bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Cementitious Capillary Crystalline Waterproofing Coating for Underground Concrete Works
Authors: Zhang Yong , Du Xiu Li , Li Yue , Yang Fu Min , Li Zhan Guo
Published: February 2012

Cementitious capillary crystalline waterproofing coating was developed, whose doping quantity of active substances was primarily determined by using orthogonal tests, the doping quantity of the active substances and the cement-sand ratio were optimized, and the formulation of the waterproofing coating was: 50.45% of silicate cement, 40% of quartz sand, 2.4% of assistants and 7.15% of active chemical substances. Test results showed that all the properties of the developed waterproofing coating conform to standard requirements, the bonding strength of wet substrate reached 1.8 MPa, and 28d seepage resistance reached 1.3 MPa.
Transportation Velocity and Crystallization Areas of Sulfate Solution in Concrete
Authors: Ma Kun Lin , Long Guang Cheng , Dai Song Zhi
Published: February 2012

In order to investigate transportation of sulfate solution in concrete and its influence factors, transportation velocity and crystallization areas of sulfate solution in concrete, porosity and pore structure of concrete were tested by methods of transportation crystallization test and evaporable water test. Results show that under temperature (20±2)°C and relative humidity (60±5)％ environment, sulfate solution permeate concrete wall and get to concrete surface in very short time. The decrease of water to binder ratio and addition of mineral mixture to concrete can decrease transportation velocity and crystallization areas of sulfate solution in concrete. The transportation velocity and crystallization areas have great correlation with concrete porosity with pore dia. > 30nm.
Evolution of Capillary Porous Structure in Steam Curing Concrete with Mineral Admixtures
Authors: Ba Ming Fang , Qian Chun Xiang
Published: February 2012

The capillary porous structures of the pre-cast concrete with different initial steam-curing duration were analyzed with MIP techniques. Then the hydration degree of cement, fly ash and slag in pre-cast concrete versus time were obtained respectively by combing the hydrochlorides and EDTA selecting dissolution methods, based on which the corresponding evolution of capillary porosity was determined. The comparison between calculated results and experimental capillary porosity showed that the proposed evolution model of capillary porosity could be adopted to reveal the developing trend of capillary porosity of pre-cast concrete with fly ash and slag under certain curing conditions
Mechanical Properties and Energy Absorption Capability of Closed-Cell Al Alloy Foam
Authors: Yang Wei Han , Wang Zhan Guang , Cai Ping , Hu Jing Zhi
Published: February 2012

Based on compression tests of closed-cell Al alloy foam measured, mchanical properties and energy absorption capability had been investigated. The compressive stress-strain curve of closed-cell Al foam consists of three distinct regions, i.e., the linear elasticity region, the plastic collapse region or brittle crushing region, and the densification region. Formula on energy absorption capability of closed-cell Al alloy foam was presented, which could provide theoretical support for its engineering application.
Mix Proportion Design and Basic Mechanical Properties Experiment of Self-Compacting Lightweight Concrete
Authors: Liu Xi Jun , Wang Yu Mei
Published: February 2012

In order to get the requirements of workability and basic mechanical properties of self-compacting lightweight aggregate concrete, fixed sand and gravel volume method and overall calculation method are used to mix design. Slump flow and L-box tests are used to test the workability of self-compacting lightweight aggregate concrete, the strength increasing and the final value are tested by compression tests. For contrast, a set of common concrete is selected to compare the differences of efficiency. Tests indicated that the 5 groups of self-compacting lightweight aggregate concrete can get the requirements of workability and compressive strength, and the structure efficiency can be significantly higher than normal concrete.
Theoretical and Experimental Analysis on Magnetron Sputtering Film Thickness Distribution
Authors: Han Ya Ping , Wang Shao Ze , Wang Qing Wen , Wang Jin Xin , Luo Ming Hai
Published: February 2012

Thickness uniformity of film influences the properties of deposit films greatly by using magnetron sputtering. A magnetron sputtering model is developed , film thickness distribution is got by theoretical deduction, and the data is analyzed by Matlab and Mathematica. The result shows that film thickness is the function of radius, and the uniformity is connected to time. The related experiment was conducted and corresponded with the theory.
Building Roof Waterproof Application of a New Material
Authors: Gong Wen Ye , He Dong Lin
Published: February 2012

The traditional waterproof membrane on roof such as asphalt membrane, SBS and APP modified bitumen membrane has poor weather resistance and poor durability. So, leakage phenomenon often appears. While GT waterproof material, each property is superior, the construction is simple and efficient, which applied to waterproof of building roof has broad prospects, can thoroughly cure roof leakage problems. According to the properties, characteristics and applicability of GT material, analysis its technology points of base treatment and construction measures applied in roof waterproof.
Effects of Shell and Calcium Carbonate on Properties of Portland Cement
Authors: Wang Gui Yun , Lu Ling Chao , Wang Shou De
Published: February 2012

Different amounts of shell and calcium carbonate were added into the Portland cement, their influences on the compressive strength, sulfate corrosion resistance, hydration heat and porosity of the hardened cement paste were studied. Results show that with the increasing of shell content, the compressive strength decreases, however, modest reduction; as the increase of calcium carbonate content, the strength first increases and then decreases, the compressive strength reaches the highest value when the content is 15%. After addition of shell and calcium carbonate, the initial hydration reaction rate accelerates, meanwhile the induction period and acceleration period are brought forward. With the raising of shell and calcium carbonate content, the corrosion resistance coefficient increases gradually, and the sulfate corrosion resistance increases as well. The proportion of the harmless hole which diameter is smaller than 50nm increases after adding the shell and calcium carbonate, it’s beneficial to improve the performance of concrete.
The Application of Basalt Fiber in Building Materials
Authors: Wu Rui Hong
Published: February 2012

As a new building materials, mechanical properties﹑physical properties and chemical properties of basalt fibers are studied in the paper. Compared with other building materials, the basalt fibers have better tensile strength than the E-glass fibers, greater failure strain than the carbon fibers as well as good resistance to chemical environment, impact load and fire with less poisonous fumes. In addition, the basalt fibers do not contain any other additives in a single producing process, which makes additional advantage in cost. In addition, the applications of basalt fibers in building materials are emphatically elaborated.
Study on Compressive Strength and Flexural Properties of Igneous Fiber Hydraulic Concrete
Authors: Wang Jian Dong , Liu Hua Ting , Zhang Jun Zhi , Wu Ling Jie
Published: February 2012

This study investigates the compressive strength, flexural strength and flexural modulus of the short-chopped igneous fiber reinforced concrete, short-chopped carbon fiber reinforced concrete and plain concrete. Experimental results show that both short-chopped igneous fiber and carbon fiber can improve the compressive strength and flexural behavior of the concrete significantly, and the reinforcing effectiveness of igneous fiber is better that of carbon fiber.
Influence of Reduction Temperature on Specific Surface Area of SSI
Authors: Li Jun Guo , Tian Wei , Li Shou Zhang
Published: February 2012

Spherical sponge iron (SSI) with high activity and intension possesses potential characteristics to be utilized as wastewater treatment material. Influence of reductive temperature on specific surface area and distribution of holes with different diameter were investigated. It was suggested that reductive temperature has significant influence on the specific surface area of SSI. When the temperature was controlled at T1 to T5, the porosity was 42.57% to 51.91%. When the temperature was lower than T4, the specific surface area was belonged to the range from 1.867 m2/g and 3.089 m2/g, while which declined sharply to 0.616 m2/g as the temperature increased to T5. When the reductive temperature was lower than T4, mean pore size varied from 275.7 nm to 449.6 nm, while which increased abruptly to 1270 nm as temperature increased T5. To utilize the SSI in wastewater treatment to remove pollutants, T4 was the optimized temperature.
Failure Analysis of Laminate on Influence of the Hole
Authors: Yang Yin Huan
Published: February 2012

Failure process of laminated composites is performed by progressive failure analysis method. A modified form of Hashin’s failure criterion by Shokrieh is used to investigate the failure, where a sudden degradation model is proposed to reduce engineering material constants. The numerical study of laminated composites is implemented in ANSYS Parametric Design Language (APDL). The initiation and propagation of local damage and response of laminated composite structures from initial loading and ultimate failure are predicted. The model has been validated by comparing numerical results with existing experimental results. And then failure analysis of specimen fabricated from M40J/Ag80 on influence of the hole has been performed by the proposed model.
Study on the Cracking Sensitivity of Recycled Fine Aggregate Concrete Based on Orthogonal Experiment
Authors: Che Cheng Cheng , Li Dong , Chen Fu Dan
Published: February 2012

Using recycled fine aggregate in the practical engineering provides waste concrete a sustainable utilization road and the cracking property of recycled fine aggregate concrete immediately influence the service life of concrete. The paper consults ICBO standard, carries out stationary plate method and it puts importance on the influences on the concrete, the particle size, the replacement rate of recycled fine aggregate and mineral mixes. The result indicates that the fine particles between 0 and 0.15mm are not good for the crack resistance of recycled concrete. The replacement rate of recycled fine aggregate should be controlled less than 50%. Adding a certain amount of fly ash could enhance to some extent the crack resistance of recycled fine aggregate concrete. But the plastic cracking risk of recycled fine aggregate concrete increases because of the adding silica fume.
Based on the Mathematical Modeling Thought Method Exploration
Authors: Liu Zhi Bin
Published: February 2012

Mathematical modeling is a mathematical thinking method, is using the mathematical language and means, through the abstract, simplified can approximate solution actual problem a powerful mathematical method. In this paper, according to the teaching of the specific example analyzed of mathematical modeling of understanding, base the teaching material, mathematical modeling process, strengthen the revealing of mathematical modeling consciousness training, improve the ability of mathematical modeling. Mathematical modeling thought and method of the seepage, must be run through the teaching process throughout, must have the plan, a step-by-step and destination permeates gradually.
Parameter Analysis on the Load-Carrying Capacity of Composite Walls with Concrete Core Columns and Fiber-Reinforced Gypsum Panel
Authors: Gu Yan , Jiang Xin Liang
Published: February 2012

Based on the test results of composed-wall-specimens made of fiber-reinforced gypsum panel and concrete core columns, ADINA finite element models of composite walls were established in this paper. Parametric studies were conducted on this basis, which would investigate the effects of fiber-reinforced gypsum panel, concrete core rate, height-width ratio and concrete strength on the load-carrying capacity of the composite walls.
Influence of Compounded Mineral Admixtures on Shrinkage and Early-Age Cracking Behaviors of Concrete
Authors: Wang Xue Fang , Zheng Jian Lan
Published: February 2012

Influence of compounded mineral admixtures on shrinkage and early-age cracking behaviors of concrete was studied, based on the fellow factors: fly ash to blast furnace slag(denoted as BSF) ratio, fly ash-metakaolin ratio, BSF-silica fume ratio. Research shows that the Pozzolanic admixtures compounded with cementitious admixtures have complementary and synergistic effect for hydration progress of concrete, which can enhance the volume stability and cracking behaviors of concrete. However, the pozzolanic admixture compounded with other pozzolanic admixture, two pozzolanic admixtures will grab Ca(OH)2 resource. And then if the dosage of mineral admixture is higher, the compounding will result to decrease the volume stability and cracking behaviors of concrete.
Leaching Mechanism of Cr(VI) from Chromite Ore Processing Residue with Nitric Acid
Authors: Xiao Kai , Li Guo Cheng
Published: February 2012

The leaching behavior of hexavalent chromium (Cr(VI)) and major metal elements relevant to Cr(VI) leaching from chromite ore processing residue (COPR) to HNO3 are investigated by batch leaching tests. According to the test results, aqueous Cr(VI) accounted for 70-80% of the content of total Cr. Cr(VI) concentration was controlled by the dissolution degree of Cr(VI)-bearing minerals (such as hydroandradite) as the pH value ranged from 7.58 to 10.47, and by the adsorption degree of Cr(VI) on metal amorphous precipitates as pH value ranged from 6.18 to 7.58. It takes time for the penetration of acid into COPR and the release of alkalinity from the interior zone of particles. So, it could be speculated that the fine-sized particles would react with acid more effectively. 14mol HNO3 per 1kg COPR is needed to maintain the pH value to achieve 7.5 for 48 hours. This indicates the acid neutralization capacity of the test sample is relatively large. It suggests that the application of acid treatment method for COPR disposal is feasible but costly.
The Research on Hygrothermal Characterization of Eco-Fiber Materials
Authors: Yu Shui , Zhang Xu
Published: February 2012

The development and research of new thermal insulation materials become a hot point due to the demand of building energy efficiency and high hygrothermal environment. Although there are many kinds of insulation materials in Chinese market, most of them are made from oil. It is very important to develop new thermal insulation materials to decrease the emission of CO2 and the use of non-renewable energy. The new materials have the function of reducing carbon emissions, improving the insulation performance of building envelope and indoor hygrothermal environment. However the research on hygrothermal characteristic of eco-fiber production is still kind of new work, such as water vapor permeability, thermal conductivity, water absorption coefficient, and isothermal sorption curve and so on, especially water absorption coefficient which doesn’t obey the classical model, according to the classical standards.
Development of Cementitious Materials with High Resistance to Sulfate Attack by a Combination of Emulsified Asphalt and Fly Ash
Authors: Long Guang Cheng , Li Zhe , Ma Kun Lin , Xie You Jun
Published: February 2012

Attack of sulfate crystallization and chemical interaction between sulfate and hydration product is one of the most important factors responsible for degradation of cementitious materials. This study investigates the effects of emulsified asphalt and fly ash as well as their combination on resistance of mortar to physicochemical attack of sulfate in order to develop high performance cementitious materials with high resistance to sulfate attack. The partly-submerged experiment with 5% Na2SO4 solution is designed to simulate physicochemical attack of sulfate salt on sample. Results indicate that, compared with fly ash, addition of emulsified asphalt is more effective in improving the resistance of mortar sample to physical crystallization role and chemical attack of sulfate. Moreover, a combination of fly ash and emulsified asphalt can further enhance the resistance of cementitious materials to physicochemical attack of sulfate, which results from the improvement of microstructure, reduction of CH product and increase of ductility of sample.
Research on Performance Improvement of Confined Recycled Aggregate Concrete
Authors: Geng Jian Bin , Zeng Zhi Xing
Published: February 2012

Presently large amount of slurry are generated in natural stone processing plants with an important on the environment and humans. But relative to normal concrete, the Recycled Aggregate Concrete (RAC) has unstable properties and weaker strength. Such inadequacies can be overcome though applied the confinement to the RAC. In this paper, several reinforcement systems are introduced to be used in the RAC. Analysis showed that the strength and deformation capacity are highly increased, while the shrinkage is reduced and deformation is obviously improved.
How to Appreciate the Beauty of Wood as Building Materials
Authors: Zhu Jia Yi , Tai Hui Xin
Published: February 2012

This paper determines some methods through which we appreciate the beauty of wood as building materials. The paper presents the development of wood application indirectly through human history, and appreciates and demonstrates the beauty of wooden materials from different perspectives.
Ecological Risk Assessment of Heavy Metal Pollution in Soil of Beijing
Authors: Yang Li Yun , Wu Song Tao
Published: February 2012

Based on two different methods, the ecological risk of heavy metals in soils of Beijing was assessed. With the assess method of PaPant ecological risk index, the Rapant ecological risk index of center region is 1.365, which indicates a medium ecological risk, while the other districts of Beijing are in low ecological risk level and the main influential factor is Hg. Based on the assess result by the method of Hakanson potential ecological risk index, The highest value of RI is 141.95, which is still in the low ecological risk level but also close to the lower limit of medium level; the main influential factors is Hg and Cd. Therefore, to focus on the monitoring and management of Cd and Hg in center region is necessary in Beijing.
Comparative Study on the Level of Urban-Rural Integration within Harbin Metropolitan Area Based on Principal Component Analysis Method
Authors: Han Li Hong , Tong Guang Ji , Zuo He
Published: February 2012

This paper establishes a comprehensive evaluation index system of urban-rural integration process, and uses the principal component analysis method to evaluate the urban-rural integration process within Shanghai, Shenyang, Harbin, Chengdu and Zhengzhou metropolitan areas, then ranks the level of urban-rural integration according to the comprehensive score. After comparative analyzing, this paper gives the countermeasures to enhance the level of urban-rural integration within Harbin metropolitan area.
Color Analysis for Historic Buildings in Old Nantong City
Authors: Luo Jing , Guo Wei Min , Wang Xiao Qian
Published: February 2012

In view of the traditional color of historic buildings in old Nantong city is gradually lost and the buildings lack of color planning in the process of large-scale expansion of the city, the color characteristics of Nantong historic buildings are analyzed from the perspectives of the geographical tradition and characteristic time. Meanwhile, the color design method of Nantong historic buildings in architectural renewal are proposed.
The Appearance and Support of Mind-Style Preference and Social Background of the Contemporary Interior Design
Authors: Zhu Zhong Cui
Published: February 2012

According to Schopenhauer, style is the appearance of mind, then, the existence and expression of mind need a broad social environment and social background. What’s more, the formation of style has its own profound social, political, economical and cultural roots. There are a variety of genres in contemporary interior design realm, which has not formed a real style yet, but style preferences have already appeared and became evident increasingly. This paper aims to discuss the style preferences of interior design in current social background, and tries to draw some enlightenment.
The Space Design of Radio and Television Building in the Digital and Network Era
Authors: Zhang Guang Ping , Qi Yu
Published: February 2012

Broadcasting buildings as the embodiment of high-tech, cutting-edge culture and building on behalf of the type of process rigorous, complex architectural features, the rapid development of high public concern. Digital network era of such architectural features to the evolving content of the article studies the construction of a new era of Broadcasting the core characteristics of the design space - open space complex import and application of new technologies and other related issues with a view to create a fit time, sustainable development and change radio and television building benefits.
Study on Structural Morphology of Expressive Force of Architecture
Authors: Xu Wei Qi , Duan Xiang , Wu Ding Feng , Yu Chen
Published: February 2012

By discussing the structural form’s effects on the architectural modelling,this paper elaborates the relationship between structural form and architectural modelling essential factors,and reveals the aesthetic characteristics of the structural morphology as well as how to express structural aesthetics value.Results show that the creative way to achieve the unification of architectural modelling and structural form is basic approach architectural design’s structure manifestation,and sevaral methods of this manifestation are also presented.
Management Problems and Countermeasures of City Outdoor Advertising - Taking Jinan as an Example
Authors: Chen Peng , Zhang Jun Min , Nan Ji
Published: February 2012

Along with the progress of society, the development of the city and economic prosperity, outdoor advertising has achieved great development and plays an increasingly prominent role in the social life. In this paper, the development present situation of outdoor advertising management of Jinan as the starting point, we analyze the problems in the management of outdoor advertising and put forward corresponding countermeasures.
Sequential Homography-Based Alignment for HDR Image Generation
Authors: Barazzetti Luigi , Remondino Fabio , Scaioni Marco
Published: February 2012

Tripoding the camera is a standard solution to acquire aligned images useful for High Dynamic Range photography. On the other hand, the chance to use a hand-held digital camera is surely more practical and attractive for photographers. In this paper we propose a registration algorithm that recovers the alignment of several bracketed images using a progressive combination of homographies estimated from a set of image correspondences.
Evaluation of Forest Fire Indirect Loss
Authors: Di Xue Ying , Cai Hui Ying , Yang Guang , Sun Jian , Zeng Tao
Published: February 2012

Forest fire indirect loss means that a type of loss that does not results from direct damage of a covered cause of loss but is, instead, a consequence of the direct damage loss by forest fire. It is much more difficult to quantify and therefore may go unnoticed by local government. However, forest fire indirect loss is far more costly than direct loss. When reviewing forest fire loss, measure the forest fire indirect loss, as well as the forest fire direct loss, to make sure we are capturing the total impact of forest fire losses. So far, there is no precise classification and calculation for forest fire indirect loss. This paper concentrated on assessing the losses that impacted of forest fire. The results would be a guide for policymakers for developing an appropriate preventive action to reduce the risk and potential indirect loss before the fire occurs.
Damage Localization of Frame Structures Using Seismic Acceleration Response Data
Authors: Huang Ming Chih , Wang Yen Po , Lee Chien Liang
Published: February 2012

In this study, damage localization of frame structures from seismic acceleration responses is explored using the DLV technique and ARX model for system identification. The concept of the DLV method is to identify the members with zero stress under some specific loading patterns derived by interrogating the changes in flexibility matrix of the structure before and after the damage state. Success of the DLV method for damage localization lies on the ability to identify the flexibility matrix. The ARX model, a discrete-time non-parametric auto-regressive system identification technique is adopted to identify the modal parameters (natural frequencies, transfer functions and mode shapes) from which the flexibility matrices of the intact and damaged structures are constructed. To explore the effectiveness of the DLV method, a five-storey steel model frame with diagonal bracings was considered for seismic shaking table tests. The damage conditions of the structure were simulated by partially removing some of the diagonals. With the flexibility matrices of both the intact and damaged structures synthesized on a truncated modal basis, the damage locations have been successfully identified by the DLV method for either single or multiple damage conditions, regardless of the damage locations. This study confirms the potential of the DLV method in the detection of local damages from global seismic response data for frame structures.
A Molecular Dynamics Study for Dissociation of H2 Molecule on Pt(111) Surface
Authors: Tokumasu Takashi
Published: February 2012

The dissociation phenomena of H2 molecule on Pt(111) surface was simulated by Molecular Dynamics (MD) method and the effect of motion of the gas molecule or surface atoms on dissociation phenomena was analyzed in detail. The Embedded Atom Method (EAM) was used to model the interaction between an H2 molecule and Pt(111) surface. Using this potential, simulations of an H2 molecule impinging on a Pt(111) surface were performed and the characteristics of the collision were observed. Using MD data the dynamic dissociation probability were obtained and compared with the static dissociation probability to analyze the effect of atomic motion on dissociation phenomena.
The Fatigue Life Prediction Problem for Fixed Plate of Helicopter
Authors: Zhan Zhi Xin , Hu Wei Ping , Zhang Miao , Meng Qing Chun
Published: February 2012

This paper analyses the fatigue life prediction problem for fixed plate of helicopter in the case of cyclic loading using damage mechanics methods. The material parameters are obtained by the results of the fatigue test of standard specimens. According to the theory of damage mechanics, the closed solution of fixed plate’s fatigue life is obtained. And the numerical solution is gotten through using finite element software ANSYS. Numerical solution, closed solutions and experimental results are consistent. This research provides a feasible way to predict the fatigue lives of structure members by means of damage mechanics.
Cover System Damper Reduce Load and Optimization Analysis
Authors: Yang Xing Lin , Chen Bo , Cheng Dong
Published: February 2012

The bolts of cover system are ruptures when cover system effected by transient load. According to the experiment data and research result to find, the frequency of loads is similar to cover system, and result in resonance. In order to eliminating resonance, change the original cover system frequency by adding damper. This paper adopts additional water mass method for wet modal; conclude inherent frequency and mode of vibration. Using FEM simulation on the two cases, to assess the effect of reduce load.
The Hygrothermal Aging Life Models of Solid Propellant
Authors: Lai Jian Wei , Chang Xin Long , Tao Sun , Fang Peng Ya , Liu Wan Lei
Published: February 2012

The temperature and humidity are two main environmental factors, which have influence on the life of solid propellant. Comparing with single factor aging life model, hygrothermal aging life model is more feasible, which takes temperature and humidity into consideration. In this paper two hygrothermal aging life models were established. The data of hygrothermal aging test of solid propellant was used for multiregression. According to significance analysis and comparison of two models, it was shown that two models both fit the test data well. Storage life of the solid propellant under normal condition was obtained by using the life models. The results of the research can provide reference for storage life prediction of solid propellant.
Numerical Simulation of the Two-Phase Turbulent Combustion Flow in the Multicomponent Propellant Rocket Engine
Authors: Liu De Song , Qiang Hong Fu , Xia Xue Li , Wang Guang
Published: February 2012

The numerical simulation, based on computational fluid dynamics methodology, has been performed to study the two-phase turbulent combustion flow in rocket engine using non-metallized multicomponent propellant. A reduced reaction mechanism is developed for modelling combustion of fuel droplets in the absence of metal. Gas governing equations are two dimensional axisymmetric N-S equations in Eulerian coordinates. The trajectory model is adopted to analyse the droplet-phase including the droplet collision, breakup and evaporation. The gas flow is influenced by the droplets by adding source term to N-S equations. The reliability of the simulation programme is validated by comparing numerical simulation result with engine test data.
Experimental Study on the Adsorption of Heavy Metal Ions with Oceanic Polymetallic Nodules and Cobalt-Rich Crust Leaching Residues
Authors: Pang Ning , Bai Zhi Min
Published: February 2012

The objective of the current study is the application of oceanic polymetallic nodules and cobalt-rich curst leaching residues. The phase composition, specific surface area and pore structure are measured. The experimental results show that the leaching residues with huge nano mineral particles have significant potential in environmental protection because of their large specific surface area and surface activity. The nano properties can be used for the disposal of heavy metal effluent with Cu2+, Pb2+ and Cd2+. And the influence of adsorption time, pH value and initial solution concentration on the adsorption effect are investigated. The maximum volume and adsorptive capacity of oceanic polymetallic nodules and cobalt-rich curst leaching residues to treat heavy metal waste water can be determined via the adsorption experiments.
Research on the Stress and Strain of Section Steel Reinforced Concrete Beam in Chang Jiang Crossing Campaign Memorial
Authors: Ding Ke Wei , Xia Yao
Published: February 2012

Analysis on monitoring data during construction of Chang Jiang Crossing Campaign memorial, the nonlinear method is used to get the fitting curve of stress-strain relation during construction, and the concrete constitutive relation of this project is acquired.
Low-Cost Heat Insulating Film Design for BIPV Modules Based on Multi-Layer Inorganic Materials
Authors: Tian Han Min , Guo Li Jia , Duan Wen Feng , Yang Rui Xia , Tian Feng Lan
Published: February 2012

By analyzing the transmitionce and heat rate of insulating antireflection films conposed by refractive-index adjustable SiO2 layer and TiO2 layers, the optimum combination of antireflection films of BIPV is obtained. The absorption rate at the ultraviolet part that wavelenght excessive inadequate 400nm of the optimized fils is 99.9%, which are directly designed on the surface of the low iron tempered glass panel of BIPV, and in the wavelength range 400nm-800nm, the visible light transmitionce rate is up to 99.5%, and the heat that wavelenght excessive 800nm is reflected of 20%. For the multilayer heat insulation films are composed with the same kind of material while with different refractive indexes, there is no projecting stress between these films and no constraints during the production process of different films for the possible low cost heat insulating of BIPV.
Effect of Different Welding Parameters on the Microstructure of 21% Cr Ferritic Stainless Steel
Authors: Han Rui Feng , Hu Sheng Sun , Shen Jun Qi , Han Jian , Xu Hai Gang
Published: February 2012

Ferritic stainless steel is an economical stainless steel which doesn’t contain nickel or a little nickel. It has the broad prospects of application. By using 21% Cr ferritic stainless steel as test material, the paper analyses the microstructure of the joint. The different welding parameters have the different effect on the depth, the solidification form and the microstructure.
Robustness Optimization Based on PERT in the Civil Aircraft Supply Network
Authors: Liu Li Lan , Luan Shao Qun , Wang Chen , Yu Tao
Published: February 2012

The civil aircraft’s manufacturing process is complicated because of its complex structure and various parts in need. The stability and high efficiency of the based supply network decides the coordination ability among departments and the development cycle completion date. Now it’s very urgent to study the robustness of the collaborative supply network. This paper optimized and designed the robustness of the civil aircraft supply network, first with the project evaluation and review technique (PERT) we set a supply network model; then optimized the critical path to make the system functions remain constant, and the civil aircraft supply network robustness got optimized
Research on the Temperature Distribution near the Surface of Long-Shaft Heavy Forging
Authors: Xia Qin Xiang , Cao Bao Hua , Li Zhe Lin , Zong Wei Qi , Xie He Qing
Published: February 2012

The precise edges of forging should be extracted from the image when measuring the dimensions of high temperature forging based on the non-contact image measurement technique. It is difficult to distinguish the forging boundary precisely due to the continuous variation of the air temperature near the forging. The two-dimensional simplified cross-section models, including the squaring, chamfering and rounding models, were established by the symmetrical modeling method. The air-cooling process from 1200°C to 800°C of high temperature long-shaft heavy forging was simulated based on ANSYS software. The variation regularities of temperature with the distance and time were obtained, which provides a theoretical basis to determine the edges of high temperature objects in non-contact measurement.
Frequency-Aimed Structural Optimal Design of Stiffened Plate
Authors: Mi Da Hai , Yang Rui , Zhou Liang , Liu Yang , Guo Dong Ming
Published: February 2012

Optimal structural design of stiffened plate structure with multi order modal frequencies objective is discussed. It is a structural reverse design problem for the first several order modal frequencies to reach a set of given value. A new method based on bi-directional evolutionary structural optimization (BESO) and size optimization is presented. To solve the porous and irregular shape problem in the optimized structure, a regular shaped grid-like frame structure optimization model is established. The bars in the frame structure are regarded as basic unites of structure modification. The bars’ sensitivity is discussed, and applied to optimization process based on frequency sensitivity. The structural optimal design process can be described as follows: the frequencies are used as the target, the volume is considered as constraint, adjacent sensitivity redistribution method is adopted to suppress numerical instability. Then size optimization method is adopted to conduct detailed design. Finally this method is applied to a stiffened plate structure. Results show that the proposed approach is feasible to achieve given multi order modal frequencies. The optimized structure consists of regular bars, so a clear structure is obtained.
Research on an Algorithm and System for Estimation of Instantaneous Frequency of Rotating Machinery
Authors: Yao Rong Qing
Published: February 2012

Instantaneous frequency is an import parameter to diagnose faults of rotating machinery. This paper puts forward an algorithm based Hilbert-Huang Transformation (HHT) to estimate the instantaneous frequency of rotating machinery and develops an instantaneous cymometer based embedded system technology. In order to estimate instantaneous frequency of rotating machinery, the vibration signal is decomposed into a series of intrinsic mode functions (IMF) first by the method of empirical mode decomposition (EMD), then one of the intrinsic mode functions is analyzed with the Hilbert transformation to acquire an estimate value of instantaneous frequency. An instantaneous cymometer is also described in this paper, which is designed to measure the average frequency and instantaneous frequency of rotating machinery in real time. The average frequency is acquired from measuring the cycle of key-phase signal, and the instantaneous frequency is from the above-mentioned method based HHT. The instantaneous cymometer is consisted of an embedded system, which is connected to a PC with an Ethernet. The embedded system is based on an ARM chip (Samsung S3C4510) A/D conversion, EMD and Hilbert transform are completed on the embedded system, and then the results are compressed and sent to the PC by TCP/IP.
Surface Modification of Silicon Carbide Powder by Nano-TiO2 and its Application in Wear-Resistant Coatings
Authors: Yan Jun , Li Hong Guang , Cui Hai Ping , Wang Ming Qiu , Du Shi Guo
Published: February 2012

By using butyl titanate as the main material, the nano-TiO2/μm-SiC composite particles were prepared in acidic abundant aqueous solution at low temperature. The properties of the composite particles, including surface morphology, the phase composition of the coating layer, were characterized by SEM, XRD and XPS. The results show that the surfaces of composite particles were rougher after nano-TiO2 coating. Compared with uncoated powders as filler, the weight loss of composite coatings decreased by 43%, when the composite particles were filled in wear-resistant coatings based on the silicone modified epoxy resins.
A Study on the Influencing Factors of Deformation Control of Deformable Warheads
Authors: Yang Ya Dong , Li Xiang Dong , Zhang Yuan , Qin Shi Yong
Published: February 2012

The deformation processes of a deformable warhead was numerically simulated using LS-DYNA three-dimensional finite element code to determine the influence factors of deformation control on the deformation quality. The relationships among optimal deformation time interval, deformation chord length, and deformation control parameters were established. The result shows that the phase angle of deforming charge should be taken within the range of 60–90°. a larger deforming charge phase angle is favorable when it comes to increasing the fragment density in the target direction. Meanwhile, the thickness of deforming charge is less important than the phase angle in terms of the influence of the deformation chord-length.
The Delay-Time Maintenance Optimization Model with Two Failure Modes
Authors: Zhu Lei , Zuo Hong Fu
Published: February 2012

The concept of delay time and its maintenance theory are introduced, considering failure modes of system have different probability of occurrence and repair time, two revised model are established with the defects follow homogeneous processes and non-homogeneous process, The revised model could improve the expected unit downtime and optimize inspection interval.
Ultrasonic Induced Preparation of the Inclusion Complex of Perilla frutescens Essential Oil with β-Cyclodextrin
Authors: Liu Hong , Jin Xue Yuan
Published: February 2012

In order to get Perilla frutescens (L.) seed oil (PSO) inclusion compound with β-cyclodextrin (β-CD). The ultrasonic induced preparation parameters was studied. Basis on the signal factor test, an orthogonal experiment L9(3)4 was applied to optimize the best preparation conditions. The optimum preparation parameters were determined as follows: ultrasonic power200W, ultrasonic time20min, inclusion temperature 48°C and ratio of PSO to β-CD 1:5 (ml/g). Under optimized conditions, the inclusion ratio was 81.1%. All the results indicated that ultrasonic induced preparation of PSO inclusion compound with β-CD was a suitable method for it has shorter time and higher inclusion ratio.
Alumina Ceramics via Gelcasting Forming with Low-Toxicity System
Authors: Wang Yue Min , Liu Jun , Wang Chao , Fei Ling Juan , Han Ya Wei , Wang Jian Jun
Published: February 2012

The gelcasting technique was used to fabricate 95 alumina ceramics green bodies. The gel system based on MAM-MBAM was low-toxicity in this study. The green bodies and the sinter obtained with solid content of 55vol% had high strength, density and quality. The influences of the monomers mole ratio (MAM/MBAM) and the monomers content (MAM and MBAM) on the compressive strength of green bodies, the solid content on the density, compressive strength and the shrinkage rate of green bodies were also discussed. The experimental results showed that the best mole ratio of MAM/MBAM was 12/1. Compressive strength increased with the increase of monomers content (MAM and MBAM). The microstructure of the green bodies indicated that the ceramic powders were connected by polymeric networks, and the ceramic powders in the green body distributed homogeneously and compactly.
Modal Analysis of Electronic Power Steering Based on Finite Element Method
Authors: Gao Xiang , Wang Yin Xiao
Published: February 2012

With the application of the software Pro / Engineer, the 3-D model of automobile Electric Power steering system is built. The pre-processing and post-processing of the model are carried in I-DEAS software, while PERMAS solver is used to calculate. The structure design and dynamic characteristic optimization of the model are researched, and on the basis of natural frequencies analysis, several design improvement schemes are brought forward. The optimum scheme is generated through comparison.
RWMS: RFID Based Weapon Management System
Authors: Sun Zhi Dong , Sun Jian Dong
Published: February 2012

Radio Frequency Identification (RFID) is a new generation of Auto Identification and Data collection technology which helps to automate management processes and allows identification of large number of tagged objects like weapons, using radio waves. In this paper, we propose a novel RFID based management system: RFID based Weapons Management System (RWMS) since weapons management plays an important role in the military control. Since its reliability and flexibility, RFID technique has shown big advantages than the conventional management systems. Time saving, fast accessing of weapons, eliminating manual errors and high accuracy are the main benefits of the RFID based Weapons Management. RFID based Weapons Management system would allow fast transaction flow for the army and will prove immediate and long term benefits to army in traceability and security.
The Development and Research of the Automatic Generation of Expert System of Garment Cad Pattern
Authors: Yang Li Na , Li Pu Hong
Published: February 2012

The development and research of the automatic generation of expert system of Garment Cad Pattern will change the traditional garment pattern design concept and design tools to enable advanced CAD technology and expertise in China's garment industry work together, which will greatly improve the level of the software sustainable development and intellectualization. It will be proved through constant practice to help improve the professional level of the garment pattern CAD software, create new ways of professional popularization and application which are suitable for China's national conditions.
H∞ Robust Control for the Motion of Loader Working Device
Authors: Wang Wan Qiang , Chen Hui Peng , Chen Guo Jin
Published: February 2012

This paper has set up the electro-hydraulic servo mathematical model for loader working device and devises a device motion controller with H∞ mixed sensitivity algorithm in order to improve loader’s automaticity and maneuvering performance. This paper has done some simulation research of the servo motion controller with Matlab/Simulink. And research has shown that the H∞ robust controller may improve working device’s automaticity and maneuvering performance enormously, the device motion controller has well robust stability and performance.
Levels of Difficulty for Sustainable Roadway Design
Authors: Tsai Calista Y. , Chang Andrew S.
Published: February 2012

Infrastructure projects have been requested to consider sustainability in recent years. However, many engineers have little idea how to start with this new issue. It would help engineers to incorporate sustainability if the difficulties and their reasons can be identified. This research investigated the levels of difficulty for sustainable design, by taking roadways as an example. It first collected 14 roadway design work disciplines such as drainage from a large engineering consulting company. Then it reviewed literature and practice to identify 60 sustainable items, and categorized them into 14 disciplines to establish a checklist. Finally, the checklist was used to interview designers to indicate the levels of difficulty of adopting these sustainable items. The difficulties to achieve sustainability into design are classified into three levels compared with traditional work: equal, medium and high. Twenty eight of the 60 sustainable items were evaluated at the same level of difficulty as traditional design. Approximately half of the items would not increase the difficulty when incorporated into design. The average difficulty would be between equal and medium level. Compared with traditional design work, incorporating sustainability into roadway design would increase certain difficulty.
The Mechanical Model of the Self-Guided Single-Blade Deep-Hole Reamer
Authors: Huang Xiao Bin , Shen Xing Quan
Published: February 2012

The structure and force of the reamers were analysed, and the mechanical model of the self-guided Single-blade deep-hole reamer was established. The fundamental basis of the structural design was expounded in theory. And analysed the Rationality which Single-blade tool and two Guide block were used. And the reamer stable cutting conditions were obtained.
Optimal Liquidation Strategy Based on Stochastic and Nonlinear Price Impact and Particle Swarm Optimization
Authors: Huang Fei , Cao Jia He
Published: February 2012

The institutional investor selling a large block of shares in the market usually faces with liquidity risk declining the stock’s prices. In the paper, supposing that temporary impact is stochastic and nonlinear function of trading velocity, we establishes the discrete mathematical model and uses PSO to obtain the optimal liquidation strategies of risk aversion, which is a strict concave function. When analyzing the sensitivity of the parameters, we find that the curve becomes higher and steeper with the increase of the parameters or the decrease of , .As the parameter is tremendous, the curve is close to a horizon line.
Combination Evaluation of Industry Independent Innovation Ability Based on Adaptive Genetic Algorithm
Authors: Hong Yan , Zhuang Ya Ping , Sun Bing
Published: February 2012

In order to measure industry independent innovation ability more scientifically, a combination evaluation model was established based on adaptive genetic algorithm. The basic steps and application principal of how to establish the model was explained in detail, and concrete operation process of the model was introduced briefly by an example. The empirical study shows that using this model to evaluate can get an accurate and object result, which is valuable for government and enterprises.