bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Study Porosity of Railway Ballast during Tamping Process
Authors: Zhou Tao Yong , Hu Bin , Zhao Xue Yu , Yan Bo
Published: April 2014

Tamping operation is an important part of railway maintenance work. The porosity of railway ballast is an important maintenance quality evaluation index during tamping process. In this paper, based on the discrete characteristics of railway ballast, the discrete element analysis model of railway ballast is created using the discrete element method, numerical simulations are performed to study the evolution of porosity of railway ballast under sleeper during tamping process. This paper focuses on the influence of vibration frequency of tamping tines during tamping process; an optimal vibration frequency is obtained from the simulation and compared with the actual vibration frequency recommended by China Railway Large Maintenance Machinery Co., Ltd. Kunming, it is found that the two vibration frequency is consistent. This result verifies that the discrete element method is an effective method to study the evolution of porosity of railway ballast during tamping process.
Research on the Information Management of Maintenance-of-Way Infrastructure
Authors: Pan Xing Chen , Liu Reng Kui , Wang Fu Tian
Published: April 2014

Maintenance of railway permanent way infrastructure plays a vital role in protecting the safety of railway transport. The infrastructure management of railway permanent way rarely involves effective information technology, causing the lack of supplies basis and the difficulty in tracking the relevant information of materials when problems arise in the facilities performance. This article introduced the concept of life-cycle management into the management of maintenance-of-way infrastructure and studied the information coding work on various stages of the life cycle. Simultaneously, the paper discussed how to integrate the resource of facilities and materials with the information management of maintenance-of-way infrastructure in the light of this theory.
Applied Research of the Composite Antiager in Asphalt
Authors: Zou Ling , Zheng Nan Xiang
Published: April 2014

The simulation test system was established to study the performance of the thermo-oxidative aging and ultraviolet aging of 90# matrix asphalt and SBSI-C modified asphalt which were added composite antiager. Mechanism of thermo-oxidative aging and ultraviolet aging of asphalt was also analyzed. The results proved that : indexes of thermo-oxidative aging and ultraviolet aging of 90# matrix asphalt and SBSI-C modified asphalt were improved after adding the composite antiager,and composite antiager had positive effects to resist the aging of asphalt.
Application of Tensile Stress Diagram in Calculating Reinforcement of Surge Tank
Authors: Wang Pan Xiu
Published: April 2014

Suger tank is complicated and its spatial performance is outstanding under loading. When calculate the reinforcement of suger tank, it is should combine the traditional structural mechanics methods with the supplementary finite element method which can consider spatial performance. In this paper, based on the reinforcement calculation principles of non-member system hydraulic reinforced concrete, a 3D model of suger tank was build, and the tensile stress diagram and reinforcement area was calculated by finite element method. The results show that this method is expressive and available in calculating reinforcement of surget tank.
The Effect of Coal Mining on the Multi-Aquifer System
Authors: Lei Jun Qin , Zheng Xiu Qing , Zang Hong Fei
Published: April 2014

Based on the analysis of the regional geological and hydrogeologic conditions of a coal mine in Xishan Coalfield, Shanxi Province in China, the groundwater aquifer system is generalized as a three layers structure in vertical direction and a three-dimensional unsteady flow model in confined aquifer is established. The regime of karst groundwater levels under the coal mining conditions for both Carboniferous and Ordovician limestone aquifers are predicted by using Visual Modflow. The results show that the groundwater levels of the two aquifers are all in decline as a result of coal mining. After 2373 days of mining, the maximum drawdown is 137m in Carboniferous limestone aquifer with the unwatering area in southeast, while the water level in Ordovician limestone aquifer dropped by 8.1m. The dropped rates of groundwater levels in the two aquifers trend to decrease with the coal mining. The results play an important role in the reasonable protection of water resources.
Theoretical Application of Ensemble Kalman Filter to Adsorptive Solute Cr(VI) Transfer from Soil into Surface Runoff
Authors: Tan Chao Qun , Tong Ju Xiu , Hu Bill X. , Yang Jin Zhong
Published: April 2014

This paper mainly discusses some details when applying data assimilation method via an ensemble Kalman filter (EnKF) to improve prediction of adsorptive solute Cr(VI) transfer from soil into runoff. Based on this work, we could make better use of our theoretical model to predict adsorptive solute transfer from soil into surface runoff in practice. The results show that the ensemble number of 100 is reasonable, considering assimilation effect and efficiency after selecting its number from 25 to 225 at an interval of 25. While the initial ensemble value makes little difference to data assimilation (DA) results. Besides, DA results could be improved by multiplying an amplification factor to forecast error covariance matrix due to underestimation of forecast error.
Vortex-Induced Dynamic Response of Submerged Floating Tunnel Tether Based on Wake Oscillator Model
Authors: Su Zhi Bin , Sun Sheng Nan
Published: April 2014

To study the vibration response of submerged floating tunnel tether under the combined action of vortex-induced vibration and parametric vibration, a non-linear vibration equation based on wake oscillator model is set up taking the geometric nonlinearity of tether into account, in which effect of tube on tether is simplified as axial excitation. An approximate numerical solution of planning submerged floating tunnel tether is obtained by applying Galerkin method and Runge-kutta method. The variation degree of mid-span displacement response and axial force of tether is analyzed when the vortex-induced resonance and parametric resonance occur. The results show that, when vortex-induced resonance and parametric resonance occur simultaneously, the mid-span displacement and axial force of tether increase dramatically; the tether sag effect results in the asymmetry of tether mid-span vibration amplitude.
A Quantum Mechanics Study on the Electronic Structure of Impurity-Bearing Sphalerite (ZnS)
Authors: Chen Ye , Chen Jian Hua , Wei Zong Wu
Published: April 2014

A quantum mechanics study on the electronic properties and copper activation of Fe- and Cd-bearing sphalerite (ZnS) has been done using density-functional theory (DFT). Calculated results indicate that Fe impurity introduces the impurity state near the Fermi level and Fe-S bond shows stronger covalent character. Moreover, Fe impurity could not be replaced by Cu atom due to the more stable electronic structure, which results in the reduced copper adsorption amount. For the Cd-bearing ZnS, the Cd-Zn substitution introduces large lattice distortion and the Cd-S bond shows stronger ionic bonding character than Zn-S bond. For Cd-bearing sphalerite, Cd atom is easily replaced by Cu atom, which could increase the Cu2+ adsorption. The experiments of copper adsorption on the synthesized Fe-doped and Cd-doped ZnS samples confirm the simulation prediction.
Downhole Drilling Mechanics Analysis Based on Closed-Loop Rotary Steerable Drilling System
Authors: Yang Yue Xin , Du Yun Pu , Wang Ren Sheng
Published: April 2014

Design of closed loop drilling tool in the rotary steering drilling system is a bit in recent installation guide controlled stabilizer, and placed on the upper drill collar two downhole assembly form of stabilizer. The set of parameters for the MATLAB software programming is used to solve the three moment equation and the downhole assembly mechanical properties. With continuous beam column theory, the mechanics features of the BHA are analyzed. It is analyzed focused on the relationship between the guiding force and the bit deflecting force, the relationship between the hole deviation angle and bit deflecting force, the relationship between the drill press and bit deflecting force, the relationship between the guiding force position on the well inclined plane and bit deflecting force through the tables and figures based on closed-loop rotary steerable drilling system.
Iterative and Non-Iterative Solution of Planar Resection
Authors: Zeng Huai En
Published: April 2014

Planar resection is a common surveying work. The paper introduces its frequently-used solution i.e. the iterative solution. However, the iterative solution needs linearization, initial value of parameter and iteration, unfortunately the initial value of parameter is hard to assess in advance, resultantly, the iteration will fail. Due to inexistence of the above problem, the non-iterative solution based on polynomial resultant or Groebner basis and Jacobi algorithm is presented. A numerical case is given to demonstrate the two solutions. It is suggested for the redundant observation cases that the non-iterative solution should be adopted to assess the initial value of parameter, and then the iterative solution should be employed to compute the final result.
Some New Results on k-Circulant Matrices
Authors: Mei Ying
Published: April 2014

In this paper, we investigate the structure of k-circulant matrices with odd order, and then present some new properties of k-circulant matrices under certain conditions.
Studying a Sort of Special Circumstance of Variance Estimation of Unit Weight
Authors: Deng Yong He
Published: April 2014

When quantity of superfluous survey equals to zero,and sum of residuals squared with weight equals to zero,variance estimation of unit weight is found that it doesnt only equal to zero,but also equals to any plus real number.Then,a sort of imitative example was put forward to support the new conclusion.So,this paper has perfected variance estimation of unit weight based on theory and application in some aspect, and,has solved that,when quantity of superfluous survey equals to zero,we can still assess accuracy based on number.
The Absolute Torsion of Circular Shaft and Neutral Cross-Section
Authors: Luo Qiang , Qin Liang Bin
Published: April 2014

Mechanics of materials are based on the relative deformation to discuss the calculation of the circular shaft torsion deformation, But the relative torsion angle can not reflect the real deformation of a specific cross-section. According to the plane hypothesis, to discuss the absolute deformation of several common shaft withstand the simple torque, defined the neutral cross-section of torsion deformation and given the method to calculate absolute torsion angle, for the rational design of engineering components have a certain reference value.
Failure Analysis of Reinforced Concrete Beams Subjected to Explosion and Post-Explosion Fire
Authors: Zhao Jian Kui , Yan Peng , Gu Bo , Gu Juan
Published: April 2014

In order to investigate deformation and failure of reinforced concrete beams subjected to combined actions of explosion and post-explosion fire, A three-dimensional numerical approach was developed with finite element software ABAQUS. And the numerical approach consists of three steps: quasi-static analysis, explicit dynamic analysis and sequentially coupled thermal stress analysis. The rate-sensitivity and temperature property of material were included in the constitutive model, Fire resistance of reinforced concrete beams subjected to explosion and post-explosion fire was investigated by the method quantificationally. It is demonstrated that fire resistance of reinforced concrete beams is reduced by the action of explosion.
The Compilation of Nonlinear Analysis Program for Externally Prestressed Concrete Beams
Authors: Cai Hui Ju , Zhou Jian Min , Gao Ying
Published: April 2014

In order to popularize the application of external prestressing technique in existing building green retrofits,this paper presents the compilation of nonlinear analysis program for externally prestressed beams based on both the geometrical nonlinearity type and the material nonlinearity type. Combined the static-load-experiment with 12 concrete beams prestressed with external tendons, the calculative results showed that this program matched relatively well with the experimental results.
Influence Factors of High dam Reservoir Basin Deformation Based on Finite Element Analysis and Weights Analysis
Authors: Gu Hao , Huang Xiao Fei , Ding Jing
Published: April 2014

This paper describes the principle and analysis method of reservoir basin finite element calculation. Taking the forked river as an example, this paper illustrates the factors of high arch dam reservoir basin deformation and weight analysis methods through the finite element modeling calculation and analysis of the influence of high arch dam reservoir basin deformation and calculates the weights of impact factors of forked river reservoir basin deformation using the analytic hierarchy process method and then compare in order to gain the conclusion.
Crack Calculation of Beams Reinforced with FRP Bars Based on Linear Bond-Slip Model
Authors: Li Xiao Dong , Feng Hao Chen , Yuan Wei Ning
Published: April 2014

This paper mainly gets a equation of crack width calculation. To get the result, the lineared bond-slip model between FRP bars and concrete is used, combining with the bond stress distribution model which is found by You Chunan. Finally, the value of this paper is compared with the value of ACI440.1R-06 and JSCE code, which prove the result is right.
A Study on the Non-Gaussian Property by the Method of Limiting Streamline
Authors: Sun Xu Feng
Published: April 2014

Under wind action, the property of non-Gaussian wind pressure distribution is very important for determination of peak factor, simulation of fluctuating wind pressure and design of cladding and components. Since the distribution of non-Gaussian zone is highly irregular based on the statistical method, any effort on giving regular non-Gaussian zone regions cant reflect the real non-Gaussian property. Considering the fact that non-Gaussian property was induced by flow separation and generally the movement of vortex showed the character of time averaged steady, taking a typical low-rise building as the example, the distribution of limiting streamlines and the theory of flow separation was applied in the research. Results show that the distribution of limiting streamlines has a close relationship with the intensity of non-Gaussian property and can be used as an intuitionistic tool in the research of identification and mechanism for non-Gaussian properties.
Construction Control Technology of Cable Hoisting System for the Arch Rib of Steel Box Bridge
Authors: Wang Yu , Wei Yan Hong , Hu Gui Fen
Published: April 2014

Mingzhou bridge in Ningbo is a half-through steel box arch bridge with 450m main-span. The bridge adopts welded steel structures except that abutments are made of steel composite structure. High requirements for the bridge construction technology are put forward because of the restrictions including poor geological conditions for bridge site, height limit for aircraft, narrow channel, frequent typhoon. The mid-span arch rib adopts cable hoisting and stayed buckle cable technology for the construction. This paper introduces the construction method during the assembled process of the mid-span arch rib. The numerical simulation analysis for the construction process is carried out. Stress and deformation of the main arch are in a reasonable range, which indicates completing the bridge construction control target successfully.
Construction Technology of one Unsymmetrical Loaded Deep Foundation Pit Adjacent to Expressway Subgrade
Authors: Liu Bo , Xi Pei Sheng
Published: April 2014

One deep foundation pit in Hefei urban rail transit project is adjacent to the existed expressway subgrade, it's in the unsymmetrical loaded state. The control of foundation pit deformation and the safety of subgrade must be strictly ensured. Based on it, the design scheme of supporting system, the construction processes of earth excavation, top beam, concrete support and steel support was introduced. The horizontal displacement of fender piles and the settlement of subgrade was monitored. The field monitoring results indicate, there exists a great difference between the retaining structure deformation under the action of unsymmetrical load and the deformation under the action of symmetrical load, the horizontal displacement of fender piles on the side of subgrade is bigger than the other side, the upper pile appears to be a "drift" towards the lower-load side; although the absolute value of horizontal displacement of fender piles and settlement of subgrade seems to be a big number, the relative value is small compared to the whole length of fender pile and expressway, meeting relevant standard requirements. The deep foundation pit and expressway kept safe and stable in the all periods of construction, no one accident was occurred during that time. Thus, it can be seen that this construction technology is effective in controlling the deformation during excavation, which can provide a reference for similar projects in design and construction in the future.
Construction Project Cost Information Management Research
Authors: Wen Zhen
Published: April 2014

The project cost industry got rapid development with large scale development construction projects in china. The government's management departments of project cost, in order to provide the capacity and level of management, the transformation of the mode of management, strengthening the project cost information service function, implement the informatization strategy comprehensively. But in the country, because of the lack of unified project cost information technology planning, and construction standards, resulted in the formation of many "islands of information". Therefore, the article proposes information management system integration of project cost for the management department of project cost to meet the urgent needs of project cost sharing and using.
Creative Industry Policies and International Comparison in Engineering Design Field
Authors: Zhao Wen Lei , Cao Hong Tao
Published: April 2014

Creative industry will be gained more support from Chinese government in 2014. The paper investigates and compares economic and employment measures of developed countries creative industry. We find that legislation, human capital and ethnic flavor are especially important for creative industry development.
Highway Project Investment Risk Factors and its Mechanism: Empirical Studies Based on Structural Equation Model
Authors: Zhao Wen Zhong , Mu Ling Ling , An Nan
Published: April 2014

For studying the mechanism of the influence of highway project investment risk factors, this paper identify the 12 key potential risk factors. In accordance with KMO test and Bartlet, the test is divided into three sources of risk: the idea of risk management, risk control environment and risk management control, which proposes theoretical models and hypotheses to the cross-bridge. China Railway 12th Bureau 21 units of 125 employees as an object of research, using structural equation model AMOS 18.0 statistics software to verify the theoretical model and research hypotheses. The results show that risk management concept and risk control environment have positive correlation, Concept of risk management and risk management control have positive relationship.There is a positive correlation between risk management and risk management controls. Based on the empirical research conclusion, it puts forward the corresponding countermeasures and suggestions.
Research on Cost Control of Infrastructure Project with Prior Operation Function in Design Phase
Authors: Ke Hong , Gan Shao Fei , Liu Xiu Na
Published: April 2014

Along with the acceleration of market-oriented economy, a number of large infrastructure projects are exposed with some obvious drawbacks. The main reason for the problems mentioned above is that traditional mode of construction and operation, especially in the design phase of the project only focus on investment control, however, ignoring the operational functions. Given the situation that design phase is the key stage to control the cost and functional design, this paper mainly focuses on cost control of infrastructure project with prior operation function in design phase, which is designed to achieve the best match of function and cost in order to improve project value as well as promote sustainable development of infrastructure projects from the perspective through construction investment control organizational model, and value engineering methods.
Research on Important Process of Project Monitoring and Control
Authors: Li Xiao Guang , Wang Li Xia
Published: April 2014

Schedules are management tools. It's important to have a schedule, but it's more important to use it. In this article it is through the proper use of project schedules that management is able to make informed decisions about scheduling activities. This use includes updating the schedules when the schedule information ceases to be useful fort making informed decisions.
The Performance Evaluation of Construction Safety Supervision Based on Evidence Theory
Authors: Wu Hua Jun
Published: April 2014

Aiming at performance evaluation of construction safety supervision of the complexity and uncertainty, D-S evidence theory is presented in this paper to evaluate performance of construction safety supervision, build the index system for performance evaluation of construction safety supervision, and through calculation, the method is proven to be feasible in the performance evaluation of construction safety supervision, effectiveness and suitability.
Analysis of Composite Beam with Different Web Openings
Authors: Liao Wen Yuan , Zhou Dong Hua , Li Long Qi
Published: April 2014

In order to investigate the bearing behavior of composite beam with different web openings. Six composite beams were analyzed by using the finite element program ANSYS and the shape of openings was different. The results show that the shape of opening has a significant influence on the bearing capacity and deformation capacity of composite beams with web openings. Because stress concentration is relatively small, the force performance of circular web opening is more reasonable and has the largest bearing capacity and deformation capacity.
The Research on Railway Construction Project Materials Supplier Selection Model
Authors: Li Ai Min , Wang Guo Qing , Zhang Jing Jing
Published: April 2014

In recent years railway constructions are attracted many large investments, and generally 60-70% percentage of project budget are cost in the materials supplies, which are the main concern of the railway construction projects cost control. In this paper, we do some researches on suppliers choice to investigate the logic of railway construction projects supplies cost control. The structure is firstly to build the indicators of general construction project materials supplier selection, then to find criterion of general construction project materials supplier selection, and thirdly considering the projects distinctiveness to select the line with the actual situation of railway projects suppliers indicators. At last combined all the results of front researches to construct an indicator system for railway construction project materials supplier selection, and further study the supplier selection methods which are based on the indicator system and verified by an example.
Methods of Creation Basis Decisions of Management System Construction Waste Recycling
Authors: Oleinik Pavel Pavlovich , Grigorieva Larisa Stanislavovna
Published: April 2014

Рresents a methodology using which you can simulate evaluate and predict the construction waste management system for different regions
Analysis of Ancient Chinese Architecture Aesthetics
Authors: Zhang Yong
Published: April 2014

the ancient Chinese architecture after two thousand years of development, formed the unique architectural style and aesthetic implication of Chinese traditional culture, this kind of architectural style and aesthetic connotations mainly reflected in the structure of the structure, roof shape, layout and color, etc. Appreciate the ancient Chinese architecture, can give a person very special aesthetic pleasure.
Analysis of China Ancient and Modern Sports Architecture
Authors: Chen Xiao Jie
Published: April 2014

Ancient sports activities have led to the emergence of sports buildings, generally, sites or buildings that for sports activities occur, can be considered sports architecture. Since ancient times, as the sports facilities, sports building development has always been the social productive forces, social and economic affects, the level of science and technology and political culture. Mark the rise and fall of sports buildings but also the historical period of economic level and the national strength. Early human sports activities for the purpose of more hunting prey to survive. With the development of social productive forces, science and technology and cultural level of progress, and social, human sports activities in the political, military, religious, cultural and artistic activities began to closely together.
Isolation Performance Analysis of Concrete-Filled Steel Tubular Composite Structure Based on the Lead Rubber Bearing
Authors: Duan Shao Wei , Tan Xian , Huang Wei
Published: April 2014

With a 6 layer of concrete-filled steel tubular column-steel beam frame structure as the object of study,established finite element model of the structure is based on Sap2000,the traditional structure model and the isolation structure model were compared.The research results show that the dynamic characteristics of structure storey drifts and acceleration with Lead Rubber Bearing are smaller than the model without Lead rubber bearing under different earthquake intensities. The isolation effect is considered obvious.
The Dominant Expression of the Qinling Mountains's Regional Culture in Residential Buildings' Regional Style
Authors: Xiao Zhe Tao
Published: April 2014

Researching the building how to predominantly express the regional culture of the Qinling has important significance. Natural and humanistic environment was analyzed how to influence architectural style along the Qinling’s northern foot, taking Xi’an Garden as example, and how to express regional culture in residential buildings was explored. Some references was gave how to dominantly express regional culture in residential buildings.
The Relation between Sports Building and City Image
Authors: Chen Xiao Jie
Published: April 2014

In the theme park and the mass media programs become more and more stylized today, sports reflect the dramatic value it unpredictable. Sports games and TV can create has shocks the strength of scene, and this "reality" becomes the unpredictable nature of the carrier, it can obtain immeasurable business value and city culture of success. Sports buildings to become the new urban symbol, and obtained the original town hall, only a! J galleries and museums can obtain the attention. From twentieth Century the western city construction development history can be seen, city image and city planning and architectural design has great relevance. But the city image seems are always as city construction activities, products, changes with the design theories and ideas vary products. City image is stuck in the design concept of level of city image building.
Study on Correlation between Housing Construction and Influence of Urban Development in the Succession of Urban Dynamics
Authors: Li Mei
Published: April 2014

Since 1990s housing construction in China has been going through a gradual separation from the planned economy mode, a transition from collective housing construction and distribution to market-oriented mode, which resulted in the all-time growing of real estate development and accelerated the succession of urban development. This article gives an outline of general analysis on correlation of housing construction and urban growth, including its influence on urban economy, social stability, urbanization process, city layout, suburban districts and appearance of residential difference. The article points out the importance and urgency of keeping balance between housing construction and urban development. It points that seeking a balanced way for cities, dwellings and humanity would be the theme and trend of urban housing construction.
Sustainable Urban Revitalization in Historic Districts: A Case Study of Huilongwo Area in Xuzhou
Authors: Liu Qi , Liu Ben Teng
Published: April 2014

With literature searching and site survey, the process of spatial evolution and its current issues are analyzed in Huilongwo area. Then, a planning framework oriented sustainable development is proposed with the actual conditions, and some effective means with green technology are taken into practice. Finally, the experiences of this case are described in the conclusion part.
Talking about the Residential Outdoor Environment Design in the Context of the Aging
Authors: Gong Wen Ye , He Dong Lin , Bai Biao
Published: April 2014

Home-based care for the aged is a dominant endowment type in china. Today, the trend of population aging has become increasingly apparent, corresponding outdoor environment and facilities must be provided in residential community. As Qinghuayuan community of Zhengzhou for example, on the basis of investigation to outdoor environment and the elderly utilization, the author put forward suggestions about walking, leisure and communication to explore the design essentials of outdoor environment in residential area suitable for the elderly.
Lifting Point Optimization of Large Steel Truss on the Principle of Minimum Potential Energy
Authors: Fan Xiao Chun , Chen Hu , Liu Yue , Lv Wei Cang
Published: April 2014

The integral hoisting construction technology of large steel truss has been widely used in the steel structure construction. Based on the principle of strain energy, the feasibility analysis on lifting point optimization of Wuhan public house’s large steel truss was conducted. It expounded the integral lifting construction technology of Wuhan public house’s large steel truss. Through the 12 different methods of lifting point setting and the application of finite element analysis software SAP2000, it discussed the optimization method of hoisting points of large steel truss on the principle of minimum potential energy. It achieved the change rule of the whole strain energy of steel truss. The scheme of 10 lifting points was identified on the economy and construction conditions. The stress state, the structural deformation state and the steady mode was analyzed under the optimum lifting point condition. The results meet the design and construction requirements, and this research method can provide the certain reference value for similar engineering.
Urban Bluebelt Construction – Control Countermeasure of Urban Blue Line (River Project) from Line to the Whole
Authors: Huang Yao Zhi , Lin Lin
Published: April 2014

Since the Administrative Measures of Urban Blue Line being issued, cities compile the Blue Line project in succession, which reflects a series of problems and deficiencies. The simply method to determine the line can not meet the demands of comprehensive development of water body and land function, which causes the guiding function of the project and its construction weak, this is the problem desiderated to be discussed and solved when the compiling the urban Blue Line. This article is based on the current situation of compilation and implementation of urban Blue Line project, introduces the concepts of Bluebelt, Paste Line Rate, put forward the planning control countermeasure combined with Blue Line control and Bluebelt design, build up the Bluebelt network in macroscopic area, use Blue Line to control on meso-level, adjust urban design flexibly on micro-level, in order to provide some valuable reference for the protection and development of urban water network and compilation of Blue Line and related project.
Integrated Civil Monitoring System Based on POSA
Authors: Zhang Huan , Liu Ming , Hu Ding Jun
Published: April 2014

As the rapid development of network communication and multimedia technology,demand of integrated civil monitoring system is increasing. In this paper, an integrated civil monitoring system based on POSA(Pluggable Objects and Services Architecture) is presented. The proposed integrated civil monitoring system can be run on multiple hardware, platforms and operating systems to support distributed computing, to provide cross-network interaction. It also supports standard protocols and quickly access various device interface.What is more, our system can provide transparency applicable or service interaction in different hardware, platforms and operating system.
The Application of Mathematical Statistics in Urban Geography Research
Authors: Ma Xiu Feng
Published: April 2014

In the middle of the 20th century, geography has experienced a number "revolution". statistical occupies more and more important position in the urban geography research. This paper analyzes the application of statistics in the development of the urban geography. And with the method of case study, illustrates the multivariate cluster analysis, regression analysis and other statistical methods in the study of urban geography specific applications
Non Shrinkage Self-Compacting Steel Box Concrete Application in a Landscape Tower
Authors: Li Shu Jin , Xu Xiao Yu , Lu Wen Jie , Fu Yi Gang
Published: April 2014

According to the design and construction characteristics of steel box concrete girder of a large landscape tower, C40 grade non shrinkage self-compacting concrete meeting engineering requirements was produced. The fresh concrete workability, early age shrinkage are researched, construction technology and detection methods are discussed combined with the practical engineering of steel box concrete girder.
Analysis on Historic Landscape Space Configurations and Evolutions of Qijiang Ancient Town
Authors: Li Yuan
Published: April 2014

The landscape spaces of Qijiang ancient town take on special combined characteristics of contrary space sequence. The space configurations are unique and diversiform, particular about the whole harmony between inner and outer environments, human and space. The space-time configurations reflect ordered, blending and continuous in inner and outer landscape spaces. The contrary space configurations experienced more than 2000-year historic evolutions. The landscape spaces have extended continuously and reasonably complying with the combined characteristics of contrary space sequences. But in the late of last century, a lot of the landscape spaces were destroyed. Analysis on the contrary space configurations and evolutions will help us to look for the relationships and rules of the original spaces, and supply references to recovering multidimensional and sustainable ancient environments spaces.
NDVI Changes of the Nansi Lake in Shandong Province of China
Authors: Liang Chun Ling
Published: April 2014

The normalized difference vegetation indexes (NDVI) of the Nansi Lake wetland in Shandong province is are calculated on the basis of MSS, TM and ETM+ remote sensing data collected by the Landsat satellites. The characteristics of seasonal vegetation activity of the Nansi Lake during 1973-2011 were revealed. The seasonal variation characteristics of wetland vegetation in Nansi Lake are not identical in the last 40 years. The NDVI in spring (P=0.0216) first decreased and then increased; The NDVI in summer (P=0.0007) and winter (P=0.0189) present a significant decreasing trend. The variation of the NDVI in autumn is small.
A Study on the Effect of Wind Fences in Reducing Wind Velocity at Fruit Farms
Authors: You Jang Youl , You Ki Pyo , Paek Sun Young , Kim Young Moon
Published: April 2014

Fruit growers install wind fences to prevent fruits from dropping. To examine the effect of wind fences in reducing wind velocity, this study conducted a performance experiment, a farmhouse model experiment, and analyzed how wind fences reduce wind velocity. Among the four types of wind fence with porosities ranging between 30% and 60%, the one with a porosity of 40% showed the highest performance. Findings from the reduced model experiment that used a wind tunnel showed that wind fences with a porosity of over 50% had a wind velocity reduction effect. In addition, the experiment found that the wind velocity reduction rate is affected by the installation distance of the wind fence.
The Reflection and Expectation on Green Architecture
Authors: Pan Lie , Liao Yu Hang , Wang Bo
Published: April 2014

By means of literature review and comprehensive evaluation among most important periodicals and newspapers and conference proceedings, the hot points about green architecture would be collect and analysis. The goals and connections among them would be got clear, and the most authoritative and normative research programs about green architecture would be found.
Let the Historic District Shine Again
Authors: Jia Jian Dong , Wang Bing
Published: April 2014

Sanxuejie, an important historic district in Xi'an. It is currently facing a slow transformation process, poor infrastructure, neighborhood development lags and some other issues, but the most difficult part is the shortage of funds and neighborhood residents transformation underpowered. In this paper, we put forward organic updated strategies with eco-development ideas, and the entire block will be divided into different sections to coordinate with the phased transformation, this kind of transformation stages can raise funds to alleviate the problem of lack of funds, in order to allow the transformation of neighborhoods starting one by one.
Rainwater Collection and Purification Heating Roof System
Authors: Gu Sheng Li
Published: April 2014

The utility of roofs is a focus issue in architecture field. Using roofs to collect and heat rainwater is a reasonable approach. In this paper, a new member that uses glasses and ceramics collect rainwater is introduced. The member is made up of four layers. The glasses are used to collect rainwater and form greenhouses. The black ceramic plates are used to collect sunlight and heat the rainwater. Water vapor is condensed and collected by the bottom ceramic plate. This member with high capacity of collecting rainwater and sunlight absorption is a hopeful roof member.
Research Progress of Composite Thermal Insulation Wall in Hot Summer and Cold Winter Zone of China
Authors: Liu Hong Mei , Wu Cheng Qun , Xu Yuan Bin , Zhu Ai Dong
Published: April 2014

External wall has great impact on building energy conservation. Developing composite wall is direct way to improve the situation of building consumption. In this study, the importance of building energy conservation was analyzed. Several types of composite thermal insulation wall were listed and their advantages and disadvantages were discussed. Self-insulation composite wall has unique superiority, especially in hot summer and cold winter zone. Meanwhile, the application prospect of composite wall with combinations of insulation coating of high reflectivity and silt sintered porous brick was introduced. Finally, combining regional character, some suggestions were proposed on the further development of China’s composite wall in hot summer and cold winter zone.
The Analysis of Adjustment Modes of District Heating System
Authors: Wang Song Ling , Yang Xian Liang , Chen Juan Juan
Published: April 2014

In order to reduce the power consumption of circulating pump in secondary network., the adjustment that combines quantity adjustment and quality adjustment is proposed in the paper;and the control strategy and adjustment equations in different stages of this adjustment mode are present. Then taken a community in Zhangjiakou as an example, the adjustment curve of this mode in indirectconnected heating systems and direct-connected heating systems are obtained. Finally the power consumptions of the adjustment mode proposed in the paper with that of quality adjustment and quality adjustment with different quantitative ratio in each period are compared; the result indicates that the adjustment mode has more potential in energ-saving.
The Economic Performance of Ground-Source Heat Pumps
Authors: Gong Peng , Tang Jian
Published: April 2014

Ground-Source Heat Pump (PSHP) was verified by US Environmental Protection Agency (EPA) as one of the most efficient air conditioning systems on present market. It has a higher efficiency than other heating systems from 50% to 70%, and a higher efficiency than other cooling systems from 30% to 50%. The working principle of PSHP determines its low operating costs. By comparing the total energy efficiency, the existing groundwater heat pump total energy efficiency is the highest, about 115%. The total energy efficiency for soil-source heat pump is up to 100%. But traditional air conditioning is far less than the level. Articles present a research on Ground-Source Heat Pump system and its cost with a scientific and objective principles. Ground-source heat pump is a new central air conditioning system of Low-carbon energy saving. Due to the high technical content, function requirement, and installation difficulty , the average initial investment of ground-source heat pump is much higher than traditional central air conditioning. Taking into account the added costs of heating systems based on traditional central air-conditioning, such as boilers, it will not deviate too much from it.
The Energy-Saving Management System Design of Major Projects in Implementation
Authors: Li Wei , Ma Ming Yuan , Zhang Hong Tu
Published: April 2014

The energy-saving management system of major projects in implementation has always been in a state of imperfect. On the basis of combining energy-saving management status of major projects in implementation, referring to the research results of the management mechanism design theory at home and abroad, this paper aims at the primary interest-related subjects of the major projects energy-saving, uses economic mechanism designing theory and incentive theory, designs the energy-saving management mechanism; It does the theoretical analysis of the government and major projects owner with the complete information dynamic game model, then, provides decision evidence for the government to formulate the rational management intensity and maximize the interests of all parties. At last, the paper provides the suggestions to solve the existing problems of major projects energy-saving management.
Nonlinear Finite Element Method Ultimate Strength Analysis of Open Box Girders
Authors: Vu Van Tan , Wu Wei Guo
Published: April 2014

In this paper, the ultimate strength of open box girders with pure torque, bending moment and combined loads are investigated using a commercial FEA program, ABAQUS. It studies the ultimate strength bending moment of Nishihara open box girders model. This paper mainly analyzes the influence of the ultimate bending moment on the open box girders by the finite element mesh, bounding conditions of the open box girders and the initial deflection.
Experimental Research on Compressive Strength of Pumice Concrete and Volcanic Concrete Wall
Authors: Dou Li Jun , Zhang Min , Xu Ming Yu
Published: April 2014

Pumice concrete and volcanic concrete used in low-rise rural residential building more and more. In order to better realize the pumice concrete wall and cinder concrete wall compressive strength, respectively to make three slices of pumice concrete wall and three slices of cinder concrete wall, wall compressive experiment was carried out. The experimental results showed that the compressive strength of pumice concrete wall and volcanic concrete wall meet the requirements of the bearing capacity of masonry structure.
Influence of Laboratory Accelerated Carbonation on the Properties of Recycled Concrete Aggregates
Authors: Zhao Zeng Feng , Jin Peng Fei , Zhao Qian Qian
Published: April 2014

Very large quantities of construction and demolition wastes and especially concrete wastes are produced yearly. Up to now, only a small fraction of these concrete wastes is re-used as recycled concrete aggregates (RCA) for the manufacture of concrete. In order to make good use of RCA in the concrete, it is very important to study the influence factor of the properties of RCA. In this paper, the influence of laboratory accelerated carbonation on the properties of recycled concrete aggregates has been studied. The results show that after the laboratory accelerated carbonation, the harden cement paste content of RCA measured by salicylic acid dissolution decreases, the density and specific surface area of RCA increase, and the porosity of RCA decreases, which leads to the reduction of water absorption of RCA.
Nonlinear Numerical Study of Cold-Formed Lipped Channel Beam-Columns
Authors: Chen Ming , Feng Zhi Bin , Zhou Zhou , Wang Ya Long , Zhang Qiang
Published: April 2014

Cold-formed lipped channel sections may fail in local, distortional and overall buckling under compression. With the development of computer technology, finite element analyses of these sections play increasing important roles in engineering practice for economic design and time-saving purpose. A kind of typical cold-formed lipped channel beam-column with varying load eccentricity was analyzed in this paper by using the finite element program of ANSYS to observe the buckling modes and load carrying capacities of the columns. All the results can be the reference for further studies.
On Expected Performance of a Frame-Structure Made by All GFRP Pultruded Profiles
Authors: Dal Cin Alessandra
Published: April 2014

The research showed focus on the performance comparison between two equivalent frame structure. i.e. the first one made by steel and the second one by all frp (fibre reinforced polymer ) pultruded material. The structure adopted for the analysis is a traditional two floors frame made by connections between columns and beams. The connection has been assumed rigid to simplify the comparison, already very hard and to point out on the overall structural answer of the two different cases. The reason why of the investigation is related to teh need to deep detail the eventually structural benefits in presence of FRP material. However the success is related to a very reduced weight of FRP material (with weight equal to 1600-1800 kg/m3) linked to a not negligible performance in term of strength and durability, even if also the easy employment play a very important rule. The two storeys frame were subjected to static and dynamic actions to analyse also in comparison the response
Creep Behavior of High-Performance Concrete
Authors: Xiong Xue Yu , Wang Li Jun , Xue Rong Jun , Zhang Sen
Published: April 2014

Realistic prediction of concrete creep is of crucial importance for the safety, durability and long term serviceability of concrete structures. High performance concrete (HPC) contains combinations of various components, such as aggregate, cement, water-reducing agent and other ingredients which affect the properties of the HPC including creep. This paper reviews the accuracy of the conventional concrete (CC) creep prediction models, including B3,GL2000 and CEB-FIP(2010). Further, a new creep prediction model based on the comprehensive analysis is proposed. The improved model was calibrated through a joint optimization of laboratory creep tests. Comparisons of the results of the proposed methold with 76 data points of creep coefficient showes good agreement.