bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation of Misrun Defect of Bimetallic Composite Pipe by Investment Casting
Authors: Li Cheng Zhang , Tang Hai Yan , Li Jing She , Yang Hong Bo
Published: December 2012

The casting and solidification process of the bimetallic composite pipe were simulated by ProCAST software aiming at the misrun defect in the pipe. The causes of defect were analyzed from the factors of the pouring temperature, pouring time, preheating temperature of mold and the height of sprue. Reasonable improvements were presented based on the simulation results. Industrial tests showed that misrun defect disappeared after the process was improved, which in turn verified the effectiveness and reliability of simulation results.
Study on Response of Adhesively Bonded Joints under Transverse Impact
Authors: Zhang Jian Guang , Chawla Krishan K. , Vaidya Uday K.
Published: December 2012

The response of adhesively bonded joints subjected to a transverse impact was investigated. The joints were bonded by two-part acrylic adhesive DP8005 with using two types of adherents, polypropylene and glass fiber reinforced polypropylene. The lap joints were impacted by a drop weight with hemisphere tip at a low velocity. An energy model was applied to evaluate the effect of the properties and thickness of adherents on the impact strength of the joints. The results from model showed good agreement with those from experiments.
Studies on the Technology of the Fine Blanking without Gear Ring of Steel Back Plate with Mechanics Properties and Material Properties
Authors: Zhu Chun Dong , Zuo Wen Hao , Zhou Bo
Published: December 2012

The steel back plate is one of the important parts of automotive friction brake block, and the current production technology is conventional blanking technology, which obtains only a low percentage of bright surface. The fine blanking without gear ring technology makes the steel back get a higher percentage of the bright surface. Based on finite element simulation, the effects of different outlines and different process parameters on the percentage of bright surface during fine blanking without gear ring of steel back plate were investigated in this paper. According to the results, the best process parameter in every single factor was obtained, which offers guide for the technology of the fine blanking without gear ring of steel back plate.
Studies on the Oiler Edge without Being Sprayed Based on Material Properties and Aerodynamic Influences
Authors: Li Hai Ying , Wu Hua Liang , Chen Xiao Hong , Xie Sheng Jian
Published: December 2012

This article introduced some experiment processes and conclusions that strip edge wasn’t sprayed when the electrostatic oiler was working, observed and analyzed several factors influencing spraying effect, put forward two effective method to resolve this problem: simulating the strip edge and making the blade staggered each other.
Experimental Research on the Cracking Behavior of GFRP/Steel Wire Composite Rebar Reinforced Concrete Beam Based on Cracking Mechanics
Authors: Wang Chuan , Sui Li Li , Hao Qing Duo , Lu Qi Yu
Published: December 2012

The different mechanical property determines the difference on cracking behavior between GFRP/steel wire composite rebar reinforced concrete beams and steel rebar reinforced concrete beams according to cracking mechanics. In order to study the cracking behavior of concrete beams reinforced with GFRP/ steel wire composite rebar, five simply-supported beams were tested under three-point static load. The test variables were beam section size and concrete cover depth. Based on analysis on the test results, the calculation methods of cracking capacity and maximum crack width were proposed, and the limit value of crack width was suggested.
Study on the Corrosion Resistance of ZrN Films on the Aluminium Alloys Surface
Authors: Wang Hui Qiang , Sun Wei Lian , Xing Yan Qiu , Bo Sun
Published: December 2012

Aluminum alloy have the active chemical properties,low standard electrode potential, and the surface will be easily forming about 1-3nm oxide film in dry air, therefore aluminum alloy have the poor corrosion resistance.ZrN film deposited by mid frequency reactive magnetron sputtering process on aluminium alloy surface in order to improve the corrosion performance. Study the influences of nitrogen flow rate, sputtering time and temperature to the corrosion performance. The results show that: The corrosion performance of ZrN films will be improved with the nitrogen flow rate increase,but when the nitrogen flow rate was more than 18sccm, ZrN film corrosion resistance will be reduce;The corrosion performance improved with the sputtering time increase,when the time reach 15min, ZrN film corrosion resistance was no longer increase;The corrosion performance improved with the temperature, when the temperature reach 130°C, the corrosion resistance was no longer increase.The best process parameters was: nitrogen flow rate 18sccm, sputtering time 15min, temperature 130°C.
Study on Mechanics Properties of Automobile Rear Axle Shell and Optimization Design in Manufacturing System
Authors: Bai Xin Li , Zhang Ying Fang , Zhao Ya Wei
Published: December 2012

The mechanics properties of a certain automobile rear axle shell were studied and a large displacement, large strain elastoplastic finite element analysis was carried out. and the followings were obtained: the load-displacement curve at loading point, elastoplastic strain-load curve at the maximum stress point, elastoplastic stress-load curve in dangerous cross-section, and the yielding load at which the dangerous cross-section overall yield. The results show that elastoplastic finite element simulation results are much closer to the experimental corresponding results. Through optimization design in manufacturing system, the weight of the rear axle shell is greatly reduced as compared with the original design. Optimal design not only saves materials and reduces cost, but also greatly reduces the design time. The calculation results provide the necessary data for automobile rear axle design, strength evaluation and fatigue life estimate.
Visual Detection of Machining Damage on Aerospace Aluminium Alloys during Manufacturing Process
Authors: Ma Yan Long , Liao Yi
Published: December 2012

In aerospace industry, chromic acid anodizing (CAA) has been traditionally used as a non-destructive testing (NDT) technique to detect flaws in aluminium alloys. However, with the increasing restriction on the use of chromic acid and the application of lithium-containing aluminium alloys to aircraft structures, the capability of anodizing as a NDT method is challenged. In this work, machining damage was deliberately introduced to an Al-Li-Cu alloy AA2099-T8. Then, the visibility of the machine damage after tartaric-sulphuric acid anodizing (TSAA), which is an environmentally friendly anodizing process, was studied. It is suggested that, with proper lighting condition, it is possible to replace CAA with TSAA for detecting machining damage on lithium-containing aluminium alloys during manufacturing.
Lapping Tool Wearing Uniformly in Machining Blind Hole of Workpiece in Manufacturing System
Authors: Yang Jian Dong , Liu Chuang , Yan Hui
Published: December 2012

This paper proposes a new method of controlling abrasives density distribution on the machining surface of a lapping tool making full use of controllability of abrasives density distribution in solid abrasive lapping, based on the present actual problems in solid abrasive lapping blind holes in manufacturing process. This method makes the abrasives density distribution on the lapping tool surface fit the wear intensity distribution of lapping tool, which makes the lapping tool wear uniformly in this manufacturing process, does not lose its original surface accuracy, ensures shape accuracy of the machined holes of the workpiece, also avoids the trouble of dressing lapping tools, reduces auxiliary machining time, improves machining efficiencies, reduces the consumption of abrasives and reduces machining costs of the manufacturing process.
Modified Green’s Function Approach Using Temperature-Dependent Material Properties and Stress Properties for Thermal Fatigue Analysis
Authors: Ko Han Ok , Jhung Myung Jo , Choi Jae Boong
Published: December 2012

Fatigue damage caused by alternating operational stresses in terms of temperature or pressure change is the one of important damage mechanisms in the nuclear power plants (NPPs). Although components important to safety were designed to withstand the fatigue damage, cumulative usage factor (CUF) at some locations can exceed the design limit beyond the design life. So, it is important to monitor the fatigue damage of major components during the long term operation. To evaluate fatigue damage, the Green’s function approach has been generally used. In this approach, thermal stresses can be directly calculated from the convolution integration on the coolant temperature history and Green’s function. And, Green’s function is defined as a stress variation at the arbitrary point when the coolant temperature is increased as a unit step. However, this approach cannot be applied to the fatigue analysis using temperature-dependent material properties because it is assumed that the system is linear. In this paper, the modified Green’s function approach considering temperature-dependent material properties is proposed by using neural network. To verify the modified Green’s function method, thermal stresses by the proposed method are compared with those by finite element analysis (FEA) at the transition wall of reactor pressure vessel and the analysis results between two methods are well agreed. Finally, it is anticipated that more precise fatigue evaluation is performed by using the proposed method.
The Research of Bottleneck Procedures of Truck Frame Assembly Line in Manufacturing System
Authors: Ma Yan Hua , Zhao Ke Li , Zheng Yu Bin , Zhu Xin Yu , Pan Yuan Chao , Huang Liang Liang
Published: December 2012

In this paper, we take F3 team in the Truck Frame Assembly Line as research object and analyze the production line balance[1] in manufacturing system, through the related knowledge we have learned. Then we can improve the bottleneck procedures in order to reduce the bottleneck time and make the assembly line achieve the best production condition by some measures, including segmentation of the bottleneck procedure, improvement of the site layout, changing the operating personnel and improvement of existing operation.
Dynamics and Steady Analysis of the Plate High-Density Pipe Flow System with Fuzzy Reasoning Synthesis Method
Authors: Chen Xiao Hong , Xu Hui , Xie Sheng Jian , Zhao Hong Wu
Published: December 2012

In the paper,the plate high-density pipe flow systems dynamics and steady are analyzed and some on-site data is collected.Fuzzy reasoning synthesis method is used to establish fuzzy model.Using Matlab software on the model is simulated,and the result proves that the model have high accuracy.
Simulation of Influencing Parameters of the Inner Surface Pressure of Elbow Pipe and the Establishment of Pressure Formula
Authors: Lu Xiao Yang , Lu Xiao Li , Huang Li Li , Liu Jin Ming , Liu Ying Yue , Xu Yi Min
Published: December 2012

According to the variation of the flow parameters of the flow velocity v, outlet pressure P0 and fluid density ρ by using the FLUENT software, the influencing regularity of the distribution of the inner surface pressure in elbow pipe was analyzed. Based on the study, the pressure computational formula for 90 degree elbow pipe on the characteristic section α=45° was built. The research conclusion lays the groundwork for strength check and structural design of the elbow pipe.
The Design of AT-Cut Multiple-Electrode Quartz Crystal Resonator and the Research of its Oscillation Stability and Force-Frequency Property
Authors: Sun You Bin , Tian Wen Jie , Zhao Qing Jiang , Lan Bai Yang
Published: December 2012

According to the oscillation characteristics of the quartz crystal resonator and the relationship between its force sensitive property and stress distribution on crystal plate, the single-base multiple-electrode quartz crystal resonator is designed. The oscillation stability of the resonator with this structure is tested by using crystal frequency stability tester. The force-frequency property of the resonators formed by electrodes on different positions of the new structure crystal plate is studied by adding radial force on it. The experimental results show that when the new structure quartz crystal resonator works driven by integrated chip, its oscillation frequency stability can reach 10-8, with the electrode thickness increasing, the oscillation stability of the resonators improves. The force-frequency property of the resonator on the different position of the same crystal plate is different, and the force-frequency coefficient has an obvious difference. The total force-frequency coefficient of the newly designed single-base three-electrode quartz crystal resonator can reach 338.8Hz/N by using mix frequency process.
Force Sensitive Property of Same-Base Quartz Crystal Resonator and Signal Amalgamation
Authors: Tian Wen Jie , Zhao Qing Jiang , Sun You Bin , Lan Bai Yang
Published: December 2012

According to the stress distribution in the thin round-shaped quartz plate with radial force, multiple resonators are designed in the different positions on same quartz crystal wafer. The force sensitive property of the resonators in different positions is studied. The research result shows, the force sensitive property of the resonator is closely related to the locations and the adding force azimuth; the force sensitive property of the resonators in different positions have a significant difference. If making difference frequency process of the resonant frequencies which is produced by the resonators, the interfering factors of the temperature etc. can be inhibited; if making superposition and integration process of the resonators’ force sensitive property, the total force sensitive property of the resonator with the multiple-electrode structure can be improved.
The Study of Modeling Methods Based on Applied Mechanics for Sling of Tower Crane with ADAMS
Authors: Han Yun Peng , Meng Jian Ping , Chen Deng Chong
Published: December 2012

Along with the rapid development of construction industry, tower crane becomes the indispensable machine in building trade. Using a simple and effective modeling method for sling is a crucial step in the analysis of tower crane. The 6 different models for sling of the tower crane were established by using the finite segment method of ADAMS in this paper, and the simulation of the sling based on applied mechanics was done. The conclusion was drew that in the modeling of sling, a rigid rod can substitute for sling, in the case that the resistance and axial stretching deformation of the sling were neglected. So a simple modeling method was given for sling of tower crane in a special case.
Reflections on Environmental Inspection Culture Building
Authors: Sun Shi Yu
Published: December 2012

This paper analyzed the importance and necessity of building environmental inspection culture system, then system framework has been constructed by referencing that established in labor security supervision department and disciplinary department. Six cultures in the system are: philosophy culture, responsibility culture, organization culture, behavior culture, system culture and incorruptibility culture. By discussing content of each culture, several recommendations have been made including people-oriented philosophy culture abstraction, high-efficient responsibility culture highlight, distinctive organization culture improvement, internal and external behavior culture enhancement, orderly system culture and complete incorruptibility culture construction.
Prediction Model for Pinus sylvesris L.var.monogolica Litvin Plantation
Authors: Zhao Li Jun , Li Feng Ri , Jia Wei Wei
Published: December 2012

Forest biomass research data is the basic of researching many forestry and ecological issues therefore, accurately determining the forest biomass is very important both in production and in theoretical research .and it has the world's forest scientists and ecologist’s attention. Forest biomass research data is the basic of researching many forestry and ecological issues therefore, accurately determining the forest biomass is very important both in production and in theoretical research .and it has the world's forest scientists and ecologist’s attention．In this paper, the studies are the different ages, different densities of Pinus sylvestris (Pinus sylvestris var. Mongolia Lit v.) plantation ,based on the biomass data oItalic textf 9 standards and 45 standard wood in the trunks, sticks analytical, researching the age and density impacting on forest biomass; Statistic the distribution of part of the biomass, research the biomass of the relationship between the different size trees factor (diameter, height, crown and so on) and the single-wood components (tree trunks, branches, leaves) , Establish the regression model of part of the single-wood through applying the statistical analysis software; Estimate the total biomass of Pinus sylvestris plantation forest through using the single-wood biomass regression model, Estimate biomass of Pinus sylvestris plantation forest ,and analysis the changes of forest biomass of different age and stand density. This paper provide basic information for the researching of Pinus sylvestris plantation as well as scientific basis for understanding the productivity of Pinus sylvestris Plantation and reasonable business on it.
The Efficiency of Natural and Electrokinetic Enhanced Migration of Pb in Aquifer
Authors: Hu Hong Tao
Published: December 2012

The natural and electrokinetic enhanced migration method was studied by the experiments in groundwater contaminated by heavy metal Pb in this work. The experimental results showed that the variation rule of Pb reflected that its migration was weak and the removal efficiency was only 9.30% near the anode in the natural seepage condition, but under the enhanced migration and remediation function, the pollutants could be enriched and removed faster, thus the removal efficiency of Pb was 46.72% near the anode at the end of experiment when the experimental voltage gradient was 0.28V/cm, which made known that this electrokinetic enhanced migration of Pb in contaminated groundwater was more effective method than that of natural seepage migration and enhanced the removal of contaminant in aquifer.
Case Studies of Strategic Environmental Assessment on Urban or Regional Comprehensive Plans in China
Authors: Tian Li Li
Published: December 2012

In order to achieve urban and regional sustainable development, many strategic environmental assessment (SEA) practices for urban or regional comprehensive plans were conducted in China. An urban or regional comprehensive plan plays an important role in the planning system of China. Through three case studies, the paper examines how the SEAs incorporate environmental considerations into the urban or regional comprehensive plans in practice, and discusses the experiences and shortcomings. The findings show that support from government agencies, timely interaction with planners, participation of multi-stakeholders, linkage mechanism between SEA and project EIA, and improvement of environmental governance capacity can favor the integration of environment into the comprehensive plans. And more effort should be made to strengthen the general public participation and institutional analysis in the SEA practice in China.
The Analysis of Planning Guide Effect of Guangzhou Metro Line Five’s Construction to the Non-Existed Central District of the City
Authors: Zhao Qian , Tang Jian
Published: December 2012

This essay discusses the effect of what the construction of the Metro Line Five of Guangzhou has to the development of existing central district and non-existed central district of Guangzhou City. Through the investigation and research into the quantity change of the public facilities around every exit of Metro Line Five within 500 meters, the essay analyses the planning guide effect of the construction of Metro Line Five to the land development and city construction of Guangzhou.
Transportation Accessibility Research on Shenyang TieXi Industrial Corridor Area
Authors: Zhao Wen Hua , Zhang Bin , Zheng Da Wei
Published: December 2012

Based on the weighted average time distance index, calculated the accessibility of 9 township nodes in Shenyang TieXi industrial corridor area with interpolation method and analyzed and appraised the whole area of accessibility. The results of the study show that, Shenyang TieXi industrial corridor accessibility spatial pattern is irregular saddle concentric ring distribution, and the accessibility centre is located in the town of Xinmintun, the outside accessibility to the worse, and show certain directivity of rapid trunk road.
Port Competition in the International Transshipment Hub Sector, Busan and Shanghai
Authors: Huang Xiao Ling , Roiseux Racine Philippe , Tian Liang
Published: December 2012

This paper aims to present which port located in the North-Asian region can best fulfill the role of a hub int’l/int’l container transshipment port. The port of Shanghai is compared to the port of Busan in terms of types of traffic, their infrastructures, nearby competition and geographic position in relation to the major international shipping routes. An overview of their function due to their respective economy is also addressed.
Urban Rail Transit Passenger Transport Microcosmic Simulation Model Framework Design
Authors: Wang Zhi Qiang
Published: December 2012

This paper from the network level design the urban rail transit passenger transport microcosmic simulation model. Take the model’s achieve and apply as a target, through analyse the simulation model’s class library and its properties, design the event driven model, optimize the model frame and etc work, develop the urban rail transit passenger transport microcosmic simulation system, and through the Suzhou Rail transit planning network’s calculation example, verified the system’s availability.
Energy Consumption and CO2 Emission in Transportation Sector: A Comparison among BRIC Countries
Authors: Huang Yin , Wang Meng Jun
Published: December 2012

With the growth of population and vehicles, transportation sector is taking up the major share of energy consumption and CO2 emission in BRIC Countries. This paper is intended to analyze the energy, emission and environmental situation of the transportation sector in BRIC Countries from an energy point of view. Historical data is used to investigate the energy consumption in BRIC Countries from 1990 to 2009. A method of calculating CO2 emissions is employed in transportation sector of BRIC Countries. The total CO2 emission and emission from sub-sector of transportation in CO2 emissions of the four countries are described. The polices to reduce energy consumption and emissions are suggested to give a richer understanding of current status in transportation environment of BRIC Countries
Preliminary Study on Mountain Urban Color Planning - Take Yichang for Example
Authors: Duan Zhong Yuan , Li Gui Yuan
Published: December 2012

Urban color as one of carrier of the city history culture, memories and character, its role in the city construction is obviously. The paper is based on research of urban color theory,such as the color geography, color psychology, color grading planning research methods, through to make detailed investigation about the color corridor - important nodes of building color and environment color , and summarize its characteristic and problems, put forward the related suggestions of Yichang.
Research on Recovery Model for Flight Disturbance of Airlines
Authors: Zhang Xiang Hui , Bai Fu Li
Published: December 2012

Recovery management on fight disturbance serves as an important item in emergency management of airlines. This paper discussed the rule of recovery model establishment for flight disturbance of airlines, established recovery model for flight disturbance based on approximate model for time slot, and took the failure of an airplane for a whole day as an example for analysis. The results show that flight adjustment through established model can reduce cost and provide more effective flight allocation solution for airlines.
Optimal Prediction for Braking Speed of Urban Rail Vehicle
Authors: Zhang Meng Nan , Xu Hong Ze
Published: December 2012

The accurate measurement of the speed of urban rail vehicle is the basis of normal operation of the train controlling. Since speed measuring devices of vehicle-borne is inevitably disturbed by the sensors or the external environment, the deviation between the measured speed and the actual value, which varies randomly, is impossible to eliminate. This paper utilizes the method of minimum variance prediction to predict the speed of the train. By this way, the variance of the deviation between the predicted value and the actual value of the speed can be minimized. The model of the speed of the train is also discretized, which overcomes the shortcomings that the transitional models and control theory are limited to theoretical analysis but cannot be used in the actual computer control systems. In the section of simulation, the article shows the actual simulation results, which prove that this method has strong practicability.
Study of Travel Mode Choice Behavior Based on Nested Logit Model
Authors: Shang Bin , Zhang Xiao Ning
Published: December 2012

Not only multinomial logit (ML) model is usually used in the analysis of travel mode split, but also nested logit (NL) with the method of phased estimation is used. NL model was developed in the paper which used the simultaneous estimation method to analyze travel mode choice behavior on the basis of the basic theory of disaggregate model and data of stated preference survey (SP). In the course of estimating the parameters, the multi-constrained optimization function in optimal tool of MATLAB was used to solve the maximum likelihood function. Using this method, the parameters of model could be calibrated at the same time. The hit ratios are also accurate. It is found that the NL model approach can consider more factors affecting the travel mode choice of residents, improve the prediction accuracy of model and practicality.
Research of Vehicle Scheduling Problem and Algorithm Based on Emergency Needs
Authors: Wen Ya Jing , Wang Zhuo , Dong Hong Hui , Liang Yi Chao , Jia Li Min
Published: December 2012

There will be some emergency needs which will disable the predetermined route during the vehicle scheduling, and affect the whole distribution process. The existing algorithms cannot efficiently and accurately solve these vehicle scheduling problems with the emergency needs. This article improved the C-K algorithm with the time window and the stowage constraint, studied the carriage of goods in Hebei province, and solved the emergency needs of vehicles scheduling problem, and the operation speed will be faster, the algorithm steps will be not complicated. Thus, vehicles scheduling route with burst situation will be redefined efficiently and accurately, and efficiency will be improved, resources inputs will be reduced, so that the cost will be saved, interests will be maximized. This article improved the existing logistics, and played a role in promoting the logistics capabilities and management.
Research on the Traffic Simulation Platform Based on the Real-Time Mobile Phone Data
Authors: Qi Ge Qi , Wu Jian Ping , Du Yi Man
Published: December 2012

With the rapid development of the society, the transportation system has become more complicated and vulnerable. For simulating the real-time traffic condition of the whole city, a wide range of OD matrix data are needed which are hard to collect in whole based on the present conventional methods. The paper raises a feasible design of the traffic simulation platform based on the real-time mobile phone data. The popularity and development of mobile phones make the vast amounts of real-time traffic data can be collected and usable. With the help of the GIS module, dynamic OD traffic generation module and other related modules, the real-time mobile phone data will be converted to the valuable traffic data and applied to the traffic simulation platform.
A New Automatic Detective Method of Traffic Incident
Authors: Zhang Huan Jiong , Jin Xiao Ping , Zhang Ping
Published: December 2012

Based on the change of the distance function and mobile direction angle function which are from the vehicle GPS systems, a novel traffic incident automatic detection system is designed in. Not only does the principle of this method is deduced, but the properties and the experiment of this method are analyzed. With the experiment, this novel automatic detective method expresses some advantage properties.
Research on Train Control System Based on Communications
Authors: He Lin Na
Published: December 2012

This paper introduces communication based train contrl (CBTC) technology, focusing on the concept of the CBTC , the CBTC system structure, and the CBTC system basic principle. This paper presents the CBTC system is composed of two parts by the train control system and wireless information transmission, the CBTC system using wireless communication technology to achieve real-time bi-directional communication in the train and the trackside equipment, through an open data communication network. Finally, data communication subsystem network architecture in the CBTC system has been studied.
A System Analysis Tool for Airline Gate Assignments
Authors: Tang Ching Hui , Wang Wei Chung
Published: December 2012

The airline-specific gate which is exclusively used by a specific airline has been applied in many airports. In this study, we follow the above consideration to develop a system analysis tool for gate assignment problem occurred in the airline industry. The system tool is embodied in an optimization design model resulted from an airline’s perspective. Numerical tests, based on the operations of a Taiwanese airline, are carried out to demonstrate the performance of the proposed system tool.
A Study on the Value of Integration Development of Urban and Rural Public Sports Service
Authors: Liu Chao , Chen Wei
Published: December 2012

The integration development of urban and rural public sports service is the momentous content of building a harmonious socialist society. On the basis of the public service theories of management science, sociology and other related areas, the concept and connotation of the integration development of urban and rural public sports service were defined，the significance and value of which were discussed in details.
Application of Composite Ant Colony Optimization in Logistics Distribution Center Location
Authors: Liu Xiao Lan , Zhang Wu Yi
Published: December 2012

A new model called location, routing, production and sale problem(LRPSP) is proposed for logistics distribution center location in the paper. In this model vehicle routing problem(VRP) and the balance or imbalance problem of production and sale are considered, because all these would influence the selection of locations of logistics distribution centers. And also ant colony optimization(ACO) for clustering and ACO for finding the shortest route are introduced to assign clients to distribution centers and solve VRP respectively for the model. Through designing the transition probability, the tabu list and the way to update pheromones reasonably, the composite algorithm of ACO for clustering and ACO for finding the shortest route(CACO) for LRPSP is realized and the computer program is designed by Java. Finally, it’s proved by a simulation case that CACO is feasibility and scientific effectiveness for LRPSP.
Study on Optimization Model of Multiple Depot Vehicle Scheduling in Logistics Distribution of Expressway Service Area
Authors: Zhou Qian , Xu Chun Long , Liu Jun
Published: December 2012

Based on the unblocked reliability theory of the road network, combined with the characteristics of the logistics distribution of expressway service areas, the concept of network unblocked reliability on logistics distribution was put forward. Under the reliability analysis, the optimization model of multi objective, multi depot and open vehicle scheduling on logistics distribution of highway service areas was established, and the ant colony algorithm was designed. In the end an example was analyzed to validate the usability of the optimization model by comparing with saving mileage, which demonstrates the established optimization model of multiple depot vehicle scheduling is of a better practical value to guide the optimization decision making of logistics distribution network and to improve the reliability of logistics distribution of expressway service areas.
An Evaluation Method of Route Risk for Regional Emergency Logistics
Authors: Luo Jian Feng , Ma Tian Shan
Published: December 2012

Based on the route risk analysis of regional emergency logistics and combined field investigation , a two-level indicator system of emergency logistics’s route risk, which consists of time risk indicator ,safety risk indicator , information risk indicator,flexibility of the scheme indicator. The higher-level indicator is regarded as t he class of lower-level indicator.Within the same indicator class, principal components analysis method can be used to reduce indicators .The weight of index system are decided by improved analytic hierarchy process (IAHP) evaluation method on the baisi of careful investigations, Then the evaluation process of regional emergency logistics ’s route risk is set up by fuzzy evaluation method,which overcoming neglection of both subjectivity and objectivity.
Online Shopping Logistics System Improvement Based on TOC
Authors: Zhang Yao Li , Xie Guang Ying , Chen Jing
Published: December 2012

Introduced TOC and focusing five-step process first and found two constraints of online shopping logistics system according to it, the logistics distribution time in the destination city and the time from delivery to confirmation on the internet. Both of them are settled through two cycles of focusing five-step process.
Research on RFID Application in the Food Supply Chain
Authors: Lin Xiao , Gao Wei Long
Published: December 2012

With the development of the information technology, Radio Frequency Identification (RFID) has become a hot topic in the fields of manufacturing and logistics. Meanwhile, food security becomes a worldwide problem. Food hazards can appear at any stage of global food supply chains, making it essential to define critical control points to capture the data about ingredients, manufacture and dates-certain, and provide it in a transparent manner to supply chain participants and consumers. In this article, I will analyze the current food supply chain situation and promote the literature review of RFID application in the food supply chain. And then the article will explore the questions and future research on RFID application in the food supply chain.
The Research of the Power Mechanism in the Coastal City Spatial Expansion in Period of Rapid Urbanization - Take Qingdao as an Example
Authors: Zhang Hong En , Chong Xu , Tong Nie
Published: December 2012

Since reforming and opening-up policy, the internal reason of fast urbanization caused the restructuring of the city space. But the affects of unique marine resource in coastal city in the urban spatial expansion process can not be neglected. From the perspective of dynamic factors take Qingdao as an example, in this essay, the research would be done to discuss about the coastal city's influence on the expansion of urban space in port economy , the industrial structure, land policy, living factors and other aspects.
Evaluation of Regional Anti-Disaster Ability of Highway Natural Disasters
Authors: Qi Hong Liang , Tian Wei Ping , Li Jia Chun
Published: December 2012

In order to evaluate the regional anti-disaster ability of highway natural disasters, this paper analyzes affections of regional social economic, regional highway natural disasters management, and regional highway natural overview. We establish an evaluation system of regional anti-disaster ability of highway natural disasters based on our main indexes, which include the investment percentage of region GDP on regional disaster prevention, regional highway disaster management, and the quantity of disasters in per kilometer. Integrated score is used as the method for evaluating regional anti-disaster ability. Grading and scoring methods for the evaluation indexes are put forward. Based on the method, evaluation model and grading methods for regional anti-disaster ability of highway natural disasters are resolved.
Traffic Carrying Capacity and Improving Measures of Shenzhen
Authors: Wu Ling Sheng
Published: December 2012

With the rapid growth of cars, road traffic of Shenzhen continued approaching even beyond the limits of carrying capacity, This paper analyzes the status quo of Shenzhen traffic capacity, traffic capacity in the fully integrated on the basis of factors, scenario analysis, the ultimate bearing capacity of Shenzhen traffic proposed improvement measures. The context of tight constraints of resources, economic, social and environment, resources, coordinated and sustainable development.
A Study on Problems and Countermeasures in Old City Reconstruction in China
Authors: Ning Bi Bo , Tian Wei Li
Published: December 2012

With the development of urban construction, urban renewal and transformation is the trend of urban construction and development, it cannot be avoided, and it is the inevitable process of urban development. China's 20 years of rapid economic development led to the acceleration of urban renewal in full swing. Renovation of old urban construction has become a very thorny issue. This paper analyses problems and countermeasures in Old City Reconstruction in China, and gives some Suggestions from operating mode and development mode and laws and regulations.
Study of Travel Time Prediction by Using Online ATIS and Probe Vehicle in Beijing
Authors: Song Bing Yue , Wu Jian Ping , Du Yi Man
Published: December 2012

With the rapid development of urban traffic, travel time had become the crucial factor for road-user to make decisions on means of transportation, path finding. Besides, emerging information technology, such as Traffic information technology, GIS (Geographic Information System) technology and etc, that have promoted the tendency that people are inclining to plan personal travel through Dynamic Route Guidance System characterized as travel time prediction according to real-time traffic data. In this paper, it first proposed the factors of selecting the test O-D (original-destination), which travel time will be predicted by GoogleMap, BaiduMap, SogouMap and SOSOMap, for comparison, probe vehicle would run along the route provided by those online ATIS (advanced traveler information system) to check the accuracy of travel time predicted. Finally, it analyzes and assesses the service of travel time prediction of such systems.
Predicting Pedestrian Conflict Avoidance Behavior during School Commute Time
Authors: Liu Ming Wei , Cao Shou Qi , Zhang Li Zhen , Sumi Tomonori
Published: December 2012

In this research, we adopt pedestrian’s avoidance behavior as the primary indicator of degree of danger and also use discrete choice models to predict this. Through this model, we quantitatively evaluate the dangerous in school road, develop a good understanding of microscopic mechanisms of road traffic, and finally evaluate the possible effects of traffic improvement measures through quantitative measures.
The Assessment Index System for Traffic Simulation Study in China
Authors: Ru Hua Suo , Peng De Pin
Published: December 2012

This paper analyses the road traffic operation in four typical situations including unsignalized junctions, signalized junctions, road sections and road networks in China. Four major factors such as road facilities, efficiency, safety and environment containing over twenty sub-factors are identified and weighed using analytic hierarchy process to form a holistic assessment index system which suggests a guideline for China’s road traffic simulation study.
Vehicle Travel Time Prediction in Spatio-Temporal Space
Authors: Li Qing , Lam William H. K. , Tam Mei Lam
Published: December 2012

It is recognized that travel times on a link are temporally correlated with its travel times of previous time periods. Also, the link travel time are spatially correlated by travel times on its neighboring links. Based on such temporal and spatial correlations, a new method is proposed for travel time prediction in urban roads. The proposed method is capable of rapidly predicting the link travel time in the near future. For validation of the proposed method, the temporal and spatial variance-covariance of travel times on related links are employed together with historical travel time data. It is found that the proposed method is able to provide more accurate travel time prediction.
Study of Transit Priority Strategies on Intersection under Multi-Restrictions
Authors: Wei Li Ying , Wu Rong Hua , Zhang Li Li , Sun Jian , Wang Zhi Long
Published: December 2012

Recent years, traffic congestion is evolved into an urban disease that rejects to the urban development. Besides, it also makes multiples of exhaust pollution. To release this problem, the most effective way is to develop public transport. This paper established a model (PI) of transit priority strategies based on delay, queue length, quantities of wait vehicles, fuel consumption, CO emission, and HC emission. Among them, fuel consumption, CO emission, and HC emission are environment elements that added to this paper for the first time. After that, an evaluation is made based on cellular automata simulation, showing that the efficiency is improved by 17.7 percents when using multi-restrictions transit priority strategies, compared to that without any transit priority strategies.
Equilibrium Assignment Model with Uncertainties in Traffic Demands
Authors: Kuang Ai Wu , Huang Zhong Xiang
Published: December 2012

In this paper, we present an equilibrium traffic assignment model considering uncertainties in traffic demands. The link and route travel time distributions are derived based on the assumption that OD traffic demand follows a log-normal distribution. We postulate that travelers can acquire the variability of route travel times from past experiences and factor such variability into their route choice considerations in the form of mean route travel time. Furthermore, all travelers want to minimize their mean route travel times. We formulate the assignment problem as a variational inequality, which can be solved by a route-based heuristic solution algorithm. Some numerical studies on a small test road network are carried out to validate the proposed model and algorithm, at the same time, some reasonable results are obtained.
The Innovative Financing Model for Electronic Bus Development
Authors: Zhu Zong Wei , Ou Shih Ming
Published: December 2012

The development of electric bus is crucial to the energy efficiency and CO2 reduction policies around the world. The research and manufacture technology of electric buses and batteries have matured in Taiwan, resulting in an established industrial chain. The development is promising. However, obstacles, such as the lack of infrastructure, high cost to build a bus, insufficient maintenance and servicing system and lack of essential knowledge to run an electric bus operation, are blocking the way for the development of electric bus. To solve them, we worked with electric bus manufacturer and bus services with experience in electric bus operations for operation diagnosis. The diagnosis revealed that the “financial pressure from operational capitals” is the top factor making the operation of electric bus difficult. In particular, the high cost to build one has the greatest impact. Secondly, an analysis on the models of traditional leasing and charging by mileage was performed to find out the strengths of both. An innovative and practically feasible financing model was developed by combining the separation of bus and electricity and green financing. Finally, an actuarial calculation was conducted to validate the effects of the model which is likely to minimize the operation risks for bus companies.
Automatic Toll Collection System of Parking Based on Internet of Things
Authors: Sun Rong Chun , Piao Yan , Wang Yu , Wang Han
Published: December 2012

With cars increasing year by year, the problem of parking has become more and more serious. Easy, fast toll collection system is necessary in order to improve the efficiency of parking. In the paper, an automatic toll collection control system of parking was proposed. The internet of things was taken to finish the wireless communication among various devices and gateways in the parking. Ultra High Frequency (UHF) Radio Frequency Identification (RFID) reader was designed to realize the non-contact toll collection without stopping the car. The controller of the road gate handler was used to manage cars. And the parking fee can be automatically calculated according to the parking time and the card type for a driver by server. Physical simulation experiments were conducted and the experimental results show that the automatic toll collection system of parking can achieve good performance.
Study on the Reasonable Scale of the Urban Rail Transit Network: A Case of Xi'an City
Authors: Xin Xin , Wu Yao , Guo Yan Yong , Song Ti
Published: December 2012

In order to determine a reasonable scale of rail transit network in Xi'an, four influencing factors are analyzed. Based on the introduction of three indicators of rail transit network scale and the network density index, a method of rail transit network scale is proposed. Also, the determination method of parameters is given. The method is used to forecast the rail transit network scale with the actual situation of Xi'an. The result shows that the scale of Xi'an rail transit network is about 550km.
Countermeasure Analysis of the Resident Travel Characteristics in Large Scale Community in China - Taking Tiantongyuan as an Example
Authors: Yang Zi Fan , Sun Li Shan , Wang Shu Wei , Rong Jian
Published: December 2012

Along with the rapid development of China economy, more people pour into large cities since 2000. In order to settle the housing problem timely, large communities emerged in big cities of China such as Beijing, Shanghai, Guangzhou. There is usually a high population density and high proportion of commuter travel in large communities, and the traffic development of which is relatively difficult, this paper aims to solve this problem. Taking TTY district of Beijing as an example, a large scale resident trip survey was conducted. The travel indicators travel time, travel distance, etc, were detailed discussed. The main traffic problems of TTY district were summarized as: 1) separation of office and residence; 2) insufficient traffic supply; 3) unreasonable road network structure. Finally, corresponding countermeasure was proposed in the article to deal with the existing problems.
Study on Urban Tunnel CO Control Criteria Based on Human Capacity
Authors: Liu Yan , Gao Jian Ping , Tang Min
Published: December 2012

Carbon monoxide has a significant impact on human health, and a special attention should be given in the tunnel management. But the existing tunnel design standard about carbon monoxide concentration is mainly for rural highway especially for expressway, there is no urban road tunnel carbon monoxide concentration control criteria promulgated in China up to now. By analyze the character of human blood carboxy hemoglobin concentration which expose in different environment concentration of carbon monoxide according to a certain time, and take carboxyhaemoglobin that accounts for 2.0 percent in the hemoglobin as the carbon monoxide concentration control threshold for the model development to establish the basis for carbon monoxide concentration of both pedestrian and vehicle mixed tunnel and vehicle only tunnel with different lengths, put forwards the length limit of pedestrian and vehicle mixed tunnel and the recommend criteria for carbon monoxide concentration control of urban tunnels. The result of the study can has a support for urban tunnels design and management decision making especially in ventilation.