility of a conditional cell of 0 with 100%, delay of left turn and delay of the entire network were underestimated by 58% and 11%, respectively. Hence, sensitivity analysis demonstrates that by reflecting local drivers＇ behaviors properly, the CCTM provides an accurate representation of traffic flow in simulating oversaturated traffic conditions.

关键词： oversaturation conditional cell transmission model sensitivity analysis delay possibility

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