bluuebunny/crossref_metadata_2025 huggingface dataset:
Analytic Model for Rock Pressure of Circular Opening under High Ground Stress
Authors: Li Wen Pei , Wang De Rong , Zhou Bin , Qian Yue Hong
Published: September 2011

A two dimension atypical elastoplastic model was introduced to study the problem of rock pressure in engineering excavation under high ground stress. This model was established on the base of description of slip line grids in local orthogonal curvilinear coordinate, in which discontinuity of displacement field in excavation was depicted with a combination of two smooth functions. A analytic model for rock pressure of circular opening was given through strict mathematic deduction. Rock pressure of opening is quite less than ground stress, which demonstrates that bearing capability of surrounding rock plays an important role. It is concluded that depth, size and shape of opening, physical and mechanical properties of surrounding rock, and support rock pressure of circular opening have great influence on rock pressure.
Study on the Field Dynamics of the Seal Cavity Flow Field for High Parameters Bellows Mechanical Seal
Authors: Meng Wei An , Ahmat Mutellip , Yusup Nijat , Shavkat Asiye
Published: September 2011

Based on the computational fluid dynamics (CFD) theory and numerical simulation methods, the seal cavity flow field for the bellows mechanical seal under such the high temperature, high pressure, high-speed as complex working conditions was numerically simulated, and the temperature field, velocity field, pressure field, turbulent kinetic energy and the flow field vorticity distribution of the medium of the seal cavity were obtained, the three-dimensional fluid flow in the seal cavity, the heat transfer characteristics and the impact on the sealing performance were analyzed in this researching.
The Influence of Urban Ecological Environment on Funeral Building Environment as Landscape Patches
Authors: Li Bing
Published: September 2011

Funeral building environment is part of the ecological system, it undertakes important duties like human burial, urban cultural landscape and tourism, and urban development. Funeral building environment landscape as patch design is the important tache of space landscape construction and development. It should aim at restoring local ecological environment, providing city environmental services, and helping to recover ecosystem and biodiversity that have been destroyed. It will repair the damages like biological component damage caused by urbanization, natural biological communities and species declining and urban ecological system stability destruction, so as to promote the development of funeral building ecological environment, and create a development environment with man and nature in perfect harmony.
Research of the Differences on Subjective Evaluation of Environment between Professional Personnel and Unprofessional Personnel
Authors: Yang Yu Nan , Li Hui , Xiang Fei
Published: September 2011

This article compares the differences of evaluating the same environment between professional personnel and unprofessional personnel whose culture backgrounds are different. It uses the method of Subjective Evaluation of Built Environment and modern mathematical statistic. This evaluation object is the campus of Three Gorges University, in Hubei. The comparison adopts these methods such as average values comparison, one-way variance analysis, and regression analysis. According to the evaluation result, it analyzes the differences of the two groups about understanding environment.
Study on Ultimate Bearing Capacity and Anti-Slip of the Stud
Authors: Dai Yi Min , Yan Xu Guang , Chen Jing , Wang Xiang Jun
Published: September 2011

Based on the test data of twelve push-out specimens with different holes filling different materials,the paper compared and analyzed the capacity and the corresponding slip value of the stud shear connector. The results show that, as to the two different kinds of holes shape ,the strength of the stud shear connectors of square push-out specimens was huger than that of circular specimens with the same condition; the strength of stud shear connectors in steel-concrete composite structure was decided by the strength of concrete surrounding the shear in the holes, with increasing concrete strength, the strength of stud shear connectors improved greatly; The outputs of this study are very useful for further understanding of the characteristics of the stud,it is also expected that the results presented in this paper should be valuable for the design of the composite beams.
Application of Fuzzy Mathematics and Comprehensive Assessment in Campus Architecture Safety Assessment
Authors: Zhang Ye Min , Xu Yue
Published: September 2011

This article introduces fuzzy mathematics and comprehensive assessment in campus architecture safety assessment, this method can help to make an effective multi-factor decision in campus architecture safety assessment, making the assessment result more objective, rational and effective. Dalian jiaotong university comprehensive teaching building which finished in Port of Lushun campus is selected at the end of the article to explain the whole process of the application of fuzzy mathematics and comprehensive assessment in campus architecture safety assessment.
A CAD Mapping Study Based on a VB Blasting Crater
Authors: Liu Hong Xing , Fu Qun Ying , Meng Zhi Qiang
Published: September 2011

Charge weight is an important consideration when calculating for the blasting crater. The main parameters affecting the blasting crater are the rock type, minimum amount of chemicals consumed, and resistance lines. Although only a few parameters influence the blasting crater, calculating and speadsheeting require a large amount of work and furnish results that are not intuitive. Moreover, the calculation of blasting crater parameters takes time. The current study calculated the parameters using Visual Basic to illustrate a fast spreadsheeting and mapping method using Computer-Aided Design, the design for the charge until the supporting role.
Improved PSO in Water Supply Systems Based on AHP-RS and RBF Neural Network
Authors: Wang Ao Jie , Liu Chao Lue
Published: September 2011

A evaluation model based on the integration of analytic hierarchy process(AHP)-rough set theory (RS) and radial basic function (RBF) neural network is put forward for grasping the hydropower project financing risk.The Particle Swarm Optimization (PSO) algorithm is implemented to optimize the node numbers of the hidden layers in the model. The study indicates that the AHP-RS and RBF neural network connecting with improved PSO method is an attractive alternative to the conventional regression analysis method in modeling water distribution systems.
Analysis on Architectural Bamboo Surface
Authors: Liu Qian , Lin Tao
Published: September 2011

Architectural surface is a hot topic attracting more and more attention of designers. With the deepening of surface research, traditional building materials are coming back to the scope of contemporary architectural design. Under such a background, there appears a batch of bamboo surface buildings. The essay analyzes the performance of these buildings in different types and predicts the future of architectural bamboo surface.
Calculation and Application of Instability Critical Load on Cuplock Scaffold
Authors: Chen Qing Cun
Published: September 2011

For the stability of scaffold commonly used in civil engineering, the continuous compressing bar calculation method with multi elastic supports and multi nodes is adopted with the weight of the bar considered based on a variety of traditional method. It is applied in the scaffold design and calculations of Yuping Yihe Bridge of Shandong Linyi. The calculating results show that, in general, the impact of the weight of the scaffold itself on the critical load can be ignored. But when the scaffold weight is large, the critical load has decreasing decent. The scaffold design proposed based on this method proved reasonable and reliable and ensured the smooth progress of the construction.
Study on the Influencing Factors under Dynamic Drainage Consolidation
Authors: Xue Ru , Hu Juan
Published: September 2011

Because of the Dynamic Drainage Consolidation method’s complexity, the dynamic characteristics of soft soil is not be described by conventional analytic method. In this paper, Numerical simulation was conducted by use of FLAC3D. And effect of reinforcement was analyzed under the different influential factors. These factors include rammer weight, rammer falling distance, rammer radius and ramming energy. Furthermore, the field test was carried out to verify the numerical simulation, the conclusions have theoretical guidance meaning for researching the consolidation mechanics and improving the construction method of Dynamic Drainage Consolidation.
Construction of Processing Model for Massive Terrain Data Used in Three-Dimensional Terrain Visualization
Authors: Yang Ming Qiang , Wei Liang
Published: September 2011

Based on the analysis of various kinds of terrain data used in applications of three-dimensional terrain visualization, this paper puts forward a preprocessing method named hierarchical blocked processing for massive terrain data, and obtains relevant mathematical models and algorithm requirements.
A Simplified Estimation of Critical Pedestrian Number on Lateral Vibrating Footbridge Based on Social Force Model
Authors: Ye Huan , Song Zhi Gang
Published: September 2011

Abstract. Lateral pedestrian loads and flexible footbridge form a dynamic interaction system, which has a special lock-in phenomenon and results the instability of the dynamic system when the pedestrian number reaches certain critical value. A simplified theoretical equation to model the dynamic interaction system and to estimate critical pedestrian number is proposed. The lateral pedestrian loads resulted by structural vibration is first analyzed from a view point of social force model. And then, combined with structural vibration equation, the control differential equation for describing the dynamic interaction system is proposed. The control equation explains why the lock-in phenomenon is resulted and how to estimate the critical pedestrian number. Two typical footbridges are investigated and the results show that critical pedestrian number estimated by the model is more close to those by field observation.
An Evaluation of the Level of Liquefaction in an Iron Mine in the Central Henan Transit Railway Line Project
Authors: Qu Shi Jie , Liu Ji Fei , Liu Hong Xing
Published: September 2011

Soil liquefaction is extremely detrimental to the Central Henan transit railway line project. The present study proposes a preliminary design to evaluate the effects of liquefaction and to determine the parameters and protective measures that need to be implemented. The geological properties, clay content, groundwater level, and the thickness of the overlying non-liquefied soil were initially determined. Then, a standard penetration test was employed to analyse the soil liquefaction potential in an iron mine in the Central Henan rail transport project. The evaluation of similar engineering project sites with middle-class areas vulnerable to liquefaction is important to determine the necessary anti-liquefaction measures.
Study on Response of Reinforced Concrete Beam under Accidental Impact by Piece Part Model
Authors: Wang De Rong , Feng Shu Fang , Lu Hao
Published: September 2011

At present, there exist many simple and reliable methods to describe the damage degree of reinforced concrete structure induced by low velocity impact. However, the actual fracture process can not be well reflected by the current methods. Therefore, a piece part model, which can well describe the damage process, was put forward. The cracks generated in the concrete beam can be reflected by the interfaces between the elements. In this method, the beam is descretized as the linking system of the steel bar and concrete. The dynamic calculating equation of the beam is deduced on the basis of the internal force and inertia force of the rigid unit and linking piece. The local deformation in the contact region of the beam and the stress-strain state of the beam under low velocity impact can also be calculated by this method. Finally, the advantages of the model were proved by a practice example.
Monitoring and Analysis for Air Defense Shelters in Freeze Soil Region
Authors: Duan Bao Fu , Li Hong Chun , Zhang Yu Kun , Zhang Meng , Li Lei
Published: September 2011

Abstract. Based on the monitored surrounding rock displacement and the settlement of ground surface and structures of No.7381 tunnel in Harbin, major factors which influence the safety of construction are analyzed and discussed. Results of the analyses indicated, enlargement excavation of tunnel has significant effect on the settlement of ground surface but has less effect on surrounding rock displacement and settlement of structures. Enlargement excavation during rainy season relay influences the structures and ground surface, by contrast, it influences the open-cut part a lot especially for the stability of slopes. It is pointed that the scope which seasonally frozen ground influences in open-cut part is larger than that in underground excavation part but have less effect on the displacement of surrounding rock underground. Seasonally frozen ground also leads to a remarkable displacement of ground surface. The application of temporary steel bracing is needed and effective for controlling surrounding rock displacement and the settlement of ground surface.
The Innovation Research about Family of Three’s “Extreme Living Product" in the Context of High Housing Price
Authors: Huang Yi
Published: September 2011

We design an "Extreme Living Product", and through varieties of designing techniques including ambiguous space, clever storage, magic unit type, magic furniture, etc. Making it meet a family of three's basic and decent life demand only with the area of 20 sq.m. Compared with the currently popular single apartment about 40 sq.m on the market which is targeted at single or newly married couples, it is lower in total price, richer in function, wider in applicable objects.
Study on Response of Slope Collapsing and Sliding in Elevation Difference due to Seismic Action
Authors: Cui Fang Peng , Xu Qiang , Yang Kun
Published: September 2011

Spatial distribution of slope mechanical parameters on its collapsing and sliding due to seismic load is studied by applying rock dynamic triaxial shear test and finite difference numerical simulation. The results show that a difference in elevation is evident in response of slope initial collapsing and sliding triggered by seismic dynamic influence, i.e., initial fracturing always originates in the place of slope shoulder. Secondly, critical failure strain of slope body unit decreases with its buried depth, and double factors that critical failure strain decreases and peak ground acceleration increases in slope shoulder result in its initial fracturing. Thirdly, dynamic shear strength of slope body unit decreases with its buried depth, and double factors that dynamic shear strength decreases and peak ground acceleration increases in slope shoulder lead to its initial fracturing. The above results contribute to revealing key controlling factors and dynamic process of slope collapsing and sliding triggered by seismic load.
Dynamic Compaction Prefabricated Drain Soft Foundation Treating Method and its Application
Authors: Liu Hong Wei , Xia Song Lin , Zhao Jin , Zhu Sheng Sheng
Published: September 2011

By Discussing the characteristic of dynamic compaction and principium simply, in order to advance the effcct of improvement of dynamic compaction, dynamic compact ion-prefabricated drain was brought forward, and the strengthened behavior of dynamic compaction-prefabricated drain was discussed briefly,at the same time introducing the test ir-situ of a engineering in which this method is adopted. Based on the result of test, evaluating the practicability and effect of this method, scientifically and reasonably.
The Conceptual Design of High-Rise Structures
Authors: Xue Ming Chen , Zhao Yong Sheng
Published: September 2011

In this paper, the contents, meaning and importance of conceptual design in the high-rise building structure design are explored from the following respects: structural system, facade layout and multi-channel seismic line. It not only provides a strong protection of concept for calculation of high-rise building structures, but also accumulates some experience for the research on conceptual design of high-rise structures.
Typology of Urban Planners
Authors: Shi Jian He
Published: September 2011

In this paper, a town planner currently acts the role of chaos and disorder, classificatory the type of the planners scientific. To planners in the social and political status of the policy influence of the planners as the standard, is divided into norm-based planning, tissue-type planners, commercial planners. On their respective types of behavior and the role of interpretation, with a view to establishing a coordinated and orderly norms regulate behavior, To make the planning our country to a new stage.
Cultural Planning of Residential Area in Historical and Cultural City - Interpretation of Cultural Planning
Authors: Yue Yan , Dai Peng
Published: September 2011

The city is a "stone of the history books", in addition to text; the urban construction is the most important material witness, the buildings in historical and cultural city even more so. Five thousand years of Chinese history in the land of China has left numerous historical and cultural cities, to make the "historical tradition, cultural continuity" and "social progress and modern civilization," integration is a very difficult problem. I participated in Xi'an city, "Fenglin Huafu" residential area the whole process of cultural planning and gain some experience and understanding may have a similar solution to the problem the city has played the role for references.
Planning Control of Automobile Trade Logistics Park: The Case of Auto Parts Logistics Center in TAIAN
Authors: Qi Hui Feng , Chen Dong
Published: September 2011

Automobile Trade Logistics Park is one of the most important industrial zones for specific automobile trade and distribution in auto industry cities. The development control of physical spatial planning has a profound effect on the construction and operation of Automobile Trade Logistics Park. Three factors, including advantages of transportation, geographic features and industrial cluster, influencing the location of Logistics Park are discussed. The scales of automobile trade spaces built recent years in China are compared. Analyzing dual function of commerce and distribution, facilities in Automobile Trade Logistics Park are summarized. According to the arrangement of land use and spatial structure, development intensity of different space types for auto trade is proposed. The final section of this article examines the experience in Regulatory Plan of Auto Parts Logistics Center in TAIAN Hi-tech Industry Development Zone.
A Study of the Suitability Standards of Sports Facilities in Counties Governed by Ankang City
Authors: Huang Ming Hua , Wu Xin , Shi Xiao Nan
Published: September 2011

In this article, writers analysed the current situation of sports facilities development in 9 counties governed by Ankang City, deeply investigated the building, using and demands of sports facilities, draw the conclusions of the origins of problems which existing in current building, programming standards in the counties; considered the development requirements, trends, and related building standards of sports facilities, writers discussed the suitability standards of sports facilities which suit the counties governed by Ankang City; brought forward that the counties should be the most straightforward units of urbanization which accelerate the transform of agricultural population to non-agricultural population. The configuration of sports facilities should satisfy the demand of both urban citizens and populations in surrounding counties and rural area. The suitability standards fit the characteristics of each individual region, moreover, they are provided with pertinence and applicability. Suitability standards should contain two aspects: supporting the construction of facilities system and related standards, they content: facility types, facility dimensions, serving population, index of per thousand people etc.
On Carbon Emissions Measure and its Influencing Factors of Yunnan Province: 1998-2008
Authors: Zhang Ya , Mao You Liang
Published: September 2011

Coming up with the idea of low-carbon economy, numerous studies both at home and abroad on carbon emissions have emerged, nonetheless of which seldom are studies aiming at specific executive agencies and supervisory authorities of government development plan at provincial administrative area level. This paper, by using calculation formulas in carbon emission calculation guide of IPCC and carbon emission coefficient default value, measured the carbon emissions of Yunnan Province during 1998 and 2008 and analyzed relative influencing factors. The study shows economic growth and industrial restructuring increase the carbon emission intensity which is not remarkably affected by energy restructuring. The key to decrease carbon emission intensity is enhancing energy efficiency.
Ecological Footprint Model Parameters Revised Study
Authors: Li Ying , Guo Ting Ting , Zhao Quan Yu
Published: September 2011

In this paper, there is a study about two important parameters equilibrium factor and production factors in the ecological footprint model. According to the domestic and foreign research present situation and application of production factor, based on the need of the city and the more small scale regional evaluation system, the author put forward the concept of city hectare, and set up the way of calculate the equilibrium factor and yield factor, so that provide the guarantee for ecological footprint model in the area for more small scale and the application of regional.
Explores the Hospital Building Design Using the Matrix Principle
Authors: Huang Yun Feng
Published: September 2011

The purpose of this paper is to solve issues in current hospital such as complex process, large time-consumption and monotony of space design. The research in the paper introduced the principle of matrix with sections and departments as elements, streamline traffic as transmission path of signals, people seeing doctor as method of signals. Therefore, a fresh model of hospital design was made. The result of the research showed its guiding line for hospital design under the new condition. The unique feature of the research is that design innovation was made in hospital design by integrating of knowledge of different disciplines.
Study on Ecological Footprint Calculation of Beijing Urban Sewage / Industrial Wastewater
Authors: Li Ying , Guo Ting Ting , Li Pan Pan
Published: September 2011

This article was based on Beijing urban sewage and industrial wastewater treatment, namely, aerobic treatment and anaerobic treatment. According to actual collection and processing methods of sewage and industrial wastewater in rural areas , combined combining with the 2006 IPCC internationally cognition and greenhouse gas calculation that related scholars studied, ecological footprint calculation of Beijing urban sewage and industrial waste water was summarized and developed ,thus laid foundation for the study of Beijing urban ecological carrying capacity .
Design of the Low-Carbon and Ecological Kindergarten
Authors: Li Yan , Xie Kai
Published: September 2011

The public in China have a vague notion of architecture energy conservation, additionally the various and complex geographical position and climate, so the problem of architectural energy dissipation has deteriorated. In terms of architectural energy conservation, this design wholly considered energy conservation and emission reduction in the whole life cycle. The theory of “nonexistence-existence-nonexistence” should be carried out practically and low-carbon, ecological kindergarten will be founded in Huainan by studying and taking advantage all kinds of reasonable energy conservation technology. We should exert a subtle influence on cultivating children’s sense of energy conservation and emission reduction in order to make it be popular in the society which treats children as center.
On the Elements for Developing Contemporary Environment-Friendly Architecture
Authors: Xu Cong Huai , Xiong Jie , Xu Shu Chen
Published: September 2011

This paper, with a view to solve the main problems of the development of China's current green buildings , proposed a new concept : "environment-friendly buildings", meanwhile, introducing it from six aspects ,the technical, artistic, ecology, context, place and emotional in order to explore a path to future development of green buildings in China.
Application of Energy Consumption Simulation in Envelope Energy-Saving Reconstruction of Existing Building
Authors: Cui Yan Qiu , Wei Rui Han , Luo Cai Ling , Miao Ji Kui
Published: September 2011

In order to quantify energy saving effect of existing building envelope reconstruction, the paper makes the envelope reconstruction project of Jinan Lixia Office Building as a case, uses energy consumption simulation software DeST-C to make dynamic simulation analysis on several aspects such as natural room temperature, cold and hot load before and after reconstruction of experimental building in cold area. After reconstruction, accumulative hot load of building obtained by calculation decreases 33%, accumulative cold load decreases 15.67%, total load decreases 21.04% in the whole year, and the results show energy saving reconstruction effect of existing building envelope is remarkable.
An Analysis of the Principle and Implementation Strategies of Ecological Architecture Design
Authors: Zhao Xin
Published: September 2011

environmental pollution and resource scarcity have become urgent problems for the whole society to solve. Therefore, in the construction industry, to realize the ecological building of sustainable development has increasingly become the focus of attention. To apply ecological research theory into building design system, to build sound ecological architecture system, to realize the harmonious coexistence of human living space and natural environment are important development goals for future ecological architecture.
Study of Crack Initiation and Propagation in Rock under Coupled Static and Dynamic Loads
Authors: Zhang Zhi Zhen , Gao Feng , Cui Yang , Shang Xiao Ji
Published: September 2011

In order to research the crack initiation and propagation behavior in rock mass under coupled static and dynamic loads, the crack initiation angle and expansion angle formulas are set up by use of the fracture mechanics theory, then numerical simulation of crack propagation are conducted using software RFPA. The results show that: the crack always extend toward the dynamic stress direction; the bigger of the crack dip, the smaller of the crack initiation angle and the more difficulty of the crack initiation and propagation, meanwhile the less influence to the damage of rock. What’s more, when the crack dip is small, theoretical value and numerical simulation value of initiation angle will be have good uniformity.
Study on Glass Transition and Interface Adhesive Ability of Asphalt Mortar
Authors: Fan Liang , Zhang Yu Zhen , Wang Lin
Published: September 2011

For better understanding on adhesive ability and action mechanism of asphalt mortar, a series of mortar based on Zhong-hai asphalt were prepared and evaluated by the method used in high molecule composite materials. Some influencing factors including temperature, filler-binder ratio and asphalt type were discussed on interface adhesive ability. And some conclusions were conducted. The interface adhesive ability between asphalt and mineral filler will decline as temperature fall, until the glass transition or interface phase break appears in mortar system. To the same mineral filler and asphalt, interface adhesive ability of mortar will declines as filler-binder-ratio increases under a certain temperature, and beyond this temperature, high filler-binder-ratio will upgrade the interface adhesive ability and the whole binding performance of mortar.
Preparation of Portland Cement with Pumice
Authors: Cui Shi Cai , Lv Xing Jun , Liu Jing
Published: September 2011

The portland cement clinker was successfully produced using pumice as the principal materials. Effects of different calcine temperature on cement clinker were studied. Phase compositions of clinker were confirmed by combining the phase diagram with X-ray diffraction. Microstructures of clinker were analyzed by scanning electron microscope. From the result of mechanical property showed that the compression strength of clinker can be reached 35MPa. The result of scanning electron microscope showed that the main hydrating products were CSH gels, AFt and CH crystals, the morphology of which were normal. With the prolongation of hydrating age, the hydrating products were richer and the cement paste was densified.
Influence of Lime Dust on the Pore Structure and Strength of Fly Ash-Cement Paste
Authors: Wu Xiang Hao , Bai Li Zhen , Zhang Cong Kai , Yuan Pan
Published: September 2011

By evaporable water test and compressive strength test, this paper studies on the influence of lime dust on pore structure and compressive strength of fly ash-cement paste. The test results show that: 1) With the volume of lime dust as cement replacement increasing, porosity and big pore to total volume ratio of fly ash-cement paste are gradually raising .However, with the volume of lime dust as fly ash replacement increasing, porosity of fly ash-cement paste decreases gradually, while big pore to total volume ratio firstly increases, and then decreases. 2) Substituting lime dust for isometric cement, compressive strength of fly ash-cement paste containing over 5% lime dust reduces gradually when the proportion of lime dust replacing cement raises. Whereas, substituting lime dust for isometric fly ash, the influence of lime dust content on compressive strength of fly ash-cement paste within less than 6% lime dust is not obvious. But When lime dust content is 9%, the compression strength of fly ash-cement paste increases by 20.0% around.
Study on Impermeability Mechanism of Magnetic Water Concrete
Authors: Wang Yi Xin , Wang Xuan , Yang Zeng Ke
Published: September 2011

The magnetic water can increase the strength of concrete, which can infer that the impermeability of concrete has been improved. According to the reason of permeation of concrete and on the basis of the study of magnetic water concrete by the predecessors, the effects such as hypothesis of the mechanism, action of the cement hydration, concrete workability, water ratio of the concrete, setting time and hardening process on impermeability of magnetic water concrete was studied in this issue. And the mechanism of impermeability of magnetic water concrete is also analyzed.
Architects: From Tool Users to Tool Makers, Exemplified by “Auto-Theater”
Authors: Peng Ji
Published: September 2011

In this paper, a theater design tool, “Auto-theater”, tentatively made by the author is proposed to improve the theater design based on the parameter design. In the past, almost all the architects used the tools made by the software manufactures to draw graphics. Now, a few architects start to make the tools by themselves to generate designs. The primary objective is to help the architects focus themselves from using drawing tools onto making their own design tools, so that they will better understand the architectural rules. The paper describes in detail the development of “Auto-theater”, discusses its application and outlooks its future.
Study on the Performance of Machine-Made Sand Concrete Combined Admixture of Limestone Powder and Substandard Fly Ash
Authors: Xu Guo Qiang , Gao Lin , Wang Hai Xia
Published: September 2011

This paper adopted combined admixture of limestone powder and substandard fly ash to prepare the machine-made sand concrete, and studied its performance, compressive strength and micro-properties. The results showed that this kind of machine-made sand concrete owned a good performance, for its 60min slump loss within the range of 15mm to 85mm; the changes in the ratio of limestone powder to low-quality fly ash had little effect on the its compressive strength; with the increase of the ratio between limestone powder and low-quality fly ash, the Ca(OH)2 diffraction peak also increased; when hydration was up to 120d, the limestone powder was not involved in the hydration reaction.
Engineering Practice of Segmental Assembly in Large Spancurved Bridge by Scaffolds
Authors: Yang Li Jun
Published: September 2011

Part of Xiping railway south cave temple bridge segments are on easement curve. considering the project time limit and construction difficulties of large span curved bridge, the construction team adopted 64m soffit scaffolding composite column structure to assemble the precasted box girder segments ,this method can better solve the technical problems of nonuniform stress distribution in transverse beam and upright tubes of the bracket. Therefore, this paper introduces in details the bracket structure as well as the key construction technologies of segmental beam rand bracket. the experience can provide good reference for similar engineering.
An Empirical Study on E-Commerce Channel Relationships: With the Help of Interdependence Theory
Authors: Wang Yue , Tang Xiao Fei
Published: September 2011

The purpose of this article is to explore the effect of the perceived goal interdependence between distributors with suppliers on e-commerce channel relationships. With the help of interdependence theory, the conceptual model of goal interdependence and distributor interests was developed. Cooperative goals, competitive goals and independent goals were used to explain the outcome variable, economic satisfaction and occupational well-being. The moderating effects of three variables were considered: commitment, trust and specific investments. The hypotheses were tested through a sample survey among more than 1,000 computer distributors in Chengdu, China. Results indicate that distributor cooperative goals positively influence distributor commitment, trust and specific investments, sequentially increases distributor economic satisfaction and occupational well-being. Results are interpreted that distributor cooperative goals is an important contributors for developing successful e-commerce channel relationships.
Evaluation on Structural strength of Inland River Small Ships
Authors: Zhang Jian , Yin Qun
Published: September 2011

A representative inland bulk carrier of 57m long and single-bottom and double-side is analyzed in this paper.Transverse strength of the ship is calculated directly using FEM (Finite Element Method) because of the problem that the length of hatch exceeds requirements in Rules for Building Steel Inland Vessels (2009) .The results show that transverse strength of the ship meets the requirements of structural stress in the rules which provides references for rules revision and structural design of such ships.
Research on the Deformation Mechanism of Outlet High Slope of Some Hydropower Station Diversion Tunnel
Authors: Deng Hua Feng , Zhu Min , Guo Jing , Lu Tao
Published: September 2011

During the operation of outlet high slop of the hydropower station diversion tunnel, the monitoring data shown that the upper slope had an abnormal deformation tendency toward the upstream, which was different from the general slope deformation law. The paper analyzed the deformation mechanism of the high slop outside the hydropower station diversion tunnel in detail based on detailed analysis of the geological data. The analysis shown that the basic reasons of slope deformation were the upper hard and lower soft structure characteristics and the fully developed interlayer shear zone; the excavation unloading, reservoir impounding, reservoir water level change, rainfall, flood discharge atomization, rock weathering, water-rock long-term effects, and some other factors induce and aggravate the rock mass deformation.
Effect of Internal Leakage on an Electro-Hydraulic Servo-Driven Control Valve Performance
Authors: Xie Yu Dong , Liu Yan Jun , Wang Yong
Published: September 2011

The principle of an electro-hydraulic servo-driven control valve used to regulate mixed-gas pressure in combined cycle power plant is introduced. The mathematic model for describing the dead-band characteristics of the electro-hydraulic servo-driven control valve is built. The effect of driving system leakage of the control valve on the performances of the control valve is analyzed. The results show that the dead band of the electro-hydraulic servo-driven control valve increases with the rise of the system leakage, the leakage affects the response rapidity and the control accuracy of the control valve, and the valve control effect on the pressure pulsation of the mixed gas decreases with the increase of the system leakage.
Dike Folk Houses - Vernacular Ecological Architecture of Southeast Henan
Authors: Cheng Yan Yan , Su Yang
Published: September 2011

Through the discourse about basic concepts, principles and methods of vernacular ecological architecture, construct a basic theoretical framework on architectural design and natural ecological environment. From the combination of theory and practice, clarify the design ideas of local ecological architecture and sustainable development thinking in Chinese traditional culture. To analyze ecological character of dike folk houses in Southeast Henan, reflect on and answer the important significance of sustainable development in the new rural construction.
Study on Removal of Uranium (VI) from Acid Leaching Uranium-Containing Wastewater by Modified CMC Polymer
Authors: Zhou Shu Kui , Zeng Guang Ming , Liu Ying Jiu
Published: September 2011

U(VI) of the acid leaching uranium-containing wastewater was adsorbed by modified CMC polymer. The result showed that the grafting rate was found to be 68% on the conditions, i.e. temperature 70~80°C, monomers quality concentration 30~35%, Carboxy methyl cellulose and acrylic acid mass ratio of 10:2.5, contact time 3.5~4h. The uranium adsorption capacity of modified CMC was studied and compared with unmodified CMC. The results also revealed that U(VI) ions uptake rate was rather slow, with 75% of the total amount occurring in the first 60min for Modified CMC Polymer. the optimum experimental conditions were CMC quality concentration 0.10g/L, temperature 25°C, pH 5.0, contact time 100min; under the optimal conditions, the removal of U(VI) was 97.1% and 21% higher than unmodified CMC.
Effect of Crumb Rubber Particle Size and Content on Properties of Crumb Rubber Modified (CRM) Asphalt
Authors: Cao Wei Dong , Liu Shu Tang , Cui Xin Zhuang , Yu Xiao Qing
Published: September 2011

Effects of crumb rubber of different particle sizes (20mesh, 40mesh, 60mesh, 80mesh and120mesh) and contents (10%, 15% and 20% by weight of the total of CRM asphalt) on the properties of CRM asphalt and change rule of performance of CRM asphalt with reaction temperature and time were studied in laboratory. The results indicate that CRM asphalt has the best performance when the particle size of crumb rubber used is 80 mesh and the content is 15%. The performance of CRM asphalt is strongly depended on reaction temperature and time. When reaction temperature is higher than 200°C and time more than 60 minutes, the viscosity of CRM asphalt significantly decline with reaction temperature rising and time delaying. The performance of CRM asphalt starts aging when reaction time more than 4 hours at high temperature. Based on test results, some suggestions for production and application of CRM asphalt are put forward.
The Development and Implementation of Improved Duncan-Chang Constitutive Model in ABAQUS
Authors: Dai Zhi Ping , Zhao Cheng , Zhao Chun Feng
Published: September 2011

As it ignorance the effect of intermediate principal stress, traditional Duncan - Chang model has limitation when applied into geotechnical engineering. It was improved through incorporating the effect of intermediate principal stress based on unified strength theory. Under the help of customized modification platform in ABAQUS, the applicability and stability of the improved model and the reliability of subroutine were validated through simulation of several examples. The results show the improved model can better reflect the deformation behavior of soil through taking the influence of intermediate principal stress into consideration. The improved model in paper can be applied into dense sand, fine sand and clay.
Behavior of HSC with Polypropylene Fibers after Exposure to High Temperatures
Authors: Yan Rui Zhen , Du Hong Xiu , Wang Hui Fang , Wang Yan
Published: September 2011

An experimental research was performed on the compressive strength and splitting tensile strength for HSC with various polypropylene（PP） fibers after exposure to temperatures 300°C, 500°C, 700°C, 900°C. Cubes of 150mm×150mm were designed and fabricated with C60, blended with silica fume and slag, mixed with PP fibers, respectively. These specimens were naturally cooled to room temperature after being heated in an electric furnace. No explosive spalling was observed during the fire test on all HSC with PP fibers. From the results of nine types of concretes, both the compressive strength and splitting tensile strength of HSC with PP fibers decreased with the increase of temperature. Through a series of measurement, the relationships between the mechanical properties and the various PP fibers in HSC were analyzed, including the dosage and length of PP fiber. Based on the comparison in the experimental results, the proposed optimum of PP fiber in HSC was 1.5kg/m3 under the test condition. In addition, PP fiber with the length of 8mm could be more applicable to use.
Effect of pH on the Structural and Magnetic Properties of Magnetite Nanoparticles Synthesised by Co-Precipitation
Authors: Ramadan Wegdan , Kareem Marwa , Hannoyer Béatrice , Saha Shanta
Published: September 2011

Magnetite, Fe3O4, nanoparticles were synthesized using co-precipitation aqueous method at room temperature and at different pH, from 8 to 12.5. The pH value was found to influence greatly the resulting phases and has no significant effect on the particle size. In all cases, magnetite was found to be the main phase but the contribution of Goethite phase was identified clearly with the increase in pH. Significant reduction in saturation magnetization was evident. Structural and magnetic properties of the nanoparticles were examined using; XRD, TEM, Raman Spectroscopy and SQUID.
Effects of Aging Heat Treatment on the Microstructure of Ti-Nb and Ti-Nb-Sn Alloys Employed as Biomaterials
Authors: Lopes Eder S.N. , Cremasco Alessandra , Contieri Rodrigo , Caram Rubens
Published: September 2011

The mechanical behavior of β titanium alloys applied as orthopedic biomaterials depends directly on their microstructural features, and can be improved by tailoring the microstructure through the control of their phase transformations. The aim of this investigation is to discuss phase transformations during the aging heat treatment of β Ti-30Nb and β Ti-30Nb-2Sn alloys and to correlate microstructure and mechanical behavior. The results of high temperature XRD experiments showed decomposition of orthorhombic α” phase, followed by the precipitation of ω and α phases. The mechanical behavior of Ti-Nb and Ti-Nb-Sn alloys was found to be highly sensitive to the microstructural changes caused by the addition of Sn and by heat treatments.
Characterization of the Response of Embedded Thermocouples in Grinding
Authors: Pombo Inigo , Sánchez Jose Antonio , Ortega N. , Izquierdo B. , Plaza S.
Published: September 2011

Temperature measurement in grinding has been a widely analyzed field in the study of the process. Temperatures in grinding are too difficult to measure due to the high gradients in the ground workpiece. A lot of different methods have been employed by many researches in the last years. In this paper the use of thermocouples is analyzed attending to the mathematical characterization of their response. It will be shown that correct modeling of the thermocouple’s response permits the avoidance of the problem of thermal inertia, making thus possible the use commercial thermocouples for temperature measurement in grinding.
Wear Behavior of a Vitrified Bond CBN Wheel by Ultrasonic-Assisted Creep Feed Profile Grinding of Inconel 718
Authors: Tawakoli Taghi , Azarhoushang Bahman , Rasifard Abdolreza
Published: September 2011

Generally in the grinding of modern aviation materials such as nickel-based superalloys, problems frequently occur in terms of burr formation, profile loss of the wheel, high heat generation in the contact zone, high grinding forces as well as low process reliability. A recent and promising method to overcome these technological constraints is the use of ultrasonic assistance, where high-frequency and low amplitude vibrations are superimposed on the movement of the workpiece. This paper presents the design of an ultrasonically vibrated block sonotrode and the experimental investigation of ultrasonically assisted profile grinding of Inconel 718. The profile wear, radial wear of the wheel, grinding forces and surface roughness by ultrasonic-assisted and conventional profile grinding were measured and compared. The obtained results show that the application of ultrasonic vibration can decrease the radial wear of the wheel, profile wear, grinding forces and surface roughness considerably.
Experimental Study on Grinding of a Nickel-Based Alloy Using Vitrified CBN Wheels
Authors: Shi Zhong De , Elfizy Amr , St-Pierre Benoit , Attia Helmi
Published: September 2011

An experimental study is reported on the grinding of a nickel-based alloy using vitrified CBN wheels. This work was motivated by switching the grinding of fir-tree root forms of jet engine blades from creep-feed grinding with conventional abrasive wheels to vitrified CBN wheels. The objective is to explore process limits and practical grinding parameters for judging the switch in terms of overall costs and productivity. Straight surface grinding experiments were conducted with water-based fluid on rectangular blocks at a fixed wheel speed vs = 45 m/s, various depths of cut a = 0.05 - 1.0 mm, and workspeeds vw = 2 - 40 mm/s. Grinding power, forces, surface roughness, and radial wheel wear were measured. Specific material removal rate of 8 mm3/(mm.s) was reached in rough grinding using a wheel dressed for achieving surface roughness Ra = 0.8 µm in finish grinding. It was found that shallow depths of cut combined with fast workspeeds, or less creep-feed modes, are more suitable for achieving high material removal rates with vitrified CBN grinding. Rough grinding is restricted by high grinding temperatures with newly dressed wheels and by chatters with worn wheels.
Wear Characteristics of Various Diamond Tools in Cutting of Tungsten Carbide
Authors: Kubo Akihiko , Mochida Yasushi , Tamaki Junichi , Harano Katsuko , Sumiya Hitoshi , Sharif Ullah A.M.M.
Published: September 2011

Face cutting of tungsten carbide was conducted using two monocrystalline diamond tools and three polycrystalline diamond tools to investigate the wear characteristics in terms of the crystal structure and composition of the diamond. It was found that the wear of the monocrystalline diamond tool depends on the crystal planes that form the rake face and flank face of the cutting tool, and a cleavage fracture occurs when the cutting force acts as a shear force on the (111) crystal plane. The binderless nano-polycrystalline diamond tool exhibits excellent wear resistance beyond those of the sintered polycrystalline diamond tool and chemical vapour deposition polycrystalline diamond tool, as well as better wear resistance than the monocrystalline diamond tool.