In the field of traffic flow studies, compulsive lane-changing refers to lane-changing （LC） behaviors due to traffic rules or bad road conditions, while free LC happens when drivers change lanes to drive on a faster...In the field of traffic flow studies, compulsive lane-changing refers to lane-changing （LC） behaviors due to traffic rules or bad road conditions, while free LC happens when drivers change lanes to drive on a faster or less crowded lane. LC studies based on differential equation models accurately reveal LC influence on traffic environment. This paper presents a second-order partial differential equation （PDE） model that simulates both compulsive LC behavior and free LC behavior, with lane-changing source terms in the continuity equation and a lane-changing viscosity term in the momentum equation. A specific form of this model focusing on a typical compulsive LC behavior, the ＇off-ramp problem＇, is derived. Numerical simulations are given in several cases, which are consistent with real traffic phenomenon.展开更多
以某8600标准车位(Car Equivalent Unit,CEU)大型汽车卡车运输船(Pure Car and Truck Carrier,PCTC)滚装系统为研究对象,从折叠式艉门、活动坡道/活动坡道盖板、活动甲板的制造与安装要求等方面对大型PCTC滚装系统进行阐述,并提出大型P...以某8600标准车位(Car Equivalent Unit,CEU)大型汽车卡车运输船(Pure Car and Truck Carrier,PCTC)滚装系统为研究对象,从折叠式艉门、活动坡道/活动坡道盖板、活动甲板的制造与安装要求等方面对大型PCTC滚装系统进行阐述,并提出大型PCTC滚装系统建造管理措施,为同船型滚装系统建造提供思路和方法。展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.11002035 and 11372147)
文摘In the field of traffic flow studies, compulsive lane-changing refers to lane-changing （LC） behaviors due to traffic rules or bad road conditions, while free LC happens when drivers change lanes to drive on a faster or less crowded lane. LC studies based on differential equation models accurately reveal LC influence on traffic environment. This paper presents a second-order partial differential equation （PDE） model that simulates both compulsive LC behavior and free LC behavior, with lane-changing source terms in the continuity equation and a lane-changing viscosity term in the momentum equation. A specific form of this model focusing on a typical compulsive LC behavior, the ＇off-ramp problem＇, is derived. Numerical simulations are given in several cases, which are consistent with real traffic phenomenon.
文摘以某8600标准车位(Car Equivalent Unit,CEU)大型汽车卡车运输船(Pure Car and Truck Carrier,PCTC)滚装系统为研究对象,从折叠式艉门、活动坡道/活动坡道盖板、活动甲板的制造与安装要求等方面对大型PCTC滚装系统进行阐述,并提出大型PCTC滚装系统建造管理措施,为同船型滚装系统建造提供思路和方法。
