bluuebunny/crossref_metadata_2025 huggingface dataset:
The Optimization and Countermeasures Research of Agricultural Products Quality and Safety Supervision Mode
Authors: Xi Wei Dong , Qiao Qi , Sun Shao Fang
Published: December 2014

This article is aimed at dealing with the situation of frequent incidents of agricultural products quality and safety and the regulatory model which is only concerned about the post-supervision in China, defining the regulatory model of quality and safety of agricultural products, describing and analyzing the present mode of agricultural products quality and safety supervision by using the loop model, and identifying the drawback that the target of supervision is wrong and the defects of current regulatory which is mainly for regulation after security incidents but ignore the risk control before incidents in the existing agricultural products quality and safety supervision mode. Accordingly, I want to improve the supervision mode, propose appropriately scientific measures to combine the supervision mode and with status and build a more perfect mode that match the present situation of quality and safety of agricultural products.
Enterprise Document Management Module’s Design and Implementation Based on Workflow Technology
Authors: Chen Yin Feng
Published: December 2014

With the acceleration of enterprise information, office automation system had already become an important content of enterprise modernization. Enterprises realized office automation which could optimize management organization, increase coordination office ability and increase the efficiency of the enterprise's decision-making. The paper was based on the workflow technology to carry on the document management module’s design and implementation in the enterprise office automation in order to achieve the enterprise document automatic functions of approval.
Growth of GaN Film on Graphene by HVPE
Authors: He Shun Yu , Cao Bing , Yu Qiang , Qi Lin , Wang Chin Hua , Xu Yu , Zhang Ji Cai , Sun Qian
Published: December 2014

A method to grow gallium nitride (GaN) films directly on the graphene layers by hydride vapor phase epitaxy (HVPE) method is reported in this work. We used a chemical vapor deposition (CVD) method to grow graphene on a copper foil, and the test results showed the presence of monolayer graphene at most regions. GaN films were grown on the graphene/MO-GaN substrate (GaN which was grown by metal organic vapor phase deposition) and MO-GaN template by HVPE method. Raman Spectroscopy, Scanning Electron Microscopy (SEM), and X-Ray Diffraction (XRD) were adopted for characterization. By comparing with the MO-GaN substrate, the crystalline quality of the GaN films were both increased. However, the crystalline quality of the HVPE-GaN with graphene interlayer is slightly lower than that directly grown on MO-GaN.
Effects of Substrate Temperature on the Properties of Cu(In,Ga)Se2 Thin Films Prepared by Sputtering from a Quaternary Target
Authors: Yang Zi Yue , Wang Li Dong , Song Rui Xuan , Zhang Dong Xing , Fei Wei Dong
Published: December 2014

Cu (In,Ga)Se2 (CIGS) thin films were prepared by direct magnetron sputtering CIGS quaternary target at the substrate temperature varying from room temperature (RT) to 300 °C. The effects of substrate temperature on the structural and electrical properties of CIGS films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) and Hall effect measurement. The CIGS thin films with a chalcopyrite structure were obtained between 100 and 300 °C and the crystallinity of films were enhanced with the increase of the substrate temperature from 100 to 300 °C. The film compositions were consisted with the target when the substrate temperatures were between RT and 200 °C, however, it deviated from the stoichiometry of the target when the substrate temperature was 300 °C. The CIGS films deposited at 200 °C had the higher carrier mobility of 3.522 cm2/Vs.
Angelica keiskei Chalcone and its Effect on Microvessel Density and VEGF Expression of Mice Hepatocarcinoma Cells
Authors: Li Zi Chao , Li Xiao Wen , Wang Jian Ping , Zhong Jin Yi
Published: December 2014

To study the effect of Angelica keiskei chalcone (AC) on microvessel density (MVD) and vascular endothelial growth factor (VEGF) expression on mice hepatocarcinoma cells. Fifty mice were inoculated with hepatocarcinoma H22 cells and divided into 5 groups. Group one to three were administered orally with AC by 5, 25 and 50 mg/kg/d, respectively. Group four was given Endostar 4mg/kg/d by intraperitoneal injection and tumor control group (group five) was given with normal saline. All mice were sacrificed after 10 days. The proliferation activity of hepatocarcinoma cells was determined by methy tetrazolium (MTT) assay, and the levels of the MVD and VEGF protein expression were detected by immunohistochemistry method. The AC inhibitory rates for tumor size were 4.20%, 30.47% and 39.42% at AC treatment dose of 5, 25, and 50 mg/kg, respectively. The average MVD count was 14.2, 11.2 and 8.5 at treatment dose of 5 mg/kg, 25 mg/kg and 50 mg/kg AC, respectively. The protein levels of VEGF in mice treated with 25 mg/kg and 50 mg/kg AC were significantly decreased. The results showed that AC could inhibit tumor angiogenesis effectively and the inhibition mechanism might be associated with the down-regulation of VEGF.
Study on Hydrophilic Modification of Acrylic Yarn
Authors: Wang Yin , Liu Zheng Qin , Liu Kai Qiang , Zhang Cui Ping , Wang Qiu Mei
Published: December 2014

In order to improve the moisture absorption of the acrylic yarn, the acrylic yarn was firstly hydrolyzed in the caustic soda (NaOH) solution to convert the cyano group molecular into hydrophilic group, then the reticulated coatings was formed on fiber surface by chemical crosslink. Furthermore, the effect of the acrylic hydrolysis temperature, NaOH dosage, ethanol, cross-linking agent (CLA) on acrylic affinity for moisture was discussed through the contrast experiments. The best experimental conditions were investigated by the orthogonal experiments, and the optimum process parameters were obtained. The results indicate that under the condition of NaOH concentration of 6%, hydrolysis time of 15 min, temperature of 80°C, and cross-linking agent concentration of 0.09% on weight the yarn (owf), the moisture regain of modified acrylic yarn has increased by 245.4% as compared with that of untreated acrylic yarn and the water absorption has been improved greatly.
Damage Identification of Low Carbon Steel under Tensile Based on Elastic Modulus
Authors: Xue Yu Jun , Liu Shuang Shuang , Li Ji Shun , Yang Fang
Published: December 2014

Tensile test of low carbon steel was carried out on a universal electronic testing machine. Loading and strain test data of low carbon steel was acquired by means of the tensile test. Based on the measured tensile specimen data, elastic modulus of low carbon steel was calculated. It was found that elastic modulus of low carbon steel varied during tensile process. The damage of low carbon steel under tensile was identified by the calculation of elastic modulus.
The Band Structures of Chemisorptions on Si (100) Surface
Authors: Wu Jun Fang
Published: December 2014

The band structures were given by study on the chemisorptions of atom on the Si (100) surface. From these curves, the pseudogap, forbidden bandwidth, the trend of Fermi level in the graphics at the Fermi level were analyzed and compared for different elements absorption. The conclusion is that the electrical conductivity of Cu, Na is the best, followed by C, the last is the Si.
The Density of States for Chemisorptions on Si (111) Surface
Authors: Wu Jun Fang
Published: December 2014

The density of states was given for the chemisorptions of atom on the Si (111) surface. From these curves, the characteristics, such as the pseudogap, forbidden bandwidth, energy curve, the trend of Fermi level in the graphics and the density of states at the Fermi level and so on, were analyzed and compared to for different elements absorption on the Si (111) surface. The density of states for chemisorptions is different for the different elements.
Preparation of Cerium Hydroxide by Green Synthesis and Characterization
Authors: Hu Zhen , Yu Hai Lian
Published: December 2014

Cerium hydroxide was prepared with Cerium carbonate by green synthesis. The products were characterized by several analytical methods. Fourier transform infrared spectroscopy was used to determine whether the product was Cerium hydroxide. X-ray technique was used to study the phase composition. DSC-TG was used to study its thermal stability. X-ray fluorescence spectrometer was used to study its content and impurity. The results show that the prepared product is Cerium hydroxide, and made of Cerium hydroxide mainly, its content of impurity is 0.94%, and there are traces of water in the powder. It is a kind of amorphous structure, has good thermal stability when the temperature was exceeded 480°C.
Determination of Experimental Conditions of Preparation of Zeolites from Fly Ashes via Alkaline Fusion Followed by Hydrothermal Crystallization
Authors: Chen Yun Xia , Wan Cheng , Su Xiao Li , Zeng Tao , Rao Si Yang
Published: December 2014

In this study, we converted high silicon fly ashes (FA) to zeolites using a two stages conversion process: alkaline fusion followed by hydrothermal crystallization. The orthogonal experimental method was applied to design the experimental variables of alkaline fusing and hydrothermal crystallizing procedure. Alkaline fusion prior to hydrothermal synthesis was applied to collapse the FA crystalline phases and release Si content. Different from most of the research, the mixtures of NaOH and Na2CO3 were used to increase the fusion temperature in order to remove the residue carbon simultaneously. Acid solubility was used to evaluate the efficiency of alkaline fusion. Then the optimized alkali-fused FA was resolved in the NaOH solutions and the experiment conditions were designed by the orthogonal experimental method. XRD and SEM were employed to characterize the crystalline phases and microimages of the raw FA and the treated FA. Adsorption process of methylene blue was applied to simulate the adsorption ability of the fly ash zeolites. Finally, the optimized conditions of alkaline fusion and hydrothermal treatment were concluded.
Raising Lipid Content Improve Moisture Barrier of Soybean Protein-Isolation/Carboxymethyl Cellulose Composite Films
Authors: Zhang Chao , Guo Xiao Fei , Ma Yue , Zhao Xiao Yan
Published: December 2014

Three lipids (beeswax, palmitic acid and stearic acid) and a hydrophilic film (soybean protein-isolate/carboxymethyl cellulose film) were selected as a model to inspect the relation between the lipid state and barrier properties. The free-lipid ratio of composite films was the best indicator for the transparency rather than the moisture barrier. The free-lipid content/total-lipid content had the highest negative correlation factor with the moisture barrier. Hence, raising free-lipid ratio was effective to improve the moisture barrier of hydrophilic films.
Optimized Preparation of Capsaicin-Loaded Nanoparticles Gel by Box-Behnken Design
Authors: Tang Mei Ling , Chen Li Hua , Zhou Dong Sheng , Zhu Wei Feng , Guan Yong Mei , Li Jun Song
Published: December 2014

A three-factor three-level Box-Behnken design(BBD) was employed to optimize capsaicin-loaded nanoparticles(Cap-NPs), and its properties in vitro and in vivo were evaluated. Particle size, morphological characteristics, entrapment efficiency of Cap-NPs were investigated respectively by Zetasizer, H7000 TEM and HPLC. Release, skin permeation and skin irritation test were investigated on mouse and rabbits. The predicted values of Cap-NPs were 94.50±6.33% for entrapment efficiency(EE) and 170.30±7.81 nm for particle mean diameter(PMD) under optimal conditions which were 346.33 bar (homogenization pressure, X1), 4.67 min(homogenization time, X2), and 15421.42 rpm (shear rate, X3). The in vitro permeation study showed that capsaicin permeability in NPs-gel was a 2.80-fold greater flux values than conventional ointment after 24 h. Cap-NPs-gel produce no observable skin irritation in rabbits within 72h. The optimized Cap-NPs-gel would be a good candidate for transdermal delivery.
Research on Large Partical Size and Porous Rubber Modified Asphalt Mixture Repairing Techniques Used in “White and Black” Pavement
Authors: Yao Zhong Ping , Chen Zhen Bei , Zhang Gong Liang , Li Meng
Published: December 2014

The paper Introduces the structure composition and performance characteristics of the large partical size and porous rubber modified asphalt mixture, analyses the road performance of mixtures, on the basis of the characteristics of higher proportion of coarse aggregate and poriness, puts forward the practical and feasible construction scheme. It will be a beneficial exploration for the development and application of the large partical size and porous rubber modified asphalt mixture in the "white and black" pavement structure.
The Application of Paper Material in Transition Building after an Earthquake
Authors: Liu Ning Bo , Jiang Li Yong , Li Zhen , Huang Shuai
Published: December 2014

Paper material has many excellent characteristics in architectural applications. Our main constructions for disaster rescue are temporary tents, board house and so on for a long time, so it is difficult to meet the psychological demands of the people in disaster area. According to Maslow's hierarchy theory of psychological demands, this paper analyzes people’s demands of physiology, psychology and social aspects in disaster areas, also sums up the exploration of paper material in architectural application, and finally summarizes that paper material is economy, flexible, safety, sustainable and so on.
Numerical Analysis of Multi-Layer on the Stress Distribution in Adhesively Bonded Single Lap Aluminum Joint
Authors: You Min , Zhao Ya Lan , Li Jian Li , Li Ying Ying
Published: December 2014

The effect of dual adhesives to form multi-layer on the stress distributed in adhesively bonded single lap aluminum joint was investigated using elasto-plastic finite element method (FEM). The results from the numerical simulation showed that the values of the peak stress along the bondline are influenced evidently when there is a multi-layer formed by a middle layer with higher elastic modulus adhesive and two layers with lower elastic modulus adhesive.
Influence of Imidazoline Inhibitor on CO2 Corrosion of N80 Steel in Annulus Zone of Pump Recovery Well
Authors: Hou Zhen Bo , Li Tian Hao , Lv Xian Wei , Fu Bing Ge
Published: December 2014

The impact of CO2 partial pressure ,fluid producing rate and corrosive medium on the CO2 corrosion regularity of N80 steel and the inhibition efficiency of imidazoline inhibitor are investigated respectively through simulation of the actual working environment in the mined-out space of mechanical oil production wells by using high temperature and pressure reactor. According to the results, the corrosion rate of metals increases with CO2 partial pressure but the inhibition efficiency of the inhibitor is hardly affected when CO2 partial pressure in the scope of 1~3MPa. The increase of the fluid producing rate will accelerate the corrosion of metals and the inhibition efficiency will decline. With corrosion inhibitor applied, metals corrode slower in the liquid phase than in the gas in the initial stage, but latterly the corrosion rate is gradually higher than that in the gas phase.
Recovery of Ti-6Al-4V Alloy Scrap by Hydrogenation and Hydride Sintering
Authors: Pan Long , Wang Chun Ming , Chen Yun Gui , Xiao Su Fen
Published: December 2014

The research of recycling Ti-6Al-4V alloy industry scrap is conducting by hydrogenation and hydride sintering process. The Ti-6Al-4V alloy scrap was submitted to a activation treatment under vacuum atmosphere and hydrogenation process under pure H2 gas, the hydrogenated product was attained. Sintering process used hydrogenated titanium alloy powder as a feedstock material. The oxygen content of raw scrap, hydrogenated Ti-6Al-4V alloy powder and as-sintered Ti-6Al-4V alloy was 0.107%, 0.256% and 0.117%, respectively. Compression and Vickers hardness tests were conducted on the as-received and as-sintered Ti-6Al-4V alloy to evaluate their mechanical properties.
Finite Element Analysis of Thin Strip Profile in Asymmetric Cold Rolling Considering Work Roll Crossing and Shifting
Authors: Aljabri Abdulrahman , Jiang Zheng Yi , Wei Dong Bin
Published: December 2014

Cold rolled thin strip has received a great deal of attention through technological and theoretical progress in the rolling process, as well as from researchers who have focused on some essential parameters of strip such as its shape and profile. This paper describes the development of a 3-D finite element model of the shape of thin strip during cold rolling to simulate the cold rolling of WCS (work roll crossing and shifting) in asymmetric rolling. This finite element model considers the asymmetrical rolling parameters such as variations in the diameters of the rolls and the crossing angle as the work roll shifts on the strip during cold rolling. The shape and profile of the strip are discussed in the asymmetrical and symmetrical rolling conditions, while the total rolling force and distribution of stress are discussed in the case where the roll cross angle and axial shifting roll changes. The results can then be used to control the shape and profile of thin strip during rolling.
The Expansion Forming Parameters of the Expandable Tubular Material
Authors: Shen Wen Zhu , Yang Yang , Li Chun Fu , Yang Wei Xiang , Jin Xing
Published: December 2014

Expandable tubing technology got great development in the past few years because of its extensive usages. Expandable material must has such properties as lower yield strength, higher tensile strength, better plasticity and strain hardening properties, and so on. This paper introduced some expansion forming parameters. These expansion forming parameters can be used to characterize the expansion properties.
The Mechanic Properties of Thermoplastic Polyurethanes Elastomer Foam Molded Using Supercritical Fluid
Authors: Wang Jian Kang , Xia Ting
Published: December 2014

Thermoplastic polyurethanes elastomer (TPU) was foamed during injection molding. The effects of processing parameters on tensile strength and weight reduction were analyzed using Orthogonal Experimental Design. The results show that the effects of shot size on the tensile strength and weight reduction are largest, and melt temperature is the key factor on the ratio tensile strength to weight.
Wear and Morphology Investigation of Cr/WC-Ni Based Composite Coating by Laser Cladding
Authors: Dong Zhi Hong , Fan Hong Yuan
Published: December 2014

Cr/WC-Ni composite coating was prepared on Cr12MoV die steel by thermal spray technique, and then further treated using laser cladding technique. WC powders was coated Cr by D.C. magnetron sputtering method. The structure, composition, hardness, morphology were analyzed and measured by XRD and SEM and hardness tester. Tribological experiments were carried out on an abrasion machine. The results showed thatCr film prevented WC decomposition, and Cr/WC-Ni coating had the higher hardness values compared with WC-Ni coating. After the treatment with the laser cladding, the coating surface was uniform and compact and had no cracks, the boding between the matrix and coating surface had a good metallurgical bonding, and sub-surface showed a higher hardness.
Energy Concept of Hardness by the Kinetic Sphere Indentation
Authors: Ogar Petr M. , Tarasov V.A. , Gorokhov D.B.
Published: December 2014

Energy hardness is defined as energy density of material’s plastic displacement from the initial surface level. It is convenient to determine it from the kinetic indentation diagram constructed in coordinates P - h, where P is the relative load, h is the relative penetration of a spherical indenter. With that the relative energy density is equal P/h multiplied by the parameter Cp(h) , where varies within a range narrow for the constructional materials. The relative error of the energy hardness determination by this approach does not exceed 5%.
Analysis of New Heat Exchanger Performance in Phase Change Energy Storage
Authors: Qiu Yu , Luo Xi , Yu Qiong Fen , Xu Yong Feng , Leng Cong Bin , Li Ming
Published: December 2014

Based on traditional shell-and-tubeheat exchanger, a new heat exchanger which applies to phase change thermal storage was proposed. The thermal storage process of new heat exchanger and shell-and-tube heat exchanger which use paraffin as phase change material and use water as heat-transfer fluid can be simulated by CFD software, respectively. The changes of liquid fraction and heat flux density along with time have been got by computer stimulation. It can be found that maximum heat flux of the new heat exchanger heating wall is 2.5 times than shell-and-tube heat exchanger, melting time of the new heat exchanger is 5 times than shell-and-tube heat exchanger. From the two aspects, the heat storage effect of new heat exchanger is better than conventional concentric tube heat exchanger.
Numerical Calculation and Analysis of Water-Lubricated Stern Bearing Considering Elastic Hydrodynamic
Authors: Liu Gang
Published: December 2014

The deformation of marine water-lubricated stern bearing which the lining materials are polymer materials is much bigger than the bearing built with metal materials. So, in order to improve the calculate accuracy of elastic hydrodynamic, it is necessary to consider the deformation of the lining. Both pressure and thickness distributions of water film which contrasts with the hydrodynamic lubrication are presented by the Reynolds equation, and combining with the elastic deformation of the stern bearing solved by using the finite element method theory. The result shows that the stern bearing water film pressure of elastic hydrodynamic lubrication is lower than that of hydrodynamic lubrication, while the water film thickness is larger.
Novel Multi-Stream Plate Exchanger under High Pressure-Structure and its Design Method
Authors: Qu Yan Peng , Wang Wei Qiang , Liu Yan , Xu Zhi Yong
Published: December 2014

The general characteristic of current plate heat exchangers is first summarized in this paper. A new plate exchanger of multi-stream under high pressure is proposed, which is composed of the plates with opening the gyroidal flow-trough along the radius and the shell, it has some advantages, such as simple structure, high efficiency and available under high pressure. We introduce the structure of the plate, the shell and the slotting types. In addition, the process calculation method of heat-transfer is given and the strength calculation method for the key components of the novel exchanger is also presented. According to the stress analysis to the plate wall with ANSYS software, we have proved the reliability of the calculation method.
Researches on Lifetime Modeling of LED Luminaires
Authors: Li Hua Jing , Nie Lei , Huang Fei , Xiang Wen Jing
Published: December 2014

The temperature and vibration have great influence on the properties and materials of LED luminaires. Therefore, the bi-stress accelerate life testing method under temperature and vibration stress was designed and demonstrated. Based on the large amounts of experimentally obtained data and Arrhenius function, life models of LED luminaires were built rapidly by using mathematical reasoning (least square method and unary linear regression method). The results showed that the method we mentioned can sharply reduce the test life test and the life curve of LED luminaires obey to exponential model.
Design on a Removable Catalyst Muffler
Authors: Huang Qi , Xiang Li , He Ze Long
Published: December 2014

A removable catalyst muffler is designed and applied according to the characteristics of general 125ml motorcycle muffler. It has advantages of convenient disassembling, simpler catalyst replacement and low cost of installation and maintenance.
Multi-Dimensional Assembly Process Data Management Method Based on Workflow
Authors: Ruan Si Jie , Liu Jian Hua , Zhuang Cun Bo
Published: December 2014

To solve the problem of difficult process data management caused by the unstable process in complex products assembly, by introducing the workflow technology, a method of multi-dimensional assembly process data management based on workflow was proposed. The evolution model of assembly process information was established from the perspectives of granularity, cycle and version. On this basis, the assembly process information organization model based on workflow was put forward. The detailed description of the management method of process data’s evolution in the perspectives of granularity and cycle was presented. The feasibility of proposed method was proved by actual engineering applications.
Effect of Heat Treatment on Conductivity of Cu-1.0Cr-0.12Zr Alloy
Authors: Qin Yong Qiang , Wu Yu Cheng , Huang Xin Min , Wang Yan , Cui Jie Wu , Hong Yu , Zheng Yu Chun
Published: December 2014

Copper alloys with high strength and high conductivity are a serial of materials with excellent comprehensive performance. However, the strength and the conductivity are a pair of conflicting factors. To resolve this contradiction, Cu-1.0Cr-0.12Zr alloy was studied in this paper. With optical microscope, scanning electron microscope, Brinell hardness and the arms bridge, effects of heat treatment on microstructure and properties of such alloys was studied,and we strived to find a heat treatment processing to achieve the best match between the conductivity and the strength of the alloy. This paper focused on the study of conductive properties of the alloy. The main factor infuencing the conductivity of the alloy was the content of the soluting elements. The higher the content,the lower the conductivity, and vice versa. The results showed that the best comprehensive properties were obtained after solid solution at 920°C and then aging at 450°C for 180 min.
Parallel Machine Scheduling Problem with a Resumable Availability Constraint
Authors: Zhang Qi , Luo Cheng Xin
Published: December 2014

This paper considers a scheduling problem of two parallel machines with a resumable availability constraint. The objective is to minimize the makespan. The problem is NP-hard in the ordinary sense. Therefore, we need to find an approximate solution that fulfills the required error bound. To get a better approximation solution in a polynomial running time, we propose a fully polynomial-time approximation scheme (FPTAS) by trimming states space.
The Research of BDAR under Conditions of Informationalization
Authors: Tu Shan Chao , Gu Xiao Jia , Wang Guo De , Wang Shuai , Qi Bin
Published: December 2014

Effective implementation of BDAR(Battlefield Damage Assessment and Repair) can compensate equipment for battlefield losses, maintain combat effectiveness at the meantime. Under the conditions of modern information warfare, a variety of advanced reconnaissance, detection methods and widely used precision strike weapons, are making the battlefield highly transparent, however,the living environment of weaponry will become very seriously, more brutal battlefield injuries of weaponry will come up simultaneously. Equipment battlefield damage repair is facing new challenges,therefore,the BDAR military equipment which can maintain and enhance the combat capability has great practical significance under conditions of informationalization.
An Adjustable Inertia Balance Support for High-Speed Scanning Probe Microscope
Authors: Yan Gang Yi
Published: December 2014

An adjustable inertia balance support is proposed to counterbalance the inertial force from the actuators for high performance scanning probe microscope. The adjusting method is based on voltage proportion control. In contrast with traditional method that adding or removing mass, it is very convenient to adjust to minimize the inertial force transmitted to the supporting base. It may have a promising application on the current inertia balance support structure, which is used in some high-speed scanning probe microscope. What is more, it has a very good compatibility with current structure.
Vibration Analysis Based on the Mathematical Model of the Air-Suction Device Tillage Seeder Seeding
Authors: Zhang Xu , Zhao Man Quan , Liu Fei , Dong Shuai , Liu Yue Qin
Published: December 2014

In order to study air-suction when tillage planter in the field farming, Vibration due to the surface roughness of the resulting excitation tillage effects on seed planter of the device, Derivation of the air-suction device tillage planter seeder vibration characteristics of the mathematical model, Vibration characteristics of the mathematical model derived gas suction device tillage seeder seed planter primarily by structural properties, Forward speed when operating, Seed row distance between the soil surface, Soil roughness and soil sticky decision. Can predict and analyze working condition tillage planter seed quality through the establishment of the vibration characteristics of the mathematical model.
Flow Field Analysis and Simulation of Tank Cars Based on Secondary Development of FLUENT
Authors: Li Meng Qi , Wang Bin , Li Dong Ying , Li Lei
Published: December 2014

The sloshing fluid inside the tank car which is moving influences importantly on the working of the tank car. The user-defined function second development of the software FLUENT was adopted. The force variation of the tank on the front wall under different working conditions was calculated and the reasons of this variation and the influence on the tank were both analyzed. Little influence on the tank by the sloshing fluid was obtained without energy source. When the tank slowed down, the force peak value remained within the first period of the fluid sloshing, which provided the selection of the tank at the accelerating moment with the foundation.
Effects of Different Sintering Temperature on the Microstructure and Piezoelectric Properties of Pb(Nb2/3Zn1/3)x(Zr52Ti48)1-XO3 Ceramics
Authors: Wu Hong , Zheng De Yi
Published: December 2014

In this paper, the effects of different sintering temperature on the microstructure and piezoelectric properties of Pb(Nb2/3Zn1/3)0.03(Zr52Ti48)0.97O3(PNZZT) ceramic samples were investigated. The Pb(Nb2/3Zn1/3)0.03(Zr52Ti48)0.97O3 ceramics materials was prepared by a conventional mixed oxide method. In the period of the experiment, the relationship between crystallographic phase and microstructure were analyzed by X-ray diffraction(XRD) and scanning electron microscopy(SEM) respectively. The XRD patterns shows that all of the ceramic samples are with a tetragonal perovskite structure. Along with sintering temperature increased and the x is 0.03, the grain size gradually become big. Through this experiment, it has been found that when the x is 0.03 and sintered at 1130°C for 2 h, the grains grow well, the grain-boundary intersection of the sample combined well and the porosity of the ceramics decreased, an excellent comprehensive electrical properties of the Pb(Nb2/3Zn1/3)0.03(Zr52Ti48)0.97O3 samples can be obtained. Its best electrical properties are as follows: dielectric constant (ε) is 1105, dielectric loss(tg) is 0.017, electromechanical coupling coefficient (Kp) is 0.287, piezoelectric constant(d33) is 150PC/N
Characteristic Performance Analysis of Traction Motor on EMU with Broken Bars Using FEM
Authors: Li Yong Xin , Wang Ya Fei , Ge Xing Lai , Lu Yang
Published: December 2014

The calculation model of motor operating on asymmetric rotor was defined taking a traction squirrel-cage induction motor in Electric Multiple Units (EMU) as sample. Based on the basic principle of numerical analysis, magnetic field in the motor and current in the bar were calculated for both normal motor and broken-bar motor by using the Jmag software, and both the magnetic field variation and current variation in the bar were summed up. According to the EMU’s special control methods, the motor with two broken bars was simulated at different work point, and the characteristic component variation was presented. The works in this paper lay the foundation of diagnosis method for broken rotor bar fault, especially for traction motor in EMU.
Fabrication of Pyrochlore Gd2Zr2O7 by High Temperature Solid State Reaction
Authors: Fan Long , Xie Yi , Shu Xiao Yan
Published: December 2014

In order to investigate the fabrication of pyrochlore Gd2Zr2O7, Gd2O3 and ZrO2 were used as raw materials in the process. Pyrochlore Gd2Zr2O7 were fabricated by high temperature solid state reaction at 1100 – 1600 °C under atmospheric pressure for 72 h. XRD and SEM studies were exploited to characterize the crystal structure and microstructure of the synthetic samples. The results revealed that Gd2Zr2O7 with a single pyrochlore structure was fabricated successfully at 1500 °C. The microstructure of the sample was uniform and dense, and the grain size was in the range of 1 - 3 μm.
Simulation and Numerical Analysis of Nondestructive Testing on Weld Cracks by Eddy Current Thermography
Authors: Jiang Lei , Liu Zhi Ping , Liu Xing Le , Lu Ge
Published: December 2014

Eddy current thermography is an emerging non-destructive method for detection and characterization of surface cracks in conductive specimen over a relatively large area. In this paper, the weld crack testing method based on eddy current thermography was proved to be feasible through studying the influence of inductor orientation, excitation frequency and crack length, depth, width on the surface temperature distribution using finite element analysis software COMSOL Multiphysics4.3b. The findings show that the quantitative evaluation is more viable according to the optimized parameters. This method has a certain reference value for quantitative analysis and designing inspection system with eddy current stimulated approach.
Study on the Design of the Ventilation of Ship Engine Room Control System
Authors: Ling Sun
Published: December 2014

The control system of ventilation to engine room which based on Profibus-DP field bus and Siemens S7-300PLC is introduced in this paper. This paper also describes how to construct the control system by applying the Profibus-DP and S7-300 and the development of the supervision and control system using Wincc. The hardware and software design and system program are also presented in this paper. It has some application value.
Study on Prediction of Chaotic Time Series Using Least Squares Support Vector Machines
Authors: Wang Xin You , Gao Guo Fei , Qu Zhan , Pu Hai Feng
Published: December 2014

The predictions of chaotic time series by applying the least squares support vector machine (LS-SVM), with comparison with the traditional-SVM and-SVM, were specified. The results show that, compared with the traditional SVM, the prediction accuracy of LS-SVM is better than the traditional SVM and more suitable for time series online prediction.
Moisture Resistance of the As-S-I Glasses
Authors: Semencha Aleksander , Kurushkin M.V. , Markov V.A.
Published: December 2014

In the present work, glasses of the As-S-I system have been synthesized, the region of glasses stable in moist air has been investigated, the properties of the glasses have been determined.
Energy Efficiency Analysis of PET Hydrolyzed by Different Ways of Microwave Irradiation
Authors: Wang Mi Mi , Liu Na , Liu Zhi De , Zhang Dong
Published: December 2014

The effect of microwave irradiation way on hydrolytic depolymerization of poly (ethylene terephthalate) (PET) was studied at 175°C, 180°C and 185°C. Based on this study, an additional experiment that the intermittent radiation time was one tenth of total reaction time (intermittent radiation (1/10)) was conducted to research the microwave energy utilization. The results showed that the energy efficiency increased as the temperature rose. And the energy utilization of intermittent radiation (1/10) was 16.7% higher than that of the continuous radiation at 175°C.
Occurrence and Control of Crack on Counterweight of Forklift Cast with High Manganese Pig Iron
Authors: Li An Min , Zheng Qi Feng , Yu Zheng Yong , Chen Ruo Huai , Huang Yu Wei
Published: December 2014

Cracks easily generate in counterweight of forklift cast with high manganese pig iron which is by-product of smelters or low-grade manganese pig iron of Guangxi province of China. The causes of cracks formation and the solutions of cracks elimination are discussed. A large amount of carbides, phosphorus eutectic, inclusions, and arsenic element distribute on grain boundary of counterweight that causes crack. The measures to solve the cracks are as following: casting process would be improved, carbides and inclusions would be refined by adding rare earth, and arsenic would be eliminated by adding dearsenic catalyst which is composed of Ca-Fe alloy and the strong reducibility based additives. The distribution of phosphorus would be improved and phosphorus eutectic would be eliminated by adding 0.08%~0.15 %( wt %) Al or 1%~2 %( wt %) Mo.
Study on Application of Low Velocity Non-Darcy Flow
Authors: Xin Xian Kang , Yu Gao Ming , Li Zhuo
Published: December 2014

The seepage underground is rather complicated in the low permeability reservoir and the heavy oil reservoir. One important point to note is that the seepage in these reservoirs does not follow Darcy's law, which brings difficulty to the development of oil field. Study on low velocity non-Darcy percolation theory, the impact on oil production index is analyzed. The key is the summary of the application in order to provide theoretical references for the rational exploitation of the relevant oil fields.
Efficient and Circulation Raw Coal Processing Technology
Authors: Huang De Jie , Cao Lian Min , Wang Peng Huai
Published: December 2014

This paper analyzed the raw coal mining and transportational process to get the cause of raw coal of poor quality and more impurity. And, this paper research on raw coal processing technology of efficient and circulation, from coal preparation technique, slurry drying technology and efficient warehousing system. Finally, raw coal is exploited and transported on condition of efficient and environment protection to realize green and circulating production.
Experimental Analysis for Jet Noise Reduction of Chevron Pylon-Based Nozzles
Authors: He Jing Yu , Xu Ying Bo
Published: December 2014

The experimental analysis is conducted for jet noise reduction of separate flow chevron pylon-based nozzles at takeoff condition. The experimental results indicate that the pylon makes a noise reduction at low-frequency but produces an increase at high-frequency, together with an overall sound pressure reduction below the pylon. Compared to chevron nozzle without pylon, the adding of a pylon reduces noise benefit of chevron nozzles found in the isolated nozzle without a pylon. The best low-frequency noise reduction is located below the pylon where peak noise reduction is as high as about 1.3dB on frequency spectrum.
Research on Parameter Optimization Method of v-SVRM Forecasting Model for Crane Load Spectrum
Authors: Lu Feng Yi , Wang Shuang , Xu Ge Ning , Qi Qi Song
Published: December 2014

Precise load spectrum of crane is essential to its fatigue analysis and life assessment. The v-SVRM (v-support vector regression machine) correctly established is key to an undistorted load spectrum. Due to computational complexity, low accuracy, poor stability of the conventional model parameter selection method with v-SVRM, a fruit fly optimization algorithm with the characteristics of easy adjustment and high precision is applied. In order to make three kind parameters synchronously optimizing search, the fruit fly algorithm is improved in consideration of parameters characteristic of the crane load spectrum v-SVRM prediction model. Then, combining the improved fruit fly algorithm with penalty function and using anti-bound thought, a secondary optimization is carried out for three kind parameters. The results of examples engineering show that the optimal parameter group selected by the improved algorithm shortens the training time, reduces the computational complexity and improves the learning accuracy and generalization ability of v-SVRM model. The accuracy and stability of parameters is enhanced by secondary optimization, so as to a better robustness and versatility of v-SVRM predictive model. It also provides a new way for the establishment of efficient and convenient crane load spectrum v-SVRM forecast model.
Research on Aqueous Foam Jamming Device for Transport Vehicle
Authors: Huang Jian
Published: December 2014

Aqueous foam jamming Device for Transport vehicle , by use of its own power system and storage devices, make the gases within the air tank filling the bubbling liquid to bubble inner the liquid storage barrel,Thus forming the top and around the vehicle for a long time a large number of floating, connected into a piece of aqueous foam base,To interfere with enemy reconnaissance and surveillance and infrared-guided, laser-guided, millimeter wave-guided and other precision-guided weapons hit,To improve the battlefield viability of transport vehicles.
Stability Analysis of Latticed Shells
Authors: Shi Wen Bin
Published: December 2014

ANSYS14.0 structural analysis software is used in order to make a ring rib-reticulated shell for the overall stability analysis. Considering the geometric nonlinear analysis and initial geometric imperfections influence , obtain a key node of the load - displacement curve and assess the ultimate strength of the structure. The results showed that: the structure meets the "Space grid rules" for monolayer shells stability requirements. And it is found that load distribution form and initial geometry defect has a great deal whit bearing capacity of single-layer lattice shell stability by comparison.
The Research on Simulation Model of BF Raceway Based on Kinetic Theory of Granular Flow
Authors: Wang Jing , Yang Guang Qing , Ying Feng , Mu Jing Qin , Gao Wei , Ding Wei Ying
Published: December 2014

Tuyere raceway was known as the "engine" of the blast furnace, which plays a very important role, but it is very difficult to be directly measured and researched, because of limitation of experimental methods. In this paper application of kinetic theory of granular flow,coke particles as a pseudo-fluid, the two-phase raceway model of gas-solid was constructed by used of Eulerian two-fluid theory, and the model was verified correct.
Application of Improved Hash Function in the Message Authentication and Message Integrity
Authors: Jin Shi Guo , Wang Guang Jiang
Published: December 2014

The hash function is the acceptance of variable length data input, and generating function of fixed length data output. Message integrity requirements of any changes to the received data can be found, and main function of hash function is to realize the integrity of data security. The hash function is very suitable for certification and ensures data integrity. This paper firstly analyzes the working principle and performance of the improved hash function. The paper proposes application of improved Hash function in the message authentication and message integrity.
Study on GPRS Mobile Terminal System for Rural Informatization
Authors: Zhao Yan Ling , Zhang Shi Hai
Published: December 2014

In this paper, GPRS module, including the design and implementation of the telephone terminal interface circuit design TV interface circuit, interface GPRS module and starting circuit are designed based on ARM embedded platform. Software is also designed primarily Bootloader and Linux kernel porting, system part of the driver, the results of the design through experimental verification, the results show that the system can communicate data, you can use AT commands to achieve messaging and voice capabilities.
Mechanics Analysis and Optimization of the Reachstacker Spreader
Authors: Shu Yu Feng , Zheng Yong Feng
Published: December 2014

This paper establishes the finite element model of reachstacker spreader, makes static strength calculation under eight typical operating conditions with rated load, based on the calculation results, it points out the weaknesses of spreader and gives some corresponding improvement measures for the drawbacks. Further analysis shows that the maximum stress of improved spreader mechanism has reduced 10.1%, which demonstrates the effectiveness of improvements.
Experimental Study on Spray Characteristics of Diesel Engines and Analysis of Fuel Dripping Phenomenon
Authors: Wu Yu Qiang , Wang Qian , Gao Zhi Sheng , Zhang Zhou Rong , Dai Li Ming
Published: December 2014

Experimental study on macroscopic spray characteristics of a certain type of domestic common rail injectors under the conditions of different injection pressures was carried out through a high-speed digital camera. Furthermore, a fuel dripping phenomenon at the end stage of injection was observed through the high-speed digital camera equipped with a long-distance microscope, and a further analysis of the phenomenon was made. The results show the increase in the injection pressure can evidently enhance spray cone angle and expand the scope of spray field in combustion chamber, which is conducive to air-fuel mixture. The spray cone angle during the development spray shows a double-peak shape. And the long response-time of seating of solenoid valve core that disables the injection cutting off in time is one of factors causing fuel dripping phenomenon.
Multi-Stage Ejector Design and Numerical Simulation for Marine Gas Turbine
Authors: Sun Tao , Wan Bo , Sun Chang Jiang , Ma Zheng Wei
Published: December 2014

With the continuous development of infrared-guided weapons, the survival of ship at sea faces increasingly challenges especially high-risk waters. The ship gas turbine exhaust ejector is the core component parts, charged with the task of reducing or even eliminating the infrared radiation signal of ship gas turbine exhaust systems. In the designing of exhaust ejector, structure forms of nozzle have a big influence on its ejector effect. Making a rational design of nozzle, which working in a narrow space, to reduce the exhaust temperature effectively while minimizing the impact of flow of gas turbine body has always been a focus and difficulty. In this article, a multistage ejector is designed by adding a second-stage ejector section based on an independent design of single-stage ejector.
Application of Object Oriented Computer Automatic Classification in Land Use
Authors: Yan Xi Feng , Wang Jing Lan , Zhou You Hua , Liu Feng
Published: December 2014

Information extraction of object oriented method was applied to study the land use change, this paper puts forward a kind of application of object oriented remote sensing image classification to extract land change information extraction methods to change the land use, introduces the calculation of object oriented classification, classification of ideas and technology process, automatic extraction of water information in the process of classification to discuss the specific computer.
Analysis of the Antiplane Problem of Functionally Graded Coating with Generally Oriented Crack
Authors: Guo Li Fang , Li Xing , Yang You Zhen
Published: December 2014

Investigated is the anti-plane problem of functionally graded strip with an inclined crack sandwiched between a half infinite substrate and an elastic strip. Fourier transforms and integral equation are used to reduce the crack problem to a system of singular integral equation with Cauchy kernel, which is solved numerically by application of the Gauss-Chebyshev integration formula. Numerical results show the effects of the material gradient parameter and crack configuration on the field intensity factors of the crack.
Design of Low Noise L-Band Frequency Source
Authors: Zhao Shuang , Yue Yu Bo
Published: December 2014

Frequency synthesizer provides frequency source for modern communication systems and computer systems. It is an essential part to the modern electronic system devices. This paper describes a wideband, frequency agile, low phase noise, low spurious frequency synthesizer. By using frequency multiplying technology, an S-band frequency source as the DDS clock is designed. The actual frequency source was tested. The test results show that the frequency synthesizer achieves the desired objectives.