bluuebunny/crossref_metadata_2025 huggingface dataset:
Test Research of Thermal Insulation Property of Straw-Based Board
Authors: Liu Yan , Li Juan
Published: March 2013

A new green building material has been studied through investigating the thermal insulation properties of board produced from crop straw in this paper. Three straw-based boards with different thicknesses (8mm, 16mm and 32mm) were selected to detect heat transfer coefficient of the wall using JW-III heat-flow meter type thermal conductivity tester. Based on the standard specified in [1], we obtained the minimum thickness for the straw-based board for thermal insulation of different thickness brick walls.
An Experimental Study on the Compressive Behavior of CFRP-Confined High- and Ultra High-Strength Concrete
Authors: Vincent Thomas , Ozbakkloglu Togay
Published: March 2013

It is well established that external confinement of concrete with fiber reinforced polymer (FRP) sheets results in significant improvements on the axial compressive behavior of concrete. This understanding has led to a large number of experimental studies being conducted over the last two decades. However, the majority of these studies have focused on normal strength concretes (NSC) with compressive strengths lower than 55 MPa, and studies on higher strength concretes have been very limited. This paper presents the results of an experimental study on the compressive behavior of FRP confined high- and ultra high-strength concrete (HSC and UHSC) with average compressive strengths of 65 and 100 MPa. A total of 29 specimens were tested under axial compression to investigate the influence of key parameters such as concrete strength and method of confinement. All specimens were cylindrical, confined with carbon FRP and were 305 mm in height and 152 mm in diameter. Results obtained from the laboratory testing were graphically presented in the form of axial stress-strain relationships and key experimental outcomes are discussed. The results of this experimental study indicate that above a certain confinement threshold, FRP-confined HSC and UHSC exhibit highly ductile behavior. The results also indicate that FRP-wrapped specimens perform similar to concrete-filled FRP tube (CFFT) specimens at ultimate condition, however notable differences are evident at the transition region when comparing stress-strain curves.
Compressive Behaviour of Recycle Concrete Cubes after Freeze-Thaw Cycles
Authors: Long Tao , Dong Shi Hai , Cui Shi Ming , Wang Qing Yuan
Published: March 2013

It is widely considered that crushed construction aggregate waste creates a lower compressive strength kind of concrete. This paper presents experimental investigation on axial compression strength of 18 recycled aggregate concrete cubes under the freeze-thaw test. The research has focused on the effect of the freezing-thawing test on the ultimate carrying capacity of recycled concrete cubes with different coarse aggregate replacement ratio. This study confirms that freezing-thawing cycles have a greater effect on the ultimate bearing capacity of recycled concrete cubes. Some measures should be taken to prevent the recycle concrete from the freeze-thaw damage, for example add air entraining agent to concrete.
Mechanical Behaviors of HDPE Fiber Reinforced Cement Mortar
Authors: Kamsuwan Trithos , Amornsakchai Taweechai , Srikhirin Toemsak
Published: March 2013

In this dissertation, we studied the mechanical behaviors of HDPE fiber reinforced in cement mortar. One of our major concerns is to study the utilization of high strength high density polyethylene (HDPE) fibers obtained from different draw ratio melt spinning processing. Another major concern is to compare these fibers in term of mechanical behavior reinforced in cement mortar. We began with the material characterization, which mainly include different draw ratios with two sets of rollers through a glyceral bath set at 113°C. Draw ratio was calculated from the ratio of the speed of the follower to leader roller. The latter studies largely used three different fiber volumes fraction ratio tested mechanical properties of cement mortar by using the universal testing machine follow on ASTM standard testing. Subsequently, we studied the behaviors of HDPE fiber reinforced in cement mortar, which mainly include the flexural, tensile and compression strength. The development of mechanical strength of cement mortar when added with these fibers were presented characterize of cement mortar.
Preparation and Experimental Study on a New Type of Exterior Wall Putty
Authors: Zhang Guo Liang , Mo Li Wei , Sun Jia Ying , Chen Jian Bin , Liu Jun Zhe
Published: March 2013

With the rapid development of construction industry, the amount of architectural coatings, especially exterior wall coatings, is growing year by year. However, more common problems of construction quality arise with the increase of project amount. Exterior wall putty is leveling material of the protective layer, and putty fitting for external thermal insulation system should have a high bonding strength, good performance of crack resistance and excellent resistance to water. The basic material in this paper is cement and coarse whiting, talcum powder and quartz powder are the fillers. Then the basic mix of putty will be got through orthogonal experimental design. In order to improve the performance and research inorganic materials and associated auxiliary for external wall putty performance impact, pasty exterior wall putty can be prepared through mechanical mixing and by adding some relevant inorganic materials and auxiliaries. Results indicate that this kind of exterior wall putty is easy to burnish the powder and have good performances of workability, water resistance, high bonding strength and dynamic crack resistance. Which has better performances than that sold in market, especially for the performances of bond strength, dynamic crack resistance and water absorpution.
Synthesis, Properties and Engineering Applications of Green Energy-Saving Slump Retaining Agent
Authors: Guo Xin Qi
Published: March 2013

Introduce a green energy-saving slump retaining agent synthesis process, the slump retaining agent on IR characterization molecules ，which structure and design of the basic ideal molecular structure match.Test results show that：When Point-S polycarboxylate superplasticizer slump retaining agent complex mass ratio of 1:0.2, 2h slump when the variation amount is 30mm, to prevent the excessive concentration of concrete hydration heat, reduce cracks in concrete.The slump retaining agent complex products in Ping An International Financial Centre C60 successful application of self-compacting concrete.
Using GFRP to Develop the Mechanical Performance of Structural Insulated Panels
Authors: Jing Meng , Raongjant Werasak
Published: March 2013

As an energy efficient means of construction, structural insulated panels (SIP) are now widely used in the world. In this paper, Glass Fiber Reinforced Polymer (GFRP) sheets were used as strengthening materials in the SIPs to develop the mechanical performance of it. Eighteen specimens were constructed. Six of them were normal SIPs used as control specimens while twelve specimens were SIPs with different GFRP sheets pasted between face boards and foam cores. Compressive and flexural test programs were conducted to provide a basic understanding of the mechanical performance of this new kind of SIP panel system. The results showed that, the new kind of SIP materials behaved better load bearing capacity and better ductility.
Experimental Study of Asphalt Mixtures Containing Polyolefin/Ethylene Copolymer Modifier by Dry Process
Authors: Yin Hua , Zhu Yao Ting
Published: March 2013

This paper presents a laboratory test to characterize the pavement performance of asphalt mixture containing polyolefin/ethylene copolymer modifier. The modifier is directly added into mixture like aggregates and is not necessary to modify the asphalt binder firstly, which is different with conventional modifier and is so-called dry process. Based on the aggregate grade of AC-13 mixture, the mechanical properties of polyolefin/ethylene copolymer modified hot mixtures asphalt (dry process) were studied by experimental tests, which include the high-temperature stability and water stability. The test results indicate that compared to the SBS asphalt mixture the dynamic stability and TSR improved 66% and 2.3% respectively, when the addition of RK300 is 0.3%.
Disturbance Effects by Excavation of Neighboring Roadways in Deep Coal Mine
Authors: Xiao Long Ge , Shi Kai
Published: March 2013

Numerical simulation method and on-site dynamic monitoring are used to study a railway laneway disturbed by excavation of neighboring roadways under high in-situ stress in a deep coal mine of Huainan region. The paper presents a series of variation trend about stress state, deformation, plastic zone and tension of cables under disturbance effects based on the simulation results, and the evolution of surface displacement of railway laneway is also discussed according to on-site monitoring data. The analysis shows that disturbance effects have spatiotemporal characteristics and support structure should be installed in a short time which helps to reduce disturbance by construction of adjacent caverns.
Research and Benefit Analysis on Exterior Mesh Construction Technology of Super Cross-Section CFST Cylinder
Authors: Yao Chuan Qin , Bai Xue , Bai Rong , Wang Chao , Ma Hai Bing
Published: March 2013

Based on the project on F2-4 plot of Pearl River New Town in Guangzhou City, manual plastering protective layer construction technology of exterior mesh for super cross-section CFST cylinder is fully studied in this paper, the proposed new technologies of outer tube mesh and dry mesh are qualified with fast construction, energy conservation and environmental protection, low cost for later maintenance and so on. The new technology has good prospects for development and can be promoted widely.
Application of Bridge Construction Control Based on Gray System Theory Modified by Kalman Filtering Method
Authors: Luo Zuo Long , Song Yi Fan , Wang Chun Sheng
Published: March 2013

The gray system theory modified by Kalman filtering method is used in the inconsistent between the observed and theoretical values of the segment’s deflection in bridge cantilever construction process. Firstly, get the statistically optimal estimatations of the observed value using Kalman filtering theory, then making it as the initial value, the gray system theory is used to predict the deflection of the next segment, and the formwork elevation of next stage is fixed. As a project example, a prestressed continuous girder bridge in Zhongshan City, Guangdong Province is put forward, respectively using the gray system theory and the gray system theory modified by Kalman filtering method to predict the deflection. According to the comparison from above two methods as well as the closure precision, the conclusion is the gray system theory modified by Kalman filtering can be more effective to reduce the deviation of observed and theoretical values, that means a better bridge linear control.
Effect Analysis on Foundation Pit Excavation Adjacent to Existing Railway
Authors: Yang Yi , Zhou Jun
Published: March 2013

Traffic safety in existing railway has strict demands to the subgrade deformation, and the subgrade deformation caused by foundation pit excavation should be under the limit value. In this paper, steel sheet pile cofferdam supporting system is introduced, as well as its construction process. 2D numerical simulation is adopted to simulate the construction process, the deformation of subgrade at different cases are discussed. At last, the field monitoring data is provided to verify the validity of supporting system and numerical simulation results . Research results indicate that steel sheet pile cofferdam supporting method can well control the subgrade deformation, and can be took as a precedence technique in similar engineering. To ensure the traffic safety, it’s necessary to prevent the trains crossing near the excavation, and the train speed should be limited.
The Research of the Application of Energy-Saving Technique in the Buildings Rebuilt Project in Germany
Authors: Bo Pan
Published: March 2013

In the current situation, old building energy-saving rebuilding is becoming an important part of urban construction. This article summarizes the application of energy-saving technique in old building rebuilding in Germany, and particularly introduce one real project in north Germany. Chinese architects should learn some Germany successful experiments, and devote themselves to our own problem of the old building energy-saving rebuilding.
Features of Architecture and Construction about Traditional Residential House in Shanxian of Henan
Authors: Li Hong Guang , Liu Yu Qing , Gao Chang Zheng
Published: March 2013

Through introduction to five cases of traditional residential house of Shanxian at Henan in China, the writer wanted to define it’s characters and features in architecture and construction. They were deferent to other traditional residential house in Henan. From analysis to the reasons and conditions, this paper try to call for more deep research to focus them.
Mystification Housings Based on Mystification Cultures - Study on Mosuo Folks Housings in China
Authors: Li Meng Bi , Tang Xiao Xiang , Fan Hua , Li Zhe Kun
Published: March 2013

A mystification culture and the mystification housings of Mosuo Folks in the southwest of China were studied. The paper pointed out a family house will influence or be influenced by the culture, history and consuetude. A family house can record some important information and a nationality history. It is significant and necessary to research and protect any nationality housings that are human rare properties.
NanoArchirecture and Sustainability
Authors: Fouad Faten Fares , Ibrahim Mohamed Abdelall
Published: March 2013

Nanotechnology is one of the most important key technologies of the twenty-first century while its economic impact is another subject to be recognized. Nanotechnology is an enabling technology that opens new possibilities in construction sustainability. NanoArchitecture leads to more Ecological Architecture, Smarter Architecture and zero carbon architecture through using nanotechnology, and nanomaterials. New materials are being discovered and developed everyday as a result of investigating ways to achieve molecular and atomic precision in engineering of materials. These new materials present new opportunities to solve problems related to energy in building (consumption and generation), or water treatment and air Purification….. As a result, NanoArchitecture has the ability to meet accepted environmental performance criteria and effects of global climate change.
Research on Self-Updating Mode of Rural Housing
Authors: Liu Shu Hu
Published: March 2013

Based on the characteristic of rural construction, this article frame of self-updating mode to change the environment of villagers quickly, and to discuss new method for new rural construction.
Shanxi Datong Mosse Memorial Hospital – Beautiful Scenery on the Northern Boundary
Authors: Liu Yan Fen
Published: March 2013

By reviewing the construction background of Datong Mosse Memorial Hospital, organizing its building functions, and analyzing the building elevation, this paper tries to illustrate the perfect combination of locality and building functions reflected by this architecture which is the excellent example among modern buildings in Datong and has enlightenment significance for modern design of hospital buildings.
Comparative Study on the Main Elements of Urban Design Control Method
Authors: Lu Lu , Gao Jing
Published: March 2013

Urban design control methods play a key role in the modern urban development. In this paper, three main elements of urban design--architectural form, color and space texture are studied to compare the control methods of three countries: the United States, Europe and Japan. At last, it proposes the improvements of the control methods for Chinese urban development.
Reliability Analysis of Foundation Pit Based on Response Surface of Support Vector Machine
Authors: Sun Chang Ning , Cao Jing , Liu Hai Ming , Zhao Hui Min
Published: March 2013

Traditional analysis methods of reliability in the foundation pit engineering have larger error and larger amount of calculation. Therefore, the response surface method has attracted much attention because it can effectively use the finite element analysis method (FEAM) and reduce the number of the numerical simulation. This paper combines uniform design (UD) with support vector machine (SVM). On this base, a reliability analysis method of the foundation pit is put forward based on the response surface of support vector machine (RSSVM). The UD structures random samples and the FEAM is used to obtain corresponding response parameters including the lateral displacement of wall, settlement of ground, safety factor of overall stability and safety factor of against overturning. Then, SVM trains the above random samples and corresponding response parameters to get response surface (RS) respectively. The probability density distribution of each response parameter is obtained by combining the Monte Carlo method with RSSVM. The instance analysis shows that the method has high computing efficiency and less amount of calculation, and the result is reasonable. It provides an effective way for the reliability analysis of the foundation pit engineering.
Study on Urban Public Security Planning
Authors: Wu Jing , Chang I Shin , Gong Yuan , Shi Ming Min , Yang Yan Xia
Published: March 2013

The aim of this research is to understand the progress of urban public security planning. In this study, through literature review and comprehensive analysis on related regulations, firstly the risks of public security were identifies and classified into four categories, including natural disasters, accidental disasters, public hygiene events, and social security events. Secondly the risk mechanism for urban public security was defined. Then the progress of theoretical research on urban public security was summarized.
The Investigation on Residential Requirement for the Aged Based on Taking Care at Home
Authors: Qian Jian , Feng Yu Feng , Zhou Jun
Published: March 2013

Through questionnaires and household interviews, the author sorted out assumptions and requirements of the elderly in hardware facilities (e.g. residential monomer, external environment, and supporting facilities, etc.) of a residential community. Based on the single factor analysis on above aspects, multi-factor analysis of different regions, different ages of the senior people were also launched to discuss corresponding planning means of hardware facilities in residential community planning.
A Research on Joint Urban Design Project in Undeveloped Area
Authors: Qian Chen , Guo Xing Hua
Published: March 2013

With taking part in WTO，the Chinese market of urban planning and urban design is gradually opening up，the way of joint design become more popular than before. It can bring positive impact to original mode of thinking training and reform traditional way of working, etc. However, foreign designers are not perfect. Mostly，they just focus on their personality and thinking，so it is difficult to make a perfect combination of concluding idea of design ,the environment, and the culture. So，the Chinese designer should take part in joint design project actively.
Study on the Design of Urban Public Space in City Complex
Authors: Shi Ying , Fei Lan
Published: March 2013

Combined with the example of Namba Parks in Japan, this paper analyzes and summarizes how the public space are created , and then elaborates the importance of public space showing in city complex ,in order to provide valuable reference for city complex construction in our country.
Analysis on the Daily Temperature Variation of a Concrete Slab under Environmental Effects
Authors: Wang Jian Ping , Chen Bo , Zheng Jin , Li Peng Yun
Published: March 2013

The dynamic temperature field of a concrete slab is actively studied in this study with the aiding of the commercial package ANSYS. Fine finite element model of the concrete slab is constructed and different boundary conditions are applied to obtain the temperature distribution within the slab with the aid of the commercial software package ANSYS. The solar radiation model is utilized to estimate the solar radiation received by the slab and the shelter effects are also taken into consideration. The numerical models can successfully predict the structural temperature at different time. The made observations demonstrate that the simulated temperature variation of the concrete slab based on the solar radiation model agrees well with measurement results. It is seen that the numerical models can successfully predict the structural temperature field at different time. The methodology employed in the paper can be applied to other concrete structures as well.
Characteristics of the Initial Stage of CaCO3 Crystallization Fouling on Straight Oblique Fin Tube
Authors: Zhao Ping , Sheng Jian , Zhang Hua
Published: March 2013

To investigate the effect of CaCO3 concentration and velocity on scaling fouling process on plain and SOFT, experiments have been done at different CaCO3 concentration and velocity on the two kind tubes. The results are that the homogeneous nucleation rate and the growth rate are both increase when CaCO3 concentration increases. This make the scaling particle concentration and foulant ions concentration increase, the former gets more scaling on tubes and the later enlarges the heterogeneous nucleation rate and growth rate. Higher velocity decreases the nucleation of scaling, scaling crystal and fouling resistance, but it can prolong the induction period. Higher velocity increases nucleation rate on SOFT first, but the induction period extends and the mass of scaling and fouling resistance decrease. SOFT has a bigger heat transfer coefficient than PT at both clean and fouling conditions and it has smaller fouling resistance even a little more scaling.
Experimental Study of a Novel Indirect Evaporative Cooler
Authors: Wang Yu Gang , Liu Jia Ping , Xiang Huang
Published: March 2013

Set up a test-bed, test the pre-cooling section, cooling section, and the units consist of them separately, then analysis the data. Within the experimental range, the best ratio of the secondary air volume and the primary air volume is 1.2 for the pre-cooling section, for the cooling section is 1.69. The outlet air temperature is below its wet bulb temperature for the units, and higher than its dew point temperature.
Application of No-Negative-Pressure Variable Frequency Water-Supply System in Campus
Authors: Xing Hong Yun
Published: March 2013

The principle of no-negative-pressure variable frequency water-supply system and the current situation and characteristics of the water consumption in campus are analyzed, and at the same time, water-supply design precautions are put forward. With a example, the advantages and disadvantages of no-negative-pressure variable frequency water-supply system in campus are summarized. This paper holds this point that the system is suitable to be used in campus.
Pyrolysis Experiment of Refuse Derived Fuel and Study on Characteristics of Semi-Coke
Authors: Li Yan Ji , Zou Ke Wei , Zhao Ning , Li Run Dong , Chi Yong
Published: March 2013

The experimental material is source-separated municipal solid waste. Remaining waste from primary assortment is compressed into RDF with mechanical molding equipment. We used high-temperature tube furnace for pyrolysis experiment of RDF. The effects of pyrolysis temperature, material composition, choice of additives and the content of the additive on the productivity of pyrolysis for these samples were investigated; the variation trend of content for K and Na elements in semi-coke was analyzed under various factors. The results show that adding plastics, CaO or DHC-32 is conductive to improve the effect of RDF pyrolysis. Increasing pyrolysis temperature is in favor of the process of pyrolysis reaction, meanwhile, the apparent variation trends are presented for the content of K and Na in semi-coke under the various experimental conditions.
Measurement and Questionnaire Survey on Indoor Thermal Environment of a Library in the Hot-Summer and Warm-Winter Region of China
Authors: Liu Hong Juan , He Jiang , Liu Kai Qiong
Published: March 2013

This study dealt with the indoor thermal environment of an university library in Nanning where is hot in summer and warm in winter. Measurements of air temperatures, relative humidity and air velocity etc. at selected points inside the library were conducted during a summer period. Analysis results of measurement data was described in the paper. Thermal comfort was analyzed based on questionnaire survery. This paper also provides suggestions for improving the indoor thermal environment and comfort as well as energy performance in library-like buildings in the hot-summer and warm-winter region.
Research Progress of Landfill Leachate Treatment
Authors: Chen Ping , Kan Lian Bao , Liu Ming Wei
Published: March 2013

The aim of our research was to find the better treatment progress for landfill leachate. It elaborated the source and the quality variation law with time change and harm to human body of the leachate. Listed all kinds of treatment methods, including physical, chemical, biological. Thought the development trends of landfill leachate treatment was the combination of multiple progress.
Synthesis of 7-hydroxy-4-methyl Coumarin with Microwave Radiation Catalyzed by Zirconium Sulfate Tetrahydrate
Authors: Liu Shu Jing , Li Yun Peng , Yang Xiu Min , Jiang Qing Mei
Published: March 2013

The 1,3-benzenediol and ethyl acetoacetate as raw materials were used to synthesize 7-hydroxy-4-methyl coumarin under microwave irradiation with Zirconium sulfate tetrahydrate as the catalyst. The effect of various reaction conditionson on the yield was explored.Experiment shows that the yield reached up to 87. 5%,when the reaction conditions are as follow:n(1,3-benzenediol):n(ethyl acetoacetate)1.0, Zirconium sulfate tetrahydrate 0.4g,10mL cyclohexane, the reaction time 12 min,microwave radiation power 500W.
Understory Light Environment of Canopy Tree Species in Urban Green Land
Authors: Liu Shuang , Li Jing Peng , Xu Ming Feng , Sun Yu Dan , Li Wen Bin
Published: March 2013

Abstract: To give some scientific references for the multi-level configuration of plant community in urban green land, especially for how to choose undergrowth plants which have different light habits, this research investigated the canopy structure and determined understory light environment of 23 canopy tree species which are mostly applied in urban green land in Guangdong province using hemispherical photography. The results showed that understory light environment was influenced by canopy structure significantly and there were significant positive correlation (P < 0.001) between CO and TransDir, TransDif and TransTol, with the correlation coefficient (r) of 0.88, 0.95 and 0.91, respectively; and a extremely significant negative correlation between CO and LAI (r = -0.63; P < 0.001). Hemispherical photography has lots of advantages which are convenient, rapid, practical and accurate. It could not only monitor canopy structure but also determine single tree and canopy tree species which the canopy was broken. This method is supposed to contribute to quantitative research on understory light environment and is essential for scientific research and popularizing in the development of urban garden.
A Study on the Treatment Process of Coalbed Methane Wastewater
Authors: Li Jian Kang , He Dong , Jin Peng Kang
Published: March 2013

According to the continuous monitoring and analyzing on coalbed methane produced wastewater quality, focusing on the large quantity, high SS and Fe qualities of wastewater produced from coalbed methane. Based on the constitution pollutants of wastewater, the treatment process of "pre-oxidation+coagulation+precipitation+manganese sand filter+disinfection" is proposed. laboratory static experiment has been conducted after the wastewater collected from the construction site. The result showed that with this treatment process, the removal rate of SS reached above 95%, the removal rate of COD could be higher than 55% and the removal rate of Fe was above 95%. The quality of treated water could meet the requirement of Ⅱ class water index in "Surface Water Environment Quality Standard" (GB3838-2002).
Assessment of Environmental Quality of Soil Fertilized Grapefruit Trees with Municipal Sewage Sludge
Authors: Ming Yin An , Tao Tao
Published: March 2013

To reuse municipal sewage sludge safely, experiment was carried out on grapefruit trees fertilized with composted sludge from Shiweitou Sewage Treatment Plant in Xiamen City of China, and a method was introduced of how to assess the environmental quality of grapefruit trees soil fertilized with sludge by Set Pair Analysis (SPA) model. The results showed that the soil in the surface layer (0-15cm) and the deeper layer (15-30cm) was less clean, and the environment of soil was not polluted. Thus it was feasible to use sludge as fruit fertilizer. The maximum service life of sludge for continuous land application was estimated by taking Cd as the limiting factor, which would provide scientific guide and technical support for safe land application of sludge.
Research on Treatment of Oily Wastewater by Membrane Filtration
Authors: Chen Ping , Kan Lian Bao , Liu Ming Wei
Published: March 2013

Oily wastewater was more and more serious environmental pollution, one of the main methods for the treatment of oily wastewater was membrane filtration. Introduced the principle characteristics of the different types of membrane filtration, proposed the need to solve the problem of membrane filtration through the membrane filtration project examples.
Study on the Treatment of Surfactant Wastewater by Anaerobic Biological Filter
Authors: Han Wei , Zhou Guo Feng
Published: March 2013

Through experimental study on industrial wastewater of NanFengRiHua by Anaerobic Biological Filter process (AF), AF was proved as an efficient treatment process for refractory industry wastewater. AF process can change molecular structure and improve the biodegradability of nonbiodegradable organic, so AF process has very good practical prospects
Analysis on Landscape Tree Species Composition in the Gardens of the West Lake Scenic Area, Hangzhou, China
Authors: Lu Shan , Chen Bo , Hu Shao Qing
Published: March 2013

Based on the investigation on tree species within plant communities of parks and gardens in Hangzhou West Lake Scenic Area, some indices such as species composition, importance value, application frequency, diameter class structure, health condition, and seasonal aspect structure of woody plants were calculated. The present situation and contributing factors of utilization of the tree species resources in the parks and gardens of the West Lake were analyzed, and some corresponding suggestions were proposed. The results were as follows: 1) There were 166 species of woody vascular plants in the parks and gardens of the West Lake, which belonged to 58 families and 108 genera. Compared with zonal plant species in Hangzhou and landscape plants in advanced foreign cities, the plant species number was very low. 2) About 30 species had high important value and application frequency. It indicated that the arbor and shrub species in each community in the parks and gardens of the West Lake was small at present. 3) The results of study of diameter class structure showed that, the average breast-height diameter of trees in the West Lake was 34cm, and about 67% trees had 20-40cm breast-height diameter. It indicated that a majority of trees were mature. 4) The results of study of health status showed that, most plant species developed well. 5) The results of study of seasonal aspect showed that, the plant landscape in the parks and gardens of the West Lake had different characteristics in different seasons, which were numerous flowers in spring, green shades in summer, colorful leaves in autumn and beautiful branches and trunks in winter.
Some Reflections on Legibility of the Cityscape
Authors: Dong Zheng Lei
Published: March 2013

The legibility of the cityscape is of great importance in order to make the city more attractive for tourists. So I spared no efforts to do researches on this subject through field investigation and case study so as to find ways to make the cityscape easier to identify because its legibility is essential not only to the tourists, but also to the improvement of the city environment. Through studies I found that we could make full use of the streets, terrains as well as its historical characters to make the cityscape more distinctive and legible for tourists. And this is also one of the ways to make the tourism industry of the city more prosperous.
An Approach for Short Term Traffic Flow Forecasting Based on Genetic Neural Network
Authors: Yang Lei , Dai Wei Dong
Published: March 2013

In this paper, genetic neural network is applied to forecast the short-term traffic flow and traffic guidance. Because of the factors of time correlation and spatial correlation, we construct the short-term traffic flow forecasting model using back-propagation neural network that has the function of arbitrary nonlinear function approximation. In order to find proper initial values of the neural network weights and threshold quickly, a combination of neural network prediction method is presented. This method utilizes genetic algorithm to choose the initial weights and threshold, and uses L-M algorithm to train sample, which can enhance the global convergence rate. Trained network is used for short-term traffic flow prediction with mean square error as the forecast performance evaluation. The results show that the performance of genetic neural network is better than a separate BP neural network for short-term traffic flow prediction.
Calculation Method of Spatial Value Added for Commodity to Transport
Authors: Ma Xiao Dan , Cao Li Yan , Xia Xiao Mei
Published: March 2013

To make commodity play its spatial function and achieve the optimal allocation of resources effectively, it analyzes the influence factors of co spatial value added for commodity to transport. It begins with the relationship between different region's disposable income, economic level and commodity prices to search for computation spatial value added for commodity to transport. Then it analyzes calculation method of spatial value added for commodity to transport and establishing the space added value-price model to reflect commodity space added value. Last it raises commodity space value-added effective method. It gives full use of goods value and promotes commodity reasonable space layout.
Analysis and Application of BIM Technology in the Project Goal Control
Authors: Wang Ding Tang
Published: March 2013

BIM is a method which is based on the integration of digitalization technology and visualization technology to manage information related project construction. This paper states the build process of imitating reality by using BIM’s visualization technology with multi-dimension and large data, and unique features for finding the potential problems and risks under virtual construction environment by BIM’s technology, so as to find problems in advance and evaluate them preliminarily, put forward corresponding countermeasures and prevent measures, work out optimized scheme to guide the real construction, and control effectively the project’s quality, progress and cost. BIM solves fundamentally the management defects from traditional project, and will certainly bring about a series of great changes in the circles of project management.
Construction Engineering Bidding Risk Analysis
Authors: Yu Fan Jing , Li Jun Jie
Published: March 2013

In the Bill of Quantities mode, the bidder must take risks of his tender offer. This paper researched on the uncertainty of construction projects costs, proposed Monte Carlo simulation method and procedure to simulate the construction projects costs on the basis of the construction projects costs conform to the characteristics of normal distribution, and also put forward a method to calculate risks of the tender offer in accordance with the established bidding strategy, which are helpful to the risk management and control of project contracting enterprises.
A Study of the Prediction of Load-Settlement Curves of Bored Piles with an Improved Grey Model
Authors: Wang Cheng Hua , Zhang Mei Na
Published: March 2013

An improved grey system model GM(1,1) was proposed in this paper, considered that the large difference between predicted results and measured load-settlement relationship results of bored piles, in which the prediction results were given by the original theory. The complete and incomplete load-settlement curves from pile loading tests were fitted and predicated by the improved grey model. The results calculated with empirical equations or methods in technical code for building pile foundations were compared with those predicted with the improved grey model. Analysis of a case study showed that the results predicted by the improved grey theory model GM(1,1) had higher precision, which demostrated that this improved theory was of significance in engineering practice.
Study on Law of Structural Evolution and Sedimentary Evolution for North Uskyurt Basin
Authors: Liu Chao , Xue Hai Tao , Wang Shuang , Sun Yu Jiao
Published: March 2013

North Uskyurt Basin, located on Turan Plain, northwestern Central Asian, is continental polycyclic cratonic. The structural evolution of the basin underwent six phases: basement formulation, passive edge, rifting, post-rifting, compression, early Neogene depression. Regional structural evolution takes control of complicated transition of North Uskyurt sedimentary structure. In general, basin sedimentary environment underwent basement (granite, metamorphic rocks) passive edge, late Devonian epoch carboniferous period (marine facies) rifting, late Permian epoch-triassic period (continental facies) post-rifting, Jurassic period-Cretaceous period (Marine-continental Transition Facies, marine facies) compression, late Eocene-Miocene epoch (marine-continental facies coexistence) Neogene depression, Pliocene-Holocene (continental facies). Consequently, sedimentary formation in which various sedimentary environment, such as marine facies, continental facies, are coexisted with various rock types, such as clastic rocks, carbonate rocks, is generated.
The Analysis for the Dynamic Strength and Vibration Liquefaction of Saturated Sand under Cyclic Loading
Authors: Xu Liang Kun , Liu Wen Lian
Published: March 2013

Saturated Sand；Cyclic Loading；Dynamic Strength；Vibration Liquefaction Abstract.The liquefaction problem of saturated sand under cyclic loading is essentially a dynamic strength problems,but under the action of load,its strength has a sudden dramatic loss and it is unexpected.so it is different from the general dynamic strength problem.This paper analyzes the dynamic strength of saturated sand under cyclic loading.And its vibration liquefaction mechanism, influencing factors and preventive measures are analyzed and discussed.
A Power-Dilemma Model for Demolition Conflict Analysis From the Perspective of Social Psychology
Authors: Qin Zhong Fu , Shu You Tao
Published: March 2013

Focusing on actual demolition conflicts,which have exerted negative effects upon society, a power-dilemma model has been constructed, which illustrates three power dilemmas in demolition conflicts including power-dilemma caused by spatial distance, power-dilemma caused by psychological distance and power-dilemma caused by responsibility shifting. Besides, detailed analysis on demolition conflicts based on asymmetrical power was presented from the perspective of social cognition.
Computer Simulation Forecast of the Markov Chain for Payback Period of Construction Projects Investment
Authors: Zhang Meng Fang , Huang Liang , Shan Lu Yang
Published: March 2013

The investment payback period of construction projects is an important index that evaluate and measure economic effect of project investment. It is difficult that the investment payback period of construction projects is calculated generally using analytic method.We established the mathematical model of the payback period, the annual net cash flows are Markov chains. According to the similar projects, collected net yearly cash flow and each quarter net cash flow, A one-step transition probability matrix was described by using the computer simulation of Markov chains, forecasted the dynamic and static payback period of construction projects investment. so as to provide the scientific basis data for decision makers.
Study on Saving-Energy Product’s Application in Residential Building based on the Product’s Life Cycle
Authors: Peng Yan , Chen Yi
Published: March 2013

The life of saving-energy’s product of building generally less far than 50 years compared with the 50 years’ life of urban construction. Because of the relationship of property’s right of residential building complex, legal environment now isn’t better. In future, high maintenance and update cost of all saving-energy product of building will be an important problem. We must change the concept of paying much attention in construction than management, have a LCCA analysis and evaluation of buildings in investment; perfect the relevant laws and regulations; clear the responsible, right, obligation of the property’s. To serve the investor and the owner by effective asset management system, realize the building’s sustainable developing.
Analysis of Influencing Index System of Human Error in Dam-Break Risk
Authors: Li Dan Dan , Zhang Da Wei , Li Lei
Published: March 2013

Now human error has caused lots of dam-break accidents home and abroad, but there is few studies about the human error in dam-break accidents. Based on the analysis of influencing factors of human reliability in dam risk, the influencing index system of human error is established, which includes four quotas of the first grade and twelve quotas of the second grade. According to expert estimation, the weights of index are determined by analytic hierarchy process.
Combined Impacts of Sand Mining Activities: The Nandu River Downstream Segment
Authors: Jiang Shu Wei , Haibier Abuduhelili , Wu Yong Xin
Published: March 2013

With the accelerated pace of urban construction in Hainan province, demand for building sand increased rapidly, river sand prices soared. This led to the illegal and unauthorized sand mining continue to emerge at Nandu River downstream segment. The current sand mining situation of Nandu River downstream section was expounded. The various impacts of sand mining activities on river regime, flood safety, hydrodynamic characteristics of the river, development of delta and water environment have been studied according to measured data and results of field investigation. It is shown that sand mining activities undermines the natural evolution of the river regime; affects the habitat of fish and other aquatic organisms. Water level drops, water velocity decreases, and the Nandu Rive delta coastline retrogrades due to sand extraction. Besides, sand mining has an obvious adverse impact on infrastructures, waterway safety and social stability.
Application of Google Maps API with Grails Services for Mapping Highway Construction Sites
Authors: Bahrudin Ida Aryanie , Abdullah Mohd Ezree , Mohd Hanifa Rafizah , Surip Miswan , Abdul Latiff Ab Aziz
Published: March 2013

Most people agreed that Google Maps set the standard for ease of use when it comes to a free online web mapping services. In addition, different map views are available which user can choose from the options of a terrain view, normal map view, or satellite image view based on their needs. Embedding a Google Maps on a website will not only make it more user-friendly but also enable people to access certain location with more ease. This paper intends to introduce the use of this geoinformatics services from Google along with Grails services in creating a simple interactive map for highway construction sites. A discussion will cover up the use of programming interface provided by Google and Grails (open source web application framework) and also the advantages of embedding the map to the website.
Method of Rectangular Angle Vectorization and Restriction Used in Auto-Forming Board and Application
Authors: He Lin , Wen Qiao , Zhang Hou , Yuan Jian , Tian Yu Bing , Gen Jian Xun , Wang Shao Jun , Jin Yang , Wang Yu Hui
Published: March 2013

A novel rectangular vectorization method which uses for auto-forming board based on the feature analysis on a great many of shear wall structural design charts is presented. The constructional design drawing was firstly deconstructed into elementary figure unit which contains lines and rectangular angles. These split functional cell were secondly vectorized by restricting straight line so as to reorder and reclassify these essential structural parts. Finally, the components made for the forming board were obtained from the identified cells combined with the shear well angle’s location. This auto-forming board technology has been applied in cast-in-place concrete practices and the results demonstrate that this method and technology can accurately identify complex constructional drawing constitution of building and raise substantially the efficiency of auto-forming board for building construction. This method also provides the key technique support for smart construction technology.
A Security Framework for the Internet of Things Based on Public Key Infrastructure
Authors: Hong Ning
Published: March 2013

This paper proposed a security framework for the internet of things based on Public Key Infrastructure (PKI) which aims to answer these questions that how to solve the security problem in the internet of things between the client operation and service operation. It illustrates the model by presenting a modified security framework for a variety of applications than traditional PKI framework. Our aim is to show the new security framework in the internet of things that the traditional internet network does not have.
The Research of the Multimedia Technology Application in the Enhancing Oil and Gas Recovery Teaching
Authors: Ma Wen Guo , Wang Ke Liang , Zhang Ji Hong , Wu Wen Xiang , Wu Jing Chun , Song Wen Ling
Published: March 2013

In this paper, the reformation of education concepts is studied during the implementation of the excellent engineer training program process. By the practical experience of innovative engineer personnel training is done in the Enhance Oil Recovery course of teaching practice, the innovative engineer personnel training content and reformation of education concepts is studied. Multimedia Technology ways to enhancing the relationship of theory and practice teaching, strengthen understanding and problem-solving abilities of students on the Enhancing Oil and gas Recovery teaching. It will provide references for the excellent engineer training program process in the field of petroleum engineering university.
Study on Sample Preparation Method of DEM
Authors: Liu Yang , Zhu Xian De , Wan Chen Ye
Published: March 2013

Three numerical sample preparation methods, namely, radius expand method, hierarchical compaction method and gravity descent method, were studied using discrete element method (DEM) to simulate the actual sample. The processes of these three methods were described in details and the differences of these three methods were discussed. The impacts of mechanical parameters in DEM model on the numerical results were analyzed.