西南交通大学学报

Measurement Foundation of Railway Track Geometrical Parameters Based on Strapdown Inertial Technique

WANG Xuemei, NI Wenbo

2012, 25(3): 355-360. doi: 10.3969/j.issn.0258-2724.2012.03.001

[Abstract](1962)

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In order to found the datum plane of measurement of railway track geometrical parameters, a method to found the datum plane based on the strapdown inertial technique was researched to overcome the shortcomings of the traditional gyro platform. By analyzing the basic cant measurement principle, it wa...

Calculation of Braking Force of Continuous Welded Rail on Large-Span Steel Truss Cable-Stayed Bridge

ZHAO Weihua, WANG Ping, CAO Yang

2012, 25(3): 361-366. doi: 10.3969/j.issn.0258-2724.2012.03.002

[Abstract](1879)

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In order to probe into the transmission mechanism of braking force on continuous welded rail (CWR) on a large-span steel truss cable-stayed bridge, a plane model for bridge-rail interaction was established based on the finite element method and the bridge-rail interaction theory. In this model, all ...

Dynamic Stability of Long-Span CFST Arch Bridge under Action of Near-Fault Ground Motions

XING Fan, ZHU Bing, ZHAO Canhui

2012, 25(3): 367-372. doi: 10.3969/j.issn.0258-2724.2012.03.003

[Abstract](1828)

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In order to research the dynamic stability performances of long-span CFST (concrete-filled steel tubular) arch bridges under the action of near-fault ground motions, an arch bridge with a 132 m main span was taken as the engineering background, and seismic records of the Chi-Chi earthquake in Taiwan...

Effects of Hydrodynamic Pressure on Seismic Response of Continuous Rigid-Framed Bridge

YANG Wanli, LI Qiao

2012, 25(3): 373-378. doi: 10.3969/j.issn.0258-2724.2012.03.004

[Abstract](1496)

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The hydrodynamic pressure caused by inner water and outer water of thin-walled hollow piers under earthquake has an effect on the dynamic response of continuous rigid-framed bridges. In order to investigate the effect, a calculation model for the continuous rigid-framed part of Miaoziping Minjiang b...

Fatigue Design Parameters for Orthotropic Steel Decks of Single Plane Cable-Stayed Bridges

YE Huawen, XU Xun, QIANG Shizhong, HOU Suwei

2012, 25(3): 379-386. doi: 10.3969/j.issn.0258-2724.2012.03.005

[Abstract](2499)

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Experiment and finite element analysis (FEA) were conducted on the orthotropic steel decks of two single plane cable-stayed bridges in Chongqing municipality, China, to verify the fatigue design parameters. A full scale specimen with the actual connection details of the longitudinal ribs, crossbeams...

Quantitative Hazard Assessment of Road Debris Flow in Wenchuan Earthquake Area: A Case Study of Xiaojia Ravine in Wenchuan County

XIANG Lingzhi, CUI Peng, ZHONG Dunlun, GE Yonggang, ZHU Xinghua, YANG Wei

2012, 25(3): 387-393. doi: 10.3969/j.issn.0258-2724.2012.03.006

[Abstract](2201)

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A quantitative assessment method of debris flow hazard to roads in Wenchuan earthquake areas was established based on the case study of Xiaojia ravine to assess serious debris flow disasters happening frequently in 3 years after the Wenchuan earthquake. The environmental and geology background and t...

Bending Mechanical Properties of Cement Concrete with Fiber Grid Reinforcement

YAN Xiangcheng, WENG Xingzhong, KOU Yanan, LIANG Lei, ZHANG Guangxian

2012, 25(3): 394-399. doi: 10.3969/j.issn.0258-2724.2012.03.007

[Abstract](1822)

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In order to investigate the influence of fiber grid type, surface treatment and coarse aggregate limiting grain size on bending mechanical properties of cement concrete, fourteen group specimens with dimensions of 150 mm150 mm600 mm were tested through four-point bending experiments. The failure pro...

Nonlinear Analysis and Simulation of Valley Current Controlled Flyback Converter

HE Shengzhong, XU Jianping, WU Songrong, ZHOU Guohua, WANG Jinping

2012, 25(3): 400-405. doi: 10.3969/j.issn.0258-2724.2012.03.008

[Abstract](1484)

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For parameter design of switching DC-DC converters, dynamic equations and a discrete mapping model of valley current controlled flyback converter were established, and its complex nonlinear dynamic behaviors were investigated using bifurcation diagram and Poincar map. In addition, the stability and ...

Multi-granularity Complex Network Model Based on GIS

LI Yongshu, LIU Gang, ZHANG Shuaiyi

2012, 25(3): 406-412,419. doi: 10.3969/j.issn.0258-2724.2012.03.009

[Abstract](1897)

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For the purpose of enhancing the accuracy of the failure spreading and reliability analyses of an urban road network, three kinds of road failure were studied. Based on this, a multi-granularity complex network model was proposed based on the complex network theory, and a generalized network of urba...

Dynamic Simulation Analysis of Bar Insulator Pollution in Strong Wind

SUN Jixing, WU Guangning, CHEN Weirong, GAO Guoqiang, CUI Yi, WANG Bo

2012, 25(3): 413-419. doi: 10.3969/j.issn.0258-2724.2012.03.010

[Abstract](1548)

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In order to probe into the pollution characters of the surface of an insulator used in high-speed railway, forces on polluted particles in a strong wind environment were analyzed, and a simulation model for pollution of QBJ-25/20 type bar insulator was established. By taking the pollution volume fra...

Global Exponential Stability for a Class of Stochastic Nonlinear Interconnected Large-Scale Systems

SHI Jizhong, ZHANG Jiye

2012, 25(3): 420-426. doi: 10.3969/j.issn.0258-2724.2012.03.011

[Abstract](1552)

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In order to study the effects of random errors caused by vehicle modeling on interconnected large-scale systems like the automated highway vehicle system, the deterministic theory was extended to the random case theory, and a proper vector Lyapunov function was constructed using the matrix theory an...

Content-Based Fragile Audio Watermarking Algorithm in DCT Domain

ZHANG Jinquan, WANG Hongxia

2012, 25(3): 427-432. doi: 10.3969/j.issn.0258-2724.2012.03.012

[Abstract](1774)

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In order to realize the integrity authentication of audio files, a content-based fragile watermarking algorithm was proposed. To an one-dimensional sequence, the modification of alternating coefficient in DCT (discrete cosine transformation) will not change the sum of the sequence. Based on this pro...

Control of Superlong Bar LED Display Panel Based on Multiport Serial Flash

WU Zhiquan, JIN Wei, ZHU Yunfang, LI Qi

2012, 25(3): 433-438. doi: 10.3969/j.issn.0258-2724.2012.03.013

[Abstract](1539)

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In order to increase the display data output rate with the same system cost, an LED display control system based on multiport serial flash was proposed through analyzing the cell boards of the existing bar LED display panels. The system consists of high-speed 1T MCU (micro control unit) of STC12C561...

Vision-Based Detection of Moving Vehicles Using Wavelet Modulus History Images

QU Zhenshen, YU Mengmeng, JIANG Yonglin, WEN Fan, WANG Changhong

2012, 25(3): 439-445. doi: 10.3969/j.issn.0258-2724.2012.03.014

[Abstract](1533)

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To improve the robustness and accuracy of vehicle detection, a new detection method of moving vehicles was put forward based on background subtraction and wavelet decomposition modulus history images. First, wavelet decomposition was performed on the original image. In low frequency component, the G...

Comparison of Headways in Moving Block and Fallback Modes for CBTC System

HE Chengcai, YANG Tao

2012, 25(3): 446-450,457. doi: 10.3969/j.issn.0258-2724.2012.03.015

[Abstract](1824)

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In order to research the feature of headway in a Fallback mode and the difference to a normal mode for a CBTC (communication based train control) system, the basic principle of the CBTC system and the relative technology about moving block and Fallback modes were investigated, models for train headw...

Continuous Visible Reverse Nearest Neighbor Queries in Spatial Databases

YANG Zexue, HAO Zhongxiao

2012, 25(3): 451-457. doi: 10.3969/j.issn.0258-2724.2012.03.016

[Abstract](1369)

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In order to solve the problem of CRNN (continuous reverse nearest neighbor) query in an obstacle environment, the visibility was added to the CRNN query by taking obstacles into consideration, and a novel variant of CRNN queries, namely continuous visible reverse nearest neighbor (CVRNN) search, was...

Triangular Mesh Segmentation Based on Spherical Images

MA Yuankui, ZHANG Shusheng, BAI Xiaoliang, FAN Haitao

2012, 25(3): 458-464. doi: 10.3969/j.issn.0258-2724.2012.03.017

[Abstract](1753)

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In order to manage and reuse triangular mesh models with local shapes, a segmenting method for triangular mesh models based on spherical images was proposed. With this method geometric signals of a triangular mesh model are mapped into spherical images through spherical parameterization and partitio...

Re-adhesion Optimization Control Strategy for Metro Traction

LIN Wenli, LIU Zhigang, FANG Youtong

2012, 25(3): 465-470. doi: 10.3969/j.issn.0258-2724.2012.03.018

[Abstract](1379)

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To make full use of the adhesion force between wheels and tracks and guarantee the train traction/brake performances, a re-adhesion optimization control strategy based on full-dimension state observer was proposed. When detecting slip/slide phenomena, this method could realize the optimal adhesion u...

Calculation Errors of Performance Parameters of Hydraulic Torque Converter and Their Corrections

LUO Hong, WANG Tengteng, LI Xingquan, LI Yingqiang

2012, 25(3): 471-476. doi: 10.3969/j.issn.0258-2724.2012.03.019

[Abstract](1794)

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In order to improve the numerical simulation precision of hydraulic torque converters, the performance parameters, including torque ratio, efficiency and pump capacity factor, were calculated by the CFD (computational fluid dynamics) method. Calculation errors of the performance parameters were anal...

Rear Axle Compliance Steering Performance Analysis of Five-Link Dependent Rear Suspension

PAN Xiao, LIN Yi, CHEN Xiaokai, WANG Dongcheng

2012, 25(3): 477-483. doi: 10.3969/j.issn.0258-2724.2012.03.020

[Abstract](1537)

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In order to study the handing stability of vehicles with five-link dependent rear suspension, a linear three-degrees-of-freedom handling model of the vehicle including rear axle compliance steering was established. The influences of the rear axle compliance steering on the vehicle under-steering cha...

Two-Stage Optimization Algorithm for Stop Schedule Plan of High-Speed Train

HUANG Jian, PENG Qiyuan

2012, 25(3): 484-489. doi: 10.3969/j.issn.0258-2724.2012.03.021

[Abstract](1255)

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To improve optimization efficiency of the stop schedule plan of high-speed trains, the main factors influencing train stop schedule plans were analyzed based on the principles of stop schedule plan of high-speed trains. An optimization model was proposed, in which passengers' traveling convenience a...

Evaluation of Coordination between Railway Transportation and Open-Pit Mining Based on Efficacy and Coupling

LI Xin, SHANG Tao, ZHOU Wei

2012, 25(3): 490-494. doi: 10.3969/j.issn.0258-2724.2012.03.022

[Abstract](1353)

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In order to evaluate the coordination relationship between railway transportation system and open-pit production, a coupling degree model is established under the capacity-coupling theory. This model quantitatively analyzes the coordination level of mine production and transportation systems as well...

Repairing Unit Location Problem in Background of Mobile Battle

YE Qing, SONG Jianshe, CHEN Chunxia

2012, 25(3): 495-501. doi: 10.3969/j.issn.0258-2724.2012.03.023

[Abstract](1628)

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To solve the problem of rational location of repairing units and improve the timeliness of the battlefield-repairing, a new location model with double coverage standards was constructed based on Laplace criterion of uncertainty decision and aiming at the maximum of edge covering ratio of the whole r...

Using ADAMS to Assess Dynamic Load of Pavement during Aircraft Landing

LIANG Lei, GU Qiangkang, LIU Guodong, ZHANG Renyi, JIANG Le

2012, 25(3): 502-508. doi: 10.3969/j.issn.0258-2724.2012.03.024

[Abstract](2256)

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In order to provide a rational dynamic load coefficient for airport rigid pavement design and reduce the workload of the pavement dynamic load test, the software ADAMS was used to analyze the dynamic response mechanisms of the vertical load, longitudinal load, and lateral load on the pavement. The l...

Optimization Algorithm for Flexible Job-Shop Scheduling Problem Based on Heuristic Rules and Adjustment of Critical Paths

SHUAI Qi, YAO Xifan

2012, 25(3): 509-515. doi: 10.3969/j.issn.0258-2724.2012.03.025

[Abstract](1427)

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In order to overcome the disadvantages of long computing time and unstable result of traditional evolutionary algorithms in solving the optimization for large flexible job-shop problems (FJSPs), a heuristic critical path approach (HCPA) was proposed. This method first uses a heuristic rule to get so...

Stochastic Mean-Excess User Equilibrium Model with Multiple Classes and Elastic Demand

LV Biao, PU Yun, LIU Haixu

2012, 25(3): 516-525. doi: 10.3969/j.issn.0258-2724.2012.03.026

[Abstract](2219)

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In order to accurately describe travelers' route choice behaviors for avoiding risks caused by uncertainties about travel time in a stochastic road network, the calculation formula of mean-excess travel time was derived for conditions when the traffic demand of commuters follows a log-normal distrib...

Product Family Design Based on Mechanism of Population Evolution

NIE Yong, YIN Guofu, ZHAO Xiufen

2012, 25(3): 526-532. doi: 10.3969/j.issn.0258-2724.2012.03.027

[Abstract](1586)

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In order to attain a rapid response to customers' individualized needs in market segments, a process model of product family evolutionary design was established according to the biological evolutionism. Based on the definitions of product genes and product allelic genes, a new four-layer product fam...

Exprimental Study on Acceleration of Landfill Stabilization Process Using Bioaugmentation Technology

QIU Zhongping

2012, 25(3): 533-537. doi: 10.3969/j.issn.0258-2724.2012.03.028

[Abstract](1957)

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In order to overcome the drawbacks of traditional methods in landfill treatment, such as slow degradation of organic waste, long-lasting stabilization, and complicated operation and management, a new bioaugmentation technology was proposed to accelerate the stabilization of landfill processing. Thro...

2012, 25(3): 538-538.

[Abstract](986)

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2012 Vol. 25, No. 3