bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence Factors Analysis of CFG Piles Treatment in Highway Soft Foundation Settlement
Authors: Wang Huan , Wang Xuan Cang
Published: January 2014

To reasonably design the layout scheme of CFG piles treatment in highway soft foundation settlement, the influence factors of CFG piles treatment were analyzed and evaluated, based on the FEM model. According to the results, the space between CFG piles has the greatest influence. With the increase of pile spacing, the surface settlement of subgrade increases correspondingly. The settlement differentials of each CFG piles layout scheme are also put forward as a reference to highway soft ground settlement control.
Influence of Moisture Content to the Freeze-Thaw Performance of Roadbed in High-Cold Areas
Authors: Wu Qiao Ling , Sheng Yong , Xie Feng
Published: January 2014

Frost-heave and thaw-settlement of roadbed soil in highway will influence directly the durability, safe traffic flow and construction & maintenance costs in high-cold areas, therefore, recognizing and analysing the common embankment technologies of highway roadbed in high-cold areas accurately is significant to the effective controlling of project invest and the highway construction with limited funds in minority areas. The relations of Moisture Content and the freeze-thaw performances of roadbed fillers, subgrade soil were got respectively by experiments, and the results shows: Moisture Content has larger influence on the frost-heave and thaw-settlement performance of the soil. During the embankment of roadbed, the Moisture Content of fillers should be controlled nearby the optimum Moisture Content. The frost-heave and thaw-settlement occurs mainly in the subgrade soil, controlling the Moisture Content of subgrade soil is very important to improve the up-limit of frozen-soil, keep the stability of frozen-soil, control the thaw-settlement of roadbed and get rid of the roadbed diseases.
Viscoelastic Properties Research of Sisal Fibre Asphalt Concrete
Authors: He Zi Ye , Liu Fu Xue , Lv Feng
Published: January 2014

Asphalt concrete is a typical complex of viscous, elastic and plastic.So the raw materials should be fully considered, such as asphalt, aggregate, filler, etc, when research to viscoelastic. Viscoelastic can influence various properties, even to service life of the road and its performance. Therefore, if can improve the viscoelastic properties, it will have a lot of influence to asphalt concrete. Through to add 0.2% sisal fibre to common concrete to study the viscoelastic properties, this article seek to improve the viscoelastic method, in order to play the role of asphalt concrete better.
Application of Impact-Echo Method in Grouting Inspection in Ducts inside Prefabricated Box Girder
Authors: Kong Cun Zhi , Xu Xiang Feng , Sun Jia Long , Qi Guang Zhi , Cao Yuan
Published: January 2014

Based on basic principle of detection using impact-echo method, in combination with urgent demand of grouting quality inspection in ducts inside post tensioning type prefabricated box girder in bridge engineering, impact-echo method has been used for non-destructive detection of grouting compactness in pre-stressed ducts inside prefabricated box girder. Verification by beating away measuring points shows that the impact-echo method can accurately locate metal corrugated pipes and qualitatively judge grouting compactness inside prefabricated box girder ducts, to allow effective inspection of grouting quality in strands of pre-stressed ducts.
The Load Carrying Mechanism of Plate-Chair Type Retaining Structure
Authors: Su Qian , Zhang Jian , Zhao Wen Hui , Zhang Li Cai
Published: January 2014

The plate-chair type retaining structure, which developed from h type anti-slide pile, has the characteristics of high stiffness and small deformations, and is suitable for subgrade retaining engineering on high slopes. The difficulty is that the landslide thrust distribution is not clear and the action of soil between the front and back row piles is not definite. First, a theoretical method of calculating the earth pressure acting on the structure is presented based on analyzing its carrying mechanism. Then an example is analyzed using the method. Finally, on the base of constructing a three-dimensional numerical simulation model of soil-structure interaction using ABAQUS, a validation and comparison between the theoretical calculation and numerical simulation is carried out. The result shows that the method is simple, safer, suitable for designing and can be used in the similar engineering.
Design and Development of 6DOF Hydraulic Motion Platform for Vehicle Driving Simulator
Authors: Zeng Ji Guo , Liu Jing Yu , Yu Qiang
Published: January 2014

The high-level driving simulators generally involve motion platform. This paper describes the design and development of a 6DOF hydraulic motion platform for vehicle driving simulator. Firstly, the structure and kinematic model of the platform are introduced. Then, the speed characteristics of the hydraulic cylinders by using different positive and negative voltage are studied. Because the cylinder startup time and hydraulic pump pressure will both affect the platform's final position, so a real-time platform control method according the sensor feedback is described. Finally, commonly used control functions of the platform are listed. The simulator and the motion platform run well by using this control method.
Energy Consumption and Emission of Pollutants from Electric Bicycles
Authors: Li Tie Zhu , Qian Fang , Su Chen
Published: January 2014

Electric bicycles (EBs) are now becoming the main vehicles for short-distance trips because of their speediness, flexibility and convenience in many cities in China. However, these benefits come at a cost. This study analyzed the energy consumption and emission of pollutants at every stage of the EB life cycle (production, use, maintenance and recycling) by using Life Cycle Assessment (LCA). The environmental impacts and the energy consumption in production and use were quantified and compared with other competing modes of transport, such as bicycles, buses, motorcycles and cars. The results show that the energy consumption and emissions of pollutants by EBs occur mainly in the use stage, and specifically in the process of electricity production and battery change. The emissions of pollutants by EBs per person per kilometer are several times smaller than the values for motorcycles and cars, more or less equivalent to buses and higher than bicycles.
Study on Emitting Device Improvement and Experiment Based on Reducing Emission Freeze
Authors: Bao Yu , Tian Fang , An Yong Dong , Wang Wei
Published: January 2014

In winter in north of China, vapor in automobile emission will freeze on the wall of emission pipes because of using ethanol gasoline, and outflow onto roads. This is a common phenomenon which not only causes traffic jam and safety problem, but also increase fuel consumption. This paper aims to problems mentioned above to improve emitting system to reduce or eliminate freeze on roads caused by drain water due to combusting ethanol gasoline under the condition of influence original emission system as less as possible. Moreover, technique reference will be provided for practice application through building experiment platform, designing experiment program to analyze experiment results and proofing experiment data to present feasibility of reducing emission freeze.
Test and Analysis about one Kind of HEV
Authors: Xie Huang Sheng , Wang Yue Xin
Published: January 2014

Toyata Prius is the first type of HEV automobile of business quantity produce, after continuous development and improvement, now Prius is the third generation. Controlling strategy is the core technology of saving energy and reducing emission. This article analyzes Prius work principle, through experiments of engine start, vehicle start, full gas pedal acceleration, constant velocity, slide and so on to analyze its operating mode, providing help for control strategy research.
Contrast Test Research on Application of Dry Friction Isolators to Vibration Isolation of Vehicle Electronic Devices
Authors: Hou Jun Fang , Li Rong Li , Yu Guang Chun , Luo Tao , He Hai Wen
Published: January 2014

As regards the reliability of the vehicle electronic devices on the tracklayer getting worse due to severe vibration, isolation theory and mechanical model of the GWF vibration isolator and wire-mesh vibration isolator were analyzed, and the test research on the isolation effectiveness of the two isolators applied to the isolation of the vehicle electronic devices were carried out. The test results show that the vibration source of the foundation of the electronic device is mainly from the structure resonance, and the two dry friction vibration isolators exhibit excellent isolation effectiveness on different roads and at different speed. The wire-mesh vibration isolator shows better performance than GWF vibration isolator on three-dimensional comprehensive isolation.
Analysis of Sight Conditions from Driver Position
Authors: Cihlářová Denisa , Seidler Tomáš , Řezáč Miloslav , Slonka Tomas
Published: January 2014

The aim of this paper is to analyze limitations of the sight conditions from the vehicle, which is caused by construction parameters of the vehicle. It deals with front pillars, its influence on sight conditions and evaluation of sight width according to the active car safety. The first part deals with passive and active safety of vehicles. Next part is the choice of the most common vehicle in The Czech Republic and defining its parameters. Using a mathematical derivation were detected angular values of the sight. The resulting values were then evaluated and analyzed.
Research on the Key Issues of the Civil Communication Resource Management for Urban Rail Transit
Authors: Zhang Jian Xun , Han Bao Ming
Published: January 2014

The civil communication system in urban rail transit network is the one which can provide the passenger value-added service. It can meet underground needs of information service for passengers, and be the alternate means of communication for drivers, equipment maintenance personnel, the stations duty officers, and so on. When the wireless systems for rail transit comes malfunction, the civil communication system can provides smooth information channel for rail transit participants to ensure the safety of personnel and rail transit dispatching.
Research on High Speed Railway Evaluation of the Sustainable Competitive Advantage
Authors: Lv Zhong Yang , Zheng Kang Ning
Published: January 2014

In this paper, in order to improve the high speed railway sustainable competitive advantage as the research objective, systematic analysis of the high-speed railway to obtain sustainable competitive advantage evaluation index, including high-speed railway traffic function advantage, competitive advantage, advantage of positive externality, the Delphi method is used to scientific empowerment of these factors, by constructing fuzzy comprehensive evaluation model, the research conclusion is highway and air passenger is higher than that in high speed railway of competitive advantage
Comprehensive Cost-Benefit Analysis Based on the Performance of Drop and Pull Transport
Authors: Wang Zhan Zhong , Liu Xiao Yu
Published: January 2014

Drop and pull transport is an efficient transportation mode. It brings considerable comprehensive economic benefit for companies, improves the transport efficiency and reduces carbon emissions quantity. In order to evaluate the performance comprehensively, the cost-benefit of environmental indicators are added to establish the comprehensive performance evaluation system of drop and pull transport on the basis of traditional financial evaluation index, the performance evaluation model with time value is also established. The comprehensive cost-benefit of drop and pull transport mode and traditional mode are analyzed by NAV and PVI. Accordingly, the result of the case analysis shows that drop and pull transport brings economic and green effects and has guiding significance to develop drop and pull transport.
Patent-Based Study on Rail Transit Development in China
Authors: Yang Wen Jing , Han Bao Ming , Lan Ya Jing
Published: January 2014

This paper used key word retrieval technology to present the development tendency of rail transit in China from the aspect of patent number, applicants, main patent technology, and find that the number of patent applications is increasing in recent years, and Beijing Jiaotong University is one of the major research institutions. The paper also contrasted the rail transit development of Beijng Jiaotong University and Xinan Jiaotong University, which are among the top four transportation universities in China. Finally, the paper used the IPC classification and retrieval technology and Life Cycle method to present the development tendency in the area of train operation safety and optical information storage, and find that the technology of train operation safety is increasing in recent years.
Study on Transport Lines Configuration of Highway Passenger Station
Authors: Xie Yan , Zhan Bin , Yin Qi
Published: January 2014

This paper is mainly about the optimized configuration about highway passenger station.Firstly it expounds the introduction of the paper.Secondly it uses regression model and object designing model to have a configuration of transport lines. Then it has an empirical analysis which is based on the transport line from huai'an to nanjing and gets the schedule.At last it has an evaluation on the schedules.
Study on Transport Scheme for Easing Congestion in and around Port - Take Colombo Port as an Example
Authors: Liu Xin Meng , Chen Sheng Bo
Published: January 2014

Considering the traffic congestion happened on the roads around Colombo Port, this paper first analyzed the existing problems of Colombo Port. 3 schemes are presented to ease its congestion and comparison is made between them to get the best one. Through this comparison, the scheme that building inland container depots (ICDs) and dock rails is proved to be the best one. Finally, we roughly calculated the cost the road and railway transport in ICDs and draw a conclusion that constructing ICDs can save much money in near future operation.
Dynamic Traffic Network Equilibrium System with Elastic Demands
Authors: Shi Chao Feng , Wang Ying Rui
Published: January 2014

We discuss the dynamic traffic network equilibrium system problem with elastic demands by way of a quasi-variational inequality.We introduce the equilibrium definition with elastic demands based on Wardrops principles when there are some internal relationships between different kinds of goods which transported through the same traffic network. Moreover, we also prove that the equilibrium conditions of this problem with elastic demands can be equivalently expressed as a system of evolutionary variational inequalities. By using the fixed point theory and projected dynamic system theory, we get the existence and uniqueness of the solution for this equilibrium problem with elastic demands. Finally, some numerical examples are given to illustrate our results.
Research on Simulation of Evacuation in the Deep Buried Station of Urban Rail Transit
Authors: Li Dei Wei , Liu Fang Lin , Wang Yue Xin , Zhou Wei Teng
Published: January 2014

For the depth of deep buried station, the safety of the station and passengers should be seriously taken into consideration. This paper analyses the features of deep buried station and the influence of these features to the station safety management. With simulation method, the maximum optimal passenger capacity and evacuation time could be calculated, and bottle-neck in the station design could be found. From the comparison of the outcome between deep buried station and normal station, deep buried stations have longer evacuation time and lower optimal passenger capacity, which should be paid special attention to in the operation.
Research on Link Travel Time Reliability Model Based on Massive Expressway Toll Data
Authors: Wen Tao , Li Chang Cheng , Che Chun Jiang , Zhong Lian De , Xin Xin
Published: January 2014

Massive expressway toll data contained lots of valuable information. However, the skills of mining and analyzing toll data were limited currently. This study explored the modeling method of road network travel time reliability based on massive toll data. Firstly, this study obtained travel time data sample of each link at different months, and analyzed travel time statistical properties preliminarily. Secondly, this study used normal distribution, gamma distribution and Weibull distribution to fit travel time data sample, and different statistical indicators were involved to measure the fitting effect. Fitting results showed that normal distribution for link travel time was more rational and acceptable than the others. Thus, this study established link travel time reliability model, and proposed moment estimation method of calibrating the model parameters. In practical application, the reliability model can be used to judge traffic operating posture for expressway management department, and also can be used to forecast travel time information, to provide valuable reference on decision-making for drivers travel plan or route choice.
Evaluation and Analysis of Botswana Gravel Road Condition for District Transportation Networks Monitoring
Authors: Oladele Adewole S.
Published: January 2014

Gravel roads are majorly affected by deterioration which manifests as loss of gravel materials due to traffic and environmental conditions. District Road Maintenance Managers are faced with competing investment demands to maintain gravel road networks in the best condition due to inadequate intelligent techniques of evaluating the roadway performance. The aim of evaluating the road network performance is to reduce the rate of deterioration so that maintenance interventions could be extended. Road condition data is a precursor for road monitoring and is collected on a periodic basis by road authorities to assist in transportation planning. The primary objective of this paper was to evaluate and analysis the trend of Botswana gravel road condition which best captures the effects of gravel road condition influencing factors. This was achieved by carrying out exploratory statistical analysis. Gravel road condition data were collected through the Botswana Roads Department covering 2002, 2005 and 2008 for Botswana district gravel road networks. The variables required for the analysis were clustered and pre-processed to determine their suitability. The analysis results gave a broad overview of the extent to which gravel road condition trends lend credence to their usefulness in district transportation networks monitoring in Botswana.
The Road Network Density and Spatial Dependence Analysis Based on Basin Scale - A Case Study on Shiyang River Basin
Authors: Wei Wei , Shi Pei Ji , Zhou Jun Ju , Xie Bin Bin
Published: January 2014

Taking Shiyang River Basin as study area, Considering that the road net building is influenced by the industry, structure of resources, the road building policy, the highway net construction policies and the other transport patterns, so a concept of highway dependence-preference index is put forward, which is used to explain the variation between the actually obtained highway net densities and the values obtained by model calculation. The results show that:The density of road network in Shiyang River Basin is outward decay along the center of Jinchang and Wuwei City. The distribution density of road network is zonal shape from the south of Tianzhu county extending to the Jinchuan District, Jinchang City. Social developments of the Shiyang River Basin depend on the road network strongly, with two Counties/Districts in the super dependence or super preference situation, 28 towns in strong dependence or strong preference situation, which accounting for 26.67% of all townships in Shiyang River Basin. The medium dependence or medium preference situation is about 44 towns, which accounting for 41.9% of all counties in Shiyang River Basin. 24 countries/districts are in the less dependent or weak preference, and 7 countries/districts are in the weak dependent or weak preference situation. Besides, the study also found that the counties city center also formed basically a small group of road network, the region and part of key towns may become a potential area of the density of road network development in the future.
Study on the Policy of Chinese Road Passenger Transport Intensification
Authors: Gong Lu Yang , Shi Qiong , Kong Qing Feng , Chen Bo Li
Published: January 2014

In recent years, according restructuring and transformation, the intensification of Chinese road passenger transport industry significantly increases-rising, concentrated market, scientific vehicles structure, expanding companies scale. However, irregular market order, incomplete market competition and pricing system and other issues are still hinder road passenger transport intensification process. This article analyses the urgency of Chinese road passenger transport intensification from three levels, macro, meso and micro. Finally, it provides the idea of intensification of road passenger transport, puts forward three specific targeted policy measures from improving market access/exit and the pricing system and the establishment of appropriate coordination.
The Evaluation of Comprehensive Transportation System in Inner Mongolia Based on Principal Component Analysis
Authors: Zhang Chun Mei , Ma Zhan Xin , Zhai Lu Lu , Cui Xin Yu , Zhao Xiao Biao
Published: January 2014

Based on the relevant data of comprehensive transportation system in Inner Mongolia Autonomous Region from 1990 to 2011, the transport equipment, transport mileage, transport capacity, and the transport share of the total economic output in four aspects are studied. Then we select 13 indicators to build the evaluation of comprehensive transportation system in Inner Mongolia Autonomous Region. Using SPSS17.0 software to perform the principal component analysis could get the evaluation of the development of comprehensive transportation system in Inner Mongolia, which has maintained rapid development in the past 22 years, especially after 2003, higher than previous years. It is in accordance with the current transportation development of Inner Mongolia Autonomous Region, next we verify the feasibility of the Principal Component Analysis (PCA) on transportation problem. The method also has theoretical significance of research on relevant aspects of other areas.
Transit Network Design Model Based on Transport Efficiency
Authors: Zhao Shu Zhi , Liu Hua Sheng , Zhang Xiao Liang , Tian Qing Fei
Published: January 2014

Transit network design is an important part of urban transportation planning. The purpose of this paper is to design transit network considering transport capacity constraint. The aim of the proposed method is to maximize transport efficiency of network. Transport efficiency and routes impedance are defined based on the road restriction coefficient matrix. The k-shortest paths algorithm is applied to search efficiency route and the highest efficiency route is selected to be laid on the road network. Then, station OD matrix is updated considering station capacity. The model is illustrated with data from Siping city, China and results show that the transport efficiency of transit network is highest and meet the correlative design norms. Therefore, the model got a higher practical value.
Study on the Work Specifications of Dangerous Goods' Safety Inspection in Bus Passenger Station
Authors: Jiang Jing Ling , Sun Xiao Nian
Published: January 2014

Based on the study on the bus passenger stations and transportation departments of numerous provinces, the working status of the safety inspection of dangerous goods in China's bus passenger stations is analyzed and the problems in that safety inspection are summarized in this paper. Whats more, work specifications of dangerous goods inspection in the bus passenger station of China are studied and analyzed, and corresponding proposals and measures are proposed.
The Researches on the Current Energy Consumption and Energy-Saving Potential of Beijing Subway
Authors: Wang Yun Mo , Pan Song , Wu Jin Shun , Xu Chuan Qi , Fan Li , Wang Xin Ru , Niu Yang
Published: January 2014

Energy conservation is a long-term strategic approach of economic development. Subway is a most important way of urban mass transit, the energy consumption of subway accounted for a large part in mass transit. Therefore, retrofitting the subway for energy saving is close to the current policy, it can relieve the energy pressure, so it plays an important role on the sustainable development of economy. This paper conducted a survey of Beijing subway energy consumption, and summed up annual energy consumption data of the Beijing subway lines. Based on this research, this paper shows the energy-saving potential of the Beijing subway. Also it lays the foundation of energy saving transformation for subway.
Analysis of Cost-Benefit Ratio for Dual-Load Transportation Using Empty Container
Authors: Li Xiao Niao , Zheng Peng Jun
Published: January 2014

Containerization greatly reduced the expenses of international trade and increased cargo turnover speed. However, there are many empty containers due to the imbalance of trade between the port and many importers or exporters. Currently, loaded containers only carry international cargoes, and very little work has been done on the dual-load transportation of using empty containers to carry regional cargoes. Empty containers carry regional cargoes have a very high profit, but usually with little quantities; most importantly, it is usually the case that we need to detour, in which case, this kind of cargoes is not worth carrying when it cannot make a certain profit. Thus a mathematic model about dual-load transportation of empty containers was discussed in this paper and a cost-benefit ratio (R) is adopted to determine the suitability of carrying regional cargoes using empty containers.
The Integrated Optimization of Container Port Logistics System Resources
Authors: Li Bing , Wu Chun Ji , Cao Jin Xin
Published: January 2014

The container port develops from the traditional loading and unloading transportation to the modern comprehensive logistics industry. Its function has made great extension, however the logistics system needs to be further integration optimization , this paper aims at the present stage of the unbalanced development of port container transportation , the service and coordinated ability is weak , the consciousness of cooperative competition is more poorer , the multimodal transportation is imperfection, the construction of information automation lag and so on, proposing measures to strengthen technological innovation , improve the consciousness of cooperative competition , and improve the level of container transportation services , etc. speeding up the integrated optimization of Container port logistics system resources and give full play to the container port overall advantage ,so as to promote competition ability .
Optimization Research of Berth Allocation and Quay Crane Assignment at Container Terminal Based on the Genetic Algorithm
Authors: Gao Zhi Jun , Cao Jin Xin , Zhao Qing Yu
Published: January 2014

In the operation of container terminal, berth allocation and quay crane assignment problems (BACAP) always prevent the container terminal from reducing time of ships in port and improving utilization of equipment. In this paper, the objective is to minimize total time of ships in port. Some reasonable and necessary hypotheses are proposed. The mathematical optimization model of BACAP based on the hypotheses is established. The genetic algorithm is used to solve the nonlinear programming model.
An Identification Method of Traffic State Inequality for Urban Roads
Authors: Fu Feng Jie , Lou Qi Feng , Wang Bin , Wang Dian Hai
Published: January 2014

Traffic state inequality coefficient, an index characterizing traffic state inequality for urban roads, is presented based on traffic state indexes of intersections and links calculated by traffic flow data collected from fixed traffic detectors. And then it establishes the calculation system for traffic state inequality coefficient of intersections, links and networks and determines the ways to classify traffic state inequality. After that, a case study is conducted using Vissim simulation data reproducing the process and results of the identification.
Flow-Density Relationship for Discontinuous Flow on Urban Street Network
Authors: Wang Fu Jian , Wei Wei , Ma Dong Fang , Wang Dian Hai
Published: January 2014

The flow-density model for discontinuous flow on urban street network under under-saturated condition was studied in this paper. According to the concept of two-fluid theory, vehicles in the traffic stream were divided into two classes: stopped (for traffic signal) and moving. The amount of stopped and moving vehicles was estimated by applying fixed number theory and traffic flow theory. Then the model described flow-density relationship was derived on the basis of the concept of space-mean density. After that, impacts of the parameters in the model on the flow-density relationship are analyzed. Finally, twelve simulated conditions were designed and five critical flow was chosen to test the estimated accuracy of the model. Results show that the maximum and average absolute value of relative deviations between exact density and the estimated one was 10.07% and 6.39% respectively.
Strategies of Three-Dimensional Greening Design in Building Sectors
Authors: Xu Jin Xin , Xue Yi Bing
Published: January 2014

Three-dimensional greening is very useful to improve the quality of urban environment and improve the indoor comfort of building. In this paper, building wall greening and building roof greening are investigated. Also, the design strategies are presented. Furthermore, three dimensional greening constructions, plant selection as well as the drawbacks are analyzed.
The Acoustic Test Report of Three Outdoor Courtyard in Shenyang Palace Museum
Authors: Chen Shen , Zhang Dong Xu , Pan Xin Xin , Cong Yang
Published: January 2014

Scientific community is still lacking of research in sound field characteristics of the Chinese traditional architecture courtyard currently, the author chose three outdoor courtyards sound field in Shenyang Palace Museum as the research object, and firstly used the sound cutting method to do system testing of the important acoustic indicators reverberation time T10 in the Palace courtyard, then placed a dodecahedron sound player as a continuous sound source in the courtyard, test the sound pressure level on the adjacent courtyard, the purpose is to analyze the sound privacy degree of the inner courtyard of the Palace. The results may help to understand the sound field characteristics of the palace courtyard, and lay a solid foundation for the future research.
Research on the Light Design for the Enclosed Target Lane
Authors: Zhang Guang Wei , Zhang Xin Ting , Cao Miao
Published: January 2014

The light illumination for the enclosed target lane is designed in the paper. The visual sensing factors reflecting the illumination system are found out and the specific system targets are determined according to the human eyes’ Physiological structure and visual features. The illumination systems for the target surface and inner of the target lane are designed. The illumination mode can be adjusted properly based on the optical aiming devices and mechanical aiming devices, which can make shooters feel the natural light environment comfortably to achieve the optimal condition of the human-and-gun matching.
Slits' Effects on Sound Insulation for Lightweight Partitions
Authors: Huang Xian Feng , Shi Quan , Zhu Chen Hui
Published: January 2014

The slits on the lightweight partitions have a significant effect on sound insulation which is investigated in this paper. According to Gomperts model for rectangular aperture, the sound reduction index of a wall with slits can be predicted. Two lightweight partitions were selected to analyze their sound reduction index variation with factors such as width, length and location of slits. Results show that these factors affect the sound insulation evidently, especially at high frequencies.
Case Study of Three-Dimensional Optimization Design on Architectural MEP Based on BIM
Authors: Lv Xiao Biao , Liang Zi Jian
Published: January 2014

MEP (Mechanical,Electrical,Plumping) includes vast amount of equipment types and pipelines in the integrated design, leading the coordination of MEP design optimization a major challenge for complex buildings. This document explains the technical processes and characteristics of the three-dimensional MEP design optimization based on BIM(Building Information Modeling), connected with the case of the integrated pipeline optimization design practice of a hospital building. Though establishing the BIM model of four-space underground pipeline network system in a hospital outpatient building, we carried out MEP collision checking, obtaining three-dimensional spatial information 102 collision points. Combined with manual screening we finally identified 67 valid point of conflict, for the construction of secondary pipeline network optimization design. In particular, the suggestion on the promotion and application of BIM-based building MEP design to municipal pipeline network in the future is proposed.
A Middleware of IoT-Based Smart Home Based on Service
Authors: Yan Yan , Xu Zhi Fang , Zhu Xun
Published: January 2014

This paper presents a Middleware of IoT-based smart home, which based on SOA (Service Oriented Architecture) and overcome the problems of sharing family service information and integrating heterogeneous systems. The middleware tries to form a system framework, which is workable, easily integrated, SOA-based loose coupling and conformed to the standard of family service information exchange. In this framework, the middleware, who plays the role of family service bus, becomes communication component of family service that based on SOA infrastructure, supports services, messaging, and web-based services interaction in heterogeneous environment, finds and discovers required web services through service registration and repository. Each business application distributes loosely coupled based on SOA integration framework, exchanges data and driven events via smart home middleware, provides more good flexibility and faster response for changes of business needs.
Test Study on the Influence Caused by Superfine Coal Ash to Slump and Strength of Regenerating Concrete
Authors: Zhang Xun Zhong , Wang Ru Heng , Jia Bin
Published: January 2014

This text analyzes and researches the influence caused by superfine coal ash to slump and strength of regenerating concrete through orthogonal test in which three kinds of continuous grains regenerating aggregate are put in. The test results state that, no matter in which graduation of regenerating concrete, stre
A Mixed-Mode Fracture Criterion for Brittle Materials
Authors: Li Ming Tian , He Jun Lian
Published: January 2014

The inclined surface cracks are under the mixed mode I,II,III loading conditions. Direct tension experiments of brittle materials with surface crack have been carried out. The crack growth process, fracture pattern and the initiation angle of the surface crack were attained. In order to analyze the mixed-mode fracture criterion of the surface crack in brittle materials stress intensity factor of the crack front of the surface crack was calculated based on the FRANC3d firstly. And then the minimum strain energy density criterion, the maximum circumferential stress criterion and the revised maximum circumferential stress criterion were used to calculate the initiation angle. The revised maximum circumferential stress criterion proved to be fit for the attained experimental results.
Different Replacement Rate of Recycled Aggregate Concrete Research
Authors: Han Jian Qiang , Pei Ya Hui , Tian Chun Fang , Wang Yu Nan
Published: January 2014

This article mainly research on different replacement rate of recycled concrete at home and abroad are summarized , and expounds the various researchers in the research of recycled concrete. Outlines the basic properties of recycled concrete, and explain the effects of replacement ratio of recycled concrete, for the development and application of recycled concrete are proposed.
Various Replacement Rate Experimental Study on Recycled Concrete
Authors: Han Jian Qiang , Yang Na , Fu Xiu Yan
Published: January 2014

Through summarizing and analyzing the domestic and foreign research different replacement ratio of recycled concrete, summarizes the basic properties of recycled concrete with different replacement rate, experimental study on the compressive strength of concrete, explains the replacement rate of recycled concrete, provides the reference for the development and application of recycled concrete.
Mechanical Properties of Stone Masonry Mechanical Properties
Authors: Han Zhong Kai , Liu Ming , Gao Yin Jun
Published: January 2014

The research presented the mechanical properties under compressive loads of a natural stone masonry. The characterization of the basic materials and different stone masonry prisms are included. Sandstone and low strength limecement mortar were used for this experimental work. The morphological characteristics of walls were also taken into account, in order to manufacture prism specimens that were as representative as possible of the Chinese typology. The experimental values were compared with the analytical in different masonry.
Experimental Study on Flexural Behavior of Damaged Reinforced Concrete Beams Strengthened with CFRP
Authors: Jia Bin , Xue Jin , Mo Jun , Zhang Chun Tao
Published: January 2014

Abstract. In the view of the project problem that concrete strength grade is lower than C15in reinforced concrete beam, we consider a composite technology strengthened with CFRP, and do some monotonic loading experiments on these beams with eight different methods, and discuss the beam force behavior including ultimate bearing capacity, failure model and crack propagation. This paper finds out that the composite reinforced scheme, which with ticking trough, planting steel displaces concrete and gluing and then pasting CFRP, has a remarkable improvement than pasting CFRP immediately, and that there is a high coherence workability in the old and new concrete, so we can give full play to their role as the CFRP high strength.
Experimental Study on Flexural Capacity of Prestressed RC Hollow Slabs Strengthened by CFRP
Authors: Jia Bin , Zhu Shao Tie , Liu Xiao
Published: January 2014

Based on the experiment of prestressed concrete hollow slab flexural capacity, it obtained CFRP prestressed concrete hollow slab Ultimate bearing capacity, failure mode and load - displacement curve, and analyzed the influence of Mechanical performance and reinforcement effect caused by the paste way and paste amount of CFRP. Based on the test results to determine the most optimal paste way and paste amount of CFRP for the different damage (slight damage, moderate damage and severe damage) prestressed concrete hollow slab to meet their safety requirements.
Research on Mechanical Properties of Reinforced Concrete (RC) Beams for the Corrosion by Sea Water
Authors: Zhou Xia , Yan Xi Kang
Published: January 2014

By way of the soaking and drying cycle test on the different mix proportions vertical section of 10 pieces of RC beams suffered artificial sea water (ASW) corrosion under0,35,70,105,140 times of dry-wet cycles, the compared result of exerting pressure test of these beams under simply supporting were investigated. The law about the changes of the mechanical performance for RC beams with different mix proportions under different time periods for suffering corrosion of dry-wet cycles was as follows: The resistibility to ASW corrosion for the concrete specimens with various water cement ratio (various initial strength) are different;The characters of normal section failure for RC beams attacked by sea water are about the same as that for ordinary RC beam; Along with the extension of the time for seawater attack, the bearing capacity for normal section of RC beams varies wave upon wave. The specimens attacked by seawater for about 35 times of corrosion cycle achieve minimum bearing capacity. KEYWORDS: reinforced concrete beam; sea water corrosion; bearing capacity;
Influence of High-Temperature Curing on the Properties of the Concrete Containing Ground Iron and Steel Slag
Authors: Li Meng Yuan , Hu Jin
Published: January 2014

The influence of high-temperature curing on the compressive strength and chloride permeability of the concrete containing ground iron and steel slag (GISS) was investigated. Under standard curing condition (20°C), the early-age compressive strength of the concrete with GISS is much lower than that of the pure cement concrete. The activity of GISS is more sensitive to the increase of curing temperature than that of cement. The increase amplitude of early-age strength of the concrete with GISS is much greater than that of the pure cement concrete by increasing curing temperature. Increasing curing temperature tends to decease the late-age strength and enhance the late-age permeability of concrete. The negative effect of increasing curing temperature on the late-age properties of the concrete with GISS is smaller than that of the pure cement concrete.
Research on the Cement Matrix of Super Toughness Fiber Concrete
Authors: Zhang Xiao  Ping , Sun Chang Zheng , Chen Qian
Published: January 2014

To research the mixing proportion of super toughness fiber concrete pavement materials, different cement sand ratio, and different fiber content super toughness of fiber reinforced concrete material were studied. The results showed that the characteristics of the cement matrix directly determined the magnitude of the fiber effect. With sand cement ratio of 2.5, the method of the extended mixing time, made the fiber dispersion, and thus enhanced the cohesive force. The effect of fiber volume content of 7d is larger than the effect of 28 days.
Laboratory Investigation on the Strength Characteristics of Cement-Treated Base
Authors: Ismail Amiruddin , Baghini Mojtaba Shojaei , Karim Mohamed Rehan , Shokri Foad , Al-Mansob Ramez A. , Firoozi Ali Asghar , Firoozi Ali Akbar
Published: January 2014

Cement-Treated Base (CTB) is a non-conventional method used in road bases materials to improve its engineering properties due to the hardening of cement when moisture is present and extends the period of curing times. This study investigates the effects of cement additive on properties of base layer using laboratory mechanistic evaluation of stabilized soil mixtures. Laboratory tests conducted were Unconfined Compressive Strength (UCS), Indirect Tension test for Resilient Modulus (ITRM) and Flexure Strength (FS) tests. The results revealed that by adding Portland cement, the mechanical properties of the mixture have improved where the UCS is found to be an important quality indicator. In addition, the variables that influenced these tests, which are cement content, curing time, moisture content, and dry density, play important role to determine the performance of CTB. This paper presents the finding of a correlation conducted to analyse the influences of these variables using regression and ANOVA to establish significant models with the aim of predicting the strength base on mixture parameters. Keywords: Cement-Treated Base, Unconfined Compressive Strength, Indirect Tension test for Resilient Modulus, Flexure Strength, Moisture Content, Dry Density, Regression Analysis.
Experiment Study on the Compressive Strength of Combined Aggregate Concrete
Authors: Nie Hua Cheng , Zhang Yan Kun , Zhang Biao , Shen Shao Jie , Fan Jiang Xing
Published: January 2014

Base on the experiment, the cube compressive strength of the combined aggregate concrete is studied in the paper. The results show that the strength of combined aggregate concrete increases with the decreasing amounts of lightweight aggregate, and the water-cement ratio and the replacement ratio of lightweight aggregate are the main factor on the strength of combined concrete. According to the experiment results, the formula of the compressive strength of combined concrete is given.
Control Technique for Osmotic Organosilicon Anti-Corrosion Measurementon the Surface of Concrete Structure
Authors: Gao Xin , Xiong Jian Bo
Published: January 2014

the protective mechanism of organosilicon coatings are elaborated, which osmotic organosilicon protective coating on concrete surface has been proved to realize surface modification of concrete,transferring near surface concrete into hydrophobicity and enhancing the impermeability of concrete structure effectively. Normalized technology and quality control can guarantee the purpose of increasing the expected life service of the concrete structure.
A Study on the Energy-Saving Evaluation Index System of Rural Residential Buildings
Authors: Li Hui Min , Wang Ao Jun , Yin Sheng Xing , Sha Meng
Published: January 2014

Currently, energy-saving building is a hot topic in society, which is also generally recognized as the most direct and effective way with the greatest potential for energy saving in the industry when the energy problem has become increasingly urgent today. At present, the domestic scholars less focus on rural residential energy saving, so the energy efficiency assessment on countryside buildings is still a relatively new field. This paper introduced existing energy-saving building assessment system at home and abroad through referring to the domestic and overseas existing assessment system, combining the characteristics of energy efficiency of rural residential buildings in China, constructed the energy-saving evaluation index system of rural residential buildings. Expert opinions and analytic hierarchy process (AHP) were used to determine the index weight, and the rationality of the evaluation system was determined by an empirical analysis case.
Optimization of an Invention Based on a Force Multiplier Mechanism for Wave Power Generation
Authors: Aparisi Javier , González Jose , Hernandis Bernabé
Published: January 2014

The development and exploitation of new sources of clean energy that do not depend on traditional sources based on the use of fossil fuels, is the focus of this research, which starts with the optimization of an invention capable of transforming a reciprocating rectilinear motion into continuous circular motion in a very efficient way, to be used in the development of a Wave Energy Converter (WEC), capable of operating with low wave height and taking advantage of the oscillating movement of the waves both when rising, and when lowering, unlike other similar devices that harness it only in one way.
A Study on Integration Design of Solar Hot-Water Systems in High-Rise Residential Buildings
Authors: He Jiang , Liu Hong Juan , Luo Yan Wen
Published: January 2014

This paper analyzes surveys of domestic hot-water use in three Chinese cities (Shanghai, Hangzhou, Guilin). The survey results reveal that the ratio of solar hot water in domestic hot-water uses is less than 20%. Use patterns of hot water are different from different seasons and locations. This suggests that the amount of daily hot-water consumption should be determined by local climatic and economic conditions. From successfully-completed construction projects, the integrated design guidelines for high-rise residential buildings are also provided in the paper.