交通运输工程学报

Environment protection in application of asphalt mixture

LI Zhu-long, DING Xiao-jun, ZHAO Shu-ceng, WU De-ping

Abstract: In order to control the emission volume of CO₂ in the production of asphalt mixture for pavement, this paper introduced the application of medium-sized temperature technology in asphalt mixture, and the application and research of normal temperature asphalt mixture in Japan and Finland, analyzed the technique of cold-temperature asphalt mixture and cold-recycled asphalt mixture used in China, studied the environment protection in the construction of asphalt mixture pavement. It was pointed that using the medium-sized temperature technology can decrease the mixing temperature of asphalt mixture, its compaction degree is not decreased, so the emission of CO₂ can be reduced.More>

2004, 4(4): 1-4.

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Damage causes of mastic asphalt pavement on orthotropic steel deck plate

CHEN Xian-hua, HUANG Wei, WANG Jian-wei, CHENG Gang

Abstract: This paper investigated the damage conditions of mastic asphalt pavement on orthotropic steel deck plate, analyzed the damage causes, including the properties of pavement materials, mechanical conditions with different truck load, traffic content, and so on. Analysis results indicate that failure of high-temperature stability and fatigue property, overload and slow velocity of trucks, heavy and dense traffic are the main causes for the damage.More>

2004, 4(4): 5-9.

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Subgrade resilience modulus measuring by portable falling weight deflectometer(PFWD)

DUAN Dan-jun, CHA Xu-dong, ZHANG Qi-sen

Abstract: This paper studied the relationships of dynamic elastic modulus with compaction, and moisture content with PFWD. It was pointed that the obtained satisfactory correlations of dynamic elastic modulus with static elastic modulus, compaction with moisture content are over 0.85, the maximum value of dynamic elastic modulus is near by the optimum moisture content, which is agreetment with the real situation. The result shows it is feasible to measure and evaluate subgrade resilience modulus with PFWD.More>

2004, 4(4): 10-12.

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Spreading machine disposing and paving methods of airport pavement asphalt

SHI Bao-hua, CAI Liang-cai, HUANG Bi-bin, SUN Tao

Abstract: Based on the features of spreading machine and incorporating engineering experience, it was pointed out that the spreading machines should be chosen and disposed according to the length and thickness of asphalt covering, the horizontal grade of runway and the productive capacity of asphalt mix machine. This paper proposed the method of paving asphalt along the vertical section of runway without interrupting flights. The results show that the method can insure the engineering quality of airport pavement, satisfy the safe demands of asphalt covering without interrupting flights.More>

2004, 4(4): 13-16.

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Frequency number error and support condition of flexible cable tension

CHEN Chang-song, CHEN Zheng-qing, YAN Dong-huang

Abstract: In order to study the test errors of cable tension due to natural frequency order and support condition, based on dynamical equilibrium of infinitesimal element, the formulas of natural frequency and cable tension were deduced under flexural rigidity. In terms of Ray-Leiy energy method, the influence of additional mass and elastic constrain on natural frequency was studied. The influence rule of test error due to test frequency order has the character of two times parabola. The natural frequency can decrease when added additional mass, and the influence of sensors mass may be neglected during test. The cable tension error due to elastic support has linear relation with the axial rigidity of support link, which is also related to natural frequency order. All this are instructive to cable tension measurement such as cable-stayed bridge, suspension bridge and other cable-stayed structures.More>

2004, 4(4): 17-20.

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Nonlinear track irregularity forecast model

ZHOU Yu, XU Yu-de, LI Hao-ran

Abstract: Based on nonlinear forecast theory of track irregularity, a forecast model was developed by multiple factor regression analysis with traffic data and inspection data of track inspection car. Future track irregularity development was forecasted using this model. The values of forecast and inspection were compared, and the error between them was analyzed. It was pointed that the figures of forecast and inspection are similar. The result indicates that it is feasible using the model to forecast longitudinal irregularity.More>

2004, 4(4): 21-24.

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Extrapolation of probabilistic fatigue S-N curves on 16MnR steel weld joint

YANG Bing, ZHAO Yong-xiang, WU Ping-bo, CENG Jing

Abstract: This paper extended the commonly probabilistic curves of 16MnR steel weld joint into long life regime by 2m-1 exponent method according to the fatigue test data in different test conditions. The curves are constructed by Basquin relations, consisting of survival probability-based curves, confidence-based curves, and survival probability and confidence-based curves. These curves fit the test data well in original regime, can predict the long life regime approximately. The extrapolated effects, which fit into the test data of 16MnR steel weld joint, reveal that the method acts approximately as the function of extrapolation, and it is more reasonable than direct method, which extends original S-N curves into long life regime directly. The results show that the method is feasible.More>

2004, 4(4): 25-29.

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Flexible multibody system dynamics predicting method of high-speed vehicle handling

XIA Zhang-gao

Abstract: In order to evaluate the handling of high-speed vehicle, taking the vehicle with a standard structure as its object of study, and using flexible multibody system dynamics method, this paper founded the subsystem models of steering, suspension, tire, body and the dynamics analysis model of automotive handling and stability based on ADAMS software platform. As to the flexible part in the models, the finite element analysis software, ANSYS, was used to process model analysis, and the ADAMS/Flex module was employed to amalgamate the module deformation into the kinematic and dynamics simulation. The major assessment target of steering wheel torque input was obtained by the simulation of steering wheel center location. The error of simulating data compared with the testing data is less then 10%. So in the vehicle design phase, the flexible multibody model can be used to predict the handling of high-speed vehicle, and substitute the sample test.More>

2004, 4(4): 30-33.

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On-line monitoring and fault diagnosis system for electric system of 08-32 tamper

YING Li-jun, ZHOU Shu-wu, QI Lin, WANG Jing-yuan

Abstract: The railway would not run on schedule if 08-32 tamper takes place electric troubles while it maintains railway in blockading time. For solving the problem, the system of on-line monitoring and fault diagnosis was developed using computer technology and fault diagnosis theory. The function module of on-line monitoring can monitor some key parameters at real time, the function module of fault diagnosis can detect the locations and reasons of faults quickly and accurately according to the fault phenomena. Application results show that the system is feasible in engineering application.More>

2004, 4(4): 34-36.

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Automobile rear end collision model on freeway

HOU Zhi-xiang, WU Yi-hu, LIU Zhen-wen, LI He-qing

Abstract: A probability model of automobile rear end collision based on ANFIS(adaptive neural-fuzzy inference systems) was provided, the speed difference of automobiles, the speed of tracing automobile and the distance of automobiles were taken as inputs, and the probability of automobile rear end collision was taken as output. The probability of automobile rear end collision was calculated in different speed difference and distance of automobiles using the model. The probability model provides a new plan for analysing automobile rear end collision, and has directive role for decreasing automobile rear end collision on freeway.More>

2004, 4(4): 37-39.

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Determining method of airfield clearance zone

CAI Liang-cai, SHAO Bin, ZHENG Ru-hai, ZHONG Xiao-lei

Abstract: In order to solve the contradiction of construction development with airfield clearance protection, this paper analyzed the influence of weather condition, navigation equipment, takeoff and landing path on the airfield clearance zone. According to the flight airline theory and those influencing factors, the component and the range of airfield clearance zone should be revised. When the diffusivity of terminal clearance zone is 15%, the breadth of terminal clearance zone should be extended from 2 km to 3 km, the clearance zone would be decreased to 50% and 60%. The air safety could be ensured, the construction development space could be expanded.More>

2004, 4(4): 40-43.

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Management decision support system of multiple capacity air traffic flow

ZHANG Ying, HU Ming-hua, PENG Ying

Abstract: This paper analyzed the ground holding method and terminal sequencing method, put forward the core strategy of the system. It was pointed that the delay time is greatly decreased, the traffic flow becomes more fluent after executing the strategy, and the rationality of scheduled flight timetable has great influence on the effect of the strategy. It is better to execute the strategy on the basis of optimized scheduled flight timetable.More>

2004, 4(4): 44-48.

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Forecasting method of parking-demand based on capacity-of-network

BAI Yu, XUE Kun, YANG Xiao-guang

Abstract: Based on parking-demand trip O-D prediction method, this paper studied the relationship between capacity-of-network and parking-demand, took capacity-of-network and network service level as restrictions to modify parking-demand trip O-D prediction method, and established the method to forecast parking-demand on the basis of capacity-of-network. The forecast result of the method has an agreetment with the real parking-demand of capacity-of-network.More>

2004, 4(4): 49-52.

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Self-judgment and predigested decision-making method of urban parking facilities planning

ZHOU Zhi-yong, CHEN Jun, WANG Wei

Abstract: Using similar coefficient method in fuzzy clustering analysis, six evaluation indices were confined to appraise urban parking facilities planning, how to calculate the indices was given, fuzzy relative evaluation means was applied to express the indices, which are difficult to fix quantify directly. According to measurement units from 1 to 9, analytical hierarchy process method was adopted to count the weight values of six indices. The original data of the evaluation indices were disposed in term of standardization. Thus self-judgment and predigested decision-making model was set up by integrative adding weight. Applied results show that this method can reflect real demand.More>

2004, 4(4): 53-57.

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Supply-demand coordination development of urban road traffic system

WEI Lian-yu, MA Yong-feng

Abstract: Based on the supply-demand theory, this paper constructed the evaluation indices of supply-demand system of urban road traffic, proposed a concept of coordination development level of supply-demand system and a quantitative evaluation method of determining the coordination development level. An example show that this method can reflect the real circumstance, which shows the method is feasible.More>

2004, 4(4): 58-61.

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Planning indices system of urban road network

LU Jian, WANG Wei

Abstract: Based on the analysis of urban road network's quantity and quality, this paper discussed the urban road network planning indices system, put forward that urban road network planning indices system should be divided into two parts, space indices system and traffic quality indices system. Seven space indices and three traffic quality indices were presented, and the definition and quantizing method of each index were put forward. Applied results indicate that the data to quantize the indices can be gained very easy during urban road network planning process, and can be defined under the different characteristics of different cities.More>

2004, 4(4): 62-67.

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Short-term traffic flow prediction methods comparison of road networks

SHI Qi-xin, ZHENG Wei-zhong

Abstract: A large number of techniques have been applied into short-term traffic flow prediction, which can be classified into two groups: statistical models and artificial neural network model. The models and their application were discussed and compared. Several models, including historical average, ARIMA (auto regressive integrated moving average) model, nonparametric regression, RBF (radial basis function) neural network and Bayesian combined neural network model were applied into a numerical example of short-term traffic volume prediction in a field network, their prediction results and performances were compared. It was found that the error of hybrid neural network model is littlest, its prediction reliability is highest, it is the most effective method to predicte short-term traffic flow.More>

2004, 4(4): 68-71.

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Sampling methods of resident trip investigation

SHI Fei, LU Jian, WANG Wei, GE Hong-wei

Abstract: Applying mathematical statistics, this paper studied the characters of random sampling and its excessive random effect on other trip characters, put forward stratified sampling method, researched quota sampling and best distribution sampling. It is recommended that random sampling should be adopted in large cities, and stratified sampling should be adopted in small-medium cities to raise investigation precision.More>

2004, 4(4): 72-75.

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Evaluation and decision making method of preference matter element based on TOPSIS

MA Rong-guo, YANG Shen-lin, LI Tie-qiang

Abstract: In order to raise the accurateness of evaluation and decision making, discrease evaluation information loss, this paper put forward a matter element method to compute the related degrees of every scheme matter element with ideal matter element and negative ideal matter element. According to the related degrees, the preference matter, which is the optimization matter element, could be calculated, so the most optimization plan could be determined.More>

2004, 4(4): 76-78.

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Organization design process of virtual logistics

WANG Yi-sheng, WANG Feng, JIANG Da-li

Abstract: According to the key factors that should be considered in the organization design process of virtual logistics, this paper developed the organization design process of virtual logistics by IDEF0, gave some tools and methods in relevant processing phase, explained goal establishment, preliminary design, establishment of organization structure, running mode, running feedback and disorganization of the design process, described the process of each phase by using process flow chart method. Some key problems that should be solved in the design process were described.More>

2004, 4(4): 79-83.

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Genetic algorithm for optimal arrangement of general piece goods

BU Lei, YIN Chuan-zhong, PU Yun

Abstract: In order to make good use of container's loading weight of volume in railway transportation, this paper constructed reasonable coding and fitness function by improved genetic algorithm, according to loading weight, volume and priority. It was found that 42 pieces of goods are loaded into a 10 t container, the container usage ratio of loading weight is 83.8%. Applied result shows that the algorithm is feasible.More>

2004, 4(4): 84-87.

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Evaluation of international dry bulk shipping market

ZHENG Shi-yuan, YAO Zu-hong

Abstract: This paper studied the evaluation of international dry bulk shipping market by factor analysis, its index system was developed. Through the comparison to baltic freight index, it was pointed that the evaluation result can reflect the main trend of international dry bulk shipping market. The result indicates that factor analysis is an effective measurement for evaluating international dry bulk shipping market.More>

2004, 4(4): 88-92.

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Developing strategies from highway freight station to modern logistic industry

CHENG Ri-sheng

Abstract: The Chinese highway transport industry was divided into three parts: transport corporations, freight stations and freight information markets. The highway freight stations should be transfered to consolidation center, sorting center, transferring center and processing center. The invest strategy of highway freight stations was presented based on economics theory.More>

2004, 4(4): 93-96.

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Planning evaluation of multipurpose transit smart card system

ZHANG Ning, TAO Zhi-xiang, GUO Xiu-cheng

Abstract: Based on the system planning and evaluation factors of multipurpose transit smart card system, the evaluating model of the system was proposed by AHP. With the practice in Nanjing city, the optimized application arrangement was calculated using the AHP model. The results show that the evaluating model is reasonable.More>

2004, 4(4): 97-101.

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Bus travel transit path based on ant algorithm

LI Wen-yong, WANG Wei, CHEN Xue-wu

Abstract: Considering the character of bus passenger travel, a bus travel transit path query algorithm with the least transfer times was brought out, which was based on ant algorithm and Dijkstra algorithm of bus stops query. Using the path selection character of ant looking for food and the principle of refreshing bus-line's hormone intensity, the algorithm achieved the optimization goals of bus travel path selection, which were the least transfer times and bus stops. Application results show that this method can reflect the real situation.More>

2004, 4(4): 102-105.

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Coordination control of crossing pedestrian signal and crossroads signal

ZHENG Zhang-jiang, WANG Wei, CHEN Shu-yan

Abstract: Based on field investigation, the paper analyzed the pedestrian and vehicle traffic in the representative section of ideal artery with timing linear control system theory to optimize the crosswalk and intersection signal timing. After adopting the coordination control design, the mainstream vehicle flow disturbance caused by pedestrian crossing is effectively reduced, and the mainstream green wave width can meet the requirement of pedestrian crossing.More>

2004, 4(4): 106-109.

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Geographical information system based on ArcView platform

LI Li, ZHOU Mei-yu

Abstract: This paper applied ArcView software and GIS technology to set up rail 3D visual model, developed visual user interface. Applied results show that the system can realize the picture and text reveal of geographical information system and 3D simulation geographical objects to satisfy consumer information demand. In this system, information query is very convenient, which indicate that the system is feasible.More>

2004, 4(4): 110-113.

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Heading measure system of differential digital magnetic compass and gyro

LIU Yan, YANG Xin-yong, HUANG Sheng-guo

Abstract: This paper defined DDMC (differential digital magnetic compass), built up this system based on C8051F005, introduced its software and hardware design, discussed its communication circuit. The identification precision of the system is 8°~10°, while identification rate is above 50%, error is below 15%. The test results indicate that DDMC can raise the identification rate for dynamic compass error, and settle magnetic compass reliability in the assembled system.More>

2004, 4(4): 114-116.

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Precise apparent position calculation of star in navigation

WANG An-guo, JIA Chuan-ying, SUN Peng

Abstract: Based on FK5 and DE405 ephemeris, the paper analyzed the influence of relativity, precession, nutation and aberration on apparent position calculation of star. Astronomy vector treatment was employed. The automatic calculation of star apparent position was realized by program language VC(++). The calculation result of the model is more accurate than the calculation results of nautical almanac and other calculating program.More>

2004, 4(4): 117-120.

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2004 Vol. 4, No. 4

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