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Rong (MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu 610031, China) Abstract: In order to compare vehicle dynamic characteristics with different wheel profiles and with high-speed rail of 60 N, the wheel-rail contact algorithm was used to calculate the wheel-rail contact geometry relationship with different conditions, running stability and curving......
) Abstract: An automatic urban road extraction method for high-resolution images was proposed. Firstly, road images were initially segmented by using classic Mean-Shift algorithm, and then regions... to remove those regions mixed in image which had different shapes with road. In order to ensure the independence of each road target candidate, a multidirectional morphological filtering algorithm......
Determination method of road lighting power density based on reaction time HU Ying-kui1, 2, LI Yi2, CHEN Zhong-lin2, ZHANG Qing-wen2 (1. College of Civil Engineering, Chongqing University, Chongqing 400045, China; 2. College of Architecture and Urban Planning, Chongqing University, Chongqing 400045, China) Abstract: When metal halide (MH) lamps and light emitting diodes (LEDs) are used as road lighting......
Limited Company, Dalian 116100, China Received 30 November 2011; accepted 8 March 2012 Abstract: The effect of flow passage length in the die cavity and extrusion wheel velocity on the shape... and the cross-section exhibits a better shape. The extrusion wheel velocity has negligible effects on the bending shape and cross-section of the sheath product when a long flow passage is used. Key words......
theory which was used to analyze the effect of straightening irregularity on vertical wheel-rail force and reduction rate of wheel load, in addition, the effect of vehicle velocity on the maximum reduction rate of wheel load is analyzed by the model. The results indicate that the vertical wheel-rail force has a drastic change when the vehicle passes the high-speed turnout at a velocity of 350 km/h......
J. Cent. South Univ. (2016) 23: 1353-1362 DOI: 10.1007/s11771-016-3187-9 Assessing ability of a wet swale to manage road runoff: A case study in Hefei, China TANG Ning-yuan(唐宁远)1, LI Tian(李田)1, GE... for future wet swale design and management. 2 Methods 2.1 Site description The study site was a wet swale on Luzhou Road, an eight-lane highway in Hefei, Anhui Province, China (Fig. 1(a)). The wet......
量；视相关重构Web-based road 3D model simplification method considering constraintsPU Hao1, 2, LI Wei1, 2, ZHAO Haifeng1, 2, SONG Zhanfeng1, 2(1. School of Civil Engineering, Central South University, Changsha 410075, China;2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China)Abstract:Based on the fact that the road 3D model has massive data and a large number......
stop design for a given traffic volume in developing countries. Key words: mixed traffic flow; bus stop; road capacity; speed; bicycles 1 Introduction A number of alternatives are available when... the stopped bus. The temporary car-bicycle conflict would reduce road capacity and delay vehicle speed. In addition, the car-bus conflict takes place when a bus departs from the stop to the motor......
耗模型 车轮谐波磨耗即车轮半径沿整个圆周呈周期性变化,本文建立2阶和3阶车轮谐波磨耗的物理模型,如图1所示.车轮在非圆化形成过程中,轮对左右两端的车轮总是会或多或少存在一定程度的相位差,图1(a)和图1(b)中的实线和虚线分别表示2阶和3阶车轮谐波磨耗轮对左右两端的车轮相位相差90°的示意图. 图1 车轮谐波磨耗示意图 Fig. 1 Schematic diagram of wheel...响 Fig. 4 Effect of velocity and amplitude on wheel-rail vertical force 图5 速度及相位差对轮轨垂向力的影响 Fig. 5 Effect of velocity and phase difference on wheel-rail vertical force 综合分析图4和图5可知:在中,低速时,不管是速度,幅值,相位差还是......
; 文献标志码:A 文章编号:1672-7207(2010)06-2344-06 Design of holes arrangement and grouting pressure for void road panel ZHAO Jian1, 2, ZOU... pressure for void road were given. These conclusions are proved true by making use of numerical analyses method. These theories are useful for engineering application. Key words: road panel; void......
