bluuebunny/crossref_metadata_2025 huggingface dataset:
Robust Design Based on Grey Correlation Analysis
Authors: Xue Lian , Dong Le Le
Published: September 2013

In this article, the grey correlation is regarded as the decision index of Multiple Quality Characteristics of the Robust designed by the grey system theory. Then using the Analysis of variance to get the factors of Significantly affecting the stability and the best parameter. At last advantage of the method is proved by examples. It proves that grey system theory in robust design is practical greatly.
A Dynamical Coefficient Mechanics Model for Fatigue Crack Growth under Variable Amplitude Loading
Authors: Gu Li Xiong , Liu Zhi Fang , Xu Zhong Yong
Published: September 2013

Almost all load bearing components usually experience variable amplitude loading (VAL) rather than constant amplitude loading (CAL) during their service lives. The present study aims at evaluating residual fatigue life under VAL by adopting a dynamical coefficient mechanics (DCM) model which we have reported. New formulas connecting the crack length with number of cycles and expressions for the FCG rate under VAL have been derived and were used to predict crack propagation. The ratios of predicted-to-experimental lives range from 1.00 to 1.04, which indicates that the results obtained from this DCM model are in good agreement with experimental data from published literatures and cover all stages of fatigue crack growth curve.
The Boot Method Analysis of Three-Phase Asynchronous Motor
Authors: Shang Miao , Lin Guo Min , Guo Qiang Hua , Sun Yong Tao
Published: September 2013

The boot method of three wound-rotor asynchronous motors and three-phase squirrel-cage asynchronous motor are described; As to reduce the start current and to increase the starting torque, the principle of all kinds of startup methods are analyzed; the advantages and disadvantages of various starting methods are evaluated; Development directions of modern motor startup are pointed out.
The Efficiency Analysis of Steam Turbine-Driven Feed Water Pump
Authors: Liu Ming Fu , Lu Gai Lin
Published: September 2013

The text introduces the structure of steam turbine-driven feed water pump briefly, analyzes the difference between steam turbine-driven feed water pump and electrically driven feed pump, and expresses the working principle of centrifugal pump. Besides, it researchs the advantage of raising head of multistage pump by the analysis of a three-level feed pump, states that pump power loss can be divided into mechanical loss, flow loss and volumetric loss respectively and sets up the mathematic model with the power and efficiency and concludes the calculation method of the overall efficiency of multistage pump and analyzes the relationship between the various power losses and rotational speed and presents specific measures to improve the efficiency.
The Optimization of Process Parameters of Large-Scale SAG Mill
Authors: Huang Xiao Bo , Huang Ya Yu , Sun Dian Feng
Published: September 2013

This paper is based on the kinetic theory of ore and steel balls in the SAG Mill and theoretical research of power consumption. Orthogonal method is taken to design experimental plan while effective power of the SAG Mill, collision times between steel balls and the SAG Mill and collision times between steel balls and ore are designed as optimal objectives. Model with 9 experimental points is simulated by EDEM and experimental data are disposed Range Method in order to get the optimal combination of operating parameters of the SAG Mill.
The Simulation Research of Dual Clutch Transmission's Starting Process Based on Dynamic Friction Coefficient
Authors: Qiu Ming Ming , Zhao Han , Sha Fa Ming
Published: September 2013

Introduce the dynamic friction coefficient of clutch friction plate. Establish Mathematical model of starting process, carried out vibration analysis for frictional sliding process systematically, validated the analysis using Matlab/simulink software. Meanwhile, compared with the starting process by static friction coefficient. The results show that using dynamic friction coefficient to analyse starting process conforms to the actual working condition.
DBR-Ag Micro-Cavity Organic Solid-State Lasers
Authors: Zhao Xuan Ke
Published: September 2013

A DBR-Ag mixed organic micro-cavity structure solid-state laser was proposed in this paper. The influences of center wavelength, growth sequence and the cycle number of DBR, and the thickness of Ag mirror and organic light-emitting layer on performance of Ag-DBR mixed organic micro-cavity were investigated by simulation. According to PL characteristics of Alq3:DCM (0.5wt%), an optimal metal Ag-DBR micro-cavity structure was designed, and based on theoretical calculation results, a corresponding micro-cavity devices (glass/DBR/organic layer/Ag mirror) was fabricated. The theoretical simulation and experimental results are in good agreement.
Function Innovation Design Model and its Application in Heating Equipment
Authors: Jin Hui , Guo Hai Xia , Cao Guo Zhong , Wei Sai Na
Published: September 2013

Function design is an important step in the process of product design. This article mainly focuses on process and realization of product function innovation. Function innovation and forecasting method is presented, and the product function innovation process model is proposed. Finally, the heating equipment is taken as an example to validate the effectiveness of the model.
Heat Transfer Characteristics of O2/CO2 Pulverized Coal Boiler Furnace
Authors: Gao Jian Qiang , Xue Nan Nan , Sun Xin , Xing Hai Kun
Published: September 2013

Global warming is currently one of the most serious environmental challenges in the world. The increase of CO2 in the atmosphere is a dominating factor to global warming .O2 / CO2 combustion technology is a new generation of clean coal power generation technology[1],it can directly capture high concentration of CO2 and make the pollutant resource ,so it is one of the most promising feasible technical to reduce CO2 emissions [2]. Compared with conventional pulverized coal combustion boiler, O2 / CO2 combustion technology can be used to produce a CO2 rich flue gas stream. So physical parameters had a very big change, such as flue gas heat capacity, motion viscosity, prandtl number and so on. Thus they affect the heat transfer characteristics [3] inside the furnace.In order to study the heat transfer characteristics of the furnace; this paper established a dynamic mathematical model for the radiation heat transfer progress of the furnace and adequate for control system design.
Numerical Research on the Change Regularity of S Series Airfoil Tip Vortex
Authors: Wu Wei Min , Dai Yuan Jun
Published: September 2013

This paper take the impeller of S series airfoil for instance, in view of the complex flow field which is in the condition for the optimum attack angle of design wind velocity with tip vortex, presents a new generating strategy of grid based on controlling gradient method which takes the non-uniform tetrahedral grid with gradient gradual change in the near blade wall flow field. The transition layer grid which is in the development from body-fitted field to the middle of the domain having relatively high density of grid contrast with the far flow field can well capture the size and location of tip vortex, and find that the decay rate of the vorticity magnitude of tip vortex of S series impeller is more quickly than the tip vortex of traditional airfoil impeller. As well as find a fraction of central vortex and tip vortex shaded into each other in the far field and Doppler effect in the downstream. Because the numerical experiment and analysis showed that through controlling gradient change of grid can get high precision of calculating results, can also get S series impeller had higher efficiency in conversion of wind energy contrast with NACA series impeller, so the generating strategy of grid is reasonable and effective.
Relation Formula of Study and Application in the Iproduct Parameterization Design of Pro/E
Authors: Zhou Hua Jun
Published: September 2013

Through case analysis method introduced in this paper using the relation formula of the Pro/E to complete a part fast modeling method, which can greatly improve work efficiency, for beginners will have high reference value.
Reliability Failure Analysis of PCB and its Technological Improvement
Authors: Zhu Li Fang
Published: September 2013

Reliability failure analysis is extremely important in the manufacturing process of PCB (Printed Circuit Board). In this paper, we use thermal shock test method to analysis the electrical interconnection reliability of PCB in harsh environment. Also taking into account the reliability of PCB is closely related to its design and technology, approaches of technological improvement are proposed. Finally through temperature shock test method, the results show that the reliability of PCB designed with improved technology is enhanced.
The Effects of Induction Motor Parameters on its Low Voltage Ride through Capability
Authors: Li Xi Nian , Wang Yan Wen
Published: September 2013

The induction motor (IM) is important equipment among industries. When voltage sag occurs, both the protective device like reclosure mounted in high voltage transmission and distribution lines and the terminal undervoltage tripping of contactor will make the IM disconnect away from the utility, with its terminal voltage changed from voltage sag to interruption. The IM will continue to operate because of inertia. The first-order dynamic model between slip, load torque and terminal voltage is set up based on IM steady-state equivalent circuit. And the universal analytic functions of slip and critical time are deduced from the model which can be used to evaluate the IM low voltage ride through (LVRT) capability, thus providing reference for the designation of IM.
The Modeling and Dynamic Simulation of U-Tube Steam Generator
Authors: Gao Jian Qiang , Xing Hai Kun , Sun Xin , Xue Nan Nan
Published: September 2013

For comprehensive research on the dynamics of U-tube natural circulation evaporator in plant, the modular and lumped parameters method is used to establish the mathematical model of U-tube steam generator. Steam generator is divided into three parts in the model: primary water side, U-tube metal side and secondary water side. Secondary water side includes five modules. Then, the dynamic simulation experiment can be made on the basis of the simulation model. The experiment results consistent with the actual data and the adaptability and rationality of the model are verified.
The Research and Application of Piston Hydro-Pulse Test Machine
Authors: Wang Ping Jiang , Fang Xin Jie , Fan Hai Min , Chen Ji Hong
Published: September 2013

As an important part of an engine, piston is working for a long time in the environment of high temperature, high pressure and pulse-pounding. Its working state and life directly affect the life of the engine. Piston fatigue failure plays an important factor of piston failure. Piston hydro-pulse test machine has important significance for studying the life of piston mechanical fatigue. The paper is about the design and use effect of domestic piston hydro-pulse test machine. Practice shows that the control technology of Piston hydro-pulse test machine, fulfills various indicators of piston fatigue tests, and has important significance for improving domestic piston design, production and usage.
Numerical Simulation of Random Vibration for Electrical Connectors
Authors: Huang Bo , Li Xun Bo , Zeng Zhi , Li Xiang , Fang Wen Hua
Published: September 2013

Random vibration is one of the main factors influencing the reliability of electrical connectors. In this paper, a Micro-USB electrical connector was chosen to be an object for this research. The finite element method was applied in random vibration analysis. At first, a three-dimensional model of the electrical connector was established by using Pro/E and ANSYS Workbench software. Then, the modal characteristics analysis was carried out and its modal parameters can be obtained from this analysis and the reliability of the electrical connector under the natural frequency can be also verified. Finally, according to results of the simulation, the equivalent stress and deformation response under 1 sigma levels hadn't changed much. The conclusions can provide a reference for the reliability analysis of electronic components.
Thermal Analysis of Li-ion Battery
Authors: Fofana Gaoussou Hadia , Zhang You Tong
Published: September 2013

Abstract. The paper has built 3D-FEA models to simulate the electro-thermal behavior of Li-ion battery cells with Pouch Cell and Prismatic Cell by ANSYS. As for two models, the Li-ion battery system is simplified as a single equivalent battery layer (Pouch Cell) or multiple equivalent battery layers (Prismatic Cell) with the equivalent electrodes and separator. They were simulated under air cooling conditions. Simulations were compared with available battery temperature measurements. This shows that the 3D electro-thermal model applied in this study characterizes the electro-thermal behavior of the Li-ion battery cells reasonably well.
Mass and Stiffness Modifications with Unmodified Eigenstructure Preserving
Authors: Yang Jun , Lu Xu Shi , Zhang Jia Fan , Ouyang Hua Jiang
Published: September 2013

A necessary and sufficient condition is proposed for the incremental mass and stiffness matrices that modify some eigenpairs while keeping other eigenpairs unchanged, which requires the knowledge of only the few eigenpairs to be modified of the original undamped vibration system. The application prospects are proposed based on this formulation.
Pre-Processing Techniques of Information Extraction of a Dielectric Sandwich Radome
Authors: Deng Kun , Sheng Ying , Qiu Yuan Ying
Published: September 2013

Radomes are adopted to ensure internal antenna systems work normally in severe environments. However, the presence of a radome will adversely affect the electricity performance of the enclosed antenna. A reasonable pre-process of the radome model is a prerequisite for completing electricity performance analysis successfully. Aiming at the difficulties of the design and assembly of curved surface parts, this paper presents a method of modeling and pre-processing by using Pro/E, Ansys and Ansys Workbench to extract element and node information effectively from the finite element model of the radome.
A High Efficiency Solar PV Micro-Power Supply Integrated with Wireless Sensor Nodes
Authors: He Yong Tai , Xiao Li Xian
Published: September 2013

In the wireless sensor nodes integrated with the solar PV micro-power supply, the solar energy conversion efficiency and utilization efficiency directly determine working life and stability of the wireless sensor nodes. Thus, a novel solar PV micro-power supply is designed which four solar cell arrays with same open voltage are designed and they are placed in top and three sides of the wireless sensor nodes. Simultaneous, the optimal voltage control technology is used to control work voltage of four solar cell arrays in the design. In addition, the prototype of wireless sensor node integrated with the solar PV micro-power supply is done. Moreover, the working characteristics of the prototype are tested in natural condition. The working voltages of four solar cell arrays are controlled in range of optimal voltage, and the solar cell arrays have high conversion efficiency. The output energy of system is increased about 50% by adding side solar cell arrays.
The Flow Analysis and Numerical Simulation of the Time-Pressure Dispensing System
Authors: Deng Luo Hong , Chen Zai Liang , Yang Xiao Min , Chen Zhen Yu
Published: September 2013

The fluid flow of the time-pressure dispensing system was analyzed. Dispensing fluid was analyzed by finite element modeling based on N-S equation. Use CFX module to simulate dispensing process, and obtain the flow fields corresponding velocity & pressure distributions. Study the change rules of the adhesive amount dispensed affected by the inlet pressure, diameter and length of the needle. Finally, compare simulation values with the spectral method for two order approximations, the reliability and applicability of the model is proved.
Study on a New Modeling Method of Equipment Support Base on Ontology
Authors: Bai Yan Qi , Sun Wang Hu , Wang Tao
Published: September 2013

In this paper, it studies the Ontology construction ofequipment support system with the Ontology construction technology. In the buildingprocess, the “Seven Step Method” has been improved, and it puts forward a new method suitable for the equipment support system. Then analyze the equipment support system in detail with system analysis method to build Ontology. Through the study, it aims at building up a sharing and reusing conceptual model.
Analytical Model for Strength of Clinched Joint in Aluminium Alloy Sheet
Authors: Yang Hui Yan , He Xiao Cong , Wang Yu Qi
Published: September 2013

The purpose of this study is to propose the analytical model for clinched joint, which can be used to predict the joint strength based on the neck-thickness and undercut of clinched joint. The analytical model has been defined as a function of neck-thickness and undercut based on the neck fracture mode which is the most reasonable and common failure mode for clinched joints. Clinching joining experiment with different joint geometric variables with RIVCLINCH 1106 P50 and tensile-shear test with MTS landmark were conducted. The comparison of the clinched joint strength between experiment and analytical model shows good similarity within 7.2% error. The analytical model proposed for clinched joint strength is valid to calculate the clinched joint strength.
Analysis of Thermal-Mechanism Coupled Stress Field of a Diesel Engine Cylinder Head
Authors: Liu Qi , Ouyang Guang Yao , Zhang Ping
Published: September 2013

The paper analyzed the temperature field, the thermal stress field and the stress field under mechanical loads of a diesel engine cylinder head with finite element analysis software ANASYS, then took above temperature field results and mechanical loads as boundary conditions to impose on the established model of cylinder head using the thermal mechanism indirect coupled method, researched the stress field and distortion of cylinder head under effect of multiplicative loads. The result indicates that the point of the highest temperature and the maximum thermal stress locates on the middle nose of fire deck; under thermal mechanism coupled effect, the points of maximum stress locate on the interface of bolt head and screw of cylinder head and on the middle nose of fire deck; the maximum pull stress the cylinder head undertook is less than that the material can survive; the distortion of the cylinder head is very small, thus has little influence on the fabrication of other accessories, and the global distortion of cylinder head performs symmetry.
Characterization of Phthalate Plasticizer from Bottled Beverages by GC-MS
Authors: Sun Qiu Ju , Li Lin , Jiang Zhong Li , Xin Shi Gang , Wu Shi Wei , Yu Li
Published: September 2013

A GC/MS method was established for the determination of phthalates plasticizers in bottled beverages. The calibration curves are all linear in the range of 0.01 to 5μg/L with correlation coefficients greater than 0.997. The recoveries are in the range between 97.27% and 105.05% under two levels. The testing data of the samples showed that the five bottled beverages all contained DBP, DIBP and DEHP plasticizers, and DIBP content was obviously higher than the other two.
Failure Analysis and Welding Repair for Reheater Tube Crack of 12Cr1MoV Steel
Authors: Zheng Xiang Feng , Wu Nan , Xue Rong Gang , Li Wen Bin , Dong Guo Zhen , Zhao Ji Feng , Chen Er Song , Sun Peng , Wang Qiang
Published: September 2013

Through methods, such as microscope analysis, chemical analysis, hardness analysis, metallography examination etc, the causes resulting in reheater tube cracking of 300MW station boiler have been analyzed. The result indicates this reheater tube cracking is reheat crack. The higher sensitive temperature in operating, excessive welding residual stress are the primarily inducement of cracking. In welding repair, the measures , such as replacing the material ,lower welding heat input, preheat treatment and so on, were taken. The welding repair succeeded greatly.
Influence of Different Material of Penetrator on Micro-Hardness of Steel Target
Authors: Tian Kai Wen , Zhu Li Jun , Wang Zhen Ming , Shi Wen Lu , Zou Min Ming , Shi Hong Gang
Published: September 2013

Contrast ballistic tests were carried out on 93W alloy and W fiber reinforced Zr-based bulk metallic glass composite. The influence of penetrator material on micro-hardness around target crater was studied using microstructure observation and micro-hardness test. The results show that adiabatic shear band appears in both targets after severe plastic deformation of impact. The effect of composite on micro-hardness of target is greater than that of W alloy, and the thickness with high micro-hardness around target crater formed by composite penetrator is 2.5 times than that by W alloy penetrator.
Numerical Simulation of Grinding-Hardened Layer's Depth in the Reciprocating Grinding of 45 Steel
Authors: Liu Ju Dong , Yuan Wei , Xu Zhi Long , Yu Dong Ming
Published: September 2013

Based on the experiment of reciprocating grinding and in accordance with Jaeger moving heat source theory and the triangle model of the heat source, this paper established temperature filed of grinding-hardening machine and conducted numerical calculation with the temperature filed of grinding by the software ANSYS. Then it predicated the grinding-hardened layers depth in accordance with the results of numerical calculation, and compared with the experimental results to verify the rationality of the simulation results.
Preparation and Characterization of Polyaniline Nanotubes Doped with Different Acid
Authors: Bai Xue Lian , Mei Jian Ting , Mu Zhong Guo , Bai Yun
Published: September 2013

Polyaniline (PANI) nanotubes were synthesized separately using amino acetic acid (AA), ethylenediamine tetraacetic acid (EDTA), oxalic acid (OA) as dopant and ammonium persulfate (APS) as oxidant by a self-assembly method. SEM, TEM,FTIR and X-ray diffraction (XRD) and applying the 4 probes method characterized the morphology, structure and property of the product. It was found that nanotubes morphology were synthesized when the [Aci/[A ratio is 1:2.The room template conductivity of the products were studied.
Preparation of Nanosized Fe3O4 Powders by Solvothermal Method
Authors: Cui Zhen Feng , Sun De Hui
Published: September 2013

Nanosized Fe3O4 particles were prepared in glycol medium through a solvothermal method and the morphologies, structures, surface properties, and magnetism of the samples were characterized by SEM, XRD, FTIR absorption spectra and VSM. The experimental results show that the nanoparticle has a typical diameter of ca. 20 nm. The Fe3O4 nanoparticle diameters increased with increase of PEG content and PEG molecular weight under the case of other unchanged reaction conditions. The XRD pattern confirms that the Fe3O4 nanoparticles belong to cubic structure. The FTIR results indicate that the surface of the Fe3O4 nanoparticles are coated organic matter. Magnetic investigation reveals that the Fe3O4 nanoparticles have higher saturation magnetization and negligible coercivity at room temperature.
Preparation and Character of Inorganic Polymeric Coagulates from Fly Ash by Activation Method
Authors: Yuan Chun Hua
Published: September 2013

Using the main raw material of fly ash, metal scrap and waste industrial acid, with the activating method of specific self-activator ,can prepare poly-ferric-aluminum-silicate(PFAS) flocculant of inorganic polymeric coagulates. Specific activator can effectively open the Si-Al bond in the fly-ash, greatly enhance the leaching rate of each element by adding a special activator (M), the added amount of M: SiO2 = 1:3, activation time of 1 hour, activation temperature to 900 °C, get the original product, on 65 °C with turbid acid to stir and leach, leaching time is 2 hours, get the best rate of leaching. By Controlling Molar ratio of (Al + Fe) and Si 1:1, Silicic acid polymerization pH 1.7, by choosing the appropriate amounts of flocculants and flocculation time ,can get the very good flocculation function, the light transmission rate of the handling-water may amount to more than 92.7%.
Research on the Hole Shape Distortions Near the Bending Plastic Deformation Area
Authors: Zhang Ling Yun , Huang Ren Chang
Published: September 2013

In this paper, a research work on the hole shape distortion of commercial-purity aluminum plates in the bending process was carried out. The bending process was simulated by using ABAQUS software in order to reveal the phenomenon and law of hole shape distortions near deformation area. A series of bending tests were conducted for the comparison of simulation results. By measuring the hole diameter under different conditions, the factors that affect distortion level were obtained, including hole distance and initial plate thickness. The rationality of this distortion law was proved by finite element simulation. This research provided the plate with a hole of theoretical basis for bending process selection of the most suitable process parameters.
Simulations of Structural Transition of Ti75Al25 under High Pressure
Authors: Xia Jian Hong , Gao Xue Mei , Cheng Zheng Fu , Xiao Xu Yang
Published: September 2013

The structural transitions of the rapidly cooled Ti75Al25 under high pressures were studied by using molecular dynamics simulations. This work gives the structural properties, including the potential energy, pair-correlation function, Honeycutt-Andersen (HA) and Voronoi indices, and temperature dependence. Our results indicated that the liquid Ti75Al25 was frozen into glass state at the temperature about 300 K under different pressures during the same quenching processes. With increasing of pressure, the glass transformation temperature (Tg) become high. The icosahedral and defect icosahedral clusters increase as the temperature decreases under different pressures. But the icosahedral cluster increases with the increasing pressure and defect icosahedral clusters keeps invariability at 300 K.
Based on the Cimatron Plastic Shell Mold Design and Processing
Authors: Guo Qiang
Published: September 2013

The graduation design using CimatronE10 software shell model design, product modelling die, mold cavity, side pumping finish making mould numerical control programming and machining center operation. In mold cavity of the numerical control programming is described, the main analysis and technology essentials of each working procedure, flexible use of the secondary open coarse, increasing the auxiliary surface and other programming skills.
The Application of Raw Dolomite in Converter
Authors: Sun Wei , Li Hai Yang , Kong Yong Jiang , Yang Wen Jun , Peng Qi , Shen Wu
Published: September 2013

The reaction mechanism of raw dolomite was analysed.The test have been implemented.The effect was generalized.The result is: application of raw dolomite in converter can reduce lime 3.3 kg/t,light burning dolomite 7.2 kg/t,coolant7.4 kg/t,decrease cost 9.74¥/t.
Usability Analysis of Diesel Engine Oil Based on Properties of Mineral Materials
Authors: Li Zhan Yu , Meng Fan Sheng , Huang Wen Wei
Published: September 2013

This paper makes a brief discussion on the selection basis of the engine oil and introduce the engine oil`s properties of mineral materials. With different engine types, the required engine oil performances may vary greatly; According to the test indications of coachs engine oil, the reasonably set change interval can make the best use of the engine oil.
Effect of Sample Width on Characteristics of Flame Spread across Eucalyptus Wood Surface
Authors: Wu Gui Hong , Wu Yi Qiang , Hu Yun Chu , Zhu Xiao Dan
Published: September 2013

To study the effect of sample width on flame spread characteristics, a series of laboratory-scale experiments were conducted employing eucalyptus wood with width from 3 to 7 cm. Flame dimension, flame spread rate and mass loss rate were obtained. The relationship between these flame spread characteristics and sample width was explored. Both the dimensionless average flame height and depth vary as the-n power of sample width. With the increase of sample width, both the flame spread rate and mass loss rate first decrease and then rise. The minimum values appear when sample width measures 6 cm.
Electrocatalysis and Sensitive Determination of Sudan I at Fe3O4/Graphene Modified Glassy Carbon Electrodes
Authors: Luo Su Xing , Wu Yuan Hui , Gou Hua
Published: September 2013

The iron oxide/graphene (Fe3O4/rGO) nanocomposite modified electrode and the electrochemical properties of Sudan I were investigated. It was found the anodic peak current of Sudan I was linear with the concentration of Sudan I from 0.008 μM to 6 μM with a detection limit of 0.0005 μM (S/N=3). The regression equation was: Ipa (μA)=-0.8151-0.9651c (μM), R=0.9934. It was convenient and excellent sensitive electrochemical method for Sudan I determination. This electrochemical method was successfully applied to determine Sudan I in food samples.
Experimental Study on Microhardness and Microstructure for 7050-T7451 Aluminum Alloy of High Speed Milling
Authors: Zhong Zhao Lin , Ai Xing
Published: September 2013

Determination of the surface integrity is of particular importance because of its influence on workpiece service life. The microstructure of 7050-T7451 aluminum alloy under the cutting speed of 3000~5000m/min was observed in this paper. With the increase of cutting speed, microhardness was analyzed to investigate the thermal softening phenomenon engendered, which would affect the surface performance in return. According to the results, influences of cutting speed on microstruceture and microhardness in high speed were explored and further research on temperature in high speed is suggested.
Fast Synthesis of Ag3PO4 Cube Microcrystals and its High Visible-Light-Driven Photocatalytic Activities
Authors: Guo Li , Yue Lin Lin , Wang Dan Jun , Fu Feng
Published: September 2013

Ag3PO4 photocatalyst was successfully synthesized via a aqueous precipitation process using AgNO3, NH3·H2O and NH4H2PO4 as raw materials, and characterized by X-ray diffraction (XRD),solid-UV-Vis and FE-SEM techniques. Photodegradation of Methylene blue solution,Rhodamine B,was studied with Ag3PO4 under experiment light recourse of metal halide lamp . The XRD result showed that the sample Ag3PO4 synthesized in a high purity belongs to tetragonal. And the sample has a strong absorption between 200 nm and 400 nm analysized by UV-Vis. The photodegradation experiment showed that Methylene blue solutionRhodamine B was more easily photodegradated with Ag3PO4 and light recourse was metal halide lamp.
Research on Mechanical Properties of High Boron Alloyed Stainless Steel Composite Plate Containing Titanium
Authors: Yuan Lin Lin , Han Jing Tao , Liu Jing , Liu Yan Long
Published: September 2013

High boron alloyed stainless steel composite plates with different Ti content by cladding casting and hot forming process were fabricated. The mechanical properties of composite plates were analyzed after solution treatment. The results show that the composite plate has optimal microstructure and properties at 1100°C solution temperature, holding for 4h.The comprehensive properties of the composite plates are improved with the increase of Ti content, but excess Ti content can lower the plasticity. The elongation and the tensile strength of composite plate reaches 29% and 527MPa respectively, the mechanical properties can meet and exceed the supply standard requirements in ASTM A887-89 of U.S. when the reasonable content of Titanium is about 5%.
CAD/CAE Integration System of the Excavator Boom
Authors: Zhu Kun , Yin Xu , Ji Ai Min
Published: September 2013

According to the existing problems in the design of the excavator working devices boom, the method of integrated design and analysis for the boom was put forward by CAD/CAE integration technology. Firstly, design ideas of database in CAD/CAE integration system was given, so the data of model can be transmitted and exchanged effectively between CAD and CAE systems. Secondly, the parametric model of the boom was established based on parametric method. Thirdly, the customization analysis platform of the boom is built with customization technology and secondary development of ANSYS Workbench code. Finally, the parametric design and automatic finite element analysis for the excavator boom were implemented.
Studies on Temperature Dependent Ionic Liquid Solid-Liquid Extraction Behavior of Rare Earth
Authors: Pan Zhong Wei , Weng Wen Ting , Yan Hui Bing , Yu Yu Li , Wu Tian Ci , Pan Jing Ding
Published: September 2013

Temperature dependent solid-liquid extraction behavior of eight rare earth elements (REs) was investigated using N-butyl pyridinium hexafluorophosphate ([BPPF6) as an ionic liquid solvent and 8-hydroxyquinoline (HQ) as an extractant at 80 °C. Parameters including the amount of [BPPF6, HQ concentration, extraction time, extraction temperature and pH were investigated and optimized. The extracted species was neutral REQ3 in the RE3+-[BPPF6-HQ solid-liquid extraction system. The extraction percentage of RE3+ could be higher than 99%. The recovery of RE3+ extracted into [BPPF6 can be achieved using the mixture of hydrazine hydrate and ethylenediamine tetraacetic acid as stripping agents. The extraction equilibrium constants and the pH1/2 values of eight REs and their separation factors between adjacent rare earths were estimated and comparatively studied. REs were extracted into solid ionic liquid phase with smaller volume and concentrated to some extent. Furthermore the temperature dependent solid-liquid extraction allows to recover [BPPF6 after the extraction procedures. These results indicate that the proposed procedure can be used for the preconcentration and separation of REs using [BPPF6 with high melting point.
Synthesis and Electron Trapping Luminescence Property of SrSO4:Eu2+ Phosphor by a Hydrothermal Process
Authors: Sun Jia Yue , Sun Guang Chao , Cui Dian Peng , Xue Bing
Published: September 2013

Electron trapping materials SrSO4:Eu2+ were prepared by hydrothermal method at 200 °C for 20 h. The phase structure, microstructure and optical properties were characterized by XRD, SEM, EDAX, PL, PSL and TL, respectively. The sample was stimulated by a 980 nm infrared laser after exposing to the UV light. It can be seen that the PSL emission spectra had two bands with peaks at 793 nm and 835 nm, and the photo stimulated luminescence phenomenon was observed.
Modeling the Phonon Transport in Nanowire with Different Cross-Section
Authors: Su Gao Hui , Yang Zi Chun , Sun Feng Rui
Published: September 2013

The phonon transport in silicon nanowire was simulated by Monte Carlo Method (MCM). The effect on the phonon transport of the boundary reflection mode, cross-section size and cross-section shape was studied. Analysis shows that diffuse reflection can result in phonon accumulation at the circumferential boundary. As the cross-section size decrease, the nonuniformity of the temperature distribution within the cross-section becomes more severe. When the area of the square cross-section silicon nanowire (SCSN) is equal to that of the circular cross-section silicon nanowire (CCSN), the thermal conductivity of them is more close to each other.
Simulation and Experiment of Temperature Field in Catalytic Combustion Furnace of Natural Gas
Authors: Yan Long Fei , Zhang Shi Hong
Published: September 2013

The physical model of natural gas catalytic combustion furnaces was established, furnace was simulated using ANSYS software, and verifying the validity of the simulation through the experimental test data. Simulation results and test results were analyzed, concluding that law of internal temperature field in furnace, to provide a reference for the next application of furnace
Solving Task of Multi-Intelligence Agents on Energy Model with Spline Finite Strip Method in Cold Forming
Authors: Zhang Jun Cai
Published: September 2013

Spline finite strip method is the basic theory to analyze the cold-bending formation. Based on principle of virtual work by spline finite strip method, energy model of strip element was established. The qualitative forming factors which are difficult to quantify, and the constraint conditions to form model were given into information description. Combing with specialist experience, solving task system of multi-Agent was established. By amending the Agent of knowledge containers and social relationships, every random factor influencing on forming quality effected objectively in the multi-Agent systems based on the changing environment. Then, the formation of dynamic task is solved. This work can provide theoretical guidance for complex design of steel in roll pass.
Study on Weld Seam Modeling for Remote Welding
Authors: Gao Sheng , Wang Yu
Published: September 2013

This paper studies the dynamic modeling of weld seam by using the laser vision sensor in virtual environment (VE). By introducing virtual guide (VG), lowering operative difficulty and showing high security can be obtained. Template matching is used to recognize remote weld seam, and the uniform contour of V is defined to represent the features of remote seam. Cubic spline interpolation is employed to construct the continuous model of the seam.
The Optimizing Processes and Integrated System Structure of the Pipe Fitting
Authors: Xu Yan , Yuan You Xin , Chen Jing , Long Xiao Bin , Wang Lu
Published: September 2013

The current pipe fitting forming process is characterized by more than one equipment and gradually formation processes, it is high misinformation, low performance, and poor versatile inferior. Therefore, an automatic integrated system about the pipe cutting, the pipe bending, the molding pipe end and the discharging is presented in this paper. The integrated system can realize the integrated numerical control, willfully combine the whole processes, and enhance the process quality. The following works have been done: design the processes schematic, optimize the integrated pipe processes, and design the integration process system structure. The research lays the rationale for the development of the integration process numerical control equipment.
Key Protective Techniques Study for Strain Gauges in the Oil-Water Mixture and Pressurization Environment
Authors: Zuo Jia , Zhang Jian Feng , Teng Shen Ke
Published: September 2013

In order to improve the survival rate of the strain gauges in the oil-water mixture and pressurization environment in the static/fatigue test of aircraft fuel tank, some key installing and protecting techniques were researched. The protective performance of single and double covering with Different protective agents, the various treatment scopes on the specimen and different lengths of lead wire embedded in the protective coating were investigated in a fuel tank which was designed and manufactured specially for the contrast test. Several effective protective techniques are gained, and when these techniques are applied to the practice, a satisfactory survival rate of strain gauges is reached.
Preparation Optimization Design of Tennis Ball Adhesive Formula
Authors: Cai Yun Tao , Shi Bo Qiang
Published: September 2013

The tennis ball adhesive formula is optimized by studying the impact of reinforcing system, tackifier, vulcanization system and solvent on the performance of NR-based tennis ball adhesive. The optimizing formula of rubber is: NR 100, Carbon Black N220 30, ZnO 8.3, Stearic Acid 2.2, Phenolic Tackifying Resin 3, Sulfur 3, Accelerator D0.5.The adhesive made through such optimizing formula shows good performance and the finished tennis ball has excellent adhesion and air tightness, satisfying the design requirements.
The Numerical Simulation Analysis of the Rectangular Box Straight Springback Law
Authors: Zhang Ling Yun , Xie Song
Published: September 2013

Abstract. Springback is one of the main factors that affects the quality of sheet metal deep drawing. Due to the springback is inevitable, so to explore the springback law becomes an important content in the process of sheet metal forming. In this paper, the ETA/DYNAFORM finite element software was applied to simulate four different length-width radio model of rectangular box. The simulating data shows that the rectangular box with short straight edge rebounded inward when the central of the long straight edge rebounded outward and near the corner part rebounded inward. The study had a very important guiding significance to the stamping process of rectangular box part and mold design.
A New Tracking System Overall Structure Designed Based on Laser Scanning
Authors: Zhang Qiao , Cao Guo Hua
Published: September 2013

Design the overall framework of a tracking system based on laser scanning . The system uses a two-dimensional scanning galvanometer agencies to complete scanning, uses the computer as the central control unit to process scanning the returned signal and control the whole system. Control system uses hierarchical ideology, with predictive control and PID control combination.
An Analysis of the Effects on Calibration Parameters of FDR for Moisture Sensor Caused by Different Kinds of Soils
Authors: Chen Hai Bo , Ye Lin Mao , Shi Li Kui
Published: September 2013

With the method of artificial soil columns, several kinds of soil, such as, loam, clay, and sandy soil were used for FDR (frequency domain reflectometry) moisture sensor calibration experiment. Then, these data showed that the frequency of soil moisture sensor is monotone decreasing with the increase of soil volumetric water content, so the correlation is obvious. Different kinds of soil affected moisture sensor parameter remarkably. A better result would be obtained in classification calibration than that in concentration calibration. This experimental result had a great meaning for fine calibration of soil water automatic detector in the areas with complex kinds of soil.
Investigation of Tool Life in Turning of AISI D6 Steel
Authors: Parlak Nihat , Ozler Latif , Dogru Nulifer
Published: September 2013

In this study, AISI D6 cold work tool steel was machined on lathe by using the CBN tools. AISI D6 work pieces hardness before heat treatment was 22 HRc. Heat treatments were implemented to the work piece at 860-880°C for 40 minutes and it was cooled in oil. In addition the work piece was applied tempering procedure for three times at intervals of 3 hours. The hardness of the work piece after heat treatment was 62 HRc. Experiments were conducted under different depth of cuts, cutting speeds and feed rates by using factorial experimental design on a lathe. The cutting speed of 50, 100 and 150, feed rate of 0.1, 0.15 and 0.2 mm/rev, depth of cut of 0.2, 0.4 and 0.6 125 mm were chosen as the experimental conditions. According to the obtained experimental, it was seen that when the cutting speed, feed rate and depth of cut increases and tool life decreases fast.
Preparation of TiO2/ACF in Caprolactam Tetrabutyl Ammonium Bromide Ionic Liquid
Authors: Han Jing
Published: September 2013

To explore environmentally benign method for preparing TiO2, composite photocatalysts TiO2 immobilized on activated carbon fibers (TiO2/ACF) were prepared in caprolactam tetrabutyl ammonium bromide ionic liquid (CPL-TBAB ILs). The TiO2/ACF composites were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The effects of different preparation condition were discussed by degradation of methyl orange (MO). The results showed that nanoTiO2 particles of mixed grain phase were well deposited on the activated carbon fiber surface. 96% of MO was removed under optimal preparation conditions.
Research and Application of Special Vehicle Design Based on the FMEA
Authors: Feng Qing , Wu Xian , Luo Jie , Qi Bin
Published: September 2013

FMEA(Failure Mode and Effects Analysis) for the tank truck tail bumper design is systematically performed. The results reveal that FMEA plays a significant role in the early stage of design to identify the weak links, and its considerably potential in improving the reliability of the product and the subsequent repair and maintenance procedure. In the process of new product development, the implement of FMEA tend to be increasingly intensive and completed, which provides a qualified guarantee for the industrialization of the new product.
Stability Analysis of Elastic Vibration of Flexible Manipulator Arm Based on Routh Criterion
Authors: Chen Yuan , Liu Guang Rui , Wu Wen Jing
Published: September 2013

dynamic model of flexible manipulator arm having end position addition mass is deduced in the first place in this paper , then the state space expression and transfer function using drive moment as input and using elastic vibration of end position as output of flexible manipulator arm are obtained . the necessary and sufficient condition assuring stability of flexible manipulator arm system is obtained using Routh criterion , and the stability criterion of the elastic motion of end position is deduced . the influence of end position addition mass and drive joint rotary inertia on the elastic motion stability of end position of manipulator arm is analyzed based on the stability criterion .
Dynamic Characteristics of a Gantry Milling Machine under the Influence of Linear Guide Preload
Authors: Hung Jui Pin , Lai Yuan Lung , Chen Yong Run
Published: September 2013

This study was aimed to investigate the influence of the linear guide configuration on the dynamic characteristics of a gantry milling machine. To predict the dynamic characteristics, we created the finite element model of the gantry machine, in which linear components were also included and modeled with the introduction of the contact stiffness defined by Hertz contact theory. Using this model, the vibration modes dominating the dynamic stiffness were determined. The results of the finite element simulations reveal that the linear guides with different preloads greatly affect the dynamic responses of the spindle tool. These results were validated by performing vibration tests on the milling machine prototype. Comparisons of the predicted results and experimental data show good agreements between them. According to the analysis results, the maximum dynamic compliance can be increased by 33% in X-axis direction and decreased by 18% in Y-axis direction, respectively when the linear guides are changed from low to high preload. Overall, current results clearly suggest that the proposed gantry model can be used to evaluate how the specification of the linear components can affect the machining performance of the milling machine.
Specifics of Microstructure and Phase Composition of High-Speed Steel R6M5
Authors: Skakov Маzhyn , Rakhadilov Bauyrzhan , Karipbayeva Gaukhar
Published: September 2013

In this paper microstructure, morphology, elemental composition, phase composition and crystal structure of the sample steel R6M5 were investigate by using the methods of scanning electron microscopy, electron backscatter diffraction (EBSD) analysis and X-ray diffraction (XRD) analysis. Determined that the microstructure of steel R6M5 after hardening and three-time tempering consists of tempered martensite and solid carbide M6C and MC-type with spherical shape and a diameter of less than 3 μm. Detected that the volume fraction of each carbide amounted to 10.4±0.6% and 2.3±0.4% - for grey and bright carbides, respectively, and that the sizes of bright carbides particles in the microstructure of steel R6M5 are 0.4-4,5 μm, and the sizes of grey carbides particles are 0.5-1.1 μm. XRD analysis showed that the main carbides in the studied steel are carbides М6С and MC, which have complicated the FCC crystal lattice and the Fd3m spatial group. Determined that carbides are uniform and monocrystalline. ESBD analysis with the support of the XRD analysis showed that carbides spherical shape М6С fit to Fe3W3C composition.