bluuebunny/crossref_metadata_2025 huggingface dataset:
The Response of PH in Substrate of Vegetation-Growing Concrete with Cement Content
Authors: Wu Bin , Xia Zhen Yao , Zhao Juan , Zhao Zi Chao , Yang Yue Shu , Xu Wen Nian
Published: August 2013

This paper study the effect of PH in substrate of vegetationgrowing concrete on cement content. Commonly using vegetation concrete substrate as the research object which often used to the growth of revetment herbal. The results showed that pH of plots substrate increased with the cement content increasing . The average PH of the control plots is higher than the vegetation plots who have the same cement content,this shows that the growth of plants have important significance to improve soil pH.
Evaluation on Sustainable Development Level - A Case Study of Liaocheng City
Authors: Liu Kai , Wang Cheng Xin , Song Shan Shan , Li Qiang
Published: August 2013

Sustainable development is a hot issue under the current background of resources and environmental crises. In this paper, Liaocheng City's sustainable development level is evaluated by using fuzzy comprehensive evaluation method. It is concluded that Liaocheng City's sustainable development level turned out to be moderate. The constraints of Liaocheng City's sustainable development are sustainable development awareness isn't formed and some problems are serious. Trains of thought include: strengthen sustainable development concept's understanding, strengthen capacity-building of improving sustainable development level and solve sustainable development practices' current problems.
Buckling Analysis of Steel Cylinder in Super Long Bored Piles Construction
Authors: Liu Yun
Published: August 2013

This study focuses on buckling analysis of steel cylinder in super long bored piles during construction. Due to special reasons, a steel sleeve is needed to be put into a 92m-long bored pile hole. On the basis of the theoretical estimation and numerical calculation of the steel cylinder, analysis model is established and the highest first pouring height is got. To ensure construction safety, casting speed can be from slow to fast and we can place level or toroidal support at appropriate placement of the steel cylinder. Moreover, test was done and the results show that the wall is in good condition, and the strength and stiffness satisfy the design requirements.
A New Steel Beam Configuration Method of Long-Term Deflection Control of Long-Span PC Beam Bridge
Authors: Xue Xing Wei , Yuan Hong , Li Shan Qing
Published: August 2013

For solving the big deflection problem which is cause by the far cantilever segment of dead load zero bending moment method, analyzing the composition process of dead load and prestress bending moment, and this paper presents the improvement of dead load zero bending moment method.The improved method adopts the prestress in principle: far segment more and close segment litter, which not only can insure the prestress bending moment bigger than dead load zero bending moment in all over the cantilever constructing stage, but also can control the deflection well. The improved method is applied to a PC continuous bridge which has a main span of 168 metres, the deflection decreases 37.4% to that of the original design.
Bridge Management Intelligence Decision Support System
Authors: Wang Juan , Qie Zhi Hong , Wu Xin Miao
Published: August 2013

In this paper a “bridge management intelligence decision support system” (BMIDSS) will be introduced. This system is based on the theory of decision support, considering the need of bridge manager and decision maker, utilizing database, model base, graphics base, knowledge base, and inference engine to realize date management, damage identification, status evaluation, fault diagnosis, remedy guidance to existing bridge.
An Experimental Study on the use of Fiber-Reinforced Concrete in Bridge Approach Slabs
Authors: Chen Yung Tsang
Published: August 2013

Fiber-reinforced concrete is well known for crack control by bridging cracks in the concrete. Short, discontinuous fibers are added into plain concrete to provide post-cracking ductility to the fiber-reinforced concrete. Although fiber-reinforced concrete has been used in various civil engineering applications, the practical application of fiber-reinforced concrete in bridge approach slabs is rarely found. In this paper, steel fibers, serving as macro-fibers, and polyvinyl alcohol fibers, serving as micro-fibers, were added to the approach slab concrete for crack control purpose. This paper describes flexural tests of four fiber-reinforced concrete beams and loading test of a full scale fiber-reinforced concrete approach slab. Results from the flexural beam test show that the addition of fibers greatly improves the fracture toughness of the concrete. Results from the loading test show that the overall performance of the slab is comparable to conventional reinforced concrete approach slabs, and the surface cracks on the slab due to negative moment can be adequately controlled by the addition of steel and polyvinyl alcohol fibers into concrete, even without top reinforcement mat.
Experimental Study on Bleed Water of Duct Grout
Authors: Zhou Yong Zheng , Zhu Er Yu , Yang Jian Min
Published: August 2013

For the problem of not complete filling the ducts with grout that frequent appearances in construction, the paper carried out the grouting compactness experiment of prestressed duct with kinds of grout materials produced by domestic manufacturers combining with different grouting techniques. The results indicated that all grout materials had bleed water. The ducts in test girder could not be completely filled. The vacuum-aided grouting technique’s grout bleed water is smaller than that of ordinary grouting technique, but still not be perfect. For this, the grout compacting device with independent intellectual property right is an effective measure.
Investigation on Closure Temperature of Long-Span Pre-Stressed Concrete Continuous Rigid-Frame Bridge
Authors: Liao Xiang Sheng , Liang Tian
Published: August 2013

Based on a long-span pre-stressed concrete continuous rigid frame bridge, the Chaoyangsi bridge, the influence on stress and deformation of the girder caused by different closure temperature was analyzed. With the aided platform Midas/Civil, comparative analysis of three different closure temperatures was carried on to determine the reasonable one. It is concluded that different closure temperature has important influence on girder stress, but the most dangerous stress combination of girder under serviceability limit state could be taken as remain the same. Though different closure temperature has little influence on the displacement of girder, it is recommended to pay highly attention to the influence on the mid-span vertical displacement when doing the formwork. And finally this article puts forward some effective measures to prevent and reduce the temperature effect.
Shear Stress Distribution and Deflection of Preflex I-Girder with Corrugated Steel Web
Authors: Chen Zhuo Yi , Huang Qiao , Yang Ming , Ma Wen Gang
Published: August 2013

A new type of preflex I-girder with corrugated steel web has been proposed to provide better solution for urban elevated bridge. The purpose of this study is to explore shear stress distribution and deflection of such preflex I-girder. Shear stress distribution in section of steel-concrete composite girder was analyzed by shearing stress integral equation and piecewise function, and a quarter-scale preflex I-girder with corrugated steel web was fabricated and tested. Experimental and analytical results show that the shear stiffness is only depends on corrugated steel web, and the shear stress is uniformly distributed along the height of corrugated web. It is found that the proposed shear stress equation is consistent with the experimental result and the deflection integral equation is agreed well with the FEA result. The result suggests that the shear deflection is as larger as 25.8% of the total deflection, and should take shearing deflection into consideration.
Transverse Analysis about Curved Continuous Rigid Frame Bridge Cantilever Concreting Construction Process
Authors: Zhao Ning , Zhu Bing , Suo Wen Jia , Du Liang , Wang Fan
Published: August 2013

Combining with specific engineering example, we used the finite element calculation software and analyzed the lateral deformation and stress of variable cross-section curved continuous rigid frame bridge during cantilever construction. Their some change rules are obtained. They accumulate during cantilever construction, and system transformation influences them greatly. We also put forward some understanding and advice about design and construction.
Influence of Closure Sequences on the Rigid Frame-Continuous Girder Bridge Closure
Authors: Yao Zhan Yong , Zhang Xiao Meng , Li Shuai , Li Lian Fu , Pan Xiang Hong , Yao Kai
Published: August 2013

Closure sequences of rigid frame-continuous girder bridge are analyzed by calculation to compare girder deflection change, pier horizontal displacement maximum, girder and pier stress value. The results show that the first side span-second side span-mid span closure sequence causes the largest girder vertical displacement and others cause almost the same vertical displacement; side piers pier top horizontal displacement is larger than middle piers whatever the closure sequence is, closure sequences could not change the stress of the girder and pier. The first side span-mid span-second side span closure sequence should be preferred.
Stability and Reinforcement of Subgrade Slope of Weathered Rock Considering the Effect of Seepage
Authors: Wang Feng Gang , Zhang Feng , Ling Xian Zhang , Li Yan
Published: August 2013

Taking the slope of K178+500-K178+550 of Beian-Heihe expressway as example, based on the steady saturated-unsaturated seepage theory and simplified the seepage force of groundwater into equivalent nodal load, then using the strength reduction finite element method to analysis the stability and potential slide area of roadbed slope which has no engineering measures; the interaction between slide-resistant pile and weathered rock can be reasonably considered by using the contact surface element, the result shows that, the safety factor of roadbed slope can be improved and the shearing strength of roadbed slope can be evenly dispersed by the reinforcement measure. The result can be used for the stability evaluation and reinforcement of subgrade slope of weathered rock area.
Study on Strain of Corrugated Steel Arch Bridge under Load in Low Embankment
Authors: Li Zhu Long , Guo Li Yuan , Wang Yan Hua
Published: August 2013

The corrugated steel structure has advantages such as stable performance, convenient installation, good durability and low cost, it has been used successfully in many projects in china and other countries. This paper had field test to study the mechanical performance of corrugated steel arch bridge under vehicle loads in low embankment. Relying on the project of Sixu Highway during Anhui period, the change law of tangential strains was got when loads were applied on different locations of traffic lane. The results indicate that tangential strain of 8/8 span is inconstant and different from other test points under loads in low embankment, we should take more consideration.
The Application of GPS in Roller Real-Time Monitoring System
Authors: Qi Yu Jie , Ummin Okumura , Zhang Tian Hang , Hong Nian Ming
Published: August 2013

A set of roller real-time detecting system is developed based on the platform of LabVIEW. In this system, GPS plays an important role of positioning the rollers track, time, speed as well as compaction times. With the friendly development environment of LabVIEW, GPS signals are collected, extracted, analyzed and processed to realizing real-time detecting. And the reliability and practicability of the detecting system program is confirmed by trail. With this great progress, a set of rollers real-time monitoring system can be easily formed, which is of great significance for scientists to further replace the traditional detecting test.
Research on Space Design in Daqing Commercial Street Based on Ecological and Livable City Construction
Authors: Xu Xiao Li , Su Fang , Liang Jing , Xue Ting
Published: August 2013

Requirements of Daqing ecological and livable city construction were analyzed. The problems of space design in Daqing commercial street including energy-saving, spatial scales, transportation planning, and environmental facilities were analyzed. Space design measures including humane care, high efficiency and low energy-saving, regional expression and diversity space are proposed.
Longitudinal Cracking Reasons and Prevention of Widened Pavements of Old Roads
Authors: Zhu Xiao Bin , Shen Jun Min , Xiao Zhang
Published: August 2013

This paper focuses on the construction quality control of broadened roadbeds and all structure layers of pavements, proposes construction control methods and corresponding treatment measures, combining the design features and the main points of construction of some provincial roads project, aiming at the asphalt pavement longitudinal cracking in highway reconstruction.
Evaluation of Moisture Susceptibility for Asphalt Mixtures
Authors: Zhuang Chuan Yi , Ye Ya Li , Zhou Yan
Published: August 2013

Types of asphalt mixture with different gradations and air voids were designed. Tests on their indirect tensile strength, compressive strength and resilient modulus of compression under single axle compressing were taken to study the effects of two forms of water immersion (hot water immersion and freeze-thaw split test) on asphalt mixtures mechanical performance and high temperature stability. Test results point out that water immersion decreased asphalt mixtures performance seriously and the effect of freeze-thaw split tests on asphalt mixtures performance is far stronger than that of hot water immersion. Asphalt mixtures performance is related with its gradation and percent air voids. Asphalt mixtures with different gradation are different in their percent air voids, suitable gradation can form framework and filling action obviously, so to yield mixture with suitable percent air voids and good water stability.
Forecasting of Highway Ecological Environment Evolution Based on Time Series Analysis
Authors: Wu Guo Xiong , Li Qing Jie , Cheng Gao Yun
Published: August 2013

A roads ecological environmental quality index data for years is a time-series, and accurate prediction by exploring the changing rule of the time series is significant for future environmental protection. For this end, based on time series analysis, this paper firstly carries out steady analysis and random test pretreatment for the eco-environment quality index (EQI) data collected. Next, an ARMA model is established by pattern recognition, established bands and parameter estimation, and then verified by the data collected in recent years. Finally, the ARMA model is used to predict the future EQI values. This research will provide effective guidance to the eco-environmental protection along the road.
Characteristics of the Highway Architecture Design
Authors: Li Zhu Long , Huo Ming , Wang Yan Hua
Published: August 2013

The traditional highway development even pays more attention to the technique index of the highway, emphasizing the service ability and the service quantities and to for national economy. Usually emphasized" technique" factor for the highway but neglected the peoples request of environmental protection, cultural, region, art and other comprehensive factor. This paper put forward the concept, contents and characteristics for the highway architecture and the highway architecture design, to leads into the public building design theories and methods, and to modify the idea of design and construction for highway. The highway architecture is to study the highway buildings structure, function, environments and pepoles activity etc. certainly also includes two aspects of technique and art. The highway architecture design is the space design for highway buldings to satisfy various basic functions of highway and moderates the foundation of various factors, such as the highway buildings and environment etc.
The Preparation Technology and Performance Study of SBS and Rubber Powder Composite Modified Asphalt
Authors: Liu Li , Liu Zhao Hui , Li Sheng
Published: August 2013

Taking SBS and rubber powder as modifier, adopting the dosage of 4%, 5%, and 6% of SBS while 2%, 4%, 6% of rubber powder to prepare composite modified asphalt, studied the preparation technology of composite modified asphalt, analyzed the trend of ductility, penetration, softening point and elastic recovery. The results show a certain SBS dosage, with the increase of the rubber powder, ductility decrease while softening point and elastic recovery increase, penetration decrease first and then rise. It can provide reference for the preparation technology and performance study of composite modified asphalt.
Comparison of Test Methods for High-Temperature Performance of Asphalt Mixtures
Authors: Wu Guo Xiong , Zhang Xiao Ke , Wang Rui Lin
Published: August 2013

Through a comparative study of high-temperature asphalt mixture performance by three methods: the standard rutting test, uniaxial penetration test on cylindrical specimens, and slant shear test, this paper displays that the shear elastic modulus gained by both cylindrical uniaxial penetration test and slant shear test can reflect well the properties of shear deformation of asphalt mixture under high temperature. However, there are certain limitations in these test methods.
Laboratory Research of Optimum Fiber Content in SMA Mixture Based on High Temperature Performance
Authors: Cheng Ying Wei
Published: August 2013

At present designers take little account of the different requirements of pavement performance when determining the adding ratio of lignin fibers in Chinese SMA mixture. Basing on the high temperature performance the article studied the optimum fiber content of SMA-13 mixture through comparative tests of performance. First aiming at SMA-13 mixture with different fiber contents, the mix proportions were designed and asphalt contents were verified. Then the effect of fiber content on high temperature performance was indicated through three kinds of interrelated performance tests. At last other pavement performances of SMA-13 mixture were verified. Based on the test results, an optimum fiber content of 0.33% is recommended for the lignin fibers used in this SMA-13 mixture, with which mixture poses the best high temperature performance.
Stability Evaluation of Highway Near Mined-Out Region
Authors: Zhang Dan , Shen Nai Qi , Li Xu , Shu Zong Yun , Xu Xiao Le
Published: August 2013

The stability evaluation of highway near a goaf is a key problem in highway construction projects. The goal of this research is to analyze the surface deformation of the highway No.108 in Baoshui area. Both Probability Integral Method (PIM) and Finite Difference Method (FDM) are used and compared to deal with this problem. The main aspects of this research consist of surface subsidence calculation and prediction of surface residual deformation. The results calculated by probability integral method and finite difference method are mainly in agreement,and they are in accord with surface deformation observation results of some sections. So these two kinds of method are proven to be effective in dealing this problem. Moreover, the surface residual deformation was predicted by using numerical simulation based on FLAC3D. To ensure the highway No.108 security, backfill grouting should be carried out in the areas where collapse pits and ground fissure are found near the highway.
Cold-Recycled Base Material Fatigue Life Reliability Analysis
Authors: Zhang Hai , Yan Shi , Jiao Li , Wang Lin
Published: August 2013

Based on Weibull distribution, the function of coldrecycled base material fatigue life reliability is deduced. The basic parameter of reliability function is determined according to colrecycled material fatigue test results. The coldrecycled base material fatigue life reliability under the function of standard axial load is acquired with relevant calculation formula of asphalt pavement design specifications, and the fatigue life reliability of test road is estimated. The results show that the pure coldrecycled material is suitable for pavement structure of light traffic only, and the equation of fatigue life reliability is applicable and feasible.
The Relationship between the Asphalt Indoor Aging Experiment and Actual Using Period
Authors: Liu Zhong Gen , Xia Chun Yang , Liu Xiao Hong
Published: August 2013

This paper indoors for a sample of No90 asphalt has finished the asphalt aging, penetration, viscosity test at different temperature and time, comparing the indoor test results with the indexes of asphalt road actual use, the indoor test result and actual use aging relationship in all life-span service, to provide a reference method for the evaluation of asphalt anti-aging properties and selection of asphalt.
Methods for Reducing Energy Consumption and Carbon Emission in Asphalt Pavement Construction
Authors: Ding Zhi Yong , Yang Yi Xiao
Published: August 2013

In the construction process of asphalt pavement, mixing is the process which brings most of carbon emission. There is huge potential advancement of energy conservation, emission reduction and consumption reduction in the construction of asphalt pavement. Research on the structure improvement of construction equipment, the optimizing of the construction technological process and the influence of mixture performance and parameters is necessary. It is feasible to conduct interdisciplinary research in the condition that construction quality is ensured. There needs excellent control technology on efficient paving, efficient compaction and appropriate equipment match and temperature segregation of mixture. By doing this, the purpose of energy conservation and emission reduction in the construction process of hot-mix asphalt mixture can be achieved.
The Study on Flame Retardant Asphalt and Asphalt Mixture
Authors: Tao Peng
Published: August 2013

Elaborated commonly used asphalt Classification and characteristics of flame retardants and flame retardant mechanism. In view of the present situation of the application of flame retardant asphalt, this paper puts forward the problems existing in the current research and development direction. By comparing the type flame retardant, flame retardant fibers and other mineral powder, fiber flame retardant effect, summarizes their advantages and limitations.
Grey Correlation Analysis Method to Analyze the Influence Factors of Attenuated Performance of Asphalt Mixture under Water-Temperature-Radiation Cycle Action
Authors: Cheng Yong Chun , Zhang Peng , Jiao Yu Bo , Tao Jing Lin , Wang Ye Dan
Published: August 2013

In order to accurately simulate the combined action of rainfall, high temperature and sunshine effect on asphalt mixture, the experiment of water-temperature-radiation circulation was designed. The changes of air void, split tensile strength, freeze-thaw splitting tensile strength and dynamic stability were quantitatively analyzed under the condition of different asphalt-aggregate ratio and different striking times during water-temperature-radiation cycle. Grey correlation analysis method was used to analyze the influence factors of the four parameters mentioned above, and comprehensive correlation was put forward to evaluate the influence factors of mechanical properties of asphalt mixture. It is proven that, the cycle index of water-temperature-radiation is the main factor. The striking times and asphalt-aggregate ratio influence mechanical properties of asphalt mixture less than the cycle index, and the initial void influences least.
Lane Change Decision Analysis Based on Drivers' Perception-Judgment and Game Theory
Authors: Peng Jin Shuan , Guo Ying Shi , Shao Yi Ming
Published: August 2013

To clearly understand the mechanism of drivers lane-changing decision, based on drivers perception of external information, integrated cognitive judgment and game theory, the decision-making model was established, then the structure and operating mechanism of the model were detailedly analyzed. By introducing game theory-related knowledge, the non-cooperative mixed strategy game between the object vehicle and the following vehicle in the target lane was further discussed. Then, the benefits and Nash equilibrium solution of the participants in the game were deeply researched. Analysis shows that lane-changing decision is composed of information perception and three judgment-decision processes, the factors which would affect decision-making level include information source characteristics, the ability of drivers perception and comprehensive cognitive judgment, driving behavior characteristics and so on. The Nash equilibrium solution of the lane change game is determined by driving safety level, journey time and importance degree of the revenues.
Research on Bus Crew Rostering Problem Based on Minimum Cost
Authors: Hao Na , Song Rui , Zheng Li , Zhang Ying
Published: August 2013

A feasible, reasonable and fair crew rostering plan is more meaningful for mobilizing the enthusiasm of company crews and improving operation efficiency to promote the sustainable development of urban transit. The basic concepts of the rostering problem are analyzed firstly. Considering one single day off to be interspersed between a planning period of six days, the problem can be divided into two stages. On the first stage, optimization shifts will be carried out by every crew during the planning period without considering the days off. On the second stage, additional crews can substitute for original crews when they are in rest. Then two mathematical models based on crew scheduling problem are established, which are aimed at minimizing cost. Finally, one route is taken as an example and the optimization software LINGO is proposed to solve the model. The result of the test is analyzed in detail, which indicates the practicability of the model.
Comparative Simulation Analysis of Urban Arterial and Auxiliary Roads Connection Type
Authors: Jiao Qian Nan , Wang Jian Jun , Han Ya Hui
Published: August 2013

This paper use the different connection type of arterial roads and auxiliary road as the study subject, make the comparative analysis of traffic flow, traffic speed, distance of the import and export and ratio of weaving traffic flow in weaving area, then use the micro-simulation tool VISSIM to analysis the traffic volume and travel time of different connection type and offer related suggestions for their respective adaptability.
Implementation of Crime Prevention through Environmental Design by Kuala Lumpur City Hall
Authors: Shamsuddin Shuhana , Hussin Natasha Azim
Published: August 2013

Crime Prevention through Environmental Design (CPTED) is a ways to prevent crime from happen by manipulating the built environment through effective design. The research aims to investigate the level of CPTED implementation by the Kuala Lumpur City Hall (KLCH). The Safe City Program that was introduced in 2004 by the Malaysian Government and CPTED is partially one of the strategies that have been adopted in the program. The issues investigated are the worsening of urban crime rate as reflected in the crime index that rose significantly from year 1980 to the year 2007. Rising of crime index for past six years in Kuala Lumpur is questionable whether CPTED has been successfully carried out by the KLCH. The study was conducted among the professionals and technical staffs that are the so called implementers of KLCH as they are the core person in implementing CPTED.
Study on Connection of Rail Transit and Bicycle Traffic - A Case Study of Xi’an Metro Line2
Authors: Chen Wan , Chen Kuan Min
Published: August 2013

The development of rail transit made travel convenient for urban residents, alleviated traffic pressure, but the long travel distance of the site and the surrounding areas affecting rail transit service level. In order to full play the rail transit large capacity, improve the appeal of the public transit, solve the problem of "last one kilometer", This paper summarized the importance of connection of rail transit and bicycle traffic with a case of xi 'an metro line 2, discussed the forecasting methods of rail transit and bicycle traffic transfer demand, then used vertical and horizontal analogy prediction method to predict the transfer demand at the Zhonglou station and Xiaozhai station in Xian metro, finally the transfer mode of rail transit and bicycle traffic transfer are proposed. This paper has certain reference value for study of rail transit and bicycle traffic.
Study on the Adaptability of the Level of Urban Transportation Infrastructure and Economic Development
Authors: Ma Juan , Zhao Yu
Published: August 2013

The development of transportation infrastructure construction is playing an important role in promoting the development of economy. We aimed at the adaptability between transportation infrastructure construction and economic development, and established an evaluating indicator set between urban transportation infrastructure construction and economic development. Meanwhile, on the base of the thought of system evolution, we constructed the evaluation model between the two, and quoted the related date of Xinjiang from 2000 to 2011 in empirical analysis, so that it is able to provide the useful reference to the healthy and rapid development of economy in a degree.
Comprehensive Evaluation on Sustainable Development of the Trunk Road Network Based on Fuzzy AHP
Authors: Zhang Su Li , Ma Rong Guo , Mo Xiao Hua , Fang Li Liang
Published: August 2013

According to the characteristics of highway network for sustainable development and make clear the purpose and content of evaluation. On the basis of that this paper from network capacity, network traffic environmental carrying capacity, social benefit continuity and management system and policy this four aspects to set up the evaluation index system for the degree of highway network sustainable development, and illustrate the quantitative method of the attribute value of quantitative and qualitative indicators. This paper put forward the comprehensive evaluation method which is based on the Fuzzy AHP. Finally take the trunk road network of Zhang Jiakou city for instance to study.
Study on the Development Mode of Integrated Passenger Transport in City
Authors: Li Cheng Bing , Chen Wei Dong , Jia Hua Fei
Published: August 2013

With the acceleration of the process of urbanization and motorization, the traditional development mode of passenger transport can not meet the requirements of the present era. Firstly, after the brief introduction of the characteristics of traditional passenger transport mode, the connotation of urban passenger transport in the background of the integration is put forward; secondly, the development trend of integration research of urban passenger transport is expounded; afterwards, the influence factors of constructing integrated development mode of passenger transport in city are analyzed; finally, the research object of this topic is set up, namely the integrated development mode of passenger transport in city, having very important and practical significance to guide urban benign development, integrate urban transportation resources and optimize the urban space layout and so on.
Study on Travel Optimization Scheme between Inter-Cities Based on Comprehensive Consideration
Authors: Fu Xiao Feng , Sun Pei Hua , Wang Hui Ling
Published: August 2013

Breakthrough one-sidedness of previous studies, considering the influence of intercity passenger travel, established optimization model of travel scheme selection based on multi-objective comprehensive consideration, and verified its practicality and popularization value by the example.
Microscopic Driving Parameters-Based Energy Consumption Rate Comparison between Electric Vehicle and Gasoline Vehicle
Authors: Yao En Jian , Lang Zhi Feng , Song Yuan Yuan , Yang Yang
Published: August 2013

Based on the emission and electricity consumption data collected by a light-duty electric vehicle (EV) and a light-duty gasoline vehicle (GV), a set of electricity consumption rate models and gasoline consumption rate models are established with instantaneous speed and acceleration as input parameters of these models contain while the outputs are electricity & gasoline consumption rates. then, the gasoline & electricity consumption rate models are transformed into standard coal consumption rate models based on the conversion formula of standard coal, respectively. Finally, comparisons about standard coal consumption rates are made between EV and GV under different operation modes. The results show that EV has an obvious advantage over GV in energy consumption reduction.
Estimating the Cruising Range of Electric Vehicle Based on Instantaneous Speed and Acceleration
Authors: Yao En Jian , Wang Mei Ying , Song Yuan Yuan , Zuo Ting
Published: August 2013

In contrast to fuel vehicles, the wide-spread use of electric vehicles (EVs) is still hindered by limited battery capacity and cruising range. It is important to forecast the EVs cruising range accurately before departure and reduce the risk of running out of electricity before arriving at the destination or charging station. In this article, through analyzing the variation characteristics of energy consumption rate with instantaneous speed and acceleration, a series of EV energy consumption rate models are established according to different operation modes. Further, a novel cruising range estimation method is proposed based on the presented EV energy consumption rate models, which is characterized by fully considering the impacts of instantaneous speed and acceleration. Finally, using the simulation data of a road in Beijing, the model presented in this article is utilized in conjunction with microscopic traffic simulation technologies to demonstrate its application in estimating the EVs cruising range under different traffic volumes.
Improved Floyd Route Mending Algorithm Based on Dynamic Travel Time Applied to the Estimation of Floating Car Origin-Destination Data
Authors: Zhao Hui
Published: August 2013

The floating car data (FCD) is widely used to estimate the time-varying OD demands in recent years. The one of the most important factors influencing the application performance of FCD is the completeness of FCD route data. This paper is intended to develop Floyd route mending algorithm based on dynamic travel time for FCD. In this framework, the raw FCD and the processed FCD are used to identify the problem of data missing based on topological structure of the road network. Then, an approach is developed to mend route based on improved Floyd route mending algorithm based on the GIS map. The approach is designed in a way that takes full advantage of the dynamic characteristics of travel time and quick routes scan. The paper applies the proposed methodology to mend routes and derive OD demands of FCD for the Western 3rd Ring-Road corridor network in Beijing, China. It is shown from the statistical analysis that the approach is accurate and the OD demands of FCD can reflect the characteristics of OD demands of all vehicles in the road network.
Research on the Energy Efficiency Evaluation System for Surface Water Source Heat Pump System in Northeast Cold Region of China
Authors: Yu Liang , Sun Meng Yun , Feng Guo Hui , Gao Wei
Published: August 2013

As the rapid development of urbanization in China, the conservation of building energy has become a world trend, the rapid rise of building energy will lead a huge pressure on energy supply and environment protection. Renewable energy sources, like solar and geothermal energy, have the incomparable superiority than conventional energy sources, if renewable energy sources could replace conventional energy source and play a major role fully, the serious energy consumption must be relieved effectively. In this thesis, the summer-refrigeration of SWHP (Surface Water Heat Pump) is set as the research target, the applicability research of SWHP is carried out, apart from that, building the evaluation system and putting forward the level determination method of energy efficiency.
The Analysis of Transfer Information Demands of Public Transports
Authors: Chen Kuan Min , Chen Wan
Published: August 2013

In order to interact and share the information of public transports, shorten the transfer time, especially for metro and bus. Based on the view of the passengers, this paper made a survey of information demands of passengers at Xiaozhai station of line 2 in Xian metro. According to the analysis of the survey obtained the most important transfer information of metro and bus. Finally, the content and method of information release be sorted out. This paper aimed at provide theoretical basis for the further research of mutual transfer of public transportation.
Vehicle Detection and Counting in Traffic Video Based on OpenCV
Authors: Wang Wen Jun , Gao Meng
Published: August 2013

With the development of modern social economy, the number of vehicles in China is growing rapidly, so how to get real-time traffic parameters has a very important significance in using the limited road space, vehicle video detection method based on image processing develop rapidly. With the improvement of image processing technology and microprocessor performance, makes video-based traffic parameter detection using universal. This paper deals with the real-time traffic video, gets each frame, uses Gaussian filter denoising, marks the region of interest (ROI), apply background subtraction algorithm based on average method, get the binarization foreground image, set threshold to eliminate the moving objects whose area is too small, check the boundary of ROI to judge the moving vehicle and counting, get the results as parameters of the intelligent transportation.
Energy Efficient Measures for Buildings with Grid-Connected Photovoltaic Systems Located in Bangkok, Thailand
Authors: Yimprayoon Chanikarn
Published: August 2013

Grid-connected photovoltaic (PV) system efficiency can be maximized with building demand matching. Computer simulations were used to investigate the priorities of energy efficient measures commonly used in residential and commercial buildings in Thailand that decreased the electricity demand while producing load profiles that matched the unique output profiles from PV systems. Residential and commercial buildings in Thailand were modeled in existing conditions. Then they were made compliant with ASHRAE energy standard requirements which can reduce electricity consumption 16-36% in residential buildings and 8-19% in commercial buildings. With energy efficient design measures, electricity production from PV systems could satisfy the remaining consumption and peak electricity demand reduction could reach up to 70% in residential buildings. Electricity consumption and peak demand reduction in commercial buildings was not high. Reducing lighting power density in residential buildings, using higher glazing efficiency in small offices and using thermal mass in big offices were found to be able to reduce more peak load when electricity output from PV systems were incorporated in the buildings compared with other measures. Energy efficient design measures suitable for different purposes in each building type have been identified. Building owners and electricity utilities can use this information to select the best energy efficient design measures that fit their objectives.
Applying Fuzzy Set Theory to Analysis Driving Maneuver
Authors: Zhou Yong , Tian Ling
Published: August 2013

The conventional statistical models have their limitations in modeling the natural human driving behavior. This may be overcome by applying fuzzy set based approach to describe drivers decisions. This paper proposes a fuzzy set based car-following model to simulate the driving maneuver. Emphasis is placed on the research undertaken to establish fuzzy sets and systems and model validation. Research results have shown that the fuzzy set application is very encouraging.
Study on Control Design of Interchange Entrance Congestion Zone
Authors: Wang Xian Guang , Sun Xiao Nian
Published: August 2013

Interchange entrance area is the key point which affects the overall operational reliability of an Interchange. In order to alleviate the crowded ramp merging area, improve the overall reliability of the interchange and improve traffic safety, when traffic demand increases to a certain extent, traffic control strategies should be used. According of the characteristics of the interchange ramp entrance area, the control strategy of interchange and the mainline which affect the reliability of high-speed road network most has been researched. Analyzing the geometric and traffic characteristics of the ramp merging area, different control strategies on the ramp and the mainline are proposed, that is ramp access control strategy and the main line lane running constraint strategy.
The Investigation of Ground Traffic Vibration Source Characteristics of Beijing Zhengyang Men Area Based on Traffic Investigation
Authors: Song Qi , Guo Jia Qi , Chen Wen Hua
Published: August 2013

Zhengyang Men which is located on the north-south axis line of Beijing, is surrounded by the vital communication lines, and suffered from the environmental vibration induced by the busy ground traffic. In order to study the dynamic response of Zhengyang Men city gate and arrow tower, which is caused by ground traffic, the vibration characteristic of ground traffic is the basic research content. The motion equation, which is established by means of the vehicle dynamic model, and the ground traffic characteristic, which is summarized based on the traffic site investigation, are used to derive the vibration source form of a single type vehicle, further more the form of different type vehicle. And then the vibration source can be used for studying the dynamic response of city gate and arrow tower.
Time Distribution and Analysis of Traffic Accident Fatalities
Authors: Qu Lv Wen , Dai Mei Wei , Wang Fu Jian , Zeng Zhi Yuan
Published: August 2013

According to hourly statistical data of road traffic accidents death toll during 1999~2004 of Zhejiang province, we found the death toll concentration phenomenon which is called phenomenon of 17 to 20 o'clock. And we discussed causes of high incidence of traffic accidents during 17 to 20 o'clock and put forward the corresponding countermeasures to reduce traffic accidents, according to the distribution pattern of deaths gender, age, travel purpose during these hours. The results of this research provide the foundation for reinforcing the traffic safety education and management.
Research on Energy Consumption Quota for Public Buildings in Hebei Province
Authors: Liu Shi Long , Xu Yue Qun , Ju De Sheng
Published: August 2013

Based on 107 data of public building energy auditing and energy consumption statistics, using multiple linear regression method, this paper given an equation for calculating energy public building consumption quota. It can get energy consumption quota simply and conveniently. The equation was close to actual energy consumption of public buildings. It consider building area, heating degree day (HDD) and building type. The results can be help the government formulate the energy consumption quota for public buildings.
The Research for the Aging Performance of Reflective Sheeting by Artificial Accelerated Method
Authors: Ma Xue Feng , Su Wen Ying , Li Dan , Wang Wei
Published: August 2013

This paper researches the weathering performance of traffic sign reflective sheeting by artificial accelerated weathering test method. The microstructure image and the retro-reflective coefficient of reflective sheeting were obtained and discussed according to the test result. This paper summarized the aging regular.
Operative Methods for Traffic Organization during Multiple Projects
Authors: Yao Fei , Zhu Shun Ying , Liu Qing Yuan , Wu Yu , Wu Jun Di
Published: August 2013

Multiple urban projects constructed at same time block many roads, which increases the difficulty for traffic organization. Considering the characteristics of multiple projects, took construction method, construction procedure, land development, traffic environment and traffic flow into account, this paper proposes a workflow for traffic organization, recommends building temporary road and reconstructing branch road to undertake all the traffic from blocked roads. Selecting Jiangcheng Avenue complex project as a case, four methods were put forward for keeping traffic uninterrupted during construction with different temporary road route designs and traffic management measures.
Exploration on Speed-Limit Signs of Traffic Accident Section on Freeways
Authors: Wu Qiong , Wang Jian Jun
Published: August 2013

In order to improve freeways traffic safety, reduce staff and vehicles casualties and prevent secondary traffic accidents, the accident site section on freeway is divided into six regions of the warning zone, the upstream transition zone, the buffer zone, the accident zone, the downstream transition zone and the termination zone. Establish the warning zone speed-limit model by considering the relevant factors of driver's field of vision and transportation distance of visual cognition and then speed-limit programs are proposed according to the warning area speed-limit model. Speed-limit signs of the warning zone take phased settings based on both of those. The results show that the proposed warning area speed limit model conforms to the actual need, decision science, and having important practical value for freeway traffic safety.
Establishing the Residential Building Energy Saving Comprehensive Evaluation Index System of Baotou
Authors: Jin Guo Hui , Wang Huai Zhu
Published: August 2013

Combined with the natural climate and geographical location feature of Baotou chosen refining indicators, this paper built the Residential building energy saving comprehensive evaluation index system referring to the standard of residential building energy efficiency design, and that proceeding from design constructing and operating stage of constructions.
The Application of Piezoelectric Energy Harvesting Technology in Intelligent Building
Authors: Guan Bin
Published: August 2013

The power supply of large number of sensors in the Internet of Things is the bottleneck technology of intelligent building. Piezoelectric energy harvesting is introduced as it is a perfect way to solve the problem. The vibration energies in intelligent building are analyzed and concluded with two important common characters. The five difficulties for the application of piezoelectric energy harvesting technology in intelligent building are introduced and solved. The module topology of energy harvester for sensor net in intelligent building application is presented.
Recent Advances in Experimental and Numerical Study on Thermal Conductivity of the Composite Wall
Authors: Zhu Jing Jing , Zhang Hui Hua
Published: August 2013

With the rapid development of human society, the construction industry is booming. How to reduce the building's impact on the environment has become a common problem of the concerns of the community. In recent years, the green building is growing up. As a key part of green building, the composite wall insulation system has attracted the attention of many researchers. This paper presents some recent advances in the experimental and numerical analysis of the thermal conductivity of composite wall, and is expected to serve as a reference for future research and development of green building.
Application Potential of Solar-Shading in Tropical Island Cities
Authors: Li Xiao Ping , Yin Bo , Yang Cai Xia , Zhou Hai Zhu
Published: August 2013

The electricity demands of the buildings in tropical island cities for cooling present an increasing trend with the augment of the ratio of widow to wall and improvement in the quality of life. The shortage of shading is considered to be one primary reason for the higher energy consumption in buildings. This paper investigated the application potential of shading in several cities of Hainan province using DOE-2 software. It is found that the radiation heat gains of the west window may be slightly higher than other orientations, while the energy conserved by shading will be twice of others. Meanwhile, flexible shading is suggested for cities where sun-shine is favorable in the winter.