西南交通大学学报

MA Peisun, CAO Xi, ZHAO Qunfei

2006, 19(4): 407-414.

[Abstract](1659)

Abstract:
Gait designs were divided into two main categories: reference trajectory and natural dynamics.The former is based on walking data,central pattern generator or dynamic model.The latter is classified into passive dynamics and virtual model control.The advantages and disadvantages of the two main gait ...

Comparison of Performances of Two Magnetic Fluid Sealing Devices for Large Gap Magnetic Fluid Sealing

LI Guobin, SONG Shuncheng, CAO Xuejun, YANG Runtian

2006, 19(4): 415-418.

[Abstract](1629)

Abstract:
The magnetic flux concentrating performances of a magnetic fluid sealing device with opposite-pole teeth for a large sealing gap were numerically investigated with FEM(finite element method) and compared with those of a traditional magnetic fluid sealing device with single-side pole teeth.The result...

Governing Equations for Coupled Thermo-Hydro-Mechanical Behaviors in Unsaturated Rock Mass

HE Yulong, YANG Lizhong, YANG Jiyi

2006, 19(4): 419-423.

[Abstract](1494)

Abstract:
To study responses of unsaturated rock masses to coupled THM processes,the governing equations of coupled THM behaviors in unsaturated rock masses were derived by using the equivalent continuum model.The governing equations include those for thermal,hydrological and mechanical fields,and are based o...

Variation Laws and Computational Methods of Surface Subsidence Prediction Parameters

LI Yongshu, XIAO Linping

2006, 19(4): 424-428.

[Abstract](1412)

Abstract:
To reasonably determine prediction parameters in a surface subsidence model for an underground non-bedded shape room environment,the internal relations between prediction parameters and underground room shapes were analyzed based on the principles of surface subsidence.In addition,the variation laws...

Ocean Tide Loading Corrections in GPS Precise Positioning

CHEN Xiandong

2006, 19(4): 429-432,441.

[Abstract](1286)

Abstract:
Based on the theory of site displacement due to ocean tide loading,the site displacements of some IGS(International GPS Service) stations resulted from ocean tide loading were computed respectively using the data given by the Onsala Space Observatory of Sweden and the National Astronomical Observato...

Energy Dissipation and Velocity Distribution of Internal Soliton Encountering Submerged Triangular Obstacle

CHEN Chenyuan, HSU Rongchung, CHEN Chengwu

2006, 19(4): 433-437.

[Abstract](1595)

Abstract:
Internal solitary wave(ISW) propagation is influenced by some physical factors.The most important factor of all is topography seabed in the ocean.Due to difficulties in field investigation,a wave flume was produced and tests were carried out to observe ISW propagation in the laboratory.The research ...

Contents and Approach of Fire Scenario Design in Performance-Based Fire Protection

CHEN Junmin, ZHENG Xuesong, FU Yongsheng

2006, 19(4): 438-441.

[Abstract](1280)

Abstract:
To raise the rationality of fire scenario design,the contents and approach of fire scenario design were presented in detail from the needs of performance-based fire protection,and the advantages and disadvantages of the main models for heat release rate of fuel usually used at present were analyzed....

Investigation into Screening,Identifying and Solid-State Fermentation of Cellulolytic Strains

ZHANG Jianqiang, LI Yalan, LI Yong

2006, 19(4): 442-446.

[Abstract](1218)

Abstract:
Twelve strains were isolated from putrid straw,wood,soil and cattle feces etc. They can grow in a solid medium with(sodium carboxymethyl cellulose) CMC-Na as an only carbon source.One strain of fungi,preliminarily identified as Neurospora sp.,with a strong ability to decompose cellulose was screened...

Distribution Regularity and Homogenization of Track Rigidity for Ballastless Turnout

CHEN Xiaoping, WANG Ping

2006, 19(4): 447-451.

[Abstract](1734)

Abstract:
To identify the variation rule of track rigidity of a turnout laying on ballastless track,based on FEM(finite element method) a calculational model for track rigidity was established.In the model,the flexural rigidity of rails,the rigidity of fastenings,the rigidity of subgrade,slide plate,guard rai...

Investigation into Computational Method of Self-Equilibrating Thermal Stresses in Concrete Bridges

PENG Yousong, QIANG Shizhong

2006, 19(4): 452-455.

[Abstract](1470)

Abstract:
An analysis was conducted to more accurately evaluate thermal stresses in structural members of concrete bridges.Based on theory of elasticity,a new method of evaluating self-equilibrating thermal stresses in concrete bridges was proposed.With this method,the transversal stresses are solved as a pla...

New Device for Grounding Resistance Measurement of Grounding Grids along Qinghai-Tibet Railway

FU Longhai, WU Guangning, WANG Hao, LI Jin

2006, 19(4): 456-459.

[Abstract](1410)

Abstract:
To reduce the cost in grounding resistance measurement of grounding grids along Qinghai-Tibet railway,a new grounding grid resistance measurement device was designed.When the measurement is conducted with the device,the earth surface voltage distribution is measured first to determine the spot where...

Support Vector Machine with Scaling Kernel and Its Application in Dynamic System Identification

HU Dan, XIAO Jian, CHE Chang

2006, 19(4): 460-465.

[Abstract](1551)

Abstract:
To improve the performances of dynamic system identification,a new method to formulate scaling kernel function for support vector machine was proposed.In the method,a compact support scaling function is derived first,and then based on wavelet multiresolution analysis a scaling kernel function with m...

Improved FFT-Based MP Algorithm for Signal Sparse Decomposition

SHAO Jun, YIN Zhongke, WANG Jianying

2006, 19(4): 466-470.

[Abstract](1651)

Abstract:
An improved FFT(fast Fourier transformation) based MP(matching pursuit) algorithm was proposed to reduce the calculation load in signal sparse decomposition.In the algorithm,a radix-2 FFT is performed to calculate the crosscorrelation, because the calculation speed is the fastest when the length of ...

Resource Integration Scheme for Networked Manufacturing Platform

WANG Shuying, YUE Hongwei

2006, 19(4): 471-475.

[Abstract](1155)

Abstract:
A resource integration scheme for networked manufacturing platform was proposed using the techniques such as dynamic register,dynamic discovery and dynamic reference of Web service in an integrated environment.In the scheme,there are release wizards with unified interfaces and templates for Web serv...

Coverage Criteria for GUI Testing Based on Directed Graph for Window Navigation

YE Mao, GAO Haichang, FENG Boqin, ZHU Li

2006, 19(4): 476-480.

[Abstract](1449)

Abstract:
To evaluate the adequacy of a test suite for testing a program with graphical user interfaces(GUI),new coverage criteria based on directed graph for window navigation was proposed.The vertexes in the graph represent windows of GUI,and the directed edges represent user inputs on windows.The graph mod...

Flexible Choice Strategy of Fuzzy Vehicle Routing in Urban Traffic under Uncertainty

ZHANG Yang, HUANG Qing, LI Jun

2006, 19(4): 481-485.

[Abstract](1528)

Abstract:
Based on the hypothesis of limited reason,a flexible strategy of dynamic vehicle routing problem with fuzzy travel time was presented through introducing the concept of decision-maker’s preference.A model was built for the flexible choice of vehicle routes with a certain departure time,and a heurist...

Routing Optimization for School Bus Problem

GUO Qiang, LI Lyo, GUO Yaohuang

2006, 19(4): 486-490.

[Abstract](1601)

Abstract:
A multi-objective nonlinear integer programming model was proposed to study the school bus problem.In the model,there are five objectives: to minimize the number of buses,to minimize total travel time of buses,to minimize total travel time spent by all children,to balance the loads among buses and t...

Selection of Routes for Avoiding Serious Accidents in Transportation of Hazardous Materials

WEI Hang, LI Jun, PU Yun

2006, 19(4): 491-495.

[Abstract](1310)

Abstract:
In order to avoid serious accidents in the transportation of hazardous materials,the condition against a serious accident was analyzed,i.e.,avoiding passing the route with a serious consequence as possible.A model for route selection was set up by taking population risk,average consequence and total...

Comprehensive Evaluation Approach of Road Traffic Safety Based on Artificial Neural Network

LI Xiangyong, TIAN Peng, JIANG Gefu

2006, 19(4): 496-500.

[Abstract](1638)

Abstract:
To enhance the validity of evaluation,based on ANN(artificial neural network),a comprehensive evaluation model of the safety of road traffic based on BP(back propagation) neural network was built.By the learning of some effective samples given,the extraction and storage of experts’ knowledge and exp...

Overbooking Model for Revenue Management of Ocean Shipping Containers under Stochastic Capacity

LI Bingzhou, WU Zhenye, BU Xiangzhi

2006, 19(4): 501-506.

[Abstract](1353)

Abstract:
To solve the revenue management-based overbooking problem of ocean shipping container position under stochastic capacity,an overbooking model without considering empty container transportation under stochastic capacity was constructed by applying the probability theory and the optimization theory.In...

Flight Conflict Detection and Regulation between Aircraft Based on Radar

WEI Guangxing

2006, 19(4): 507-511.

[Abstract](1778)

Abstract:
To avoid the air traffic collision,secure the flight safety and improve the air traffic controller’s capability to foresee and deal with flight conflicts,a radar-based coordinate system was established,and the concept of "horizontal detection" to foresee multi-traffic flight conflicts was brought fo...

Calculation Method of FANS Route Based on Ellipsoid Model

FANG Xuedong, HUANG Runqiu, WEI Guangxing

2006, 19(4): 512-516.

[Abstract](1301)

Abstract:
To improve the precision of area navigation,the formulas of calculating the initial course and route distance of an FANS(the future air navigation system) route was derived through spatial vector analyses.A simulation calculation was made by the Simpson numerical integral,and the simulated results o...

Approach of Fuzzy Multi-objective Decision-Making Based on Lattice-Order Preference

HAO Guang, MOU Qifeng, ZHANG Dianye, GUO Yaohuang

2006, 19(4): 517-521.

[Abstract](1663)

Abstract:
By using the lattice theory,the totally ordering description of scheme optimization was extended to the lattice ordering one.Based on the decision-making theory and the fuzzy set theory,the concept of fuzzy multi-objective lattice-order decision-making was put forward.By introducing the concepts of ...

Synthetic Evaluation Method Based Support Vector Classifier and Regression Machine

XIA Guoen, JIN Weidong, ZHANG Gexiang

2006, 19(4): 522-527.

[Abstract](1765)

Abstract:
To improve the synthetic evaluation and ranking abilities of machine learning methods,a support vector multi-classifier and a support vector regression machine were applied to the ranking of synthetic evaluation.By taking the evaluation of a management information system as an example,a contrast res...

Model of Dynamic Price Cap for Regulation of Electricity Market

JIANG Dongrong, LI Qunzhan

2006, 19(4): 528-532.

[Abstract](1374)

Abstract:
To overcome the difficulty in designing price cap for regulation of electricity market,a novel model,dynamic price capping model,was proposed based on British RPI(retail price index),American ROR(rate of return) and PCM(profit capping model).The determination of profit factor and the incentive mecha...

Existence and Blowing-up of Solution of Wave Equation

YANG Ning, MOU Peihong

2006, 19(4): 533-536.

[Abstract](1156)

Abstract:
The global existence of solution to the initial-boundary value problem of a nonlinear fourth-order wave equation with a damping term and a force source term was proved based on the standard semigroup theory and by introducing a modified energy function.The effects of nonlinear damping and force sour...

Traveling Wave Solutions to Kadomtsev-Petviashvili Equation

HU Yue, YANG Han

2006, 19(4): 537-540.

[Abstract](1405)

Abstract:
The generalized K-P(Kadomtsev-Petviashvili) equation with two parameters was studied.The existence of traveling wave solution of this equation was proved under some exponentially increasing assumptions for nonlinear term by using the mountain pass theorem without Palais-Smale conditions and correspo...

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2006 Vol. 19, No. 4