西南交通大学学报

Theory and Key Technologies ofCross-Layer Design inW irelessM esh Networks

FANGXu-ming, MAZhong-jian

2005, 18(6): 711-719.

[Abstract](1281)

Abstract:
Due to the characteristics of wireless mesh network (WMN) in terms of topology, transmission link and traffic, the conventional layered protocol designmethods forwired networks can notguarantee the QoS performance forWMN. To reach a tradeoff between the efficiency of radio resources andQoS requireme...

SelfadaptiveW atermarking Synchrorization Scheme Based on Image Connectivity

WANGHong-xia, LUO Jian

2005, 18(6): 720-726.

[Abstract](1382)

Abstract:
To improve the robustness and security performances of watermarking, a selfadaptive watermarking synchrorization schemewas proposed. In the scheme, the connected objects are obtained according to image connectivity, and the gravity centers ofbigger objects are selected as the reference points forwat...

New Threshold Cryptosystem againstChosen C iphertextAttacks Based on Pairing

MEIQi-xiang, HEDa-ke, ZHENG Yu

2005, 18(6): 727-730.

[Abstract](1032)

Abstract:
To improve the decryption efficiency of the Baek-Zheng scheme, a new threshold scheme was proposed based on pairing. In the new scheme, the dot product operation in the Baek-Zheng scheme is replaced by an inversion operation to design the verifying process. Because the verifying process needs only o...

AnalysisM ethod forM yocardium Hypertrophy Images

XINGHao-yang, CHENXiang-dong, YANG Bo, WANG Zheng-rong

2005, 18(6): 731-734.

[Abstract](1379)

Abstract:
To increase the efficiency for measuring the size ofmyocardium fibers in evaluation of myocardium hypertrophy, an analysismethod formyocardium hypertrophy imageswas proposed based onHough transform. W ith thismethod, Hough transform is performed on the image ofmyocardium fibers to detected the direc...

Improved DWRR Scheduling Algorithm in PhysicalFrame Time-Slot Switching

XUDeng-yuan, ZHANGXin-you, LIUWen-jie

2005, 18(6): 735-739.

[Abstract](1533)

Abstract:
Deficitweighted round robin (DWRR) does notmeet the delay requirement of rt-VBR (real-time variable bit rate) traffic. To solve this problem, an improved DWRR scheduling algorithm was proposed. A new service classwas added in the proposed algorithm tomeet the delay requirement of rt-VBR traffic, whi...

Creep Behavior ofQuasi-high-speed Dedicated Passenger Railway Track G irders during Construction

XUEWei-chen, WANG Wei, RENTing-zhu

2005, 18(6): 740-745.

[Abstract](1627)

Abstract:
Four large scaleT-beamswith a geometricalproportion of1∶5 weremade to simulate track girders of theQinhuangdao-Shenyang dedicated passenger railway. Their creep deformations during the construction were investigated experimentally. The research laid emphasis upon the effects of types of concrete and...

Dynam ic Responses ofCable-Stayed Bridgeswith Different Structural Systems to Impact

ZHANG Wei, QIAN Yong-jiu, QIANG Shi-zhong

2005, 18(6): 745-749.

[Abstract](1866)

Abstract:
The purpose of this research is to probe into the dynamic responses of cable-stayed bridges to the attack of a conventionalweapon to provide an important reference for the feasibility studies of engineering protection and repair technology of importantbridges. A nonlinear finite elementprogram, LS-D...

“Erecting Cable before Constructing G irder”ConstructionM ethod of Self-Anchored Suspension Bridges

WEN Shu-dong, ZHENGKai-feng, HUANG Jun

2005, 18(6): 750-753.

[Abstract](1647)

Abstract:
To expand the application range of self-anchored suspension bridges, a novel construction methodwas brought up for self-anchored suspension bridges with a short span ranging from 100 to 400 m. It is called as“erecting cable before constructing girder”(ECBCG) constructionmethod and means that in the ...

Evolution Law ofHysteresis Curve ofRock under Cyclic Loading

XU Jiang, YANGXiu-gui, WANGHong, WANG Wei-zhong

2005, 18(6): 754-758.

[Abstract](1311)

Abstract:
To investigate the deformation behaviors ofrock the evolution of the hysteresis curve ofrock under cyclic loadingwas studied by the experimental investigation of the deformation characteristics of fine sandstone under cyclic loading at three deformation rates and two stress levels. The research show...

Load-BearingM echanism ofCompound TunnelAnchorage

WANGHai-bin, GAO Bo

2005, 18(6): 759-764.

[Abstract](1694)

Abstract:
Based on a field test and FEM( finite elementmethod) numerical simulation, the load- bearingmechanism of the tunnelanchorage system ofsuspension bridgeswith pre-stressed anchor cable was investigated. The key parameters were determined through the back-analysis of the dynamic construction process. I...

NeuralNetwork Online Control to Road Tunnel with LongitudinalVentilation

ZHANG Guang-peng, LEIBo

2005, 18(6): 765-768.

[Abstract](1606)

Abstract:
An on-line controlmodel for road tunnelwith longitudinal ventilation was proposed based on neural networks and by combining traffic mode,l aerodynamics model and pollution mode.l Simulationwas conductedwith themode,l where the traffic volume changed from 1 000 to1 400 veh/h and the benchmark emissio...

New Idea on Treatment ofLeachate from Municipal SolidW astes —Application ofBioreactor LandfillTechnology

LIUDan, LIQi-bin

2005, 18(6): 769-773.

[Abstract](1436)

Abstract:
To solve the problem of expensive cost and complicated process of treating leachate from municipal solid wastes, simulating landfill experiments were conducted based on analyzing the characteristics of leachate treated by containment landfills and bioreactor landfills. The results indicate that the ...

Deformation Behaviors of63Sn-37Pb Solder Alloy under Uniaxially Cyclic Loading atRoom Temperature

YANGXian-jie, SHAO Er, LUO Yan, SUN Ya-fang, XU Yin-jie

2005, 18(6): 774-778.

[Abstract](1254)

Abstract:
The uniaxial cyclic deformation behaviors of 63Sn-37Pb solder alloy were experimentally investigated underdifferentdwell times, strain rates, strain amplitudes, strain-time loadingwaveforms and loading histories. The study shows that the solder alloy has a significant strain-rate sensitivity, its in...

Effects ofAsymmetricalParameters of Structure on StructuralFlutter Velocity

YEXian-hui, YANG Yi-ren, LIUFei

2005, 18(6): 779-783.

[Abstract](1266)

Abstract:
A flutter differential equation for two coupled asymmetrical control surfaces was derived usingLagrangian equation under the supposition of quasi-steady aerodynamic forces. Examples were presented to analyze the effectsofasymmetricalparameterson the critical fluttervelocityunderdifferent coupled sti...

ImprovedM ixed-M odeM ethod ofValid ElasticM odulus ofComposites

TIAN Yun-de, QIN Shi-lun

2005, 18(6): 783-787.

[Abstract](1255)

Abstract:
Based on the continuummechanics theory, amixedmodewas setup to investigate the valid elastic modulus of composites. An improved mixed-mode method was proposed, and the revised formula of calculating the valid elastic modulus of compositeswas given. The calculational results of the valid elasticmodul...

M odel ofRailway Transportation Channel Share Based on Finished Dedicated Passenger Line

PENG Qi-yuan, YIN Yong, YANHai-feng

2005, 18(6): 788-792.

[Abstract](1766)

Abstract:
To sufficiently give play to the transportation capability of railway transportation channels consisting of a dedicated passenger line and an existing line, factors influencing the share of railway transportation channels were analyzed, and a mathematical model of railway transportation channel shar...

BilevelProgramm ingM odel for C ity Road Network Planning and ItsApplication

QUPeng-ju

2005, 18(6): 793-797.

[Abstract](1651)

Abstract:
The objectives ofcity road network planning and shortcomings of the available programming modelswere analyzed. A bilevelprogrammingmodelwas proposed for city road network planning, and iteration optimization algorithm was used to solve themode.l As an example of application, themodel was applied in ...

Vehicle Routing Problem with FullLoad and Driving Distance Restriction

WEIHang, LIJun, WEIJie

2005, 18(6): 798-802.

[Abstract](1509)

Abstract:
The graphmodelwas applied to solve the vehicle routing problem with full load (VRPFL) and a driving distance restriction. A route choicemodelwith a driving distance restriction was setup through transforming the driving distance restriction into the objective restriction. The genetic algorithm based...

Design ofOptimalRebate ofM anufacturer to Dealers

HUPei, TANDe-qing, YUBi-jun

2005, 18(6): 803-805.

[Abstract](1263)

Abstract:
To solve the problems of the optimal rebate standard ofmanufacturers to sealers and the lowest sales volume corresponding to the standard to stimulate dealers efforts and gainmore profits, a gamemodelbetween the relationship of amanufacturer and its sealerswas set up and analyzed. The research shows...

Choice ofVenture InvestmentBehaviors of Investors

PENG Wei-min

2005, 18(6): 806-810.

[Abstract](1278)

Abstract:
To provide a correct guidance for investors, the factors influencing the choice of venture investmentbehavior of investors were investigated from the point of view of behavioral finance and through analyzing the risk-averse utility curves, expected utility, investment net present value and opportuni...

Order AllocationM odel in Supply Chain and Hybrid Genetic Algorithm

JIXiao-li

2005, 18(6): 811-815.

[Abstract](1574)

Abstract:
A mixed integer linearprogramming (MILP) model forordersdispatching in a supply chain withmulti-produc,t multi-order, and multi-period was proposed. To shorten the time for solving the model and avoid the illegal chromosome, a hybrid genetic algorithm that combines genetic algorithm with a heuristic...

Effect ofProportion Allocation Based on Past Sales on Supply Chain Performance

ZHAO Xiao-min, HUANG Pei-qing, WANGNan

2005, 18(6): 816-820.

[Abstract](1368)

Abstract:
To investigate whether proportion allocation based on past sales, compared with the fixed allocation, can improve the performance of a supply chain, a two-stage game modelwas set up to a supply chainwith one supplier andmultiple retailers, and the effects of the proportion allocation based on past s...

EBA M odel for Relationship between Econom ic Growth andM arketization Level in China

WANG Li-ping, TANDe-qing

2005, 18(6): 821-824.

[Abstract](1390)

Abstract:
The conception, character and testingmethod of the model ofEBA (the extreme bounds analysis) were summarized systematically, and the problems existing in its applicationswere analyzed. A demonstration analysis of the relationship between the economic growth and marketization level of Chinawas carrie...

K-Dimension of the Graphs of a C lass ofBush Functions

WANGHong-yong, XU Shao-yuan

2005, 18(6): 825-828.

[Abstract](1049)

Abstract:
TheK-dimension of the graphs of a class of Bush functions was studied. These fractal functions are defined by using the expression of the Cantor series of real numbers. The expressions of the upper and lowerboundaries for theK-dimension ofsuch graphswere obtained. It is shown that the K-dimension of...

Distribution Theorem s for Values ofPower Functions with Complex Bases and Exponents

TONG Ji-xian

2005, 18(6): 829-831.

[Abstract](943)

Abstract:
By theorem of real funcion, the distribution theorems for infinite numberofvalues ofpower functionswith complex bases and exponentswere discussed. If the exponentαis an irrationalnumber, the the values are densely distributed on a circle. Ifαis a pure imaginary number, the values form an isolated se...

New Exact Solutions of the Lienerd Equationswith Fifth-Order Stronger Nonlinear Terms

TIAN Ying-hui, CHENHan-lin, LUO Yuan

2005, 18(6): 832-836.

[Abstract](1052)

Abstract:
By constructing auxiliary differential equations, newmultiple exactsolutions of the Lienard equations with fifth-order stronger nonlinear terms were obtained, including solitary solutions, trigonometric function solutions, Jacobian elliptic function solutions. By use of the results , new multiple ex...

H ierarchic Construction ofConceptLattice

XIE Run, LIHai-xia, MAJun, SONG Zhen-ming

2005, 18(6): 837-841.

[Abstract](1443)

Abstract:
Two importantproperties of hierarchical concept lattice were presented: the concepts in a same layerare incomparable and a concept isoverlayed by at leastone concepton the upper layer. The general formula for the object and atributemappingwas derived, and a theorem, which describes the structural in...

Lattice Implication Algebraic Equations in Lattice Implication Algebras

PANXiao-dong, XU Yang, ZHANG Qing

2005, 18(6): 842-845.

[Abstract](1273)

Abstract:
According to the theory about logic algebraic equation, the notion of lattice implication algebraic equationwas proposed. Some typical one varialbe lattice implication algebraic equations in lattice implication algebrasLwere discussed. The necessary and sufficient conditions for existance of solutio...

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2005 Vol. 18, No. 6