bluuebunny/crossref_metadata_2025 huggingface dataset:
Pavement Performance Evaluation and Analysis on Different Cooling Ways of Asphalt Mixture
Authors: Yang Yan Hai , Gao Xiao Xi , Liu Zhuo , Shen Yang , Gao Jing Xiong
Published: August 2013

By adding Sasobit, DAT and BLT additives to reach the purpose of hot mix asphalt mixture construction temperature decreasing, achieve energy conservation and environmental protection. With an AC-13 SBS modified hot mix asphalt as reference, the high and low temperature performance and water stability of three energy-saving and environment-protecting road materials are evaluated through laboratory tests. The results show that compared with HMA, all the three kinds of energy-saving and environment-protecting road materials exhibited a significant increase by 8%-15% in high temperature stability. While the low temperature cracking resistance and anti-water damage performance of Sasobit mixture were decreased somewhat, little changes in these two aspects of the performance of the other two materials. Finally, analyses the economic benefits, and provide the basis for the choice of asphalt mixture cooling additives.
Vertical Dynamics Analysis on Evaluation Standard of Ballastless Track Damping Effect
Authors: Wu Zeng , Li Jie Qing , Tao Zhong
Published: August 2013

Vibration and noise reduction was the trend of ballastless track, however, evaluation of different types of damping effect of the track was not easy to achieve. The orbit of the traditional vertical displacement of the components, to evaluate the damping effect of the acceleration was not accurate when the difference between the track structure larger. From the principle of energy conservation, the flexibility to select a long pillow, long pillow vertical, orbital plate of three ballastless track fragments, respectively, without the establishment of a vehicle - track couplin model, the vertical acceleration, the vertical track of the various components of displacement, acceleration, maximum kinetic energy was calculated out when train speed was 250km/h by numerical simulation methods. By analyzing the relationship between their body vertical acceleration and found that the largest track the existence of kinetic energy correlation between the changes in, made with the greatest kinetic energy damping effect as the track of one of the evaluation criteria, and it was easy to implement.
New Mode of Sustainable Development in Urban China, the Compact City
Authors: Gu Lin , Chen Meng Fei
Published: August 2013

Compact city is the concept of sustainable development, which aimed at the city spread disorderly development is put forward. The form of compact city depends on the density of population and buildings in a city, emphasize the mixed use and intensive development of land. It is a kind of new thinking based on efficient use of land resources and the development of city. After compact city as a new urban development mode is put forward, to discuss whether it is conductive to China's urban sustainable construction has been continuously. This paper, at first, expounded the development of the concept of compact city and its basic connotation, then analyzed the present situation and significance about the compact city in China. Finally, China drawing on the experience of compact city needs to foster strengths and circumvent weaknesses, and puts forward some opinions on the compact city in China at the present stage of city sustainable development.
Study on Mechanical Responses of Typical Asphalt Pavement Structure
Authors: Li Xiao , Chen Shan Qin , Li Qi Wei
Published: August 2013

Semi rigid asphalt pavement, flexible base asphalt and composite base asphalt pavement are the main structure forms of asphalt pavement. The mechanical distributions are different in those structures. Based on elastic layer system, this paper took the Shell designing software BISAR3.0 as calculation tool to get the tensile strain of three kinds of models, the distribution of main mechanical response were compared with each other using the ORIGIN8.0. Then a comprehensive analysis was made based on the mechanical response distributions of the three structures. The results show that: flexible tensile strain and vertical strain in the bottom of asphalt layers of semi rigid base structure is the smallest, as it shows better performance. It proves that the design specification adopting now is not suitable for semi rigid base pavement
Analysis on the Fatigue Life of Asphalt Pavement under Traffic Flow Loads
Authors: Gao Meng Qi , Wang Ping Ying , Ding He Ping
Published: August 2013

To study the fatigue life of asphalt pavement under traffic loads, a 3-D finite element analysis (FEA) Visio-elastic road model was established on the layered theory with ANSYS software. The fatigue damage was calculated with the maximum horizontal tensile strain of asphalt layer bottom based on the fatigue fracture mechanics, when single axis went across. Then the fatigue life was obtained after the fatigue damage occurred in some degree by the Miners linear cumulative damage rule. The results show that it taken 3.4 years when the damage area reached 10% of wheel path area, and 4.5years when reached 45%; while the calculated result was 5.5 years by axial-load conversion method. The analysis shows that the fatigue life of asphalt pavement calculated by fatigue fracture mechanics rule has more significance in practice.
Relation between Highway Vehicle Speed and Influence Factors
Authors: Liu Zhong Gen , Cao Guo Bin , Guo Feng Li
Published: August 2013

through analyzing the speed of the vehicles running on the highway, including the running speed and possible speed of the vehicle, the factors affecting the vehicle speed are studied, some advices of the vehicles safe running are given.
Different CA Compaction Property of the Asphalt Mixture on the Bailey Method
Authors: Zhang Yu , Sun Bo Wei
Published: August 2013

This paper evalates the compaction property of the asphalt mixture through the densification curve of the Superpave Gyratory Compactor, introduces four factors such as CEI、TDI、k1、k2 to reflect the compaction property of the asphalt mixture under construction and traffic load, and analyses the compaction extent of the asphalt mixture with different CA.Based on the performance demand and the construction techniques,this paper gives reasonable range of the Bailey parameters CA.
Analysis of Mechanical Response for Subgrade of Tramcar with Monolithic Track-Bed
Authors: Huang Chong Wei , Wang Shuo , Shao Xian Zhi , Du Xian Zhao , Su Er Hao
Published: August 2013

Based on the differences between the subgrade of tramcar with monolithic track-bed and the existing subgrade of railway, anew three-dimensional nonlinear finite element model is established in this paper. And then,the numerical analyses are conducted by considering weight load of track structure. The characteristics of mechanical response in the subgrade of tramcar with monolithic track-bed are found by finite analysis, which offers a reference for the future engineering, in terms of the design concept, design basis and theoretical support as well as the basis for decision making.
Experimental Research on Cement Treated Permeable Base of Expressway
Authors: Hu Ying De , Xiong Mao Dong
Published: August 2013

orthogonal test design approach is adopted to analyze and research several key factors like gravel drainage foundation layer strength, permeation coefficient, effective porosity to conclude the basic principle for indoor mixing ratio. On the basis of the indoor experimental achievements, the CTPB foundation layer of experimental road is designed and the test results show that the indexes reach the forecast effects.
The Soil Base Bearing Capacity Relevance Research in the Highway Overhaul Decision-Making
Authors: Sun Jie , Sun Qiang , Wang Ming Hua
Published: August 2013

Based on theexamples works of the road site excavation pits channels and supplemented by road non-destructive testing methods, this paper mainly adopts the road performance of the structural layers , main site designated point FWD test, soil base DCP test and soil base structure bearing capacity correlation. The results show that the existing common road on FWD detection inverse soil base modulus has a good linear relationship with soil base DCP measured modulus, in addition, measured soil base modulus with moisture content of the soil base also have a good linear relationship, but the three correlation does not comply with the actual situation of the road. Thus, before the decision making of the highway overhaul conservation , old Road usage evaluation, the road of non-destructive testing, the excavation pits survey and structural layers indicators detection are very necessary and effective methods.
Research of Fatigue Behavior of Asphalt Pavement Materials with WMA and RAP
Authors: Yu Bao Yang , Wang Yu , Zhao Zhong Hua
Published: August 2013

With the development of chinas road construction, the increase of traffic and the traffic load the fatigue of asphalt pavement under the vehicle load has become one of the major disruption in the form of life of life of asphalt concrete directly affect the service life and the performance use of asphalt pavement ,it is a key factor to determine the life cycle cost of asphalt concrete pavement construction. The objectives of this paper are to characterize the fatigue behavior of porous asphalt pavement mixtures containing RAP and a WMA additive using Super pave gyratory compactor and dynamic modulus testing. Four types of asphalt mixtures were evaluated in this study. This study evaluated compaction energy index, permeability, indirect tensile strength, and dynamic modulus for all types of porous asphalt mixtures. All of the asphalt mixtures meet the typical minimum coefficient of permeability in this study.
The Influence of Pavement Construction on Embankment Settlement in Highway Extension Project
Authors: Wei Xian Lin , Wang Yi Min , Zeng Ze Min , Zhang Luo
Published: August 2013

In order to reduce the soft soil layer deformation due to pavement construction, equal preloading of pavement is usually adopted after embankment filling in soft ground region. But as the ground treatment effect of pile-supported and geosynthetic reinforced embankment is satisfactory with great load-carrying ability, the necessity of applying equal preload is worth discussing. Combined with the practice of Guangzhou-Sanshui expressway widening project, the settlements in surveying sections during the paving construction period in extension area were monitored. The monitoring data shows that pavement load had small influence on embankment settlement: the uneven settlement between newly widen and existing road is small and the post-construction settlements are controlled within the standard requirement. On the premise of guaranteeing the construction quality of composite-foundation and filling compaction degree, it is unnecessary to take equal preloading to avoid excessive embankment settlement caused by the pavement structure.
Design Method of Asphalt Treated Base Asphalt Content Based on Cohesive Strength
Authors: Zhang Yi , Huang Chong Wei , Liu Wei Jie , Xu Yi Feng
Published: August 2013

Combining with compression strength and tensile strength, the cohesive strength method is applied to determine the asphalt content (by weight of aggregate) of asphalt treated base (ATB) for the purpose meeting ATB tensile performance. The results are compared with those of Marshall Method. Two calculation methods of asphalt film thickness are applied to calculate the thickness of asphalt film. The calculation results show that cohesive strength method force the admixture to attain the better thickness of asphalt film, and the spectrum of film thickness is between about 6.5μm ~9.0μm.
The Application of High Modulus Mixture of EME2 on Qin Lin Expressway Test Road
Authors: Wang Xiao Yan , Zhao Hai Sheng , Wang Lin
Published: August 2013

This paper used the design method of EME high modulus HMA from France to carry out the mix design of EME2(0/14) HMA, and carried out Duriez test, HWTD, dynamic modulus test and low temperature bending test. The test result showed that this kind of HMA had excellent water resistance, high temperature rutting resistance, high dynamic modulus and low temperature cracking resistance. This EME high modulus HMA was applied in the test road on Qing Lin expressway.
Study on Influences of Warm-Mix Agent on SBS Modified Asphalt Mixture
Authors: Song Xiao Yan , Li Yuan Yuan , Ji Qiang Hua
Published: August 2013

Through conventional and unconventional tests, the influences of self-developed warm-mix agent on the performances of SBS modified asphalt are studied. The results show that the warm-mix agent has great influences on the ductility and aging quality changes of SBS modified asphalt; and the warm-mix agent can improve the asphalt rutting factor G*/sinδ and fatigue factor G* • sinδ. The mixing ratio of the warm-mix SBS modified asphalt mixture is designed based on GTM method and the pavement performance is compared and verified. The results show that: in terms of high temperature performance, the warm-mix asphalt mixture is superior to the corresponding hot-mix asphalt mixture; and in terms of low temperature performance and water stability, the former is equivalent to the latter.
Research on Stress Distribution of CFG Pile-Net Composite Foundation in High-Speed Railway
Authors: Cheng Jun , Zhang Ji Wen
Published: August 2013

Combined with the field tests of CFG (Cement Fly-ash Gravel) pile-net (geogrid) composite foundation in Danyang Test Section of the Beijing-Shanghai High-speed Railway, the settlement, pile-soil stress ratio and additional stress of composite foundation were analyzed by numerical simulation. It shows that the pile-soil stress ratio of CFG pile-net composite foundation is in the range of 4 to 6. And the reasonable distribution of additional stress in composite foundation is also discussed. The results can provide references for the design of the CFG pile-net composite foundation under embankment in high-speed railway.
The Combination of Virtual and Reality on Road Design
Authors: Zhang Hang , Cheng Shao Long , Li Chao
Published: August 2013

With the rapid development of electronic information technology, computer technology, and space technology, the highway surveying technology and virtual scene in the design of the road become more and more important. The traditional road survey and design is mainly the flat-type design. The design made in this way is the two-dimensional one. Only by making the design to a road can we see the overall effect of the road design. The theoretical basis of the research will be found from the original road survey and the static graphic design will be made into a dynamic visual design by the use of model software. Through the concept of conversion, we can make the static design of the road into the dynamic design. By modeling the design and dynamically analyzing, we can analyze, improve and modify it when imitating the dynamic design. This is a modification of the virtual kind and can timely, accurately analyze the quality of the outcome of the study design. Therefore, the combination of virtuality and reality of the road design will become the mainstream trend.
High Temperature Stability of Asphalt Mixture Research
Authors: Li Hong Bao , An Yan Qing
Published: August 2013

Rutting is one of the most hazardous damage form of asphalt pavement.But,owing to itself inherent in the viscoelastic characteristics of asphalt mixture,the diversity of factors influencing the high temperature of asphalt pavement anti-rutting performance and The complexity of rut formation,this three reasons make ruts become a worldwide problem.Starting from the mixture, This article analyzed the influence factors of the rutting resistance of asphalt mixture at high temperature.For asphalt mixture, through the experimental data, the research status at home and abroad, from the type of asphalt, asphalt content, grading of aggregates and air voids four aspects analysis and study the influence factors of the stability of asphalt mixture at high temperature.
Planning Thinking of the Transformation from a Resource-Based City to Ecological Civilization City: A Case Study of Pucheng Eco-City Planning
Authors: Hou Quan Hua , Duan Ya Qiong
Published: August 2013

The issue of climate change triggered a reflection on the traditional industry patterns of resource-based cities and thinking of traditional planning, the concept of ecological civilization city arises at the historic moment. This paper discusses the inevitability of the transformation from resource-based city to ecological civilization cities on the base of using modern one planning means which includes urban spatial organization, urban industrial restructuring and urban construction implementation these three strategies, then thoughts on Pucheng Eco-city planning and construction are proposed and be hoped to provide reference to other similar urban planning practice.
Experimente Research of Filler-Bitumen Ratio Impact on Asphalt Mixture Performance
Authors: Cao Lin
Published: August 2013

AH-130 base asphalt graded according to the upper limit of AC-16 close gradation is selected in this paper to identify the impact of asphalt mortar of different filler-bitumen ratios on asphalt mixture’s road performance through small beam bending test at low temperature. And then bending failure energy, in substitute of bending strength, bending strain, is used to evaluate the anti-cracking performance of asphalt mixture at low temperature.
Performances Comparison of Mine Filler Asphalt Mortar and Diatomite Asphalt Mortar
Authors: Cheng Yong Chun , Ma Hui Li , Huang Jian Ping , Zhang Peng , Tao Jing Lin
Published: August 2013

In order to study the different influences of mine filler and diatomite on asphalt mortar performance, asphalt mortars with 7% mix amount of mine filler and diatomite were tested for apparent viscosity at 135°C, penetration value at 25°C, and softening point. PI and PVN were used to evaluate the temperature sensitivity of the two kinds of asphalt mortars as well. Further, asphalt mortar bending test at low temperature were done to verify the good mechanical performance of diatomite asphalt mortar. Results indicate that, compared to mine filler, diatomite has stronger modified effect on asphalt, including apparent viscosity, penetration and softening point. And diatomite is more conducive to weakening temperature sensitivity of asphalt mortar. In addition, bending test indicates that diatomite asphalt mortar is more conducive to upgrade low temperature performance. Thus, it is significant for the preparation of diatomite modified asphalt concrete on the design of grade mixing ratio, so as to be conducive to promoting the use of diatomite modified asphalt concrete.
Study on the 3G Network-Based Interactive Monitoring System for Highway Engineering
Authors: Cheng Yu , Han Jian Jun
Published: August 2013

In this paper, an interactive monitoring system for real-time, dynamic and multi-dimension monitoring of highway engineering by utilizing the current 3G network has been proposed innovatively after analyzing the characteristics of highway engineering construction. It has been applied into a transformation project of a certain national road and achieved fine results. It can provide a convenient and low-cost plan for the informationization and intelligent construction of highway engineering.
Mechanical Response of Asphalt Pavement under Overloading
Authors: Liu Sheng Jie , You Qing Long
Published: August 2013

This paper examines theoretically the possible mechanical response changes on both bituminous pavement structure using linear elastic method, the change regulation of deflection,stress on the bottom of base and subbase and compress strain on the top of subgrades between semi-rigid base and flexible pavement pavement. In the load application procedure, a dual wheel with the a series of pressure was chosen.The results have shown that the deflection tensile stress and subgrade compressive strain on the surface increase with the increase of axle load and they would result in serious effect of overloading on the earlier damage of asphalt pavement.
The Training System Based the Virtual Traffic Scene on Pedestrians' Safety
Authors: Sheng Yan , He Xiong Jun , Nie Xiao Hu , Xiao Wen Tao , Ran Rui Jiang , Huang Qiao Lian
Published: August 2013

With the rapid development of Chinas urbanization, pedestrians traffic accidents have been on the top due to the negligence of traffic rules or lacking of safety awareness. This research develops a system on improving pedestrians safety awareness, especially to children, in city traffic. It adapts virtual reality technology to the training of pedestrian safety consciousness via the virtual scene of city. Clients may get involved in the virtual traffic environment, take charge of pedestrians in the scene, and conduct a timely monitor of pedestrians and give them warning when necessary so as to publicize traffic rules and improve pedestrians safety awareness.
Urban Rail Transit Network Evaluation Based on TOPSIS
Authors: Niyaz Turnisa , Ruzi Osman , Chen Faan
Published: August 2013

In order to improve the objectivity of urban rail transit network evaluation and achieve the sub-file of quality level of preliminary planning, a comprehensive evaluation method for urban rail transit network was proposed based on TOPSIS, then the evaluation model of urban rail transit network was constructed. This method was applied to Xian urban rail transit network planning. The result shows that case-4 is best one among the four urban rail transit network planning of Xian and consistent with the passenger flow prediction. The evaluation model for urban rail transit network based on TOPSIS is objective, which involves few parameters, simple operation, science evaluation and provides a basis of decision for urban rail transit network planning.
The Research of Freeway Single Horn-B-Type Interchange Situ Reconstruction and Expansion Traffic Organization
Authors: Hu Kong , Zhu Shun Ying , Wang Hong
Published: August 2013

Interchange is the important conversion node of freeway. In the process of Interchange reconstruction and expansion, how to ensure the traffic of Interchange in all directions operate normally, to reduce the impact of the construction on traffic flow and to ensure the security of the roads traffic flow smoothly is very crucially. Through analyzing the characteristics of the driver, road and traffic flow, to study and determine the Interchange situ reconstruction and expansion traffic organization plan and security measures during construction traffic organization.
A Two-Phase Meta Heuristic Approach to the Location-Routing Problem for Transportation Network Planning
Authors: Sun Ji Ung
Published: August 2013

In this paper we consider the location-routing problem which combines the facility location and the vehicle routing decisions. In this type of problem, we have to determine the location of facilities within a set of possible locations and routes of the vehicles to meet the demands of number of customers. Since the location-routing problem is NP-hard, it is difficult to obtain optimal solution within a reasonable computational time. Therefore, a two-phase ant colony optimization algorithm is developed which solves facility location problem and vehicle routing problem hierarchically. Its performance is examined through a comparative study. The experimental results show that the proposed ant colony optimization algorithm can be a viable solution method for the general transportation network planning.
Gender Differences in Travel Mode Choice Behavior in Zhenfeng City
Authors: Liu Xia , Lu Jian
Published: August 2013

Gender difference is an important factor in travel mode choice behavior. In this paper, some characteristics of different travelers were found from a survey of Zhenfeng City. Based on the data, this paper developed MNL models about four main travel mode choices (walk, bus, car and motorcycle) of different gender, and six variables were used in the models. Overall, the models represented the gender differences in travel mode choice, and it was influenced by a wide variety of variables, including age, employment status, household income, number of cars, number of motorcycles and travel purpose.
Application of BP Neural Network Based on Matlab in Comprehensive Evaluation for Highway Network Planning
Authors: Wang Li
Published: August 2013

In this paper BP neural network based on matlab is inducted and applied in comprehensive evaluation for highway network planning. Network model is constructed through the training of the sample data (make sure weights and threshold) .In this model,the internal relationship between input and output is determined objectively without the influence of the subjective factors. An application example is given that has proved the model is right and valid,the evaluation results should be more objective.
Research on Safety Risk Assessment of Large-Scale Railway Passenger Station
Authors: Lan Ya Jing , Han Bao Ming , Li De Wei
Published: August 2013

Firstly, this paper expounds the concept of the safety risk assessment of large-scale railway passenger station. Then this paper introduces the overall process of safety risk assessment of passenger station, included assessment preparation phase, factors definition phase and Risk analysis phase. At last, as Beijing South Railway Station as an example, it expounds how to assess the risks and put forward some suggestions.
Research on Development of Wuhu Regional Logistics
Authors: Li Xin Jian
Published: August 2013

A logistics system is made up of a set of facilities linked by transportation services. Freight transportation plays a fundamental role in every modern supply chain as it allows production and consumption to take place at locations that are several hundreds or thousands of miles away from each other. Logistic networks are designed in order to get the right materials to the right place at the right time, while optimizing a given performance measure and satisfying a given set of constraints. This paper is to study providing object-oriented simulation constructs for Wuhu large-scale modeling of sense and respond logistics in supply situations.
Research on the Regional Sustainable Development Based on the Ecological Footprint Theory: A Case of Henan Province
Authors: Chen Hao , Li Chao Kui , Wang Li Dong
Published: August 2013

According to the ecological footprint theory and method, we launch to the calculation of the ecological footprint about 18 City of Henan Province in 2010. The result indicates that the regional development in Henan Province is in an unsustainable position. Among them, Pingdingshan and Jiyuan are in a state of strong unsustainable development.The cities of Zhengzhou, Luoyang, Jiaozuo, Sanmenxia, Anyang and Hebi are in a state of unsustainable development. The other 10 cities are in the state of weak unsustainable development.
Comprehensive Evaluation for Urban Public Transport Network Based on TOPSIS
Authors: Chen Fa An , Wu Zhou Hao
Published: August 2013

In order to improve the objectivity of urban public transport network evaluation and achieve the sub-file of quality level of preliminary scheme, a comprehensive evaluation method for urban public transport network was proposed based on TOPSIS, and then constructed the evaluation model of urban public transport network. This method was applied to Xian urban public transport network planning, which obeyed the basic theory of scheme evaluation and some related requirements. The result showed that planning-5 was the best one among the five urban public transport network planning in Xian and consistent with the passenger flow prediction. The evaluation model for urban public transport network based on TOPSIS was objective, which involved few parameters, simple operation, scientific evaluation and provided a basis for urban public transport network planning decision.
Research on Baggage Car Special Train Operating Plan
Authors: Liu Xiao Juan , Lang Mao Xiang
Published: August 2013

With the official operation of high-speed railway lines, the number of passenger train on the existed railway will be reduced with the transport capacity of baggage car lessen concurrently. Meanwhile the existing baggage and parcel transportation resources will be idle. According to the problem, in the context of fierce market competition and logistics developing trends of small pieces of goods express, a new product named Baggage Car Special Train to transport baggage and parcel is proposed and studied. Taking Beijing-Guangzhou channel for example, the Baggage Car Special Train planning on Beijing-Guangzhou line in 2015 is made out.
Calculation of the Carrying Capacity of Nanping Station Based on Non-Morkov Model
Authors: Zhang Ying Ying , Lang Mao Xiang , Wang Dan Zhu
Published: August 2013

In order to set up a queuing theory model and propose an improved method of capacity calculation, the existing equipment of loading station, railway line situation and technological processes were analyzed, then each operation time was determined in this paper. And queuing system of Nanping Station was taken for example. Based on the system structure and operations of the loading station analysis, a survey of the event flows of the arrivals and services in subsystems to derive the queue parameters of queuing subsystem was made. At last, the system capacity of the loading station was calculated out.
Exploration on the Role of the BOT Financing Model in the New Rural Construction
Authors: Zhong Xing Run , Zhao Jiang Ping
Published: August 2013

In building a new socialist countryside, are central in accordance with the scientific concept of development and China's rural areas has made the actual decision-making. In the present and for a time building a new socialist countryside will be the strategic task in rural reform and development. In advancing the process of building new rural areas have made gratifying achievements, but the new rural development cycle length, a wide range of tasks, in the course of implementation difficulties that could arise when building such as the problem of shortage of funds. This article initially discusses that the BOT financing model use in the new rural science and technology, culture, educational facilities construction. And make a simple comparative analysis between the BOT financing model and other modes. Finally this paper points out some problems to be explored in the further study.
Study on Model of Inventory and Distribution Joint Optimization Based on the VMI
Authors: Pang Ji Jun , Wang Xi Fu
Published: August 2013

This paper studies the problem of inventory and distribution joint optimization for two level logistics system of a supplier and multiple clients by building the model of inventory and distribution joint optimization based on VMI to reach the goal of minimizing the total system cost. Moreover, this article not only designs the iterative algorithm to solve the model, and determine the optimal inventory and distribution program from the perspective of system optimization, but also verifies the validity of the model and algorithm through using MATLAB software.
Simulation Analyzed of Vehicle Operating Safety in Rain Weather Condition Based on ADAMS
Authors: Si Hai Lin
Published: August 2013

The safety of vehicle operating has tight relation with the road condition; vehicle operating safety accident is easy occurred in badness road condition. This paper studied the vehicle Operating Safety in rain weather condition based on Multi-Rigid Body system Automatic Dynamic Analysis of Mechanical Systems (ADAMS). The models include Vehicle model, Road model, Vehicle and Road coupling model, Simulation module were set up. By changing road friction coefficient, road conditions in sunny day, dry, and rain weather were simulated. Single lane change text and ramp steering text were carried out, and the response output of lateral displacement was obtained. Computation result indicated that in the single lane change when road friction coefficient in rain weather is 0.4, vehicle speed is 60km/h in the single line simulation; the vehicle will be easily out of control. When vehicle speed is 55 km/h, maximum steer value is 70degree in the single lane simulation, vehicle will go haywire. In the ramp steer simulation when vehicle speed is 40 km/h, vehicle will go haywire.
Solving Balanced Bus Crew Rostering Problem with Genetic Algorithm
Authors: Ma Ji Hui , Liu Tao , Guan Wei
Published: August 2013

This paper addresses the balanced bus crew rostering problem (BBCRP). In this problem, the duty assignment to bus crews in a given time horizon should satisfy that the total workload should be evenly distributed. We firstly formulate the problem as a multi-level balanced assignment problem. Then, a genetic algorithm-based approach is designed to solve the proposed model. Finally, a simple numerical example is given to illustrate the application of the approach. Implementation results show that the proposed approach can obtain good quality solutions in a reasonable time and can be applied to real-life BBCRPs.
Development of a Model for Urban Rail Transit Construction Schedule
Authors: Guo Yan Yong , Wu Yao , Yu Yao , Xu Xin
Published: August 2013

This paper developed a model for urban rail transit lines construction schedule based on cumulative prospect theory. Firstly, six typical influencing factors of urban rail transit construction schedule were proposed and analyzed. Secondly, the decision matrix was build and standardized. In addition, the prospect value function was defined based on the cumulative prospect theory and gray correlation analysis, and an optimization model was constructed. Thirdly, the optimal weight vector was solved and the construction schedule was determined. Finally, a case study of Xian rail transit was conducted to verify the feasibility and effectiveness of the model.
Improved Heuristic Search Algorithm for Capacitated Vehicle Routing Problem
Authors: Ren Chun Yu
Published: August 2013

The paper is focused on the capacitated vehicle routing problem. And solve this type of problems utilizing improved Heuristic Search Algorithm from the overall situation. According to the features of the problem, the essay centered the construct initial solution to construct neighborhood structure. For the operation, 1-exchange and 2-opt* were applied, it can also fasten the speed of convergence, and boost the search efficiency. Finally, the good performance of this algorithm can be proved by experiment calculation and concrete examples.
Investigation and Study of the Law of Passenger Distribution in One Carriage of Subway in Beijing
Authors: Wu Qi Bing , Chen Feng , Fang Ji Ping , Liu Ou Yang , Liu Chang , Zhai Qing Sheng
Published: August 2013

The characteristics of passengers standing-position choice and the factors that have effects on passenger distribution are analyzed. According to the investigation results, the disproportion of passenger distribution in one subway carriage is confirmed. The curves about the standing passenger density (from 0-6p/m2) and the passenger number that use different facilities on Line 4 and Line 13 of Beijing Subway are fitted by means of the linear regression theory. Then, the equations of the curves are able to predict the passenger distribution under the situations of different standing passenger densities. After comparing the predicted values with the investigated values, the feasibility of the model is validated accordingly.
The Application Research Based on the Idea of Revenue Management in the Market of High-Speed Railway
Authors: Zhou Pei , Jia Jun Fang
Published: August 2013

Due to the fierce competition in the passenger market and the problem of low transportation capacity and seating rate in off-season, it is necessary for the railway station to carry out market-oriented revenue management and reasonable application of dynamic price control method, especially for the high-speed railway targeted at the high price and high quality of service. Combined with the practical operation situation of high-speed railway, the paper mainly puts forward the dichotomy method and implement step of dynamic price control and selling strategies with a limitation, considering the share of train all operation costs including the acquisition of train, aiming at providing certain suggestions for the operation management in high-speed railway.
Research of the Temporary Parking Acceleration-Spacing Model Based on Swarm Theory
Authors: Cao Jin Xin , Wang Lei , Zhang Wei Li , Wu Jun
Published: August 2013

The disturbance factors in the traffic flow may lead to traffic congestion. The agglomeration characteristics shown in traffic jams are similar to the biological swarm characteristics. In this paper, acceleration-spacing model is established based on the potential field method and the Lagrange method. The vehicle in front is viewed as the main force source. Then the data of the traffic congestion caused by the temporary parking in front of the school are used to calibrate the parameters of the model. It can be verified that the model is effective.
Research on the Auxiliary Emergency Decision-Making System of Urban Mass Transit on the Basis of Case-Based Reasoning
Authors: Yu Hong Fei , Qin Yong , Wang Zi Yang , Zhao Zhong Xin , Li Jun
Published: August 2013

To meet the requirement of networked urban mass transit, the characteristics of urban mass transit emergency decision-making was analyzed, draw lessons from the thought of case-based reasoning technology, the method which combine CBR technology with expert knowledge was proposed. On the basis of which, the emergency decision-making support system was designed, analyzed the system structure and function module, discussed the key technologies involved in the system, focused on the representation of retrieval technology and case contingency plans and case. Provides support for the modernization of urban mass transit emergency platform.
Reliability Evaluation Model of Highway Network Connectivity in Western Mountainous Area
Authors: Wang Xian Guang , Sun Xiao Nian , Wang Ming Wen
Published: August 2013

The research on the reliability of highway network connectivity has important significance in the western region. According to the characteristics of western mountainous highway, this paper sets up the reliability evaluation idea of highway network connectivity from the section to the route, from the route to the road network, and establishes the reliability evaluation model of the connectivity of section, route and road network based on the analysis of highway unit reliability. The research results provide the theoretical basis for western mountainous road network planning and construction as well as disaster-resistance and disaster-prevention countermeasures of highway system.
Fuzzy Comprehensive Evaluation of Safety System Risk of Airlines
Authors: Wen Xing Zhong
Published: August 2013

The scientific evaluation of the safety system risk of airlines is an effective measure, which can ensure its safety operations. In this evaluation, there are lots of fuzzy factors affecting the safety system of Airlines. The fuzzy theory is introduced to assess the risk of safety system of airlines. In this paper, an indicator system of safety system risk evaluation of airlines has been established. A model of safety system risk evaluation of airlines based on the comprehensive theory has also been set up. An experiment is conducted to examine the performance of this method. The experimental result shows that this method is rational and pragmatic in the safety system risk evaluation of airlines.
Study on Indoor Environment and Energy Technology of Inner Mongolia Grassland Dwellings
Authors: Dong Guo Ming , Liu Jia Ping
Published: August 2013

With the development of production and urbanization, many problems such as environmental pollution, energy shortages, ecological degradation, atmospheric warming and so on, have become increasingly serious, which results in that peoples attention of their living environment is further improved. In the wave of national sustainable development, Inner Mongolia autonomous region has come up with certain sustainable development policies since 2001, roundly discussing questions in terms of Inner Mongolia economy, society, resources and environment. The grassland living environment and ecological construction are also included. Taking the grassland habitat's typical living formMongolian yurt as an example, this paper analyses the climate adaptability and green ideas of grassland traditional dwellings, according to natural characteristics and energy resources of the grassland. With the purpose to provide valuable references for the sustainable development of grassland, this article points out some present problems and puts forward the corresponding measures of green renewal and ecological design.
Crossing Roads Safely: Influence of Various Vehicle Types in Gap Selection by Pedestrians
Authors: Wu Yu , Zhu Shun Ying , Wang Hong , Yao Fei , Zhu Huai Zhong
Published: August 2013

This paper analyzed the relationship between the gap selection and the types of oncoming vehicle in the process of pedestrians crossing the road. The oncoming vehicles were divided into large and small vehicle; six groups of pedestrians were recorded, young-male, mid-aged-male, old-male, young-female, mid-aged-female and old-female. The accepted gaps were recorded and analyzed using one-way ANOVA analysis. The results showed that, oncoming vehicles type had significant impact upon gap selection of pedestrians. A large oncoming vehicle had a shorter selected gap than a small oncoming vehicle. It is concluded that pedestrians have a smaller perceived velocity and overestimate the gap, large oncoming vehicle arrive conflict point. However, the overestimated gap was likely not safe to crossing the road. So, at no signal control intersection, a strict speed limit was necessary for large vehicle.
The Safety Assessment of Unpowered Mooring Vessel Based on Unascertained Measure
Authors: Zhu Gui Bing , Wen Xiao Fei , Liu Hu
Published: August 2013

The safety of the unpowered mooring vessel was influenced by human factors, vessel condition, meteorological factors, hydrological and environmental factors. To ensure the safety of the unpowered mooring vessel during mooring, on the basis of unascertained measure evaluation model, the method of Monte Carlo and interval weight was put forward to assess the safety of the vessel. This method enables policymakers, in the treatment of evaluation, to avoid weighing the key factors from the traditional model. It also provides more valid intervals for policymakers while dealing with uncertain information of safety elements and errors caused by human preference. Through a random value of interval weight using Monte Carlo simulation method, the final average value of the simulation is taken as the final weight. Finally, a 16000t unpowered mooring cargo vessel is taken as an example to have a detailed discussion of the application of this method, and a safety result is obtained according to each key element. This method can provide new evaluation method and references to policymakers concerned.
The Green Bus Overload Prevention Device Based on the Resistance Strain Sensor
Authors: Ma Yu Qi , Zheng Wei Gang
Published: August 2013

With the rapid development of transportation industry, the bus overload phenomenon is increasingly serious, overload effects people’s life safety badly, and also destroys highways and other infrastructures, using resistance strain sensor to test the total weight of the car can effectively reduces the occurrence of bus overload phenomenon.Besides using special floor made of trampling power generating device can generate power through the passenger's trample, stored in the storage battery, and supply the overweight detection device and other components, so to achieve the goal of energy saving and preventing the bus overload.
Freeway Ramp Controllers Optimized by Ant Colony Algorithm
Authors: Lan Yang Fang , Liang Xin Rong , Dong Chao Jun
Published: August 2013

A proportional plus integral (PI) control method based on ant colony optimization (ACO) is proposed to regulate the number of vehicles entering freeway entrance points. First, a macroscopic traffic flow model is established. Then the basic principles of an ant colony algorithm are formulated and the steps of ACO algorithm in optimizing the PI parameters are given. In conjunction with nonlinear feedback theory, on-ramp PI controllers optimized by the ant colony algorithm are designed. Finally, the control method is simulated in MATLAB software. Simulation results show that the ACO based ramp metering controllers are of good performance. This control method can eliminate traffic jams, maintain traffic flow stability, and make vehicles travel more efficiently and safely.
Application of PLC in the Expressway Intelligent Traffic Control System
Authors: Wei Xin Hua , Duan Xian Xing , Wang Xiao Kan
Published: August 2013

The expressway intelligent traffic control system based on S7-200 series Programmable Logic Controller (PLC) was introduced in this paper.PLC has strong adaptability in the complex environment and rich internal timer resources, it is easily to realize accuracy controlling the traffic lights, specially for multi-crossroads.PLC analyzed and processed the signals of the body flow, speed, vehicle size and other data by the sense coil, then transmitting the information to the host computer. The host computer might automatically adjust the length of time from the final signal to achieve intelligent scientific management of traffic lights.
An Experimental Analysis of Drivers Attitudes towards In-Vehicle Warning System at Stop Sign Controlled Intersection
Authors: Yang Ming , Yamanaka Hideo
Published: August 2013

Most traffic accidents occur at unsignalized intersections, mainly due to inappropriate behavior of non-priority vehicles. The authors have developed an advanced Intelligent Speed Adaptation (ISA) system with GPS/GIS to provide warning to stop failure vehicles at unsignalized intersections. In this study, experiments related to driver attitudes toward stop sign warning were carried out. At a drivers training course, drivers attitudes were tested using a vehicle equipped with the warning system in order to ascertain appropriate timing of warnings when approaching intersections. The drivers evaluation and willingness-to-pay for the warning system were also analyzed using an interview survey answered by testers.
A Study on Linear Coordinated Control of Intersection Signal in Youyi Street of Baotou City
Authors: Zhang Xin Jie , Yu Jing Fei
Published: August 2013

As the changing situations of the traffics, according to demanded traffic speed and the distance between two adjacent intersections, a multi-scheme continuous entrance system is taken. The method determine an appropriate time difference in order that vehicles travel in appropriate speed will continuous meet the green lights cross by cross. Furthermore, studies on linear coordinated intersection signal control is the basis of research of area traffic signal control.
Genetic Algorithm Optimization in Vehicle Routing Problem
Authors: Zhang Lang Zhi , Chen Song Yan , Cui Yong Yue
Published: August 2013

Numerous strategies for optimizing vehicle route based on genetic algorithm (GA) have been put forward. However there is still much room for improvement despite the existing experiment results. In this paper, significant improvement of traditional genetic algorithm is achieved, dealing with discrete vehicle route optimization. In view of multi-client points equally distributing around logistics centre, initial group optimization being performed, crossover probability being decreased, mutation probability being improved, chromosome calculation being simplified, optimization being accelerated and genetic performance quantity is reduced. All this offers powerful support to genetic algorithm for multi client points.