bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Biological Materials with the Dehydration Technology and Equipment of Banana Stems
Authors: Xu Shu Ying , He Zhong Ping , Tan Wei , Zhang Yu Cang
Published: June 2013

The dehydration processing of banana stems was carried out to obtain plant fiber, and some structure characteristics were tested. An experimental design with different equipment that was studied to discover the effect of the dehydration rate of banana stems. We are trying to extract natural fibers from Hainan immense resources of biological materials. The paper also relates to an equipment for slicing the banana stem into elongated strips and pressing the strips. The result shows that the dehydration rate of banana stem which pressed by Sugarcane Mill (SM) was 57.0%(roots), 58.0% (central) and 51.0% (sheath) respectively. The samples which pressed by Open Roll Mill (ORM) have a lower level of dehydration rate (29.3% of roots, 12.1% of central, 13.5% of sheath, respectively).
Simulation Technique Application in Composite Material Structure Manufacture
Authors: Hu Wan Qiang
Published: June 2013

Along with the wide range application of composite material structural parts in the field of aviation, the research of its manufacture technique, especially the research of composite material entirety structure parts with complex outline surface becomes more and more important. This article proceeds the simulation analysis of spring-back transformation caused in proceedings of composite material structure solidifying. It states the necessity of the application of composite material solidifying deformation simulation technology in airplane structures manufacture.
Oil and Gas Well Hole Structure and Application in Superdeep Well with Analysis of Material Properties
Authors: Li Ling Feng
Published: June 2013

The designing level of oil and gas well hole structure and application in superdeep well with analysis of material properties play a key role in the expected production target to superdeep oil and gas wells. This paper introduces the hole structure of standard casing size series, main problems in superdeep wells with analysis of material properties, and solving means such as: using liner as production casing, cementing under small clearances of borehole-casing annulus and intermediate casing-production casing annulus, reaming and close clearance hole structure, analysis of material properties and so on. By application, the study above has a good practicality.
Stress Study and Material Analysis for Well Hole Structure of Nonstandard Casing Size Series and Application
Authors: Li Ling Feng
Published: June 2013

The stress study and material analysis for well hole structure of nonstandard casing size series in oil and gas well is developed aimed at helping the oil and gas well production engineers to analyze and design in oil and gas well production. This paper presents the development background, hole structure of nonstandard casing size series, hole structure design of nonstandard casing size series for reducing the stress level, stress study, material analysis, steel grades of corrosion-resistant nonstandard casing and application. It will provide a useful tool for oil and gas well production engineers.
Study on Stress-Velocity Elastic with 2.5D Numerical Simulation for Wavefields of Cross-Hole Seismic in Anisotropy Heterogeneous Medium
Authors: Liu Bao Tong
Published: June 2013

Numerical simulation is an effective approach for identifying and analyzing elastic wavefields in subsurface. From the first-order stress-velocity elastic wave equations in VTI medium, this paper use high-order stagger-grid finite-difference scheme to compute 3C wavefields in 2D space, performing 2.5D simulation. A method of establishing geological model is presented. Boundary reflections are suppressed successfully by PML. Characteristics of synthetic data by this method are coincident with field data in both kinematics and dynamics
Mechanics of Composite Layered Rough Medium in Contact
Authors: Cai Shao Biao , Zhao Yong Li
Published: June 2013

This study presents a first attempt to develop a numerical three-dimensional multilayered (more than 2 composite layered coatings) elasticperfectly plastic rough solids model to investigate the contact behavior under combined normal loading and tangential traction. Contact analyses are performed to study the effects composite thin film layers. Local contact pressure profiles, von Mises stresses, and shear stresses as a function of material properties and applied normal and tangential friction loads are calculated.
Analysis of Ball Valve Sealing Pressure Ratio Based on UG Nastran
Authors: Song Rong , Zheng Fang
Published: June 2013

According to the calculation of sealing pressure ratio in the ball valves seat sealing surface, Companies generally adopt the experience and the correction formula. The above methods can not reflect the real distribution of sealing pressure ratio in the ball valves seat sealing surface. Through the UG Nastran finite element analysis environment, This study simulates the actual working environment, precise Calculated the real distribution of Sealing pressure ratio, In order to improve the development speed and quality of enterprise's new product.
A Mechanism Design of Friction and Wear Test Based on Liquid Medium
Authors: Zhao Wei Wu , Yu Xiang , Luo Zhi Hang , Ai Jie , Zhao Xi An
Published: June 2013

Friction and wear tester is an important device for detecting friction and wear properties of materials. There is inadequacy of research on friction and wear behavior of geological drilling mechanisms serving under complicated liquid circumstances like water, oil and mortar. This article describes an accessory mechanism for commonly used ball-on-disc tribometer which can be applicable in liquid medium. A new oil cup is designed and composed of oil cup sleeve, oil cup lid, transition station, worktable and etc. Interference connection is adopted between oil cup and rotary test bench of tester. Materials are chosen so as to meet requirement from actual working conditions and to simulate the friction and wear test in liquid medium. The mechanism designed share characters of convenient operation, in-situ observation and friendly environment.
Study on Information System with Condition-Based Maintenance Models for a Continuously Degrading System
Authors: Huang Ao Lin , Li Qing Min , Li Tie Bing
Published: June 2013

This paper considers on-condition maintenance of a continuously degrading information system, in which the inter-maintenance time and the maintenance time depend on the condition of the system at which maintenance is carried out. The durations of preventive maintenance activities are supposed to be exponentially distributed. Assuming deterioration of the system follows a gamma process, models are established to maximize the system average availability when the effectiveness of the preventive maintenance activity becomes weaker and weaker. Optimal solutions on the condition of the system at which maintenance should be performed and the number of times of maintenance action to be carried out are obtained based on Monte-Carlo simulation. A case study is given to show the procedure of the maintenance model and simulation.
Study on Electrical Automation with Design of the Constant-Precision Frequency Meter Based on MCU and CPLD
Authors: Yang Xiao , Zhai Yu Wen
Published: June 2013

According to the principle of constant-precision frequency measurement in the field of electrical automation, the relationship of frequency measurement precision and gate time is analyzed. And the constant-precision frequency meter based on MCU and CPLD is designed in this paper. It can keep the relative error being 0.0001% constantly when frequency measuring within the range of 0.1Hz to 1MHz. Its simulation results by MUX+PLUS is presented.
Study on Electrical Automation with Design of the PWM Signal Generator Based on MSP430
Authors: Zhai Yu Wen , Liu Gang , Yang Xiao
Published: June 2013

The PWM signal generator, in which the DC voltage, sine AC or arbitrary waveform signal can be the base wave to control the duty cycle, is designed in this paper. The high-speed comparator modulates the two signals, one is the base wave signal generated by MSP430F169 and the other one is the PWM modulated wave signal generated by the voltage controlled oscillator, and then generates the PWM signal. The frequency of the PWM signal can be regulated, the frequency and waveform of the base wave can be programmed and the three-phase SPWM signal can be generated. The PWM signal generator can be applied in the field of converting technology in power electronics and electrical automation.
A Brief Study on Electronic Materials for Training Autonomous Abilities of Learners Based on Information System
Authors: Xie Chun Lin
Published: June 2013

Due to the development of electronic materials, it stimulates the autonomous abilities of learners.Along with the advance of multimedia technology and network technology,teaching based on information technology has been spread all over the world. It has brought about new concepts,new methods and new strategies for modern education and gradually changed learners’s learning ways. Therefore, it is one of essential issues how to develop students’ autonomous abilities of learners with the help of electronic materials.
Study on the Effect of Spinning Conditions on Performance Parameter of Hollow-Fiber Ultrafiltration Membrane Filament
Authors: Zheng Qing Zhu , Yuan Jun Sheng
Published: June 2013

In order to clarify the relationship between spinning conditions and performance parameters of hollow-fiber ultrafiltration (UF) membrane filament, polysulfone (PSF) hollow-fiber UF membrane was prepared, meanwhile, the performance parameters were investigated when the rotation rate of controlled volume pump and the winding speed of UF membrane filament is stationary. It was found that with the water flux of central tube in spinneret increase, the diameter and loading density increase, the thickness decrease, the sectional area and porosity increase, the tensile strength and fracture length increase firstly and then decrease. Comprehensively considering the appearance size and tenacity, the best water flux of central tube in spinneret is 20 ml/min.
Shock-Induced Chemical Reaction between Iron and Enstatite
Authors: Chen Xiu Fang , Zhang Chao Ping
Published: June 2013

By using a two-stage light gas gun, two experiments of shock recovery experiments with initial sample of Fe+(Mg, Fe)SiO3 (En) were conducted between 78 and 113 GPa shock pressure (the corresponding temperature is estimated as 3000~5000K). The recovered samples were analyzed by X-ray Diffraction (XRD).The XRD observation at the middle section of two recovered samples illustrates the new composition of recovered samples is (Mg, Fe)2SiO4.Comparing with the recovery experiments of MgO+SiO2 ,we can infer that iron and perovskite react to form SiO2 and (Mg, Fe)O. The experiments result indicates that reaction between liquid iron and (Mg, Fe)SiO3 perovskite may occur at the core-mantle boundary in geological history. The reaction creates a very heterogeneous zone at the base of the mantle. Si and O dissolved in liquid iron are rapidly dispersed by the flow of the liquid outer core.
Study on Laplace Growth and Diffusion Limited Aggregation with Material Properties
Authors: Sui Shou Gang , Gong Shu Lan , Wang Tao
Published: June 2013

The diffused fractal growth has a wide range of applications in material fields, especially the diffusion limited aggregation. As a result, the research of fractal growth has important significance in material science. In this paper, iterative steps are introduced in Laplace's equation based on the meaning of random walk, and computer simulation is used to analysis the influence of steps' change on fractal growth.
Design of CMP Slurry in CMP SiC Crystal Substrate (0001) Si Surface Based on Alumina (Al2O3) Abrasive
Authors: Su Jian Xiu , Zhang Zhu Qing , Liu Xing Long , Liu Zhi Xiang , Feng Qi Gao
Published: June 2013

SiC crystal substrate has been widely applied in the field of semiconductor industry and optical components recently,such as IC and semiconductor lighting. In this paper, according to orthogonal design, the composition selection and optimization of chemical mechanical polishing (CMP) slurry based on alumina (Al2O3) abrasive had been done in CMP SiC crystal substrate (0001) Si surface by a lot of tests. A CMP slurry based on alumina (Al2O3) abrasive for SiC crystal substrate (0001) Si surface had been obtained. According to the CMP test results, the material removal rate (MRR) is about 3 nm/min and the surface roughness Ra is about 0.198μm.
Microstructure and Electrochemical Properties of Ce-Containing 7072 Al Alloy
Authors: Feng Jing , Ding Dong  Yan , Zhang Wen Long , Gao Yong Jin , Chen Guo Zhen , Huang Yuan Wei , Tang Jin Song
Published: June 2013

The microstructure and electrochemical properties of Ce-containing 7072 Al alloy were investigated through transmission electron microscopy (TEM), scanning electron microscopy (SEM) and Tafel polarization analysis. It was found that Ce alloying could result in a formation of finer grains in the simulated brazing alloys. The 7072 Al alloy with 0.15% Ce had desirable distribution of precipitates. The electrochemical testing results indicated that Ce element had a great impact on the corrosion potential of the alloy tested in 0.5% NaCl solution. Alloying with 0.15% Ce element could make the corrosion potential shift to inert direction and reduce the corrosion current density. An excessive Ce addition could weaken its positive effect on the corrosion resistance of the Ce-containing alloy.
Synthesis of (S)-Tert-Butyl 3-Hydroxybutyrate by Asymmetric Reduction of Tert-Butyl Acetoacetate with Saccharomyces cerevisiae B5
Authors: Ou Zhi Min , Feng Wen Fei , Xu Li
Published: June 2013

S)-tert-butyl 3-hydroxybutyrate was synthesized by asymmetric reduction of tert-butyl acetoacetate with Saccharomyces cerevisiae B5 as catalyst. The enantiometric excess of (S)-tert-butyl 3-hydroxybutyrate increased with addition of more amount of substrate. High optical purity of product can be obtained when 6 g/L chloroform was used as inhibitor. The optimum reduction time, temperature, and initial pH of reaction mixture were 60 h, 30 °C, and 6.2. Addition of more biomass and lower amount of substrate helped to get high conversion. Conversion and enantiometric excess of product reached 100% when initial substrate concentration and biomass were 2.0 g/L and 140 g/L with 6 g/L chloroform as inhibitor.
Supercritical Fluid Extraction of Polygonum cuspidatum and Subsequent Isolation by Simulated Moving Bed Chromatography
Authors: Liang Ming Tsai , Liang Ru Chien , Yu Shu Qi , Yan Ri An , Liang Ku Yuan
Published: June 2013

In this work, supercritical carbon dioxide with ethanol as cosolvent was employed to extract bioactive compounds fromPolygonum Cuspidatum. Effect of temperature for 40 and 50 C on the extraction at 35 MPa was examined. It was found that extraction at 50 C resulted in high yield. A two-stage extraction at 50 C and 35 MPa was then designed to investigate effect of cosolvent on the recovery of resveratrol and emodin. The first stage extraction by solely using carbon dioxide can rarely extract resveratrol, but adding ethanol as cosolvent in the second stage significantly increases the extraction of resverarol and emodin. The crude extract obtained in the second stage was very stable against agglomeration and precipitation, because the first stage extraction helped to remove impurities from thePolygonum Cuspidatum. The stable crude extract was subsequently used as the feed for the SMB (simulated moving bed) separation. In this work, experimental validation was completed by solely using single SMB to isolate resveratrol, emodin, and physcion from the crude extract. As conducting the SMB experiments, the Triangle theory was used to help to determine the separable operating conditions. From the discussion of the experimental results, the criterion to obtain the pure resveratrol and physcion, and the concentrated emodin were depicted. Since both the extraction and the purification are conducted at low temperature, the bioactivity of the produced natural products will totally be preserved. The two-stage extraction and subsequent purification in this paper will provide greener and effective alternative for the development of botanical drugs.
Ultraviolet Detector Based on TiO2 Thin Film
Authors: Ma Qi Qi , He Biao , Huang Xiao Kun , He Yan Lan , Yu Xiao Yan , Peng Gang
Published: June 2013

In this paper, TiO2 thin film with MSM (metal-semiconductor-metal) structure was used to fabricate ultraviolet (UV) detector. The film was fabricated via sol-gel method on silicon wafer with 300nm oxide layer and annealed at four different temperatures (400oC, 500oC, 600oC and 800oC). The quality of the thin films was characterized by means of X-ray diffraction and scanning electron microscope. Then a pair of symmetric Ag electrodes were deposited by thermal evaporation through a shade mask of interdigital structure. The photo-electric properties of the device including I-V characteristic, transfer characteristic and time response et.al. were studied with or without explored to 254nm UV light. The electrical measurements of the device show a big increase of current when explored the device to 254nm UV light, and the rise time of the device is very quick, but the fall time is relatively long. The detector with simple fabrication process, low cost, and superior performance would provide a potential application in UV detectors.
Preparation of Poly(Vinylbenzyl Chloride)@Lead Sulfide (PVBC@PbS) Core-Shell Nanospheres and Adsorption of Phenol
Authors: Ye Jian , Sun Lan Ping , Gao Sheng Ping
Published: June 2013

We have demonstrated the fabrication of novel poly(vinylbenzyl chloride)@lead sulfide (PVBC@PbS) core-shell nanospheres via the atom transfer reversible polymerization (ATRP) of lead dimethacrylate (Pb(MA)2) initiated from methyl chloride groups on surfaces of PVBC nanoparticles and subsequent reaction with ethanethioamide. The chemical structure of the PVBC@PbS nanospheres was confirmed by the fourier transform infrared (FTIR) spectroscopy, and the morphology of the nanospheres were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The average size of the nanospheres was determined to be about 100 nm. The PVBC@PbS nanospheres were able to absorb phenol in the solution, and the balanced adsorption capability of phenol to nanospheres could reach to 7.2 μg/mg.
Anodic Plasma Electrolytic Nitrocarburizing of Low-Carbon Steel
Authors: Belkin Pavel N. , Kusmanov Sergei A. , Naumov Alexander , Parkaeva Yulia
Published: June 2013

Alternating surface oxide and hardened layers were fabricated by means of anodic plasma nitrocarburizing of low-carbon steel in aqueous ammonium chloride/carbamide solutions. The effect of electrolyte composition and treatment conditions on the phase characteristics, structure and properties of the surface layers was studied. The distributions of hardness, phase and structure composition of the surface layers were defined. Controllability of diffusion saturation with nitrogen and carbon by variation of electrolyte composition and treatment temperature was shown. The formation of nitrogen and carbon, which are diffusing into the steel surface at anodic plasma electrolytic nitrocarburizing was described.
Recovery of Uranium (VI) from Water Solutions by Membrane Extraction
Authors: Zakrzewska Grazyna , Bieluszka Pawel , Chajduk Ewelina , Wolkowicz Stanislaw
Published: June 2013

The extraction of uranium from aqueous model solutions, as well as from real solutions reulting from leaching uranium ores was carried out in the system equipped with the Liqui-Cel® Extra-Flow membrane contactor with polypropylene capillary membranes. D2EHPA in toluene was used as an organic phase. Different arrangements of flow inside the membrane module were tested. The better approach appeared to be the arrangement with aqueous phase in the shell side of the contactor and organic phase inside the capillary membrane. The extraction efficiency for model solutions reached 95% and 87% for real post-leaching liquors.
Comparison of One-Step Method and Two-Step Method of Ilmenite Concentrate Smelting Titanium Slag
Authors: Pan Rong Jian , Yang Shao Li
Published: June 2013

according to analyzing and summarizing the literature of ilmenite concentrate smelting titanium slag, comes to conclude: the production process of ilmenite concentrate smelting titanium slag can be divided into the one-step method and two-step method, dominated by two-step method at home; foreign dominated by two-step. This paper introduces the main content of one-step method and two-step method, and compares the two methods from aspects of technology, quality, cost and environmental protection, and finally summarizes it.
A New Primary Lithium Battery with Fluorinated Ketjenblack Cathode
Authors: Lu Jia Chun , Liu Zhi Chao , Huang Ping , Fang Quan , Zhu Min Hua
Published: June 2013

Li/graphite fluoride (GFx) cells, with highest theoretical capacity in primary lithium batteries, high energy density, long shelf life, safety and a wide operating temperature, have been widely noticed during the past decades. However, the low electronic conductivity and discharge potential of Li/GFx cells obviously limited its applications. The key to improve the energy performance of Li/GFx cells is to increase the transportation ability of Li+ in cathode materials. Considering its high specific surface area, large bulk volume and layer spacing, Ketjenblack is used for preparing the cathode materials with highly stored energy. Based on gas-solid fluorination, we synthesized the fluorinated Ketjenblack (FKB). As the cathode materials of lithium batteries, electrochemical assay show that the lithium/FKB cells have a novel discharged voltage of 3V versus Li/Li+ electrode, and a special capacity near 800 mAh g-1. The lithium/FKB cells may be used for a new highly stored energy device.
Inverse Problem with Integral Overdetermination for System of Equations of Kelvin-Voight Fluids
Authors: Khonatbek Khompysh
Published: June 2013

In the paper we consider an inverse problem for the three-dimensional nonlinear pseudoparabolic equations describing the Kelvin-Voight motion. The inverse problem consists of finding a velocity field and pressure which is gradient and also a right-hand said of the equation. Additional condition about the solution to the inverse problem is given in the form of integral overdetermination condition. The existence and uniqueness of weak generalized solution of this inverse problem in the sobelev space is proved.
New Mortar for Clay Masonry Structures
Authors: Gouny F. , Fouchal F. , Maillard P. , Rossignol S.
Published: June 2013

Construction system using timber frame with earth brick infill shows the formation of cracks at their interface with the fluctuation of temperature and humidity. Geopolymer binder has been identified to create good adhesion between these two materials. The aim of the study is to characterize the pullout and shear mechanical behavior of laboratory masonry assemblies of wood, geomaterial binder and extruded earth brick. Compression test on the brick were also performed. Full-field deformation of double shear test sample werecarried-out by digital image correlation (DIC) in order to better describe and understand the mechanical behavior. The geopolymer binder show good adhesion properties with mean shear test results around 1.5 MPa and pullout test result around 0.82MPa.
Electromechanical Properties of Vertically Aligned Carbon Nanotube
Authors: Rashidi Alimorad , Omidi M. , Choolaei M. , Nazarzadeh M. , Yadegari A. , Haghierosadat F. , Oroojalian F. , Azhdari M.
Published: June 2013

In this paper a simple method is used for fabrication of vertically aligned carbon nanotube (VACNT) within the cylindrical pores anodic aluminum oxide (AAO) substrate. Electronic and mechanical properties of VACNT have been obtained after removing AAO substrate. Vertically aligned carbon nanotube shows very interesting electromechanical properties which can be used in CNT-based sensors to detect chemical analytical or physical properties such as temperature orpressure.
Virtual Health Monitoring System for Wing Structure
Authors: Wan Fang Yi , Qin Zeng
Published: June 2013

Based on virtual simulation results, the structural health monitoring (SHM) system for the wing structure was established, which could detect the structural damages. With the FE model of the wing structure in the aerodynamic loads conditions, the response parameters of the wing can be calculated to reveal the damages characteristics. There are obvious differences between damaged wing and normal wing which can be utilized to detect the damages and locate the damaged positions.
SnO2 Nanofibers Gas Sensor Detecting H2 Dissolved in Transformer Oil
Authors: Peng Shu Di , Wu Gao Lin , Wang Qian
Published: June 2013

Hydrogen is an effective fault gas dissolved in transformer oil, and online monitoring its concentration has important meaning on condition assessment and fault diagnosis of power transformer. A facile and simple synthesis method of ultra-sensitive SnO2 nanofibers through a hydrothermal approach was reported. The crystalline phases and microstructures were performed by X-ray powder diffraction and field-emission scanning electron microscopy. The gas sensor based on prepared SnO2 nanofibers was fabricated by a side-heated preparation, and its gas sensing performances to H2 were measured. The fabricated sensor exhibits excellent sensing properties to H2, such as low optimum operating temperature, high gas response, rapid response and recovery time, good stability and repeatability.
Study on the Time Synchronization System in Coal Mine Grid
Authors: Wang Zhi Jie , Wang Yan Wen
Published: June 2013

The paper first introduces the importance of the time synchronization system in the coal mine power supply system and the common reference clock sources, which are GPS and Beidou system. Then, it analyzes the characteristics of the common working modes of time synchronization system. Finally, the time synchronization system in coal mine gird based on host/standby mode and spare each other mode is proposed, which provides significance for the implementation of such technology in coal mine power supply system.
Synchronous Control of Airbag Ejection Mechanism for Underwater Logging Device
Authors: Dong Chun Fang , Feng Guo Hong , Lu Juan
Published: June 2013

For the characteristics of electro-hydraulic position synchronous control system with long pipelines of the underwater logging device’s airbag ejection mechanism, the mathematic model of the single cylinder subsystem considering pipeline effect is established. On this basis, the tracking controller of subsystem is designed by combining a disturbance observer with a Smith predictor and the tuning method of control parameters is given using ITAE criterion. The fuzzy PI controller is designed based on a composite synchronous control scheme. The simulation results show that the proposed control method has good robust performance and can meet the requirement of high precision synchronous.
The Influence of Beam Polarization Degree on SPR Phase Sensor
Authors: Zhang Ying Ying , Gu Shu Long , Zhou Lin
Published: June 2013

The influence of incident beams polarization degree on the SPR phase sensor is theoretically and experimentally studied in this paper. The results indicate that the decrease of the polarization degree will lead to the phase difference curves jump decrease near the resonance angle for the ellipsometry method. Besides, the lower the polarization degree, the smaller the jump, which can also lead to reduced sensitivity of the SPR phase sensor. For example, the sensitivity with the polarization degree of 0.9 is 90% that of the polarization degree of 1.
The Research on the Measure System of the Shield Tail Clearance Based on Digital Image Processing Technique
Authors: Guo Jing Bo , Zhang Li Bin , Liu Jin Zhi , Gao Chong Yi , Niu Jiang Chuan
Published: June 2013

In order to solve the measurement problem of the shield tail clearance in the shield construction, the shield tail clearance automatic measuring system which is based on digital image processing technique has been developed in this paper, hardware and software are both designed in this system, and the image features can be extracted by image enhancement, thresholding and edge detection which are digital image processing technology, and the clearance is calculated. Field tests show that the system has a friendly interface and is easy to be operated .What is more, the clearance can be measured automatically with high accuracy and stable performance, It provides security for the shield construction.
The Design of Household Automatic Control Water Supply System Based on PLC
Authors: Wang Rui , Zheng Wei Gang
Published: June 2013

This paper design a solar heating water supply system which can use solar energy , the system is better than the traditional water supply system in the past .The PLC centralized control and intelligent control system can use more full solar energy to save resources and protect environment for the purpose of saving energy .
Trajectory Planning Research of the Filter Shell Special Arc Welding Robot
Authors: Wang Ling , Fan Xin Qing , Qi Fu Yan , Wei Wan Hua
Published: June 2013

The detailed analysis of the structure and paramerers of the connecting rod is put forward by using the improving D-H method to establish the link coordinate system and the kinematics equation, based on the special filer shell arc welding robot with six degrees of freedom designed. Therefor, the correctness of the kinematics equation is verified though the simulation of Matlab function with the robotics toolbox. The anasysis simulation results show that the rationality of the robot structure that based on the kinematics analysis, is feasible.
Design of an Intelligent Entrance Guard System with Multiple Identity Authentication
Authors: He Hong , Li Li , Zhang Zhi Hong
Published: June 2013

This paper has proposed a kind of intelligent entrance guard system, which is based on 32 bit ARM7TDMI embedded system combined with RFID technology. By expanding sound alarm, display and communication module inside, RF, camera module and fingerprint module outside, it can realize multiple identity authentication, so the security and protection ability of the entrance guard system get enhanced.
Design and Analysis of a Security Alarm System for Railway Transport of Large Equipment Based on Displacement Detection
Authors: Qian Run Hua , Zhang Qiang , Wang Pu Kai
Published: June 2013

Aiming at the security problem of railway transport caused by loading position of large equipment, a security alarm system for railway transport of large equipment is developed based on displacement detection by photoelectric matrix. The technologies of photoelectric measurement, wireless communication and computer control are comprehensively integrated, the wide temperature components, low power circuit and high-capacity batteries are used, a variety of energy saving operation modes and anti-interference technical measures are adopted, systematically optimized and comprehensively analyzed. Tests show that the designed system has the characteristics of perfect function, low power consumption, strong anti-interference capability and high reliability, which plays important role on security of railway transport and avoids traffic accidents caused by loading position of large freight.
Differential GPS Terminal Shooting Range Positioning System Design
Authors: Dong Fang Dong , Wang Zhi Jun , Liang Shao Lei , Wu Guo Dong
Published: June 2013

According to the shortcomings of currently shooting range ballistic measuring method, the differential technique is applied in positioning system through analyzing the differential GPS technique to realize range ballistic high-precision measurements. This paper introduces the shooting range positioning system design and the realization of software terminal. This method overcomes the disadvantages of shooting range measurement .Positioning accuracy has indeed been improved through this way.
Study on the Error Analysis of Pipeline Inspection Robot Mileage Wheel Localization
Authors: Xu Hong , Li Zhu Xin , Li Yuan Yuan , Gong Li Hong
Published: June 2013

Currently, the development of our pipeline inspection technology is rapidly, pipeline inspection robots were widely used , it providing scientific and accurate detection data for pipeline maintenance and overhaul. The accurate localization datas provided by pipeline robots are the basis for pipeline maintenance and overhaul.This paper describes the running Principle of mileage wheel, detailly analysis the reasons of the mileage wheel localization errors according problems appeared.finally, proposed methods to improve pipeline inspection robot mileage wheel localization accuracy briefly.
A Replaceable Refiner Plate and Method of Manufacture
Authors: Liang Qian Hua , Yan Shi
Published: June 2013

Replaceable refiner plate includes bars, bar-fastenings and basical plate used for refining of lignocellulosic and other natural or synthetic fibrous materials in the manufacture of paper and related products. The plate includes a pattern of bars and grooves defined by a plate cell, which is the basis of formation of the plate. A method of manufacture provides bar set based on factors including pumping angle, plate cell angle and angle of osculation. Bars and bar-fastenings with the same length are arranged in the set in a certain form.
Analysis of Finite Element and Optimization Design of Mechanical Excavator Rotary Platform
Authors: Li Jia , Kong Xiang Wei , Li Lin , Zhao Meng
Published: June 2013

The mechanical excavator is the essential equipment for open-pit mining. The rotary platform is main bearing part of the excavator, stiffness and strength are directly related to the safety of the excavator. The rotary platform of a mechanical excavator is applied as the research object. The Shell181 and Solid 95 unit are used to establish finite element model based on analyzing the structural characteristics. MPC technology is applied to solve the coupling problem of the shell and the solid element. Taking the total weight of platform as the objective function of optimization, stiffness and strength condition as constraint conditions, the section thickness of the platform main components as the design variables, the structural optimization of the platform has been completed, and the weight decrease by 6.55%. A new way has been explored to make the design of platform structure more economic and reasonable, and improve the design efficiency.
Design and Study of outside Wrapping Machine of Sewing Thread Barrel
Authors: Shi Tao , Xiu Shu Dong , He Yang
Published: June 2013

This study designs an automatic outside wrapping machine of sewing thread barrel according to analysis of manual outside wrapping technology and principle on sewing thread barrel. And it makes a design and development towards the mechanical, pneumatic and control systems of this machine. It brings positive significance for the improvements of productive effect of textile enterprises by verifying various functions with the packaging test developed by the packing production line of sewing thread bar.
Dynamic Response of SFD-Sliding Rigid Bearing Rotor -System
Authors: Wang Ji Yan
Published: June 2013

This paper establishes a linking dynamic model of SFD-sliding bearing rigid rotor system by employing Runge-Kutta method to solve dynamic question of the above systems. The study has shown: rigid rotor system can keep stable periodic motion in a certain scope with the following quasi-periodicity bifurcation.
Dynamic Simulation and Design Improvement of CVT with Diclinic Cam Plate Synchronous Revolution and Internal Power Shunt
Authors: Li Yuan , Dong Yi Xin , Huang Qiu Bo , Zhu Chen
Published: June 2013

According to the dynamic unbalance problem of CVT with diclinic cam plate synchronous revolution and internal power shunt, using structural optimization method to make high-speed rotation counterweight balance after the bearing stress distribution to achieve the best. Put forward the improvement scheme through the analysis of dynamic simulation and theory analysis. The results show that, the improved plunger structure can reduce fluctuation amplitude of bearing support reverse force when the transmission in high speed.
Electric Connecting Piece Cutting Blanking Punching Compound Die Design
Authors: Jiang Hong Yun
Published: June 2013

It analyses the electric meeting slice parts stamping process, introduces all kinds of process’s feature and points out using the piece cutting blanking punching compound to form one time with the features of these spare parts. At the same time, it introduces the mold’s structure feature and the working process, and introduces the design of punch, bump mode, incision of the punch.
Experiment Research of Two-Span Rotor-Bearing System with Rub-Impact and Crack Faults
Authors: Luo Yuegang , Zhang Song He , Wu Bin , Ma Hui
Published: June 2013

The test rig of two-span rotor-bearing system with rub-impact and crack faults was constructed. The vibration of the rotor-bearing system was observed for different conditions, such as single rub-impact fault, double rub-impact faults and coupling faults of rubbing and crack. The 3D-waterfall spectrum of rotor system was used to analyze the dynamic characteristics of the system during faults. The results indicate there appears 6-superharmonic frequency component on double rub-impact faults. The amplitudes of subharmonic frequencies decrease obviously and it of superharmonic frequencies increases on coupling faults of rubbing and crack, and the superharmonic frequency components are different obviously in different span.
Finite Element Analysis of the Shock Absorber for Vehicle
Authors: Liu Chao Fu
Published: June 2013

As for the structural features and the characteristics of fiber-reinforced rubber of a shock absorber for vehicle, this paper mainly focuses on its deformation and static characteristic analysis. A shock absorber whose type is JW2-5202 was analyzed in its performance characteristics of deformation with variations in cord elastic modulus and cord angle. According to the finite element analysis on the load vs. the displacement, and the internal pressure vs. the displacement, the results are in accordance with the test ones.
Natural Vibration Analysis for Gun Using Rigid-Flexible Coupling Multi-Body Modeling Method
Authors: Shi Yue Dong , Luo Zhong
Published: June 2013

To study the natural vibration characteristic of gun systems, the rigid-flexible coupling multi-body modeling method for gun system was developed. Using multi-body theory the rigid-flexible coupling chain structure of gun was established firstly, and the dynamic equation in closed form of gun system during launching was provided by Lagrange’s method of the second. Based on above, the analytic expressions of eigen-value equations for gun system were presented. And using that, the natural vibration frequencies of gun system were calculated, and the natural vibration characteristics were analyzed. The analysis indicates that the calculating results achieved using rigid-flexible coupling modeling method are more close to the experimental results compared to pure rigid modeling. Therefore it is essential to consider the flexible deformation of barrel if we want to acquire the natural vibration characteristic of gun system more accurately. Furthermore, the investigation in this paper also shows that the rigid-flexible coupling multi-body modeling method is an effective method for the dynamic analysis of gun system, and can be used to research the dynamic characteristic of other mechanisms as well. The model, method, and results presented in this paper have significance to correlative engineering research, and provide a new technical way for improving on the design of gun.
Numerical Analysis of the Flow in a Curved Duct
Authors: Wu Xiao Yun , Lai Shang Ding , Yamamoto Kyoji , Yanase Shinichiro
Published: June 2013

The Secondary flow in a curved duct of square cross-section, is investigated numerically using the spectral method. The walls of the duct except the outer wall rotate around the centre of curvature and an azimuthal pressure gradient is imposed. Multiple solutions are obtained at the same flow condition. It is also found that the secondary flow in a cross-section consists of two-vortex, four-vortex, eight-vortex or even non-symmetric vortex with respect to the centre line of the cross-section. The linear stability analysis for the multiple solution is also carried out to investigate the actual flow patterns.
Prediction and Analysis of Combustion Chamber Thermal Load of Heavy Vehicle at Different Altitudes
Authors: Wang Xian Cheng , Hu Jun Biao , He Xing , Guo Meng Chao
Published: June 2013

For the thermal load of a heavy vehicle is too high in plateau environment, based on Hiroyasu spray model and predictive combustion model, a turbocharged diesel engine model with environmental adaptive predictive ability was established. The experimental results of 3700m revealed that the simulation result relative errors were less than 5%. The research of combustion chamber temperature field was made. This method provides a fundamental basis for further design of the combustion chamber.
Research on Mechanical Balance of the Beam-Pumper
Authors: Wang Ling , An Hu Ping , Qi Fu Yan , Yang Tian Xing
Published: June 2013

The detailed analysis of mechanical balance based on beam-pumper is put forward to reduce the motor power, and save consumption. It has discussed something about the analysis of the crack balance, the walking beam balance and the composite balance. Finally, MATLAB M-file editor are used to compile the applications. The simulation results show that the program of the optimal mechanical balance method is feasible.
Study in Interface Appearance Design of Postal Equipment Based on Man-Machine Engineering
Authors: Sun Dao Bin
Published: June 2013

In order to systematically study the CNC machine tools panel appearance of various factors on the operating efficiency, on the basis of theoretical research in cognitive psychology, ergonomics and other design principles put forward the manmachine interface for CNC machine tools equipment operating efficiency and apply it to the improved design of the CNC machine tools panel formed for the panel color key position, key symbols single factor and combination of factors and improved design to reduce the error of CNC machine tools in operation, reduce operator fatigue and psychological discomfort, allowing more perfect, more practical CNC machine tools.
Nd:YAG Laser Welding between Ti and PET Using Pulse Shaping
Authors: Chen Yu Jiao , Guo Zhong Ning , Lian Hai Shan
Published: June 2013

PET-Ti composites have already been preliminarily used in the medical area due to the benefit of moderate biocompatibility of PET and the excellent mechanical properties of Ti. The connection of these materials always utilizes various technologies. Comparing to other methods, laser joining has the ability to achieve a clean weld and heat up materials in a spatially localized area only the material parts to be welded. This article describes how pulse shape, peak power and pulse-width affect the welding quality. And, make a conclusion that pulsed laser shapes, no matter with ramped-down waveform or ramped-up waveform, can be used to minimize the degradation of PET causes the decrease of gas bubbles that influence the bond strength and width.
Study on Vibration Friction Mechanism of Vibration Compaction System
Authors: Teng Yun Nan , Xie Li Yang , Wen Bang Chun
Published: June 2013

The mechanism model of vibration compaction system was built. The vibration friction mechanism of vibratory compaction system was studied based on granular dynamics theory. The results show that the void ratio does a great impact on strength and compaction.
The Finite Element Analysis of Double-cabin Storage Tank in Multiple Loading Conditions
Authors: Zhang Dong Sheng , Fu Su Hong , Chen Jun
Published: June 2013

In this article, the intensity of the double-cabin storage tank and subframe is simulated and calculated by the NASTRAN finite element analysis software under five different loading conditions, it provides a useful reference for similar car fuel tank design.
Optimization and Application of Secondary Cooling on 37Mn5 Steel ø210mm Round Billet
Authors: Chen Wei , Wang Bao Xiang , Feng Yong Ping , Zheng Na , Chen Ying
Published: June 2013

Aiming at enhancing the internal quality of 37Mn5 steel, a two-dimensional heat transfer mathematical model is established based on Finite Element Method. The synchronization between computing time and casting time is implemented by use of slice moving method. The reasonable of the model is verified by tested temperature. The process of solidification and shell formation is simulated for 37Mn5 steel ∅210mm round billet. The studied results indicate that: after optimization, the internal quality of billet is improved significantly; the defects such as center porosity, shrinkage cavity, intermedium cracks and center cracks were decreased obviously; defects above grade 1 were basically avoided.
Force Analysis of Pulp Fiber Particle in the Flow Field and Eulerian Two-Phase Flow Equation
Authors: Zeng Jin Song , Huang Kun , Yu Di
Published: June 2013

The forces on fiber in the low consistency pulp are studied in flow field. Eulerian model is analyzed combining with the forces to provide modified continuity equation, momentum equation and energy equation, which facilitates the flow pattern research of low consistency pulp by using of the fluid dynamics models and fluid dynamics equations.
Study on the Conversion Method of Three-Dimensional Shape Prediction Model of BGA Solder Joints
Authors: Zhao Hua Bin , Zhou De Jian
Published: June 2013

In the study of three-dimensional shape prediction of SMT solder joints, the software Surface Evolver has been widely applied as a quick and accurate effective tool for the prediction of solder joints shape. But the model it builds is not able to be directly imported into any finite element analysis software like ANSYS, and even after the import it still needs a lot of time to mend the import model. For this issue, to predict of the solder joints shape of ball grid array (BGA), the implement programs of three conversion methods of point-line-area method, axisymmetric method and infinitesimal method are given. By comparison, axisymmetric method and infinitesimal method are more suitable for the shape conversion of BGA solder joints.
Optimizations of ZnO/Si(100) with ZnO/ZnMgO Super Lattice Buffer Layers Grown by Molecular Beam Epitaxy
Authors: Jin Chang Lian , Wang Peng , Zhan Hua Han
Published: June 2013

ZnO with ZnO/ZnMgO super lattice buffer layers grown by molecular beam epitaxy on Si (100) substrates at room temperature were studied by reversing the epitaxial sequence of ZnO or ZnMgO in the super lattice buffer layers, tuning the oxygen power and the vacuum pressure. The crystal quality was improved by supper lattice buffer layers started with ZnO, using higher oxygen power, and proper vacuum pressure in the growth chamber.
A Numerical Study of Underwater Explosion Bubble
Authors: Liang Cho Chung , Teng Tso Liang , Hsu Ching Yu , Nguyen Anh Tu
Published: June 2013

The dynamical process of underwater explosion bubble is a very complicated phenomenon with many facets needed to consider. After detonation, shock wave propagates in a very short time while the oscillation of bubble occurs in a long time. Bubble pulsation can cause serious damage for the structures nearby due to the whipping effect, bubble pulse or water jet impact in the collapse phase. This paper presents an application of Finite Element Method (FEM), namely Eulerian technique, to simulate the dynamical process of bubble and numerical results were verified by an experiment. This approach shows it's feasibility in simulating the bubble pulsation as well as the formation of water jet at the end of first contracting circle. Although numerical model was simplified by the boundary conditions, the success of this method is foundation for further study of bubble such as in predicting the damages of both nearby submerged structures as well as floating structures.