bluuebunny/crossref_metadata_2025 huggingface dataset:
Literature Review of Coupled Temperature and Moisture Transfer in Concrete Structure
Authors: Lou Er Zhao , Qiang Sheng , Liu Lian Jian , Ni Yan Bo , Jiang Jian Bo , Hou Guang Pu
Published: March 2015

Concrete is a typical heterogeneous porous media material, but the influence of the heterogeneity of concrete on coupled temperature and moisture transfer is rarely involved in the present numerical methods. Thus, the research direction on the coupled temperature and moisture transfer with damage evolution of the heterogeneous material will be greatly helpful to understand the coupling mechanism. This paper firstly presented the purpose of the study on the coupled temperature and moisture transfer in concrete, and then offered a literature review of the development of this theory. To launch the elaboration of this topic, three relative important parts were presented separately in this paper. (1)The comprehensive theory of porous media heat and mass transfer. (2)The development of the coupled temperature and moisture transfer on mesoscopic scale. (3) The numerical simulation methods of the coupled temperature and moisture transfer. And then the influence of damage on the parameters of temperature field and humidity field was pointed out, which would be a valuable research field.
Overview of Numerical Simulation Model of Mesoscopic Concrete Crack
Authors: Li Si Qi , Bai Yin
Published: March 2015

Through a number of literature analysis and research, this paper investigates the reviews and comparison under the meso model for numerical simulation of crack in a finite element model (FEM), including discrete fracture model, smeared crack model, fracture mechanics crack model,bond crack model. Studies show that: compared to other fracture models , smeared crack model by eliminating the need to change the unit type and re-division unit grid computing simple and widely used for treatment of concrete cracks in finite element method, the author cites a using smeared crack model example that are discussed in the paper.
Powder-Cement Ratio Affects the Overall Performance of the ATB
Authors: Deng Wei Hua
Published: March 2015

Powder-cement ratio plays a key role in asphalt mixture. Only after asphalt adsorbs the surface of mineral powder to form a thin film, asphalt produces the adsorption on aggregate, so slag asphalt is real asphalt binder. Powder-cement ratio is different, road performance is different too. Through laboratory test, analysis powder-cement ratio reflects on heat, cold, water stability and anti-reflective cracks of ATB, make a range of radio of filler to bitumen, in order to provide a reference for the design of ATB composition.
Research of High Voltage Electrostatic Filter Composite Horizontal Collector Exclusive Filter Material
Authors: Zhu Qing Qing , Miao Qiang Qiang
Published: March 2015

We selected a typical filter material for high voltage electrostatic filter composite horizontal collector. Air filter can achieve high speed. It cost very low and can endure high temperature resistance. Removal of fine particles of dust effect is good. Solving the complex problems of higher smoke temperature conditions of traditional bag house can not handle, while reducing the dust collector investment cost, promote the development of China's dust remover industry.
Research on Chemical Composition Changing of Heteroatom Compounds during Asphalt Aging Process
Authors: Zhang Hai Yan , Liang Jun Lin , Cao Dong Wei , Xiong Jian Ping , He Min , Zhang Yan Jun , Chen Yan Ju
Published: March 2015

It’s easy to cause asphalt aging in the production, storage, transportation and construction sectors; the polar compounds of asphalt in the aging process were studied by using negative-ion electrospray ionization (ESI) Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS).Test results showed that, with the deepening of aging process, molecular weight of asphalt samples was increasing. Ox class compounds had the biggest content change; Content of Nx class compounds were basically stable; Content changing range of class NxOy compounds was affected by types of compounds. Aging degree of heteroatom compounds was affected by molecular condensation degree, and oxidation rate of low DBE compounds was higher than that of high DBE compounds. The result is of value to analysis of asphalt production and asphalt recycling.
Research on the Optimization Method of Compatibility between Polycarboxylic Admixture and Cement
Authors: Wang Hai Chao , Chen Chen , Xu Xi Quan , Yang Zhi Gang , Zhang Hua Jie , Zhao Chun He
Published: March 2015

In this paper, the method to adjust the production process of polycarboxylic admixtures mother liquid is researched according to the production of polycarboxylic admixtures. One polycarboxylic admixture cannot be adapted to all cements because of the influence of the mother liquid, although it could be adjusted by composite stabilizer. This paper studies the method of parameter adjustment on the level of factor analysis according to the process of polycarboxylic admixtures. The fluidity of cement slurry test is carried out when the type of cement is changed. On the basis of the test results the parameters are analyzed to design the molecular structure of the polycarboxylic admixtures, which could solve the problem of compatibility between polycarboxylic admixture and cement fundamentally.
Research on Waste Glass Concrete Elasticity Modulus
Authors: Jia Shi Long , Gong He , Zhang Bei Chuan , Zhang Chao Fan , Li Yan Yan
Published: March 2015

Waste glass is an industrial waste and household garbage, having a "flash color pollution" notoriety. Although some white glass can be processed into glass again, however, low utilization. But much of the waste glass still cannot be recycled. The key to improve the utilization of waste glass is how to effectively use colored and mixed waste glass. Waste glass aggregate concrete as a new material, the study of its basic performance is not mature. Taking into account the impact of different glass replacement rate on their basic mechanical properties, this paper tests carried out static compressive elasticity modulus test with glass concrete. Study the mechanical properties and deformation performance of glass concrete columns the basis of its basic mechanical properties, in order to obtain the glass concrete column of structure performance parameters.
Fire Test on Two-Way Slab with Two Edges Clamped and Two Edges Simply Supported
Authors: Yang Zhi Nian , Zhang Yuan , Lei Yang
Published: March 2015

This paper describes the results of a fire test conducted on two-way slab with two edges clamped and two edges simply supported. The details of support condition, arrangement of reinforcement, position of displacement transducers and thermocouple trees are described. The experimental results such as the temperature distributions within the slab, vertical deflections and horizontal displacements are presented. The experimental results show that the temperature distribution along the slab depth was nonlinear and the temperature gradients in the slab were large. Main cracks near the clamped edges occurred on the top surface of the slab. It is shown that two-way slab with two edges clamped and two edges simply supported has good fire resistance.
Research Progress and Prospects of the Constitutive Model of Green Ecological Concrete
Authors: Ding Ke , Zhang Kai Fan
Published: March 2015

Green ecological concrete is a new type of building material. It is important to study the relationship of the green ecological concrete between stresses and strains. In the paper, some constitutive models which are suitable to the green ecological concrete are introduced. These models include the linear elastic constitutive model, cauchy model, kuper-gerstle model, constitutive model based on the rheological theory, constitutive model based on plastic fracture theory etc. The constitutive model based on the rheological theory well describes the mechanical properties of the green ecological concrete.
Research Progress of Poly Carboxylic Acid Concrete Shrinkage Reducing Agent
Authors: Tang Shi , Zhang Lei
Published: March 2015

The reduction mechanism, characteristics of molecular structure, and main factors affecting the reduction ability are reviewed in brief. The research progress of poly carboxylic acid concrete SRA are also reviewed. And based on the structure characteristics of poly carboxylic acid SRA, more functional poly carboxylic acid SRA is the main development direction in concrete shrinkage agent reducing in the future.
The Combined Effects of Fiber and Cement-Based Composite Materials
Authors: Yuan Hua , Li Yun Hua
Published: March 2015

As far as the problems arising in the using of cracking mortar is concerned, a lot of work are done by researchers to improve the performance of cementations material, including adding various fibers into the cement matrix. The crack resistance mechanism of fiber-reinforced cement mortar is studied by scholars through a variety of methods. In this paper, the roles of fiber in fiber reinforced cement-based composite materials and the explanation thereof proposed by domestic and foreign scholars are summarized.
Fracture Analysis of Welded Steel Connections in Pre-Crack Condition
Authors: Feng Yu Cai , Sun Yu Ping , Zhang Ju Tao , Yu Shan Shan
Published: March 2015

Extended finite element method (XFEM) can effectively describe the phenomenon of steel node cracks growth and extension. In this paper, extended finite element method is used for the beam weld node end under the concentrated load to analyze node fracture under no initial crack and pre-crack condition. The result shows that: under the no initial crack condition, crack appears near the weld root, where the bottom and upper of the weld is easy to crack than the middle,because of the necking phenomenon,which means that both end stress is higher than the middle. Crack firstly appears in the weld bottom, extending from the bottom to up. The crack tip makes stress concentration, which accelerates the crack extension. The location of the pre-crack has the influence on the node fracture, which means that the farther the position from the weld root is, the harder it is to crack and grow. Pre-crack position coincides with no initial crack extension path, promoting crack growth and extension.
The Mechanism Research of Foam Glass under Surface Depression
Authors: Wu De Long , Tian Ying Liang , Guo Shu Guang
Published: March 2015

The under surface depression of foam glass blanks as one of the typical defects, influences and impedes the quality of foam glass and material cutting rate. This paper studies the water content of release agent and open flame burning temperature effects on under depression of foam glass, to reveal its generation mechanism, using TG-DSC, XRD, FTIR, and other analytical methods. The results show that, with the increase of drying temperature, the under surface depression phenomenon reduces, indicating the air cavity caused by heating vaporization of water molecules. The surface is white. In the early flame heating, firing temperature is more than 700°C, by the mold bottom heating carbon, resulting in carbon black early reaction gas, not be wrapped by glass, eventually gathering to form an air chamber. The surface is grey.
The Performance of the Ceramsite Concrete Block and its Application Research
Authors: Yu Le Le , Chen Jia Dai , Wu Yi Wen
Published: March 2015

Ceramsite concrete and ceramsite concrete block are characterized by lightweight, high strength and good thermal insulation properties, which are widely applied to construction. If amoderate amount of polystyrene particles is added during the working process of ceramsite concrete block in order to improve its physical properties, a kind of new ceramsite concrete building materials is produced. Based on the experimental studies, the article expounds the physical and mechanical properties in terms of density, water absorption and compressive strength, with the purpose of providing reliable evidence for the application and popularization of new ceramsite concrete block.
The Status of Biological Research and Prospect Analysis of Asphalt
Authors: Tang Wei
Published: March 2015

Due to the current over-exploitation and use of oil resources imminent danger of being exhausted, petroleum bitumen from oil, the problem of oil resources and environmental development of the current situation forces us to constantly look for and application of new, renewable alternative materials. Currently, the world's best research and development of biomass energy is an inexhaustible renewable energy. This paper researches on biological asphalt collect summary summarizes the current research status of biological asphalt, aggregate its application in road engineering performance, analyze their development, application prospects. Current research indicates that biological asphalt bitumen is an efficient alternative to petroleum products, to enhance road performance while conserving resources better.
The Study of Mortar Specimens Containing Waste Glass Powder on the Resistance to Sulfate Erosion
Authors: Ke Guo Jun , Zeng Dai Nian , Zou Pin Yu
Published: March 2015

Different particle size range of waste glass powder amount to replace part of the cement made to mortar specimens, which were soaked in 5% sodium sulfate solution and water after standard curing .Then determining its mechanics properties in various ages, observing and analysis of the micro structure of the section of the specimens by SEM, exploring the ability of mortar specimens made in different size and dosage of waste glass resist to sulfate. The results indicate: Along with the rising of the size and content of glass powder. The performance of mortar specimens resisting to sulfate were on the decline. When replacement amount was 10%, all kinds of particle size of waste glass mortar specimens are better than that of ordinary Portland cement on mechanical properties, When the glass powder size is less than 53μm, all kinds of mortar specimens with high content of waste glass are better than that of ordinary Portland cement on mechanical properties.
The Subsidence Analysis of Experimental Post-Tensioned Concrete Slab Model in the Course of the Static Load Test
Authors: Mynarcik Petr
Published: March 2015

This article presenting results of subsidence measurement on experimental post-tensioned concrete slab model during static load test. This subsidence measurement was realized on the large scale concrete slab model and brought important data for computer modeling by FEM (finite element method). The experiment simulated the load effect of the base plate of heavy rack. In the course of the static load test subsidence was measured by set of potentiometric gauges at the particular points in real time. The experiment continue on research activity focused on problematic of interaction between concrete structures and subsoil and was realized at the Faculty of Civil Engineering, VSB – Technical University of Ostrava, Czech Republic.
Performance Analysis of Magnetorheological Rubber Reinforcing Cord Fabric
Authors: Chen Xian Zhong
Published: March 2015

Magnetorheological rubber material is a kind of composite material of magneto elastic coupling with multi functions, which is composed of magnetic particles and the mixed rubber films with the magnetic properties of the material, but because of its mechanical properties has limited practical use, and nylon cloth which has the advantages of high strength, dimensional stability, can be the ideal framework of magnetorheological rubber. The results show that for the magnetorheological rubber made from the NR/SBR blend, the tensile strength of the magnetorheological rubber with the cord fabric can greatly improve, the tensile strength can reach 17.8MPa, but also can improve the shear modulus of magnetorheological rubber and zero field storage shear modulus.
Precursing Application and Promotion of BIM Technology in Construction Phase
Authors: Zhou Yi , Jiang Jian Lin , Zeng Ke , Cao Xin Yi , Zhang Dong Ping
Published: March 2015

Building Information Model (BIM) was initially proposed by Autodesk in 2002. Currently, BIM has been widely recognized in the industry worldwide, baced on its great value. The concept of BIM has been gradually well-known in construction industry in China, and it’s a good prospect for development and application of BIM. But its application and promotion is still in start-up phase in China. It should be actively promoted in whole society. It was suggested in the paper: application and promotion of BIM technology should be implemented step by step, and precursed to apply in construction phase, ultimately achieved overall industrial application. This paper analyzed characteristics and advantages of application and promotion of BIM technology in construction phase, and discussed implementation sschemes and steps. Finally, it proposed BIM should be grandly guided to achieve comprehensive application in project’s whole-life.
Prediction on Coupling Loss Factors of Building Members
Authors: Lan Jun Xin , Huang Xian Feng , Wei Shang You , Zhuang Zhi Xiang
Published: March 2015

Coupling Loss Factor (CLF) is a parameter describing building sound loss, which can be stand for energy loss in the process of crossing the structure. A low value of CLF refers to the high insulation performance of building member. Therefore, reducing the coupling loss is a favorable way to improve the sound insulation. For the purpose of exploring the relationship between the properties of building materials and CLF, the commonly used building materials are selected to analyze. It is indicated that the properties of building material have obvious effects on the CLF. As the consequence, some predictions and analysis are carried out in this paper.
A Stress Analysis of the Circular Orifice Problem for 2k Periodic Radial Cracks
Authors: Guan Lu
Published: March 2015

Using the method of complex analysis, the study investigates the circular orifice problem for 2k periodic radial cracks through constructing conformal mapping, and provides an analytical solution for the crack-tip stress intensity factor (SIF). From this we have simulated the circular orifice problems of cross-shaped cracks, symmetrical eight-cracks, single cracks, symmetrical double-cracks, and symmetrical four-cracks.
An Impact Dynamics Modeling Method with Tangential Impulse in Three-Dimensional Space
Authors: Chen Gang , Liang Ji , Jia Qing Xuan , Sun Han Xu
Published: March 2015

This paper studies the impact of two rigid bodies considering tangential friction in three dimensional space. It extends Stronge’s spring-based planar contact structure to three dimensions by introducing three orthogonal virtual springs. Impact analysis is carried out using normal impulse rather than time as the only independent variable, unlike previous work on tangential impulse. This makes the algorithm more compact. At last, collision is governed by a system of differential equations. Modularity of the impact model makes it easy to be integrated into a multi-body system.
Study on Calculation Theory of Elastic Flexural-Torsional Buckling Bearing Capacity for Castellated Beams
Authors: Chen Xiang Rong , Yuan Hai Long , Chen Xing , Liu Zhen Wen
Published: March 2015

The structure of castellated beams is complex, using the computation theory of elastic flexural-torsional buckling of H-shaped beams to study the elastic flexural-torsional buckling strength of castellated beams under different loads, based on simplifying the section's eigenvalues. In addition to the theoretical investigation, the finite element analysis of the accurate critical loads of the beams had been done by the ABAQUS software, a comparison has been made between the calculated loads and analyzed results, error is smaller. Analyzing the effects that divergence ratio, depth-span ratio and distance-height ratio has on the elastic flexural-torsional buckling loads of castellated beams and draw out some reduced calculation methods for the section's eigenvalues and elastic flexural-torsional buckling critical load of castellated beams.
The Random Response of a Single Degree of Freedom Generalized Maxwell Damping Structure
Authors: Zou Wan Jie , Li Chuan Gao , Zhang Yun Xia
Published: March 2015

Using the model of stationary white noise excitation, defining the exact analytic method of random response and nearer value of earthquake action about single degree of freedom generalized Maxwell damping, firstly transform the motion equation into standard form, with the Laplace transform and Inverse Laplace transform method, obtained the exact analytical formula of structural response, calculate the response variance by the complex modal method and frequency domain decomposition and make comparisons, The response variance decomposition for the first standard vibrator and second order of the standard vibrator, According to the corresponding relationship between maximum response of the second order vibrator and The design response spectrum, calculated the maximum response by it, base on the maximum response proportion of the first standard vibrator and second, obtained the design of the structural response values and its corresponding earthquake force.
Study on an Analytical Solution of Gas Seepage Equation Considering the Adsorption Effect
Authors: Zhang Zhi Gang
Published: March 2015

The functional relationship between rock and coal permeability and gas adsorption quantity has been determined, based on earlier experimental results. Then, by method of mathematical physics, the authors derived an analytical solution for a gas seepage equation in which the adsorption effect has been considered. This analytical solution could be used for developing the theory of Seepage Mechanics and Computational Fluid Dynamics, and for checking and correcting various numerical solutions as a standard solution, and for inspiring various calculating techniques such as difference schemes, grid generation, and others as well. The analytical solution derived in this paper has extremely important practical significance in conducting the arrangement of gas extraction operation in coal mine and the CBM (coal bed methane) development planning.
Design and Realization of the 3D Electronic Chart Based on GIS and Virtual Reality Technology
Authors: Wei Xiao Yang , Wang Yang , Yan Xin Ping , Tian Yan Fei , Wu Bing
Published: March 2015

Two-dimensional electronic chart system can’t intuitively express the various information of 3D navigation environment, and the existing 3D electronic chart system lacks comprehensive display and scientific quantitative analysis. In that context, designed a 3D electronic chart system framework based on GIS and virtual reality technology (VR technology) and studied the key technologies such as visualization of 3D navigation environment, numerical simulation of water current and dynamic ship information display. Consequently, a 3D electronic chart system has been developed for Sutong Bridge section of Yangtze River waterway and it is verified to be feasible and reliable for ensuring safety of navigation.
Design for a Dual-System Satellite Navigation Anti-Jamming Receiver
Authors: Li Fang Neng , Xu Jiang Ning , Li Hou Pu , Yin Wei Wei
Published: March 2015

In order to ensure that a satellite navigation receiver is able to work under the navigation warfare environment, a design for dual system anti-jamming satellite navigation receiver is proposed. Space-time anti-jamming technology is analyzed, which takes linearly constrained minimum variance (LCMV) as the optimal criterion, weighted by power inversion, enhanced anti-jamming capability of the receiver. Digital beam forming technology with a stronger anti-jamming performance is realized by feedback of satellite orientation information from baseband. Simulations show that traditional space-time interference suppression technology can realize 70dB anti-jamming capability for an interference, and by introduction of the beam forming technology, the anti-jamming capability for an interference can achieved 85dB.
Direct Transformations Formulae between Polar Gauss and Stereographic Projections
Authors: Chen Cheng , Bian Shao Feng , Li Hou Pu , Liu Bo
Published: March 2015

Definitions of polar Gauss and stereographic projections are introduced, and the two projections sketches of the Arctic Circle are drawed with the help of Geocart software, according to these two projections formulae. From the angles of real and complex numbers respectively, direct transformations formulae between polar Gauss and stereographic projections are derived through series of derivations. Finally, correctness and reliabilities of the formulae are tested and verified by numerical examples by comparing the calculated coordinates of the projections formulae with the calculated coordinates of the projection transformations formulae. The formulae have universal applicability, and it can provide reference for polar mapping and navigation.
Hydraulic Engineering Topographic Mapping and Modeling Based on Three Dimensional Laser Scanning Technology
Authors: Hu Chao , Zhou Yi Hong , Zhao Chun Ju , Pan Zhi Guo
Published: March 2015

Topographic mapping and modeling is one of the most basic and important work in hydraulic engineering construction. This paper present a work flow which contains data measurement, pre-process and post-process with three dimensional laser scan technology. By adopting B-tree and its expansion structure, a multi-level point cloud management and storage method has been established. Then propose a contour generation method based on scan data and the equivalent point interpolation data. A self-adaptive mesh Delaunay algorithm is introduced with point cloud data in order to generate triangular irregular network digital elevation model. Finally, the modeling accuracy and error has been analysis, the results proves this method is with high efficient and accuracy and can be provide assistance for the project construction.
Spatial Autocorrelation Test of Engineering Deformation Data
Authors: Zhang Song Lin , Yang Xiao Meng , Zhang Kun
Published: March 2015

Deformation of engineering structures is often measured in order to ensure that the structure is exhibiting a safe behavior. The relationship between deformation and environmental factors is often studied through regression to pick out ambient factors which have major impact on the deformation of the engineering structure. One of the regression assumptions is independence of observations. However, when observations are closer to each other, there is spatial autocorrelation in the observations and the assumption does not hold. Thus it is necessary to test for spatial dependencies before regression. Through the study of a deformation data of a viaduct in Shanghai, China, we find that there exists significant spatial autocorrelation in horizontal and vertical directions, and the vertical deformations exhibit especially strong spatial association.
The Method of Surveying Concealment Engineering Control Points ITRF Coordinates Based on Gyro Orientation
Authors: Wu Ji Feng , Yang Zhi Qiang , Shi Zhen , Yang Jian Hua
Published: March 2015

In the modern geodesy and precise engineering surveying, we often choose ITRF reference frame as the measurement benchmark for research. In some special projects, however, it is difficult to directly get the coordinates of points by GPS, and the visibility conditions between points have also been limited. According to this problem, we propose a new method combining GPS survey and gyrostatic orientation technology, to access the ITRF coordinates of control points indirectly, and analysis and research the related important issues.
Human Factor Analysis of General Accidents in Railway Passenger Transportation
Authors: Zhang Jia Wei , Jiang Ping , Niu Cai Yun
Published: March 2015

In recent years, with the development of modern technologies and safety science, catastrophic accidents tend to be avoided successfully. However, general accidents which cause minor loss or casualties still occur occasionally and hence become main part of all accidents. Therefore, to make effective control of general accidents, fault trees are established based on the analysis of historical general accidents. The influencing factors are roughly divided into human factors and equipment system factors. This paper focuses on human factors and the relationships between the factors and general accidents are analyzed using the improved analytic hierarchy process (AHP) and methods of risk identification. The importance of the factors is thus evaluated. Results of the evaluation are helpful to management.
Spatial Correlation Analysis of Geological Disaster and Geological Background in Liaoning Region
Authors: Zhang Qing
Published: March 2015

Liaoning Province is located in the southern part of northeast China,and within two first degree tectonic units,that is,Sino-Korean quasi-platform and Tianshan-Xingmeng geosynclinals fold system,it has complex geological environment,strong natural variability and frequent geological disasters. Taking GIS as a platform,selecting the factors of the stratigraphic,magmatic,tectonic,seismic and geological hazard,and using empirical weighting method,the paper analyzed the spatial relationship of geological disaster and geological background and acquired that Liaohe Group and Triassic is the major geological disaster strata and magmatic rock area is the more developed area of geological disaster,and disaster points mainlydeveloped in the Triassic of the Mesozoic.
Study on Numerical Simulation of Fire and Evacuation for a Supermarket
Authors: Dong Si Hui , Li Min , Lin Yu Han
Published: March 2015

3D physical model of a supermarket was constructed with Pyrosim software, and the fire scene was set according to the actual situation. The fire development process and personnel evacuation process were simulated with FDS. The fire danger time of the fire scene was analyzed according to the smoke temperature and visibility of different time. The personnel evacuation process to the supermarket was simulated with the evacuation software Evac, and the required safety egress time was calculated. By comparing the fire danger time and the required safety egress time, the conclusion was drawn that the supermarket can not meet the requirement for safety evacuation. After changing the conditions for safety evacuation, the required safety egress time was simulated again. And the simulation results showed that the changed evaluation conditions can meet the requirement for safety evacuation. The study results provide a basis to improve the safety evacuation conditions of the supermarket.
Research on the Location Model of Emergency Rescue Facilities in the City Disaster Prevention
Authors: Sun Qing Zhen , Jia Yan , Hou Xiao Ying , Li Peng
Published: March 2015

In order to solve the location problem of the city disaster emergency rescue facilities, it applied the multi-objective decision method to resolve the problem. Firstly it described the types of emergency facilities in the city and proposed the basic principles of the location decision. Then it analyzed the four factors of the location decision, and it established the multi-objective decision model of the emergency rescue facilities location, which based on the integration of traditional location models. And then it used the linear weighted sum law to solve the model, and can readjust the weights of the goals to reach the satisfying plan. Finally, it applied the model to solve the emergency shelter location problem of the new area in the Zhengzhou. The result shows the feasibility and the effectiveness of the model which used the multi-objective decision method to solve the location problem of the city disaster emergency rescue facilities.
An Application of Risk Assessment of Geo-Hazards in Highway Engineering
Authors: He Yong Qiang , Lan Tian Zhu , Bi Yong Hui
Published: March 2015

With the development of our economy, highway becoming more and more important for our lives. While the construction of the highway will cause many geo-hazards such as landslide, Collapse, Debris Flow and loess collapse etc. , based on the highway of S208, the types and character were analyzed in The paper, then their hazards were evaluated, it can be supplied a necessary basement for letter prediction and evaluation and comprehensive zoning evaluation.
Analysis and Calculation of Maximum Operation Speed and Average Distance between Stations for Regional Rail Transit Planning
Authors: Jing Min , Li De Wei , Fu Yi Long
Published: March 2015

Regional rail transit eases downtown residents gathering,improves living conditions,and develops satellite towns.Maximum operation speed and average distance between stations play an important role in transportation efficiency and function orientation.There are no specific specifications for planning regional rail transit in China,and foreign specifications are inapplicable.The paper researches the relationship between maximum operation speed and average distance between stations of regional rail transit,and calculates the matcing values of the two.Taking Beijing R1 line as an example, the paper determines maximum operation speed and average distance between stations through traction calculation and dimensionless evaluation model,and verifies each indicator.Each determined value is consistent with the R1 line planned value by comparing.The research provide decision support for future planning of regional rail transit.
Calculation of Carrying Capacity at High-Speed Railway Stations Based on Route Selection
Authors: Zhao Qian Rui , Zhang Qi , Liu Pei
Published: March 2015

Carrying capacity calculation at high-speed railway stations is closely related to the trains with different types and arriving rules. Traditional method is not feasible to calculate and evaluate carrying capacity at high-speed railway stations efficiently and accurately. Therefore, a method to calculate carrying capacity at high-speed railway stations was presented by establishing a route selection optimization model and designing corresponding algorithm. In the method, the integration concept of calculating carrying capacity was introduced by establishing the relationship between receiving dispatching route and arrival-departure track. An approach was provided to the solution of route selection scheme and calculating carrying capacity at high-speed railway stations efficiently and accurately by considering the differences of trains with different operation modes and operation time. Case study of Jinan West railway station verifies the feasibility of the method. The presented method can provide a technical support for calculating and evaluating carrying capacity at high-speed railway stations in different scenarios.
Modal Analysis of a Wind Turbine Tower Based on the Finite Element Method
Authors: Shan Hong Zhu , Liu Zhen Hua
Published: March 2015

For the low power wind turbine, the tower and the generator unit is easy to produce resonance, which will result in bigger amplitude. In this paper, as an example, the authors establish a finite element model for modal analysis by a 55kw direct-drive permanent-magnet generator, to confirm its inherent frequency and vibration mode. Horizontal amplitude on the top of the tower can be received under different external excitation frequency. The results correspond to the codes very well and can provide effective reference data for the design of the wind turbine tower.
Clustering Analysis of Main Vessel Traffic Flow Observation Lines along Yangtze River
Authors: Tian Yan Fei , Wei Xiao Yang
Published: March 2015

For the reasonable grouping of the 16 vessel traffic flow observation lines along Yangtze River to compare them with each other, essential data of nearly 6 years taken with the mean relative growth rate of traffic flow over the yearly same period set as clustering index, the clustering of the 16 vessel traffic flow observation lines was realized on MATLAB in accordance with the set index based on the basic principle and processes of Agglomerative Hierarchical Clustering Method, which indicated that the observation lines can be divided into 3 classes, and particularly Jiujiang took an exclusive class obviously different from the other two. This work would provide scientific basis of grouping the observation lines in order to reflect shipping economy of the regions where the observation lines are located and to provide reference for management decisions.
Fuzzy Combination Forecasting of Urban Transit Demand
Authors: Mo Yi Kui , Wang Kai , Lv Shen
Published: March 2015

Based on the analysis of the existing forecasting methods of the urban public transit demand scale and concerning the characteristics of urban public transit demand forecasting, this paper introduces the concept of triangular fuzzy number and puts forward the fuzzy combination forecasting methods in terms of political factors. Following that, steps and process to implement the fuzzy combination forecasting are further expounded, and specific examples are adopted to prove the feasibility and validity of the method.
Study on Combinational Scheduling Optimization of Bus Transit Rapid Based on Tabu Search & Genetic Algorithm
Authors: Chang Cheng Zhi , Chen Xu Mei , Wang Meng
Published: March 2015

The goal is to minimize the sum of operating cost and passengers’ travel cost, and establish an optimized combinational scheduling model of Bus Rapid Transit (BRT) combined with regular bus, express bus and shuttle bus. A mixed genetic algorithm based on tabu search algorithm (GA-TS) has been designed after analyzing the fundamental principle of genetic algorithm (GA) and tabu search (TS). A case study has been carried out on the combinational scheduling optimization of a selecting BRT line. By adopting the combinational scheduling model, 5.24% of the total system cost can be saved, which is quite prominent. The mixed genetic algorithm based on GA-TS can optimize the BRT scheduling system, shorten the turnaround time of operating BRT vehicles, effectively reduce the total system cost of BRT and improve decision-making efficiency and service quality.
Nondestructive Test Method for Cement Grouting in Corrugated Pipe Based on Systemic De-Convolution Technique
Authors: Chen Yuan , Han Qing Bang , Cheng Jin , Fan Hong Hui , Yin Cheng , Zhu Chang Ping
Published: March 2015

In order to determine the cement grouting compactness, a new method is proposed for echo signals processing. A model containing four different defects is constructed and simulated using finite element method (FEM). The collected impact-echo signals are processed by systemic de-convolution. It is found that the surface depth of the defect is directly related to the beginning time of the head wave after de-convolution. Using this method, the defect position and dimension can be obtained.
Study on Evaluation of Coordination Degree of Comprehensive Transport System Construction Based on DEA Model
Authors: Wu Ping , Wang Xian Guang , Sun Xiao Nian
Published: March 2015

Due to the problems of long-term irrational traffic structure, uncoordinated transport joins, unsuccessful institutions and mechanisms, China's comprehensive transport system construction is still at an initial stage, the judgment on the construction of comprehensive transport system also lacks a unified standard. Combined with China’s general idea of comprehensive transport development, the key aspects of construction of comprehensive transport system is analyzed, the evaluation indexes of comprehensive transport system construction are constructed by the using of Data Envelopment Analysis model, providing a reference for subsequent work to construct a comprehensive transport system.
Study on the Safety Management System of High-Speed Railway
Authors: Guo Hong Wen , Wei Yu Guang
Published: March 2015

Safety management system is a kind of aviation safety management idea[1]. With the mileage increase of the high-speed railway of China, there is an urgent need to establish a structured safety management system according to its own characteristics, which can ensure the safe operation of high-speed railway. First this paper considers the life cycle of high-speed railway, then learns aviation safety management system, and studies the operation characteristics of high-speed railway, finally this paper establishes the system based on the theory of PDCA、risk management, and the principle of the system. The safety management system of high-speed railway have four modules: the basic module, operation module, supervision module, improvement module.
Quantitative Evaluation for Road-Transport Industry Development Mode Transformation
Authors: Zou Yong
Published: March 2015

The development mode Transformation of road-transport in China is quantitatively evaluated with recent statistical data base on DEA. It is found that the overall level of China road-transport industry is still low after experienced a leap-over development. Further analysis indicates present level of Road-transport industry development mode mainly results from purely technical inefficiency. Moreover, research discover there are significant regional differences in road transport efficiency in China. Comparing with the technical inefficiency and scale inefficiency in western region ,the efficiency level in eastern region is relatively high,Finally, the paper proposes some corresponding measures to promote the efficiency of Road-transport industry development mode Transformation.
Study on the Control of Traffic Congestion Based on Hierarchical Road Capacity
Authors: Wang Dan , Li Bei Lei
Published: March 2015

City traffic congestion control as the core problem in ITS, has been paid more and more attention. This article from the actual characteristics of spatial structure of city to divide different traffic levels is based on the flow of people and vehicles that two variables, which foundation underlies a new model of road capacity that describe and analysis the problem of road capacity from the needs of congestion control. Only in this way can we deepen the understanding over the dynamic traffic flow of city, so as to strengthen the purpose of city traffic network congestion and control.
ANN Forecast Algorithmic Model for Port Logistic Demand Research
Authors: Ji Shou Wen , Li Tang Kui , Chen Guang Ping , Su Gang , Zhang Qin Chuan
Published: March 2015

Port logistics demand is the basis and foundation of port logistics park planning and construction of the port city. Therefore, it has very important practical significance to research the port logistics demand. By input data preprocessing, determine the structure of the neural network to construct reasonable prediction model of neural network, can make a good prediction of the port logistics demand influenced by many factors, to provide the reference for the port planning and decision making.
Numerical Analysis and Experimental Research on the Element-Length Error Sensitivity of the Cable-Bar Tensile Structure
Authors: Chen Lian Meng , Ye Xi Guo , Zhou Yi Yi , Cui Yu Hong
Published: March 2015

According to the element-length errors inevitably existing in the real cable-bar tensile structures, numerical analysis on the element-length error sensitivity was firstly carried out with the help of ANSYS software, where the element length change was simulated by imposing the temperature affection. Then a cable-bar tensile structure model with the diameter of 5.0m was designed and fabricated. The element-length errors were simulated by adjusting the element length and each member in one unit was elongated 3mm respectively to explore the error sensitivity of each kind of element. The numerical analysis and experimental results indicated that different element has different error sensitivity. The error sensitivity of the hoop cables was the most sensitive, the ridge cables and diagonal cables were lower and the struts were the lowest. The experimental results performed almost consistent with the analytical results, which indicated that the proposed error sensitivity analysis method is accurate and the design of the model is effective.
E-Commerce Logistics Distribution Mode Analysis and Decision
Authors: Sun Xue
Published: March 2015

The paper analyzed the current e-commerce logistics distribution modes and their characteristics, put forward the methods of how to select e-commerce distribution modes according to qualitative analysis and quantitative analysis, especially introduced analytic hierarchy process method in mode decision. Finally, a case is provided to prove the feasibility of the methods.
Study of the 3PL Network Planning Layout in a Province Based on Quick Response
Authors: Zou Xia , Li Ji Qian , Li Xuan
Published: March 2015

Starting with the provincial logistics network planning, combined with the quick response theory, to establish two-layer distribution network model of 3PL and tried to establish the method of determining the number and layout of RDC and FDC. At last, simulation study is carried out by taking an example of tobacco logistics network planning in Hunan Province.
Supply Chain Network Optimization Based on Genetic Algorithm
Authors: Hu Xue Mei , Lv Yong Bo
Published: March 2015

In an increasingly competitive global market environment, supply chain competition has become the key content of industry competition in the new period. At present, the real competition is not the competition between enterprises and enterprises, but competition between supply chain and supply chain. While the key of the supply chain competition is the competition of logistics network, an efficient and suitable for logistics network can not only help enterprises to seize market share, but also can greatly reduce logistics costs to improve enterprise core competitiveness. To solve the problems existing in the supply chain network expansion, I use genetic algorithms to make model optimization.
Numerical Analysis of Damage of Precast Reinforced Concrete Structural System Caused by the Effects of Temperature Changes
Authors: Tej Petr , Čech Jindřich , Kolisko Jiří , Bouška Petr
Published: March 2015

This paper deals with the numerical analysis of damage to a precast reinforced concrete structural system caused by the effects of temperature changes. Specifically, the analysis aims to examine the failures in the contact place between the TT panel of the roof structure and the girder. A computer model was created based on the actual construction of the occurring disorders. Temperature changes, which act on the structure, were identified by measurements taken over a long period. The structure was modeled using GiD 11 software and calculated using the ATENA WIN program. The results of the numerical analysis and the manifestations of damage to the actual construction were mutually compared.
Design and Application of Reduced Error Pruning Tree for Traffic Incident Detection
Authors: Liu Qing Chao , Lu Jian , Chen Shu Yan , Li Ya Ping , Yan Xing Chen
Published: March 2015

For aim applied to develop Intelligent Transportation System (ITS), a traffic incident detection method based on Reduced Error Pruning Tree (REPTree) algorithm of decision tree is presented. Different from unpruned decision tree, REPTree model is a fast decision tree learner which builds a decision tree using information gain as the splitting criterion, and prunes it using reduced-error pruning. The detection performance of the REPTree was compared to multi-layer feed forward neural networks (MLFNN) and Radical Basis Function neural networks (RBFNN) which yield superior incident detection performance in the previous studies. The experimental results indicate that REPTree model is competitive with MLFNN and RBFNN.