西南交通大学学报

Method for Predicting Internal Combustion Engine Emission under Steady Operational Condition

ZHOU Bin

2004, 17(2): 135-138.

[Abstract](1750)

Abstract:
To predict the emission characteristic of a combustion engine working under its normal operational condition, the emission preeiction neural network was established. It has non-linear simulation ability, combines the advantage of experiment with simulation, and uses some representative parameters av...

Three Dimensional Modeling and Numerical Simulation of Axial-Flow Pumps

YANG Chang-ming, CHENCi-chang, WANGJin-nuo

2004, 17(2): 139-141.

[Abstract](1814)

Abstract:
To automatically generate the 3D model of axial-flow pumps, a parametric modeling method based on AutoCAD and VB was proposed. Based on the COM interface of AutoCAD, the impeller of an axial-flow pump was modeled by connecting the hydraulic model database throughADO and by usingVB as programming lan...

Seismic Responses of RC Frame Structures with Special-Shaped Columns and Girder-Transfer Story

ZHANGXin-pei, SHUTao, ZHAO Yong, HUHong-wei

2004, 17(2): 142-146.

[Abstract](1659)

Abstract:
High rising buildings with a large bay supermarket on their two lowest stories and dwelling houses on the other stories were taken as the discussed object. Based on the relative national design codes and their engineering conditions, seismic responses of 72 high rising buildings of RC frame structur...

Simplified Algorithm of Structural Reliability Index under Condition of Correlated Variables

LIBin, YANSong-hong

2004, 17(2): 147-151.

[Abstract](1547)

Abstract:
Based on the geometrical meaningof structural reliability index, the direct iteration calculation of a nonlinear function under the condition of correlated variables was discussed by using coordinate transformation and matrix operation. The calculation formulas based on the contribution value method...

Experimental Research on Bamboo-Truncating Tunnel Portal for Single-Track Railway

CHENG Gang, QIUWen-ge, GAOXin-qiang

2004, 17(2): 152-156.

[Abstract](1788)

Abstract:
Model experiments with a geometric similarity ratio of 1∶30 were carried out to investigate the ground pressure and internal force of up and down bamboo-truncating tunnel portals for single-track railway. In these experiments, grade of up-slope and crossing angle between portal and railway center li...

Artificial Neural Network Forecast Model for Slope Deformation of Large-Scale Dry-Doc

GUANQin-chuan, ZHANG Zhi-yong, FENGHao

2004, 17(2): 157-161.

[Abstract](1652)

Abstract:
Factors influencing the deformation of a dry-dock slope were analyzed. They are soil mass strength, time of non-protection slope, gradient of slope, number of layout excavation, depth of layout excavation, excavation step, rainfall depth and load on slope top. Based on the above and the typical defo...

Railway GIS Model Based on Three-Tiered Architecture

HUANG Ze-chun, HUANGDing-fa

2004, 17(2): 162-166.

[Abstract](1466)

Abstract:
Based on the analysis of application modes of geographic information system (GIS), the basic idea and characteristics of three-tiered architecture were presented, and an integrated application model for railwayGIS was proposed based on three-tiered architecture. Furthermore, the whole planning of ra...

Study on 3D Aerodynamic Admittance Function for Bridge Structures

LILi, LIAOHai-li, LIQiao

2004, 17(2): 167-171.

[Abstract](1362)

Abstract:
The concept of aerodynamic admittance function(AAF) for the buffeting analysis of structures was interpreted. Based on the discussion of AAFs used currently, their limitations were pointed out. The mathematical expressions of admittance functions suitable forthin plates in different conditionswere d...

Comparison of Three Models for Vehicle-Bridge Coupled Vibration Analysis

XIAOXin-biao, SHENHuo-ming

2004, 17(2): 172-175.

[Abstract](1879)

Abstract:
Three models for vehicle-bridge coupled vibrations, namely moving mass model, two-degree-of freedom vehicle model and four-degree-of freedom vehicle model, were derived using the D Alembert s principle and the hypothesis ofEuler-Bernulli beam. The dynamic responses of bridges tothe vehicle moving at...

Stability of Uncertain Linear Systems with Multiple Time-Delays

ZHANGKe-yue, CAO Deng-qing

2004, 17(2): 176-180.

[Abstract](1739)

Abstract:
A stability robustness criterionwas derived for uncertain linear systemswithmultiple time-delays by constructing a quadratic Lyapunov functional with an integral term. The robust stability bounds obtained are not necessarily symmetric to the origin in the parameter space, and can significantly enlar...

Fully Vectorial and Explicit Algorithm for Mould Filling

CHENG Zhi-qiang, Barriere T, Gelin JC

2004, 17(2): 181-185.

[Abstract](1684)

Abstract:
To meet the need of industrial application of mould filling simulation, a fully vectorial and explicit algorithmwas proposed on the basis of current explicit algorithms. For the simulation of different mould filling processes, the global solution for pressure field can be avoided by this algorithm, ...

Vendor-Purchaser Coordination and Quantity Discount Pricing Model in Supply Chain

MAZu-jun

2004, 17(2): 185-188.

[Abstract](1255)

Abstract:
Under the non-cooperative game, vendor and purchaser decide optimal lot size according to their own interests. One may be in an optimal condition, but the whole supply chain is not. To optimize the whole supply chain and attain the win-win goal, mutual optimal lot size models and the quantity discou...

Long Periodic Oscillation in Flight Caused by Low-Level Wind Shear of Thunderstorms

WANG Yong-zhong

2004, 17(2): 189-194.

[Abstract](1628)

Abstract:
A typical low-level wind shear of thunderstorm activates long periodic oscillation of an aircraft, causing tracking deviation of the aircraft. On the assumption that thewind shear is sinusoidal, the effects of long periodic oscillation on the landing path of an aircraft were studied by computer calc...

Passenger Volume Forecasting of Guangzhou-Zhuhai Intercity Rapid Mass Transit

MAO Min, ZHANGJin, ZHOUHou-wen

2004, 17(2): 195-198.

[Abstract](1640)

Abstract:
Based on the analyses of the role, functions and passenger flow characteristics of Guangzhou- Zhuhai intercity rapid mass transit, the basic idea that intercity mass transit should be taken as a regional passenger corridorwas proposed, and the technical route of passenger volume forecasting based on...

Development of Train out Report Subsystem of Railway Sub-administration Dispatch System

SHIHong-guo, PENG Qi-yuan

2004, 17(2): 199-202.

[Abstract](1277)

Abstract:
A train out report subystem was developed with Java according to the requirment of sub- administration dispatch system of TMIS (Transportation Management Information System) and the final users. The subsystem has the necessary functions such as inquiry, display, sorting, update, forward and printing...

Analysis of Starting Process of PMSM Servo System

CHENRong, DENG Zhi-quan, YAN Yang-guang

2004, 17(2): 203-208.

[Abstract](1451)

Abstract:
Based on the vector control principle of permanent magnet synchronous motor (PMSM), the current, voltage and rotating speed and their influencing factors of the motor in the starting process was analyzed. The linear speed-up phase in the starting process basically determines the starting time, and i...

Characteristic and Control of Time Delay in Field Bus Control System

ZHANGXiang, XIAOJian, LIANJi-san

2004, 17(2): 209-212.

[Abstract](1522)

Abstract:
The characteristic of the transmitting delay of forward and feedback channels were analyzed. According to theworkingmodes of actuators, a linear control object is converted into time-driven and event- driven discrete time models. Two control methods for field bus control system were proposed. The fi...

Group Method for Realization of Spherical Basis Functions

ZHAOLiu, ZHUFeng, BAIXiao-bo

2004, 17(2): 213-216.

[Abstract](2075)

Abstract:
Based on the geometric feature of spherically symmetric structures, a 3D rotation group, SO3, was constructed. By applying the group theory of complete set of calculation operators, the classified basis functions of this group,i.e.the spherical functions, were obtained through group transformations,...

Development of Flickermeter and Application in Electrified Railways

HEJian-min, HUANG Zhi-qing, LIQun-zhan

2004, 17(2): 217-221.

[Abstract](1475)

Abstract:
As an important index of power quality, flicker directly indicates the voltage quality of power supply. Based on the design specifications for flickermeters published by the International Electrotechnical Commission (IEC), the mathematical model and digitalization of flickermeter were discussed in d...

Quantum Fluctuations in Damped Inductive-Coupled Electric Circuit

LIANGMai-lin, ZHAOLin

2004, 17(2): 222-226.

[Abstract](1265)

Abstract:
Based on the physical mechanismof the generation of resistance,i.e.the collision of electrons with lattices, the inductive-coupled electric circuit was quantized when there exists resistance in the coupling part. Quantum fluctuations were calculated for both the component circuits and the coupling p...

Design of Optical Heterodyne Fiber Sensor to Monitor Dam Deformation

TANGJin-sheng, HUANGXue-mei, YANG Ru-gui

2004, 17(2): 226-228.

[Abstract](1261)

Abstract:
To meet the requirement of dam safety in hydroelectric power stations, a kind of optical fiber sensors was designed based on the optical heterodyne technique, and its properties were tested. The test result shows that the measure precision of this kind of optical fiber sensors can reach to 50 nmso a...

Forward Tracking of Errors in Video Based on H.26L

JIANG Zhi-ping, PENG Qiang, LI Yun-feng

2004, 17(2): 229-233.

[Abstract](1455)

Abstract:
The error concealment technique introduced in H.26l decoder is not very effective on error resilience of high-motion pictures. An approach,named forward error tracking, compatible with the ITU-T video coding standard H.26L was introduced to stop the error propagation. The approach codes those corrup...

Development of Computer Simulation System for Overhauling of Hydroelectric Generating Unit

CHENXiao-shan, LAIXi-de, LIUXiao-bing

2004, 17(2): 234-238.

[Abstract](1626)

Abstract:
In order to make the reasonable and effective technical schemes for overhauling and solve difficulties in training overhauling workers in hydroelectric power plants, a computer simulation system for overhauling of a hydroelectric generating unit was developed by combining computer-aided simulation, ...

Strategic Partner Selection in Agile Supply Chain

BUXiang-zhi, WANG Wen-bin, WUZhen-ye

2004, 17(2): 239-243.

[Abstract](1414)

Abstract:
A multi-object evaluation model was established for strategic partner partnership selection in agile supply chain management under changing and uncertain market conditions and solved using fuzzy AHP. The experiment results showthatthismethod is efficient. Finally, some suggestionswere raised about t...

Integrated System Model for Flexible Supply Chain

ZHANG Yun-bo, WUZhen-ye, YANG Cheng-lian

2004, 17(2): 244-247.

[Abstract](2783)

Abstract:
To determine the rational flexibility of a supply chain and improve its performances, the motivation for the emergence and evolution of a supply chain and its dynamic characteristic in its life cycle were systematically analyzed using supply-demand principle. The most important motivation is the dem...

New Viewpoint of Dissecting Bertrand s Paradox —Analysis of CournotModel withModified Hypotheses

SHIQi-kai, SHIKai-ge

2004, 17(2): 248-252.

[Abstract](1236)

Abstract:
The analysis of the general Cournot model shows that the reason for strengthening, instead of dissecting, the Bertrand s paradox lies in that its assumed preconditions are far away fromthe real economic conditions. For this reason, the assumed preconditions were modified as follows: the cost of olig...

Robust Stability Analysis for Interval DEA

ZHANG Shen-feng, WUYu-hua, GUOJun-peng

2004, 17(2): 253-236.

[Abstract](1594)

Abstract:
A new analysis method of robust stability analysis was proposed for general applications. In this method, the solution of the highest and lowest efficiency scores of each decision making unit (DMU) in an interval data envelopment analysis (DEA) is obtained firstly to determine the interval efficienc...

Research on Characteristics of Methane Generation in Simulated Bioreactor Landfill

YANG Qiao-yan, LIQi-bin

2004, 17(2): 257-260.

[Abstract](1297)

Abstract:
The effects of the following factors(measures) on the generation of methane in bioreactor landfill were investigated through a simulation experiment. These factors(measures) are leachate recirculation rate, leachate heating before recirculation and microorganism inoculating by mixing sludge with sol...

Analysis of Transfer-Probability Matrix of Repairable Series-Parallel System

NIUYu-qi, HEPing

2004, 17(2): 261-264.

[Abstract](1687)

Abstract:
From the fact that a series-parallel systemmade up of components has a complicated state space and transfer-probability matrix, the element classification and structural characteristic of the transfer- probability matrix of a series-parallel system with only a set of repair equipment were investigat...

Multicast Routing and Wavelength Assignment Algorithm for WDM All-Optical Networks

YUZhou-qiu, LIUSan-yang

2004, 17(2): 265-268.

[Abstract](1330)

Abstract:
The problems of multicast routing and wavelength assignment in all-optical networks were studied. Based on wavelength graphs, a multicast routing and wavelength assignment algorithm for wavelength convertible optical networks was presented. The proposed algorithm deals with the routing and wavelengt...

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2004 Vol. 17, No. 2