西南交通大学学报

Integrated Wind Speed Standard for Long-Span Bridges over Deep-Cutting Gorge

LI Yongle, TANG Kang, CAI Xiantang, LIAO Haili

2010, 23(2): 167-173. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1903)

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To consider the difference of wind characteristics for different members of a long-span bridge in complex terrains, the basic wind speed for the region was calculated on the basis of the statistical analysis of historical observation records of wind speed from meteorological stations involved. From ...

Safety Appraisement of Existing Structures Based on Pushover Method

PAN Yi, 2, YANG Cheng, ZHAO Shichun, 2　LIN Yongjun, DAI Jie

2010, 23(2): 174-178. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1421)

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In order to evaluate the safety of existing structures accurately, based on the method of performance-based seismic design and by combining with the national codes Standard for Appraiser of Reliability of Civil Building and Criteria for the Classification of the Buildings'Seismic Damage Ranks, the p...

Numerical Simulation of Aseismatic Behavior of Retrofitted Masonry-Timber Structure of Jushi Building on Qingcheng Mountain

YU Zhixiang, ZHAO Shichun, WU Hao

2010, 23(2): 179-185. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1538)

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An investigation was carried out on the Jushi building being retrofitted in the Shangqing Temple on the Qingcheng Mountain in order to research the retrofitting measures of religious buildings. The FEM (finite element method) was adopted to set up the numerical model of this ancient building by taki...

Remote Sensing Dynamic Monitoring and Driving Force Analysis of Land Use / Cover Changes in Chengdu

YANG Wunian, 2, LIU Enqin, CHEN Ning, LIAO Chonggao, 3

2010, 23(2): 185-190. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1504)

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To explore variation in the structure of land use/ land cover in Chengdu City due to the rapid development of urban construction in the past approximate 30 years, changes of its land use were dynamically monitored with its Landsat MSS and TM satellite remote sensing images in the years 1978 1992, 20...

Random Vibration Property of High-Speed Railway Vehicle in Passenger Dedicated Line

LI Bin, 2, LIU Xueyi

2010, 23(2): 191-196. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1645)

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To investigate the vibration regularity of a railway vehicle under track irregularity in a passenger dedicated line ( PDL), a concept of artificial short wave of track irregularity was put forward, and a sample of the artificial short wave was given. Vertical irregularity and cross-level irregularit...

Seismic Deformation and Failure Modes and Mechanism of Soil Mass

WANG Jian, YAO Lingkan, JIANG Liangwei

2010, 23(2): 196-202. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1479)

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To study the seismic deformation effect of soil mass, a field investigation on slopes reinforced by shotcrete-bolt system and road embankments along Dujiangyan to Yingxiu highway was conducted. The investigation shows that the seismic deformation and failure modes of soil mass laterally unrestrained...

Effect of Unsupported Sleepers on Sleeper Dynamic Response

ZHANG Jian, WU Changhua, XIAO Xinbiao, WEN Zefeng, JIN Xuesong

2010, 23(2): 203-208. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1455)

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A vertical vehicle-track coupling dynamic model was established to analyze the effect of different unsupported sleeper situations on the sleeper dynamic response in the vertical direction. In the model, the vehicle is treated as a multi-rigid-body system, and the rails are assumed to be Euler beams ...

Influences of Traction Motor Vibration on Bogie Frame Fatigue Strength

AN Qi, LI Fu, FU Maohai

2010, 23(2): 209-212. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1831)

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To analysis the causes of fatigue failure on the area around the traction motor seat of metro vehicle power bogie frames, the fatigue strength of the frame was calculated by using FEM. The calculated results show that the stresses on the area around the traction motor seat are mainly influenced by t...

Experimental Study on Spray Characteristics and Fire Suppression Performance of Pressure Swirl Nozzle

LIU Zhichao, 2, YU Minggao, ZHENG Ligang

2010, 23(2): 213-217. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](962)

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A pressure swirl nozzle for water mist fire suppression was developed and experimentally studied to optimize the parameters of the nozzle. The influences of the design parameters, the operating pressure, and the additive to plain water on spray characteristics were also investigated. The results sho...

CNG Direct Injection Engine Control Based on Rapid Control Prototype Technique

PENG Yiqiang, LI Wei, 2, LI Jingbo

2010, 23(2): 218-221. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](972)

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To improve the performance of compressed natural gas (CNG) engines, CNG in-cylinder direct injection was implemented with a rapid control prototype ( RCP) technique. According to application requirements, the flow characteristics of the direct injector was tested, a gas supply system for the CNG dir...

Theoretical Study on Real Tooth Surface of Non-backlash Double-Roller Enveloping Hourglass Worm

DENG Xing-Qiao, WANG Jin-Ge, ZHANG Jun-Fu, WU Jiang

2010, 23(2): 222-226. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](924)

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To acquire the real tooth surface of the non-backlash double-roller enveloping hourglass worm, a mathematic model for the non-backlash double-roller enveloping hourglass worm gearing was established according to the space meshing theory, in which the contact helix line equation of the worm gearing w...

Effects of Si Concentration on Microstructure of Si Steel Thin Strips Prepared by Twin Roll Continuous Casting

YI Yu, ZHOU Zehua, WANG Zehua, JIANG Shaoqun

2010, 23(2): 227-232. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](947)

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The effects of Si concentration on microstructure of Si steel thin strips prepared by twin roll continuous casting were investigated with optical microscopy, transmission electron microscopy and energy spectrum analysis to provide a theoretical and technological reference for post treatment procedur...

Detection of Backside Vehicle on Freeway in Daytime on Freeway in the Daytime

JIN Lisheng, JIA Min, SUN Yuqin, HOU Haijing

2010, 23(2): 231-237. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1114)

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A method for detection of backside vehicle on freeway in daytime was proposed to help the driver check the existence of backside vehicles in the target lane, especially those in the blind zones, and to reduce traffic accidents during lane changing. The road images are classified into two categories:...

New Prediction Method of Operating Speed and Its Application to Highway Alignment Evaluation

XU Jin, PENG Qiyuan, SHAO Yiming, ZHAO Jun

2010, 23(2): 238-248. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1135)

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To predict operating speed in highway design phase and ensure the coordination ofalignment elements, models of lateral to lerated acceleration, longitudinal acceleration and deceleration, brake attenuation, environment speed concerned highway alignment were developed to determine the desired speed a...

Auction Algorithm for Shortest Paths in Road Networks Considering Delays for Intersection Movements

DU Mu-Jing, CHENG Lin

2010, 23(2): 249-254. doi: 10. 3969/ j. issn. 025-2724. 2

[Abstract](1227)

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In order to overcome the deficiencies that traditional algorithms for solving the shortest path problems spend large computing costs and are unable to consider the turning delays at intersections, an improved auction algorithm that can directly find out the shortest path between two nodes in restric...

Reserve Capacity Model for Urban Road Network with Variable Lanes

ZHANG Feng, LI Wen-Quan, CHANG Yu-Lin

2010, 23(2): 255-260. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1184)

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To study the influence of lane allocation on road network capacity, a bi-level programming model of network reserve capacity was established by allocating lane numbers in both directions of two-way roads and setting traffic signal-timing parameters at individual intersections. The upper-level proble...

Robust Optimization of Aircraft Arrival and Departure Flow Allocation Based on Dynamic Capacity

YANG Chang-Wen, HU Meng-Hua

2010, 23(2): 261-267. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1562)

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To optimize the allocation of aircraft arrival and departure flow under dynamic capacity of airports and fixes, an absolute robust optimization model, a deviation robust optimization model, and a relative robust optimization model were built, where the objective function is to minimize the total cos...

Two-Stage FFH / MFSK System Based on Frequency Hopping Sequence with No-Hit Zone

YIE Wen-Xia, FAN Peng-Zhi, HAO Li

2010, 23(2): 268-273. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1034)

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To improve system capacity, a two-stage FFH/ MFSK (fast frequency hopping/ multilevel frequency-shift-keying) system based on frequency hopping sequence with no-hit zone (NHZ), named as NHZ/ FFH system, was proposed. In this system, users are divided into a number of groups, and each group is assign...

Takagi-Sugeno Fuzzy State Observer for Induction Motor

JIANG Lin, 2, XIAO Jian, WANG Tao

2010, 23(2): 273-277. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1072)

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To solve the instability problem of traditional adaptive flux observer for IM (induction motor) working at low speed generating mode, a new state observer was proposed based on T- (Takagi-Sugeno) fuzzy model. In the observer, the fifth-order nonlinear time-varying model for IM is used to observe mag...

SiC CMOS OPAMP High Temperature Model and Hspice Simulation

YANG Yin-Tang, LIU Li

2010, 23(2): 278-283. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1161)

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The high temperature equivalent circuit of standard silicon carbide ( SiC) CMOS (complementary metal-oxide-semiconductor) OPAMP (operational amplifier) with PMOST (P-type metal-oxide-semiconductor transistor) as input was drawn and its Hspice simulation was conducted to provide a foundation to furth...

Reliability and Power Consumption Optimization for SoC

ZHANG Xiao-Lin, YANG Gen-Qiang, ZHANG Yu-Ning

2010, 23(2): 284-289. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1273)

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Tradeoff between the high reliability and low power consumption for SoC (system on a chip) was investigated. Based on the proposed reliability and power consumption characterization model, reliability-aware and low-power design was illustrated as a design methodology to balance reliability enhanceme...

Radar Emitter Signal Recognition Based on WRFCCF

YU Zhibin, JIN Weidong, CHEN Chunxia

2010, 23(2): 290-295. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1215)

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In order to identify the advanced radar emitter signals (RES), an automatic recognition approach of signals was proposed. This approach is based on the cascade-feature of the wavelet ridge- frequency (WRF). The new wavelet atom and the detection strategy are used to extract the WRF feature of the RE...

Divisive Hierarchical Clustering Algorithm Based on Grey Relational Measure

CHEN Tao-Wei, JIN Wei-Dong, LI Jie

2010, 23(2): 296-301. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1254)

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To estimate cluster number and achieve a better clustering performance, a divisive hierarchical clustering algorithm based on grey relational measure was proposed. In this algorithm, the grey relational measure is used to measure the degree of similarity between data sets. On the basis of the way of...

Key Search Quantum Circuit Design of AES Cipher

YE Feng, YUAN Jia-Bin

2010, 23(2): 302-307. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1069)

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In order to verify the feasibility of applying the quantum search to the key search of block ciphers, a key search quantum circuit of AES (advanced encryption standard) cipher was designed, including KeyExpansion module, encryption module and comparison module, based on the analyses of its computati...

Alternative Ranking Based on Fuzzy Similarityin Group Decision-Making

GUO Qiang, GUO Yaohuang, GUO Chunxiang

2010, 23(2): 307-311. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1206)

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It is difficult to rank alternatives in group decision-making because of multi-attributes,limitations to policy-makers in their understanding of matter under discussion, and contradiction in the decision-makers. To solve this problem, fuzzy similarity was introduced to measure the preference differe...

Decision Tree Construction Based on Cloud Transform and Rough Set Theory under Characteristic Relation

SONG Jing, CU Jian-Huai

2010, 23(2): 312-316. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1112)

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A new algorithm, DTCCRSCR (decision tree construction based on cloud transform and rough set theory under characteristic relation), was proposed for mining classification knowledge from incomplete information systems. It utilizes cloud transform to discretize continuous data, and then the attribute ...

Characteristics of Heavy Metals in Semi-aerobic Landfill Leachate

YANG Qiao-Yan, LIU Dan, LI Qi-Ban, CHA Kun

2010, 23(2): 317-323. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1138)

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To raise the removal rates of heavy metals in leachate, pilot-scale experiments of semi- aerobic landfill were carried out, the factors influencing the characteristics of heavy metals in semi- aerobic landfill leachate, such as pH value, ammonia nitrogen and dissolved oxygen (DO), were investigated....

Stream Line Optimization Model with Matching Degree between Logistics Supply and Demand as Objective Function

ZHANG Jin, WANG Kun

2010, 23(2): 324-330. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](2083)

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To reveal the basic laws and characteristics of logistics activities, a stream line network structure with multi-layer, multi-stage, and multi-attribute was proposed based on the reationship between logistics supply and demand, and the mathematical description was presented. Three kinds of degradati...

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2010 Vol. 23, No. 2