西南交通大学学报

Troubles in WastewaterTreatmentTechnologies and Countermeasures

YANG Shun-sheng, YEMei

2001, 14(1): 1-3.

[Abstract](1160)

Abstract:
Some issues encountered in modern wastewater treatment technologies based on activated sludges are summarized in this paper. It is pointed out that with the increasingly high requests on environmental quality from the society, the present technologies cannot fulfill the requirements of water area an...

The Corrosion and Protection of USAB Reactors

OUYang-feng

2001, 14(1): 5-7.

[Abstract](969)

Abstract:
Because of the chemical and biological reactions in an up-flowanaerobic sludge blanket (USRB) reactor, the inner surfaces of the UASB reactor are easy to corrode, so that the reaction efficiency and the service life of the reactor are decreased and the maintenance cost is increased. In this paper, b...

Study on Wind Resisting Performance of Long-Span Rigid Frame Bridge in Its Cantilever Construction Stage

ZHENG Shi-xiong, LIAOHai-li, ZHOUShu-hua

2001, 14(1): 8-11.

[Abstract](1641)

Abstract:
In this paper, the study is conducted around a three span prestressed concrete (PRC) continuous rigid frame bridge with a main span of 190 m and consisting of two parallelly-arranged roadway boxgirders. By wind tunnel tests of an aeroelastic model, the aerodynamic coefficients of the front and rear ...

Suppressing the Flutter of Suspension Bridges with Additional Surfaces Attached belowthe Trailing Edge Deck

LIUGao, WANGXiu-wei, QIANG Shi-zhong

2001, 14(1): 12-16.

[Abstract](1454)

Abstract:
A model of self-excited aerodynamic forces acting on a section of bridge deck with additional surface attached belowthe trailing edge is established. In the engineering background of a suspension bridge tender project, taking the bridge and the airflow as a whole system, the effectiveness of the sur...

Dynamic Analysis ofTrack Wave Propagation Supported on Continuous Elastic Foundations

WANG Ping, LIUXue-yi, LI Cheng-hui

2001, 14(1): 17-22.

[Abstract](1298)

Abstract:
A dynamic analysis model is proposed for the train/track system supported on continuous elastic foundations. The track wave propagation problem under a high-speed train is studied. The influences of some parameters, such as rail surface irregularitywavelength, trackmass, track rigidity and track vis...

A DeterminationMethod of Soil ShearModulus in Pile Foundation

HUDe-gui, LUO Shu-xue, ZHAO Shan-rui

2001, 14(1): 23-26.

[Abstract](1348)

Abstract:
Based on the comprehensive analysis of currently used three methods for calculating soil modulus in pile foundationi.e., laboratory test, empirical correlation based on previous experience and back- figuringmethod from pile-loading test, a new simple approach to compute soil modulus by back analysis...

Analysis of Seismic Dynamic Response ofHydraulic Turbines under WaterMedium

YUJian-hua, WEI Yong-tao, CAOJian-mian

2001, 14(1): 27-32.

[Abstract](1602)

Abstract:
The seismic response of hydraulic turbines underwatermedium is the typical coupled vibration of liquid-elastic body. To begin with, this paper briefly introduces the theory background and computation method about dynamic behavior of turbines in water, then focuses on discussing the dynamic governing...

Research on Stabilizing the Railway Roadbed with Improved Urea-Formaldehyde-Resin

ZOUBin, SHENRu, QILin-lin

2001, 14(1): 33-36.

[Abstract](1197)

Abstract:
Macromolecule materials are added into urea-formaldehyde-resin to decrease its brittleness and contractility, and increase its water-resistance. The improved urea-formaldehyde-resin in liquid form is injected into soil. With the cross-polymer solidification happening in the soil, the soil is strengt...

Toughening Analysis of Mixed-ModeⅠ-ⅡCracks in Transformation Toughened Ceramics

NIXin-hua, LIUXie-quan, LUXiao-bo

2001, 14(1): 37-40.

[Abstract](1143)

Abstract:
By use of the pressure sensitive stress criterion and the method of weight function, the fracture toughness enhancement induced bymixed modeⅠ-Ⅱcracks in phase transformation toughened ceramics is predicted theoretically. The theoretical expressions for the toughening effects of both the stationary a...

Electronic Orbit in the Longitudinal WigglerMagnetic Field

GONGJian-min, TANGJin-sheng

2001, 14(1): 41-43.

[Abstract](1000)

Abstract:
The motion equation of electrons in an axial uniform magnetic field and a longitudinal wiggler magnetic field is solved. The strict analytical solution of the electron velocity is derived in the rectangular coordinate system, and the approximate solutions of the electron position in the rectangular ...

Analysis of Suspension Force of the EMSMaglevTrain

HUJi-shi

2001, 14(1): 44-47.

[Abstract](1359)

Abstract:
The suspension system is one of the most important subsystems in the maglev train. Its performance will influence the performances of the train directly. The suspension force is the basis of track or bridge girder design and track dynamic analysis. Based on the characteristics of the EMSmaglev train...

Data Transmission by Induction Coupling and Its Application inMaglevTrain Communication System

YANGJian-yong, LIANJi-san

2001, 14(1): 48-52.

[Abstract](1329)

Abstract:
The moment method is applied to two arbitrarily located parallel wires, and the current distribution, self-impedance and mutual-impedance are obtained. An equivalent two-port network is used to get the inductive voltage of each wire. Meanwhile, the variation of coupling strength with distance is ana...

Design and Accomplishment of a Real Time Walkthrough System in Virtual Architecture Environment

CHENHua-bin, WANGDan

2001, 14(1): 53-56.

[Abstract](1359)

Abstract:
The application of virtual reality in architecture is a very hot topic. In a walkthrough system, a user can observe the architecture in different view interactively. This paper discusses the characteristics and requirements of a real time walkthrough system. It also discusses the method of modeling ...

CoordinatesTransformation of Engineering Drawings for 3D Reconstruction from Orthographic Views

ZHANGAi-jun, ZHUChang-qian, WANGJi

2001, 14(1): 57-61.

[Abstract](973)

Abstract:
Coordinates transformation of engineering drawings is the basis process for 3D reconstruction from orthographic views. In this paper, amethod is presented for segmenting engineering drawings into views and establishing the corresponding relations of coordinates between them. Two sets of 2.5D coordin...

Dedicated Short Range Communication and Its Application inTraffic Navigation System

XIENing-bo, GUYan

2001, 14(1): 62-66.

[Abstract](1164)

Abstract:
This paper describes the concept, development, system structure and communication process of the special dedicated short range communication (DSRC). It also analyzes DSRC’s standard, characteristics, and main points of design, and introduces the DSRC’s application in traffic navigation system, with ...

A Criterion for EvaluatingTiltingTrains Return Safety

NI Wen-bo, WANGKai-wen

2001, 14(1): 67-70.

[Abstract](1675)

Abstract:
The return angle stiffness of tilting mechanism can be taken to judge the return safety of tilting trains is put forward. Return angle stiffness describes the stability of car-body returning to neutral position when tilting mechanism loses power during the car-body tilting. When the return angle sti...

Study on EvaluatingMethods for Human Exposure to Whole-Body Vibration of Automotive Ride

WANLi-xang, XUMing-heng

2001, 14(1): 71-74.

[Abstract](1272)

Abstract:
The characteristics and existing problems of ISO standard 2631 and absorbed power method, which are the currently most popular methods for evaluating human exposure to whole-body vibration in automotive ride, are discussed in detail. The theoretical analysis based on an automotive mechanics model as...

On Approximation Properties of the Modified Lupas-Baskakov Integral Operators

TIANJun, WANGLi, GUO Yao-huang

2001, 14(1): 75-79.

[Abstract](1052)

Abstract:
A modified Lupas-Baskakov integral operator, which compounds Lupas operator and Baskakov operator, is introduced in this paper. By analyzing and researching the properties of the modified Lupas- Baskakov integral operators, the paperobtains theVonorovskya asymptotic formula, establishes the saturate...

AMultiscale EstimationMethod of Signal Based onMultiple Threshold Processing

HUChang-liu

2001, 14(1): 80-83.

[Abstract](1312)

Abstract:
A multiscale estimation method of signal based on multiple threshold processing is presented. First, the original measurement signal is decomposed with multiscale wavelet transform. Then the detail signals on each scale are further decomposed into sub-detail signals and sub-smoothing signals which a...

ANew Solution to Structural Fuzzy Finite Element Equations Based onMonosource Fuzziness

LIUChang-hong, CHENQiu

2001, 14(1): 84-87.

[Abstract](1177)

Abstract:
Considering that a fuzzy number can be decomposed into a real number and a unit fuzzy number under the monosource of fuzziness, a newmethod to solve fuzzy finite element equations is presented. The procedure of this method in solving a fuzzy finite element equation is firstly to separate the fuzzy f...

Study on Forecast of the PassengerTraffic Volume ofHigh-Speed Railways

LENGJun-feng, LUFeng-shan, WANGMei-yun

2001, 14(1): 88-91.

[Abstract](1633)

Abstract:
The influence factors of passenger traffic volume and the role of railway passenger transportation in our country are analyzed. Amethod of forecasting the high-speed railway passenger traffic volume in the condition of market economy is put forward,i.e., to forecast the total traffic volume first, t...

A Study onTransportation Price Regulation Arrangement Based on the Optimal System Profit

SHUAIBin

2001, 14(1): 92-95.

[Abstract](1333)

Abstract:
The shipper and the transportation enterprise are considered as a maximum profit system, but a reasonable and justified transportation arrangement must be searched out in order that both the shipper and the transportation enterprise can reach their maximum profit goals and be accepted by the market....

Forecasting the Bid of Engineering Projects with Fuzzy Similar-Priority Comparison

WANG Shun-hong

2001, 14(1): 96-99.

[Abstract](1376)

Abstract:
Bidding is a battle of wits. If a bid is too high, the contract cannot be got, what’s more, the time, manpower andmoneythathave been spentforbidding arewasted. In contrast, ifone bidsmuch lower than his rivals, he obtains the contrast, but he“leavesmoneyon the contrasttable”. Therefore, a good bid m...

A Synthesized Method for Group sMultiple Objective Decision-Making

ZHOUWen-kun, WUZhen-ye, JUTing-ying

2001, 14(1): 100-103.

[Abstract](1335)

Abstract:
This paper discusses group s multiple objective decision-making problem. Using least square method as a tool and Lagrange function as algorithm, it establishes the optimizationmodel that determine the weight of index by synthesizing subjective and objective information. Meanwhile, this paper gives t...

Study on Flexible Decision-Making-Oriented Organization Design under Agile Manufacturing Environment

CHENXu, WUZhen-ye

2001, 14(1): 104-108.

[Abstract](1280)

Abstract:
Flexible decision-making and its implement under agile manufacturing environment depend on organization for support. This paper beginswith the review and analysis of modern enterprises’organization structures, and then describes the agile manufacturing enterprises’organization structure. Based on th...

WaveletTransform and Its Application in StockMarket Data Analysis

XIANGXiao-dong, WANG Qing, GUO Yao-huang

2001, 14(1): 109-112.

[Abstract](1366)

Abstract:
Alipschitz exponentα, which reflects the singlaritynature of stock data, is obtainedwithwavelet transform and muti-scale analysis by regarding stock day profit ratio as a one-dimentional time signal.αin this paper is negative, showing that the singularity is more singular than non-continuum. This pr...

Search Advance Search

Journal Search

Search Type

NewsMore

instruction for authors

Read this journal

LinksMore

2001 Vol. 14, No. 1