bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Roller Eccentricity Compensation in a Cold Mill
Authors: Gao Qi Ming , Wu Li Li , Zhao Guo Qing
Published: August 2011

With the increase request of strip quality, the roller eccentricity has become the important factor of influencing product quality. On the practical model of Cold-rolling Mill of 300, this paper establishes eccentricity compensation control practice of Cold-rolling Mill of 300 which applies wavelet transform method. Based on mufti-resolution decomposition of roll force signal by use of wavelets, eccentricity signals are separated from disturbances and noise,and self-optimization is employed to real-time control the roller eccentricity. The results show that the method is effective.
Study on Soft Zone of Type 420 Stainless Steel Weldment during the Induction Brazing Process
Authors: Chou Di Hsiang , Tsai Hsien Lung
Published: August 2011

Tungsten carbide (WC) is often induction welded to tougher and economical material, such as martensitic type 420 stainless steels (SS 420), to form a hybrid cutting tool stock. However, undesired softening in the SS 420 next to the fusion interface usually occurs. This softening is due to localized carbide precipitation in SS 420 matrix arising from heating during the induction brazing process. The aim of the present work is to investigate the soft zone of the SS 420 weldment by controlling the heat input during induction brazing. The result showed that cooling rate has a great effect on softening of the SS 420 weldment during induction brazing.
Application of Intelligent Data Mining Method for Traffic Forecasting
Authors: He Wei , Xiong Jie
Published: August 2011

Potential knowledge useful for traffic management optimization is hidden in a huge amount of data. Previous works use the prior data pattern labels to train the artificial neural network to attain the intelligent data mining models. The performance of the models suffers from the experts’ experience. To relieve the impact of the human factor, a new hybrid intelligent data mining model is proposed in this work based on self-organizing map (SOM) and support vector machine (SVM). The SOM was firstly used to capture the clustering information of the database through an unsupervised manner. Then the identified samples were treated as input to train the SVM. To optimize the SVM model, the particle swarm optimization (PSO) algorithm was employed to tune the SVM parameters and hence the satisfactory SVM data mining model was obtained. 2000 practical data sets from the Intelligent Transportation Systems (ITS) were applied to the validation of the proposed mining model. The analysis results show that the proposed method can extract the underlying rules of the testing data and can predict the future traffic state with the accuracy beyond 97%. Hence, the new SOM-PSO-SVM data mining model can provide practical application for the ITS.
Numerical Simulation of NO Conversion in the N2/O2/NO by Dielectric Barrier Discharge
Authors: Yin Shui E
Published: August 2011

The SO2 and NOX from the coal-fired power station are the main gaseous pollutants in the air, which causes acid rain and photochemical smog. However, the two consequences are recognized as one of the most serious global environment problems and must be controlled. The electro-catalysts oxidation technology is capable of oxidized the NO which the wet flue gas desulfurization processes (WFGD) could not achieve this goal, the products from the electro-catalysts oxidation reactor entering the WFGD and to removal then removed simultaneously. In this work, a plug-flow reactors model is presented that can describe the conversion of NOx by the discharge treatment of the exhaust gases at low temperatures and at atmospheric pressure in dielectric barrier reactors. The model takes into account the behavior of a plug-flow reactor are simplified versions of the general relations for conservation of mass, energy, and momentum. The variation regularity of the generated nitrogen oxides, the main free radicals, and the rate of NO produce (ROP) were be analog by take the plug flow reactor (PFR) model of chemical reaction kinetics in the mixed flue gas of N2/NO/O2 , and trying to seek out the dominant reactions relation to production and consumption NO in the non-equilibrium plasma system. The results indicated that the dominant free radical is the O3 in the mixed flue gas of N2/NO/O2.
Structure and Properties of Regenerated Cellulose Film with Fluorocarbon Coating
Authors: Zhang Yu Hui , Ji Quan , Qi Hong Jin , Sun Xi Quan
Published: August 2011

Fluorocarbon coatings were deposited on the surface of regenerated cellulose films by RF magnetron sputtering, using polytetrafluoroethylene targets. Argon was used as the working gas. The coatings were characterized by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, atomic force microscopy, and static contact angle and oxygen permeability measurements. It was found that the coatings were made up of the four components -CF3, -CF2-, -CF- and -C-. The [F]/[C] ratio varied with sputtering conditions. The static contact angle of the coatings was greater than 90° at lower power and higher pressure, and the substrate material was transformed from hydrophilic to hydrophobic character. The fluorocarbon coatings were porous and did not influence the oxygen permeability of the cellulose film substrates.
Study on the Hydrolytic Stability of Borate Ester
Authors: Wang Qi , Zheng Guo , Ai Jian Jie , Wei Xue Jing
Published: August 2011

In this paper, borate ester had been synthesized by the raw materials glycerol and boric acid. The hydrolytic stability of borate ester was made in-depth study by Karl Fischer trace water analyzer. The result shows that the method was simple and accurate. It not only determined the hydrolytic stability of borate ester, but also quantified the extent of its hydrolysis which had important significance in actual production.
Study on the Tribological Properties of Porous UHMWPE
Authors: Wu Gang , Zhong Xian You , Qin Hong Ling , Zhao Chun Hua
Published: August 2011

Porous UHMWPE were prepared by hot press molding in Metallographic Sample Mounting. The tribological properties of normal UHMWPE and porous UHMWPE were studied under different loads and lubricant on an improved tribological tester. The friction coefficient and wear loss of porous UHMWPE are steady and low under low loads, which attribute to the porous structure and extrusion effect of lubricant in testing. The results also show that the lubricant of BSA is better than that of water by its high viscosity. Among the increasing of loads, friction coefficient and wear loss are enhance rapidly. Serious cutting is the wear mechanism for porous UHMWPE under high loads.
Pechini Sol-Gel Fabrication and Luminescent Properties of Lu2SiO5: Ln3+ (Ln=Tb,Ce) Thin Films
Authors: Shen Si Qing , Xu Zhi Bin , Ma Qing , Xie Jian Jun , Shi Ying , Xu Jia Yue , Ai Fei
Published: August 2011

Ln3+ (Ce3+ and Tb3+) -doped Lu2SiO5 thin films were fabricated by Pechini sol–gel method combined with spin-coating technique on silicon substrates. The results of XRD patterns indicate that the films are completely crystallized at 1100 °C, the AFM observation reveals that the phosphor films are uniform and crack-free, consisting of closely packed grains with an average size of 200-300 nm. The PL and PLE spectra show the characteristic emission for Tb3+ and Ce3+, the optimum concentrations are found for LSO:Tb3+ (8%) and LSO:Ce3+ (2%) with respectively, the effect of heat-treatment temperature on the luminescent properties is also investigated.
An Analysis on Technology and Product Quality Effect of II-Powdery Emulsion Explosives
Authors: Guo Jun , Gan De Qing , Tan Jing
Published: August 2011

This paper discusses the effect factors and proposals between milling process of Ⅱ-powdery emulsion explosives and raw materials, production process parameters. The effect from percentage of the additive M on dispensability and detonation parameter of explosive can be analyzed through the experiments.
Synthetic Technology and Performance of a Novel Fatty Alcohol Polyoxyethylene Carboxylate Surfactants
Authors: Lei Yuan Yuan , Zheng Guo , Sun Yu , Zhou Yong
Published: August 2011

In this paper, with fatty alcohol polyoxyethylene (AEO9), succinic anhydride (SA) and sodium hydroxide as raw materials, a new type of fatty alcohol polyoxyethylene carboxylate surfactants (SAE9C-Na) was obtained by esterification and neutralizing effect. The influencing factors were researched and its surface properties were studied. The optimum condition of synthesis was determined: molar ratio of alcohol to acid was 1:1.1, reaction temperature was 85°C, reaction time was 60 min, under this condition, the yield could reach up to 95.8%. The results received from this experiment showed that SAE9C-Na had excellent surface activity and foaming and foam stability, whose emulsification and solubility enhancement were improved greatly.
Application of the Intelligent Sensor in Yarn Quality Online Detection
Authors: Huang Qi Lan , Qin Wei Gang , Yang Gong Yuan
Published: August 2011

This paper introduces application of the intelligent sensor in the yarn quality online detection. Using computer control techniques,Adopting the high accuracy intelligent laser sensor to detect the yarn diameter, display and print out the real-time evenness of the yarn by analyzing the yarn sampled datas. The device is more portable, forward-looking, intelligent and low cost, It is the development direction of the yarn quality testing in cotton factory.
Effect of Hot-Rolled Microstructure on the Recrystallization Texture of Cold-Rolled Non-Oriented Electrical Steel
Authors: Jin Zi Li , Li Wei , Li Yi Ming
Published: August 2011

With the help of orientation distribution function (ODF) analysis, experiments of different hot band grain microstructure 0.33% silicon steel were cold-rolled and annealed in the laboratory，to study the effect of the microstructure hot-rolled steel strip for cold rolled non-oriented silicon steel microstructure and texture of recrystallization annealing. The results show that hot rolled microstructure on cold rolled Non-Oriented Electrical Steel cold-rolled sheet evolution of texture and recrystallization have important influence, the quiaxed grain structure of steel by cold rolling and recrystallization annealing, the recrystallization speed than the fiber grain-based mixed crystals recrystallization fast , With the equiaxed grains made of cold rolled silicon steel after annealing the {110} texture components was enhanced and {100} texture components weakened. Different microstructure condition prior to cold rolling in the recrystallization annealing process the texture evolution has the obvious difference, the equiaxial grain steel belt cold rolling and annealing, has the strong crystal orientation. This shows that the equiaxed grain when hot microstructure is detrimental to the magnetic properties of cold-rolled non-oriented silicon steel to improve and increase.
The Preparation of a Novel Composite Film Based on Polyoxometalate for Visible Light Photocatalysis
Authors: Li Dan Feng , Liu Yan
Published: August 2011

The composite film, FeW11O399-(FeW11)/TiO2/ SiO2, was prepared by liquid phase deposition method (LPD) at low processing temperature for the first time. Formation of the stable composite film is due to strong chemical reaction of ≡Ti-OH from TiO2/SiO2 with the surface oxygen atoms at vacant sites of FeW11. The structural properties of the film were characterized using FT-IR、UV-vis spectra, Elemental Analysis. The experimental results confirmed the retention of the primary Keggin structure and the saturation of the surface of the lacunary FeW11; Formation of Ti–O–Si bond implies that the TiO2 crystallites highly dispersed on the silica surface via oxygen as a bridge. The catalytic activity was tested by the photo-degradation of aqueous azo dye congo red (CR) (0-20 mmol•L-1). The resulting film exhibited efficient visible-light photocatalytic activity to decompose aqueous azo dye CR，which is mainly attributed to long time existence of Fenton-assisted FeW11/TiO2/SiO2 excitation state. According to the experimental results, a synergistic effect mechanism of the photodegradation process is proposed.
The Deformation Rule of the Cooled U75V Heavy Rail Caused by the Different Heat Transfer Coefficient
Authors: Gao Ming Xin , Wang Pei Long , Jia Hao , Tong Shan Hu , Song Hua , Yuan Si Yu , Wang Zhong Qiang
Published: August 2011

When rolled heavy rail is on the cooling bed for natural cooling, the heat transfer coefficient has important effect on the bending and section sizes of cooled heavy rail. In the paper, the heat-stress couple module ofANSYS software is adopted to carry on numerical simulation on the cooling process of 60kg/m U75V heavy rail, and we obtain the change rule that heat transfer coefficient has effect on bending curvature and section sizes of cooled heavy rail. This study is of great reference value on cooling bed design and the formulation of cooling technological parameters for high speed heavy rail.
The Optimization Design of Cheese Bionic Kneader with Response Surface Method(RSM)
Authors: Wu Bai Zhong
Published: August 2011

One kind of cheese kneading experiment test rig was designed, which can imitates artificial kneading movement. Response surface method was used to enhance the performance of the machine. It was investigated that the influence of crank rolling velocity, crank length and crank angle on kneading quality and efficiency. The results show that factors influence the working efficiency list in order as follows: the crank rolling velocity, the angle between a connecting bar and a kneading bar, the crank length. The best combination of optimised parameters are: the crank rolling velocity is 62r/min, the crank length is 28mm, the angle between a connecting bar and a kneading bar is 125°.
Calculation of Statistical Values (S′) of Phase Structure Formation Factor (S) and Application to Solidification Theory of Cast Iron
Authors: Gao Zhi Yu , Xue Wei Hua , Ren Xin , Sun Yue Jun , Yang Shao Bin
Published: August 2011

Statistical values (S′) of phase structure formation factor (S) of alloying elements in cast iron are calculated by the calculation method on statistical value of alloy phases electronic structure parameters based on the empirical electron theory of solids and molecules (EET), and the solidification process of cast iron is discussed by S′. According to the effects of phase structure formation factor (that isS′) on the formation process of graphite, cementite and austenite, electronic structure parameters criterion of graphitization behavior of alloying elements is advanced and the results agree well with the practical cases.
Effect of Shoulder Diameter on the Resulting Interfacial Regions of Friction Stir Welds between Aluminium and Copper
Authors: Akinlabi Esther Titilayo , Akinlabi Stephen
Published: August 2011

This paper reports the effect of shoulder diameter on the resulting interfacial regions of joints between aluminium and copper produced by the friction stir welding process. The welds were produced using three shoulder diameter tools, viz; 15, 18 and 25 mm. This paper focuses on welds produced at a constant rotational speed of 600 rpm and feed rate of 50 mm/min varying the shoulder diameters. Analysis of the force feedback revealed that the advancing force, the downward vertical force and the torque increases as the shoulder diameter increases. Microstructural characterization was conducted on the joint interfaces and it was observed that the widths of the interfacial regions comprising of the Stir Zone and the Thermo – Mechanically Affected Zone (TMAZ) increases as the shoulder size increases.
Design of Hydrostatic Pressure Tests Automatic Control System on Oil Pipeline (bolster) by PLC and IPC
Authors: Wu Jing , Chen Guo Jie
Published: August 2011

The design and basic implementation of hydrostatic pressure tests automatic control system on oil pipeline(bolster) by siemens PLC and Huabei IPC were elaborated in the paper. The hardware and software flow chart on electrical controls were explained, the application interface was showed. From the actual conditions, the systems possess trusty running and high cost-effective and promotion prospects.
Research and Application of Genetic Algorithm in Material Handling Route for Assembly Line of Airbag
Authors: Wan Jian Ye , Jiang Xin , Wang Yun Peng
Published: August 2011

According to handling route of assembly line of airbag optimization problem, handling path planning mathematical model is established. Based on natural coding genetic algorithm, combining with JH company assembly line of airbag layout and the actual situation of material handling, using MATLAB software to realize the genetic algorithm, production logistics fields materials handling route problem in the optimization method is put forward. To solve production enterprise assembly line material handling route optimization problem, and has certain directive role.
The Study on Precipitation Characteristics in 6082 Aluminum Alloy with Cu Addition
Authors: Jin Man , Xia Chao Feng , Shao Guang Jie
Published: August 2011

The effects of Cu addition on precipitation characteristics in 6082 Al-Mg-Si alloy was investigated by means of DSC、TEM and 3DAP. It was found that addition of Cu has distinct effect on the precipitation and dissolution process of precipitates during heating by DSC measurement, the presence of Cu promotes the formation of GP zone or atomic clusters and accelerates the precipitation of β¢¢ . The precipitation sequence in the 6082 alloy with 0.6%Cu addition is as follows:SSSSatomic clusters/GP-zonesβ¢¢ + Q¢ Q¢.
Modeling and Simulation with Finite Element Method in Car Seats
Authors: Wang Jian Li , Li Yu Guang , Wang Shu Fen
Published: August 2011

The 3-D solid model with the software of Pro/Engineer was established. The computer aided engineering model of car seat with the methods “solid elements” was established. The elasticity of seat with ANSYS was calculated. Compared with the “force—distortion” curve of seat test, we examined the validity of modeling and the definition of materials.
Research and Implementation of Batteries Charging Management System for Electric Vehicle
Authors: Shi Jing , Shi Li
Published: August 2011

The batteries charging management system monitories and controls the batteries charging process, which can prevent battery from over charge, over voltage, over current, and extend battery life and maintenance battery performance better. This charging management system achieves through using of VC software, on the charge of the PCI-8310 module into the interface card and the PCI-8407 output interface card. In this charging system, charging balance controlling can ensure the charging balance of each battery. This batteries management system hardware circuit is simple, fast processing speed, high reliability and real-time monitoring.
Effect of Mineral Mixture of Steel Slag and Blast Furnace Slag on the Properties of Cement
Authors: Zhang Zuo Shun , Lian Fang , Liao Hong Qiang , Xu Li Hua , Li Xiang Yang , Zhao Hong Ning
Published: August 2011

The influence of powder mixture of steel slag and blast furnace slag on the physical properties of cement paste was investigated. Besides, the effect of chemical activator on powder mixture was also studied. For these purposes, the powder mixtures with different ratio of steel slag to blast furnace slag were blended with Portland cement. The water requirement of normal consistency, setting time, and soundness of cement were measured. Water glass and anhydrite were used to stimulate the activity of powder mixture. And the microstructure of hydration products was observed using scanning electron microscope (SEM). It was concluded that powder mixture could improve the fluidity of cement paste and prolong setting time. The effect of compound activators was better than a single one. Under the action of activators, the activity of powder mixture reached to the level of S95, when the proportions of steel slag were from 10% to 30%.
Effects of Pulse Electric Field on the Clusters of Pb-Sn Molten Alloy
Authors: Zhang Zhen Bin , Wang Jian Zhong
Published: August 2011

The authors investigate the effect of electric pulse field (EPF) on the grain size of Pb-Sn alloy and conclude the optimization parameter of EPF through the specialized experiment. Applying the electric dipole theory, the electro-migration theory and combining with the electrostatic force analysis, the author explain that the EPF can modify the liquid structure, can make the smaller cluster reorganized and growing up and at the same time can make the bigger cluster fission, then induce the cluster scale to the same and therefore improve the solidification structure from the theory point of view.
Research on Energy Absorption Characteristics of Honeycomb Sandwich Panels
Authors: Hou Shu Juan , Ren Li Li , Dong Duo
Published: August 2011

Due to the excellent mechanical properties combined with high strength to weight ratio, honeycomb sandwich panels (HSP) are used increasingly in aerospace, automobile and marine industries. In order to improve the crashworthiness of vehicle body, it is of great significance to study the energy absorption characteristics of the components. For this reason, specific energy absorption (SEA: the energy absorption per unit mass) of HSP was selected to be the objective function in order to find an optimal design of HSP under impact loading. The explicit finite element analysis (FEA) was used to derive response surface (RS) model of SEA, and a single-objective optimization was performed to get the optimal design. Before the optimization design of HSP, the energy-absorptions of HSP and the honeycomb core (HC) were compared with each other. It was found that HSP could absorb much more impact energy than HC due to the stabilizing effect of the face sheets during the process of crushing.
Effect of Pulse Electric Field on the Columnar Crystals Growth of Al-5.6 Wt.%Cu during Unidirectional Solidification
Authors: Chang Guo Wei , Chen Shu Ying , Li Qing Chun , Guo Li Li , Yue Xu Dong
Published: August 2011

The influence of pulse electric field on the columnar crystals growth has been studied by employing pulse electric field vertically to the solid/liquid interface during unidirectional solidification. The results showed that the pulse electric field was favorable to columnar crystals growth with the increase of pulse electric field intensity when the liquid phase was the positive electrode of pulse electric field. The formation of equiaxed crystal was accelerated when the degree of composition supercooling in front edge of solid/liquid interface reached the degree of nucleation supercooling by pulse electric field. When the liquid phase was the negative electrode of pulse electric field, the growth of columnar crystals was hindered, and the formation of equiaxed crystal was accelerated by pulse electric field.
Effect of Partitioning Temperature on Work Hardening Behavior of Q&P Steels
Authors: Zhu Shuai , Kang Yong Lin , Ren Kang Kang , Li Sheng Ci
Published: August 2011

Study on the instantaneous n-value of 0.3C-1.5Mn-1.5Si steel subjected to 1-step quenching and partitioning process (Q&P) is presented. The result indicated that the curves of instantaneous n-value vs. true strain could be divided into three stages. First, the instantaneous n-value shows a rapid decrease, then a comparative stable stage was observed due to the TRIP phenomenon of retained austenite, at last the instantaneous n-value decreases sharply to zero when necking appearance. The relationship of instantaneous n-value and partitioning temperature (PT) was analyzed; n-value decreased along with the rise of PT due to a higher carbon concentration and lower volume fraction of retained austenite was obtained at higher PT which could influence the uniform elongation and the stability of retained austenite.
Characterization of Ag Doped P-Type ZnO Thin Films Prepared by Electrostatic-Enhanced Ultrasonic Spray Pyrolysis
Authors: Min Jia Hua , Liang Xiao Yan , Wang Bin , Zhao Yue , Guo Yun , Wang Lin Jun
Published: August 2011

In this paper, the structure, electrical and optical properties and stabilities of Ag doped p-type ZnO thin films, prepared by electrostatic-enhanced ultrasonic spray pyrolysis were investigated. XRD and Hall data analyses indicated that the resistivity of 4at. % Ag doped p-type ZnO was low, without Ag2O phase separation. The optical transmission spectra illustrated that optical band gaps decreases with the gradual increase of Ag dopant. Moreover, ZnO: Ag films placed for 10 days still showed p-type, but the optical transmittance decreased, suggesting that AgZn in the ZnO: Ag thin films captured electrons to generate Agi, which reunited to be Ag nano-particles and decreased the optical transmittance of ZnO: Ag.
Heteroepitaxy of ZnO Films on Epi-GaN/Al2O3(0001) by MOCVD
Authors: Yu Qiao Qun , Ma Jin , Luan Cai Na , Kong Ling Yi , Zhu Zhen
Published: August 2011

Single crystalline ZnO thin films have been deposited on epi-GaN/sapphire (0001) substrates by the metalorganic chemical vapour deposition (MOCVD) method. The structural and optical properties of the ZnO films were investigated in detail. The film prepared at 600°C was epitaxial single crystalline with the wurtzite structure of pure ZnO and a single orientation of (0002) direction. High-resolution transmission electron microscopy was used to investigate the interface area, and a clear orientation relationship of ZnO (0001) || GaN (0001) and ZnO [] || GaN [] was obtained. The average transmittance for the samples in the visible range was over 75%.
Injection Molding Preparation and Film Formation Performance of Powders-Modified Polyethylene Biomass Carrier for Aerobic Process
Authors: Hai Jing , Chen Hai Yan , Cheng Jiang
Published: August 2011

A simple injection molding process was proposed for manufacturing polyethylene (PE) biofilm carrier composited with various powder additives including hydroxyapatite (HAP), starch, bagasse, activated carbon(AC) and magnetic powder(MP) as slow-released nutrients in wastewater biological treatment. The powders were also responsible for improving the hydrophilicity and biomass affinity of the carrier. Pre-attachment between powders and PE particle may achieve great improvement in flow ability of particle-powder mixture during injection molding process. The slow release rate of nutrients (mainly water-soluble starch) from the modified carrier to wastewater can be controlled by the amount of bagasse and activated carbon supplemented in the carrier. The contact angle of a water droplet on the polyethylene surface decreased from 80° to 59° after modification, and the period of biofilm formation on the modified carrier with acclimated sludge reduced from 7 days (on PE carrier without additives) to 4 days. The amount of attached biomass on the modified carrier was also found about twice as that on the common PE carrier. The strength performance test demonstrated the capability of long-term operation for the modified carrier in practical application.
Morphology Control of Cobalt Oxalate Particles under the Action of Pulsed Electromagnetic Field
Authors: Du Hui Ling , Zhou Yan Jun , Qi Jin Gang , Wang Jian Zhong , Liu Ai Min
Published: August 2011

It is very important for spheroidic metal cobalt powders production to control the morphology of cobalt oxalate powders precursor. The spheroidic cobalt oxalate powders were prepared by conventional precipitation when a pulsed electromagnetic field (PEMF) was introduced. Scanning electron microscopy (SEM) images and X-ray powder diffraction (XRD) were used to characterize morphologies and phase structures of the cobalt oxalate powders. The research results show that a pulsed electromagnetic field (PEMF) play a key role in the process of preparation of spheroidic cobalt oxalate powders. In addition, a possible morphology control mechanism was preliminarily discussed based on the effects of PEMF on the process of growth of cobalt oxalate particles.
Fabrication and Characterization of Yttrium Lanthanum Oxide Transparent Ceramics Using Powders Prepared by Different Methods
Authors: Li Yun Han , Yang Qiu Hong , Lu Shen Zhou
Published: August 2011

Yttrium Lanthanum Oxide transparent ceramics were fabricated with (Y0.9La0.1)2O3 powders prepared by different methods. The growth characteristics, physical and chemical properties of the powders were investigated. The wet-chemical composite powders’ particle size was inhibited by La2O3 at high temperature treatment, therefore smaller than that of powders by solid-state reaction method. During the solid-state reaction between La2O3 and Y2O3 at temperature of 700~1100°C, La2O3 may have not effectively hindered the particle growth of Y2O3. (Y0.90La0.10)2O3 ceramic fabricated by both powders own smaller grain size and lower porosity than Y2O3 ceramics. The transmittance and sintering performance of Y2O3 ceramics were also improved after adding of La2O3. The powders prepared by both methods could be used to make high transparency ceramics.
High Responsive ZnO Nanowire UV Sensor
Authors: Meng Lei Xin , Zhang Lian Zhu
Published: August 2011

UV (ultraviolet) sensor is widely used in many fields such as missile early warning, spacecraft autonomous navigation, global positioning and so on. Comparing with other semiconductor based UV sensor, ZnO nanowire (NW) UV sensor have many unique advantages including visual light blind, biocompatible, low cost and so on. But, two main shortages, low photo response () and long recover time, embarrass the application of single wire ZnO UV sensor. In this paper, we introduce the working principle of ZnO NW UV sensor and expound some methods for increasing photo response, enhancing sensitivity and shortening response and reset time of ZnO NW UV sensor. Besides this, we introduce a kind of UV sensor fabricated by integrated ZnO NWs recently. The photo response of this UV sensors reaches the order of mA, when exposed to UV light at 4.5 mW/cm2. It also has perfect stability and reliability. Because of these properties, this new kind of UV sensors has a great potential for application.
Automatic Setting Control of the Raw Slurry Blending Process Based on the Case-Based Reasoning
Authors: Yin Lun Hai , Bai Rui , Guo Wan Li
Published: August 2011

Raw slurry blending process is the key process in the sintering alumina production. In this blending process, raw materials are alkali powder, red mud, blending ore and limestone, and the product is the raw slurry. The optimal operation control objective of this blending process is to make the quality indices of the raw slurry into their targeted ranges. The key step to realize this control objective is to decide the appropriate set-points of the control loop. An automatic setting control method is proposed in this paper. During the setting process, case-based reasoning is adopted to obtain the appropriate set-points of the control loops according to the process data and state. By using this setting control method, appropriate set-points can be obtained and the operation control objectives can be realized.
The Phase-Field Simulation of the Grain Growth under External Field
Authors: Zhang Li Li , Gao Ming , Tang Shao Nan
Published: August 2011

A new phase field model coupled with external field was used to simulate 2D and 3D grain growth processing. The simulation results showed that 2D grain size distribution under external field was inhomogeneous. The evolutions of 2D grain under different external field strength were roughly the same, but the grain number was obviously different with the changes of external fields. Under the external field, the relationship between 2D grain area and time was linear. 3D grain distribution was inhomogeneous in the direction of the external field gradient. The nucleation gradually decreased in the direction of change.
Orientational Analysis on Static Recrystallization at Tension Twins in AZ31 Magnesium Alloy
Authors: Li Xiao , Yang Ping , Meng Li
Published: August 2011

The deformation depends on twinning in Mg alloy, and twins will be the dominant recrystallization nucleation site. Tension twinning proceeds much more easily than compression twinning since its volume fraction is much higher than that of compression twins, which may have a promotive effect on the recrystallization to a certain degree. Based on the previous research on the static recrystallization at compression twins, the evolution of microstructure and texture in AZ31 magnesium alloy during its static recystallization at tension twins was further investigated; and the orientational characteristics of new grains formed at tension twins in the early stage of static recrystallization were analyzed by EBSD technique. The results showed that the strong basal texture was retained and weakened with no new texture component being detected during annealing. New grains were observed to nucleate preferentially at the intersections of tension twin variants or the intersection between tension twins and compression twins. Their orientations are relatively random and are strongly scattered from those of original tension twins or compression twins. A comparison of the recrystallization at tension twins and compression twins was further made.
Research of a Measuring System for UV Absolute Spectral Response Based on ECPR
Authors: Hu Qi , Yang Yuan Yuan , Gao Peng Fei , Zheng Sui
Published: August 2011

ECPR (electrically calibrated pyroelectric radiometer) is a kind of electrical substitution radiometer with high precision in detecting optical power. With the development of the enhanced UV ECPR, a measuring system for the absolute spectral response of UV detector is built. The paper introduces the measuring methods of UV absolute spectral response based on ECPR, the configuration of the measuring system and the measurement results. The feature of the system is high precision, easy operation and automation. Also it provides a good solution for the measurement of absolute spectral response of UV source.
The Design of Automatic Detection and Classification System for Recycled Drill Pipe
Authors: Kang Yi Hua , Wu Jian Bo , Tu Jun , Sun Yan Hua
Published: August 2011

In order to meet oil production requirement, the automatic detection and classification system for recycled drill pipe is badly needed. After carefully analyzed the inspection process, a novel NDT method composed of MFLT (magnetic flux leakage testing) and UT (ultrasonic testing) on drill pipe rotating is designed. Afterwards, a geometrical dimensions measurement system for drill pipe by laser is developed. Additionally, drill pipe is automatically classified with the application of database and fieldbus technologies. Finally, the automatic detection and classification system is formed, which works stably and has a good application effect.
Study on Sub-Pixel Techniques for Accurate Image Measurement of Displacement
Authors: Xie Zhe Dong , Zhang Xin Jie
Published: August 2011

The high resolving power camera was often used to improve the precision of measuring system although its price is high, because the accuracy of image measure was limited by the pixel resolving ability of camera. A method of one dimension gray level quadrature sub-pixel to detect edge was presented. This method was applied to measure the displacement of measuring head on 3-coordinate measuring machine. The data of test was shown that this system can distinguish displacement 0.001mm. it is higher accuracy than pixel level. So this method is convenient and fast , fit to track and measure the moving object. It is obvious that this method can save the cost of hardware.
The Development of Fault Diagnosis Expert System for High Speed Construction Machinery Based on Portable Data Terminal
Authors: Deng Wei , Lu Ming , Lu Guo Liang , Cui Zhong Qing , Yang Xiao Qiang
Published: August 2011

To overcome the difficulty of field fault diagnosis in the complicated circumstance of construction machinery, the distributed expert system of fault diagnosis is developed in this paper. According to the technical requirements, the hardware platform based on smart industrial portable data terminal is performed. Meanwhile, the modular software of the fault diagnosis expert system is implemented. Its hardware is mainly composed of intelligent portable field testing unit as well as the central control computer. The software platform mainly consists of PDA modules for field fault testing and diagnosis, expert system module, maintenance support and data query module, training module, help module and report printing module. The work has greatly enhanced the capability of field fault detection, diagnosis and maintenance support in military units.
Study on one Kind of Test Method of Simplified Side Impact Using Sled Test
Authors: Liu Zhi Xin , Lou Lei , Yang Yun Sheng
Published: August 2011

Frontal sled test is an important platform that widely employed to predict and assess changes in overall safety performance as vehicle structural and occupant restraint parameters are varied. In this paper, a characteristic door intrusion velocity pulse in side impact was analyzed and a set of side test jig was designed, which realized one kind of simplified side impact sled test method. Then we compared the injury values of the side impact dummy, the result showed that there existed good correlation between sled test and full-vehicle test.
The Design about Gauge Visual Detection System between High Signals and Contact Net
Authors: Zhu Xi Lin , Yu Yong , Li Cheng Zhu , Hui An Feng
Published: August 2011

The gauge detection between high signal and contact net is an important part in railway safety production. According to the detection nature, this paper designed a visual detection system to solve the problem of gauge detection between high signal and contact net. Using template matching method to break up the gray target image, and using discovering turning point method to rebuild target in space. Then according to the principle, it prepared detection system based on VC++2008 and OpenCV. The experiment results showed that: measurement error was within士15mm, when detection distance was arrange from 45.0m to 55.0m. Detection system which had high accuracy and good reliability, met system design requirements.
Real-Time GPS Clock Monitoring with IGS Ultra-Rapid Products
Authors: Heo Youn Jeong , Cho Jeongho , Heo Moon Beom
Published: August 2011

The objective of this study is to develop a real-time strategy that results in higher precision than any real-time solutions currently available for GPS satellite clock monitoring. A real-time time transfer methodology was employed for satellite clock monitoring, composed of carrier phase smoothed code measurements and IGS ultra-rapid products to obtain precise satellite positions. The performance of the time transfer method was assessed by comparison with the results based on the all-in-view method using the broadcasting ephemeredes. The results showed that the stability of satellite clock monitoring for a short-term period was improved by the proposed method.
Acoustic Emission Analysis on Low Velocity Impact Damage of 2D C/SiC Composites
Authors: Wang Jing Shen , Yao Lei Jiang , Zhang Li , Li Bin , Chen Liu Ding , Tong Xiao Yan
Published: August 2011

An experimental study of low velocity impact (LVI) was carried out on 2D carbon fabric reinforced silicon carbide (C/SiC) ceramic matrix composites. The C/SiC composite specimens were impacted by using a free-drop impact machine at different energy levels ranging from 1J to 9J and acoustic emission (AE) technique was used to detect the damage process. The results indicated that AE signals could evaluate the LVI damage behaviors of C/SiC composites from the different aspects. By comparing impact load process with AE hits and AE amplitude, the damage process could be determined. In the loading stage, matrix cracking mainly occurred in the composites; when impact load reached peak load, delamination and fiber fracture started to produce; in the unloading stage, the damage modes were mainly delamination and matrix cracking. AE event count fractions could quantify the main damage modes at different impact energy levels. At lower impact energy, matrix cracking was the main damage mode; when impact energy were between 3J and 6J, delamination and matrix cracking became the main damage modes; at higher impact energy, fiber fracture was the main damage mode.
A Continuous Output Feedback Finite-Time Speed Tracking Control of PMSM
Authors: Yan Yan , Yu Shuang He , Yang Zhen Qiang , Du Jia Lu
Published: August 2011

A finite-time speed tracking control for a permanent-magnet synchronous motor (PMSM) is presented. The proposed control scheme depends on finite-time convergence of a fractional power differential equation. A continuous feedback controller for a PMSM is constructed based on the double integrator form of PMSM with a tricky coordination transformation. The simulation results show its efficiency.
State Characteristic Parameters Extraction Method of Wind Turbine Blades Based on the Length Fractal Dimension
Authors: Li Ya Feng , Xu Yu Xiu , Ma Xin Hua
Published: August 2011

According to characteristic of wind turbine vibration signal, base on the length fractal dimension principle, carry out quantitative description of length fractal characteristics to nonlinear signals on the fault generated by the wind turbine blades. The test and calculation results show that when the different wind turbine blades failures occur, the length fractal dimension value appear clear rules. Therefore, we can use the length fractal dimension effectively extract the fault character parameters of wind turbine blade.
A Multi-Scale Image Matching Recognition Algorithm Based on Phase Correlation
Authors: Tian Yong Gang , Wang Min Gang , Fan Ying Ping
Published: August 2011

The image matching recognition method of phase correlation is based on the shift characteristics of the Fourier transform. The traditional image matching recognition algorithm has significant influence of the template size upon its matching accuracy and has weak resilience to noises except for the gauss noise. Addressing these shortcomings, we proposed a multi-scale matching recognition method based on phase correlation, combined with wavelet transform and edge detection. The algorithm, processed the reference image and the template image in different scales with such steps: decomposition, denoising, reconstruction, edge detection and the Fourier transform, phase correlation. Hence, it overcome the dependence upon template size effectively and improve the reliability and the resilience of various noises. Finally, we verified the algorithm with a real ground shooting image as the reference image and an intercepted part as the template image. The results have shown that the proposed approach is better than the traditional image matching method.
Study of Polyphase Decomposition Zoom-FFT Algorithm in Non-Invasive Motor Monitoring System
Authors: Zhang Yuan Liang , Gao Yan , Jiang Peng Sen , Xu Hai Yang
Published: August 2011

The design philosophy of non-invasive has been introduced in motors monitoring system, in which used air-gap torque to measure efficiency. Zoom-FFT is required for the testing of speed which very few assumed values are required. An efficient implementation of cosine modulated FIR analysis synthesis filter banks is derived. The structures for the analysis and synthesis sections consist of polyphase structure and discrete sine and cosine transform networks. The redundance of computation is removed and the computational efficiency is raised. The implementation structure is simpler. The efficiency of the whole system has been improved, and approved that this algorithm has a good value.
Quality Detection and Specie Identification of Apples Based on Multi-Spectral Imaging
Authors: Tang Chun Xiao , Li En Bang , Zhao Chuan Zhen , Li Chao
Published: August 2011

This paper introduced an apple quality detection and specie identification system based on multi-spectral imaging. Under an international mixed light illumining, system can capture red, green and infrared images of apples at the same time. A software programmed based on Matlab 6.5.1 is used for image processing to complete the detection of quality and specie. According to processing results, the subtotals and classification are made into grading standards. These can be quickly and easily applied to the automation of agriculture fruit grading system. In the experiment, some most common apples including Fuji apple, Red delicious apples, Green apples, Gina Apple's were detected for quality and variety . Accuracy rate can be more than 90%.
A Rapid Way to Build Prototypes of Wireless Sensor Network Based on Virtual Instruments Technology
Authors: Zhang Xing Cheng , Fu Yun Xu , Yu Jin Yong , Yan Yue Peng , Liu Jian Qiang
Published: August 2011

This paper presents a new approach to build prototypes of Wireless Sensor Network rapidly based on virtual instruments technology. There are two different methods introduced in this paper. One of the two methods uses WSN (short for Wireless Sensor Network) Node and WSN Gateway manufactured by NI (short for National Instruments). The other method adopts Compact RIO (short for Reconfigurable Input and Output) and GPRS (short for General Packet Radio Service) module. Though they are two different methods, they have the same structure. Both of the two methods adopt DAQ (short for data acquisition) card and sensors to acquire specified data. The DAQ card and sensors compose a node which can sense and process data. Different nodes form a local area WSN. Nodes within a local area WSN communicate with each other via ZigBee or other means of communication. The local area WSN can access the Internet via a WSN Gateway or GPRS module. Modular hardware and graphic programming language LabVIEW (short for Laboratory Virtual Instrumentation Engineering Workbench) are adopted in this proposed approach.
The Mechanical Properties Study of Woven Fabrics
Authors: Liu Yao , Deng Zhong Min , Chen Yi Ren
Published: August 2011

Now the Mechanical Properties of fabrics is widely studied, but always involve in one kind of fabric or a certain property. In order to further understand the fabric tearing strength comprehensively, through a lot of experiments, this article mainly study the single or multiple influences of warp and weft fineness, warp and weft density, warp and weft yarn strength, break elongation of warp and weft yarn, fabric thickness of five fabrics on single stitch tearing strength and trapezoid tearing strength. Then we use SPSS statistical analysis tools to conduct multiple linear regression analysis. We can conclude that warp and weft tightness of fabrics, warp yarn strength, elongation at break of weft yarn have the influence on tearing strength; When trapezoid Angle is changed from 27 degrees to 45 degrees, the influence of warp and weft tightness on it will become bigger, but the influence of warp yarn strength, elongation at break of weft yarn on it will become smaller, and so on.
A New ESP Design and Development Guideline Based on the System Vehicle-Driver-Environment
Authors: Gao Zhen Hai , Guo Jian , Guan Hsin , Dong Yi Liang , Qiao Yan Juan
Published: August 2011

Through the analysis of vehicle dynamic and characteristic and vehicle-road environment, the ESP stability boundary can be easily determined. But from the point of the system vehicle-driver-environment, ignoring the analysis of driver operation behavior in extreme situation, it is difficult to determining the system optimization direction reasonably and improving the ESP system control quality based on the analysis of ESP system response performance and vehicle comfort performance when brkae intervening. Based on the driver’s complaint analysis in ESP performance test, combing with the aim of active safety system, this paper comes up with a set of new guidelines to design and development ESP system from the point of vehicle-driver-environment system.