西南交通大学学报

Axioms for Lattice Ordered Decision-Making Behavior and Relative Utility Theorem

GUO Yao-huang, LIUJia-cheng, ZHOUWen-kun

2001, 14(3): 221-224.

[Abstract](1235)

Abstract:
In this paper, the connectivity (completeness) axiom and the continuity axiom inVonNeumann- Morgenstern Rational behavior axioms are weakened. Then, a set of axiom for lattice ordered decision- making behavior, which can describe the decision-making behaviormore rationally, is constructed. At last, ...

The Problem ofφ-Frequency Closed Itemset Mining and Its Algorithm

LITian-rui, XUYang, PANWu-ming

2001, 14(3): 225-228.

[Abstract](1201)

Abstract:
Association rule mining is an important research area in data mining, andφ-association rule mining is one of its generalizations. Based on closed itemset, a problem of ((frequent closed itemset is studied, which is a substitute of the problem ofφ-association rule mining. Also, a mining algorithm is ...

Generalization of the Accurate Hayman Inequality

TANGLin-yong

2001, 14(3): 229-231.

[Abstract](824)

Abstract:
The accurateHayman inequality is generalized in this paper based on theNevanlinna theory. The constants of the counting function in the original inequality are converted into a transcendental entire function to obtain another form of the Hayman inequality.

Multi-Attribute Group Decision-Making Method under Fuzzy Preferences

ZHOUWen-kun, WUZhen-ye, LIUJia-cheng

2001, 14(3): 232-234.

[Abstract](1241)

Abstract:
Fuzzy and multi-attribute conditions exist widely in the decision-making environments. It has been research interesttomake the two complex conditions be a simple and distinct relation, the theory about which, however, is not satisfactory. In this paper, the properties of consistent matrix under fuzz...

A Study on Development Strategies of Passenger Traffic in Metropolises of China

CHENShang-yun, GAO Shi-lian

2001, 14(3): 235-239.

[Abstract](1276)

Abstract:
The distance distribution of urban-trip volumes is estimated by utilizing Erong distribution model as a basis of the study on development strategy of passenger traffic in metropolises of china. By quantitatively and qualitatively analyzing the characteristics of different traffic modes, the methods ...

Design and Implementation of an Adjusting System of Computerized Train Graph Systems

NIShao-quan, L Hong-xia, LIUJi-yong

2001, 14(3): 240-244.

[Abstract](1420)

Abstract:
The adjusting system is an important subsystem of a computerized train graph system that is a technique to meet the requirement of the market economy. In this paper, the functions of the adjusting system are discussed, and the detailed design and optimization of its graphic visualization of the soft...

Study on Rational Distance between Stations of High-Speed Railways

LIUhua

2001, 14(3): 245-249.

[Abstract](1914)

Abstract:
To begin with, the distribution of stations of high-speed railways in foreign countries and in China, such as Beijing-Shanghai high-speed railway and Qinghuangdao-Shenyang passenger special line, is introduced. Then, based on this, the rational distances between stations of high-speed railways are a...

Research on thep-Center Location Problem Based on Service-Oriented Logistics Strategy

YUANQing-da, CHENXu-mei, LIQing-song

2001, 14(3): 250-254.

[Abstract](1367)

Abstract:
This paper begins with an introduction of the concepts of logistics strategy and graph center. Then, for the service-oriented logistics strategy, it abstracts the location problem of multi-distribution centers in large-scale distribution network as ap-center problem of graph, and proves that both ve...

Comparison of Mental Workload Evaluation Techniques Based on the Driving Environment with Navigation System

WANGDong-guang

2001, 14(3): 254-257.

[Abstract](1146)

Abstract:
For pilots and drivers in ITS (intelligent transportation system), the high density of information in driving environments with advanced technology generates some requests for workload evaluation techniques. In this paper, four typical subjective mentalworkload evaluation techniques are reviewed. Wi...

Dynamic Behavior of Structure-Liquid System of Hydraulic Turbines

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

2001, 14(3): 258-263.

[Abstract](1473)

Abstract:
This paper discusses the free vibration governing equations of a coupled systemwith the emphasis on the calculation of dynamic water pressure vectors and the added mass matrix. It also makes a brief introduction about the solution of the dynamic behavior of structures under water medium. The calcula...

A Laboratory Study on the Effect of Axle-Load on the Wear of Wheel and Rail on Tangent Track

JINXue-yan, WANGXia-qiu

2001, 14(3): 264-267.

[Abstract](1298)

Abstract:
The railwaywagonwith different axle-loads running on 60 kg/mPD-1 tangent rail is simulated in laboratory, and the effects of axle-load on the wear of wheel and rail are analyzed. Experimental results showthatthewearratioofwheel and rail under25 t axle-load is obviously largerthan thatunder21 t and 2...

A Channel Borrowing Assignment Strategy with Directional Locking in Mobile Communication Systems

FANGXu-ming, ZHUChang-qian, FANPing-zhi

2001, 14(3): 268-271.

[Abstract](1260)

Abstract:
The authors propose an optimized compact pattern based channel borrowing assignment (CPCB) strategy, that is, the compact pattern based channel borrowing assignment strategy with directional locking (CPCBDL). This strategy notonly introduces the advantage of directional channel locking concept, but ...

Study on Fault Diagnosis of Sliding Bearings Using AE Signals

QINPing, YANBing, TANDa-ming

2001, 14(3): 272-275.

[Abstract](1217)

Abstract:
Acoustic emission (AE) is used to detect contacting fault of sliding bearings. The contacting fault was simulated on a sliding bearing bygradually reducingthe oil supply until no oil being supplied. AE signalswere recorded during the simulation for analysis. The results indicate that AE signals are ...

AnM-Band Wavelet Base Construction Method and Its Application

HE Zheng-you, LIUZhi-gang, QIANQing-quan

2001, 14(3): 276-280.

[Abstract](1422)

Abstract:
The traditional wavelet transform has some limitations in analyzing transient signals, which are accompanied by high frequency carriers. These limitations can be overcome byM-band wavelet transform. The construction conditions ofM-band wavelet base are discussed. Then, a newM-band wavelet base const...

A Fault Diagnosis of Dynamic Systems Based on Unknown Input Observer Schemes

WANGJue, LI Zhi

2001, 14(3): 281-285.

[Abstract](1350)

Abstract:
The principle and design procedure of unknown input observer schemes for fault diagnosis of dynamic systems are described in this paper. For discrete linear time invariant systems, detailed deduction is given to the algorithm of observer design based on the Kronecker canonical form transformation of...

Maximum Superiority Searching Method

GONGHui, QIANG Shiz-hong

2001, 14(3): 286-290.

[Abstract](1395)

Abstract:
Amaximum searching method, specially designed for searching strategies of expert systems, is presented in this paper based on the study of half scenery method. Avoiding unnecessarily obtaining the existencesituations of all the original data nodes of”OR”type required by half scenery method, the maxi...

The Application Technology of VRML to Distant Graphic Education Software

WENJun-wen, FENGKai-ping

2001, 14(3): 291-293.

[Abstract](1294)

Abstract:
With practical examples of implementation, this paper introduces the key techniques of virtual reality in simulating real scene, real-time interactive behavior and constructing interactive interface based on web. The situation that users can only do their learning by passively following the model an...

Study on the Nonlinear Dynamic Behavior of Tall Piers of Railway Bridge

SHENHuo-ming, XIShao-zhong

2001, 14(3): 294-298.

[Abstract](1293)

Abstract:
The nonlinear partial differential equations forthe tall piervibration of railwaybridges are derived by taking the influence of geometric nonlinearity into consideration, i.e., considering the nonlinear term caused by the direction change in axial forces and internal forces. Based on the analysis of...

A Review of Aerodynamic Admittance Functions of Bridge Structures

JIANG Yong-lin, LIAOHai-li, QIANG Shi-zhong

2001, 14(3): 299-302.

[Abstract](1545)

Abstract:
Buffeting responses of structures are excited by buffeting forces, which are determined by the aerodynamic admittance function (AAF) of structures and power spectrumdensity of turbulence., the Sear’ s function, which is based on the strip assumption, fails to accountforthe coherence ofthe turbulence...

An Accurate Calculation Method for Erecting Curves of Wire Strands of Long Suspension Bridges

TANGMao-lin, SHENRui-li, QIANG Shi-zhong

2001, 14(3): 303-307.

[Abstract](1484)

Abstract:
According to the conditions and practices of suspension bridge erection, a method is proposed for accurate calculation of erecting curves of wire strands of long suspension bridges. By analyzing the conditions of equilibrium on the saddleswhile the wire strands are being erected, the theoretical cal...

On Ecological Environment Problems and Effects Caused by Discharge from Huayingshan Tunnel

LIUDan, YANGLi-zhong, YUSu-jun

2001, 14(3): 308-313.

[Abstract](1317)

Abstract:
On the basis of author’s two on-the-spot consultant experiences and the collected data, this paper discusses ecological environment problems, such as groundwater resources loss, poor coal-measure water intrusion and hydrologic cycle unbalance, which are caused by discharge from the tunnel, and their...

The Coupling Interaction of Groundwater-Soil-Rock Mass in Karst Collapse Evolution

WANGJian-xiu, YANGLi-zhong, HEJing

2001, 14(3): 314-317.

[Abstract](1420)

Abstract:
The physical and mechanical interaction of groundwater-soil-rock mass in karst collapse evolution is discussed elaborately and a coupling mode is established and studied. Analysis results show that the evolution of karst collapses connects closelywith the coupling interaction ofgroundwater-soil-rock...

The Analysis and Calculation of Starting Conditions for the Loose Matters to Form Debris Flow

BAI　Zhi-yong

2001, 14(3): 318-321.

[Abstract](1376)

Abstract:
According to the characteristic that most of the loose matters consolidate to a certain extent, the author studied the effects of the factors on the formation of debris flows, such as ditch grade, crest discharge, saturation resistance to shear and shear area of the loose matters. The discriminants ...

Model Test of the Effects of Geocells and Geonets on Subgrade Strengthening under Static Loads

CAOXin-wen, LUO Qiang, XUEShuang-gang

2001, 14(3): 322-326.

[Abstract](1482)

Abstract:
The mechanismof subgrade strengtheningwith geocells and geonets is discussed. To compare the effects of geocells and geonets on subgrade strengthening under static loads, full scale model tests were conducted for different subgrade structures. It is shown that geocells are better than geonets, altho...

Finite Deformation Analysis with Hybrid/Mixed Finite Element Method

ZUO De-yuan, CHENDa-peng

2001, 14(3): 327-331.

[Abstract](1410)

Abstract:
A modified Reissner-type incremental variational functional is proposed by adopting a updated Lagrangian description. The variational functional involves displacements and second Piola-Kirchhoff stress increments as independent variables. To enhance computational efficiency, the mechanical subelemen...

Statistical Analysis of Pile Ultimate Bearing Capacity and Pile Reliability

PENGXiong-zhi, LUO Shu-xue, ZHAO Shan-rui

2001, 14(3): 332-335.

[Abstract](1609)

Abstract:
Statistical analysis on the bearing capacity of 78 bored piles and 128 drilled piles and on the normalized parameters of these piles’end and side resistancewas carried out. It is found out by comparison that the ratios of the measured values to the calculated ones of the bearing capacity, the end re...

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2001 Vol. 14, No. 3