bluuebunny/crossref_metadata_2025 huggingface dataset:
Research of Tobacco Sorting System and Equipment Based on the Internet of Things
Authors: Yang Qin , Sun Chuan , Zhao Guan Hao , Yan Ai Zheng , Luo Sheng Zhao
Published: February 2012

According to the status of the china tobacco sorting system and equipment, this article provides an overall development trending of technology in sorting system and equipment based on the internet of things. Based on the research of key technologies in the high-speed automated sorting system and also the research of architecture mode, it can provide a reference for the overall system’s structure, capability, overall planning and the like through the network topology.
Effect of Rare Earth Metals on Inclusions and Impact Property of 2205 Duplex Stainless Steel
Authors: Liu Xiao , Wang Long Mei
Published: February 2012

The effect of rare earth metals on inclusions and impact toughness of 2205 duplex stainless steel were studied by SEM and electron spectroscopy. Thermodynamic calculation was used to analyze the formation of RE inclusions in 2205 duplex stainless steel. The result shows that aluminosilicate compound inclusion and sulfide inclusion can be entirely replaced by RE2O2S and RES. Fracture is changed from cleavage to ductile fracture by adding RE to the 2205 duplex stainless steel, and the spherical rare earth oxysulfide inclusions-RE2O2S in the dimple are the main factors. The transverse impact value of 2205 duplex stainless stainless steel has been improved obviously by RE. The transverse impact value of RE-2205 is increased 20.49% at the temperature of -40°C, comparing with 0RE-2205.
Effect Mechanism of Elliptic Vibration Assistance on the Cutting of Brittle Materials
Authors: Peng Yun Feng , Jiang Tao , Guo Yin Biao , Wang Zhen Zhong , Wu Yong Bo
Published: February 2012

A theoretical analysis for the effect mechanism of elliptic vibration assistance on the cutting of brittle materials is presented in this paper. The crack propagation in the chip formation zone in cutting of brittle materials is examined based on an analysis of the geometry and forces in the cutting region. The cutting model shows that the actual undeformed chip thickness is much decreased with elliptic vibration assistance, and the instantaneous rake angle of the cutting tool edge is also in a larger negative value than those in conventional cutting. These two conditions can ensure the compressive stress is much larger than the shear stress during the cutting process. Then the stress intensify factor is suppressed effectively and the shielding effect on the growth of pre-existing flaws is strengthened in the chip formation zone. The removal of brittle material tends to be in ductile mode without fracture. The characteristic examination of cutting force shows that the ratio of thrust force to cutting force with elliptic vibration is increased compared to that of conventional cutting. This can validate that the larger compressive stress can be generated in the chip formation zone with elliptic vibration assistance. The transition depth to brittle machining of silicon carbide with/without elliptic vibration assistance further supports the presented theory.
Industrial Process Modeling Based on Online Learning Algorithm for Regression Least Squares Support Vector Machine
Authors: Xu Yong , Wang Jian
Published: February 2012

According to the necessity for researching the optimization of enterprise energy-consuming based on model, the identification method for energy-consuming link in enterprise production process was researched. In view of the existing problems of Least Squares Support Vector Machine (LS-SVM), a modeling method based on Liu-transformation and LS-SVM was proposed. Liu-transformation was applied to intelligent data analysis for extracting typical characteristics from the training samples, and then the data were trained to construct the energy-consuming model based on on-line LS-SVM algorithm. The simulation result showed that the presented modeling method has the advantages of shorter computing time, robust and better generalization ability.
An R&D Project Dealing with Mechanical Bits and Pieces in Real Option Analysis
Authors: Luo Hua , Zhu Ming Zi
Published: February 2012

The goal of this paper is to study the R&D project under incomplete information. We extend the multi-step quadrinomial option pricing model through a practical case, which is the R&D project of the machinery to deal with mechanical bits and pieces. We pricing the real options valuation (ROV) of the project and show a decision tree, which can provide managers flexible decisions to analyze technology and market uncertainty.
Fatigue Life Prediction of Composite Laminate
Authors: Liu Jun , Zhang Feng Peng
Published: February 2012

Abstract. based on the accumulating fatigue damage model, with single ply plate theory and experiment data as the foundation, consider the interaction between adjacent layer and material degradation, a kind of fatigue life prediction method of fiber reinforced composite laminates is developed. The stiffness decline of each ply during cyclic loading is determined by the fatigue damage variable and the load amplitude and the fatigue life of any laminates can be predicted using the fatigue properties of single ply plate. Using this method a 3D Finite element model is established by ABAQUS software and the fatigue life and the fatigue damage evolution of a T300 / QY8911 laminats are analyzed, the results are more closer to the experimental results.
Nonlinear Vibration Characteristics Analysis of CNC Machine Tool Feed System
Authors: Feng Rui Cheng , Rui Zhi Yuan , Wu Qin , Li Hai Yan
Published: February 2012

Considering the nonlinear characteristic of ball screw, a Duffing equation with damping is used to model the nonlinear dynamics of feed system by employing the elastic displacement method. Then by using the tools of phase trajectory map, Poincare section and bifurcation diagram respectively, structure of the proposed model is identified, meanwhile, the properties of bifurcation and chaos are judged. Numerical results show that as the feed system works, the screw nonlinear vibrates. Therefore, the dynamics response of the system cannot be described by a linear dynamics model. In other words, a nonlinear dynamics model must be employed to analyze the dynamic properties of the system. The proposed model has an advantage over the model characterized by a linear dynamics with multiple degrees since the latter is only applied to the system with high stiffness. In addition, the dynamics properties of the feed system are revealed as the stiffness is low or the support at both ends in varied. A test in a NC machine tool verified the validity of the analytic results.
Friction Behavior under Different Forming Speed for Sheet Metal Forming
Authors: Fu Xiu Juan , Li Jian Jun , Liu Qian
Published: February 2012

In sheet metal forming, the friction between tooling and workpiece is an important factor which affects not only the quality of products but also the service life of tooling. In order to consider the effects of friction accurately for the optimization of stamping process and simulation, the friction behavior under different forming speed was investigated via tensile strip experiments. A 10000N servo-press which forming speed is ranged from 0.1mm/s to 200mm/s was used to collect the experiment data. Based on these data, the law of friction between tooling and workpiece was derived, it will be very useful to help set up the displacement-force and forming speed curve for the optimization of stamping process when a servo-press is employed.
A Research of Vibration Signal Processing of Air Suspension System
Authors: Yang Bin , Wang Jing Wen
Published: February 2012

Wavelet transform was utilized in vibrant signal processing of air suspension system. A dynamic model of 1/4 engineering vehicle with air suspension system was established. Road surface signal of B grade was input to the dynamic model. Vibrant acceleration curve of under spring mass and dynamic load curve of air suspension was gained. Noise signal of under spring mass acceleration and dynamic load of air suspension system were filtrated by wavelet decomposition. Vibrant acceleration signal of under spring mass and dynamic load signal of air suspension were extracted by wavelet reconstruction. It can provide a theoretical foundation for identifying dynamic load of air suspension system.
Analysis on the Twinning of FCC Metals by EBSD
Authors: Song Guang Sheng , Zhang Shi Hong , Cheng Ming , Wang Bin
Published: February 2012

For the technology of EBSD, the twinning of metals was described in the form of rotation angle combined with rotation axis, while the twinning of metals was usually described in the form of twinning plane combined with twinning direction. In this report, the corresponding relationship between the two description forms of twinning of face-centered cubic (FCC) metals has been built, based on this relationship, the twinning plane and twinning direction of FCC metals can be determined by EBSD. As the practical application of this relationship above, the twinning variants of two kinds of Ni based superalloys were analyzed.
Effect of Warm Deforming and Heat Treating on Microstructure and Mechanical Properties of Mg-Zn-Zr Magnesium Alloy
Authors: Lu Guan , Yang Ya Qin , Li Bao Cheng , Zhang Zhi Min
Published: February 2012

In this paper, the effects of hot extrusion and T5、T6 heat treatment on the microstructures and mechanical properties of ZK60 magnesium alloys are investigated by optical microscope, electronic scanning microscope and mechanical testers. The result shows that both the tensile strength and the elongation of the ZK60 alloy extruded at 380°Care much higher than that of the as-cast alloys, as there are much granular second phases precipitated during the extrusion. The tensile strength of the extruded and T5 treated alloy increases while the elongation decreases faster than that of the extruded alloy. The strengthening effect of the T6 treatment is inferior to that of the T5 treatment. The tensile fracture of the as-cast alloy is brittle fractured while that of the extruded and T5 treated alloy is ductile fractured with lots of deep and even dimples.
Preparing Large Sized Billet of High Strength Aluminum Alloy with the Application of Low Frequency Electromagnetic Field
Authors: Zuo Yu Bo , Zhao Zhi Hao , Zhu Qing Feng , Wang Xiang Jie , Cui Jian Zhong
Published: February 2012

Grain refinement is quite important for producing 7050 alloy billet especially in large scale. Low frequency electromagnetic casting (LFEC) process was used to make 7050 aluminum alloy Φ500 mm billets and study the effect of electromagnetic field on the microstructure. The sound Φ500 mm billets of 7050 alloys without any grain refiner can be successfully prepared by the LFEC process. The results show that low frequency electromagnetic field has a significant grain refining effect on 7050 alloy and can effectively eliminate feather grain structure. The microstructures of LFEC ingot from the border to the center of the cross section are all equiaxed grains and are finer and more uniform than that of conventional direct chill (DC) cast billets. The LFEC process also shows a strong power to eliminate hot tearing during casting large sized billet of high strength aluminium alloy.
Nonlinear Analysis of I-Shaped Short Pier Shear Wall with Concealed Bracings
Authors: Li Ya E , Tang Yu Hong , Li Zhi Hua , Hao Zhi Hai
Published: February 2012

In this paper, research on I-shaped short pier shear wall model which is the relatively weak seismic system components is presented. According to the results of Finite element software ABAQUS simulation, the influence of the bearing capacity, ductility and skeleton curve behavior on the I-shaped short pier shear wall with concealed bracings is mainly studied under different axial compression ratio and different reinforcement proportion of the concealed bracings. The results indicate that the I-shaped short pier shear wall with concealed bracings has a higher carrying capacity, and the ductility has also been enhanced. And the factor that axial compression ratio, reinforcement proportion of the concealed bracings significantly affect the seismic behavior of the I-shaped short pier shear wall with concealed bracings
Vibration Characteristics Analysis of a High-Speed Horizontal Machining Center
Authors: Nan Jing Yang , Wang Min , Zan Tao , Zhang Jin Xin
Published: February 2012

By the experimental modal testing to the main structure of the high-speed horizontal machining center，the modal parameters such as the natural frequency, damping ratio, stiffness and mode shapes are obtained. By analyzing the vibration characteristics, the critical components of the machining center is at the spindle front bearing part and the vertical column on which the screw driving spindle box to move in vertical direction is mounted are determined, and provide an important basis of optimizing the structure for the machining center. And the amplitude-frequency characteristic curves of the critical components evaluate the dynamic stiffness as the key indicators to provide reliable data for improving processing accuracy and cutting ability of machining center.
The Study on Spectral Imaging Technique in Detection of Dermatosis
Authors: Chen Yan Ping , Dai Jiao , Kong Ling Hua , Li Chun Bin
Published: February 2012

Dermatosis, a kind of common and frequent disease, is harmful to health and risk against the lives of human beings. The detection of dermatosis is of great significance, especially to the early diagnosis of skin disease. Nowadays, the studies of spectral imaging technology in the diagnosis of skin disease are attracting more and more attentions. In this paper, we firstly review some literary products related to dermatosis detection and then make a comparison among fluorescence spectrum method, filter wheel method, liquid crystal tunable filter (LCTF) method and mosaic multispectral imaging technology. Finally we propose that the smaller, lighter and more cost-effective equipment should be the trend.
Research on Process Parameter Effects on Surface Roughness and Subsurface Damage in CMP of Single Crystalline Silicon
Authors: Chen Mei Yun , Yang Wei , Guo Yin Biao , Xie Yin Hui , Guo Long
Published: February 2012

Reported in this paper is an investigation of the process parameter effects on surface roughness and subsurface damage (SSD) in CMP of single crystalline Silicon. For the given experiments, the appropriate method to examine the SSD can be obtained. The surface roughness and figure accuracy were measured with an atomic force microscope (AFM) and Taylor-Hobson profilometer. The experiments results indicate proper process parameter for the best surface roughness, which can be divided into two stages. It should use longer time in the finish polishing stage, while shorter time and reduce the ratio of polishing pads and head in the ultra-finish polishing stage. Generally speaking, the isotropic etching of single crystalline Silicon, anisotropic etching of single crystalline Silicon and hand burnishing are mostly used to find the SSD and it is found that the last method is the best one to see the SSD by SEM.
Effect of Cutting Oil on Grinding Cemented Carbide
Authors: Yang Xiao Fan , Li Chao , Zeng Teng Hui , Li Ling Xiang , Xu Zhi Long , Liu Lian Fen
Published: February 2012

Based on the experiment of grinding cemented carbides end mill blade flute with diamond wheels, the effect of the viscosity of total-synthesis cutting oil on grinding process is studied under different feeding speeds and different cut depths. The results of the experiment have shown that grinding with the total-synthesis cutting oil of low viscosity can reduce the grinding force, improve the surface quality of workpiece, and reduce the wear of grinding wheels under the same grinding conditions. As the feeding speed and cut depth increase, maximum undeformed chip thickness of grinding is increased and grinding force gets higher, that leads to the worse surface quality of workpiece and the increased wear of grinding wheels.
Drilling of Glass Fibre Reinforced Plastic
Authors: János Líska , János Kodácsy
Published: February 2012

Nowadays composite materials are used in many industrial areas. The main application of these is the aircraft industry. Problematic points with machining of composite materials are tool wear, tool life, delamination and temperature during machining of polymer composite materials. Paper focuses on investigation of delamination at drilling of glass fibre reinforced composites. Experiments were planned on the base so called design of experiment - DOE. We observed the evolution of delamination at investigations, when we combined 4 different variables (vc, fz, tool, cooling system). We investigated the evolution of force relations, torques, dimensional and shape accuracy, considering on delamination. We processed results statistically, for processing we used software MINITAB and MATLAB. We summarized results in tables and graphs.
Research on the Die Fittingness and Springback of Large Diameter Thin-Walled CT20 Titanium Alloy Tube NC Bending
Authors: Wang Jian Guang , Zhan Mei , Huang Tao , Yang He
Published: February 2012

The signiﬁcant die unfittingness and springback, occuring during the numerically controlled (NC) bending process of large diameter thin-walled CT20 titanium alloy tube, has an obvious influence on the shape and the geometrical precision of the bent tube, furthermore on the assembly precision and the sealing capability. The changing rules of die fittingness and springback of large diameter thin-walled CT20 titanium alloy tube under different bending parameters were investigated and the mechanism was analysed using finite element method (FEM) in this paper. The result shows that the springback of large diameter thin-walled CT20 titanium alloy tube is more significant than that of aluminum alloy and stainless steel tubes with the same specification. The die fittingness has a connection with the tangent compressive stress on the intrados of the tube before springback, the larger the tangent compressive stress, the worse is the die fittingness.The results may provide a significant guide to the control of bending radius and bending angle for large diameter thin-walled titanium alloy tube NC bending.
Fault Detection in a Cracked Pipeline Embedded with Piezoelectric Sensors/Actuators Employing Bond Graph Approach
Authors: Kolbadi Nejad M. , Selk Ghafari A. , Zabihollah A.
Published: February 2012

The main scope of this article is to simulate a cracked pipeline embedded with piezoelectric sensors and actuators utilizing bond graph approach. Piezoelectric sensors/actuators are becoming very popular in various applications such as health monitoring, active vibration control or noise reduction, and as a part of the systems called smart structures. The proposed bond graph structure in this study, graphically illustrates the power flow between the electrical and mechanical frameworks included in the system. In addition, the proposed framework makes it possible to utilize a modular structure for separately representing the electrical polarization of the material and its macroscopic electrical and mechanical effects. Simulation results illustrate that at the location of the crack the equivalent impedance is increased and the capacitance is decreased in comparison with the intact region.
Novel Single Walled Carbon Nanotube Based Magnetic-Fluorescent Nanohybrids as Dual-Modal MRI/Optical Imaging Probes
Authors: Chen Bing Di , Zhou Tian , Zhang Bo , Yao Ai Hua
Published: February 2012

Gadolinium chelate and Quantum Dots (QDs) decorated single walled carbon nanotubes (SWNTs) nanohybrids (SWNT-Gd-QDs) were designed for dual-modal cellular imaging via magnetic resonance imaging (MRI) and optical imaging. The nanohybrids were prepared via a simple and novel layer-by-layer (LBL) assembly in combination with covalent connection strategy. The SWNT-Gd-QDs nanohybrids showed a strong near-infrared photoluminescence (PL) emission at room temperature and enhanced T1-weighted and T2-weighted MRI signals in water. Thus, the nanohybrids combine magnetic and fluorescent properties and can serve as dual-modal MRI/optical imaging contrast agent.
Study on Application of Super-Resolution Image Reconstruction Method Used in Video Image Processing
Authors: Qi Jing Jia , Guo Chuan Jun , Nan Yang
Published: February 2012

Super resolution image reconstruction is a computational process of using multiple low-resolution observations to reconstruct a higher resolution image, which differs from improvement of optical devices. With magnification diversity among those low-resolution imagers, significant performance improvement, compared to traditional methods, is demonstrated. Results include fidelity metrics and simulated reconstructions. Performance improvement of super-resolution imaging systems with magnification diversity is studied in this paper.
Fabrication of Highly Ordered Carbon Networks as Catalyst Supports for Aerobic Oxidation of Glucose
Authors: Wang Chao Xian , Sun Chang Yong , Yu Chang Jiang , Li Yong Xiu , Zhao Jian , Huang De Xuan , Song Yi Bing
Published: February 2012

Highly ordered macro- and meso- porous carbon materials were prepared in a facile nanocasting approach using colloidal crystals silica and SBA-15 as starting template, respectively. The synthesized macroporous carbon templated from colloidal silica shows a honeycomb-like morphology and three-dimensionally interconnected networks of macrospores of about 400 nm in diameter. The resulting mesoporous carbon derived from SBA-15 templates exhibits high specific area (1206m2/g), large pore volume (1.097cc/g) and uniform pore size distribution (3.64 nm). These carbon materials were employed to aerobic oxidation of glucose as support of Au NPs catalyst. 2wt% Au NPs/mesoporous carbon shows high catalytic activity due to highly dispersion of Au NPs resulting from the confinement effects of mesoporous carbon.
PWM Chopper of Ultrasonic Power Supply Based on FPGA
Authors: Sun Chun Feng , Zhang Wei Guang
Published: February 2012

Pulse width modulation (PWM) is often one of the important power regulation method of ultrasonic power supply. The traditional PWM control circuit has the shortcomings of complex design structure, slow dynamic response and low reliability. An advanced PWM technique for choppers of ultrasonic power supply based on FPGA is proposed. Through open-loop operation, it regulates the output pulse width of ultrasonic power supply dynamically. The simulation result shows that the PWM control circuit based on FPGA can realize to adjust the width of PWM signal and power regulation conveniently.
Polyaniline/Graphene Composite as Supercapacitor Electrode
Authors: Zheng Ming Sen , Wei Zhi Kai , Dong Quan Feng
Published: February 2012

Polyaniline/Graphene composite (PANIGNS) was synthesized via in situ polymerization method. XRD and SEM results indicated that the polyaniline could uniformly adsorb on the graphene surface and prevent the agglomeration of the graphene sheets. The composite exhibits excellent electrochemical performance. A specific capacitance of 688F/g at current density of 1A/g was achieved in 1M KOH solution. The capacitance retention of 77.3% was acquired after 1000cycles at current density of 10A/g.
Preparation of Carbon Nanoball from Starch by Arc Discharge
Authors: Wu Xiao Juan , Yuan Xia , Yu Lian Gan
Published: February 2012

This paper presents a novel strategy for synthesis of carbon nanomaterials using the Cstaple biomaterials – starch as the starting materials. The carbonhydrate were vaporized by arc under helium, which leads to a large amount of monodispersive carbon nanoballs with range of 30-70nm in diameter. In addition to carbon nanoballs, some carbon nanocapsules were occasionally observed in products. Transmission electron microscopy (TEM), energy dispersive X-ray (EDX) and X-ray diffraction (XRD) were employed to characterizing products. The growth mechanism of carbon nanoballs is discussed briefly in terms of the precursor composition and process parameters.
Nonlinear Analysis of Eccentric Compression of GFRP Tube Filled with SRHC Columns
Authors: Zhou Le , Wang Lian Guang , Niu Peng , Nie Hong Bin
Published: February 2012

The whole bearing compressive process under eccentric compression is analyzed for the further study of bearing compressive capacity of GFRP tube filled with SHC（steel-reinforced high-strength concrete）columns subjected to eccentric compression. Based on finite strip method from the plane cross-section assumption, the computation program of bearing eccentric compressive capacity of GFRP tube filled with SHC columns is formulated according to the existing retrofit theory and related technical procedures. The relation curves of load-deformation, as well as the effect curves of concrete strength, slenderness ratio, eccentricity and containing bone rate to load-deformation is obtained by means of this calculating program. Calculations show that the ultimate bearing compressive capacity of composite column decreases with the increase of slenderness ratio, elastic stage of component curve gradually shortens and stiffness gradually loses; The ultimate bearing compressive capacity of composite columns decreases with the increase of eccentricity; component ductility improves; the ultimate bearing compressive capacity of composite columns increases with the increase of concrete strength. The calculated results agree well with the experimental results and provides a basis for practical design
Study on Waterproof and Water-Resistant Properties of Gypsum
Authors: Pan Hong , Li Guo Zhong
Published: February 2012

The comprehensively modified effect of cement, VAE emulsion and self-made acrylic varnish on mechanical and water-resistant properties of gypsum sample was investigated and microstructure of gypsum sample was analyzed. Experimental results exhibit that absolutely dry flexural strength, absolutely dry compressive strength, water absorption and softening coefficient of gypsum specimen with admixture of 10% ordinary Portland cement and 6% VAE emulsion and acrylic varnish coated on its surface can respectively reach to 5.11MPa , 10.49 MPa, 8.32% and 0.63, respectively.
Study on the Thermal Performance of the Vernacular Dwellings in Wei-He Plain of Shaanxi Province
Authors: Zhu Yi Ping , Liao Xi , Wu Shu Yun , Luo Jing , Jiang Yuan , Wu Wen Bo
Published: February 2012

Based on indoor thermal environment test and questionnaire surveys, the paper studies on thermal insulation capacity and indoor thermal environment of the vernacular dwellings in Wei-he Plain of Shaanxi Province, China, and analyses their heating methods and application status. Besides, the popularity of sustainable techniques in local area has been evaluated and summarized. Moreover, the paper discusses the present problems in local indoor thermal environment and energy-saving status.
The Surface Characteristics of Exterior Wall External Insulation System with Foamed Glass in Weathering Resistance Test
Authors: Wu Xiao Yan , Luo Yi Ying
Published: February 2012

A weathering resistance test was made to exterior wall external insulation systems with foamed glass decorated with coating and facing brick in this paper. The results show that the change of ambient temperature has large effect on the external insulation systems. Because of the phenomenon of stress concentration, there are many cracks in the windows position. On the other hand, the system decorated with facing brick has much less cracks than the system with coating, and its surface layer has no hollowing. So from the perspective of weathering resistance, the exterior wall external insulation systems with foamed glass decorated with facing brick is better than the system decorated with coating.
Nanoparticulate Functional Materials: Green Synthesis and Application for the Degradation of Phenolic Compounds
Authors: Zhang Feng
Published: February 2012

Zinc oxide nanoparticles was synthesized by microwave decomposition of zinc acetate precursor. Horseradish peroxidase (HRP) was immobilized on nano-ZnO. The catalytic activity, physical, and chemical properties of immobilized HRP as well as the interaction between HRP and nano-ZnO was studied. The Nano-ZnO immobilized HRP showed a better property in the thermostability, active pH stability. The Nano-ZnO is more effective than free HRP in the removal of many phenolic compounds. The results show that nano-ZnO is strong functional materials for envrionment protection.
Design and Application of Steel Tube Confined Concrete
Authors: Wu Hui Ge , Chen Ji Hua , Gu Jie , Long Yu Zhang , Yin Zhao Xu , Wang Jia Rong
Published: February 2012

This paper described the application of steel tube confined concrete in the Service Guarantee Integration Building of Jingya restaurant group which is affiliated to Administration office of Arms Department of the General Staff of PLA. It was proposed that the concrete mix proportion should meet high-flowability, high-strength, high stability, high-density and low shrinkage. This research provides a practical basis for future study and application of high-throwing, self-compacting concrete confined by steel tube.
Mix Ratio Design and Performance Optimization of Vitrified Microsphere Insulating Mortar
Authors: Chen Jin Ping
Published: February 2012

Vitrified microsphere insulation mortar is a new type building insulation mortar which developed in recent years, with having the advantages of well workability, high intensity and fire prevention. But because the vitrified microsphere we use of which much exists on the defects of high dry density and bad insulation effect, it analyzed deeply kinds of factors which influence on the physical and mechanical properties of vitrified microsphere insulation mortar, making use of orthogonal experiment to optimize the composition materials of insulation mortar. The orthogonal test results show that the most influential raw materials factors to mortar insulation properties and 28d compressive strength followed by aggregate, polypropylene fiber, fly ash and latex powder.
Lateral Dynamics of Three-Axle Steering Vehicle Based Zero Vehicle Sideslip Angle Control
Authors: Li Yao Xu , Wang Yun Chao , Feng Pei Feng
Published: February 2012

Based on the established linear 2-DOF dynamics model of three-axle steering vehicle, the relationships between the gain of main transient and steady-state characteristic parameters of three-axle steering vehicle based on Zero Vehicle Sideslip Angle Control (ZVSC), vehicle speed and the deviation of the instantaneous steering center are deduced, and the influences of the control method and system inherent characteristics on steering transient response and stability are discussed. The main characteristic parameters of all wheels steering vehicles and front wheels steering vehicles are compared by quantative analysis using MATLAB with the consistency with theoretical analysis proofed.
Numerical Analysis of the Wet Deformation for Earth-Rock Dam during Water Storage
Authors: Li Yong Quan , Chen Jun Fu , Tu Yun Zhong , Zheng Xiao Lei
Published: February 2012

Finite element equations are introduced when the wet deformation is considered under Coupled Deformation and Seepage Fields. The principle of the initial stress increment method, by which the wet deformation can be calculated, is detailed dealt with. One earth-rock dam is stimulated by finite element method during water storage. By applying nonlinearity elastic model, give the discussions on the impact on stress field and displacement field by the wet deformation. The results show that the wet deformation weakens the uplift by buoyancy. Those results gained by numerical method may provide reference to engineering practice.
Inkjet Printing Technology for Dye-Sensitized Solar Cells
Authors: Lin Yu Li , Hsu Cheng Yi , Tai Chang Lun
Published: February 2012

The task of this study is to prepare the TiO2 film electrode for dye-sensitized solar cells (DSSC) on ITO PET substrate using a general jet-printer. The results were compared with that obtained using ITO glass substrate. In this study, the dispersion of TiO2 slurry was manipulated by changing the pH value of the solution to avoid agglomeration of TiO2 particles. The average TiO2 particles used in this study were measured about 130nm. The experimental results show that it has the best performance when the thickness of the TiO2 film was about 10μm. In ITO glass substrate, the measured short circuit current was about 5.03mA, the open circuit voltage was measured to be 0.65V. In ITO-PET substrate, the measured short circuit current was about 2.73mA, the open circuit voltage was measured to be 0.68V.
Characterization and Preparation of Well-Dispersed TiO2 Nanoparticles by Ultrasonic Microemulsion Method
Authors: Jiang Bing Ying , Feng Fa Mei , Li Ci , Wang Min , Xie Jia Qing
Published: February 2012

Well-dispersed TiO2 nanoparticles were successfully prepared ultrasonic microemulsion method in this paper. The morphology and microstructure of the products were characterized by the laser particle size analyzer, Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometer (XRD), differential scanning calorimeter (DSC) and transmission electron microscope (TEM). It was found that the TiO2 nanoparticles obtained from this method have well-proportioned size distributions; the surfactant (CTAB) molecule was adsorbed on the surface of TiO2 nanoparticles precursor, which is favorable for the dispersion of TiO2 nanoparticles; the TiO2 nanoparticles calcined was a crystal of the cubic structure. In addition, the mechanism on the formation of the TiO2 nanoparticles was also proposed in this paper.
Design and Implementation of Assembly Resources Management System Based on Knowledge
Authors: Wu Da Wei , Zheng En Ying , Du Bao Rui
Published: February 2012

The key technologies and implementations of aircraft assembly resource management system are being researched in our paper, and the definition and classification of assembly resources are proposed, and classification model library are being created, at the same time the knowledge database, data models and inference mechanism assembly resource knowledge database system are designed, at last resource management system assembly are developed with the database software.
Application of Fuzzy Statistical Analysis to Middle School Students’ Perceptions on School Climate
Authors: Huang Hui Min
Published: February 2012

School climate affects students’ learning and many aspects of their life. The main purpose of the study is using fuzzy statistical analysis to investigate the membership and the fuzzy expected values of middle school students’ perception on school climate. And using fuzzy χ2-test of homogeneity analyzed different perception between different genders on school climate. The scale had six items and it designed by the researcher. The participants were 67 middle school students. They were asked to answer it by using fuzzy number. The findings were as follows. 1. Most students agreed that their school climate was good. They thought that school was a safe place, the communicative tunnels between school and students were appropriated, the teachers of school won their trust, and they felt satisfied with the school environment. 2. There were significant differences between different genders perception on school climate, like teaching quality, the policies of school could keep on doing them, and being satisfied with the school environment. The result can make the school understand more about students’ perception on school climate, and try hard to improve or maintain it. And it also makes us know better about the advantages of fuzzy statistical analysis.
Physical and Mechanical Properties of Inorganic Particles Filled Individual Bamboo Fibers
Authors: Gao Jie , Wang Ge , Cheng Hai Tao , Shi Sheldon Q.
Published: February 2012

The objectives of the current study involve in situ depositing treatments of calcium carbonate particles onto bamboo fibers through the ionic reaction of sodium carbonate and calcium chloride aqueous solution at varied bath temperatures, and their impacts on surface features, wettability and tensile properties of single bamboo fibers. Field emission scanning electron microscopy was employed to characterize surface morphology of fibers. The wettability of bamboo fibers was evaluated by optical contact angle measurement instrument. The results show that nanoparticles and submicron particles grew into the wrinkles and micropores of fibers, the size, morphology and adsorbance of which were distinctively varied at different bath temperatures. The highest calcium carbonate adsorbance (2.34%) was obtained at 25°C. Besides, the mean values of contact angles increased and the variations within group were reduced as the loading percentage of particles rose, which might be due to reduced hydrophilic groups after coatings of calcium carbonate particles. The treatments were approved to enhance tensile properties of single bamboo fibers, comparing to the average tensile strengh and modulus of elasticity of the untreated, those of the treated bamboo fibers with the biggest calcium carbonate loading were higher by 30.50% and 32.71% respectively. It’s proved that the precipitating treatment is a useful method to densify and hydrophobize bamboo fibers and smooth out cell wall defects. What’s more, it provide explanations for improvements of physical and mechanical properties of paper and fiber reinforced plastic composites filled with inorganic nanoparticles.
Preparation of Borosilicate Xerogel and Research on its Mineralization
Authors: Wang Chen , Li Ya Dong , Ding Gu Qiao
Published: February 2012

Tributyl borate was first adopted for the introduction of boron in the preparation of bioactive borosilicate xerogel by sol-gel method. The xerogel reacted continuously in 0.25M K2HPO4 solution with a starting pH value of 7.0 at 37 °C for 1day. The structural, morphologies and compositional changes resulting from the conversion were characterized using X-ray diffraction, scanning electron microscopy and Fourier transform infrared spectroscopy. The results indicated that speed of formation of HA was cut way back on the time with the addition of boron and the induction period for the HA nucleation on the surface of the borosilicate xerogel was short than 1 days. The conversion mechanism of the borosilicate xerogels to hydroxyapaptite was also discussed.
Influences of Adding Aluminum on Inclusions in H13 Steel through P–ESR
Authors: Wang Fei , Chen Xi Chun , Guo Han Jie
Published: February 2012

Reducing oxide inclusions’ number and size by aluminum deoxidization is an effective way for improving working life of high strength steel. For this purpose, during inert gas protection electro–slag remelting (P–ESR) process and H13 steel as electrodes, the deoxidizer being made of aluminum grains, iron powder and calcium fluoride powder mixture was added into slag pool with different addition rates. Results of experiment indicated that, by P–ESR remelting, oxygen content reduced from 0.0045 to 0.0010 with different aluminum addition rates. Based on the SEM and EDS analysis, inclusions transformed from CaO–MnO–SiO2–Al2O3 particles in electrode to pure Al2O3 particles, and number and size of particles modified obviously. Finally, action mechanism of the deoxidizer during P–ESR process was discussed by analysis results and thermodynamic calculation.
In Situ FTIR Spectroscopy Study on the Crystallization Process of Isotactic Polypropylene in Isotactic Polypropylene/Polyethylene-Glycol Blends
Authors: Li Xiu Yun , Yang Li , Liu De Chun
Published: February 2012

The crystallization of isotactic polypropylene (iPP) and polypropylene/polyethylene-glycol （iPP/PEG） blends were investigated by in situ Fourier transform infrared spectroscopy (FTIR) and wide angle X-ray diffraction (WAXD). It was found that the existence of polyethylene-glycol（PEG） does not destroy the helical structure of iPP in the melt, but changes the crystal structure of iPP in the bends. Moreover, the variation tendency of ratios of intensity A998 cm-1/A1460 cm-1 for iPP and iPP/PEG blends showed that the the onset crystallization temperature of iPP is improved by addition of PEG until the PEG content reaches to 5 wt%, and beyond this content, the crystallization point decreases.
Study on Synthesis of Cationic Polymethyl Acrylate Emulsion
Authors: Ma Yong Sheng , Wang Lin Tong , Sun Xian Hui , Chen Yun Fa , Dou Zhi Fu , Lu Guan Qun
Published: February 2012

Emulsion copolymerization of methyl acrylate, styrene, acrylamide, acrylonitrile and homemade cationic monomer was studied. A series of clean cationic polymethyl acrylate emulsion were synthesized using no soap emulsion polymerization. Influence of polymerization conditions such as cationic monomer ratio, electrolyte addition amount, the dosage of initiator on synthetic latex performance and the strengthening effect to paper pulp was studied. It was showed by experimental results that sample No.3 which particle size and zeta potential was 0.142 μm and +29.2 mv respectively was the optimal sample latex. When the dosage of latex No.3 was 1.0% to absolute dry pulp, tensile index and ring crush index of paper was increased by 14.6% and 17.8% respectively.
A Method of Fault Detection and Diagnosis for Electromagnetic Direction Valve Based on Artificial Neural Network
Authors: Dai Min Qiang , Cai Wei , Zhao Sheng Dun
Published: February 2012

The magnetic field and vibration signal of electromagnetic direction valve can be detected real-timely by a non-intrusive on line detection device, which can use to monitor working state of the valve. A method of fault detection and diagnosis for electromagnetic direction valve from the signal detected by the non-intrusive on line detection device is presented in this paper. The wave frequency bands energy analysis method is adopted to distinguish the electromagnetic direction valve’s state, and the vibration signal are decomposed by three-layer wavelet packet which wavelet basis is db10. The fault identification method is based on BP artificial neural network (ANN), which is the most well-known three-layers BP ANN whose input and output layers have 8 and 3 neurons respectively.
Effect of Continuous Annealing Parameters on the Microstructure and Magnetic Property of Cold Rolled Dual Phase Steel
Authors: Gao Li , Song Qiu Hong , Yuan Jun Ting
Published: February 2012

The effect of continuous annealing parameters on the microstructure and magnetic property of cold rolled dual phase steel (DP steel) are investigated. Correlations of microstructure, magnetic properties and continuous annealing parameters are revealed. The mechanism of the magnetic property varying with continuous annealing process is also discussed. The results show that recrystallization is almost completed when heating to 740°C. For the DP steel soaked in the range of 770°C-830°C and quenched in different temperature, the TEM results indicate its microstructure mainly consists of the ferrite and martensite phase. The martensite volume fraction increases gradually with increasing the soaking and quenching temperature. It is found that magnetic properties of dual phase steel are very sensitive to continuous annealing process. With rising soaking and quenching temperature, the coercivity and hysteresis loss increase obviously, whereas the maximum permeability and the remanent induction tend to decrease.
Reliability Design for Allowable Stress of Creep Rupture Strength of 4Cr25Ni35 Steel
Authors: Pei Ji Bin , Zhao Yun Feng , Yu Shao Ping , Zhao Jie
Published: February 2012

Creep rupture data plays vital role in life prediction and safety assessment of high temperature components. In order to describe the scattering of the data, a statistical analysis of creep rupture data for 4Cr25Ni35 steel was performed by Z-parameter method. With the application of Z-parameter, reliability design for allowable stress of creep rupture strength was carried out according to design life. It is found that Manson-Haferd method appears better correlation results with experimental data. Statistical analysis shows that the scattering of Z-parameter for 4Cr25Ni35 steel is supported by normal distribution. Compared with safety factor method, the method based on Z-parameter can perform reliability design for allowable stress of creep rupture strength by considering the dispersibility of the rupture data. Reliability design based on Z-parameter is more agree with experimental data.
Optimization of Weir & Dam with Drain Holes in Continuous Casting Slab Tundish
Authors: Chen Chao , Cheng Guo Guang , Sun Hai Bo , Wang Xin Chao , Zhang Jia Quan
Published: February 2012

The optimization of the location and height of weir & dam with drain holes in a single-strand continuous casting tundish was carried out from the view of fluid flow characteristics by physical modeling using a 0.4 scaled water model and mathematical modeling study. Considering simultaneously reducing the remaining melt, maximizing the plug flow and avoiding the short circuited flow, the dam with two upwardly inclined drain holes was optimized. The parameters such as location and height of weir & dam Lw/L, Ld/L, Hw/H and Hd/H are important to fluid flow in tundish. Among them, the location and height of dam were more critical to the overall fluid flow in tundish. The gap between weir and dam was also very important, the gap length that smaller than 0.266 will be preferred. The dead region behind the weir was enlarged and the tracer flow through the drain holes of dam was weakened as increasing the gap of weir and dam. In present study, the parameters of the optimized Case7 are Hw/H 0.448 (162/362), Hd/H 0.718 (260/362), Lw/L 0.4 (480/1200) and Ld/L 0.667 (800/1200). For the fluid flow field, the near surface flow which beneficial to inclusions removal existed both above the dam and through the upwardly inclined drain holes. While the case of bottom grooved dam used may lead to short circuited flow through the grooves.
Study on Polycyclic Aromatic Hydrocarbons Distribution during Single Coal Coking
Authors: Shi Yan , Li Jun Guo , Gao Lin
Published: February 2012

Coking is the process of coal pyrolysis. It can produce a large number of PAHs which are the typical persistent organic pollutants with their teratogenic, carcinogenetic, and mutagenic. The writer studied the PAHs in single coal coking process through laboratory sampling and high-performance liquid chromatography analysis, observed and summarized the structure distribution of 16 kinds of priority recommended PAHs in three single coal coking process, and provided the foundation data for the control of PAHs.
Alumina (Al2O3) Nanofibers from Electrospinning
Authors: Lai Delin , Chen Yong , Yang Da Xiang , Guo Wei Ling , Yu Yu Xi
Published: February 2012

The alumina (Al2O3) nanofibers were fabricated by electrospinning a viscous mixture of aluminum isopropoxide solution in 10% aqueous solution of PVA followed by calcination at 500~1000 °C. Tools such as scanning electron microscopy (SEM), X-ray diffraction (XRD), and thermogravimetric and differential thermal analysis (TG-DTA) were employed to characterize the obtained nanofibers. When the nanofibers were heat treated at 1000 °C, the as-prepared nanofibers have a diameter in the range of 30 ~ 100 nm, and are composed of α-Al2O3.
Tool-Workpiece Temperature for Continuous and Interrupted Cutting of ASSAB 760 Steel with Dry Machining Process
Authors: Azuddin M.
Published: February 2012

Temperature generated on the tool-workpiece has significant effect on the cutting performance. This paper present the tool-workpiece temperature result recorded by thermal imaging camera with various cutting parameter applied. The machining was done on ASSAB 720 steel workpiece for continuous and interrupted cutting. Generally, as the cutting speed, feed rate and depth of cut increases, the tool-workpiece temperature for both continuous and interrupted cutting will increase. Specifically, cutting speed increase from 250m/min to 350 m/min, tool-workpiece temperature increase about 25% at each increment level. The tool-workpiece temperature increase about 16% when the feed rate increases from 0.1 mm/rev to 0.2mm/rev. While, 27% increment was recorded when feed rate increase to 0.4 mm/rev. With the increase of depth of cut, the tool-workpiece temperature recorded an increment between 50oC to 65oC for both continuous and interrupted cutting.