西南交通大学学报

Research Advances in Automatic FacialExpression Recognition

ZHANG Jia-shu, CHENHui, LIDe-fang, LUO Xiao-bin, XIAXiao-dong

2005, 18(3): 285-293.

[Abstract](1350)

Abstract:
As a challenging interdiscipline ofbiologic feature recognition and affection calculation, the technique ofautomatic recognition of facial expression (facial expression automatic recognition system, FEARS) develops quickly driven by demands of various applications. Nevertheless, fully automatic faci...

Technical Schemes forM etro Station Construction Based on ShieldM ethod

HE Chuan, DING Jian-long, LIWei

2005, 18(3): 293-297.

[Abstract](1714)

Abstract:
The construction methods of overseas metro stations driven with the shield method were introduced. Based on the fact thata single-line shield tunnelhas a diameterofabout6. 0m in China, four construction schemes of ametro station driven from a sectional shield tunnelwith the expanding excavationwere ...

3D Elasto-plastic Numerical Simulation of Entire Construction Process for H ighway Tunnel

SHE Jian, HE Chuan

2005, 18(3): 298-302.

[Abstract](1531)

Abstract:
In order to obtain the regularities of stress, strain and displacement of tunnel structures during excavation, the northern end ofBijiashan tunnel in the 2nd stageYu-Qian projectwasmodeled and its construction process was numerically simulated with 3D elasto-plastic finite elementmethod (FEM). Compa...

CFD Simulation ofAir Distribution of Subway Side-Platform

YUAN Feng-dong, YOU Shi-jun, YANGXiang-jin

2005, 18(3): 303-307.

[Abstract](1542)

Abstract:
To provide a reference for the airdistribution design ofa subway side-platform and appraise the blue print of an air distribution design, a three-dimensionalmodel for typical side-platformswas constructed to got an appropriate supply air temperature difference to optimize the design of an air condit...

M odelingM ethod for Large Strip DigitalTerrainM odel

YISi-rong, L Xi-kui, ZHANG Jia-ling

2005, 18(3): 308-312.

[Abstract](1497)

Abstract:
From the characteristics ofmass terrain data in a railway location system, a practical fast algorithm for strip digital terrain model (S-DTM) generation was proposed based on the constraint DelaunayTIN (triangulated irregularnetwork). Thismethod takesmany of the characteristics of large strip terrai...

GPSM onitoring ofX ianshuihe Fault and Blocks on Its Both Sides

TANG Wen-qing, LIU Yu-ping, CHEN Zhi-liang, HUANG Ding-fa

2005, 18(3): 313-317.

[Abstract](1363)

Abstract:
Based on the GPS measurement of the Xianshuihe fault and blocks on its both sides, Chuan-Dian block and Chuan-Qing block, a velocity field on the Eurasia reference frame was obtained. The movement velocities ofGPS stations in the region were estimated using least-squares fitting under the hypotheses...

M easurementM odel ofDigitalM aps Based on Geographic Coordinates

YANG Yong-chong, GUO Da-zhi

2005, 18(3): 318-321.

[Abstract](1158)

Abstract:
To construct a digitalmap based on geographic coordinates is a bettermethod to bring digitalmaps in different coordinate systems or projection zones into one system or joint them. In the measurementof digitalmaps based on geographic coordinates, the deviation between the reference ellipsoid surface ...

Influence ofRainfall on Stability ofCarrying Soil ofAfforested Slope

WUXi-yong, LIANG Yi, LIShu-ding

2005, 18(3): 322-324.

[Abstract](1353)

Abstract:
Based on themodel of carrying soil failure under the condition of rainfal,l the influence of rainfallon the stability ofcarrying soilduring the afforestation ofa slopewas investigated. The research indicates that the stability of carrying soil is closely related to the character of rainfal,l the gra...

Upper Lim it ofAngle between Strikes of Slope and Strata for Dip Slope

BAIYun-feng, ZHOUDe-pei, FENG Jun

2005, 18(3): 326-329.

[Abstract](1417)

Abstract:
Similar simulation testsweremade to determine the upper limitofangle between the strikes of slope and strata for a dip slope. Furthermore, the developmentcharacteristics ofbedding-slips along the Chongqing-Huaihua railway from Fuling City to Longtan Town section were investigated to prove and comple...

Role-Based Access Control ofCollaborative Design System s

LIBai-lin, LUMao-hua

2005, 18(3): 330-333.

[Abstract](1232)

Abstract:
The roles were analyzed in terms of their characteristics in the access control of collaborative design systems, and their granularity were determined. The technique of role-based access control (RBAC) and session function provided by JSP (Java serverpages) were used to realize an access control sys...

Performances ofUltra-fine TiC0. 7N0. 3CermetCutting Tools

GONG Bang-ming, YU Jun-hui

2005, 18(3): 334-337.

[Abstract](1338)

Abstract:
Cutting performances of ultra-fine TiC0. 7N0. 3cermet cutting tools were investigated and compared with those of ordinary cermet and carbide cutting tools. The exponential formulas of the cutting forces were obtained based on the experimental data. The lives of the ultra-fine TiC0. 7N0. 3 cermet cut...

G lobalExponential Stability ofHopfield NeuralNetworks

TANXiao-hui, ZHANG Ji-ye, YANG Yi-ren

2005, 18(3): 338-342.

[Abstract](1587)

Abstract:
The existence, uniqueness of the equilibrium point of a class ofHopfield neural networks were studied by introducing nonlinearmeasures. The activation function is nonlinear and notnecessary to be continuous, monotone and bounded. Some sufficient conditions and convergence estimation for global expon...

G lobalExponential Stability of a C lass of Interconnected Large-Scale System swith Time Delays

RENDian-bo, ZHANG Ji-ye

2005, 18(3): 343-346.

[Abstract](1594)

Abstract:
The global exponential stability of a class of linear interconnected large-scale systemswith time delayswas analyzed based onM-matrix theory and by constructing a vectorLyapunov function. A criterion was obtained for global exponential stability of the systems by analyzing the stability of different...

Experimental Investigation onM echanicalProperties of Nano-Al2O3Coating on ResinM atrix Composites

XULi, JIANGXiao-yu, QIAN Lin-mao

2005, 18(3): 347-350.

[Abstract](1403)

Abstract:
The mechanical properties of nano-Al2O3coating on Al2O3short fiber reinforced epoxy composites were analyzed with nano-indentation and nano-scratch tests to study the relationship between the properties and coatings and coating procedures. The procedures to coat the coatingsduring and after the soli...

ThermalResidual Stresses and Their Effects on Properties ofδ-Al2O3 Short Fiber Reinforced AlAlloy Composites

ZHANG Juan, GAO Qing, KANG Guo-zheng

2005, 18(3): 351-354.

[Abstract](1607)

Abstract:
A double fibermodel was proposed. The distribution of thermal residual stresses inδ- Al2O3 f/Al alloy composites and the effects of thermal residual stresses on the properties of the compositeswere calculatedwith a double fibermodel and elasto-plastic finite elementmethod. Tensile stress-strain curv...

VerticalRandom Response Analysis ofLocomotives Based on AugmentedM atrix

YANG Guang-wu, XIAO Shou-ne, JINDing-chang

2005, 18(3): 355-340.

[Abstract](1604)

Abstract:
Augmentedmass, damping, stiffnessmatrix ofsystem was setup to derive verticaldynamic differential equations for locomotive components and obtain output responses of suspensions. To avoid cross-spectrum density of each inputwhen calculating spectrum density of system outpu,t multi-input excitation in...

Time Restraint-BasedM odel and Algorithm for Railway EmptyW agon Distribution

LIZong-ping, XIAJian-feng

2005, 18(3): 361-365.

[Abstract](1685)

Abstract:
Traditionalmathematical optimalmodels for empty wagon distribution do not consider the time efficiency of emptywagon distribution and efficientusage ofemptywagons by loading them where they are or in the neighboring stations. To overcome the shortcomings of the traditionalmodels, a new model and its...

Evaluation and Enhancement ofTransportCapacity of Railway System in BAOSTEEL

MAGuo-zhong, LIUQing-wei, WANG Ci-guang

2005, 18(3): 366-370.

[Abstract](1479)

Abstract:
The transport capacity of the railway system in BAOSTEEL was evaluated based on a thorough investigation on the carrying capacities of the sub-systems, such as locomotive, arrival- departure tracks, and loading-unloading of products and coke. The investigation shows that the subsystems of locomotive...

EconometricM odel for Transportation System of Sichuan Province

FANG Gui-jin, PENG Yue

2005, 18(3): 371-374.

[Abstract](1517)

Abstract:
An econometric model consisting of 12 explicit formulas for analyzing the transportation system ofSichuan province, China, was derived according to the principles ofsystems engineering and system dynamics. Themodelwas tested in terms ofeconomic significance, statistics, econometrics and stability, a...

Evaluation of Sustainable Development in CoalEnterprises Based on BP NeuralNetwork

XU Jun, DUWen, ZENG Qi

2005, 18(3): 375-379.

[Abstract](1366)

Abstract:
Based on analyzing the existingmethods for evaluation of sustainable development of coal enterprises, an evaluation-index system was established. A neuralnetworkmodelwithmulti-hierarchic structurewas built based on error back-propagation (BP) algorithm. The conjunction weights of the neural network ...

Analysis on RegionalVenture CapitalEnvironmentBased on AHP Fuzzy Comprehensive Evaluation

JIN Jing-yu, LIUChao-ming, HAN Bin

2005, 18(3): 379-384.

[Abstract](1527)

Abstract:
AHP ( analytic hierarchy progress) and fuzzy evaluation were combined to get a comprehensive evaluation method for evaluating venture capital environments of big cities in China, where there have been fastdevelopments in venture capita.l A big city inwestChinawas taken as an example. The evaluation ...

Game Analysis of Stock PriceM anipulation Through Takeover Bids

QIUPei-guang, ZHANG Yong-peng

2005, 18(3): 385-389.

[Abstract](1278)

Abstract:
The influences of an increase in noise trading before and after bidding and the level of takeover activities on the possibility ofmarketmanipulation were analyzed with an incomplete game model to explore ifdropping bid should be allowed after a buyer has bid. The conclusion is that the unique equili...

Application of Jar-M etric Principle for Solving Lexicographic OrderMultiobject andMultistage Decision Problem s

WANGMing-hui

2005, 18(3): 390-393.

[Abstract](1298)

Abstract:
A lexicographic ordermultiobjectandmultistage decisionmodelwas derived. The principle and algorithm of Jar-metricwere applied to solving the problem. In a Jar-metric graph representing a lexicographic ordermultiobject andmultistage decision problem, a Jar valve from a starting node to a destination ...

Algorithm for FaultLocation ofElectric Traction Network with Series Compensators

WANG Ren, LIN Guo-song, QIANQing-quan

2005, 18(3): 394-397.

[Abstract](1575)

Abstract:
The relationship between impedance and distance of power traction network with series compensators is notmonotone in the electric traction network of electrified railways. The conventional method of fault location fails because therewillbe two ormore faultpoints corresponding to an actual fault. A n...

M icro-Computerization ofFrequency-Shifting Automatic Block Transm itting Equipment

XIANG Jun

2005, 18(3): 398-401.

[Abstract](1162)

Abstract:
To overcome the shortcomings of traditional equipment of frequency-shifting automatic block, a three-display frequency-shifting automatic block transmitting device was designed. It uses a single-chip microcomputer as the main componen,t an external timer/counter and some simple auxiliary circuits to...

FastAtom Construction Algorithm for SignalDecomposition in Over-Complete Dictionary

HUAZe-xi, YIN Zhong-kel　HUANGXiong-hua

2005, 18(3): 402-405.

[Abstract](1340)

Abstract:
It is one of themain problems in signal decomposition in over-complete dictionary that the atom construction process is very slow. To solve this problem, a new fast algorithm was proposed. In the algorithm, all atoms are divided into two categories: small and large atoms, according to their scales. ...

Knowledge Base System for DataM ining

ZHUHeng-min, JIXiao-li, WANGNing-sheng

2005, 18(3): 406-412.

[Abstract](1169)

Abstract:
Six types of domain knowledge for data mining were summarized. A method of two-level knowledge organization, that is a combination of index knowledge and domain knowledge, was proposed. The former, as the knowledge catalog, codes the latter according to the characteristics of knowledge. Domain knowl...

Comprehensive EvaluationM odel for Difficulty Coefficient ofRoad Adm inistration

JIANG Gao, SONGXue-jun, CHENDe-xin

2005, 18(3): 412-416.

[Abstract](1383)

Abstract:
The factors affecting the difficulty coefficient of road administration were analyzed, and a new model was proposed. In the mode,l the index system is established based on AHP (analytic hierarchy progress), and the road administration information is standardized based on fuzzy logic theory. Theweigh...

A NovelP2P Resource Sharing IncentiveM echanism

XIAO Bo, JINWei, HOUMeng-shu

2005, 18(3): 417-421.

[Abstract](1553)

Abstract:
To resolve the“free rider”and the“tragedy of the commons”problem in peer-to-peer storage systems. In this paper, we propose incentivemechanism in aP2P storage sharing system based on the genetic algorithms. In this mechanism, the provider allocates the sharing space based the genetic algorithms, and...

Sequence Design ofZero Correlation Zone Based on Interleaved Technique

WANG Long-ye, TANGXiao-hu

2005, 18(3): 422-425.

[Abstract](1450)

Abstract:
To lower the complexity of the existing methods, a new sequence design method of zero correlation zone (ZCZ) based on interleaved technique was proposed. For a given ZCZ sequence set where the length isL, the size of the sequence isM, and the zero zone isz, a new sequence set is obtained bymtimes of...

M atched Filtering ofLFMCW Radar Signals

GUO Lei, YANG Zhong-hai

2005, 18(3): 426-429.

[Abstract](1340)

Abstract:
The outputofmatched filters for linear frequencymodulation continuouswave (LFMCW) signalswas analyzedwith period ambiguity function. Frequencyweighting is effective to depress range side lobes and improve multi-target resolution, but itwidensmain range lobes in the same time and leads to loss in sig...

Focal Shift in Elegant sin-Gaussian Beam s Using Second-OrderM omentM ethod

HUANG Yu-lin, WANG Li, KONG Rui-xia, WANGXi-qing

2005, 18(3): 430-434.

[Abstract](1031)

Abstract:
The focal shiftof elegant sin-Gaussian beams passing through a lenswas studied using the Collin s formula. Itwas found that the axial intensity intensity of a focused elegant sin-Gaussian beam was nul.l The second-ordermomentmethod was used to derive the analytical formulas for both beam waist and t...

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2005 Vol. 18, No. 3