In order to restrict non-yielding maneuvers of left-turning vehicles,an optimal design of left-lane line extensions is proposed to solve the problem.A field observation was conducted to collect a data set of left-turn...In order to restrict non-yielding maneuvers of left-turning vehicles,an optimal design of left-lane line extensions is proposed to solve the problem.A field observation was conducted to collect a data set of left-turning vehicles at the beginning of a green phase at two similar intersections(one with a permitted phase and the other with a protected phase).The comparative analysis shows no significant difference in the speed distribution using either a permitted phase or a protected phase,but it reveals that a permitted phase can lead to a larger acceleration when the left-turn vehicles pass through the conflict points.Those indicate the existence of non-yielding maneuvers of left-turn vehicles at signalized intersections with a permitted phase.Optimal designed left-lane line extensions contain two types of segments,circular curves and transition curves,and they are only related to four geometry parameters of an intersection.The proposed method is easy to use and it can offer reference for intersection channelization and traffic organization.展开更多
The tilting-train is very attractive to the railroad users in the world due to the advantage of high speed in curved track using pre-existing infrastructure of railway.Tilting-train has a unique allowable speed and me...The tilting-train is very attractive to the railroad users in the world due to the advantage of high speed in curved track using pre-existing infrastructure of railway.Tilting-train has a unique allowable speed and mechanism especially in curved track.In this work,when tilting-train is operated with the allowable speed,the behavior of roadbed is evaluated by examining its settlement and bearing capacity.Additionally,the stability of roadbed is estimated as the roadbed is in the condition of soft soil influenced by the weather effects and cyclic train loading.Numerical results show that the roadbed settlement satisfies the allowable settlement when the elastic moduli of upper roadbed and in-situ soil are greater than 3800 and 4600 kN/m2 for rail joint and 2300 and 3300 kN/m2 for continuous welded rail(CWR).展开更多
在国家主席习近平和英国首相卡梅伦的见证下,10月21日,中信集团董事长常振明和总部基地全球控股集团(ABP)董事局主席许为平正式签署《总承包商协议》。根据双方签署的合约,中信集团控股子公司中信建设将成为总部基地伦敦皇家阿尔伯特码...在国家主席习近平和英国首相卡梅伦的见证下,10月21日,中信集团董事长常振明和总部基地全球控股集团(ABP)董事局主席许为平正式签署《总承包商协议》。根据双方签署的合约,中信集团控股子公司中信建设将成为总部基地伦敦皇家阿尔伯特码头项目(ABP Royal Albert Dock)总承包商。皇家阿尔伯特码头项目名为"ABP亚洲商务港",位于伦敦唯一的政府特批企业区,定位伦敦第三个金融中心,为伦敦城市重建计划中的旗舰项目。之前,中信建设已与总部基地签署《投资合作协议》。展开更多
基金The National Natural Science Foundation of China(No.51278220)
文摘In order to restrict non-yielding maneuvers of left-turning vehicles,an optimal design of left-lane line extensions is proposed to solve the problem.A field observation was conducted to collect a data set of left-turning vehicles at the beginning of a green phase at two similar intersections(one with a permitted phase and the other with a protected phase).The comparative analysis shows no significant difference in the speed distribution using either a permitted phase or a protected phase,but it reveals that a permitted phase can lead to a larger acceleration when the left-turn vehicles pass through the conflict points.Those indicate the existence of non-yielding maneuvers of left-turn vehicles at signalized intersections with a permitted phase.Optimal designed left-lane line extensions contain two types of segments,circular curves and transition curves,and they are only related to four geometry parameters of an intersection.The proposed method is easy to use and it can offer reference for intersection channelization and traffic organization.
基金supported by the 2014 Inje University research grant
文摘The tilting-train is very attractive to the railroad users in the world due to the advantage of high speed in curved track using pre-existing infrastructure of railway.Tilting-train has a unique allowable speed and mechanism especially in curved track.In this work,when tilting-train is operated with the allowable speed,the behavior of roadbed is evaluated by examining its settlement and bearing capacity.Additionally,the stability of roadbed is estimated as the roadbed is in the condition of soft soil influenced by the weather effects and cyclic train loading.Numerical results show that the roadbed settlement satisfies the allowable settlement when the elastic moduli of upper roadbed and in-situ soil are greater than 3800 and 4600 kN/m2 for rail joint and 2300 and 3300 kN/m2 for continuous welded rail(CWR).
文摘在国家主席习近平和英国首相卡梅伦的见证下,10月21日,中信集团董事长常振明和总部基地全球控股集团(ABP)董事局主席许为平正式签署《总承包商协议》。根据双方签署的合约,中信集团控股子公司中信建设将成为总部基地伦敦皇家阿尔伯特码头项目(ABP Royal Albert Dock)总承包商。皇家阿尔伯特码头项目名为"ABP亚洲商务港",位于伦敦唯一的政府特批企业区,定位伦敦第三个金融中心,为伦敦城市重建计划中的旗舰项目。之前,中信建设已与总部基地签署《投资合作协议》。
