西南交通大学学报

Analysis of Residential Accessibility of Stream Systems in Downtown Area of Nanjing

ZONG Yueguang, LIU Yingzi, WU Peng

2009, 22(6): 799-805.

[Abstract](1490)

Abstract:
To research the effect of the accessibility of stream systems on the distribution of residential areas,an accessibility analysis model was built in the module of GIS(geographic information system) software based on the shortest distance analysis method and the transport accessibility theory.ArcGIS9....

Vehicle-Bridge Coupling Vibration Analysis of PC Rail Beam of Straddle-Type Monorail Transportation

MA Jibing, PU Qianhui, HUO Xuejin

2009, 22(6): 806-811,829.

[Abstract](1829)

Abstract:
In order to discuss the dynamic responses of a straddle-type monorail transportation system,a dynamic model for a monorail vehicle with 15 DOFs(degrees of freedom) was established by employing the linear tire model.The radial rigidities,side-leaning effects and longitudinal slide-turning characteris...

Influencing Factors of Ultimate Load-Bearing Capacity of Long-Span Composite Girder Cable-Stayed Bridge

LEI Yu, ZHAO Lei, LI Xi

2009, 22(6): 812-816.

[Abstract](1751)

Abstract:
In order to deeply research the effects of stay cable breaking,relative interface slip of composite girder and deck shear-lag effect on structural ultimate load-bearing capacity,Guanyinyan composite girder cable-stayed bridge in Jiangjin in Chongqing,as the engineering background,was investigated by...

Performance-Based Damage Analysis for PC Continuous Rigid Frame Bridges

ZHANG Fang, QIAN Yongjiu, TANG Jishun

2009, 22(6): 817-822.

[Abstract](1727)

Abstract:
In order to find out the causes of the cracking and deflection of PC(prestressed concrete) continuous rigid frame bridges,a damage analysis method based on structure performance was proposed.In this method,the objective manifestations of structure performances are considered as the focus of attentio...

Experimental Investigation of Fatigue Behavior of Tension Steel Plate Reinforced with Prestressed CFRP Laminates

YE Huawen, KÖ, NIG Christian, UMMENHOFER Thomas, QIANG Shizhong

2009, 22(6): 823-829.

[Abstract](1700)

Abstract:
To properly estimate the fatigue performances of a steel structure reinforced with prestressed CFRP(carbon fiber reinforcement polymer) plates,a modified Paris’ equation based on effective stress intensity factor range was presented to analyze the propagation of fatigue cracks.The effects of stress ...

Detection of Gross Errors in DEM Based on Principal Components Analysis

YANG Xiaoyun, CEN Minyi, LIANG Xin

2009, 22(6): 830-834,854.

[Abstract](1545)

Abstract:
To probe into the effect of error spatial distribution on the detection rate of gross error for a digital elevation model(DEM),two different models,spike-like and pyramid-like gross error models,were constructed.Data with different gross error rates of 0.2% to 3.0% were simulated and added to DEM ra...

Simulation Analysis of Dynamic Characteristic of Harmonics for High-Speed Locomotive Running at Rated Power

GUO Lei, LI Qunzhan, LIU Wei, XIE Shaofeng

2009, 22(6): 835-840.

[Abstract](1795)

Abstract:
An analytical method for calculating the dynamic characteristic of the harmonics of high-speed locomotives running at a rated power was presented by analyzing the generation process of harmonic voltage and the characteristics of harmonic impedance of a traction power supply system.Based on the doubl...

Optimal Compensation Models in Cophase Power Supply System

ZHANG Xiufeng, LÜ, Xiaoqin, LIAN Jisan

2009, 22(6): 841-847.

[Abstract](1677)

Abstract:
To balance the three phases,filter the harmonics and compensate the reactive power in a cophase power supply system,two optimal compensation models were proposed: the minimum waveform distortion model,which can get best waveform quality,and the optimum resistance model,which can get optimum load.The...

Probability Distribution of Feeder Current of Traction Substation

ZHANG Liyan, LI Qunzhan, XIE Shaofeng, CHEN Minwu

2009, 22(6): 848-854.

[Abstract](1431)

Abstract:
Based on the theory of stochastic process and the method of numerical analysis,probability density function for the feeder current of traction substations was fitted by using the β-function and the statistical analysis of extensive recorded data of the feeder current.Feeder current samples were obta...

Simulation of High-Speed Pantograph Dynamic Performance Based on Finite Element Model and Aerodynamic Pantograph Model

WU Yan, WU Junyong, ZHENG Jihao

2009, 22(6): 855-859.

[Abstract](1906)

Abstract:
A coupled finite element model for the pantograph-catenary system and an aerodynamic pantograph model were built.Based on the models,the dynamic current collection and aerodynamic performances of the pantograph were studied using MSC-Marc and STAR-CD simulation software.In the finite element model,t...

Robust Strictly Passive Control of Uncertain Descriptor Systems

WANG Cuihong, HUANG Tianmin

2009, 22(6): 860-864,911.

[Abstract](1604)

Abstract:
The strictly passive realness and strictly passive control of an uncertain linear descriptor system was investigated.To solve the problem of equality restriction in strictly passive conditions of a descriptor system,the relationship between the fast and slow subsystems of a descriptor system was des...

IIR Digital Filter Design via Seeker Optimization Algorithm

DAI Chao-Hua, CHEN Wei-Rong, SHU Yun-Fang, ZHENG Yong-Kang, LI Ai

2009, 22(6): 871-876.

[Abstract](2772)

Abstract:
To further improve the performances of infinite impulse response(IIR) digital filters,a new approach based on the seeker optimization algorithm(SOA) was proposed for IIR digital filter design.The SOA is aimed to simulate the random action in human searching behaviors for solving an optimization prob...

Data-Driven Q-Learning in Dynamic Environment

SHEN Yuanxia, WANG Guoyin

2009, 22(6): 877-881.

[Abstract](1620)

Abstract:
It is difficult for reinforcement learning to balance between the exploration of untested actions and the exploitation of known optimum actions in dynamic environment.To address this problem,a data-driven Q-learning algorithm was proposed.In this algorithm,the information system of behavior is const...

Test Study on Stability Control of Locomotive Coupler in Heavy Haul Combined Train

YANG Junjie, LIU Jianxin, LUO Shihui, FENG Quanbao

2009, 22(6): 882-886.

[Abstract](1913)

Abstract:
To control the dynamic stability of locomotive couplers in heavy haul combined trains,a formula for calculating the maximum free swing angle of heavy-haul locomotive couplers was derived from the stability principle of the coupler and the geometric relation between the coupler and carbody on rails.T...

Global Exponential Synchronization of Impulsive Chaotic Neural Networks

XU Xiaohui, CAO Yu, ZHANG Jiye

2009, 22(6): 887-892.

[Abstract](1669)

Abstract:
To study the dynamical behaviors of impulsive neural networks,the global exponential synchronization of a class of impulsive chaotic neural networks with time-varying delays was analyzed based on the conception of drive-response.On the assumption that the activation functions increased monotonously,...

Bayesian Estimation of Vehicle Dynamic Performance by Rail Measurement

CHEN Lei, ZENG Yuqing, YU Weidong

2009, 22(6): 893-899.

[Abstract](1704)

Abstract:
An assessment technique that assesses vehicle dynamic performance using the data of rail measurement was developed by Bayesian estimation principle.The assessing data of dynamic performance were obtained from the on-board and on-ground monitoring in the 35×104 km reliability tests of China speed up ...

Estimation Method of Humping Time in Marshalling Yard

JING Yun, WANG Ciguang, XUE feng, MU feng

2009, 22(6): 900-905.

[Abstract](1434)

Abstract:
To solve the problem that the humping time for trains is highly uncertain during the break up operation in marshalling yard,a regression model was built for interval estimation of the humping time,in which the humping time for a train is used as the dependent variable and the number of cuts in break...

Optimization of Seat Comfort of High-Speed Train

CHEN Xiang, XU Bochu, ZHANG Weihua

2009, 22(6): 906-911.

[Abstract](1922)

Abstract:
To improve the ride comfort of high-speed trains,a questionnaire about the seat comfort of CRH2 high-speed train was carried out.The factors influencing the seat comfort were determined with multiple regression analysis based on the results of the questionnaire,body data of Chinese people,and the se...

Urban Vehicle Routing Based on Ant Colony Algorithm

LIU Jingyu, FANG Yanjun

2009, 22(6): 912-917.

[Abstract](1729)

Abstract:
To solve the problem of urban traffic vehicle routing,an improved ant colony system(ACS) algorithm was proposed.The algorithm focuses on both distance and time costs of path planning.Its search rules and flow charts were given.Based on extensive simulation results,the effects of parameters of the al...

Assessment of Longitudinal Collision Risk on Parallel Routes Based on Communication,Navigation,and Surveillance Performances

ZHANG Zhaoning, LIU Jimin, Wang Lili

2009, 22(6): 918-925.

[Abstract](2192)

Abstract:
In order to study the positioning errors and longitudinal collision risk of flights and their influence factors under communication,navigation and surveillance(CNS),the CNS errors were analyzed and a formula for calculating the longitudinal overlap probability on parallel routes was derived based on...

Event-Driven Dynamic Ground Holding Policy for Single Runways

WANG Fei, XU Xiaohao, ZHANG Jing

2009, 22(6): 926-932.

[Abstract](1656)

Abstract:
In order to ensure flight safety,make full use of airport capacity,and reduce flight delay cost effectively,an event-driven dynamic ground holding policy(GHP) model for single runways was established.The model was then solved by a two-stage hierarchical optimization algorithm.The results of a numeri...

Dynamic Taxiway Routing Algorithm Based on Conflict Avoidance

WANG Yanjun, HU Minghua, SU Wei

2009, 22(6): 933-939.

[Abstract](3266)

Abstract:
To solve the taxi path assignment problem of aircrafts on airport surface,a dynamic taxiway routing algorithm that is based on the time-dependent shortest path(TDSP) algorithm was proposed according to the dynamic characteristic of taxiway system.Three different types of taxi conflict,together with ...

Wigner Functions for Eigenstates of Arbitrary Power of Annihilation Operators

LAN Haijiang, WEI Lianfu

2009, 22(6): 940-945.

[Abstract](1560)

Abstract:
Wigner functions for the eigenstates of arbitrary power of annihilation operators were reconstructed using their expressions in Fock presentations.The distribution of the reconstructed Wigner functions in phase spaces was analyzed,based on which the nonclassical properties of these eigenstates were ...

Analytical Model of Brillouin Scattering Spectrum Measurements in Fibre-Optic Distributed Sensing Systems

XIAO Shanghui, LI Li

2009, 22(6): 946-950.

[Abstract](1557)

Abstract:
Under the condition that the pulse widths are near or below the photon lifetime,i.e.10 ns,scattering spectrum properties of fibre-optic distributed sensing systems were analyzed and discussed.A nonlinear Pseudo-Voigt(P-V) analytical model was established by optimal combination of Lorentzian and Gaus...

Solution to Geomagnetic Systems in Areas with Smooth Magnetic Fields

KOU Yimin, MA Guangcheng, WANG Changhong

2009, 22(6): 951-957.

[Abstract](1615)

Abstract:
To solve the divergence problem of traditional Kalman filter-based geomagnetic navigation systems caused by their unobservability in the areas with smooth magnetic fields,a new algorithm was proposed.The algorithm uses linearized planes to fit a smooth magnetic field,the vector properties of the mag...

Surface Cleanliness Level Detection by Imaging Method for Precision Optical Elements

ZHU Xiaolong, WANG Yi, XIE Zhijiang, LIU Changchun, CHU Hongyu

2009, 22(6): 958-962.

[Abstract](1715)

Abstract:
To avoid the disturbance of flaws and improve the accuracy in measurement of surface cleanliness-level of precise optical elements,an image detection system based on machine vision method was proposed,in which a set of movable clamping fixtures for optical elements of various sizes and a three-dimen...

Electrical Properties of Ce-Doped WO3 Thin Film

DONG Liang, WANG Yu, LI Dezhu, LI Tongye, YAN Zhongming

2009, 22(6): 963-967.

[Abstract](1815)

Abstract:
Ce-doped WO3 thin films were fabricated by DC reactive magnetron sputtering on glass substrates and annealed in dry air at 550℃ for 1 h.The effects of sputtering power on electrical properties of the film were investigated.X-ray diffraction(XRD) and scanning electron microscopy(SEM) analyses were pe...

Analysis of Products from Thermal Decomposition of Waste Computer Mainboard

WANG Songtao, GUO Yuwen, ZHANG Jianqiang

2009, 22(6): 968-974.

[Abstract](1312)

Abstract:
The pyrolysis characteristics and thermal decomposition products of waste computer mainboards were investigated by the TG-FTIR(thermogravimetric analyzer-Fourier transform infrared spectroscopy),a duct-furnace pyrolysis system and the GC-MS(gas chromatography-mass spectrometer).The results show that...

Search Advance Search

Journal Search

Search Type

NewsMore

instruction for authors

Read this journal

LinksMore

2009 Vol. 22, No. 6