• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
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2013 Vol. 26, No. 6

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Evaluation Theory and Method of High-Speed Train Diagrams
PENG Qiyuan, BAO Jingjing, WEN Chao, FENG Liping
2013, 26(6): 969-974. doi: 10.3969/j.issn.0258-2724.2013.06.001
[Abstract](1490) PDF 754KB(595)
Abstract:
In order to improve the quality of high-speed train diagram, a complete evaluation index system for high-speed train diagrams was established. In the system, the evaluation indexes are extracted from three aspects, i.e., the train diagram production efficiency, passenger service quality, and dynamic...
Numerical Simulation of Stochastic Characteristics of Fluctuating Lift on a Fixed Circular Cylinder
ZHU Zhiwen
2013, 26(6): 975-982. doi: 10.3969/j.issn.0258-2724.2013.06.002
[Abstract](1116) PDF 896KB(542)
Abstract:
In order to investigate the applicability of large eddy simulation (LES) in wind engineering research, numerical simulation was carried out for flow field around a circular cylinder at Re=4.11104. The obtained mean and root mean square (RMS) component of fluctuating pressure and the vortex shedding ...
Aerodynamic Stability of Long-Span Bridges in Post Flutter
WANG Qi, LIAO Haili, LI Mingshui, MA Cunming
2013, 26(6): 983-988. doi: 10.3969/j.issn.0258-2724.2013.06.003
[Abstract](1125) PDF 663KB(543)
Abstract:
To provide reasonable explanations for the motion types of girder in post flutter status of long-span bridges, the nonlinear aerodynamic stability of bridge girder was analyzed based on an existing nonlinear motion-induced aerodynamic force (MIAF) model and the nonlinear vibration differential equat...
Influence of Track Regularity and Soil Dynamic Characteristics on Vibration of Subway Tunnel
WEI Kai, ZHAI Wanming, XIAO Junhua
2013, 26(6): 989-995. doi: 10.3969/j.issn.0258-2724.2013.06.004
[Abstract](1212) PDF 779KB(471)
Abstract:
In order to accurately calculate the frequency-domain vibration response of a subway shield tunnel due to dynamic loading of trains, a vertical coupling dynamic model of subway shield tunnel is established to study the influence of the nonlinear variation of soft-soil dynamic stiffness on the random...
Influence of Stochastic Cracks on Sulfate Diffusion in Concrete of Underground Structure
LIU Weiqing, LIU Xin, WANG Shuguang, DU Dongsheng
2013, 26(6): 996-1001. doi: 10.3969/j.issn.0258-2724.2013.06.005
[Abstract](1152) PDF 752KB(492)
Abstract:
The influence of the stochastic crack width on sulfate diffusion coefficient and concentration in underground concrete was investigated. It is assumed that the crack is composed of crack elements, and the probability density function of crack element location along longitudinal direction of the crac...
Parameter Optimization of Fluid Viscous Damper Based on Stochastic Vibration
ZHAO Guohui, LIU Jianxin, LI Yu
2013, 26(6): 1002-1007. doi: 10.3969/j.issn.0258-2724.2013.06.006
[Abstract](1139) PDF 657KB(469)
Abstract:
In order to avoid the large computational cost and low efficiency of parametric-sensitivity methods in the parameter optimization of fluid viscous dampers, the theoretical optimum damping ratio of the bridge superstructure vibration system was derived by stochastic vibration method, and an analytica...
Optimal Selection Model of Railway Location Designs Based on Utility Theory
LUO Yuan, YAO Lingkan, ZHU Ying, YANG Ming
2013, 26(6): 1008-1015,1023. doi: 10.3969/j.issn.0258-2724.2013.06.007
[Abstract](1189) PDF 1015KB(340)
Abstract:
Traditional scheme comparison methods for railway route selection have not taken into account the impact of different macroeconomic situations on the optimal selection of railway locations. Besides, there still exist operational difficulties in qualification of indicators that cannot be measured by ...
Stochastic Ultimate Bearing Capacity Analysis Based on Elastic Modulus Reduction Method
YANG Lufeng, WU Wenlong, YU Bo
2013, 26(6): 1016-1023. doi: 10.3969/j.issn.0258-2724.2013.06.008
[Abstract](1160) PDF 948KB(342)
Abstract:
To determine the stochastic ultimate bearing capacity of engineering structures, a novel method for stochastic ultimate bearing capacity analysis based on the elastic modulus reduction method (EMRM) was proposed by combining the elastic modulus adjustment procedure (EMAP) and the perturbation stocha...
Distinguishing between Sensor Deterioration and Structural Damage
MA Shenglan, WENG Liuqing, JIANG Shaofei
2013, 26(6): 1024-1030. doi: 10.3969/j.issn.0258-2724.2013.06.009
[Abstract](1094) PDF 809KB(514)
Abstract:
Current detection methods for structural damage only consider environmental or operational effects on damage detection, but neglect the problem that sensor performance degradation can be caused by environmental changes, and thus seriously affects the damage detection accuracy. In this paper, a metho...
Experimental Study on Damage Identification of Pipeline Based on Operational Strain Modal Shape
XU Chengxiang, JIA Shanpo, TU Jinzhao, DU Guofeng
2013, 26(6): 1031-1037. doi: 10.3969/j.issn.0258-2724.2013.06.010
[Abstract](1442) PDF 777KB(406)
Abstract:
In order to make damage detection, real-time safety evaluation and life prediction of pipelines, and hence prevent pipeline accidents, difference formulas of strain mode for damaged pipelines are derived based on vibration tests and the character of one-dimensional continuum of pipelines, and a math...
A Filtering Method for LiDAR Cloud Points in Urban Areas Based on Serial Morphological Operators
SUN Meiling, LI Yongshu, CHEN Qiang, CAI Guolin
2013, 26(6): 1038-1044. doi: 10.3969/j.issn.0258-2724.2013.06.011
[Abstract](1028) PDF 983KB(334)
Abstract:
To improve the accuracy of single morphological operator and automatic classification in LiDAR filtering, a new LiDAR filtering method based on serial morphological operators was presented. In view of the characteristics of morphological operators and the features of different objects in LiDAR point...
Automatic Train Control Algorithm for Train Tracking
WANG Pengling, WANG Qingyuan, CUI Hengbin, MA Lei, FENG Xiaoyun
2013, 26(6): 1045-1051. doi: 10.3969/j.issn.0258-2724.2013.06.012
[Abstract](1065) PDF 728KB(589)
Abstract:
To build a safe and stable operation strategy for train tracking, a train tracking model was established by the train longitudinal dynamics. In the model, control objectives of the train operation differ between single-and multi-train operation: In the single train operation, the train runs on a cur...
Characteristics of Cathode System in Fuel Cells for Electric Vehicles
GUO Ai, LI Qi, CHEN Weirong, LIU Zhixiang
2013, 26(6): 1052-1058. doi: 10.3969/j.issn.0258-2724.2013.06.013
[Abstract](1081) PDF 784KB(470)
Abstract:
To improve the efficiency of fuel cells for vehicles, a cathode system model with a twin screw compressor was built by mass conservation, ideal gas law, and two-dimensional interpolation method. The methods to compute the air flow rate and the power of the compressor were discussed according to its ...
Inductance Characteristics of Bearingless Permanent Magnet Synchronous Motor
SUN Xiaodong, CHEN Long, YANG Zebin, LI Feng, ZHU Huangqiu
2013, 26(6): 1059-1065. doi: 10.3969/j.issn.0258-2724.2013.06.014
[Abstract](1178) PDF 860KB(443)
Abstract:
In order to solve the problem that the inductance parameters of the bearingless permanent magnet synchronous motor (BPMSM) can not be measured accurately by experiments, the inductance characteristics of a two-pole surface-mounted BPMSM with four-pole suspension system was investigated using finite ...
Power System Design and Integral Modeling of Fuel Cell Electric Bicycles
CHEN Weirong, LI Xiaoyan, PENG Fei
2013, 26(6): 1066-1071. doi: 10.3969/j.issn.0258-2724.2013.06.015
[Abstract](1183) PDF 637KB(491)
Abstract:
In order to solve the problem of output voltage ripple that is harmful to stable operation of fuel cell electrical bicycles, a two-phase interleaved DC/DC converter for fuel cell electric bicycles was designed and constructed. Based on the design, an integral model of the fuel cell electrical bicycl...
Experimental Research of Heat-Transfer Measurements on Stagnation Points
QIN Feng, HE Chuan, ZENG Lei, KONG Rongzong, LIU Jichun
2013, 26(6): 1072-1077. doi: 10.3969/j.issn.0258-2724.2013.06.016
[Abstract](979) PDF 810KB(308)
Abstract:
In order to improve the measurement precision of stagnation point heat transfer in shock tunnel tests, a research on developing a coaxial thermal-couple of 1 mm diameter and improving the endurance of thin-film heat-transfer sensors was carried out. Data processing methods of the two sensors were es...
Origin-Destination Matrix Estimation Model for Freeway Oriented Internet of Vehicles
WANG Chengliang, ZHANG Chen, HUANG Wenlong
2013, 26(6): 1078-1083. doi: 10.3969/j.issn.0258-2724.2013.06.017
[Abstract](1184) PDF 667KB(424)
Abstract:
The internet of vehicles with radio frequency identification technology (RFID) was applied to capturing an OD matrix with missing data. In the OD matrix estimation model, Lagrange multiplier method was used to solve the maximum likelihood estimation for the probability of OD matrix elements. The alg...
Source Number Estimation of Underdetermined Blind Mixing Signals Based on Spatial Time-Frequency Distribution and Parallel Factor Analysis
XIA Jianghua, GUO Jin, WANG Xiaomin
2013, 26(6): 1084-1089. doi: 10.3969/j.issn.0258-2724.2013.06.018
[Abstract](960) PDF 712KB(444)
Abstract:
To estimate the number of sources of underdetermined blind mixing signals, a novel algorithm based on spatial time-frequency distribution (STFD) and parallel factor analysis (PARAFAC) was proposed. The time-frequency distribution matrices corresponding to the single auto-terms time-frequency (TF) po...
Joint Precoding Design and Power Control in MIMO Two-Way Relay Network
YANG Dingcheng, XIAO Lin, LIU Sheng'en
2013, 26(6): 1090-1096,1128. doi: 10.3969/j.issn.0258-2724.2013.06.019
[Abstract](995) PDF 867KB(310)
Abstract:
In order to enhance spatial multiplexing gain of multiple input multiple output (MIMO) two-way relay networks, the transceiver precoding matrixes for all nodes with low complexity were investigated. Using subspace alignment scheme, the bi-directional MIMO channel can be decoupled into several single...
A Face Recognition Method Based on Kernel Locality Preserving Projection
QI Yongfeng, HUO Yuanlian
2013, 26(6): 1097-1103. doi: 10.3969/j.issn.0258-2724.2013.06.020
[Abstract](1079) PDF 826KB(420)
Abstract:
To effectively extract non-linear structure information of face images, a novel method based on maximum scatter difference rule was proposed in this paper. Firstly, the kernel function was used to map original sample data into high dimensional feature space and the scatter matrices were obtained. Se...
Friction Power Loss of Swing Movable Teeth Transmission under Elastohydrodynamic Lubrication
LIANG Shangming, ZHANG Jie, YAO Jin
2013, 26(6): 1104-1109. doi: 10.3969/j.issn.0258-2724.2013.06.021
[Abstract](940) PDF 707KB(373)
Abstract:
To obtain the sliding friction power loss of swing movable teeth transmission under elastohydrodynamic lubrication accurately, the calculation method of the sliding friction coefficient between movable teeth and the internal gear under elastohydrodynamic lubrication was discussed, and the time-varyi...
Energy-Saving System for Hybrid Hydraulic Excavators
WU Wenhai, KE Jian, LIU Huanlong, WANG Guozhi
2013, 26(6): 1110-1115. doi: 10.3969/j.issn.0258-2724.2013.06.022
[Abstract](1055) PDF 683KB(472)
Abstract:
To reduce energy consumption and carbon emissions of medium-sized hydraulic excavators, a hydraulic-electric hybrid power system and a hydraulic-hybrid power system, both with energy recovery equipment, were devised in combination with the current energy-saving method after the energy-consumption ch...
Train Routing Optimization Model for Urban Rail Transit
CHENG Jie, PENG Qiyuan, ZHAO Jun
2013, 26(6): 1116-1121. doi: 10.3969/j.issn.0258-2724.2013.06.023
[Abstract](1165) PDF 670KB(614)
Abstract:
In order to determine operation sections and turning-back stations of urban rail trains, a multi-objective 0-1 mixed integer train routing model was built based on the practical experience of transportation organization by pursuing the best match between space distribution of train capacity and pass...
Relation and Risk in Owner and Contractors of Tunnel Projects Based on Probability and Logic Theories
HU Lan, HU Pei
2013, 26(6): 1122-1128. doi: 10.3969/j.issn.0258-2724.2013.06.024
[Abstract](1057) PDF 793KB(525)
Abstract:
Based on classic probability and logic theories, a probability evaluation method was presented to assess relation and risk in owner and contractors of tunnel and underground projects. By analyzing real project cases, several logic probability tree models were built from the perspective of the logic ...
Lead-Time Based Multi-agent Policies Synergy and Optimization between Quay and Supply Chains
ZHOU Jianpin
2013, 26(6): 1129-1135. doi: 10.3969/j.issn.0258-2724.2013.06.025
[Abstract](1462) PDF 882KB(343)
Abstract:
Targeting the great uncertainty of the process lead time in the international supply and distribution networks, the paper proposed a coordination framework of mixed multi-agent policies between the quay system and supply chains, and built a loop optimization decision-making model based on the tactic...
Analysis of Collusion between Contractors and Supervisors in Constructions
ZHAO Lei, ZHONG Sheng
2013, 26(6): 1136-1141. doi: 10.3969/j.issn.0258-2724.2013.06.026
[Abstract](1030) PDF 752KB(394)
Abstract:
In order to avoid collusions between supervisors and contractors due to benefit drive and asymmetrical information in constructions, a moral hazard model with a single principal and multiple agents was set up by using regulation theory and introducing a hierarchical principal-supervisor-agent struct...
Evaluation Model of Critical Thermal Shock Resistance Temperature Difference for Engineering Ceramics
ZHOU Zehua, WANG Guowei
2013, 26(6): 1142-1146. doi: 10.3969/j.issn.0258-2724.2013.06.027
[Abstract](977) PDF 627KB(298)
Abstract:
Traditional thermal shock resistance theories cannot be used for quantitative evaluation of thermal shock property of ceramics. To solve this problem, a novel model of thermal shock resistance for engineering ceramics was developed on the basis of traditional theories and previous research achieveme...

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