bluuebunny/crossref_metadata_2025 huggingface dataset:
Urban Railway Bridge Fast Evaluation Based on Cloud Computing
Authors: Chen Ming , Zhou Wan
Published: August 2011

Although modern bridge are carefully designed and well constructed, damage may occur in them due to unexpected causes. Currently, many different techniques have been proposed and investigated in bridge condition assessment. However, evaluation efficiency of condition assessment has not been paid much attention by the researchers. A fast evaluation of the urban railway bridge condition based on the cloud computing is presented. In this paper dynamic FE model and Artificial neural networks technique is applied to model updating. The cloud computing model provides the basis for fast analyses. It was found that when applied to the actually railway bridges, the proposed method provided results similar to those obtained by experts, but can improve efficiency of bridge
The Causes and Preventive Measures of the Differential Settlement is in Buildings Foundation
Authors: Chuai Min Zhao , Zhao Bai Dong
Published: August 2011

As we all know, buildings always have a certain post–settlement after using many years. Differential settlement often led to the building collapse, cracking. It even affects the using seriously. Therefore, in order to reduce the differential settlement of buildings, it should research preventive measure based on settlement causes. According to this, the purpose of this activity is that it can achieve effective prevention, control uneven settlement production. Finally, these measures can eliminate the root of the accident.
The Tests and Measures of Concrete Ageing and Steel Bar Corrosion of the Salt Free Contaminated Inland Waterlocks
Authors: Zhang Jin Yang
Published: August 2011

There are mainly three phenomena, i.e. cracks, infiltration and denuding for judging the aging and defects from hydraulic concrete constructions. The inland waterlocks’ concrete ageing with salt free contamination are found basically the concrete denuding, rebar erosive expansion cracks and concrete surface gravel exposure and freeze thawing peeling-off as well occasionally. The severe aging phenomena always occur in some small structures in work bridges, sub work bridges, railway bridges and concrete waterlocks etc, especially in boundary beams or flange plates of the said beams. The result manifests that the test result is completely in conformity with the actual situation in the test of internal concrete steel bar erosion by means of Eigenvalue K method and half-cell potential method. In order to prevent steel bars in the concrete from eroding and guarantee the durability of waterlocks, currently the treating method used most frequently is the waterlock concrete surface carbonization resistance treatment
Modeling of Steady Natural Ventilation in Solar Chimney
Authors: Su Ya Xin , Liu Zhong Bao
Published: August 2011

A revised one-dimensional steady model was proposed to improve the prediction of the natural ventilation performance in a solar chimney. The thermal resistance of the glass cover and absorber wall was taken into account to calculate the heat transfer between the air and the glass cover or absorber wall in the model. The present model results were compared to the related experimental data and reasonable agreement was validated. Comparison of the results also showed that the present revised model was able to predict the mean temperature of air in the channel, the air mass rate and heat collection efficiency more preciously than the original model.
The Application of Improved Earned Value Model in Engineering Quality and Progress Coordination Management
Authors: Gao Xu Kuo , Ye Zhi Ming
Published: August 2011

Schedule, cost, and quality are three main elements to describe the situation of a project’s execution. The improved model, which is based on the tradition EV model, quotes the definition of quality cost and combines the cost, progress and quality, then forms the quality earned value system and the coordinate coefficient of quality and progress.The developed model and the coordinate coefficient, which are on basis of quality cost, make up the deficiencies of traditional EV in terms of quality management. They provide a new method to describe and analyze the situation of the project’s execution systemic, scientific and exactly.
Study on Traditional Inheritance and Development from the Perspective of Information Theory and Fractal Theory - Application of the Traditional Street, Lane and Courtyard in Contemporary Residence
Authors: Su Hong Zhi , Song Jun Liang
Published: August 2011

The urban construction represents a dynamic development process. It not only maintains close ties with the tradition but also highlights the great expectation for the future, so we are faced with the problem of the traditional inheritance and development and its essence lies in the transmission of information, which, in turn, follows the principle of iteration. Therefore, it has a fractal characteristic. This research paper focuses on the modern application of the traditional street, lane and courtyard from the perspective of the information theory and the fractal theory so as to activate the traditional urban elements and give more vigor and vitality to the modern city.
Record and Comment on the Whole Process of a“Campus Building”Full-sized Construction: Application of Model Language in Architectural Teaching
Authors: Wu Yong , Zhu Xiao Qing , Zhao Shu Hong
Published: August 2011

The paper researched on the application of model language in architectural teaching, and beginning with the record of the whole process of a full-sized construction practice, it analyzed the advantages of employing construction in architectural teaching, pointed out the probable demerits that could exist in the system, and provided solutions. It put the construction of Campus Building to test under architectural educational background, and based on the final results discussed the maneuverability of “multi-major united education” in teaching innovations. It tried to find out the points through which the concepts could intervene in architectural education, and how full-sized construction could truly improve architectural students’ major literacy in the long and short terms.
Problems and Solutions of Hangzhou Community Regeneration
Authors: Liu Sheng Da , Yang Yu Ren
Published: August 2011

Hangzhou City is now experiencing lots of urban regenerations known as "Street and Lane reform" and "Garden Improvement Project", yet practically the results sometimes turned out to be different from that is expected. The phenomenon derives from various social realities, which is based upon the Chinese background nowadays. This essay takes these two issues as examples and analyzes both of their successful and unsuccessful experiences in three aspects, such as the pubic investment in private realm, government domination and public participation. It tries to find out what is working behind the whole operating system which makes the community working as we hoped. Finally, it argues that giving the community authorization could be the better community regeneration solution mode, and provides how to attract the private capital to make the regeneration really effective.
Construction Waste Management: Current Status and Directions for Further Study
Authors: Cheng Xin Xin , Chen Jian Guo , Chen Min
Published: August 2011

Nowadays, the increasing awareness of environmental impacts from construction wastes has led to the development of waste management as an important function of construction project management. Various theories and approaches for managing construction wastes have been developed in the existing research works and practices. The objective of this descriptive study is to analyze the current status of construction management and indicate the directions for future study. Based on a review of literature，this paper gives a framework of construction waste management from the view of fields, methods and measures in existing researches, and then it indicates several directions for further study, such as behavior and incentive scheme, assessment and evaluation system, multi-objective optimization the application of information technology and so on.
Research on the Structural System of Kilometer-Scale Cable-Stayed Bridges
Authors: Liu Chang Peng , Yan Wei Ming , Chen Yan Jiang , Zhou Da Xing , Zhang Xi Gang
Published: August 2011

At the beginning of the 21st century, Su-tong and Stonecutters cable-stayed bridges were born into the world, which make the original span record of 890m up to 1088m. The increasing range of the span is so large that it is necessary to carry out a special research on structural system of the cable-stayed bridge with kilometer-scale span. Therefore, two cable-stayed bridges have been designed as the research objects, which come from the background of Su-tong cable-stayed bridge. And the main span is respectively 1308m and 1500m. In this paper, an analysis is carried out from the aspect of girder-tower relationship which comes from the concept of the structural system. In the static analysis, structural system, which is respectively floating, half floating and rigid, has been studied. And in the dynamic analysis, the girder-tower relationship has also been studied, which is respectively with no dampers, elastic links and viscous dampers. Based on the analysis results, structural system applicable for kilometer-scale cable-stayed bridges is summarized.
Research on Landscape Environmental Design of Universal Design
Authors: Zhang Dan
Published: August 2011

In this article, one kind of feasibility design theory and the method is presented. It is on base of the advanced universal design, showing concern to the minority groups, and also by the user-friendly principle. The method is to satisfy the minority groups the specific behavior demand; moreover the paper explores the construction landscape environment design principle and arrives on some suggestion.
Application of Projection Pursuit Clustering Method in the Evaluation of Coal Mine Safety
Authors: Guo Zhang Lin , Song Qing Ke , Liu Jun E
Published: August 2011

An effective and general model — projection pursuit clustering model is proposed in this paper. It can solve the incompatible problems of indexes of safety evaluation，which are uncertain，fuzzy and complex. At the same time, it improves the recognition rate of the coal mine safety evaluation model. It uses genetic algorithms to find optimal solutions for the model, the information of which can be used to research the influence of all the indexes on the evaluation of coal mine safety. The paper clusters the safety level of each coal mine according to each projection value, which provides the objective basis for decision-making of the evaluation of coal mine safety. This paper combining with the example demonstrates operation process. It also proves the method is scientific and feasible, which is of significance of coal mine safety evaluation.
Modeling Route Choice Behavior of Chinese Toll Road Users Based on Structural Equation Model
Authors: Yang Liu , Wei Xiao Wei
Published: August 2011

Several toll road corridors were surveyed for route choice behavior study and the structural equation model was used to analyze the route choice behavior influenced by the factors of vehicle type, vehicle ownership, trip purpose, trip distance, trip time and cost. The results suggest that vehicle type, vehicle ownership and trip distance can all have impacts on the route choice behaviors, and the influences of the trip distance and the vehicle type on the route choice behaviors are the largest.
Study on Strain Character of Malan Loess with Damage
Authors: Lin Bin , Chen Zhi Bo , Ma Tao
Published: August 2011

Compress Experiment result shows that the unsaturated Malan loess has strong structure, the structure strength is linear decreasing with the increasing of water content, and the character of stress-strain relationship is soften type. Although the relationship can be described by hyperbolic function, it is difficult to decide the residual strength in function. Based on the hypothesis of damaging to rigidity degree, when damage developing function is introduced to unsaturated loess, the soften type relationship of stress-strain can be described by a linear constitutive Equation with damage variation. Analyzing and comparing the research result shows the soften type stress-strain relationship can be described well by the constitutive function with damage.
Road Luminaire’ Mesoptic Luminous Efficiency Analysis
Authors: Huang Ke , Weng Ji , Hu Ying Kui
Published: August 2011

Four kinds of traffic lighting sources HPS, MH, LED and EDL are widely used in roads and tunnels, the luminance at this place almost in the range of 1-10 cd/m2, which is the mesoptic vision. The mesoptic luminous efficiency can be calculated from photopic vision spectral luminous efficiency function. The results indicate that HPS’s luminous efficiency increased with improve of adaptation brightness, while the rest three kinds of light sources’ luminous efficiency reduced. At the same luminance level, HPS, MH, LED and EDL’s mesoptic luminous efficiency reduced in turn.
Forecast Model for Gas Well Productivity Based on GA and SVM
Authors: Xu Chun Bi , Liu Jing Cheng , Li Jun
Published: August 2011

The accurate prediction of gas well productivity is an important task in gas reservoir engineering research. According to the global optimization ability of the genetic algorithm (GA) and the superior regression performance of the support vector machine (SVM), this paper proposed a method based on GA and SVM to improve the prediction accuracy. As the proposed model can reduce the dimensionality of data space and preserve features of gas well productivity, compared with BP neural network model, the proposed GA-SVM model for gas well productivity in practical engineering has higher accuracy and speed, the maximum error is 1.5%. Thus, it provided a new method for the forecast of gas well productivity.
Analyses the Existing Problems and Development Countermeasures of Jiangxi University of Traditional Chinese Medicine
Authors: Nie Qi , Li Juan
Published: August 2011

Based on Jiangxi University of Traditional Chinese Medicine survey and found that the current development of TCM University in Jiangxi stadiums management exist some basic questions, and puts forward some corresponding countermeasures to these problems, and provides referential theory basis for the development of our school stadiums.
Research on the Effect of Enclosure Greening on the Building Energy Saving
Authors: Ge Hai Jie , Lin Xing Xin , Xiong Hai Bei
Published: August 2011

Two same concrete experimental models are made to simulate solid buildings with the control variable method, by making 100% coverage of roof greening and 50% coverage of wall greening on the enclosure of one model, and taking the other model as the reference without arrangement of greening. Then collect the data of the temperatures inside and outside the models. The analysis shows that during the period from October, 2010 to March, 2011, the average accumulated temperature of the test model is 1.31°C∙h higher than that of the control model, and the green plantations can effectively reduce the heat transfer coefficient of enclosure structure, and improve the thermal resistance of the enclosure. The greening method used in this experiment can improve the thermal insulation of the enclosure by about 10%.
Finite Characteristic Ratio Theory Model Analysis for the Thin Rock Pillar of a Twin Tunnel
Authors: Li Zhang Ming , Wu Feng
Published: August 2011

The machnical response of the thin rock (and/or soil) pillar of a twin tunnel with super-large-span and small-spacing is described upon a model of finite characteristic ratio constitutive theory (FCRT). The analysis result is compared with the results from in situ monitoring and the D-P model of the classic plastic constitutive theory; it shows that the deformation characteristics of the middle pillar during tunnel excavation process can be reasonably described by the FCRT model, and the method of parameter determined of the FCRT model is relatively simple than the classic plastic model due to the model has a clear physical background and with little randomness.
Fabrication of TiO2 Films on Glass Substrates by a Pulsed Dc Reactive Magnetron Sputtering
Authors: Wang Qi Min , Zhang Teng Fei , Kwon Se Hun , Kim Kwang Ho
Published: August 2011

Due to its ability of photocatalysis and photoinduced superhydrophilicity, TiO2was paid significant attentions in recent years. In this study, TiO2films were deposited at room temperature and 300 °C by pulsed dc reactive magnetron sputtering. The gas pressure was varied in the range of 0.3-1.1 Pa by filling Ar/N2gas mixture with the ratio of 1:1. The surface morphologies, phase structure and optical property of the TiO2films were investigated. TiO2films with good crystalline quality containing mainly of anatase phase were obtained by deposition using gas pressure of 0.7 Pa at room temperature and gas pressure of 1.5 Pa at 300 °C.
Construction Environmental Load and Assessment Research Based on Heilongjiang Province
Authors: Pan Rui
Published: August 2011

This essay has studied the environmental load during the construction process of Heilongjiang Province, and built the mode which based on the green construction environmental load of the province. Moreover, this essay has made further discussion on the key technology of the environment control during the green construction process of the province, and has established the green building materials and green construction assessment systems based on the province.
The Preparation of PVAc with Lower PDI through RATRP in Miniemulsion Polymerization
Authors: Feng Hai Ke , Dan Yi
Published: August 2011

In this paper, reverse atom transfer radical polymerization (RATRP) was used to prepare polyvinyl acetate (PVAc) with lower polydispersity index (PDI). The different ligands such as bpy and PMDETA were studied separately to control the polymerization of VAc. The results show that RATRP is not controlled with bpy as ligand, but it is possible to obtain PVAc with low PDI when PMDETA was used as ligand.
Finite Element Analysis of Reinforced Concrete Beam Stress Performance at Ultra-Low Temperature
Authors: Liu Shuang , Lv Chao
Published: August 2011

To study the reinforced concrete beam stress performance under ultra-low temperature, Monotonic static load tests of 6 reinforced concrete beams were conducted at a temperature range from -180 oC to -40°C by using home-made jig and fixture for low temperature. The failure modes and the mechanical properties of the reinforced concrete beams under low temperature were investigated. The test results showed that both the bearing capacity and the stiffness of the beams increased with the decrease of the temperature. Based on the material constitutive and mechanism at ultra-low temperature, the numerical simulations are implemented and component test is expanded by using DIANA software environment.
Research on Design Method of Combined Steel Lead Energy Dissipation Structure
Authors: Yan Xue Yuan , Qi Ai , Lin Wei , Wang Su Guo
Published: August 2011

Construction and control principle of the new combined steel lead damper (NCSLD) were introduced, pseudo-static tests of NCSLD which would be used in the subsequent shaking table tests were carried out for the study of its mechanical properties using electro-hydraulic servo press-shear machine. Structural seismic design procedure using NCSLD is presented. An engineering example of seismic strengthening using NCSLD is provided. Results of tests and analyses indicate that NCSLD has full hysteresis loops which take on bilinearity; NCSLD is of strong energy dissipation ability and has obvious control effects for structural inter-story displacement and acceleration reactions.
Compression Properties of Granulated Rubber-Loess Mixtures as a Fill Materials
Authors: Li Zhao Hui , Zhang Hu Yuan
Published: August 2011

One-dimensional confined compression tests have been used to investigate the compressibility of granulated rubber-loess mixtures with rubber content of 0,10,20,30,40,50,100%. The purpose is to find the compression probability of their usage as a lightweight fill material. The results indicate that the compression properties of mixtures are between pure compact loess and pure granulated rubber. The coefficient compressibility, elastic strain, and recover strain increase with increasing rubber content. Granulated rubber-loess mixtures showing behavior of modular variation with changing granulated rubber content, can be used as lightweight materials in civil engineering applications to sharply reduce the tire disposal problem and solve problems concerned with stress and deformation.
Study on Frost Resistance of Concrete Used in Pavement of Northeast China
Authors: Gao Song , Dai Li
Published: August 2011

According to the cycles of freezing and thawing frequently happened during early spring and late autumn in northeast china, this paper studies on the frost resistance of concrete using in highway pavement. Making experiments by adding flyash, silicon powder, air entraining and water reducing agent to normal concrete with different proportions and using flexure strength, compression strength and mass loss rate of concrete as evaluating indicators, a reasonable and economic concrete proportion is determined, which reaches high flexure strength and compression strength, good frost resistance. On the bases of the experimental results and economic analysis, it is shown that the concrete proportion can effectively enhance the frost resistance of concrete. Therefore, it has good use value and it is promising with a good prospect of application.
A Research on the Anti-Sulfate Corrosion Effects of the Concrete Mixed with Complex Multi-Mineral Admixture
Authors: Tang Ying , Wang Guo An
Published: August 2011

This paper is focused on the method for improving capability of anti-sulfate corrosion of concrete. Based on the performance characteristics of mineral admixture, propose a method that mixing concrete with complex multi-mineral admixture to improve the effect of anti-sulfate corrosion. Finally, the ability of anti-sulfate corrosion and anti-dry-wet cycle, in different case, is studied and compared. The results show that concrete mixed with complex multi-mineral admixture is advantageous to improve the anti-sulfate corrosion effects of the concrete. The proportion of mineral admixtures has significant influence on the anti-sulfate corrosion effect. As the silica fume and slag content increased, the fly ash content decreased, the ability of anti-sulfate corrosion enhanced.
Quality Control of Envelope Insulation Building under Construction
Authors: Xue Yun , Dong Guo Ming , Wen Hui Xia
Published: August 2011

China building energy-saving technology is in the early stages of the development with energy high consumption and low energy efficiency. It is especially important to control each link of the building energy-saving for energy conservation. In construction of the envelope structure exists Some prominent effects ，such as the compilation and implementation of the construction technology, the review of design alteration, the performance measurement of materials and components, and control of construction technical measures, we should be implemented related inspection and control in all stages of the implementation process.
Research on Behavior of Ultra-High Toughness Cementitious Composites Reinforced Frame Joints
Authors: Su Jun , Xu Shi Lang , Xia Dong Tao
Published: August 2011

In this article, through the seismic experimental analysis for six frame joints of ultra-high toughness cementitious composites, the load-carrying capacity, hysteretic behavior, energy dissipation and ductility of new joints are studied under different axial compressive ratio and the stirrups space. The experimental results show that the UHTCC joints have higher anti-cracking capacity and shear ductility. The UHTCC can reduce or even eliminate the amount of shear stirrups of the joint core. According to the analysis for the experiments, a theoretical calculating formula of shearing capacity is presented, whose calculating results agree well with the experimental results.
The Existing Architecture Energy-Saving Technologies’ Application in the Residential Community’s Transformation
Authors: Wang Li Ying , Hao Qiu Shi
Published: August 2011

In this thesis, it starts from the status of China's energy consumption and energy efficiency application, analysis our country’s existing architecture common problems and causes, combined with engineering practice, put forward the technological measures to the existing architecture energy-saving’s transformation.
Study on Flue Gas Desulphurization Gypsum Plaster
Authors: Chen Miao Miao , Yu Yun Wei , Feng Chun Hua , Li Dong Xu
Published: August 2011

Flue gas desulphurization (FGD) gypsum and fly ash are two kinds of solid waste in coal-fired power plant. The possible displacement content of fly ash in gypsum plaster was investigated in this paper. The effect of various chemicals retarders, such as Citric acid, sodium citrate and SC gypsum retarder, and water retention agent on the setting time, flexural strength and compressive strength of gypsum plaster was also studied. The results demonstrate that gypsum plaster has maximum mechanical properties and enough setting time at the rate of 20% fly ash replacing calcined gypsum; SC gypsum retarder effectively delays the setting time and has lower strength loss; The optimum level of water-retention agent for effective utilization of gypsum plaster is 0.2%.
Investigation on Protectional Ability on Steel Bar of Compound Corrosion Inhibitor Applied in Seawater-and-Sea Sand Concrete
Authors: Xu Chun Xia , Ou Zhong Wen , Zhou Jun Long , Chen Han Bin , Chen Qiao
Published: August 2011

Seawater and sea sand mixed in concrete will cause rebar of structural concrete corrosion, referring to the principles of composition and design of MCI and Pearson’s Hard-Soft Acid-Base (HSAB) theory, as well as to synergy effect of corrosion inhibitor applied in chemical industry, compound corrosion inhibitor has been designed consisting of diisopropanolamine, surface active agent, inorganic salts and so on. This paper research the relation between polarization potential and time of rebar in seawater-and-sea sand concrete through a series of experiments by adding corrosion inhibitor into seawater-and-sea sand concrete to improve its corrosive resistance characteristics. The results indicate that Z5 has the best inhibition effect. Corrosion inhibitor Z5 comprises 50% of triethanolamine, 20% of dimethylethanolamine (DMEA), 25% of triethoxysilane and 5%lithium nitrate, and its proper content applied in seawater-and-sea sand concrete is 1.5%. Rebar have been embedded in seawater-and-sea sand concrete for the long-term test. The results show that corrosion resistance performance of seawater-and-sea sand concrete with corrosion inhibitor Z5 was significantly improved, and the embedded bar was not corroded at all within 420 days.
Experimental Study on Fracture Toughness of Q460C the High-Strength Construction Steel at Low Temperature
Authors: Wang Yuan Qing , Lin Yun , Zhang Yan Nian , Shi Yong Jiu
Published: August 2011

Three point bending tests were carried out on 14mm-thick Q460C the high-strength structural steel at low temperature, and scanning electronic microscope of the fracture appearance was analyzed. The results showed that the obvious feature of brittle mechanism was shown on the three point bending specimen fracture whose testing took place at -40°C. And the crack tip opening displacement value of Q460C steel, which was less than that of Q235 steel, Q345 steel and Q390 steel at low temperature, tended to decrease with respect to the temperature reduction. Moreover, a Boltzmann function fitting analysis was applied to the experimental data, and the ductile-brittle transition temperature and the changing regularity were obtained.
On Carrying Capacity of Concrete Columniation in Seawater by Genetic Algorithms
Authors: Lin Yue Zhong
Published: August 2011

According to the data of carrying capacity of concrete columniation in seawater in different circulation times, a non-liner regression model is established between circulation times with carrying capacity of concrete columniation in this paper. The parameter is calculated by Genetic Algorithms, and then the carrying capacity of concrete columniation is calculated with the model. Good agreement is reached between the theoretical calculations with test results; the average relative precision is over 92%. As a result, it can be used to analyze the carrying capacity of concrete columniation in seawater. This analysis method is intelligent.
Interior Decoration Materials’ Potentialities for Artistic Originality
Authors: Yi Rui
Published: August 2011

Building materials for decoration are carriers for space art design to represent language, are material foundation for environment art design. Selection of materials is the basic matter for study of design. So, only by getting a full understanding of the properties of decoration materials, making good use of their advantages through reasonable selection and flexible collocation, and with respect to the available space environment, can materials perfectly perform their functions, thus fulfill the demand of interior space design. Art design and materials are interactional. The realization of art design depends upon materials and materials can get life with excellent design. By starting from the use of physical appearance of materials, we can dig out interior decoration materials’ potentialities for originality, and break through traditional way of design expression, and set up new concepts about how to use decoration materials.
Study on Photoelectrocatalytic of Three-Dimensional Electrode Using TiO2 Coated γ-Al2O3 and Scrap Iron Particle Electrode
Authors: Su Hui Dong , Du Hong Lei
Published: August 2011

Titanium oxide coatings(TiO2/Ti) were formed on the titanium surface by micro-arc oxidation(MAO) in Na3PO4solution.And using the TiO2/Ti as anod electrode, the titanium as counter electrode in the system of three-dimensional electrode.Coated γ- Al2O3(TiO2/γ-Al2O3) that prepared by sol-gel dipcoating method ,and scrap iron mixture as particle electrode, combining with the UV lamp and regulated power supply make up the three-dimensional electrode photoelectrocatalysis system. The photoelectrocatalysis system use 0.02M Na2SO4aqueous solution as supporting electrolyte.The photoelectrocatalytic ability of titanium oxide coatings were evaluated by photoelectrocatalytic degradation of methylene blue aqueous solution.The experiment demonstrate that compare to photoelectrocatalytic degradation of single TiO2/Ti film and only adsorbtion, the photoelectrocatalysis of three-dimensional electrode with coated particle electrode have the synergistic effect with them, which can improve the degradation of methylene blue aqueous solution. When the methylthionine chloride concentration of 5mg/L, cell voltage of 7V. The three-dimensional electrode photoelectrocatalysis degradation of methylene blue compare to traditional two-dimensional plate electrodes which without particle electrode increase 43.35% after 3 hours photoelectrocatalysis.
Transfer Mechanism of Steel Fiber Reinforced High Strength Concrete Three-Pile Caps
Authors: Gao Dan Ying , Hai Hui , Lei Jie
Published: August 2011

Based on the experiments on 10 specimens of steel fiber reinforced high strength concrete three-pile caps with the ratio of the model to the real of 1:5, the developing of cracks and failure of caps were described, the transfer mechanism of pile caps was analyzed in detail and the principle of space truss model of the thick three-pile cap was proposed. The test results suggested that the destruction of thick pile cap belongs to punching or shear failure, which is different from that of the general bending member.
The Model and Countermeasures of New Building Material Industry Based on the Cyclic Economy
Authors: Zheng Ji Liang , Qin Da Wei
Published: August 2011

Building material industry can absorb lots of scrap of chemical industry, metallurgical industry and coal industry. Through our further study on the application of cyclic economy in the building materials industry, we initially summarize the co-production models between building materials industry and other industries, such as coal, metallurgy and mining, based on the recycling economy. The models also represent the basic patterns which can recycle mineral resources and reuse energy efficially. We advice some possible countermeasures though analysis of the domestic application of these models in the current problems and challenges.
Effects of Ca Addition into AZ91D Alloy on Structure and Tensile Fracture Behavior
Authors: Tang Bin , Li Shuang Shou , Xu Man Qiong , Zeng Da Ben
Published: August 2011

The influences of Ca addition (<1.2wt %) on structure and tensile fracture behavior of AZ91D alloy were investigated in this article. These results indicated that Ca addition can both form Al2Ca phase on interdendritic boundary and refine grain size. Ca addition evidently increases the yield strength but decreases the elongation of AZ91D alloy. The crack initiations of the AZ91D alloy and Ca-contained alloy both occur at the edges between the interdendritic eutectics and the α-Mg matrix. Failure of AZ91D alloy is brittle quasi-cleavage fracture, while Ca addition makes the failure tend to be cleavage.
The Influence of Gear Parameters on Oil Film Thickness of Tooth Surface
Authors: Liu Li Hong , Li Zhan Ni , Cao Han Bing
Published: August 2011

Applying elastic-hydrodynamic lubrication theory, oil film thickness of tooth surface was studies in accordance with the quasi-steady state. This paper focused on the influence of gear parameters such as gear ratio, module and center distance on the thickness of oil film of tooth flank. The results show, as speed ratio increases, oil film thickness increases significantly. When the number of teeth is fixed, oil film thickness increases significantly with the increase of module. When center distance is fixed, oil film thickness declines greatly with the increase of module in both into meshing and out of meshing points. Therefore when center distance is fixed, less module and more teeth are selected，on the condition that gear intensity is met. By results analyzing, the minimal oil film thickness may occur in the single tooth meshing area and into meshing or out of meshing points.
Business Process Management in Sequential Manufacturing and its Realization of YAWL-Based
Authors: Shi Ya Fen , Liu Hong Jun , Zheng Jun Jia
Published: August 2011

Starting with features of production in Sequential Manufacturing industries, this paper integrated the four stages -modeling, execution, management, and optimization- of Business Process Management (BPM) into related links of production in Sequential Manufacturing. Therefore, a BPM model orienting to Sequential Manufacturing (SMBPM) was constructed, and then applied into a Chemical Enterprise. Consequently， remarkable achievements was gained in aspects of business process combing, bottleneck analysis and its optimization, etc. At last, with the support of the YAWL, the automatic execution of BPM in sequential manufacturing was explored.
Study on Industry Process of the Rubber Anti-Oxidant RD
Authors: Liu Yu , Gao Qin Yu , Liu Lian Xin , Shi Guang Xia
Published: August 2011

This paper studied on the industry synthesis process of anti-oxidant RD ((2,2,4- trimethyl-1,2-dihydro- quinoline polymer (C12H15N)n.n=2-4)) .The content of dimer, trimer and tetramer of RD were taken as the inspection targets, used the orthogonal design method, and take the ratios of keto-amine, the reaction time, the reaction temperatures and the ratios of catalyst acid-amine as inspect factors to optimized reaction condition. The result indicated that the best ratio of keto-amine is 6.5:1, the reaction time is 6 hours, the range of the reaction temperature is 115-120°C, the beat ratio of acid-amine is 0.2: 1 (the proportion is the concentration ratio for mole). Under the optimization conditions, the yield stability of RD.
Cementite Spheroidization of Drawn Wire during Isothermal Treatment
Authors: Fang Feng , Hu Xian Jun , Chen Shao Hui , Jiang Jian Qing
Published: August 2011

Lamellar cementite will be spheroidized in drawn pearlitic steel wire during galvanization process. To understand the evolution of the microstructure in this process, effects of isothermal time on microstructure of drawn pearlitic steel wires were investigated by using scanning electron microscope (SEM), transmission electron microscope (TEM) and DSC Technique. Experimental results showed that the lamellar cementite would transform to spheroidized cementite during the isothermal treatment. During the heating process, no endothermic or exothermic peak existed in pearlitic strand, while an obvious exothermic peak appeared in cold drawn pearlitic wire at about 380°C. It results from the spheroidization of lamellar cementite. The dislocation density was very low in pearlitic strand, but the dislocation density increased shapely after drawing. During the isothermal treatment at 450°C, the high dislocation density zone disappeared and some cementite became spheroidized. The cementite spheroidization phenomena first began at the boundary of pearlitic blocks or grains, and then in the high dislocation density zone in pearlitic blocks.
A Rapid Field Calibrating Method for MIMU
Authors: Fan Yu Bao , Li Jie , Wang Bo , Tian Xiao Chun , Liu Jun
Published: August 2011

When the Micro Inertial Measurement Unit is been placed randomly in the case of stationary, the sum vectors that measured by the inertial devices configured orthogonally along three axis, are constant vectors. In view of the above objective facts, a field calibration method of micro inertial measurement unit was proposed. On the base of the establishment and optimization of calibration model, all parameters to be calibrated can be obtained through the least square by the ellipsoid fitting, with the result of high-precision field calibration for micro inertial measurement unit. Finally, a filed calibration program for micro inertial measurement unit is scheduled reasonably. The experiment results show that the method has such characteristics such as easily-operation, time-saving, higher calibration accuracy, and not depending on the baseline direction and datum offered by precision instruments. Especially, it fits for inertial measurement systems which work short time and ask for high accuracy. In addition, it can also significantly increase the measurement accuracy of micro inertial measurement system in practical application.
Effects of Ti(C,N) Nanoparticles on Mechanical Properties of the Si3N4 Ceramics
Authors: Li Qian , Zhu Fu Sheng , Xiu Zhi Meng , Sun Xu Dong
Published: August 2011

Si3N4-Ti(C,N) nanocomposites fabricated by vacuum hot pressing with Al2O3 and Y2O3 as additives were investigated. The results showed that the α-Si3N4 phase converted completely into whisker-shaped β-Si3N4 grains after vacuum sintering at 1700°C. Suitable addition and well dispersion of the Ti(C,N) particles can restrained the lateral growth of the β-Si3N4 grains, increasing aspect ratio of the β-Si3N4 grains and improving bending strength of the composites. Fracture toughness of the composites is higher than that of the β-Si3N4 ceramics, and the main toughening mechanism is crack bridging due to the higher aspect ratio of the β-Si3N4 grains.With the addition of 1vol% of Ti(C,N), the composite has a relative density of 99.31%, Vicker’s hardness of 15.9 GPa, bending strength of 993 MPa, and fracture toughness of 9.9 MPa·m1/2.
Impedance Control of Wind Turbine Blade Grinding Robot
Authors: Bu Chi Wu , Zhang Li Xun
Published: August 2011

A robot system is present for the wind turbine blade grinding work. The robot is a mobile manipulator equipped with a grinding tool. In order to realize the compliant control of the operation force, a robust impedance controller is present in the presence of coupling factors between the mobile platform and manipulator, modeling uncertainties and existing bounded disturbances. The proposed control strategies guarantee that the system motion converges to the desired manifold and the desired constraint force. Simulation experiment has been done and the experiment results show that, the presented control method can realize the robust control of mobile manipulator, and thus show the effectiveness and correctness of the designed controller.
Influence of Structure Parameters on Compressive Behavior of Aluminum Foam
Authors: Wang Fang , Wang Lu Cai , Zhang Zhi Min
Published: August 2011

Foamed aluminum has been recently developed as one of new structure functional materials due mainly to its excellent properties such as energy absorption property. It is significant to investigate the compressive behavior and energy absorption property of foamed aluminum under the condition of static and dynamic loading. The compressive deformation behavior of foamed aluminum with open pore structure was experimentally studied and the effects of the porosity, the type of materials, the pore size and the sample size were discussed in detail by means of the orthogonal experiments. The results showed that the type of materials had the most evident influence on the compressive property of foamed aluminum among the factors investigated, and that the size effects of the experimental results were observed.
Research on Extracting Skeleton of Mechanism
Authors: Sui Tian Zhong , Wang Lei , Jia Pei Chao
Published: August 2011

The model of extracting a skeleton of mechanism is established from an existed three-dimensional CAD product model. Using assembly features, a recomposition of assembly information is carried out. At same time, geometric primitives are defined and classified. And according to the information, kinematic pairs are distinguished and matched. Using the given methods, a prototype system extracting and drawing a skeleton of mechanism is developed. Extracting a skeleton of mechanism from digital mockup has been realized primarily, which can deal with rotation pair, sliding pair, gear pair and multi-pair components consisting of these kinematic pairs. Finally, the paper demonstrates the feasibility of extracting a skeleton of mechanism by an application instances.
Experimental Study on Thermal Contact Resistance between Cuprum and Aluminum
Authors: Ji Song , Huang Hai Ming , Huang Guo
Published: August 2011

Cuprum and aluminium are common thermal conductive materials in daily life. Thermal contact resistance is quite complex and depends on many parameters including surface characteristics of the interfacial region, temperature and contact pressure. In this paper, experimental equipment is invented and different working conditions are designed for studying the relationship of thermal contact resistance and temperature between cuprum and aluminium. Experimental results showed that thermal contact resistance will decrease obviously in a period of temperature, and after that period, thermal contact resistance will almost be a constant. These results would be a certain benefit to practical application of cuprum and aluminum.
Acoustic Emission Behavior during Fatigue Crack of API5LX70 Gas Pipeline Steel
Authors: Yusof M.F.M. , Nizwan C.K.E. , Jamaludin Nordin , Abdullah S.
Published: August 2011

This paper present Acoustic Emission (AE) generated during fatigue mechanism of API5LX70 steel which was widely use as gas pipeline materials. Fully reverse (R=-1) constant amplitude fatigue test were done with four different stress amplitudes which were 437.5MPa, 406.25Mpa, 390.6MPa and 359.4MPa respectively. An observation from those tests shows that AE Count gives a significant value during cyclic softening and bauschinger effect. Crack initiation indicated by rapid increase of AE count values at positive peak stress and followed by high AE count values around zero stress which indicate crack closure phenomena. Among all four tests, it was show that AE activity from fatigue test with amplitude of 359.4MPa can be significantly divided into 3 region which correspond to crack incubation stage, microplastic and slip plane formation stage and crack initiation and propagation stage. Further analysis was done by separating AE signals from those 3 regions into 6 different groups. Ten AE signatures from each group were selected to calculate AE RMS and AE kurtosis. Analyses on AE RMS which correspond to overall energy of the signal were useful to indicate the microplastic and slip plane formation stage and crack initiation and propagation stage while AE kurtosis was useful in indicating crack stage including initiation, propagation and closure stage.
Fatigue Performance Study of E36 Steel Welding Joint
Authors: Song Z.X. , Wang Dong Po , Wei G.A. , Yang C.H.
Published: August 2011

Fatigue test was carried out on E36 steel no reinforcement welding joint under the same constant amplitude load with ultrasound fatigue tester independent designed by Tianjin University. Test results showed that the specimen would enter infinite life area after 1 x 109 cycle times; All broken specimens fractured in the welding seam. We observed fracture surface using SEM and found all the crack initiation from defects. This paper further analysed the influence of nature, size, position, and distribution of defects on fatigue life.
Effects of Chemical Structure on Adsorption of Polycarboxylate Superplasticizers on Cement Particles
Authors: Lv Sheng Hua , Gao Rui Jun , Duan Jian Ping
Published: August 2011

Superplasticizers with various of length of side chains, density of the carboxylic (-COO-) and sulfonic groups (-SO3-) have been synthesized based on different monomers and ratios. The effects of these structural factors on the properties of cement pastes were investigated though measurements of paste fluidity, adsorption amount and Zeta potential (ζ-potential). The results indicated that the higher density of -COO- and -SO3- and the longer of polyoxyethylene (PEO) side chains contributed to the dispersion and adsorption amount of cement pastes in the presence of the same dosage of polycarbosylate superplasticizer. The results indicate that -COO- and -SO3- mainly provide electrostatic repulsion effects and PEO side chains contribute to the steric hindrance repulsion during the process of hydration of cement.
Nanostructure Evolution of Expanded Graphite during High-Energy Ball-Milling
Authors: Duan Wen Yan
Published: August 2011

Expanded graphite (EG) was ball-milled in a high-energy planetary-type mill under an air atmosphere. The X-ray diffraction patterns of the products show that during the milling process (up to 100 h), the out-of-plane (Lc) and in-plane (La) crystallite sizes decrease gradually from 15.4 to 11.3 nm and 24.1 to 15.5 nm, respectively. The value of Lc/La, which is used to estimate the shape of the crystallites, increases gradually from 0.64 to 0.73. Compared with most of natural graphite, this Lc decrease degree of EG is far lower. This increased value of Lc/La indicates that the crystallites of the milled EG become thicker and steeper, which is contrary to the case for natural graphite.
Preparation and Electrochemical Properties of VO2(B) Nanobelts
Authors: Li Hou Bin , Fan Mei Juan , Zhang Yi Fu , Huang Chi , Xie Guang Yong , Liu Xing Hai
Published: August 2011

VO2(B) nanobelts have been successfully prepared in V2O5 and water mixed suspension assisted by polyvinyl alcohol (PVA) via a mild hydrothermal approach. The as-obtained VO2 nanobelts are several hundred nanometers to several micrometers long, typically 100-300 nm wide and about 20-30 nm thick. It was found that PVA could not only act as the reducing reagent but also as the structure-directing reagent. Besides, the PVA-assisted solid-solution-solid (SSS) transformation mechanism was proposed to illuminate the possible formation mechanism of VO2(B) nanobelts. Furthermore, the electrochemical properties of VO2(B) nanobelts were studied and they exhibited a high initial discharge capacity of 268 mAh/g, indicating that VO2(B) nanoblets are promising electrode materials in lithium battery.