西南交通大学学报

Temperature Control Strategy for Water-Cooled Proton Exchange Membrane Fuel Cells

CHEN Weirong, LI Yankun, LI Yan, ZHAO Xingqiang

2015, 28(3): 393-399. doi: 10.3969/j.issn.0258-2724.2015.03.001

[Abstract](1295)

[Cited By] (35)

Abstract:
An improved temperature control strategy by variation of air inlet pressure was proposed to solve the strong coupling problem that exists in the process of actual operation of a proton exchange membrane fuel cell (PEMFC) and to avoid the occurrence of instantaneous high temperature in the internal s...

Test Analysis and Modeling of Power Frequency Magnetic-Field Environment in Carbodies of Electrified Trains

ZHU Feng, LIU Guanghui, YE Jiaquan, DU Hui

2015, 28(3): 400-404. doi: 10.3969/j.issn.0258-2724.2015.03.002

[Abstract](1087)

[Cited By] (9)

Abstract:
In order to obtain the flux density and distribution characteristic of the power frequency magnetic field (PFMF) transmitted into the carbodies through windows of different electrified trains, the PFMF measurement data from high-speed, motor and ordinary cars were analyzed by GB/T24338 (Railway Appl...

Calculation Method for Rotor Slot Leakage Inductance of Virtual-Slot Short-Pitch Wave Winding

WANG Jianliang, LI Jinze, WU Bing, ZHANG Yihuang

2015, 28(3): 405-409. doi: 10.3969/j.issn.0258-2724.2015.03.003

[Abstract](902)

[Cited By] (1)

Abstract:
In order to calculate the slot leakage inductance of the virtual-slot short-pitch rotor winding in a doubly-fed induction generator (DFIG), the arrangement of a phase belt winding in the generator slot was studied from the structural principle of the virtual-slot short-pitch wave winding. Further, a...

Self-excited Vibration of Single-Magnet Suspension System: Stability Analysis and Inhibition

LI Songqi, ZHANG Kunlun

2015, 28(3): 410-416. doi: 10.3969/j.issn.0258-2724.2015.03.004

[Abstract](1283)

[Cited By] (19)

Abstract:
The self-excited vibration occurs due to mutual coupling between EMS maglev vehicles and the track. In order to study its effect on the safety and comfort of vehicles, a vehicle body-suspension frame-track dynamic model for single-magnet suspension systems was established. Using this model, the stab...

Speed-Sensorless Vector Control of Primary Cascaded Linear Induction Motor

MA Jiaqing, ZHOU Dajin, ZHAO Lifeng, ZHANG Yong, ZHAO Yong

2015, 28(3): 417-422. doi: 10.3969/j.issn.0258-2724.2015.03.005

[Abstract](1010)

[Cited By] (1)

Abstract:
For investigating the performance of constant and adaptive speed regulation of cascaded linear induction motor (LIM) in maglev system, a new speed-sensorless vector controller was designed based on the Maxwell equations by analyzing the relationship between the thrust of the LIM and the current vect...

Effect of Initial Damage on Fatigue Performance of Welded Joints

JIE Zhiyu, LI Yadong, WEI Xing

2015, 28(3): 423-427. doi: 10.3969/j.issn.0258-2724.2015.03.006

[Abstract](1220)

[Cited By] (6)

Abstract:
In order to investigate the effect of initial damage of a welded joint on its fatigue life and damage evolution, adopting the damage variable based on crack size from the damage mechanics, two common fatigue damage evolution models, the Chaboche model and the Lemaitre model, were used to discuss the...

Predominant Direction and Mechanism of Landslides Triggered by Lushan Earthquake

DUAN Shusu, YAO Lingkan, GUO Chenwen

2015, 28(3): 428-434. doi: 10.3969/j.issn.0258-2724.2015.03.007

[Abstract](1144)

[Cited By] (22)

Abstract:
Based on Lushan earthquake records, drainage systems and 1 754 earthquake-induced landslides, control factors of the directions of landslides triggered by earthquake were researched. The dominant direction of landslide number and the dominant aspect of natural slopes were compared; the direction of ...

Analytical Solutions of Earthquake Dynamic Responses of Trapezoid-Like Mountain

ZHANG Yingbin, YU Pengcheng, ZHAO Xingquan

2015, 28(3): 435-441. doi: 10.3969/j.issn.0258-2724.2015.03.008

[Abstract](1089)

[Cited By] (13)

Abstract:
In order to investigate the effect of earthquake loading on the dynamic responses of a mountain, a shear-beam model, an analytical method, for trapezoid-like mountains with two curved slopes was set up. The analytical solutions of the dynamic responses were obtained. A simplified empirical expressio...

Localization Method of Seismic Target in Anisotropic Ground

LU Zhiwen, DONG Dawei, HUA Chunrong, YAN Bing, XIE Xiao, CHEN Jun

2015, 28(3): 442-448. doi: 10.3969/j.issn.0258-2724.2015.03.009

[Abstract](873)

[Cited By] (9)

Abstract:
In order to solve the problem of low seismic target localization accuracy due to propagation speed variation in anisotropic ground, a novel target localization method was proposed based on the time difference of arrival (TDOA) from the time delay-equivalent propagation speed search table through tra...

Seismic Analysis Method of Deep-Water Bridge Pier and Water Coupling

LIU Lang, YANG Wanli, LI Qiao

2015, 28(3): 449-453. doi: 10.3969/j.issn.0258-2724.2015.03.010

[Abstract](1104)

[Cited By] (35)

Abstract:
To adopt a right method to calculate hydrodynamic pressure, a novel method, combining the Morison equation with CFD (computational fluid dynamics), for calculating the seismic responses of a deep-water bridge under pier-water coupling was proposed. The results based on the ANSYS-CFX model show that ...

Temperature Field Test of CRTS Ⅰ Twin-Block Ballastless Track in Winter

YANG Rongshan, WAN Zhangbo, LIU Xueyi, ZHANG Zhongwang, ZHAO Pingrui

2015, 28(3): 454-460. doi: 10.3969/j.issn.0258-2724.2015.03.011

[Abstract](1095)

[Cited By] (68)

Abstract:
In order to investigate the temperature distribution of ballastless track, the variation of track structure temperature field in different weather situations was analyzed from the temperature field monitoring of CRTSⅠtwin-block ballastless track in winter in Chengdu. Based on the mathematical statis...

Analysis-Oriented Stress-Strain Model of CFRP Confined Concrete with Preload

PAN Yi, WAN Li, WU Xiaofei

2015, 28(3): 461-465. doi: 10.3969/j.issn.0258-2724.2015.03.012

[Abstract](923)

[Cited By] (10)

Abstract:
In order to investigate the effect of preload ratio on the peak stress and peak strain of FRP (fiber reinforced plastics) confined concrete columns, based on the experimental analyses of 32 CFRP (carbon FRP) confined concrete circular columns and 16 CFRP confined square concrete columns, a preload f...

Improvement Measures for Layer Limits and Tie Column Settings in Masonry Structures

SU Qiwang, XU Hu, ZHAO Shichun, SONG Jirong

2015, 28(3): 466-471. doi: 10.3969/j.issn.0258-2724.2015.03.013

[Abstract](763)

[Cited By] (8)

Abstract:
In order to make up for some deficiencies in layer limits and tie column settings for brick masonry structures in seismic design code, where the provisions of layer limits and tie column settings are presented without considering the difference in wall area on a floor, an index of the ratio of wall ...

Extraction of Fluctuating Pressure on High-Speed Train Surface Based on Wavelet Transform

CHEN Chunjun, HE Hongyang, SHAO Yunlong

2015, 28(3): 472-477. doi: 10.3969/j.issn.0258-2724.2015.03.014

[Abstract](1097)

[Cited By] (12)

Abstract:
It is always the case that micro-piezoresistive pressure sensors are affected by some interference signals during the process of measuring the high-speed trains' surface pressure, which makes signal to noise ratio (SNR) of the fluctuating pressure low. In order to extract the fluctuating pressure ef...

Analysis of Network Security for Chinese High-Speed Railway Signal Systems and Proposal of Unified Security Control

LI Saifei, YAN Lianshan, GUO Wei, GUO Jin, CHEN Jianyi, PAN Wei, FANG Xuming

2015, 28(3): 478-484,503. doi: 10.3969/j.issn.0258-2724.2015.03.015

[Abstract](1577)

[Cited By] (45)

Abstract:
In order to ensure the network security of China's high-speed railway signal system, the network security issues including the central traffic control (CTC) system, train control system, centralized signal monitoring system and the GSM-R system were analyzed generally. Subsequently a unified network...

New Mathematical Model for GNSS Relative Positioning Resolving

ZHANG Xi, HUANG Dingfa, LIAO Hua, FENG Wei

2015, 28(3): 485-489. doi: 10.3969/j.issn.0258-2724.2015.03.016

[Abstract](824)

[Cited By] (9)

Abstract:
In order to overcome the problem of the traditional model, a new model was proposed for relative positioning resolving of global navigation satellite system (GNSS). With the coordinates of reference station known in advance, this model is different from the traditional model that its coefficient mat...

An Improved SIFT Algorithm for Image Stereo Matching

LI Dan, SUN Haitao, WANG Haili

2015, 28(3): 490-496. doi: 10.3969/j.issn.0258-2724.2015.03.017

[Abstract](1509)

[Cited By] (31)

Abstract:
The high complexity and long computing time of SIFT (scale invariant feature transform) algorithm affect the real-time ability of stereo matching. To solve this problem, an improved feature-points matching algorithm of stereo vision was proposed. The SIFT algorithm was improved in two aspects. First...

A Map-Matching Algorithm Based on Improved AOE Network for Low Frequency Floating Car Data

SHEN Jingwei, ZHOU Tinggang, ZHANG Hongtao

2015, 28(3): 497-503. doi: 10.3969/j.issn.0258-2724.2015.03.018

[Abstract](1121)

[Cited By] (16)

Abstract:
Due to the long time interval characteristic, the existing map-matching algorithms are not suitable for the low-frequency FCD (floating car data). By analyzing local map-matching algorithms and global map-matching algorithms, and overall considering the FCD trace, a map-matching algorithm for low-fr...

Effects of In-vehicle Information on Driver Eye Blink Duration and Workload

ZHU Tong, WU Ling, LU Qiaozhen

2015, 28(3): 504-510. doi: 10.3969/j.issn.0258-2724.2015.03.019

[Abstract](1348)

[Cited By] (29)

Abstract:
A real-vehicle experiment was conducted to study the effects of in-vehicle information systems on driver workload. Data of driver blink duration and frequency were collected with in-vehicle equipment mounted at three different positions. Driver blinking characteristics were studied for the navigatio...

Time-Varying Signal Compression Technology Based on Compressed Sensing

GUO Liang, GAO Hongli, HUANG Haifeng, ZHANG Xiaochen

2015, 28(3): 511-516. doi: 10.3969/j.issn.0258-2724.2015.03.020

[Abstract](1119)

[Cited By] (13)

Abstract:
Data compression and de-noise play important roles in the real-time storage and remote transmission of vibration signal for the on-line monitoring and fault diagnosis of mechanical equipments. By analyzing the time-varying characteristics of vibration signals, the sparse transfer matrix and compress...

Topic Link Detection Method Based on Semantic Similarity

ZHAI Donghai, CUI Jingjing, NIE Hongyu, DU Jia

2015, 28(3): 517-522. doi: 10.3969/j.issn.0258-2724.2015.03.021

[Abstract](908)

[Cited By] (7)

Abstract:
To effectively judge the similarity between the topics of any two of stories, a topic link detection method was proposed on the basis of semantic similarity. First, the relative entropy between the feature words in two stories was calculated to work as the semantic similarity. Furthermore, the relev...

Prediction Model for Octane Number and Component Proportions of Gasoline Surrogate Fuel

ZHENG Zhaolei, QIN Yanxin

2015, 28(3): 523-528,549. doi: 10.3969/j.issn.0258-2724.2015.03.022

[Abstract](906)

[Cited By] (4)

Abstract:
The response surface method (RSM) was used to build models for predicting the octane number and determining the component proportions of a gasoline surrogate fuel, which is synthesized using toluene, is-octane and n-heptane and referred to as toluene reference fuel (TRF). The models, including the f...

Impact of Curbside Parking on Bicycle Lane Capacity

YE Xiaofei, DENG Shejun, CHEN Jun, ZHENG Jingheng

2015, 28(3): 529-535. doi: 10.3969/j.issn.0258-2724.2015.03.023

[Abstract](1168)

[Cited By] (39)

Abstract:
In order to provide a theoretical basis for optimization and setting of the curbside parking on bicycle lanes, the traffic conflict technique was used to analyze the effect of curbside parking on the bicycle flow in segregated bicycle lane and establish a basic capacity model under the influence of ...

Human Performance in Vessel Passages Based on Improved TOPSIS Method

LIAO Quanmi, HUANG Sheng, WANG Yu, LI Xiang

2015, 28(3): 536-542. doi: 10.3969/j.issn.0258-2724.2015.03.024

[Abstract](844)

[Cited By] (11)

Abstract:
To deal with the lack of design basis of passages during the initial vessel design, an evaluation index system of accessibility that is based on human factors engineering was built according to the feature of interaction between passage design and crew operation. An improved TOPSIS method was propos...

Optimal Intermodal Transport Path Planning Based on Martins Algorithm

LIN Feng

2015, 28(3): 543-549. doi: 10.3969/j.issn.0258-2724.2015.03.025

[Abstract](1059)

[Cited By] (23)

Abstract:
In order to select optimal paths quickly and efficiently, a multi-objective multimodal multi-commodity routing model with time windows was proposed on the basis of the existing model. A two-layer search algorithm was designed to solve the model. In the first layer, a revised Martins label setting al...

Business Model-Driven Ontology Knowledge Representation and Application for Emergency Logistics

ZHANG Li, WANG Qianzhu, NING Yahui, JIANG Dali

2015, 28(3): 550-556. doi: 10.3969/j.issn.0258-2724.2015.03.026

[Abstract](889)

[Cited By] (5)

Abstract:
To solve the problem of heterogeneous information integration and knowledge management in the emergency logistics intelligent collaboration, aiming at the effective knowledge application, an ontology modeling method was proposed by utilizing the internal mapping of components and the business infere...

Game-Based Analysis on Motive of Regional Air Route Cooperation

WANG Kun, ZHU Jinfu, ZHU Xinghui

2015, 28(3): 557-561. doi: 10.3969/j.issn.0258-2724.2015.03.027

[Abstract](840)

[Cited By] (10)

Abstract:
Since the independent regional air route operates at a low level of profitability because of small transport volume and high operation cost, the BERTRAND game model was used to analyze the effect of the cooperation of the regional air route with branch air route on its operating profit from the poin...

Forecast Method for Medium-Long Term Air Traffic Flow Considering Periodic Fluctuation Factors

CHEN Dan, HU Minghua, ZHANG Honghai, YIN Jianan

2015, 28(3): 562-568. doi: 10.3969/j.issn.0258-2724.2015.03.028

[Abstract](1188)

[Cited By] (16)

Abstract:
To accurately characterize the trend and periodic fluctuation of the future traffic demand in a specific airspace unit, an improved dynamic linear model that is based on the linear growth model was developed to forecast the medium-long term air traffic flow, by taking into full account periodic fluc...

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2015 Vol. 28, No. 3