Journal of Transportation Systems Engineering and Information Technology

Building a New Transport System while Entering the Eleven Five Year

ZHANG Guo-wu

2006, 6(5): 2-18 .

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Transportation is one of the key pmjects during the eleventh five-year development plan of China．The theme of“2006 China Advanced Transport forum”is pushing the tenth five-year plan and establishing new public transportation network．At the meeting，from the po int of relationship between transportation and economy，transportation and science and technology ，transportation and enterprise，we summarized the great achievements that we have got during the tenth five-year plan，analyzed the problems that exist in our transpo rtation system and deeply discuss the ways and measures to solve such problems．Meanwhile，we have also made further research and discus-sion on how to push the healthy and steady transportation during the eleventh five-year development plan from different point of view．

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The Integration Quantitative and Qualitative Methodology of RITS Design and Optimization

WANG Zhuo,JIA Li-min,QIN Yong,WANG Yan-hui

2006, 6(5): 19-24 .

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The aim of RITS design an d optimization is to achieve the system whole coordination and optimization by reasonable system function setting，optimistic distribution of business flow and optimistic mapping of system resources according to the requirement，thereby to provide the theory and method for the integration railway business inform ation system．At present，there is not a relative mature，practical，systematical theory an d method related to RITS system design and optimization．Combined witII the practical requirement of railway leaping development，the integration of qu antitative an d qu alitative method ology is adopted ；the constant in-depth research on the design and optimization theory of BITS is carried out．Th e example proves that the system design an d optimization theory Can not only optimize RITS overall perform an ce but also decrease the dificulty and the cost of system development．At the 8anle time，increase the system eficiency．

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Application of Geographic Information System in Natural

MA Zhao-you,WANG Cai-xia,CHEN Gang

2006, 6(5): 25-29 .

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This paper develops the third rank natural division Geographic Information System program of highway in east seasonal frost region with MapX，and builds up a data-base on divisional information space．Taking advantage of the function of GIS analyzing，it can manage data and query inform ation efficiently．Make natural factors which affect highway engineering informational and graphic．At the same time，this system can paint various thematic maps in term of demand，and express regional diference dynamically and visually，in order to know the potential efecting caused by nature condition．Put forward sufficient and reliable decision-making for technicians and leaders.

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Metro Customer Service Hotline System Based on A11-In-One Platform

WANG Hao,SHI Tian-yun,JIANG Qiu-hua,ZHANG Xiao-shuang

2006, 6(5): 30-35 .

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Aiming at operational characteristics of Metro customer service work，customer service hotline system based on All-In-One platform which is the mainstream development trends of modem call center has been developed to achieve the network of passenger service and business management and make them computerized．It also introduces function and characteristic of All-In-One platform ，analyzes functional requirements of the system，and gives overal design solutions for the system．Passenger service hofllne system takes customized IVR flow and CRM software development as its core．And it adopts a variety of key technologies guaranteed the extensible and advanced of the system．The system is opened and operated in Nanjing subway、After successful reliability operation test，the system is simple and convenient．

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Research on Position of Trafic Sign on Urban Expressway Off-Ram

LI Ai-zeng,LI Wen-quan．WANG Wei

2006, 6(5): 36-41 .

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In order to guide traffic flow efectively，this paper firstly divided the process of identifying traffic signs and operating vehicle into seven po ints and six phases from the viewpoint of driving psychology．And by analyzing the existing setting conditions of traffic sign pointed，the basis of setting traffic sign is got．Then the process of changing lanes from the outer second one to the outer first one on urban expressway is an alyzed in detail．On the basis of it and by means of probability analysis，the theoretical model of operating distance when vehicles merging from the second lane to the first one is obtained，and then theoretical distance model of traliqc sign to the beginning po int of off-ramp is also acquired Lastly the distance oftraffic sign to the beginning po int of off-ramp belonging to diferent design ing velocity was calculated out．

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Improved Sampling Method for Pavement Roughness Evaluation

WANG Xiu-bin1,YU Lei2,ZHUO Wei-jie3,LI Xiu-gang4

2006, 6(5): 42-49 .

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The sampling method for pavement roughness evaluation has significant practical implications because the exhaustive review method in use for Nation Highway System (NHS)is too costly．Though stratified random sampling method is adopted for the arterial and collector functional systems there is a good potential to improve it．In this paper，we build a general framework for pavement roughness evaluation by improving the sampling method with fundamental assumptions about the distribution of pavement roughness，based on which we define the random variable for the overall pavement condition．After briefly introducing a simple random sampling and a stratified random sampling method，we analytically show that the latter can provide an estimate of the comprehensive roughness profile over the network with a smaller deviation．We further discuss the impact of a good stratification on an accurate estimation．Analytically we show that there exists a unique optimal stratification method applied to the transportation network．Based on the analytical result，we propose an improved stratification method．

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Design and Implement of an Online Monitoring Scheme in Communication Network

SU Li-min,YANG Yan-song,CHEN Xiao-dan

2006, 6(5): 50-55 .

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By adopting fault tree analysis．the transmitting of fault in a communication network of C3I system was analyzed detailedly，and the components’ important grades were calculated in this paper Based on the above and combined with the character of a communication network of C3I system．an on-line PR1 polling and monitoring scheme guided by Trap messages was proposed．At last，the scheme was implemented on a campus network by using C ++ languge．Experimental results show that the scheme can decrease the utilance of network resource and increase the performance of network on a certain extent．

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Equilibrium Problems of Trafic Networks with Vector Cost Functions：Model and Analysis

CHEN Guang-ya

2006, 6(5): 56-58 .

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In this paper we research a vector equilibrium problem of traffic network problems．W e introduce a new weak equilibrium principle and transfer the problem to a variational inequality problem．

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System Dynamics Model on Harmonious Development between Highway Overloading Transportation Management and Economy

HE Jie1,WEi Lin2,LI Xu-hong1,HANG Wen1,MA0 Hai-jun1

2006, 6(5): 59-64 .

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Based on the principle of system engineering and the method of system dynamics，this paper divides the big highway overloading transportation system into three subsystems，such as overloading transportation, over1oading management and economy．Total consequence charts and main positive and negative feedbacks of harmonious development between overloading management subsystem and economy subsystem are constructed. Taking Anhui province as the object，this paper sets up a model flow chart of the three subsystems by using STELLA software．It also presents related parameter instruction and does model simulation research. It accomplished policy analysis of investment proportion in overloading management in Anhui province in future 30 years and achieved the best investment proportion．

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Study on the Model and Algorithm for Multi-Depot Vehicle Scheduling Problem

LANG Mao-xiang

2006, 6(5): 65-69 .

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On the basis of intuifionlsfic description of the multi-depot vehicle scheduling problem，many mathematic models of the problem is built in this paper．The solving tactics of dividing a multi-depot vehicle scheduling problem into several single-depot vehicle scheduling problems by using the minimum distance distribution method is presented．The algorithm for the multi-depot vehicle scheduling problem is designed based on the taboo search algorithm for single-depot vehicle scheduling problem ．The computational results demonstrates that the high quality solutions to the multi-depot vehicle scheduling problem can be obtained by using the new algorithm and the algorithm is also efficient and robust．

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Optimizing Vehicle Routing Problem with Time Constrains Based on Genetic Algorithm

ZHANG Liang-zhi1,HE Min-ai1,ZHANG Zhi-hai2

2006, 6(5): 70-73 .

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Although many thoughts about vehicle routing problem bases on genetic algorithm ，there is still large space for its improvement．Faced to concrete routing problem，time and routs are both restricted and required and researches in this field are not enough．This paper，based on traditional genetic algorithm，added time restriction algorithm to guarantee the algorithm is achieved in real time．It improved the initial population in view of client distribution position，raised variation rate，reduced low eficiency calculation and improved optimistic speed greatly．It also provided strong support to multi-clients genetic computing．The eficiency of this algorithm was proved by the results of computer simulation and practical operation by logistic companies．

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The Study on Logistics Center Location Based on ANP

YU Wen-jin,LIU Kai

2006, 6(5): 74-77 .

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This paper compared the diference between the traditional transport node and logistics center and pointed out the significance and particular feature of Logistic Center Location、Under the comprehensive analysis of the literature on logistics location，it pointed out the shortcoming of the existing methods．Then it coacluded the advantage of using ANP，which is the extension from AHP．Th is paper found that it can analyze the influence factors and intemal relations of the location of logistics center more comprehensively from the combination of the outside dynamic environment and internal condition．This paper also put forward the factor structure and its analysis for logistics center location based on ANP as well as the analysis processes and key points．

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Economic Spread Model of Central City to Satellite City Based on Traffic Passages

WANG Hua-1an,ZHOU Wei,WANG Yuan-qing

2006, 6(5): 78-82 .

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This paper analyzed the similarity between economic spread and heat conduction from central city to satellite city．It introduced the conception of economic spread flux，and established the economic spread model of central city to satellite city based on traffic passages by referring to the Fourer Role．Th e model indicates that the economic spread flux of central city to satellite city is in proportion to the capacity of traffic passages and industrial gradient between them ．It is put forward that the planning of satelite city should according to economic spread flux ．The towns with greater flux of economic spread should be the satellite cities of central city and the towns with smaller flux of economic spread but with higher industrial gradient can be developed into a satellite city by developing transpo rtation．The model is proved to be reasonable and practical by the example．

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Research on Trafic Flow Models Based on Occupancy

CHEN De-wang,GUAN Ji-zhen,ZHU Xue-liang

2006, 6(5): 83-86 .

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Adopting occupancy information directly but not density information will be much helpful to practical application of trafic management．In accordance with three classical trafic flow parameter models based on density，three kinds of occupancy-speed models an d occupancy-flow models are deduced in this paper．It makes the trafic flow models more meaningful by taking the constraint conditions into account．The constraint conditions of the param eter of occupancy-based trafic flow model are given and the objective function，evaluation index and optimization methods of these models flxe discussed in detail．The optimistic results show the mode1．constraint conditions and optimization method mentioned in this paper are efective．

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A Compared Research of Several Route Choice Models Mostly Used in the SUE Problem

HUANG Liu-bing,ZHANG Ning,YANG Xiao-bao

2006, 6(5): 87-91 .

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This paper classified an d researched several route choice models．which are commonly used in SUE problem．It centered on their basic theories and compared the diferences．Through several examples，it analyzed their representations.The result indicates that each model may have diferent representation in the same network and the same model may have diferent representation in diferent networks．The research is very important to route choice used in tragic assignment problems，which indicates that the conclusion in the existing researches derived from only one model or netw ork maybe not reliable．It should be chose cautiously according to the characteristics of models and networks．

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Exponential Convergence Rate Estimation of a Class of Large-Scale Systems with Variable Delays

REN Dian-bo a,b ．ZHANG Ji-ye a

2006, 6(5): 92-94 .

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Based on the result of exponential stability of a class of large-scale systems with variable delays，this paper presents an estimating strategy on the exponential convergence rate of the class of large-scale systems．By this estimating method，the exponential convergence rate is estimated，and the estimating inequality of the exponential convergence rate of the class of large-scale systems with variable delays is obtained．The estimating strategy is based on the properties of M-matrix and the test matrix which is constructed by employing the coeficient matrices of the large-scale systems and the solutions of the Lyapunov equations interconnected with the large-scale systems． Since the method is independent of the delays and simplifies the calculation，it is easy to apply in practice．

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The Research of Method of Optimizing the Scale of Logistics Distribution Center

ZHANG Xi-zhou,YIN Shi-lei

2006, 6(5): 95-97 .

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Logistics distribution center is also called logistics hinge It’S the place where engages the activity of logistics．How to analyze the logistics distribution center’S scale in scientific way is always a difficulty as well as a focal point．Through an alyzing some factors and confirm ing some parameters，this article used the Space-time consumption theory and other principies to increase the degree in quan titative an alysis and make details of the scale of logistics distribution center．Consequently，it obtains the aim of optimizing．

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Inquire onti Perfecting Investing Management for Highway Maintenance

ZHANG Feng-yan, ZHOU Wei, WANG Yuan-qing, DUAN Guo-qin

2006, 6(5): 98-103 .

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In accordance with present problems in highway maintenance investing management，such as lack of reasonable basis in investment plans， unscientific investing management，low investment benefits，low investment market level，incomplete investing supervise system，etc．this paper discusses the basic thoughts and countermeasures of perfecting highway maintenance investing management，which should adopt the quota management，pursue maintenance cost system，do cost-benefit analysis and optimization about the allocation and arrangement of maintenance funds，perfect maintenance project cost management system，enhance cost examination and supervise system，establish a new maintenance cost forecast model based on road condition synthesize evaluation indexes and traffic volume．It would provide theory basis for pushing forward maintenance market．

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Highway Intersection Safety Diagnosis and Improvement Method

YUAN Li,LU Jian,XIANG Qiao-jun,WANG Wen-qing

2006, 6(5): 104-107 .

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Death and injuries as a result of road accidents is a recognized global problem and authorities are aware of the eonsequenees this global phenomenon might lead to．Intersections are points of highway traffic crashes．So the study of Highway intersection safety diagnosis and improvement method is very important to low death and injuries，as wel as improving the whole highway system trafic safety．It is a proactive and un-direct crashes tool to judge the possibility the crashes based on a series of survey，and implement the most appropriate counter-measure to improve traffic safety．This method is a practical，afordable，beneficial，and simple tool in aiding administrator to improve intersection safety and implement appropriate improvement．

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A Study on Improving the Protection of Aircraft Chairs

ZHAO Wen-zhi

2006, 6(5): 108-112 .

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Most aviation accidents occur in the forward movement with much danger．and how to reduce the harm to the human body becomes a conventionally concemed and a dificult problem .The orientation of the vehicle chairs is studied in this paper by comparison.The protection of the belt an d the chair is calculated according the impulsive force．An estimate formula of the chair protection is presented in this paper.The result shows that if the aircraft chair is set to backwards,the total protection to the passenger will be thirty times higher．The effect will make the survival ability higher．

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Strategy Research on the Highway Service Management in Wujiang City

GAO Lei,WANG Wei,CHENG Lin,WANG Jing-yuan

2006, 6(5): 113-117 .

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The phenomena of street market in the urbanizing process bring much trouble to highway service management agencies in Wujing City．This paper pointed out that highway authorities should carry out the planning of highway environment and management．What’s more, it studied building limit of highway management non-highway tratfic sigh and roadside structure management and highway intersection management by means of quantity management． It was suggested to establish the control index in order to provide evidence for the work of hi ghway service management.

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The Design & Realization of Distributed Information Release System for Taichang Express Shanxi

QU Shan1,CHEN Jian-wen2,LI Wei2,FU He-peng1

2006, 6(5): 118-121 .

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There are various implements to the Center Control System used on freeway．But the bulk of them can’t fulfi11 the requirement of net-control. And there was lack of efective solution to this requirement．But now,we get one which is based on experience of many projects．We introduce the concept of distributed net-control to the solution of Freeway Center Control System．And we also present the distributed system model and technical So1ution of major subsystems(Information Release System)of Center Control System．During the course of design and realization，the first principle is to protect users’investment an d reduce the cost while designing Distributed Information Release System．Only in the case of low cost adaptability of Associate Monitor System will be strong．The second principle is that Distributed Inform ation Release System is extensible．The system can adapt itself to the growing and changing requirements and make the design independent of the devices only with extensible ability．

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The Speciality of Los Angeles’S Motorization and Its Implication for China

DAI Te-qi,ZHANG Wen-chang

2006, 6(5): 122-128 .

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This paper analyzes the specialty of LA．And then it analyzes LA’s low density development and motorlzation from the a special of its natural conditions，human environment and the course of development．This paper reveals that the low density of LA is not only affected by cars as simply taken for granted, but also decided by its geological and demographic features which also contributed to car dependence．Moreover，the syntony of fast motorization and urbanlization in the history greatly promoted the low-density development．And the changes and trends of LA’S politics of urban transportation are further compared and discussed．At last．through the comparison of urbanization and motorization between China and the US we make a heuristic discuss on China’S motorization based on the LA’S experiences．

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Research of Information Exchange Platform for Beijing Urban Rail Transit

ZHANG Zhen-jianga,LIU Yunb

2006, 6(5): 127-132 .

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As the situation of each information application system is used independently and some information islands exist in Beijing Urban subways，this paper presents a system frame of integrated information system infrastructure of Beijing subway．Based on the multilayer system frame it is presented that the corresponded method of information exchange is achieved for the present and future information system．At the same time the realization is given． The application of system shows that the system is advanced and practical for Beijing urban subway transportation management．

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