西南交通大学学报

Development Strategy and Single-Layer User-Data Switching Platform Architecture for Next Generation Internet

ZENG Hua-Shen, CHEN Xi

2011, 24(6): 889-899. doi: 10.3969/j.issn.0258-2724.2011.06.001

[Abstract](1177)

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Abstract:
Based on researches on NGI (next generation internet) architecture and its related techniques carried out by Sichuan Network Communication Technology Key Laboratory, NGI development strategy and its architecture were discussed comprehensively. The emphasis was given to NGI framework at the laborator...

Optimization of Kernel Parameters Based on Third-Order Rényi Entropy

FENG Chao, YUAN Chao-Wei

2011, 24(6): 899-903. doi: 10.3969/j.issn.0258-2724.2011.06.002

[Abstract](962)

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Abstract:
In order to obtain an optimal tradeoff between cross-term reduction and high time-frequency concentration in time-frequency distribution of Cohen's class, an optimization algorithm of kernel parameters based on third-order Rényi entropy was proposed. From the asymptotic cross term invariance of thir...

Blind Estimation of Symbol Rates of Multi-component Phase-Shift Keying Signals

YU Ning-Yu, MA Gong-Guang, , SHI , Rong

2011, 24(6): 904-909. doi: 10.3969/j.issn.0258-2724.2011.06.003

[Abstract](982)

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Abstract:
To solve the parameter estimation problem of multi-component phase-shift keying (PSK) signals intercepted simultaneously by a single-channel receiver in the same bandwidth, a new blind estimation algorithm was proposed. With this algorithm, blind signal separation is avoided and the symbol rate of e...

Face Recognition Method Combining 2DLPP with 2DPCA

JI Yong-Feng, HUO Yuan-Lian

2011, 24(6): 910-916. doi: 10.3969/j.issn.0258-2724.2011.06.004

[Abstract](1237)

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Abstract:
In order to overcome the limitation that two-dimensional locality preserving projection (2DLPP) needs more data to represent face features, a new method, named two-dimensional locality preserving projection-principal component analysis (2DLPP-PCA), was proposed. By simultaneously considering 2DLPP a...

Interval Type-2 Fuzzy Logic System Based on Multi-resolution Analysis

DING Wei, HUANG Jing-Chun

2011, 24(6) doi: 10.3969/j.issn.0258-2724.2011.06.005

[Abstract](2160)

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Abstract:
In order to effectively express and deal with the uncertainty of systems, an interval type-2 fuzzy logic system based on multi-resolution analysis was proposed, and a multi-resolution interval type-2 membership function was constructed. In addition, its structure and learning algorithm were given ba...

Improved Arc-Length Method for Solving Buckling Problem

ZHOU Ling-Yuan, LI Jiao, LI Tong-Mei

2011, 24(6): 922-925. doi: 10.3969/j.issn.0258-2724.2011.06.005

[Abstract](1296)

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Abstract:
A modified arc-length method was proposed to solve the problem that the traditional Newton-Raphson method fails in nonlinear finite element analysis on structures with buckling in the structure or softening in the material. The unbalanced load vector in the nonlinear equations is decomposed into two...

Two-StageDamageDetectionMethodBasedon ImprovedParticleSwarm OptimizationAlgorithm

GUO Hui-Yong, WANG Lei, LI Zheng-Liang

2011, 24(6): 926-932.

[Abstract](1411)

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Abstract:
In orderto solvestructural multi-damageidentification problem,atwo-stage identificationmethodbasedontheparticleswarm optimization (PSO)algorithm andthe Bayesiantheorywasproposed.Inthismethod,structuralmodalstrainenergy (MSE)and frequencyareconsideredastwoinformationsources,andthe methodsbasedonfrequ...

Experimental Research on Load-Bearing Capacity of Fire-Damaged Reinforced Concrete Continuous T-Beams

XIANG Kai, WANG Guo-Hui

2011, 24(6): 933-939. doi: 10.3969/j.issn.0258-2724.2011.06.008

[Abstract](1463)

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Abstract:
In order to research the effects of heating and cooling on the load-bearing capacity of fire-damaged reinforced concrete (RC) continuous beams, loading tests of three RC continuous T-beams were conducted. A parametric analysis for the load-bearing capacity of fire-damaged RC continuous beams were ca...

Fatigue Performance of Anchorage Zone for Long-Span Single Pylon Cable-Stayed Bridge

WEI Xing, JIANG Shi-Zhong

2011, 24(6): 940-945. doi: 10.3969/j.issn.0258-2724.2011.06.009

[Abstract](1520)

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Abstract:
In order to investigate the fatigue performance of a new cable-to-girder anchorage in a cable-stayed bridge with steel box girder, different force transfer paths and mechanic behaviors of two types of anchorages connecting anchor-plate with web of box girder or anchor-plate with top plate of box gir...

Hysteresis Characteristics of Shear Friction Damper with Two Resistances and Displacements

ZHANG Peng-Bo, BO Yi, DIAO Shi-Chun

2011, 24(6): 946-952. doi: 10.3969/j.issn.0258-2724.2011.06.010

[Abstract](1025)

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Abstract:
A shear friction damper with two resistances and displacements was designed to improve the safety and comfort of a building under different horizontal loads. Pseudo-dynamic loading experiment was conducted on 4 full-scale damper assemblies with different loading procedures. The resistances of the da...

WebGIS-Based Safety Risk Management System of Underground Engineering

CHOU Wen-Ge, LI Jun-Song, HU Lan

2011, 24(6): 953-960. doi: 10.3969/j.issn.0258-2724.2011.06.011

[Abstract](1095)

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Abstract:
To solve the problem of dynamical safety risk assessment and management during the construction period of an underground project, a risk index system was developed based on the analysis of safety risks at this stage. By considering close-spaced impact, a method to assess the safety risks was given, ...

SHPB Experiment of Dynamic Mechanical Behaviorof Compacted Clay

LIU Dun-Xin, CHEN Zhong-Fu, XU Wei-Fang

2011, 24(6): 960-965. doi: 10.3969/j.issn.0258-2724.2011.06.012

[Abstract](1109)

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Abstract:
Because of soils' low wave velocity and impedance and large deformation, it is unable to obtain their reliable and accurate dynamic stress-strain curves with a conventional SHPB (split Hopkinson pressure bar) experimental device. To investigate the compressive mechanic properties of compacted clays ...

Application Condition of Point Safety Factor Method for Stability Analysis of Landslide

YANG Tao, MA Hui-Min, DAI Jie

2011, 24(6): 966-972. doi: 10.3969/j.issn.0258-2724.2011.06.013

[Abstract](1186)

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Abstract:
To determine the landslide stage for suitable application of the point safety factor method, calculational results obtained using this method and the rigid-body limit equilibrium method were analyzed and compared, and factors influencing point safety factor were analyzed. The results show that the b...

Three-Dimensional Visualization of Arsenic Aggregates in Porous Media

BANG Dao-Beng, HUANG Chao, Aaron PACKMAN

2011, 24(6): 973-978. doi: 10.3969/j.issn.0258-2724.2011.06.014

[Abstract](1050)

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Abstract:
In order to investigate the change of internal structure of porous media caused by arsenic deposition, the X-ray difference micro-tomography was used to characterize the distribution of arsenic aggregates in porous media by scanning arsenic samples prepared in the laboratory and arsenic-rich fluvial...

Influence of Additional Stiffness of Traction Bar on Vertical Dynamic Performance of Subway Vehicles

MA Wei-Hua, LUO Shi-Hui, SONG Rong-Rong

2011, 24(6): 979-982. doi: 10.3969/j.issn.0258-2724.2011.06.015

[Abstract](1276)

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Abstract:
To solve the wheel wear problems of the subway vehicles such as wheel tread wear, spalling, wheel out of round, and the problem that the vertical vibration of car body and the vertical ride index exceed the standard values, the additional stiffness function of the traction bar was studied through th...

Fast Intersection Algorithm between Spatial Triangle Pairs

ZHOU Yi-Sheng, DING Guo-Fu, HE Yong

2011, 24(6): 984-988. doi: 10.3969/j.issn.0258-2724.2011.06.016

[Abstract](1112)

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Abstract:
To improve the collision detection efficiency, a fast triangle-triangle intersection detection algorithm was proposed, which is based on the principle of accurate intersection calculation between edges of different triangles. In the algorithm, the linear dependence of edge vectors of triangles, proj...

Wind-Induced Security of High-Speed Trains on the Ground

XU Meng-Ge, ZHANG Ji-Ye, ZHANG Wei-Hua

2011, 24(6): 989-995. doi: 10.3969/j.issn.0258-2724.2011.06.017

[Abstract](1391)

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In order to study the running security of high-speed trains under strong crosswinds, an aerodynamic model and a vehicle system dynamic model for computing the wind-induced vibration of the high-speed trains were established based on the theories of aerodynamics and multi-body system dynamics. With t...

Numerical Analysis of Aerodynamic Dipole Source on High-Speed Train Surface

ZHENG Zheng-Yu, LI Ren-Xian

2011, 24(6): 996-1002. doi: 10.3969/j.issn.0258-2724.2011.06.018

[Abstract](1251)

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Abstract:
Based on the Lighthill's acoustic equation, the boundary element method (BEM) combined with the computational fluid dynamics (CFD) was utilized to achieve the distribution of aerodynamic dipole source on high-speed train surface. The strength and distribution of the aerodynamic dipole source under d...

Rapid Collision Detection Based on OBB Algorithm and Penetration Avoidance Mechanism

WANG Pei-Dun, WANG Wen-Jing, CHEN Feng

2011, 24(6): 1003-1008. doi: 10.3969/j.issn.0258-2724.2011.06.019

[Abstract](1152)

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A new penetration avoidance mechanism based on forward prevention was proposed to improve the real time performance and reality of collision detection in virtual assembly systems. In virtual assembly manipulation, grasp and release of virtual objects and penetration avoidance were implemented using ...

Experimental Research on Tail Rudder Efficiency of Super-Cavitaion Vehicle

FEI Xuan, ZHANG Yu-Wen, DENG Fei

2011, 24(6): 1008-1013. doi: 10.3969/j.issn.0258-2724.2011.06.020

[Abstract](1160)

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In order to acquire the input conditions of super-cavitaion vehicle control trajectory and overall design, a scaled model experiment on tail rudder was carried out to investigate the generation of ventilated supercavity and the dynamics characteristics of tail rudder angle of an underwater vehicle. ...

Distribution Characteristics of Falling Film Thickness around Horizontal Tube and Its Influences on Heat Transfer

HOU Hao, BI Qi-Cheng, MA Gong

2011, 24(6): 1013-1018. doi: 10.3969/j.issn.0258-2724.2011.06.021

[Abstract](1023)

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Abstract:
According to the physical characteristics of gas-liquid interfaces, the film thickness on the perimeter of a horizontal tube was experimentally studied by a conductance probe method to understand the flow behavior of a falling film. Measurements were conducted under the following conditions: outside...

Occlusion and Duplicate Setting of Roadside Traffic Signs for Ordinary Multilane Highways

LIU Jian, JIANG Jun, XIE Hai-Fei

2011, 24(6): 1019-1024. doi: 10.3969/j.issn.0258-2724.2011.06.022

[Abstract](1235)

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Abstract:
Heavy vehicles account for a large proportion on ordinary highways. In order to solve the occlusion problem that heavy vehicles shelter roadside traffic signs, an analysis was made for the sign recognition process of car drivers at the median lane being occluded by heavy vehicles at the outside lane...

Regional Emergency Logistics Network Design Based on Reliability Analysis

CHEN Jian, YAN Qi-Peng, HE Ya-Min

2011, 24(6): 1025-1031. doi: 10.3969/j.issn.0258-2724.2011.06.023

[Abstract](1682)

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Abstract:
A bi-level programming model for network design of regional emergency logistics was formulated for the network to survive in natural disasters and to meet the needs of emergency supplies. There are two objectives in the upper programming model: a shortest total logistics time and maximum connectivit...

Conflict Avoidance Oriented Airport Surface Aircraft Taxiing Guidance Method

SHANG Xin-Min, AN Hong-Feng, WANG Chong

2011, 24(6): 1032-1039. doi: 10.3969/j.issn.0258-2724.2011.06.024

[Abstract](1015)

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To avoid confliction troubles between aircrafts at high density airports, an aircraft taxiing guidance framework based on hybrid system is proposed. Firstly, an aircraft taxiing dynamic model in continuous space and discrete event dynamic system models for the taxiing operation on straightaway and i...

Simulation of Aircraft Flight Track by BéZier and B-spline Curve

LI Xin-Qing, LAN Shi-Yong, LI Gang

2011, 24(6): 1040-1045. doi: 10.3969/j.issn.0258-2724.2011.06.025

[Abstract](1410)

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Abstract:
To overcome the limitations of motion equation which can not control the curve shape of aircraft tracks, a method of track simulation by Bézier and B-spline curves was proposed since the civil aircrafts have regular flying rules and its motion follows the beacons in flight plan defined before flight...

Modeling and Simulation of Fleet Planning for Liner Shipping

YANG Qiu-Beng, XIE Xin-Lian, FEI Guang-Dan

2011, 24(6): 1046-1054. doi: 10.3969/j.issn.0258-2724.2011.06.026

[Abstract](1302)

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Abstract:
In order to improve and optimize a liner shipping system and to meet the requirements of liner service with fixed schedules, a mixed-integer nonlinear model for fleet planning was established based on the multi-call liner route pattern. The objective of the model is to maximize the discounted cash f...

Supply Chain Postponement Strategy Model for Mass Customization

ZHANG Min, CHENG Wen-Meng, ZHANG Ze-Jiang

2011, 24(6): 1055-1059. doi: 10.3969/j.issn.0258-2724.2011.06.027

[Abstract](849)

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Abstract:
In order to bring the overall efficiency of supply chain into full play and provide the best production strategy for manufacturers, the cost relationships in general stage and customized stage are analyzed, and a supply chain postponement strategy model aimed at the minimum total cost of manufacture...

Effect of Diameter of Leachate Drainage Pipeline on Operation of Simulated Semi-aerobic Landfill with Leachate Recirculation

YANG Hong-Wei, YANG Xiao-Dong, LIU Dan

2011, 24(6): 1060-1066. doi: 10.3969/j.issn.0258-2724.2011.06.028

[Abstract](1031)

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Abstract:
In order to study the effect of the diameter of leachate drainage pipeline on operational characteristics of semi-aerobic landfills, three simulated semi-aerobic landfills with leachate recirculation were constructed in laboratory using different diameters (80, 50, and 25 mm) of leachate drainage pi...

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2011 Vol. 24, No. 6