西南交通大学学报

Dynamic Analysis of Key Design Parameters for Ballastless Track of High-Speed Railway

CAI Cheng-Biao, XU Peng

2010, 23(4): 493-497. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1790)

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Abstract:
The key design parameters for ballastless track of high-speed railway were analyzed using the theory of train-track coupled dynamics. The parameters under study include the design wheel load, wheel load for fatigue check, track stiffness, supporting stiffness of subgrade in the subgrade-bridge trans...

Dynamic Frequencies and Complex Modal Motion of Mass-Spring-Damping Rotating System

LIU Zhan-Fang, ZHANG Kai, YAN Shi-Jun

2010, 23(4): 498-501. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](805)

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In order to provide a basis for researching the dynamic behavior of engineering structures in a centrifugal and vibration compound environment, dynamic equations for a mass-spring-damping rotating system with two degrees-of-freedom were set up, and the eigenfrequencies and complex modal vectors of t...

Model Experiment of Construction Process of Long-Span Steel Truss Bridge

FAN Liang, GONG Chang-Long, CHEN Si-Tian

2010, 23(4): 502-507. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1638)

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To probe into the mechanical behavior of the main construction stage of Chaotianmen Yangtze River bridge and enhance its safety during the construction, a model test with a scale ratio of 1 to 40 was carried out to whole simulate the construction processes of this bridge. The construction technologi...

Calculation Method of Bending Crack Width in RC Beams Strengthened by Bonding Steel Plate

SHAN Cheng-Lin

2010, 23(4): 508-513. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1160)

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In order to control the bending crack width of reinforced concrete ( RC ) beams strengthened by bonding steel plate, the crack generation mechanism before and after reinforcement was analyzed. The developing behavior of cracks was investigated through the whole loading process of six simply-supporte...

Experimental Investigation of Wedge-Anchor Parameters for CFRP Tendons

CHUge Ping, QIANG Shi-Zhong, HOU Su-Wei

2010, 23(4): 514-520. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1049)

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In order to apply carbon fiber reinforced plastics (CFRP) tendon to bridge engineering,a wedge-anchor system for CFRP tendons was designed and tested. This system consists of one metal sleeve, four steel wedges and one steel barrel. Orthogonal tests of wedge-anchor parameters were conducted to inves...

Seismic Dynamic Responses of Plane Sliding Rock Slope

LUO Gang, HU Xie-Wen, ZHANG Yao

2010, 23(4): 521-526. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1186)

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In order to investigate the stability-loss mechanism of a cataclinal rock slope under earthquake loading, the fatigue strength theory was used to investigate the changes of its mechanical properties under the action of the loading. Seismic waves were simplified as elastic waves to generate equivalen...

Problems about Engineering Geology of High-Grade Railway Route Selection in Complicated Mountainous Areas

WU Guang, XIAO Dao-Tan, JIANG Liang-Wen, QU Ke

2010, 23(4): 527-532. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1203)

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In order to scientifically carry out high-grade railway route selection in complicated mountainous areas, some major engineering geological problems in railway route selection were put forward. These problems are the gravitational process and movement of substance in high-mountain gorge areas, the c...

Digital Processing of Unmanned Aerial Vehicle Image and Its Application in Reconstruction of Wenchuan Earthquake-Hit Areas

LU Heng, LI Yong-Shu, LI He-Chao, HE Jing, REN Zhi-Ming

2010, 23(4): 533-538. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1258)

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In order to solve the difficulty in real-time acquisition of remote sensing data in multi-cloud regions, acquisition and digital processing methods of UAV (unmanned aerial vehicle) remote sensing images were discussed on the basis of the characteristics of high image resolution and good flexibility ...

Improved Collaborative Optimization Algorithm

ZHANG Jing, LI Bai-Lin, ZHANG Wei-Hua, LIU Yong-Jun

2010, 23(4): 539-543. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1263)

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In order to improve the computational efficiency of the conventional collaborative optimization ( CO), an improved collaborative optimization algorithm based on the Kriging model (Kriging-CO for short) was proposed. In this algorithm, the approximate optimization model at the system level is constru...

Effect of Dynamic Load Coefficients on Fatigue Damage of Welded Components for 160 km/ h Wagon Bogie

ZHOU Zhang-Xi, LI Fei, HUANG Yun-Hua, AN Qi, LI Zhi-Qiang, PAN Shu-Peng

2010, 23(4): 544-548. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1277)

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In order to verify the fatigue strength of welded components for 160km/ h wagon bogie, a numerical simulation for the fatigue damage of dangerous welded joints in the main structures of the welded frame and bolster was made using structural finite element method (FEM) and Palmgren鄄Miner linear cumul...

Influence of Wear of Wheel Profile on Dynamic Performance of EMU

LI Yan, ZHANG Wei-Hua, ZHOU Wen-Xiang

2010, 23(4): 549-554. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1250)

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The shapes and diameters of each wheel of an electric multiple unit (EMU) were measured regularly by a WPD wheel profilometer, and the measured profiles were classified into 5 profile鄄wear conditions. Dynamic simulations were performed with a multi-body dynamics software to analyze the dynamic perfo...

Impedance Matching and Operation Characteristics of YNvd-Connected Transformer

CHEN Min-Wu, LI Qun-Zhan, JIE Shao-Feng, ZHANG Li-Yan

2010, 23(4): 555-560. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](883)

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In order to further apply YNvd-connected transformer, a new three-phase three-winding balance transformer, in the traction power system of electrified railway, a strict mathematical model for the transformer was set up based on the magnetomotive force balance equations, the winding connection equati...

Probabilistic Load Flow for Urban Rail Traction Power Supply Based on Monte Carlo Simulation

LIU Wei, LI Qun-Chen, TANG Bing, CHEN Min-Wu

2010, 23(4): 561-567. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](982)

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In order to research the uncertainty of urban rail traction load flow distribution, a Monte Carlo simulation method for the calculation of probabilistic load flow (PLF) was presented based on the unified AC/ DC power flow algorithm. This method constitutes the probability distribution of train posit...

Low-Power Encoding Method for Data Interface of Color CIS

LIU Yi, YANG Yin-Tang, WEN Bo

2010, 23(4): 568-573. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](802)

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To efficiently reduce the dynamic power dissipation of data interface of color CMOS (complementary metal-oxide-semiconductor) image sensor (CIS), signal activity of the data interface was analyzed. Based on high correlation and low activity of upper 6 bits of the same-color pixel signals, an encodin...

Method for Verifying the Correctness of Train Control System Design

CAO Yuan, TANG Tao, LUO Dan, MU Jian-Cheng

2010, 23(4): 574-579. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1004)

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To verify the correctness of a train control system design in the development stage, a formal method, which is based on RAISE (rigorous approach to industrial software engineering) and can be used for system modeling, description and verification, was proposed. For the tracking operation between two...

SINS/ GPS Integrated Navigation System for High-Speed Trains

ZHONG Xiao-Chun, ZHANG Hai-Tao, JIANG Xiang-Dong, LI Yuan-Zhong

2010, 23(4): 580-584. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1223)

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To achieve a high navigation accuracy for a high-speed train, an integrated navigation system was proposed based on SINS/ GPS ( strapdown inertial navigation system/ global positioning system). Error sources coming from SINS and GPS were analyzed respectively. Furthermore, a corresponding algorithm ...

Spin Iteration Quantum Search Algorithm

ZHOU Ri-Gui, CAO Jian

2010, 23(4): 585-588. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](921)

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In order to improve the searching efficiency of the Grover algorithm, a new quantum search algorithm was presented based on the Grover algorithm. This quantum search algorithm makes full use of the structural information of states, and spin quantum gates are designed in light of different initialize...

Algorithm for Error-Tolerant Semantic Matching of Heterogeneous Graphics

SHI Nian-Feng, WANG Guo-Qiang, TANG Wei-Qing

2010, 23(4): 589-595. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1103)

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In order to realize matching of 2D and 3D heterogeneous graphic data, an algorithm, named as MSMGE, for error-tolerant semantic matching of heterogeneous graphic data was presented based on the computer supported cooperative work in plant design. With this algorithm, the undirected-graph-like is use...

Robust Stability of Impulsive Cohen-Grossberg Neural Networks with Reaction-Diffusion Terms

SHI Ji-Zhong, XU Xiao-Hui, ZHANG Ji-Ye

2010, 23(4): 596-602. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1281)

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The global exponential robust stability of impulsive Cohen-Grossberg neural networks with reaction-diffusion terms at the equilibrium point was studied by applying a smooth boundary lemma, stability theory of vector Lyapunov function, and the mathematical induction. It was assumed that the activatio...

Performance Optimization of Collaborative Design Network Based on Service-Oriented Architecture

CAI Hai-Ni, WEN Jun-Hao, JI Jie

2010, 23(4): 603-608. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](910)

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In order to optimize the service performance of collaborative design network, an improved enterprise service bus(ESB) model with a layered service registry and QoS-based dynamic message routing was proposed in service-oriented architecture. By setting up a tree-like hierarchy among the service conta...

Effects of Array Errors on Fast Direction Finding Performance in Non-cooperative Passive Detection

LIU Zhi-Qiang, MA Hong-Guang

2010, 23(4): 609-614. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](835)

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Theoretical analyses were performed by applying the methods such as matrix norm and Taylor series, and so on, to quantitatively study the fast direction finding performance of a non- cooperative passive detection system with array errors, such as antenna pattern error, array element position error, ...

Improved Count Method of Train Sorting Schemes

CHEN Chong-Shuang, WANG Ci-Guang, JIAN Bing-Yi

2010, 23(4): 615-620. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](828)

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In order to ensure the punctual departure of fully loaded originating trains, the count method of train sorting schemes for dispatcher to make stage plan in marshalling yard was studied. Using the theory of dynamic wagon-flow allocating, default events were explicitly expressed according to the corr...

Markov Chain Queuing Model for Signalized Intersections with Stochastic Vehicle Arrivals

JIANG Yang-Sheng, HU Lu, PU Yun

2010, 23(4): 621-626. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](899)

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To overcome the limitation of the existing models for intersection queuing analysis in which vehicle arrivals are assumed to obey a particular distribution law, a general queuing model for signalized intersections with fixed cycle and stochastic vehicle arrivals was established using the embedded Ma...

Personalized Service Strategy of Travel Information Based on Multi-agent Negotiation

AN Shi, CUI Na, XU Hang

2010, 23(4): 627-634. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](975)

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In order to satisfy the travel information service demand of individual users and solve the road network equilibrium assignment problem, a personalized information service strategy based on multi-agent negotiation was proposed using utility theory and multi-agent modeling technology. In this model, ...

Experiment and Numerical Simulation of Micro-injection Moulding

CHENG Zhi-Jiang, BARRIERE T, LIU Bao-Sheng, GELIN J C

2010, 23(4): 635-638. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1568)

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Experiment and simulation were performed to study the feedstock fluidity and replication ability of micro-mould cavity. The experiment was conducted with a specially designed mould on a micro-injection system. The experimental results show that micro-injection parts in a size of 5 mm伊 1. 5 mm伊0. 8 m...

Microstructure Analysis of Vacuum Getter PdO Powder

CHEN Shu-Jun, WANG Rong-Shun

2010, 23(4): 639-642. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1081)

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In order to study the H2 adsorption mechanism of PdO powder in the vacuum multilayer insulated tank, adsorption and desorption of high purity N2 with PdO powder were carried out at 77 K using a Micromeritics ASAP2010 automated instrument, and the microstructure of the PdO powder was analyzed. Experi...

Pricing Strategy of Logistics Service Suppliers under Risk-Aversion

CUI Yi, ZHANG Jin, SHI Lu

2010, 23(4): 643-649. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](967)

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In order to reflect the effect of risk aversion of actors on the pricing strategy of a supply chain system, a supply chain model, in which manufacturers and logistics service suppliers both are risk averse, was established under the hypothesis that the market demands are influenced by the prices. Th...

Venture Capital Portfolio Based on Allocation of Capital and Management Inputs

PENG Fei, SHI Ben-Shan

2010, 23(4): 650-654. doi: 10. 3969/ j. issn. 0258-2724.

[Abstract](1407)

PDF 800KB(632)

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A method and its model to incorporate both management and capital inputs into venture capital portfolio decision-making were presented following Markowitz's portfolio theory. In the method, management inputs are seen as an important factor closely related to the return from a venture. An exponential...

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2010 Vol. 23, No. 4