2001 Vol. 1, No. 3

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The Development of Asphalt and Asphalt-concrete
SHA Qing-lin
Abstract: The grades of superpave asphalt in USA and the design method of its mixtures are introduced. The characteristics of asphalt concrete with coarse aggregate and gap gradation in different countries are presented. The utilization of SAC and SMA in China is discussed.More>
2001, 1(3): 1-6.
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The Basis Points for Developing Logistics in China
CHEN Yin-san, WU Qun-qi
Abstract: Logistics is the historical category. By the productivity developing, it becomes the jumbled serve system based on axes of the goods moving from the only goods moving. This paper analyzes the power or qualifications of logistics develop and the structure of logistics system, points out that to develop logistics we should choice the correct way by own situation character of the logistics, instead of blindly copy the model of modern logistics, because China is with a vast territory and unbalance of economy. To put on the logistics develop, we must correctly deal with the relations of each part, which make up of logistics system.More>
2001, 1(3): 7-10.
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Analysis of Dynamic Characteristics of Independently Rotating Wheels
LI Fei, HUANG Yun-hua
Abstract: Compared with traditional wheelsets, independently rotating wheels have high critical speed and well curving performance on the ideal line without interfer, since independently rotating wheels have no logntitudinal creepage between wheel and rail.But in the application, just about that reason, independently rotating wheels produce flange contact because performance of running to the center decline in the straight track and can but depend on flange to guide in the curve. The application and development of independently rotating wheels are introduced.The problem awaited to be solved about independently rotating wheels are put forward by computer simulation.More>
2001, 1(3): 11-14.
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The Structure Analysis about Continuously Welded Rail in Special Railway Section
LIAN Song-liang, ZONG De-ming
Abstract: The stability of the continuously welded rail (CWR) is very important for the railway operation, the strength and stability of the CWR in the special section of railway must be studied before designing and laying the CWR. The railway section between Jiujiang Bridge and Boshuihu Bridge administered by Nanchang Railway Administration, since the length of this railway section on the subgrade is less than 300 m desired by the maintenance codes, so the special design is needed for this CWR section. According to the CWR structure of this section, this paper puts forward two stress free temperatures, and two times to draw the long rail while the CWR laying. To ensure the need of stability and strength desired by the maintenance codes, some special maintenance measures are also put forward for this section CWR.More>
2001, 1(3): 15-17.
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The Basical Construction and Key Technique of the Hydraulic Tilting System of Tilting Train
YANG Guo-ping
Abstract: The basical construction, elements and key technique of the hydraulic tilting system of tilting train are introduced briefly, which are the references for developing tilting train with indepental intellectual property in China.More>
2001, 1(3): 18-21.
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Developing History of Private Railway in Japan and Its Lesson to China′s Urban Railway Construction
YANG Zhong-zhen, LU Hua-pu
Abstract: This study aims to point out the successes of private railway in Japan and offer theoretical and actual evidences for China to develop its private railway in the context of its market economy and approval of private ownership.The authors analyze the history of Japan's private railway and review its financial and management systems.It is found that urbanization induces enough market for urban railway and private railway could make success during urbabization.It is pointed out that government support and multiple businesses are necessary for private railway to develop and compete with motorization.Finally, by referring to Japan's experience, some suggestions for China to develop its private railway are presented.More>
2001, 1(3): 22-28.
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Railway Transportation Costing and Computer Costing System Design
XU Gang, LU: Cheng-wen
Abstract: The authors discuss the method of point to point railway transportation costing, put forward the idea that service time based costing can meet the good needs of the railway reform and transportation market economic system.The paper deals with also the design of the computer costing system.More>
2001, 1(3): 29-31.
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New Theory and Simulating Method of Calculating the Subsidence of Soft Ground under Highways
XIE Yong-li, LIU Bao-jian
Abstract: Through the analysis of the theory and the test results of the saturated soft soil, the authors put forward a new theory and simulating method for calculating the subsidence of soft ground, which can consider the relations of loading, subsidence and time. The theory and the mechod can be utilized to calculate the subsidence during and after the construction to control the strength of the back filed soil.More>
2001, 1(3): 32-36.
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Reliability Analysis of the Crack Spacing for Continuously Reinforted Concrete Pavement(CRCP)
CAO Dong-wei, HU Zhang-shun
Abstract: To ensure the service durability of continuously reinforced concrete pavement (CRCP), the transverse crack spacing should be controlled in an expected proper range. The reliability must be considered in CRCP reinforcement design.According to the theorem in probability theory about random vector, the direct integral formula is derived to calculate the reliability of crack spacing, and the result is compared with the one that from Monte Carlo method.The influence of the design variables and their variability coefficients on the reliability is analyzed with the two different failure models.The main factors affected the reliability are the design crack spacing and the variability level.In reinforcement design, the design spacing should be controlled to the medium value between the upper limit and the lower limit of the required spacing.More>
2001, 1(3): 37-41.
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Densification of Asphalt Mixture
YUAN Ying-jie, ZHOU Jin-chuan, HU Zhang-shun
Abstract: With the help of Superpave Gyratory Compactor, the data about the accurate change of asphalt mixture in height during the compaction in the lab, and the densification curve of test are derived. The curve can provide the inherent characteristics.The information has the same value as the densification characteristics under the traffic loads. The results indicated from the densification curves are analyzed, and whether the densification energy index can reflect the mixture's densification is questioned.More>
2001, 1(3): 42-45.
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Testing Research on the Relation between the Crack Distinctive Feature and the Structural Performance of Reinforced Concrete T-beams
SONG Yi-fan, CUI Jun, ZHAO Xiao-xing, HE Shuan-hai
Abstract: Many cracks in the existing reinforced concrete T beam bridges with low criterion are found.Based on crack distinctive feature obtained from the reinforced concrete T beam test in the laboratory, the structural steel ratio in reinforced concrete T beams with many cracks can be forecasted by the way of regressive and nonlinear analysis so that their structural performance can be effectively assessed.The method is simple in theory, convenient in application and reliable in precision. This method changes the assessment for structure from qualitative anlysis to the quantitative calculation.More>
2001, 1(3): 46-49.
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Influence Analysis of the Cylinder-by-cylinder Variations Upon the Performance of Diesel Engines
LI Jian-qiu, OUYANG Ming-gao, ZHOU Ming, LI Xi-hao
Abstract: The cylinder by cylinder variations are detected by using the momentary flywheel speed signal on a diesel engine.Combining a solenoid based electronically controlled fuel injection system the closed loop control of the variations is achieved.Then the relationship between the extent of variations and the engine performance is investigated on the engine test bench.The results indicate that the variations significantly influence the engine performance at heavy load condition.It verified the necessary of the no board detection and control of the variations on diesel engines.More>
2001, 1(3): 50-53.
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The Simulation Analysis and Test Research on the Braking Vibration Process of the Tractor-trailer Combinations
GAO Ju-cheng, LIU Ming-shu, ZHENG Lian-zhu
Abstract: The dynamic analysis for the braking process of the tractor trailer combinations running on the even road is performed.The stimulation factors during the braking vibration process are settled.The corresponding simulation analysis using the Wilson θ step by step integral method by means of MATLAB language is developed.The theoretical results are in acceptable agreement with the experimental data.More>
2001, 1(3): 54-57.
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Measuring Top Point of Foreign Diesel Engines Valve Cam Locus
ZHENG Ding-hao
Abstract: According to the trait of present domestic joint venture, this paper discusses how to use physical mathematic method to scientifically analyze the value of the valve cam locus, in order that the measuring deviation will be at the range of 0 01 mm and reach the ideal approach, when meeting with the technical problem of precise measuring valve cam locus of the advanced foreign diesel engine.More>
2001, 1(3): 58-61.
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Statiscal Analysis of Leading Passenger Cars Driving Condition in Chinese Typical Representative Freeways
XIAO Xin-hua, WU Yi-hu, SU Han-yuan
Abstract: Situation of leading passenger cars driving and survey result of traffic in five typical representative Chinese freeways(Chengdu Chongqing-Shenyang Dalian-Shanghai Hangzhou-Beihai Nanning-Wuhan Yichang) are presented.Newest understanding of passenger cars under high speed driving situation is obtained through statistics and analysis of parameters of surveied vehicle driving speed and transmission shifts, etc.More>
2001, 1(3): 62-65.
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Reseach on New Ship Measuring Platform
DAI Ran, JIA Chuan-ying
Abstract: This paper introduces a new kind of ship measuring platform.The configuration of the platform, the selecting of sensors, the integration of the system and the purpose of the platform are expatiated in detail.The examples of actual measurements proved the good credibility and capability of the platform.More>
2001, 1(3): 66-68.
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Application of Neuro-net in Maintenace Decision for Ship Diesel Engine
HU Yan-ping, YAN Li, ZHU Xin-he, YAN Zhi-jun
Abstract: In order to lessen the influence of man induced factors during marine diesel maintenance decision, and learn expert experience from history data, this paper puts forward a new decision model: Fuzzy Neural Network.With the MATLAB simulation test, it shows that this model can learn the law from the history data perfectly, and reach the conclusion accurately.More>
2001, 1(3): 69-73.
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Congestion Pricing Based on Vehicle Dynamic Navigation
YAN Ke-fei, ZHANG Guo-qiang, TAN Yu
Abstract: Through analysis of traditional theory for congestion pricing and with the consideration of the latest development in vehicle dynamic navigation, the paper puts forward a new idea about congestion pricing, and designs a rule for congestion pricing based on vehicle dynamic navigation.The rule for congestion pricing actually reflects space distribution of traffic congestion, fully considers the substitution of different routes and timely and accurately shows dynamic changes of road network traffic so that it can greatly get rid of the defects of traditional theory.At last, the paper analyzes the feasibility of congestion pricing based on vehicle dynamic navigation.More>
2001, 1(3): 74-76.
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Some Problems in Locating Urban Bus Stop and Countermeasure
PENG Guo-xiong, MO Han-kang
Abstract: Road capacities will be declined when urban bus stop location is not correct.In order to reduce interaction between bus and other vehicle, this paper gives some advises to solve the problems in locating urban bus stop, which based on route bus, road section, intersection condition, type and size of bus stop and possible using space in road.More>
2001, 1(3): 77-80.
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Toll Model and Algorithm of Road Jammed with Traffic Based on Elastic Demand
LI Zhi-chun, GU Qiang, SHI Feng
Abstract: Collecting toll for road jammed with traffic as an effective measure was adopted for managing traffic demand in many conutries and areas. The bi level programming model of the toll road was developed. The upper objective is consumer surplus which belongs to economics, while the lower is stochastic user equilibrium with elastic demand.Because of complex property, a heuristic algorithm which is based on step acceleration method and penalty function method is proposed, and a numerical example is given.More>
2001, 1(3): 81-85.
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Software Design of Urban Road Traffic Simulation System
ZOU Zhi-jun, YANG Dong-yuan
Abstract: Taking TJTS (Tongji Traffic Simulation) system as an example, this paper introduces some key software design techniques, which are employed in the development of simulation system, including system architecture design, system main flow design and interface design.More>
2001, 1(3): 86-88.
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Momentum Differentiating Equation in Real Traffic Flow
XIONG Lie-qiang, CHEN Ming-zhao, YAN Xin-ping
Abstract: This paper gives a relative viscosity hypothesis about traffic flow and a real traffic momentum differentiating equation, and tests them with the fixed flow model and the Green Shields model about speed density.More>
2001, 1(3): 89-90.
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Maximum Entropy Method and It's Application in Probability Density Function of Traffic Flow
YU Li-jun, YAN Hai, YAN Bao-jie
Abstract: Probability density function of traffic flow varies with different survey data.It is difficult to find a probability density function fitting for all kinds of traffic survey data.So to get an ordinary generating method of probability density function is greatly important for traffic researcher and engineer. The authors analyze the problem from the view of maximum entropy principle, work out six probability density function which often appear in traffic practice, and derive a formula and it's practical algorithm from physicist's achievement.The method and program are proven to be really effective in theoretical simulation and practice examination.More>
2001, 1(3): 91-94.
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The Application of Interpretation and Structure Model(ISM) in Urban Traffic Management——Cases Study of Xi′an and Hanzhong in Shaanxi Province
JIA Shou-zhen, XU Liang-neng, DONG Jun-qi, LIU Rui, LI Xiao-yan
Abstract: Taking Xi′an and Hanzhong as examples, the ISM for urban traffic was developed, and the ISM was studied with the systematic analysis method. It is pointed out that the hardware facilities, such as poor quality of roads and limited driving space, are not the main reasons to cause the traffic problems, just the software measures, such as the lack of advanced management methods, are the main factors.More>
2001, 1(3): 95-99.
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Ergonomics of Intersection Traffic Signal Installation
LIU Hao-xue
Abstract: Based on the rules of driver's signal process and with an eye to ergonomics, this paper analyzes intersection traffic sign's installation place, space position, several sign's abreast installation and successive installation, further discusses intersection advance notice sign, and provides a theory guide for effective intersection traffic sign installation.More>
2001, 1(3): 100-103.
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Human Factor in Traffic Safety in the Desert Environment
YISIMUTULA Ai-li, TUOHUTI Ai-er-ken
Abstract: Human is the main factor that effects highway traffic safety, especially under the abominable nature environment.This paper discuses the physical and mental changes of the driver and its impact on the highway traffic safety in desert environment, some measures of reducing the environmental impact on the highway traffic safety are put forward.More>
2001, 1(3): 104-107.
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Marine Simulator and Distributed Interactive Simulation Technology
JIN Yi-cheng, YIN Yong, REN Hong-xiang, ZHANG Xiu-feng, LI Zhi-hua
Abstract: This paper describes the main concept and main technology of developing marine simulator system using DIS technology, includes mathematical model of ship manoeuvring, ship dynamic display based on ECDIS, Radar/ARPA image, 3 D scene developed using OpenGVS, network technology.More>
2001, 1(3): 108-111.
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Information Display System of Engine Room for Ships
ZHANG Xian-ku, REN Guang, LIU Jun, YU Cheng
Abstract: Information display system of engine room is implemented using NetDDE, ADO and ActiveX control technique of Visual Basic.Data of engine data collecting system are dircetly transmitted to the integrated information display system using NetDDE technique because of its rapid requirement on alarming display.The data processing and display of the whole system are carried out using ADO cooperated with corresponding control.ActiveX controls are made to simulate actual instruments for displaying all kinds of information, which reduces the work load of programming.The display of information is visual, reliable and easy to use, according with the demands of actual application of ships.More>
2001, 1(3): 112-114.
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An Evaluation Model for Coal Transportation System Along Chinese Coast
XIE Xin-lian
Abstract: In order to investigate the rationality of the former investment on harbor and ship facilities of coastal coal transportation during the middle of 80's and the end of 90's in 20th century in China, a serial evaluation indexes are presented for ship port system of coastal coal transportation. The indexes include three parts of port indexes, ship indexes and system indexes.And the system indexes are especially distinct and are the principal ones.Another distinction is that large facilities are given large weight in the calculation of indexes to consider the difference between large and small facilities.The result of this evaluation can also be suitable guidance for the future planning and investment of the transportation system.A software system for the calculation of the indexes is programmed at same time to facilitate and simplify the procedure of the quantitative evaluation.More>
2001, 1(3): 115-118.
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Stochastic Model for the Allocation of Empty Container
WANG Chuan-xu, LIU Da-rong, HE Bin
Abstract: Based on the theory of chance constrained programming and stochastic storage, this paper puts forward the model for the allocation of empty container, and provides corresponding example.More>
2001, 1(3): 119-122.
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The Impact Analysis of Yangtz River Outlet Passage Construction on District Development
ZHU Yan-dong, WU Bing
Abstract: This paper discusses the impact of Yangtz River Outlet Passage construction on district development of Yangtz River Delta through the analysis of its transportation, economic and metropolis framework impact. It is considered that Yangtz River Outlet Passage Construction will do good to the transportation network of Yangtz River Delta, impulse area economy. Further more, it will affect the spacial distributing of the city group in Yangtz River Delta.More>
2001, 1(3): 123-126.
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