2001 Vol. 1, No. 2

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Speed up the Scientific and Technical Progress to Initiate a New Aspect for the Development of Western Region Highway Transportation in China
ZHANG Chun-xian
Abstract: The importance of speeding up the highway transportation development is discussed. The developing history of highway transportation in China is reviewed. It is pointed out that to speed up the scientific and technical progrees is the basis of developing highway transportation. Three kinds of trend and five subjects of scientific and technical research for highway transportation are summarized. Combined with the policy of developing Chinese western region, the inadequacy and weakness of highway transportation in Chinese western region are analyzed. The policy and plan of state government for supporting highway transportation development in western region are presented. According to the nature condition of western region, the key technology in developing highway transportation is outlined.More>
2001, 1(2): 1-7.
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A Brief Discussion to the Development of Feeder Aviation in China
GUAN De
Abstract: Two important aspects related to the development of feeder aviation are discussed briefly. The first is the development of regional economy, the second is the integrated optimization of the transportation system which form the market demand of the feeder aviation. It is pointed out that the development of the feeder aviation could only be progressive. Besides, the effects of reliability and life of the aircraft to the operating cost are also presented.More>
2001, 1(2): 8-9.
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On Selection of High-speed Technique for Beijing-Shanghai Railway
SHEN Zhi-yun
Abstract: The new advances of high speed railway techniques are reviewed. High speed railways based on wheel/rail contact are innovated day after day since its first initiation in 1964.In the same time, the magnetic levitated trains are also studied continuously in many countries.After a brief introduction of the development of these two kind of high speed railway technology in and outside China, a question has been raised: which technique to use for the Beijig Shanghai high speed railway? A detailed comparison between the wheel/rail and the magnetic levitation high speed techniques has been made. It is concluded that the later has superiority only in the case of speed higher than 400 km/h. The maglev technique is still in developing, and no single line commercially operated all over the world.Therefore, the wheel/rail typed high speed train of 300~350 km/h is the most feasible and most optimum choice for the Beijing Shanghai high speed railway.More>
2001, 1(2): 10-13.
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The Geometric Modeling of Vehicle-track Coupling System Based on Object-oriented Method
DING Guo-fu, ZHAI Wan-ming, ZHANG Zhi, WANG Kai-yun
Abstract: The visualization and 3-D modeling are introduced to vehicle track coupling dynamics system.Based on the core of computing module of vehicle track coupling dynamics, object oriented design, a feasible method of system design is presented, and its model explanation and identification are given.As a result, an integrated simulation system that the core of computing module connects with the output and input of system is finally built.More>
2001, 1(2): 14-17.
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Derailment Safety of Railway Freight Cars
WU Ping-bo, WANG Yong
Abstract: The main type of freight car in China is C62 and the study of its derailment safety is very important for railway transportations.By use of the dynamic simulation software, the dynamic model of the freight car is set up and the hunting stability and curving behavior of the freight car are analyzed.The loading of freight car on the running safety is investigated.More>
2001, 1(2): 18-20.
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Application of Independent Wheelsets on the Light Rail Vehicles
HUANG Yun-hua, LI Fu, ZHANG Li-ping
Abstract: An independent wheelset has such characteristics, well hunting stability, less wear, low yawp, light weight and easy operation equipped with full low floor, compared with the traditional wheelsets.Independent wheelsets have been widely used in light rail vehicles in recent years. A brief introduction to the development of the light rail vehicles at present and the traits of independent wheelset are given, and the application and development of independent wheelsets on the light rail vehicles are emphatically discussed.More>
2001, 1(2): 21-25.
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Application of Data Acquisition Card of Virtual Instrument Based on PCI Bus in Tilting Train Mesurement
CAO Jun, LIN Jian-hui, GAO Yan
Abstract: A data acquisition card of virtual instrument based on PCI bus is introduced, which is applied in the testing system of tilting train.The interface chip of S5933 is the pivotal part of the card followed by a special low pass filter.The signal of the acceleration and the orbit excess of the running tilting train can be exactly tested and filtered in time.By the test of the true run, the practicality and superiority of the card is proved.More>
2001, 1(2): 26-28.
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Manufacture of the Control System of Tilting Train Based on DSP
LI Wen-ying, CHEN Jian-zheng, LIN Jian-hui
Abstract: The tilting train is a new type train specially designed for railroad with extensive curves.When the train runs, the measurement and control system can test the state parameters of the railroad and the train and make a response in real time. At the same time, the measurement and control system must be provided with high processing speed and high precision. A measurement and control system based on Digital Signal Processors (DSP) is introduced.More>
2001, 1(2): 29-31.
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Study on Modular Design of Hybrid Electric Vehicles(HEV) Powertrain Test Bench
XIE Qi-cheng, WANG Dong, TIAN Guang-yu
Abstract: Test bench plays a strong role in the development of Hybrid Electric Vehicles (HEVs).On the basis of modular design methodology, a flexible powertrian system test bench is successfully designed to develop our various type of HEV powertrains.This paper deals with the method and process of the design, presents details on the designs for modules and manners to integrate them, and lastly testifies the flexibility of the bench.More>
2001, 1(2): 32-36.
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Some Questions in Intelligent Motorcar Systems Study
XIONG He-jin
Abstract: As a bran new concept and product, intelligent motorcar will become artery manufacture in motorcar production and market in short future. The concept and researching content, key technology and final aim of intelligent motorcar are discussed. The essentiality and pressure for studying intelligent motorcar in China are indicated.More>
2001, 1(2): 37-40.
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Study of Truck Rear Bumper Crashworthiness
FU Rui, CHEN Yin-san
Abstract: When passenger cars crash into the rear end of heavy trucks, the degree of cars occupants' injury and cars damages depends on weather the crashworthiness of the truck rear bumpers are good or not.The dynamic three dimensional non linear finite element methods are adopted to simulate the impact of truck rear bumper for the investigation of its crashworthiness.And some impact tests are carried out.Based on this, tubes' system is installed on the impact surface of the bumper horizontal beam as an energy absorption device to improve the beam's impact performace. Simulation and test results of the improved bumper show that this device leads the deceleration of the moving barrier crashing into the bumper decreased obviously.More>
2001, 1(2): 41-43.
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The Analysis of Orientation Mechanism about Friction of Elastic-metallic-plastic Pad
ZHAO Xin-ze, XIAO Han-liang, ZHOU Xin-cong
Abstract: In the case of steel sliding against elastic metallic plastic (EMP) pad, the orientation process, drawing PTFE chains oriented along the sliding direction, are observed on the surfaces of EMP and steel with electron microscope.Combined with the structure characteristics of PTFE molecular, the orientation mechanism are studied.More>
2001, 1(2): 44-46.
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The Status and Prospect of Transportation Machine Equipment Repairing in 21th Century
YAN Li, ZHU Xin-he, YAN Zhi-jun, XU Jiu-jun
Abstract: According to the present developing condition of transportation machine repairing, the status and prospect of transportation machine repairing in 21th century are analyzed. The challenge and developing tendency of the machine repainring policy and technology are discussed. Seveal developing strategies for the repairing ideology, inspecting and diagnosing technology are put forward.More>
2001, 1(2): 47-51.
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The Characteristics Transient of Emission of Spark-ignited Engines Based on the Measure of Symbolic Time Series Analysis
LI Yue-lin, SUN Zhu-kuan, ZHANG Yu, SHEN Wen
Abstract: Considering the difference between the transient emission and stable exhaust, the special measurement and analysis for the transient exhaust of combustion engine is needed. The characteristics of chaotic time series analysis, which are applied to the analysis on vibration signal of combustion engine by the authors of the paper, are reviewed. The research on analysis and identification of the transient data of combustion engine based on the symbolic time series analysis by foreign mates, which is developed from the symbolic dynamic theory, chaotic time series analysis and information theory, is present too. The abroad condition of development on test measures of transient exhaust is given. The thoughts, that the characteristics and influence factors about transient emission could be obtained by the transient emission signal analysis of spark ignited engines based on the symbolic time series analysis, are offered.More>
2001, 1(2): 52-56.
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On the Design Theory and Method of Continuously Reinforced Concrete Pavement(CRCP)
HU Zhang-shun, CAO Dong-wei
Abstract: Continuously reinforced concrete pavement (CRCP) is one of high performance concrete pavement structures. A systematic analysis on CRCP design principles is conducted. In the vehicle load stress analysis, the orthogonal anisotropic membrane model is established by treating the longitudinal bars as continuum, and three dimensional finite element analysis is carried out with considering transverse crack. Two critical load positions are found out. In thermal stress analysis, the calculation model and equilibrium differential equations are established on the basis of researching the bond slip constitutive relation between the reinforced bars and concrete. The analytic solution is derived to calculate the stress and displacement under the temperature drop and concrete shrinkage. The parameter's sensitivity and stress relaxation caused by concrete creep are analyzed. Using numerical methods and analytic methods, the anchor force at CRCP ends is calculated, and the displacement and stress of trech lugs are analyzed, the design parameters are recommended and the design nomograms are provided. The indoor model test is carried out to verify the theoretical values. The method for designing CRCP slab thickness, reinforcement and end structure is provided.More>
2001, 1(2): 57-62.
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Pavement Dynamic Characteristics Analysis
SHA Ai-min, JIANG Xiao-xia
Abstract: The moving vehicles dynamic model, pavement structure dynamic effects and materials dynamic parameters were analyzed, it provides the fundamental theory for further study of pavement dynamic excitation and response.More>
2001, 1(2): 63-67.
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The Maximum Longitudinal Slope and Its Length of Mountain-expressway under the Condition of Vehicle′s Driving Down
SHI Fei-rong, YANG Shao-wei
Abstract: In the construction of expressway in mountain area, the contradiction of the maximum longitudinal slope with engineering's volume and cost is very prominent. If the construction standard was executed strictly, the engineering volume of high fill and deep excavation will be very big, many long span bridges and tunnels must be constructed from the point of vehicle dynamics, and the maximum longitudinal slope and its length of mountain expressway under the condition of vehicle's driving down are analyzed. The concepts of ideal maximum longitudinal slope, general maximum longitudinal slope and the limitation maximum longitudinal slope are put forward. And their length is determined to provide a reference for highway designer.More>
2001, 1(2): 68-73.
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Research on Advanced Urban Traffic Control and Management System for China
YANG Xiao-guang, ZENG Song, HANG Ming-sheng
Abstract: The integrated system frame of a real time adaptive traffic control system called as CUTRACMS is developed. Based on the demand analysis, construction of the logic structure and physical structure, the mathematic model and algorithms are included.More>
2001, 1(2): 74-77.
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A Study on Estimating OD Trips From Observed Link Flows——Based on the Method of Iterative Procedure to Calculate OD on the Multi-path Assignment Model
LI Jing, PENG Guo-xiong
Abstract: A new iteration framework of estimating OD trips is established by a stochastic shortest path multi path assignment model to calculate the probability matrix P based on the two improved definitions of effective path and effective link.Meanwhile a hypothesis argumentation is put forward to examine the feasibility and rationality of the iteration method.Then the factors of influencing result of estimation are discussed.Finally two important conclusions resulted from P are obtained.More>
2001, 1(2): 78-82.
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A Highway Network Planning Approach Based on Objective-evaluation Analysis
CHEN Xiao-hong, LIN Hang-fei
Abstract: Aiming at the characteristic of highway network planning, a planning approach is presented, which adopts objective evaluation analysis as its core in network planning.The approach combines with several advantages of existing planning methods, analyzes the economy, traffic and resources in the planning area, and applies planning objectives as the guidance of infrastructure planning and uses the procedure of defining network construction scale layout route node as a comprehensive planning method, which based on the traffic volume forecasting results and project evaluation.Taking the freeway and trunk network planning in Shanghai as an example, the technical process, objectives, principles of network layout and technical evaluation framework of the planning are put forward.More>
2001, 1(2): 83-87.
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A Comprehensive Review of Road Traffic Simulation Research
ZOU Zhi-jun, YANG Dong-yuan
Abstract: The concepts of system simulation, computer simulation and traffic simulation are presented, and the development process and trend of road traffic simulation research in other countries are also introduced, as well as the existing research status in China.Furthermore, the significance of the road traffic simulation research is analyzed and the conceived research plan is put forward.More>
2001, 1(2): 88-91.
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A Traffic Signal Control Method Based on Fuzzy Logic Controller at Urban Road Intersection
WEI Wu, ZHANG Qi-sen, WANG Ming-jun, HUANG Zhong-xiang
Abstract: A traffic signal control method using fuzzy logic controller in urban road intersection is proposed.It is not needed to build the traffic flow model for signal control approach in the intersection using the method based on the fuzzy.However, this method can effectively solve the stochastic and unknown problems in this dynamic system. A GA of weighted coefficient is adopted to optimize the parameters of fuzzy logic controller.The experimental simulation results show that fuzzy logic controller can be successfully applied in traffic signal control for urban road intersection.More>
2001, 1(2): 99-102.
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Variable Structure Robust Control Algorithm for Uncertain System with the Absence of Matching Assumptions
YANG Yan-sheng
Abstract: Based on the method for constructing sliding mode hyperplane with the solution of the algebraic RICCATI equation of normal system, a variable structure robust control algorithm with continuous performance and globally practical stability with respect to the sliding mode of the system is presented for a class of uncertain MIMO systems with the absence of matching assumptions.An example illustrating the method described is included.More>
2001, 1(2): 103-107.
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The Influence of Modern Information Technology on Nautical Field
ZHAO De-peng, LI Yi-fan, ZHAO Li-ning, LI Yuan-hui, LI Guang-ru
Abstract: Based on Internet, 3S (GIS, GPS and RS), digital earth, digital ocean and some other information technologies, the influence of modern information technology on nautical field is analysed, and the information system framework which affects the nautical field in future is discussed.More>
2001, 1(2): 108-110.
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A Heuristic Algorithm for p-Center Problem Based on Combining Operations on Center Graphs
LI Qing-song, DU Wen, YUAN Qing-da
Abstract: The heuristic algorithm given in this paper, which is based on Combining Operations on Center Graph (COCG), lowers the complexity of calculation, and its result is more closer to the optimization than available algorithms from the appliance.More>
2001, 1(2): 111-113.
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Economic Analysis of Transportation Demand
WU Qun-qi
Abstract: On the basis of consumer surplus theory, the idea that transportation supply quality and price should be decided on the premise of demanders' benefits is put forward. Hence, a measurement model for transportation demand economic cost is established, and qualitative analysis for the structural factors of the model and its influent as on the consumers' economic cost is conducted. The analysis shows that the actual influence of transportation price on both suppliers and demanders is dissymmetrical. Because of this, it is not good to analyze the supply-demand balance laws from the view point of prices. The fact is that the higher the value of transportation goods, the smaller the influence on transportation economic cost in its transporting process.More>
2001, 1(2): 114-119.
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An Entry/Deterrence Model of Duopoly in Port Competition
SHI Xin
Abstract: As the sequence of different competition strategy are different in port competition, an entry/deterrence model of duopoly to disclose the internal mechanism in port competition is developed.More>
2001, 1(2): 120-123.
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Some Problems for the Development of Freights Forwarders of Road Transportation in China
LI Xian-sheng, ZHOU Ru-bo, GAO Yan-ling
Abstract: Based on the analysis of legal nature, legal liabilities, effect and existing main problems of freights forwarders of road transportation in China, according to the recently information, some suggestions for the development of freights forwarders of road transportation in China are put forward.More>
2001, 1(2): 124-126.
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