2012 Vol. 12, No. 3

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Road and railway engineering
Test method of SBS content in modified asphalt
WU Jian-min, ZHANG Xue-lin, CHEN Zhong-da, LIN Jie, ZHANG Hong-liang
Abstract: The performance indexes of three kinds of base asphalts modified with different SBS contents were tested, grey correlation analysis method was used, SBS content was as reference sequence, the performance indexes of modified asphalt, such as penetration, softening point, ductility, elasticity recover...
2012, 12(3): 1-8. doi: 10.19818/j.cnki.1671-1637.2012.03.001
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Deformation rule of loess highway tunnel with two lanes
CHEN Jian-xun, WANG Meng-shu, XUAN Jun-jie, QIAO Xiong
Abstract: Relying on seven single-tunnel double-lane loess tunnels at Wubu to Zizhou section in Shaanxi Province on national main trunk line GZ35 from Qingdao to Yinchuan, the constructing deformations were messured by in-situ test method, and the regression analysis of test results was carried out.Analysis r...
2012, 12(3): 9-18. doi: 10.19818/j.cnki.1671-1637.2012.03.002
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Loading test and finite element analysis on convex steel box section of arch rib
WU Qing-xiong, CHEN Kang-ming, CHEN Bao-chun, NAKAMURA S Z
Abstract: The convex steel box section of arch rib for Yongjiang Bridge in East Outer Ring Road of Ningbo City was taken as object, the 1/4 scale-model loading experiment of arch rib segment was conducted by using the self-balanced loading mode of prestressed steel strand. A finite element model was built bas...
2012, 12(3): 19-27. doi: 10.19818/j.cnki.1671-1637.2012.03.004
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Construction risk analysis of butterfly arch continuous girder bridge with large angle V-shaped pier
WANG Li-feng, XIAO Zi-wang, ZHANG Zhen-wei, JIA Yan-min, SUN Yong
Abstract: The risk analysis problem of bridge construction was studied based on HGMFN comprehensive evaluation method, and a practical approach was proposed for V-shaped pier in construction process.The highest risk factor in V-shaped pier construction was confirmed by using AHP and grey theory, and construct...
2012, 12(3): 28-36. doi: 10.19818/j.cnki.1671-1637.2012.03.005
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Transportation vehicle engineering
Dynamics simulation models of coupler systems for freight locomotive
WU Qing, LUO Shi-hui, WEI Chong-feng, MA Wei-hua
Abstract: The working principles of two types of coupler systems were analysed.Based on considering the friction pairs of coupler tails and real-time aligning shoulders, coupler system models were set up by using control system simulation method.Nonlinear draft gear with hysteresis characteristic was modelled...
2012, 12(3): 37-43. doi: 10.19818/j.cnki.1671-1637.2012.03.006
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Control strategy of power performance and fuel economy for CVT vehicle on long uphill highway
YAN Guang-hui, YU Qiang, GUAN Zhi-wei, DU Feng
Abstract: The control strategy of CVT transmission ratio, the power performance and fuel economy of vehicle on long uphill highway were analyzed. Multiple work points between the best dynamic and best economical rotational speeds of engine at equal interval were selected, and the influence of transmission rat...
2012, 12(3): 44-52. doi: 10.19818/j.cnki.1671-1637.2012.03.007
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Frictional noise analysis of gas-solid interface with circular dents for high-speed train
LIN Shi-cai, WANG Jiu-gen
Abstract: Based on Prandtl boundary theory and frictional noise theory, a noise model of gas-solid interface of high-speed train was established, and the fields of pressure, rate and noise intensity were examined.The surface texture with circular dents for railway carriage was designed by mimicking eagle feat...
2012, 12(3): 53-59. doi: 10.19818/j.cnki.1671-1637.2012.03.008
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Safety analysis of railway vehicle in leakage process of air spring
GAO Hao, LUO Ren, CHI Mao-ru, DAI Huan-yun
Abstract: The leakage model of air spring with stiffness decay characteristics and the nonlinear stick-slip contact model were established.The dynamic process in loss of gas and the state of emergency after loss of gas were simulated by combining the two models with vehicle system dynamics.The stability of ve...
2012, 12(3): 60-66. doi: 10.19818/j.cnki.1671-1637.2012.03.009
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Transportation planning and management
Travel choice behavior based on regret theory view
XIANYU Jian-chuan, JUAN Zhi-cai, ZHU Tai-ying
Abstract: Based on random regret minimization(RRM) theory and random utility maximization(RUM) theory, RRM-MNL model and RUM-MNL model were set up to research the choice behaviors of travel modes respectively.Aiming at RRM-MNL model and RUM-MNL model, the parameters and the goodnesses of fit were compared, th...
2012, 12(3): 67-72. doi: 10.19818/j.cnki.1671-1637.2012.03.010
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Temporal-spacial characteristic of urban expressway under jam flow condition
DONG Chun-jiao, SHAO Chun-fu, MA Zhuang-lin, ZHUGE Cheng-xiang, LI Yang-yang
Abstract: Based on the auto-correlation function method of time sequence, the stationarities of time sequences for traffic flow, time occupancy and average speed were judged.Based on the G-P algorithm of chaos analysis, the non-stationary time sequence of traffic flow parameter was transformed to the stationa...
2012, 12(3): 73-79. doi: 10.19818/j.cnki.1671-1637.2012.03.011
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Predictive method of highway freight volume based on fuzzy linear regression model
ZHAO Jian-you, ZHOU Sun-feng, CUI Xiao-juan, WANG Gao-qing
Abstract: The influence factors of highway freight volume were determined, such as GDP, population quantity, the total amount of social consuming retails and the output value of sideline products, and a predictive method of highway freight volume based on fuzzy linear regression model was set up.The highway f...
2012, 12(3): 80-85. doi: 10.19818/j.cnki.1671-1637.2012.03.012
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Path optimization algorithm of dynamic scheduling for container truck
LI Guang-ru, YANG Da-ben, REN Da-wei
Abstract: From the point of integrated scheduling, the dynamic scheduling method of whole terminal operating field was analyzed, and a new adaptive ant colony optimization of dynamic scheduling for container truck was put out.The GPRS system of terminal was used, and the perception chain was set up by using r...
2012, 12(3): 86-91. doi: 10.19818/j.cnki.1671-1637.2012.03.013
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Integrated scheduling model of mixed cross-operation for container terminal
CHEN Chao, ZHANG Zhe, CENG Qing-cheng
Abstract: Aiming at the relations among several links such as berth distribution, loading operation and unloading operation and horizontal handling in the import and export operation system of container terminal, the effect of existed import and export operation system on the production efficiency and operati...
2012, 12(3): 92-100. doi: 10.19818/j.cnki.1671-1637.2012.03.014
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Traffic information engineering and control
RLRM control method of single entrance ramp for highway
WANG Xing-ju, GAO Gui-feng, MIYAGI T
Abstract: In order to relieve freeway traffic congestion, reinforcement learning ramp metering(RLRM) control method for single entrance ramp of highway under the incomplete information was proposed based on the artificial intelligence theories of reinforcement learning.Average speeds, average densities, traff...
2012, 12(3): 101-107. doi: 10.19818/j.cnki.1671-1637.2012.03.015
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Coordinated control model of regional traffic signals
LIU Qin, XU Jian-min
Abstract: In order to improve the traffic efficiency of traffic area, a coordinated control model of regional signals was constructed under all kinds of traffic conditions.The total queue vehicle number and the total output vehicle number of regional intersection were used as performance indexes of the model....
2012, 12(3): 108-112. doi: 10.19818/j.cnki.1671-1637.2012.03.016
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Compression method of traffic flow data based on compressed sensing
LI Qing-quan, ZHOU Yao, LE Yang, YE Jia-an
Abstract: In order to obtain transformation matrix accurately, a new compression method of traffic flow data based on compressed sensing was introduced.The original data were projected into the low-dimension space directly by Gauss projection regardless of transformation matrix selection at the data compressi...
2012, 12(3): 113-119. doi: 10.19818/j.cnki.1671-1637.2012.03.017
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Quantitative method of traffic conflict severity at intersection
LIU Miao-miao, LU Guang-quan, WANG Yun-peng, TIAN Da-xin
Abstract: In order to improve the precision in traffic conflict severity discrimination, a quantitative method for conflict severity at intersection was proposed based on the circle assumption of motor units and video detection technology.The moving parameters of motor units were obtained by using the video p...
2012, 12(3): 120-126. doi: 10.19818/j.cnki.1671-1637.2012.03.018
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