西南交通大学学报

Effect Analysis of Track Stiffness on Dynamic Characteristics of Wheel-Rail System and Its Dynamic Optimization

LIUXue-yi

2004, 17(1): 1-4.

[Abstract](1594)

Abstract:
The effects of track stiffness on track dynamic characteristicswere investigated by the wheel-rail system dynamic analysis in frequency domain. The concepts of sensitivity coefficients of track dynamic parameters to track stiffness were put forward and defined. The method of dynamic optimization was...

Sensitivity Analysis of Elastoplastic Time-History Reliability of Story-Drift Capacity of Aseismatic RC Frames

ZHANGXin-pei, GE Yan, CHENShi-chao

2004, 17(1): 6-9.

[Abstract](1632)

Abstract:
An algorithm was proposed to analyze the elastoplastic time-history reliability of lateral deformation capacity of aseismatic reinforced concrete(RC) structures on the basis of the improved JC method for calculating the static reliability of structures, the Wilson-θmethod and the member-storymodel. ...

Experimental Research on Confluence between Debris Flow and Main River

CHENChun-guang, YAOLing-kan, YANG Qing-hua

2004, 17(1): 10-14.

[Abstract](1567)

Abstract:
Model similarity-rules for confluence between a debris flow and the main river were analyzed, and a series ofmodel experimentswere performed to investigate the regularityof confluence between a debris flowand the main river. The experimental result shows that the movement patterns of a debris flow a...

Modified Mesri s Creep Model for Soils in Sliding Zone of Xietan Landslide in the Three Gorges

WANG Chen, LIUHao-wu, XUQiang

2004, 17(1): 15-19.

[Abstract](1615)

Abstract:
In orderto provide the basementof a further numerical analysis, the drained triaxial compression creep tests with a constant stress were carried out for soils in the sliding zone of Xietan landslide in the Three Gorges. Based on these tests, a shear stress-strain-time function, namely, Mesri s creep...

Model Experiment System for High-Speed Trains and Analysis of Its Similarity

WANG Ying-xue, LUOJian-jun, LILun-gui, JUJuan

2004, 17(1): 20-24.

[Abstract](1807)

Abstract:
To solve the aerodynamic problems resulted from high-speed trains when they pass through a tunnel, a model experiment system for high-speed trains was set up on the basis of analyzing the relative present experiment systems(methods) at home and abroad, and its similarity rules were derived. In this ...

Accuracy Estimation of Lateral Piercing for GPS Tunnel Control Network

GULi-ya

2004, 17(1): 25-29.

[Abstract](1478)

Abstract:
Based on the observations of the baseline vector measured by GPS technology, a formula of accuracy estimation of lateral piercing for GPS tunnel control networks was deduced. A practical example verifies that the estimated results obtained by ignoring the covariance of the observations are very clos...

Research on Benefit Allocation among Cooperative Partners in Supply Chain

YEHuai-zhen, HUYi-jie

2004, 17(1): 30-33.

[Abstract](1266)

Abstract:
The four principles for benefit allocation among cooperative partners in a supply chain were proposed,i. e.more pay for more work, venture compensation, effectiveness maximization and comprehensive optimum. Three models of benefit allocationwere set up respectively based on the first three principle...

Decision-Making Model for Outsourcing in Supply Chain

MAZu-jun

2004, 17(1): 34-37.

[Abstract](1377)

Abstract:
In order to meet the demand of outsourcing decision-making in a supply chain, an outsourcing model was proposed, and the capacity investment levels and production decisions of an upstream firm (supplier) and a downstreammember(buyer) were analyzed under the condition of their making decisions separa...

Optimum Decision-Making Model and Arithmetic Analyzing of Delivery System Based on VMI

LI Zong-ping, YUANQing-da

2004, 17(1): 38-41.

[Abstract](1643)

Abstract:
To implement the integrated supply chain and VMI (Vendor-managed inventory), an optimization model was proposed by taking both the delivery expenses and the inventory expenses of customers into account. Under the condition that vehicles for delivery have been dispatched for specific customers as the...

Mathematical Model and Analysis of Runway Landing Capacity

YUJiang, PUYun

2004, 17(1): 42-46.

[Abstract](1680)

Abstract:
It is believed that most of parameters influencing the interarrival time of landing are random variables, so the setting up of a runway landing capacity model must be based on probability theory. From the viewpoint of a controller, a probability model of runway landing capacitywas proposed. In this ...

Analyses of Valuation of Market Information and Its Influential Factors

ZHANG Yong-peng, WEI Ya-qin, SHI Yu-ling

2004, 17(1): 47-50.

[Abstract](1551)

Abstract:
Based on a game model, the relationship between the valuation of market information and its influential factorswas discussed. The research shows thatmarket information is ofgreatervaluationwhen the variation of market demands, the substitutabitity of products, or the scale of enterprises, is large.

Empirical Research on Relationship Between Customer-Orientation Behavior and Competitive Superiority of Enterprises

LIUBo, TANDe-qing, YE Yong

2004, 17(1): 51-55.

[Abstract](1003)

Abstract:
In order to raise the competitive superiority of enterprises, the cross-sectional data of manufacture and service industries in China were used to analyze the effects of the customer-orientation behaviors of enterprises on their competitive superiority. The research result shows that the customer- o...

Team Incentive Model of Nonprofit Organizations

MAO Gang, ZHULian, LIKai-rong, GUO Yao-huang

2004, 17(1): 56-60.

[Abstract](1157)

Abstract:
Based on Holmstrom’s team theory, a team incentive model for nonprofit organizations was established by considering a variable of public utility and ignoring environmental effects. Itwas proved that there is no Nash equilibrium of the game induced by allocation schemes under the conditions of budget...

Chaotic Self-motion of Redundant Robot in Null Space

LILi, LIKai-fu, CHEN Yong

2004, 17(1): 61-63.

[Abstract](1460)

Abstract:
Based on the control theoryof feedback linearization, the zero dynamics equation for a planar3R rigid redundant robotwas derived. Using Poincare maps and Lyapunov exponents, the motion state(regular or chaotic motion) of the redundant robotwas numerically simulated, and the relationship between its ...

Efficient Algorithm for Line Clipping against General Polygon

ZHAO Ping, FENG Chun, LIBo-lin

2004, 17(1): 64-68.

[Abstract](1348)

Abstract:
Based on the analysis of advantages and disadvantages of the existing algorithms, a new algorithm for line clippingwas proposed. This algorithm is composed of three steps: the intersection points of a line to be clipped and a general polygon are calculated, the line is cut into several sub-lines bas...

Design of Continuous Wheel/Rail Force Measurement System

PANZhou-ping, ZHANGLi-min

2004, 17(1): 69-72.

[Abstract](1483)

Abstract:
Based on the characteristic of rails underthe action ofwheels of a train, a continuouswheel/rail force measurement systemwas designed, and the parameters in the formulae for calculating the vertical and horizontal forces were determined by simulation. The system was evaluated on an experimental rail...

Experimental Research on Properties of Existent Rubber Draft Gear for Meter-Gage Railway Freight Car

LI Yang-hui, ZHAO Yong-xiang, SUN Ya-fang

2004, 17(1): 73-76.

[Abstract](1429)

Abstract:
To find out the causes for the poor behaviors of the existing rubber draft gears and develop new rubber draft gears, the properties of the existing rubber draft gears of meter-gage railway freight cars were investigated experimentally. The experimental results reveal thathigh compressionmodulus and ...

Algorithm of Optimal Active Structural Control Based on Precise Integration

LIJin-qiao, YUJian-hua

2004, 17(1): 77-81.

[Abstract](1325)

Abstract:
To raise the calculation precision of active structural control, the closed-loop and closed-open- loop control algorithms for instantaneous structural optimizationwere improved based on the active structural control strategy and the precise integration method (PIM). Different from the traditional so...

Dynamical Characteristics Analysis of Core Barrel of Nuclear Reactors in Air and Still Water

LULi, YANG Yi-ren, JINJian-ming

2004, 17(1): 82-85.

[Abstract](1902)

Abstract:
By means of the fliud-structure interaction, the dynamical characteristics of the core barrel of nuclear reactors in air and in stillwaterwere investigated using programANSYS. Asolid modelwas used to simulate the core barrel, the fluid structurewas simulated bythe elementof fluid80, thus the effecto...

Generalized Association Rule Base and Its Mining Algorithm

LITian-rui, YANGNing, MAJun

2004, 17(1): 86-89.

[Abstract](1418)

Abstract:
To solve the problemthatthe existing algorithms ofmining association rules result in a numberof rules, upper closed set of an item set and generalized association rule base were defined. And some important propositions were obtained,e.g.the upper closed set of an item set exists uniquely and is the ...

Syntactic System of Lattice-Valued Propositional Logic Based on Finite Lattice Implication Algebra

MAJun, GAO Ya, QINKe-yun, XUYang

2004, 17(1): 90-94.

[Abstract](1337)

Abstract:
By taking finite lattice implication algebra as a truth-value field, a syntactic system of lattice- valued propositional logic based on finite lattice implication algebra was proposed. The basic definitions of syntactic implies, proof and consistency of the system on levelAwere given axiomatically. ...

Reduced-Order Method for Connection Matrix in Network with Voting Systems

CHENG Shi-juan, LUWei, HEPing

2004, 17(1): 95-98.

[Abstract](1339)

Abstract:
To solve the problem that the order of a connection matrix is greatly increased because a large number of repeated nodes and links are resulted in when a network with voting systems is changed into a network graph, a reduced-order method was proposed. In this method, the connection matrix are divide...

Video Error Concealment Technique Based on Side Matching

PENG Qiang, ZHUChang-qian

2004, 17(1): 99-103.

[Abstract](1258)

Abstract:
A newerror concealmentmethod using pre-concealment process (PREP) and search concealment (SC ) was proposed. This method uses surrounding motion vectors (MV) as many as possible by pre- processingadjacent MBs(Macroblock, MB), and then finds the best MV s by performing an additional search process. S...

New Class of Spreading Sequences for Quasi-synchronous CDMA Systems

HUFei, WENHong, CHENHua-wei

2004, 17(1): 104-107.

[Abstract](1198)

Abstract:
Based on the generalized Chirp-like sequences, a new class of spreading sequences was constructed with the help of the product technique and its correlation properties were discussed. The research results show that among the proposed sequences, there is a subclass of sequences with zero correlation ...

Optimization of Compensation Length for Multi-period Postcompensation DM Systems

XIONGJie, LUO Bin, PANWei, ZHUXi-ping

2004, 17(1): 108-111.

[Abstract](1336)

Abstract:
To obtain an optimumdispersionmanagement (DM) scheme for 40 Gb/s long-haul multi-period postcompensation systems, compensation lengthswere studied by simulation. The results showthatthe pulse width is inerratic alongthe longfiber, the optimumlength for a long-haul multi-period system is shorterthan ...

Non-linear Noise Canceller Based on Additive-Multiplicative Fuzzy Neural Network

ZHAIDong-hai, LILi

2004, 17(1): 112-116.

[Abstract](1751)

Abstract:
A novel nonlinear noise canceller based on additive-multiplicative fuzzy neural network (AMFNN) was proposed, and its model, learning algorithm and universal approximationwere discussed. In the cancellation process, AMFNN is used to approximate the noises, and the noises are cancelled to recover the...

Globally Asymptotic Stability of Neural Networks with Reaction-Diffusion

ZHENG Wei-fan, ZHANGJi-ye

2004, 17(1): 117-121.

[Abstract](1597)

Abstract:
Even type Lyapunov functions were constructed based on M-matrix theory to study the globally asymptotic stability of Hopfield networks with reaction-diffusion. These networks are generalized without assuming the boundedness, monotonicity and differenciability of the activate functions. The condition...

Linear Theory of Relative Traveling-Wave Tube Filled with Plasma

WANG Yun-xiu, YANG Zi-qiang, LIANG Zheng

2004, 17(1): 121-125.

[Abstract](1345)

Abstract:
Based on the assumption that the guide magnetic field is infinite, the dispersion equation for a ripple slow-wave structure filled with plasmas was derived. Through a numerical simulation, the effects of plasma densitywere analyzed on the dispersion property when there is no an electron beam in a sl...

Approximation Capability of Fuzzy System Based on Multi-resolution Analysis

WANGHui, XIAOJian

2004, 17(1): 126-130.

[Abstract](1190)

Abstract:
A novel T-S fuzzy system based on multi-resolution analysis was presented. The system was constructed based on multi-resolution analysis theory and localization in time-frequency domains. B-spline functions were taken as scale functions to make use of their compact supporting and multi-resolution ch...

In SituSynthesis of TiB2-TiCxCeramic Matrix Composites by Hot Isostatic Pressing

JIANGJun, ZHUDe-gui, WANGLiang-hui

2004, 17(1): 131-134.

[Abstract](1140)

Abstract:
TiB2-TiC ceramic matrix composites were fabricated byin situsynthesis under hot isostatic pressing (HIP) with 3TiH2-B4C and 11TiH2-3B4C being the rawmaterials, respectively. The XRD analysis indicates that the samples synthesized from3TiH2-B4C haveTiB2andTiC phases, while those from11TiH2- 3B4C have...

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2004 Vol. 17, No. 1