bluuebunny/crossref_metadata_2025 huggingface dataset:
Research for Framework of BIM-Based Platform on Facility Maintenance Management on the Operating Stage in Metro Station
Authors: Xie X.Y. , Xie T.C.
Published: March 2015

Facility management in metro station is an important content of the operation stage, relates to people's daily travel safety, and needs to be more efficient and reliable. At present, the research and application of BIM in the design and construction stage has made great progress in the domestic, but the research of BIM in operation stage is still in the exploratory stage. Through the investigation, this study analyzed the demand of the facility management in metro station, proposed data requirements to build operation model of a metro station, established a framework of BIM-based platform on facility maintenance management in metro station, and expected to provide a more efficient and reliable digital means for facility management in metro station. The results of this study were applied in a metro station in Shanghai, and obtained the ideal effect.
Kinematic Error Analysis of Parallel Machine Tool Based on Rigid Body Dynamics
Authors: Chen Xiao Gang , Xu Zhao Tang , Wu Hai Bing
Published: March 2015

To estimate influence of velocity on kinematic accuracy for a cross-linked Stewart type Parallel Machine Tool, position and orientation errors of the moving tool platform are researched. Based on rigid body dynamics, inertial and friction forces and moments are considered. Firstly, analytical expression of driving force is derived for each link. Secondly, change of length is derived using Hooke’s Law for each link. Then mapping matrix between change of link length and change of platform position and orientation is derived based on both Euler angle and revolving angle around a spatial axis. Finally, analytical expression of position and orientation errors of the moving platform is derived. Figures of distribution of position and orientation errors in workspace under two velocities are obtained respectively. The results show that, in frequently used workspace, all of the three components of position error are less than 3.5μm. All of them increase with z coordinate of platform center. Position error is influenced slightly by velocity. The difference of position error between two velocities is less than 2%.
Intelligent Traffic System Design Research of Urban Complex Underground Garage
Authors: Xu Meng , Pan Xiao Dong , Sun Long Xi , Yan Gang , Chen Feng
Published: March 2015

Reasonable traffic system design and management has vital significance to ensure the safe and smooth traffic operation of urban complex and urban traffic system. Based on the characteristics of urban complex, this paper analyzed intelligent traffic system design of underground garage of urban complex. The paper proposed a reasonable traffic system design method to ensure the smoothness and safety of urban complex traffic. Meanwhile the full-video intelligent parking garage management system with advantages of safe and advanced technology was adopted to realize user-friendly, intelligent and automation traffic management. Through intelligent traffic system design research of urban complex underground garage proposed in this paper, the operation efficiency of the underground garage was improved and the parking function and evacuation capacity of underground garage was brought into full play.
The Research of MDAS System Based on Intelligent Pipeline
Authors: Zhang J.Q. , Wu P. , Kan S.L. , Yu T.
Published: March 2015

In the mobile internet era, the mobile data operation has been critical to operators for enhancing their value, and how to effectively improve mobile data management becomes one of the operators’ research focus. Under the background, it puts forward the theory of intelligent pipeline in this paper, then describing the definition of intelligent pipe, and its characteristics, such as perception, recognition and dynamic. Finally the mobile data analysis support system (Called MDAS) is built on the basis of the intelligent pipeline, and the function structure of MDAS is given.
Context Awareness on Mobile Devices
Authors: Pan Z.A. , Zhu J.X.
Published: March 2015

Context aware computing is important for applications to provide smarter and safer
service to mobile users, especially when users’ context changing rapidly or regularly. In this paper,
we propose a context aware model for mobile devices based on audio and location. The information
can easily obtained from sensors, e.g., microphones and GPS. Thus, exploiting the MFCC features
and the location, a Bayes Net is trained and built and will be used for context classifying in the
real-time classification. The results of experiments implemented on Android 4.0 platform
demonstrate promising performance, which indicates that the model is able to support real
applications.
Hexangular In-Phase Coherently Coupled Arrays of Vertical Cavity Surface-Emitting Lasers Based on Proton Implantation
Authors: Wang J. , Xu C. , Xun M. , Liu J.
Published: March 2015

Hexangular in-phase coherently coupled arrays of vertical cavity surface-emitting lasers (VCSELs) were fabricated using proton implantation. The arrays show excellent beam quality with far-field divergence of 4.8° and the output power of 3mW under continuous-wave condition. Different global flower-shaped patterns appeared with the varied injection currents.
The Simulation of Strong Electromagnetic Field Experimental Environment around On-Line Monitoring System for UHV Transmission Tower
Authors: Hu S.R. , Yang X.F. , Gu L. , She L.
Published: March 2015

Real-time on-line monitoring system for UHV transmission tower is located in strong electromagnetic interference environment, especially when the transmission tower encounters thunderstorm weather, lightning current can produce the stronger electromagnetic field near the power transmission tower, so the bad environment generated by strong electromagnetic interference determines the difficulty of analysis of strong electromagnetic field distribution, therefore, this design chooses to simulate strong electromagnetic field environment around the online monitoring system of UHV transmission tower in the laboratory, carries on the analysis, then summarizes its impact on the monitoring system of the wireless channel and puts forward protective measures.
Deflection Sensors Fault Time Locating Based on Kalman Filtering and Data Fusion
Authors: Hu S.R. , Zhang J.K. , Liang K. , Bao M.
Published: March 2015

Traditional research on sensor fault are usually confined to fault space locating, however, it’s very necessary to determine the time that the fault occurrence for subsequent data processing and to guarantee the normal operation of the monitoring system. Therefore, this paper proposes a method of sensors fault time locating. First of all, use Kalman filter to process the sensor data, then define the support level of sliding window correlation to sample correlation, combining with multi sensors data fusion, so as to identify the accurate time point of fault. Combine the deflection sensors data from Caiyuanba bridge, simulating four common faults. The results show that the error of located time is less than the width of the sliding window.
Calibration a Magnetometer Based on Multiple Population Genetic Algorithm
Authors: Pang Xue Liang , Lin C.S.
Published: March 2015

It is imperative that the magnetometer is properly calibrated for sensor errors caused by the bias, scaling factors and non-orthogonality. It is difficult for the three-axis magnetometer to be used directly to measure the magnetic field magnitude. In this paper, we present a method based on Multiple Genetic Algorithm that can be used to estimate calibration model parameters. The Genetic Algorithm put the parameters of the calibration model as the evolutionary population; According to the fitness, the poor individual is eliminated step by step and the optimal individual is obtained after crossing and mutation; The optimal parameter estimation corresponding to optimal individuals is achieved. In the practical application of Genetic Algorithm to estimate parameters of calibration model, premature situation is fond. To avoid this situation, Multiple Genetic Algorithm is used to solve this problem. It is effective for Multiple Genetic Algorithm to estimate parameters of calibration model overcoming the premature. The simulation and experiment show that the method based on Multiple Genetic Algorithm can converge steadily and can achieve high estimation precision.
A New Ray Tracing Method Based on Linear Travel-Time Interpolation
Authors: Liu L.J. , Xie Z.H. , Yang C.
Published: March 2015

In the application of industrial flaw detection, the materials to be detected are often a collection of a background area and a small amount of defect areas. In traditional linear travel-time interpolation (LTI) method, the assumption of travel-time linearity will lead to error accumulation when the rays go through multiple cells. In order to reduce the cumulative error in this application, a new ray tracing method is proposed based on linear travel-time interpolation. In our method, calculation points are located on the boundaries between different areas to determine the angle of refraction. Moreover, the minimum travel-time of each point is computed by multidirectional loop strategy, which will make the traced ray path conforms to the condition of minimum travel-time when ray transports from the reverse direction. The simulation results show that using the proposed method to calculate travel-times and paths of tracing rays, it is more rapid and accurate than traditional LTI method and cross-scanning LTI method.
Design and Implementation of Netted Radar Training Simulator
Authors: Yin J.G. , Zhang Cong , Li Dan , An Yang , Zhu F.Q.
Published: March 2015

With the rapid development of information technology and deeply evolution of air-to-ground combat mode, the combat between air targets and netted radar will be an important component of future warfare. Design and development of netted radar training system is historically inevitable. This paper aims to design and develop networking radar training simulator system. We have studied and designed the system structure and function. With deeply analysis of the key model of the system, the training simulator was implemented by object-oriented technology. This paper mainly introduces the overall design of netted radar training simulator and the simulation method to realize the key models.
Analysis to the Depth of Subgrade Workspace of the Heavy-Loaded Traffic Main Road in Shanghai
Authors: Wen X.J. , Bai Y.F.
Published: March 2015

The current subgrade workspace of the Shanghai heavy-loaded traffic main roads has varying degrees of disease problems. This paper chooses the typical structure of asphalt concrete as a pavement model, aiming to calculate the stress of subgrade by using BASAR3.0 program, and analyze subgrade workspace depth under heavy axle load. Elastic layered system theory is used to calculate the depth of the roadbed work area under different conditions and typical road structure. Result shows that under the condition of heavy-loaded traffic, it is insufficient for the subgrade workspace with the depth of 0-80cm. In order to ensure steady support the pavement structure, and avoid its serious distortion, the depth of subgrade workspace should be adjusted. It has a certain reference value for the prevention and treatment of diseases of heavy-loaded traffic road.
A Study on the Influence of Sun Gear Misalignment on Planet Load Sharing and Lifetime of Planetary Gear Using MSC.ADAMS
Authors: Kang Kyung Min , Mou Peng , Xiang D. , Shen Gang
Published: March 2015

Misalignment on sun gear in planetary gear is easily occurred and it usually causes serious problem of work efficiency and lifetime with the change of planet load sharing. For study on the influence of sun gear misalignment on load sharing, multibody dynamics simulation is employed in this paper. First of all, 3D geometry model of planetary gear is built by Solidworks. Based on 3D model, multi-body dynamics model of planetary gear is built by MSC.ADAMS and calculate meshing forces between sun gear and planet gears with each type of sun gear misalignment which are angular, radial and axial type. Based on this meshing force result, load sharing factor is calculated and the results of influence of each misalignment type to load sharing factor is obtained. Finally, gear lifetime is estimated by AGMA gear fatigue strength estimation method with load sharing factor. According to the results, radial misalignment is the most influence to load sharing factor and gear lifetime.
Mathematical Model of Seismoexplosion in Tunnel Surrounding
Authors: Svoboda Pavel , Kravtsov Alexander N.
Published: March 2015

The construction of objects of critical infrastructures such as a new roads, utility tunnels, communication networks, underground parks and other structures is associated by the way with generation of vibrations in the vicinity of the underground structures, and not only human lives can be lost but also extensive material damage can be expected due to technological and natural hazards based on vibrations. This paper presents the general governing equations for coupled thermo-hydromechanical process in the tunnel surrounds. Modeling and analysis of laminated composite cylinder applied for the objective analysis of shock wave propagation in the soils and possibilities to estimates of the tunnel structure damage.
Numerical Simulations for Bending Moment Distribution on Linings of Tunnel Excavated by Shield
Authors: Shangguan Zi Chang , Li Shou Ju , Cao Li Juan , Li Hao
Published: March 2015

In order to simulate moment distribution on linings of tunnel excavated by shield, FEM-based procedure is proposed. According to geological data of tunnel excavated by shield, FEM model is performed, and the moment, axial force and shear force distributions on linings are computed. The maximum moment on segments decreases while Poisson’s ratio of soil materials touching to segments increases. The moment value and distribution vary with Young’s modulus of soil materials. The maximum positive moment on linings is approximately equal to the maximum negative moment.
Research on Infiltration Rate of Topsoil in Combination with Steady Infiltration Model and Penetration Resistance Test
Authors: Qi Ying , Hung Jin Bai , Zhao Yu Sen , Wang Bin
Published: March 2015

In this study, infiltration experiment and survey on specific penetration resistance for the topsoil were conducted for five land use patterns at the Liudaogou Catchment on the northern Loess Plateau. A simple infiltration model has been developed based on water balance principle combined with theory of steady infiltration. The mean unsaturated infiltration rate of topsoil was estimated based on the results of infiltration experiment and survey on specific penetration resistance combined with model calculation. The results indicated that determination coefficient of relation curve between mean unsaturated infiltration rate and the topsoil specific penetration resistance is higher than 0.93; order of the mean unsaturated infiltration rate of topsoil was 10-5 m/s during the research period; sequence of the mean unsaturated infiltration rate of the five land use patterns is Alfalfa (on slope land) < Grassland (on slope land) < Grassland (on alluvial plain) < Farmland (on alluvial plain) < Sandy loess (bare land); mean unsaturated infiltration rate of alfalfa (on slope land) and grassland (on slope land) was obviously lower than that of the mean of the five land use patterns, and mean unsaturated infiltration rate of sandy loess (bare land) was significantly higher than that of the mean of the five land use patterns.
Experimental Study on the Concrete Performance Corroded by Different Salts under the Condition of Freezing-Thawing Cycles
Authors: Su Xiao Ping , Wang Ting Ting
Published: March 2015

The destructive effect of salt corrosion on concrete has attracted wide attention of civil engineering scholars nowadays. The west area in Jilin province is not only the typical frost soil region, but also is the most serious area with saline soil. In such environment damage of structural engineering often occurs under the action of freeze-thaw cycles and salt corrosion due to the lack of concrete durability. In this article Da’an city in Jilin is selected to be as the research area, and the physical and chemical properties of soil samples in spring are analyzed, the results indicate that the component of soluble salt in soil mainly includes Na+, HCO3-, Cl-, and SO42, and small amount of Mg2+, Ca2+, K+, and so on. In order to study the influence of different soluble salts on concrete durability under the condition of freeze-thaw cycles, quick freeze-thaw cycling tests on concrete durability are conducted respectively in sulfate, chloride and bicarbonate solution. Then the characteristics and laws of concrete corrosion damage under freeze-thaw cycles and salt corrosion damage are summarized.
Study on the Lateral Deformation of the Flexible Berthing Pile of High-Pile Wharf under Ship Impact Load
Authors: Zhai Qiu , Xiang Wen , Li Yu
Published: March 2015

Flexible berthing pile-high pile wharf is a system which is composed of flexible berthing pile, rubber fender and pile platform. The system was divided into two forms based on the pile platform sustained the impact load or not. The method to analysis the lateral deformation of the pile was relatively mature when the platform was subjected to the impact load. Instead, when the pile platform is subjected to the impact load, the analytical method is unsatisfactory because of the complexity about the lateral deformation of the system. This paper takes the second condition as the research object, and study the lateral deformation of the pile, rubber fender and the pile platform. The mathematical formula is built on the horizontal force balancing condition and displacement coordination at the top of pile, the method to evaluate the correlation coefficients of the formulas is suggested, and the steps that solve the formulas by iterative method are described. The theory is clear, and the result can offer a reference for structure design and code revision.
Finite Element Analysis of Asphalt Pavement Based on Drucker-Prager Criterion
Authors: Yuan Gao Ang , Li Xiao Jun
Published: March 2015

The finite element calculation method was used and the principal stresses distribution in the asphalt pavement was analyzed. The damage index of the pavement structure is defined as asphalt pavement potential damage index(APPDI) based on the Drucker-Prager criterion, and the APPDI as the pavement structure damage index are applied. The results show that: (1) The most dangerous nodes of this example model appeared between rounds from the edge of round about 0 to 2cm and the place beneath the tire. The composition of the principal stresses are tensile and compression stress.(2) Failure modes are rutting and Bottom-up which are caused by tension-compression composite shear stress.
Laboratory Investigation of the High Temperature Rheological Property of Activated Coal Gangue Modified Asphalt Binder
Authors: Yang Xiao Kai , Xiong Rui , Yang Fa , Yin Hui Qing , Yang Tao
Published: March 2015

The coal gangue is one of the largest industrial solid waste emissions in our country at present, the research about making coal gangue as the filler to modify the properties of asphalt is still blank both at home and abroad. Using rotational viscosity test and dynamic shear rheological test (DSR) to study the high temperature rheological properties of the activated coal gangue modified asphalt binder when under the condition of different filler-bitumen ratio, and compared with mineral powder modified asphalt binder; Based on this, explores the mechanism of coal gangue modified asphalt binder. The results show that the activated coal gangue instead of mineral powder can make the high temperature performance of asphalt binder increases sharply. Research results provide feasible basis of activated coal gangue mineral powder can instead of mineral powder improving the high temperature rheological performance of asphalt binder.
Quantitative Analysis Indices of Highway Landscape Design
Authors: Zhou Huai Zhi , Wei Dong Xuan , Yang Hong Zhi
Published: March 2015

In this paper, the problems existing in highway landscape design is studied on. The quantitative analysis index system of highway landscape design is set up, which is made up of diversity indices, spatial indices, sensitivity indices. The method of determining these indices is analyzed. In sensitivity indices, landscape sensitivity index and visual acuity index are set up based on the dynamic and static characters of highway landscape.
Random Dynamic Response Analysis of Asphalt Pavement Based on the Vehicle-Pavement Interaction
Authors: Li Qian , Liu Jun Qing , Liu Hong
Published: March 2015

In order to analyze the dynamic response of asphalt pavement under vehicle load, the random characteristic of pavement roughness was considered and the vehicle was simplified into 1/2 model with four freedom degrees when establishing the dynamic load model. Then the sequence of the random dynamic load coefficient was obtained by developing a MATLAB program based on the incremental Newmark-β method. Based on the plane strain assumption, a two-dimensional layered finite element model of asphalt pavement was established by ABAQUS software. Then the dynamic load coefficient was used to modify tire pressure that would be applied on the ABAQUS model. Then dynamic response rule of the model and how it was effected by vehicle speed were studied under random load. The results show that under the condition of random load, dynamic response of the pavement structure exhibiting a fluctuation trend as vehicle speed increases and the dynamic response characteristics of each point is different.
Research on the Point Cloud Data Processing Method of 3D Terrestrial Laser Scanning in Existing Railway Track
Authors: Han Feng , Duan Xiao Feng
Published: March 2015

Characterized with efficient, accurate and non-contact measurement, and the fast and three-dimensional visualization features, using 3D terrestrial laser scanning technology in track static detection has attracted widespread attention. Based on the structural characteristics of the railway line, use Geomagic software and Cyclone software in the pre-processing stage, remove the noise and redundancy, package the data after registration, get the initial line model finally. In the data extraction stage, combined with professional needs, respectively research the data extraction of track pitch and direction, and the bed section, from line, plane, and body. Which have provided a good research idea for using 3D terrestrial laser scanning technology in track static detection, acceptance, and some other aspects.
Study on Disposition of Plant Landscape along the Highway
Authors: Hu Liang
Published: March 2015

Highway landscape road will enhance coordination and harmony with the environment; effectively reduce driver fatigue, so that it remains adequate attention to driving a vehicle, thereby reducing traffic accidents, guarantee safe and smooth road. Highway landscape sequence, spatial form of roadside structures and roads with a minimum length of the curve between studied. Highway Greening emphasize ecological function should be considered, landscaping features, combined with a wide range of perfect coordination function surrounding environment, transport and other ancillary facilities function.
Study on High Temperature Performance of Asphalt Mixture Based on Rutting Test
Authors: Wang Yi , Li Wei
Published: March 2015

In order to deeply reveal the high temperature stability of asphalt mixture, rutting test was implemented to evaluate the high temperature stability of asphalt mixture, and the evaluation index is dynamic stability. The effect of asphalt type, degree of compaction, gradation type and nominal maximum aggregate size on rutting test results was studied respectively. The results showed that: modified asphalt can improve the high temperature stability of asphalt mixture effectively; the anti-rutting performance of asphalt mixture reduces gradually with decrease of the degree of compaction; the anti-rutting performance of SAC-16 is greater than that of AC-16; and the anti-rutting performance of asphalt mixture is improved with increase of the nominal size of aggregate.
Research for Noise Reduction Performance of Rubberized Asphalt Overlay
Authors: Zhang Hong Bo , Tan Hua
Published: March 2015

In the environment of noise pollution, the noise of pavement is one of the main sources of pollution. It has serious impact on the natural and social environment and interference with people's learning and work. The research shows that the tire or road noise will be a major part of the traffic noise when the car speed is greater than 30km/h and the truck speed is greater than 50km/h [1]. This paper analyzes the status quo of study of rubber asphalt overlay noise reduction and mechanism. Through effective traffic noise test method, we have analysis the noise reduction effect of rubber asphalt overlay. Results of the study shows that rubber asphalt overlay can well reduce road traffic noise and it has a good effect of improving the comfort of driving.
Experimental Study on Flexural Toughness Characteristic of Polyvinyl Alcohol (PVA) Fiber Reinforced Concrete
Authors: Su Jun , Liu Jian Ping , Chen Ming
Published: March 2015

In order to study the flexural toughness of PVA fiber reinforced concrete, employ the volume mixing ratio is 0.2%, 0.1%, 0.08%, polyvinyl alcohol (PVA) will be mixed with ordinary C40 concrete to form PVA fibers reinforced concrete. Its flexural toughness properties were tested and the load-deflection curve of all beams is obtained. Based on the ASTM method, the flexural toughness of PVA fiber reinforced concrete is analyzed. The experimental results indicate that the PVA fiber can improve the flexural toughness and the deformation ability of concrete beams remarkably. When the fiber volume ratio is 0.1%, the flexural toughness index I5 and I10 of concrete with PVA fiber are 3.73 and 6.23 times higher than that of the plain concrete respectively. The failure mode of PVA fiber concrete is changed from brittle to ductile fracture.
Influence of Additve on Over-Sulfur Phosphogypsum-Ground Granulate Blast-Furnace Slag Cement
Authors: Lv Zhi Jiang , Lin Zong Shou , Han Ya , Wang Hao Jie
Published: March 2015

The effect of sodium hydroxide (NaOH) and polycarboxylate superplasticizer amount on over-sulfur phosphogypsum–ground granulate blast-furnace slag cement was investigated. The mechanical performances and hydration mechanism of the cement with different proportions of NaOH and polycarboxylate superplasticizer (BASF) were analyzed based on setting time, the additive quantity of water, strength test, XRD and SEM analyses. The results showed that the polycarboxylate superplasticizer, can increase the densification and the strength of the cement ,to improve the performance of the cement anti-carbonation properties. NaOH as an alkali activator significantly reduces the cement setting time and improves the cement early strength. But the acceleration of hydration process produces coarse crystalline hydration products and the osteoporosis structure of hardened paste, which has a negative effect on long term strength.
Road Performance of Common Piezoelectric Transducer for Asphalt Pavement Energy Harvesting
Authors: Li Cong
Published: March 2015

The discussion in the paper is focused on energy transition efficiency, stiffness and intensity of common piezoelectric transducers in the following aspects. Firstly, we have found out that bridge piezoelectric transducers possess high energy transition efficiency and the similar stiffness to asphalt pavement through comparing and analyzing road performance of several common piezoelectric transducers. Thus, we hold the view that it is applicable for energy collection of asphalt pavement and will be analyzed subsequently. Secondly, we have analyzed energy transition efficiency and stiffness characteristics of arc bridge piezoelectric transducer and rectangular bridge piezoelectric transducer in laboratory test. The results show that, under the same load stress, arc transducers are better than rectangular transducers in terms of energy transition efficiency; but comparing with rectangular transducers, arc transducers are more prone to be destroyed, which is not helpful for bearing traffic load.
The Inhibitory Effect of Polypropylene Fibers towards the Shrinkage of Cement Based Material
Authors: Yuan Hua , Li Yun Hua
Published: March 2015

At present, polymers, fiber and other additives are added to the cement based materials by researchers at home and abroad for the purpose of dealing with the difficult problems occur in practical application, such as low tensile strength, small ultimate elongation, remarkable brittleness, easy to crack and other issues. In this paper, the shrinkage deformation of cement based materials are classified into four types upon the analysis of shrinkage reasons, then the inhibitory effect and its mechanism of polymers fiber for cement based material are investigated.
Technical Economic Analysis of Application of Multi-Ribbed Floor Structure in Basement Engineering
Authors: Zheng Rui
Published: March 2015

To summarize the feasibility, science and economy of the multi-ribbed floor structure in one basement engineering, its design theory, technical economic and construction technology are analyzed in detail.
Influence of Concrete Age on Compressive Behavior of FRP-Confined Concrete
Authors: Lim Jian Chin
Published: March 2015

This paper presents the results of an experimental study on the influence of concrete age on the compressive behavior of fiber reinforced polymer (FRP)-confined normal-strength (NSC) and high-strength concrete (HSC). The first part of the paper presents the results of 18 FRP-confined and 18 unconfined concrete specimens tested at 7 and 28 days. To extend the investigation with specimens with concrete ages up to 900 days, existing test results of FRP-confined concrete was assembled from the literature. Based on observations from both short-and long-term influences of concrete age on compressive behavior of FRP-confined concrete, a number of important findings were drawn and are presented in the second part of the paper. It was observed that, at a same level of FRP confinement and unconfined concrete strength, the stress-strain behavior of FRP-confined concrete changes with concrete age. This difference is particularly pronounced at the transition zone of the stress-strain curves. It is found that, in the short-term, the ultimate condition of FRP-confined concrete is not significantly affected by the age of concrete. However, in the long-term, slight decreases in the compressive strength and the ultimate axial strain are observed with an increase in concrete age.
Free Vibrations of Beams on Viscoelastic Pasternak Foundations
Authors: Peng Li , Wang Ying
Published: March 2015

This paper investigates free transverse vibrations of finite Euler–Bernoulli beams resting on viscoelastic Pasternak foundations. The differential quadrature methods (DQ) are applied directly to the governing equations of the free vibrations. Under the simple supported boundary condition, the natural frequencies of the transverse vibrations are calculated, and compared with the results of the complex mode analysis method. The numerical results obtained by using the DQ and the complex mode methods are in good agreement for the first seven order natural frequencies, but with the growth of the orders, the small quantitative differences between them increase. The effects of the foundation parameters on the natural frequencies are also studied in numerical examples.
Influence of Prestress on Axial Compressive Behavior of High-Strength Concrete-Filled FRP Tubes
Authors: Vincent Thomas
Published: March 2015

This paper presents an experimental investigation on the influence of prestress on axial compressive behavior of concrete-filled fiber reinforced polymer (FRP) tubes (CFFTs). A total of 12 aramid FRP- (AFRP) confined high-strength concrete (HSC) specimens with circular cross-sections were tested under monotonic axial compression. All specimens were cylinders with 152 mm diameter and 305 mm height and their unconfined concrete strengths were approximately 100 to 110 MPa. The influence of FRP prestress was examined by applying 3 different levels of lateral prestress ranging from 4.29 to 7.27 MPa. In addition to the prestressed specimens, companion specimens with no applied prestress were manufactured and tested to establish reference values. Results of the experimental study indicate that the influence of prestress on compressive strength is significant, with an increase in ultimate strength observed in all prestressed specimens compared to that of non-prestressed specimens. On the other hand, the influence of prestress on axial strain was found to be minimal, with prestressed specimens displaying a slight decrease in ultimate strain, compared to their non-prestressed counterparts. The results also indicate that prestressing the AFRP shell prevents the sudden drop in strength, typically observed in FRP-confined HSC specimens, that initiates at the transition point which connects the first and second branches of the stress-strain curves.
The Research Progress in a New Kind of Anti-Blast Wall
Authors: Zhang Zhi Gang , Li Ming Zhao , Kong Da Qing , Ge Tao , Wang Chun Ju
Published: March 2015

Anti-blast wall can effectively reduce blast load and, therefore protect human and structures from external explosion. A new kind of anti-blast wall, HESCO Bastion wall (HB wall), was designed by the QIAOSHI(China) International Trade Limite. The research about the HB wall was mainly focus on the construction of rotation model and the anti-overturn stability of the wall, but no research could be found on the blast wave pressure distribution law behind the HB wall, the anti-penetration capability and the assembling mode of the HB wall. In this paper, research progress of the HB wall has been presented, research ideas about the HB wall have been put forward.
A Novel Approach of Patrol Ship Configuration and Fleet Planning
Authors: Zhao Fu Bo , Wang Yang , Xie Xin Lian
Published: March 2015

Due to the lack of accurate and rational quantitative means as well as theoretical basis for patrol ship configuration, a patrol ship configuration model has been presented. To establish this configuration model, factors impacting patrol ship configuration were identified, mathematical relationships between these factors and patrol ship configuration amount were determined at the same time. Furthermore, the patrol ship configuration of Guangdong Maritime Safety Administration (GDMSA) had been taken as a case study. The result shows that GDMSA should be equipped with fewer patrol ships than it has currently.
Analysis of the Tanzania-Zambia Railway Rail-Sea Intermodal Transportation Collection and Separation System
Authors: Jiang Lei , Wei Yu Guang
Published: March 2015

Chinese enterprises will participate in the Tanzania-Zambia railway reconstruction project and operation management by way of franchising. Analyzing the Tanzania and Zambia policy and the cargo component of the Tanzania-Zambia railway, this study put forward some relevant suggestions on the structure and conditions of rail-sea intermodal transportation. In the end, in order to flourish the economy in Tanzania-Zambia area, Tanzania-Zambia railway should have access to the port develops market, set up the logistics center and develop sea-rail intermodal transportation vigorously.
Concepts and Methods of Comprehensive Traffic Planning in Germany
Authors: Wu Ping , Gao Yong Liang , Wu Wen
Published: March 2015

This passage, through field study, elaborates comprehensive traffic planning in Germany from the levels of comprehensive traffic planning, the methods and targets of comprehensive traffic planning, the evaluation index system of comprehensive traffic planning and the public participation of the planning. It provides reference to the comprehensive traffic planning in our country.
Structural Equation Model of Public Evaluation of Transfer Efficiency of Integrated Traveler Transportation Hub
Authors: Wang Xian Guang , Li Cong , Li Yan Hong , Wu Ping
Published: March 2015

Call on the public to evaluate the transfer hub of the integrated traveler transportation hub, for it could enhance the objectivity of the evaluation and underline the people-oriented principle to the greatest degree, thus creating fair method of decision-making. Based on the transfer characteristics of the integrated traveler transportation hub and the service level of transfer infrastructure, this paper establishes the structural equation model of the integrated traveler transportation hub and explores the identification, fitting, modification and applications of the model.
Selection and Evaluation of Railway Freight Third-Party-Logistics Based on F-AHP Method
Authors: Sang Jun Jing , Wang Xi Fu , Sun Hong Sheng , Li Meng Liang
Published: March 2015

According to the selection and evaluation of railway freight transport of the third party logistics, establish a complete set of fuzzy hierarchy evaluation (F-AHP) model of railway freight third party logistics company. Taking Nanchang Train Depot as an example of empirical analysis, Calculate and screen the most appropriate third party logistics company. At the same time, we confirm the reliability and authenticity of F-AHP method that applies to the third party logistics company, which provides reference experience for the railway freight department on the selection of third party logistics companies.
Study on the Transformation of the Development Model of the National Public Information Sharing Platform for Transportation & Logistics
Authors: Ji Shou Wen , Feng Qiu Xing
Published: March 2015

The article researches on the development model of the National Public Information Sharing Platform for Transportation& Logistics (LOGINK), in which the author introduces the function orientation of the LOGINK. Based on the current development status of the platform, the article predicts the development trend in the future. Then, it analyzed the necessary of the transformation of the LOGINK’s development model. In order to ensure the sustainable development of the platform, this paper proposes that the development model should be changed from “Charity” to “Charity + Appreciation”. Lastly, the article gives a plan about the service model and profit model of the platform in the future.
Evaluation and Modeling of Passenger Vehicle Celeration Performance Based on Artificial Neural Networks
Authors: He Yi , Chu Duan Feng
Published: March 2015

As the siginificant factors influence passengers comfort, the vehicle celebration performance may easy to cause accidents, such as hard acceleration and deceleration performance. In order to find the relationship between passengers comfort and celebration performance, 35 passengers and three professional drivers were recruited in the field experiment. The passengers’ comfort feelings were analysed by subject questionnaires, the acceleration and deceleration data were received by CAN bus.The Artificial Neural Networks (ANNs) model was elaborated to estimate and predict the passengers comfort level of driver unsafe acceleration behavior situations. Therefore, the subject views of the passengers could be compared to object acceleration data. An ANN is applied to interconnect output data (subjective rating) with input data (objective parameters). Finally, it is found the investigatioin have demonstrated that the objective values are efficiently correlated with the subjective sensation. Thus, the presented approach can be effectively applied to support the drive train development of bus.
The Prediction of Vehicle Collision Risk in Traffic Conflict Zone Based on Bayesian Network
Authors: Yan Li Xin , Gao Song , Cai Hao , Wan Hui
Published: March 2015

The external traffic environment has a big influence to the traffic safety during the area of traffic conflict place，and to analysis the relationship between the external traffic environment factors and driving safety is helpful to improve the traffic safety. The method of comprehensive analysis the historical data and expert survey data is used to explore this question. And at the same time, the collision risk prediction model during the traffic conflict place is built by the Bayesian network. According to the data analyzing, the node variable, the state of variable and the conditional probability table of this model is also built. Finally, the software of Hugin is used to deal with the posteriori probability of collision risk, and the result proved that this model can predict the collision risk accurately during the traffic conflict area, and the data analyzing showed that the factor of the driver's intention, the vehicle speed and the headway have a significance influence to the traffic safety.
Dynamic Simulation and Optimization of Traffic Signal System
Authors: Xiang Jia Jia , Xue Lian
Published: March 2015

With the economic development and urbanization, the number of motor vehicles increased rapidly, because the contradictions between urban traffic supply and demand imbalances are becoming increasingly acute. We used the cell transmission model (CTM) to optimize on the basis of a single intersection by observing the delay time and the traffic capacity, research into the intelligent urban traffic signal control system, improve the operating efficiency of the existing transportation system. To a certain extent, it addresses the issue of urban traffic congestion.
Empirical Research on Topological Characteristics of Air Traffic Situation Network
Authors: Wang Hong Yong , Wen Rui Ying , Zhao Yi Fei
Published: March 2015

A method for description of structural characteristics of air traffic situation based on the theory of complex network was proposed. This method characterizes the air traffic situation from three dimensions, including single aircraft, local sector, and overall sector. We selected the routinely-recorded flight data in an air traffic control sector within China's airspace in 2013. With the aircrafts in the sector regarded as nodes, and with the between-aircraft proximity relations as edges, we constructed an undirected and unweighted aircraft network. The results show that network node degree can distinguish the key aircraft in the sector; the network connection rate reflects the proximity of aircrafts; the clustering coefficient identifies the presence of high-density aircraft group.
Research on Crossing Speed of Pedestrians Based on Dynamic Density
Authors: Qu Zhao Wei , Yang Qiu Jie , Song Xian Min , Bai Qiao Wen
Published: March 2015

To study the real-time changes of pedestrian crossing speed, the paper collected a series data at three large intersections in Changchun City. Firstly, using video processing software and artificial statistical methods, instantaneous crossing speed was extracted and calculated. Then the relationship between crossing speed and dynamic density was established. In addition, the paper also analyzed the effect of pedestrian number and its position on dynamic density. At last, a new method of calculating crossing speed was proposed based on dynamic density. The results in this paper provide a better reference for pedestrian signal timing.
Tracking of Traffic Monitoring Targets in Complicated Traffic Scene Based on MeanShift Algorithm
Authors: Zhao Jian You , Cui Jian
Published: March 2015

To avoid the the interference of busy backgrounds when tracking, detecting and recognizing moving targets in complicated traffic scene, an improved algorithm is proposed on the basis of the original MeanShift algorithm which use different colors of the centroid positions to identify the target. MeanShift algorithm can be used to calcucte the centroid position of each color in the monitoring area. Then the centroid positon of every color in every frame can be identified by analyzing spatial distribution and iteration. At last, establish weighting functions to increase the recognition accuracy so as to recognize and track the targets in complicated traffic scene. Experiments have shown that the improved algorithm is better than the traditional algorithm in identifying and tracking moving targets in the monitoring of complicated traffic scene.
Pedestrian Gathering and Evacuating Simulation and Facilities Optimized Analysis of Wangfujing Station of Beijing Metro
Authors: Zhang Chen , Han Bao Ming , Wang Yu , Zhou Wei Teng
Published: March 2015

In order to find the bottleneck of facilities, observe the crowded situation and analysis the influence on the platform and station hall of new line’s construction, the paper simulates passenger walking and distribution in the station to optimize the congestion. The simulation by SRail system of Wangfujing station was given. The simulation results indicated that the platform and channel of line 8 in Wangfujing station present different degrees congestion during peak hours and that ticket gates were unreasonable to some extent. To solve these problems, optimization schemes including change facilities’ service direction, set up short isolation belts and broaden channels were proposed. In the end, the reasonability of optimization schemes was verified during simulation.
Reinforced Concrete Frame Structure Dynamic Analysis Based on SAP2000
Authors: Zhong Ju Fang , Fan Zhi Peng , Zhan Luo Long , Liang Jun Wei
Published: March 2015

Structure under long-term load, environmental erosion, material aging, especially under the seismic action can cause damage accumulation and bearing capacity decrease. In order to make sure its safety and reliable, avoid extreme cases of catastrophic accident, it is necessary to carry out the engineering structural health diagnosis. Using SAP2000 software, seismic response analysis for a two layer reinforced concrete frame structure is carried out. The laws of the acceleration response time history and spectrum under different seismic action were found out by discussing structure in no damage and different damages. The results showed that no matter where the damage located, the top node response increment is bigger than the middle node, the peak of acceleration response spectrum changes little with the beam damage degrees changing. Selecting the acceleration response peak of the top node as a structural damage index is feasible in the damage detection and identification of engineering structures, but analyzing the response spectrum for damage detection is unpractical.
A Strategic Model for a Complex Infrastructure in Northern Europe
Authors: Miccoli Saverio , Finucci Fabrizio , Murro Rocco
Published: March 2015

As part of the processes that are forming and integrating a shared European identity, considerable importance attaches to projects whose aim is to create a network of major lines of communication, facilitating access between neighbouring areas and improving existing connections at the continental scale. This paper discusses the Øresundbron project, a complex structure linking Denmark and Sweden across the strait of Øresund, consisting of a bridge and tunnel with associated installations on either coast along with various consolidation, reclamation, and environmental upgrading works. A description of the technical and construction aspects of the project is followed by a discussion of the financial, socio-economic and procedural feasibility aspects, showing how the decisive strategy for successfully and sustainably implementing a project of this type is to take an integrated approach to design.
City Square Landscape Design Analysis
Authors: Wang Xue Yong , Yan Xiao Jie , Zhang Na , Zhang Yong Chao
Published: March 2015

Taking the design of Tai'an city square as an example, the paper analyzes different types of city square landscape design, elaborates on their commonness and characteristics, and makes a detailed study of the emerging city square to provide a solid theoretical foundation for the innovational design of new city squares in the new era .