bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Lateral Pressure of Bulk Materials in Silos
Authors: Chen Chang Bing
Published: February 2011

With the development of modern industry, silo diameters are bigger and bigger. Lateral pressure of bulk materials in silos is one important parameter for designing silos, which is related to the economy and safety of the structure. However, present calculation methods of the lateral pressure are mostly based on small diameter silos. For now, in the Chinese code the wall pressure computation methods are based on Rankine theory to be calculated. It is shown that the calculated results of Rankine theory may overestimate the pressure. In this paper, the lateral pressure of large diameter silos is studied. A new formula for calculating lateral static pressure on shallow silo wall is derived by static equilibrium method. The formula of this paper is simple of calculation and can be used for large diameter silos with a circular con top pile. The results agree with that of the full-sized silo experiment better than the current code.
Daily Load Forecasting Based on Combination Forecasting Techniques
Authors: Gao Chong , Ma Hai Jie , Gao Pei Na
Published: February 2011

To improve the accuracy of load forecasting is the focus of the load forecasting. As the daily load by various environmental factors and periodical, this makes the load time series of changes occurring during non-stationary random process. The key of improving the accuracy of artificial neural network training is to select effective training sample. This paper based on the time series forecasting techniques’ random time series autocorrelation function to select the neural network training samples. The method of modeling is more objective. By example, the comparison with autoregressive (AR) Model predictions and BP Artificial Neural Network (ANN) predicted results through error analysis and confirmed the proposed scheme good performance.
Design and Implementation of Single-Stage Boost Converter in Wind Power System
Authors: Hsu Yuan Yong , Lai Chuan Wen
Published: February 2011

A new boost converter without an inductor is proposed for a small-scale wind power generator system. Experiments were carried out to compare the output powers and power conversion efficiencies for the converter without an inductor and the one with an inductor. Experimental results for the converters operated at both constant resistance mode and constant voltage mode were given. It was found that efficiencies for the converter without an inductor and for the one with an inductor are essentially the same. The cost may be reduced since the inductor is not needed in the proposed boost converter without an inductor.
Synthesis and Properties of Novel Carboxylate Gemini Surfactant
Authors: Li Jie , Chen Qiao Mei , Zhang Rong Ming , Tong Wei
Published: February 2011

The novel anionic gemini surfactant, isodium salt of N, N’, N”- trilauroyl-diethylenetriamine diacetate(TDAD), was synthesized with ethylenediamine, sodium chloroacetate and lauroyl chloride by displacement reaction and acylation reaction. The results show that TDAD has fairly low critical micelle concentration (cmc) and high surface activity. The adsorption isotherm of TDAD at the interface of oil sand/aqueous solution is taken on “S” model, and the adsorption loss of TDAD is much lower than that of the traditional monomer sodium laurate (SL).
Biofilms and Safety Design Criteria for Food Equipments
Authors: Li Yan Jie , Du Bing , Li Nan Wei , Liang Jie , Yang Gong Ming
Published: February 2011

Biofilm is the most common life phenomenon for microorganisms survived in the nature, which has been recognized in recent years. It is stronger, more and more serious harm to cleared comparing with the resistance of phytoplankton microorganisms.The inside and outside surfaces of food machinery and equipment often becomes the important places for biofilm formation due to improper design flaws or cleaning method. Biofilm formation by many sorts of pathogenic microorganisms in food equipments is a serious food security risk but people are not very aware. According to current research progress on biofilm and its effect on food equipments and food safety, safety design criteria for food machinery were proposed based on food safety and hygiene, food processing technology, mechanical design theory, material science and microbial ecology, with the aim to prevent and reduce the harm of biofilms on food machinery and their products, as well as decrease potential hazards in food safety.
Cold-Model Study on Fluidized-Bed Photo-Oxidation Reactor for Shenfu Coal
Authors: Zhang Ya Ting , Wang Guang Heng , Zhao Wei , Zhou An Ning
Published: February 2011

The flow state of both the solid and gas phase in the fluidized-bed photo-oxidation reactor for Shenfu coal was studied by cold-model tests. The results showed that the appropriate pipe diameter, particle size of coal, and the coal addition for the gas-solid fluidized-bed reactor were 22 mm, 60-80 mesh, and 10g, respectively.
Numerical Analysis of Cavitation Flow during Vertical Water Exit of Underwater Vehicles
Authors: Zhang Jia Zhong , You Tian Qing , He Qian Kun , Wei Ying Jie , Wang Cong
Published: February 2011

During water-exit of underwater vehicle, the high pressure， which the local cavity collapse of underwater vehicle causes, poses a great challenge to the vehicle structure. The cavity collapse during vertical water exit of an underwater vehicle is simulated by a viscous flow solver with homogeneous multiphase flow model. The shrinkage and collapse of cavity zone and violent changes of the pressure field have been captured during the simulation. The changes of cavity shape and pressure field at different water exit velocity have been analyzed. It has been concluded that higher velocity may cause the delay of cavity total collapse and the max pressure point to transfer backwards.
Preparation and Properties of Graft Copolymer of Phenols and Starch with HRP Catalysis
Authors: Lv Sheng Hua , Rui Gong , Duan Jian Ping , Ma Yan Fen , Gao Rui Jun
Published: February 2011

A graft copolymer was synthesized by means of radical copolymerization of degraded starch, phloroglucinol(PG) and sulfanilic acid (SA) and the reaction was catalyzed by horseradishperoxidase (HRP)/H2O2. It was discussed that the effectsof monomer composition, the temperature and system pH on the graft copolymerization. The ideal copolymer was synthesized in the pH 7.0 at 30°C when the molar ratio of PG and SA was 5:6. The structure of the copolymer was characterized by Fourier Transform Infrared (FTIR) spectroscopy. Meanwhile, the graft copolymer has been used in tanning process. The retanned leather exhibits excellent increase ratio in leather thickness and good dyeing ability which indicate that the graft copolymer has retanning and assisting dyeing properties.
Research on Direction of Wet-Chemical Model of Loess
Authors: Wang Yan , Hu Yu Ding
Published: February 2011

This article analyzes the strength theory and mathematic model in the mechanical property and project feature of the loess at home and abroad since fifty years, combining with the condition and require of the engineering and brings forward easy and operational wet-chemical model to guide the actual project construction.
Electrochemical Delignification Mediated with Violuric Acid and Subsequent Bleaching of Poplar Kraft Pulp
Authors: Kong Fan Gong , Li Chen Fu , Wang Shou Juan , Fu Shi Yu
Published: February 2011

The electrochemically mediated delignification （EM）is one of new methods for pulp delignification and bleaching. In this paper, the electrochemical delignification mediated with violuric acid (VIO) of the kraft pulps were carried out. The results showed that VIO was suitable mediator for the electrochemical delignification of poplar kraf pulp. At the optimum conditions, the Kappa number was reduced from 17.4 to 11.7 and viscosity was decreased from 1144cm3/g to 1059cm3/g. The alkali treatment after EM could further reduce Kappa number and increase brightness of electrochemical-VIO treated pulp. The Kappa number of pulp treated with EME could be reduced to 8.9 with the delignification rate of 48.8% and viscosity only decreased to 1065 cm3/g. The brightness of EM E treated pulp increased from original 39.2%ISO to 50.7%. The EM treated pulps could be bleached to 80%ISO with the subsequent QP or EQP sequences at 2.0% of H2O2 charge.
Carboxylation Modification of Fiber Reclaimed from Old Newspapers and its Effects on Properties of the Reinforced Polylactic Acids Composites
Authors: Wu Yi Qiang , Li Xin Gong , Li Hui , Cheng Fang
Published: February 2011

In order to make full use of old newspapers and preserve precious plant resource, old newspapers were reclaimed and refined into fiber, then phthalic anhydride (PA) was utilized to modify the reclaimed-fiber on the condition of ultrasonic radiation. Subsequently, reclaimed-fiber was mixed with polylactic acids (PLA) to obtain composites by means of extrusion molding. At last, mechanical performances of the composite were tested. Results reveal that: composite made form PLA and the PA treated reclaimed-fiber from old newspapers has good mechanical performances, and its tensile strength is higher than 41.5MPa while impact strength is no less than 7.3KJ/m2. Moreover, the optimum processing conditions for modifying reclaimed-fiber with PA are: mass fraction of phthalic anhydride to old newspaper reclaimed fiber 5%, ultrasonic radiation time 15min, and modification temperature 90°C.
Enhancement of Gas Physical Absorption in Gas-Liquid-Liquid System
Authors: Li Wen Xiu , Xu Guang Rong , Zhang Zhi Gang , Ji Zhi Ling
Published: February 2011

The enhancement of physical absorption of CO2 in the presence of second liquid phase (dispersed organic phase) was investigated due to many important industrial applications. Gas-liquid interfacial area, volumetric mass transfer coefficient and amplification factor were calculated and discussed using penetration model. The experimental results indicated that addition of the dispersed organic phase to water leads to the increase of volumetric mass transfer coefficient by 46%, 34%, 20% for heptanol, toluene and heptane respectively. The performed in this paper shows that addition of the dispersed organic phase to water increases gas-liquid interfacial area and reduces bubble diameter. These two effects play an essential role in the rate of carbon dioxide absorption increase. The effect of enhancement could be quantified by an amplification factor.
Experiment of Carbonization for Wet-Sieving Fine Aggregate Concrete Made from Ordinary Concrete
Authors: Zhao Shun Bo , Liang Na , Ma Xiao Lu , Yang Su
Published: February 2011

The research in this paper is part of wet-sieving concrete technique for building thermal insulated reinforced concrete composite wall. The carbonized depths of fine aggregate concrete and ordinary concrete were measured by the carbonization test method. Based on the test, in standard test environmental conditions, the carbonization changes of fine aggregate concrete rely on its inherent combination changes. The lower carbonized depth takes place in fine aggregate concrete comparing with ordinary concrete, which is resulted from the increasing cement content and the reduction of grain size of coarse aggregate in fine aggregate concrete. Finally, the carbonization of fine aggregate concrete is evaluated according to the relative specification, and the reasonable service life of fine aggregate concrete is precast.
Research on Pipe-Soil Displacement Transfer Coefficient for Buried Pipeline
Authors: Zhang Xin Zhong , Han Ai Hong , Wu Zong Liang
Published: February 2011

In anti-seismic design of buried pipeline, selection of pipe-soil displacement transfer coefficient is the decisive factor for reasonable and stable analysis on seismic damage. This paper discusses calculation and selection of pipe-soil displacement transfer coefficient and related parameters, gives more definite, reasonable, simple, and reliable method of determination incorporating with existing achievements for analysis on seismic damage to buried pipelines. The results of analysis provide for anti-seismic design of buried pipelines with basis of reference.
Measurement and Evaluation of Angularity Error Based on Coordinate Rotation
Authors: Sun Yong Hou , Zhang Jing , Bao Jia Ding , Lai Ren Sheng , Huang Mei Fa
Published: February 2011

Angularity is an important parameter to evaluate the position precision. According the new generation of GPS, a new method of evaluating plane to plane angularity error based on coordinate rotation was proposed. In the process of evaluation, first the datum plane is associated by the minimum zone method; and then the datum plane is transformed into the ideal coordinate system plane. Based on the ideal datum, the plane is obtained by coordinate rotation; angularity error value is the maximum distance subtracts the minimum distance that measured points to the plane. The measurement for a V-groove in arbitrary position is performed on a three dimensional coordinates measuring machine; the result shows that angularity error can be evaluated effectually and accurately using this algorithm.
Tolerance Modeling and Optimization of XY-Table for LED Die Bonder Based on Multi-Body Systems
Authors: Huang Mei Fa , Huang Jiang Tai , Cheng Xiong , Zhang Jing , Jing Hui
Published: February 2011

High performance XY-table is commonly used in packaging equipments which needs rational tolerance to ensure its high performance requirements and low manufacturing costs. The related studies mainly focus on high speed motion control algorithms and high precision structure design. The proper tolerance is essential in the development process of new products. In this paper, a new method for tolerance optimization based on Multi-body systems is presented. The volumetric error model for XY-table is established based on Multi-body systems. And then, by identifying the basic geometric error components, the relationships between the final output precision of the XY-table and the geometry error sources are established. The tolerance optimization model of XY-table using the above relationships is presented. In this model, objective function is the total manufacturing costs and the constraints are the above relationships. By solving the optimization model, the optimal tolerances are obtained. Finally, a tolerance design example of LED die bonder is given to illustrate the proposed method.
Study on Steam Extraction Technology Assisted by Microwave of Anise Star Oil from the Fruit of Illicium verum Hook. f.
Authors: Yang Guo En , Wang Gui Wu , Wu Zhi Ping , Li Xiang Zhou
Published: February 2011

Evaluated with the yield of anise star oil, steam extraction method assisted by microwave is studied for the extraction of anise star oil from Illicium verum Hook. f. in contrast with the traditional steam distillation (SD) method in this paper. The new optimal steam extraction technology assisted by microwave of anise star oil is obtained as: extracting time 80 minutes, solid-liquid ratio(g/mL) 1:7, size of material 80~100 mesh and extracting temperature 80°C. Average yield of anise star oil is up to 11.6% (g/g) under the above technology. Size of material is the most important influencing factor in the extraction process. The optimal traditional steam distillation technology is: extracting time 120 minutes, solid-liquid ratio(g/mL) 1:6, size of material 80~100 mesh and extracting temperature 100°C , the average yield of anise star oil is only 9.81% (g/g). The steam extraction technology assisted by microwave has advantages in both the technological conditions and the yield of anise star oil than the traditional steam distillation technology.
Research on Network-Based Intelligent EDM CAPP System
Authors: Zhao Jin Zhi , Liu Yuan Tao
Published: February 2011

A framework for building network-based EDM CAPP system using intelligent technology to support organizations characterized by physically distributed, enterprise-wide, heterogeneous intelligent manufacturing system over Internet is proposed. Expert system theory is introduced. Rule-Based reasoning and Case-Based reasoning method are introduced to reason EDM method. Genetic Algorithm is applied to optimize EDM technological parameter. Fuzzy reasoning algorithm is applied to select technological data. Artificial Neural Network is applied to forecast technological effect. Internet environment and Technological knowledge database modules are introduced. Instances are also introduced to testify feasibility.
Application of Experimental Design and MPI Technology in Injection Molding Parameters Optimization
Authors: Hu Yong , Xie Wen Ling
Published: February 2011

To optimize injection molding process, the gating system, cooling systems and related injection molding process parameters are chosen as the experimental analysis factors, the quality of the injection as the experimental index in this paper. First, design the test program with orthogonal experimental and simulate with Moldflow MPI 6.0. Second, after plastic molding, in order to determine the integrated target, the comprehensive evaluation method of fuzzy mathematic is used to evaluate warpage values, shrinkage and residual stress. Finally, get the optimization scheme and the best match of gating system and cooling systems though the range and variance analysis of integrated target. The experimental results shown this optimization method can achieved the best parameters for practical produce. So, the optimization injection molding method, MPI and experimental design based, has important practical significance.
Simulation of End Milling for Weak-Rigidity Structural Parts of Aluminium Alloy in Aviation
Authors: Fu Chun Lin , Wang Cong Kang , Li Tie Gang , Wang Wan Shan
Published: February 2011

To resolve the problem of the parts deformation because of the milling force, a finite element model (FEM) of end milling process simulation in milling force field was established. On the base of FEM, we simulate the high-speed end milling type structure of aluminum alloy 7075 parts. We successfully predict the end milling force, obtain the effect between the upper and lower material to the milling force, and Mises stress and the tool length beyond the part.The simulation results show that the lower material can increase the milling force to upper, and upper material can decrease milling force to lower layer.The drilling tool length beyond the part is about 0.5 mm .
Thermal-Mechanical Couple Analysis for a Piston of Oil Engine Based on ANSYS
Authors: Li Hui
Published: February 2011

Research on thermal and mechanical distribution of a piston under working condition was performed by using indirect couple method. It is shown that the highest temperature is within the permit and piston ring sticking will not happen. At the same time, the largest stress bellows allowable stress of the material, so the piston can meet the requirement. Also, the result in this article provides reference for piston design and optimization.
The Numerical Study of Oil Drop Jet from Oil-Air Lubrication Nozzle
Authors: Wang Jin Li , Li Li Quan , Cai Lin
Published: February 2011

Nozzle is an important part of oil-air lubrication system. This paper uses Computational Fluid Dynamics (CFD) software FLUENT to study the flow field of oil air, and different air pressure and nozzle throat size are discussed. The results show that: When air pressure is increased from 0.05Mpa to 0.1Mpa, the maximum diameter (2mm) percentage reduces, but the diameters distribution is almost unchanged as the air pressure is increased to 0.3MPa. The throat diameter is decreased, the mean Sauter diameter of oil drop reduces. This paper will provide a theoretical basis for oil-air lubrication nozzle design and selection.
Formation Pressure Analysis of Water-Bearing Tight Gas Reservoirs with Unsteady Low-Velocity Non-Darcy Flow
Authors: Song Hong Qing , Yue Ming , Zhu Wei Yao , He Dong Bo , Yi Huai Jian
Published: February 2011

Porous media containing water is the prerequisite of existence of threshold pressure gradient (TPG) for gas flow. Based on theory of fluid mechanics in porous medium considering TPG, the non-Darcy flow mathematical model is established for formation pressure analysis of water-bearing tight gas reservoirs. It could provide semi-analytic solution of unsteady radial non-Darcy flow. According to the solution of unsteady radial non-Darcy flow, an easy and accurate calculation method for formation pressure analysis is presented. It can provide theoretical foundation for development design of water-bearing tight gas reservoirs. The analysis of calculation results demonstrates that the higher TPG is, the smaller formation pressure of water-bearing tight gas reservoirs spreads. In the same output, the reservoir sweep of non-Darcy gas flow is larger than that of non-Darcy liquid flow. And the pressure drop near wellbore is smaller than that of non-Darcy liquid flow, which is different from Darcy flow.
Spheroidization Modification of Artificial Graphite Applied as Anode Materials for High Rate Lithium Ion Batteries
Authors: Wu Yu Shiang , Yeh Tzuo Shing , Lee Yuan Haun , Lee Yu Chi
Published: February 2011

Rate capability tests showed that artificial graphite after spheroidization treatment exhibited a higher capacity in the higher C-rate region (2~10C) at a 0.1 C rate charge and variable C-rates discharge. Artificial graphite after spheroidization treatment exhibited a higher capacity in the higher C-rate region (0.5~9 C) at the same C-rate charge and discharge. These results show that artificial graphite after spheroidization treatment has a large amount of isotropic microstructures that lithium ions can intercalate into the graphene layers from all directions via edge-plane surfaces. Therefore, the artificial graphite is more suitable than natural graphite for the anode materials of high rate batteries.
Compensation Effects Analysis of Adaptive Optical System Based on Space Laser Communications
Authors: Zhang Hong Tao , Zhai Xu Hua
Published: February 2011

The effects of atmosphere turbulence on optical beams transmitting in space laser communication system were analyzed by using sixty-one units adaptive optical system in the paper. Laser communication systems from low earth orbit planet to ground station were imitated by way of optical design software. In addition, the compensating results, experimental phenomena and data based on adaptive optics were also analyzed.
Design and Research on the New Combining Vibrating Screen
Authors: Guo Nian Qin , Lou Hong Min , Huang Wei Ping
Published: February 2011

Basing on the traditional vibrating screen with double amplitudes and different frequency, a new type vibrating screen called combining vibrating screen is developed. It consists of two vibrating screen units. Each unit has an independent vibration exciter, realizing that one screen unit has a parameter of high-frequency with small-amplitude while the other screen unit has a parameter of low-frequency with large-amplitude. The two screen units are installed at different obliquities, so that the equal thickness screening principle can be realized. And comparing with the traditional vibrating screen, its screening efficiency and capacity are greatly improved. This new kind vibrating screen is especially suitable for the dry screening to moist particles.
Design and Application of Flexible Auxiliary Haulage System for Material Supply in Underground Coal Mine
Authors: Chang Ju Cai , Chen Qing Hua
Published: February 2011

In view of the problems existing in the present transportation ways of coal mine, a kind of new auxiliary haulage system has been designed, which can achieve the going there and back transportation only by using one winch in the multi-slope and undulating roadway. And according to the requirements of safety production of coal mine, the non-wheeled supply mine car without anti-car device and the safety interlock system of wheeled supply mine car have been designed. Meanwhile, finite element analysis software is adopted to check and analyze the locking pawl strength of the safety interlock system with wheeled supply mine car. The analyzing result shows that the locking pawl can completely stand the impact loading when the mine car sliding down. The haulage costs and the occurrence of security incidents have been reduced when the designed system is applied to coal mine. Engineering practice shows that the good results have been achieved.
A Feature-Based CAD-CAE Integrated Approach of Machine Tool and its Implementation
Authors: Niu Wen Tie , Wang Peng Fei , Shen Yu , Gao Wei Guo , Wang Li Na
Published: February 2011

An analysis feature-based CAD-CAE integrated approach was proposed to solve the problems of rapidly CAE modeling for static and dynamic analysis process of machine tool. Firstly, analysis features were defined in CAD system and analysis feature library was constructed for machine tool and its structural components. Secondly, analysis feature model was constructed by attaching analysis feature to CAD model interactively. Finally, ANSYS parametric design language (APDL) file was generated automatically by mapping analysis features to APDL codes, which realized the integration of CAD system and ANSYS system. Based on application programming interface (API) of SolidWorks, a parametric CAD-CAE tool oriented to static and dynamic analysis of machine tool was developed, which realized parametric modeling and automatic analysis of machine tool and improved design efficiency and quality of machine tool.
Optimization on Motion Errors of Ultra-Precision Machine Tools Based on Multi-Body System and Monte Carlo Simulation
Authors: Li Tian Jian , Chen Shi Jin , Cheng Kai
Published: February 2011

Numerical optimization method is increasingly applied into the design of machine tools so as to improve their performance. This paper employs Monte Carlo optimization method to predict and reduce the errors of ultra-precision machine tools in term of motion errors between cutting tool and workpiece closely associated with machine processing of ultra-precision machine tools. Using a quite different origin position of location coordinate system from traditional in that every ideal frame on current body is coincided with the reference actual one on the adjacent body, the motion errors are expressed in homogeneous matrix defined with adjacent bodies’ residuals in multi-body system analysis. This expression clearly shows that the final position errors are decided by the motion accuracy of the guideline, and gesture errors are affected by accuracy of the spindle assembly. With geometric errors extracted from the matrix, a new optimization method of error allocation is presented to maximize the machine precision by reasonable distribution of tolerances key parts. Using variables intimately related to motion errors and under constrained by cost, optimization model is established, then it is solved with Monte Carlo simulation method to compute top ten key factors contributed to errors and obtain distribution probabilities of both position error and gesture error. Case study formulated is reported to illustrate the method proposed and to evaluate its effectiveness.
Test Study and Development of High Energy Direct Ignition System for Electronic Control CNG Engine
Authors: Chen Qi Ping , Shu Hong Yu , Shi Chong Huai
Published: February 2011

According to the requirements of heavy commercial compressed natural gas (CNG) vehicle to satisfy China’s rapid economic development, the authors develop and test a new high energy direct ignition system of heavy CNG engine. Hardware and software of the high energy direct ignition system are designed and debugged. Based on the tradition test bench, an optimal test bench for this CNG engine is established. Ignition advance angle is calibrated and analyzed, which has the economy and power performances effects on CNG engine matched the developed high energy direct ignition system. To test the effects on engine emissions by high energy direct ignition system, ignition control strategy is simplified and optimized. In addition, high ignition energy is directly determined by current time of ignition coil power. A test study about torque, power and fuel consumption of this engine is accomplished. The final test results indicate that this developed high energy ignition direct system can satisfy the comprehensive performance objectives of heavy CNG engine.
Simulation of Failure Detection Based on Neural Network for No-Ball Mill
Authors: Li Kun Shan , Wang Xin Hua , Wang Wen Ming
Published: February 2011

According to the structural characteristics of non-ball mill, using the neural network theory to select and measure point, set the failure mode, analyze and determine the cause of malfunction. The newly developed fault detection system was used to simulative detect fault. Through data processing, the results can be directly derived which could be fed back into the design of non-ball mill, thereby improving the design.
A System of Selective Non Catalytic Reduction of NOx for Diesel Engine
Authors: Xu Bo Yan , Tian Hai Ying , Yang Jie , Sun De Zhi , Cai Shao Li
Published: February 2011

SNCR (Selective Non Catalytic Reduction) system is proposed, with 40% methylamine aqueous solution as reducing agent to reduce NOx in diesel exhaust gas. The effect of injection position and volume on the reduction efficiency through the test bench is systematically researched. A three-dimensional model of a full-sized diesel SNCR system generated by CFD software FIRE is used to investigate the reduction efficiency under different temperatures. The simulated results have a good agreement with the test results, and it can be used to optimize SNCR system. The results can indicate the practical application of this technology.
Finite Element Analysis of the Stress on Cylinder of the Fluidized Bed Reactor for Fast Pyrolysis
Authors: Xie Qing Ruo , Sun Yi , Zheng Li Wen , Wang Hu Qi , Tong Zhang Fa
Published: February 2011

A new experimental fluidized bed reactor was investigated and designed which has been widely utilized for fast pyrolysis under different temperatures (T=727–973 K).The stresses of the reactor cylinder are analyzed using finite element method(FEM, ANSYS Inc., U.S.A ) based on the safety assessment, and the cylinder is designed for installing scheme. The result of ANSYS analysis shows that the stress unstable positions are nearby both ends of the cylinder. The results of analysis are shown that the designing stresses are not beyond the allow able ones. So the designing parameters can possess sufficient reliability, and the design scheme can completely satisfy the strength requirement. Certainty of the stress could offered the valuable instruction for the application of the equipment on industrial scale-up.
Separate Mapping and Application in Data Share for Network Manufacturing
Authors: Song Jin Ling
Published: February 2011

EXPRESS-to-XML mapping is an indispensable foundation in manufacturing network data transmission and share. Put forward and construct a networked manufacturing system with synergy based on the whole life manufacture cycle of the products and the manufacturing information share. Stress is on the mapping mechanism from the standard description language of STEP_NC——EXPRESS to XML，presenting the separate-mapping method with which according to the function and feature of the information to be transmitted and shared, the physical file of STEP_NC is divided into general information structure elements, feature information structure, and operating information structure, realizing the optimally comprehensive mapping with the early binding and the late binding. Build up STEP_XML conversion system. Example is given for component with a hole in running the separate mapping method on the STEP - NC Machine simulation platform. It has been shown that the conversion system and the separate-mapping method are practical and efficient.
Surface Roughness Prediction of High Speed Milling Based on Back Propagation Artificial Neural Network
Authors: Hu Jin Ping , Li Yan , Zhang Jing Chong
Published: February 2011

Prediction of surface roughness is an important research for machining quality analysis. In order to predict surface roughness in machining, increasing productivity under ensuring milling, the artificial neural network is introduced into milling area. To build high-speed milling surface roughness prediction model using BP neural network. Prediction results are compared with experimental value, which shows that this method can achieve better prediction accuracy. It has certain significance for parameters selection of high-speed milling and quality control of the surface.
Aviation Equipment Maintenance Job Card Generation Method Based on Lightweight Model
Authors: Geng Jun Hao , Tian Xi Tian , Jia Xiao Liang
Published: February 2011

To improve the accuracy of description and the clarity degree of guiding of aviation equipment maintenance job card, the method of maintenance job card generation based on lightweight model was proposed. This method applies multi-view 3D annotation method to implement the separation show for technical requirements from different maintenance discipline and operation timestamp, uses dynamic viewpoint navigation method to make the show of disassembly and assembly simulation process of parts conform to the observation habit of human, finally, transforms the maintenance order information into 3D portable job card file based on lightweight model and releases it to maintenance site. The maintenance application instance of right aerofoil shows that this method can realize the accurate, intuitive and non-ambiguous description, increase the efficiency and quality of maintenance.
Model of Collaborative Knowledge Innovation with Distributor Participation in Supply Chain
Authors: Zhang Xu Mei , Shen Na Li , Mao Xiao Ping
Published: February 2011

Considering the influence of distributor participation, collaborative knowledge innovation is studied by building the game model from the decision-making viewpoint of manufacturer. Changes of market demand due to the collaborative innovation and the behaviors of participators are also analyzed. The results show that distributor participation can spur manufacturer to increase product innovation investment and be available to realize the higher level of innovation, and that the degree of distributor participation is not only affected by its own cost of the collaborative innovation, but also the investment of manufacturer. Furthermore, the research gets the boundary condition of different decision selection for manufacturer and its distributor.
PRO/E Based Parametric Design of Spur Gears
Authors: Feng Fang , Pan Hui , Hu Guo Jun
Published: February 2011

This paper adopts the method of PRO/E programs, relationships and parameters to conduct the parametric design process for various types of spur gears, analyzes the key parameters of the spur gears, defines them via programming, and by the use of parameters dialog box and relationships dialog box to define basic parameters and the relationships between them step by step, finally to complete the gear’s parametric model.
Influence of Radial Position of Medium Size High Voltage Asynchronous Motor Stator Ventilation Channel Peri-Axle Terminal on Fluid Flow Pattern
Authors: Wen Jia Bin , Yan Hong Yu
Published: February 2011

Fluid flow inside radial ventilation duct is one of important facts which to decide the effect of ventilation and cooling, there is important significance to investigate.In this paper,according to the theory of Computational Fluid Dynamic(CFD),a YKK400-6、690kW medium size high voltage asynchronous motor was taken as an example.Created its 3D stator and rotor radial duct physical and mathematical model,basic assumptions and boundary conditions are determined according to CFD theories.The fluid fields are calculated and analyzed,and fluid field distribution inside radial ventilation duct is shown.Base on the length of the stator ventilation channel as a constant,changing the radial position of the stator ventilation channel peri-axle terminal,and the fluid flow characteristics are shown when the radial position was changed.Analyzing the fluid flow characteristics on either side of the stator winding,and obtaining the influence of the radial position of the stator ventilation channel peri-axle terminal on fluid flow characteristics.The results provided theoretical basis for the optimization design of motor ventilation system,and those paved the way for solving temperature field based on coupled field.
Study on Trustworthy Interaction-Chain of Human-Information System in Distributed Cooperative Manufacturing Environment
Authors: Zhang Lin , Yi Shu Ping , Zhao Run
Published: February 2011

In order to solve the problem of untrustworthy interactive process in distributed cooperative manufacturing environment, we proposed a method combining intelligent agent and interactive Process Control. The method inserts a trustworthy interaction management layer between users and information system. The management layer includes 5 agents. Interaction agent and negotiation agent track and collect data of interactive behavior; monitor agent maintain global clock to guaranty temporal consistency; assessment and analysis agent used for determining whether abnormal interactive behaviors; and feedback agent used for giving user prompt and early warning. To use this method, we constructed a trustworthy interaction chain of human-information system based on intelligent agent technology. Due to the each link of the chain is monitoring and managing by the management layer, the trustworthiness of interaction process is guaranteed.
Design of a CAM System for End Mills Based on Solid Modeling
Authors: You Zhan Hua , Tang Fei , Li Shu Zhe , Yue Xiao Feng , Wang Xiao Hao
Published: February 2011

To facilitate the manufacturing of an end mill, this paper presents a manufacturing model of a flat-end mill using a five-axis computer numerical control (CNC) grinding machine. Using input data of end mill geometry, wheels geometry, wheel setting and machine setting, the NC code for machining will be generated directly from a solid modeling then used as input to simulate the end mill machining in 3 Dimension before machining. The 3D simulation system of the end mill grinding is generated by VBA and AutoCAD2008. Machining simulation consists of a sequence of Boolean operations on difference between the tool and the grinding wheels through NC code. Then the major design parameters of a cutter, such as relief angle and inner radius, can be verified by interrogating the section profile of its solid model. The manufacturing model presented in this paper provides a practical and efficient method for developing CAM software for the manufacture of an end mill.
Study on the Computer Numerical Control Process of Variable Pitch, Groove Depth and Groove Width Screw
Authors: Han Min , Li Shan , Deng Lu Tao
Published: February 2011

The article introduces three design techniques of variable pitch & groove depth & groove width screw. We found parameterized mathematical model of the type of heterotypic screw by analyzing and computing. Then it can realize to CNC machining of variable pitch & groove depth & groove width screw on lathe.
Complex Products Remote Collaborative Design and Implementation of its Flexible Flow
Authors: Wu Xiong Xi , Gao Qi Feng
Published: February 2011

Based on the core of knowledge acquisition for acquiring or providing knowledge services, remote collaborative product design system provides a virtual enterprise collaborative design patterns. The paper analyzes the open design system for the remote collaborative design, and studies the decision-making flow and its strategy for the distributed collaborative complexity product design. Take multi-degree of freedom manipulator systems design as object, the management and its implementation process methods of the remote collaborative design system for the complex product collaborative design is discussed.
Building of Mechanical Components Ontology in the Networked and Collaborative Environment
Authors: Zeng Qing Liang , Qin Lei , Wang Cheng Long
Published: February 2011

Different with the traditional expert classification of building ontology, Web-platform folksonomy is used to analyze the tagging of mechanical components in the networked and collaborative environment. And according to the combination of tags of mechanical components and ontology technology, the ontology model is given based on one instance by protégé to reveal the information characteristics of mechanical components more realistically and more completely. With the trend of realization of manufacturing informationization, the mechanical components ontology provides a contribution to the communication, sharing and knowledge reusing of mechanical products.
The Interpolation Algorithm of Feed Rate Control Based on Trigonometric Acceleration-Deceleration and Machine Dynamics Conditions
Authors: Jiang Lei , Ding Guo Fu , Xie Bin Bin , Wang Jian Min
Published: February 2011

According to the requirements of high-speed machining, the feed rate control algorithm based on the acceleration-deceleration control and dynamics conditions is proposed. This algorithm not only satisfies the continuity of displacement, feed rate, acceleration and jerk of the feed movement, but also meets the dynamics condition of high-speed machining. Furthermore, the algorithm is applied to NURBS curve interpolation and optimizes the acceleration-deceleration intervals. At last, the algorithm is verified by simulation. This interpolation algorithm of feed rate control reduces the impact, machine vibration of feed, and improves the surface accuracy and quality of high-speed machining.
Fault Diagnosis System for Large-Scale Equipments Based on Hybrid Reasoning
Authors: Chen Ming , Zhang Rui , Li Ying Lei
Published: February 2011

Because of their complex structures, diverse functions, and cross-correlation among subsystems, the fault of large-scale equipments occurs easily, but its trouble shooting is difficult. Firstly, a hybrid reasoning method is proposed, and the framework of fault diagnosis system is constructed according to characteristics of case based reasoning (CBR) and rule based reasoning (RBR). Secondly, CBR and RBR applied to fault diagnosis for large-scale NC equipments are analyzed. In RBR process, the fault tree was obtained by reachability matrix, and the rules knowledge is automatically generated by fault tree, so the bottleneck of acquiring rules knowledge is solved. Lastly, this method is used in the fault diagnosis of certain large-scale NC equipment, which verifies the validity of the method.
Researches on Image Processing Technology Used in Bamboo Weaving Machine
Authors: Zhang Lei , Gao Hong Li , Xu Ming Heng , Xiao Shi De , Du Peng
Published: February 2011

A new bamboo weaving machine, in which automatic control system is employed, is introduced in this paper. The system deals with the images firstly, and then controls bamboo weaving by means of electromotor and transmission devices. Different algorithms, such as lift wavelet, bivariate rational interpolation and Ostu are used in image processing. The minimum width of the bamboo filament is 0.7mm. The maximum number of the bamboo filament in the warp and weft direction is 360 and 430 respectively. Various beautiful bamboo artware can be weaved automatically by this machine in a short time.
Overall Design of the Forming System for Squeeze Casting
Authors: Deng Jian Xin , Shao Ming
Published: February 2011

As a forming process, squeeze casting is completed in the corresponding manufacturing system. The paper deals with the overall design of the manufacturing system-the forming system for squeeze casting. To construct a practical manufacturing system for this technology, the forming control process of squeeze casting is analyzed, where the key factors are identified to determine the production quality. Then the design principles for the forming system for squeeze casting are built and its functional requirements are attained. And an overall structure for this forming system is presented including the die design system, the design and management system of process parameters and the squeeze casting equipment system. This structure decreases the difficulties and the cost of building the physical system.
Paper Cutter Fuzzy-PI Speed Control Based on PLC
Authors: Zhang Rui , Song Le Peng , Yang Jun Ling , Zhou Jun
Published: February 2011

This paper presents a compound fuzzy control algorithm method having modifiable factors based on PLC, and the modified fuzzy controller and PI regulator is realized by PLC, the system solves problems of imprecise paper cutter speeds, instability, and paper cuttings of different lengths. The results show that the system can effectively restrain influences from pure time-delays while maintaining stability and strong robustness.
The Finite Element Analysis of Two Line Types of Three-Thread Single-Screw Pump
Authors: Wu Jun Fei , Gao Wei
Published: February 2011

In order to find out the advantages and shortcomings of two line types of three-thread single-screw pump, the comparative analysis method is initially used on the same kind screw pump of different line types .By using ANSYS，this paper adopted the finite element analysis to analyze the deformation、stress and strain of outer equidistant curve of curtate hypocycloid and inner equidistant curve of curtate epicycloids two line types three-thread single-screw pump under uniform pressure and 1MPa differential pressure .It focuses on discussing over the rubber stator of screw pump suffers influenced by the above three factors. The result shows that the existence of uniform pressure makes an uniform radial displacement of the rubber stator; the 1MPa differential pressure makes a great deformation of the rubber stator and the value of stress and strain also increases accordingly, by comparative analysis of two line types of three-thread single-pump, the sealing property of outer equidistant curve of curtate hypocycloid three-thread single-screw pump takes more advantages rather than inner equidistant curve of curtate epicycloids three-thread single-screw pump.
Anti-Perturbation Kalman Filter Based on Perturbation Theorem and Multiple Hypothesis Testing Theory
Authors: Deng Zhong Liang , Fang Ling , Zhu Yu Jia , Liu Wen Long , Xu Lian Ming
Published: February 2011

In this paper, an improved Kalman filter algorithm was proposed by two kinds of anti-perturbation method which were derived according to the perturbation theorem of inverse matrix. Furthermore, direction-correcting has been merged into this algorithm by using multiple hypothesis testing theory which can detect the current direction of a target. Experiments which were based on indoor positioning have shown that the improved algorithm(named IKF) has great performance.
Method of Adaptive Wavelet Thresholding Used in Image Denoising
Authors: Huang Hui Xian , Gong Juan , Zhang Te
Published: February 2011

According to multi-resolution analysis of wavelet threshold denoising principle, this paper presented two improved algorithms of continuity and adaptive threshold based on hard thresholding. The soft thresholding (hyperbolic thresholding) was used in the intervals after setting two thresholds, and the isolated points were removed according to the adjacent correlation coefficient during the processing. As a result, the hard thresholding’s shortcomings were reduced. The simulation results show that improved algorithms have both better visual effect and PSNR than the traditional approaches.
Research on Plug and Play Sensors Based on IEEE1451.4
Authors: Tang Xu Hui , Wang Jing , Hou Pei Guo
Published: February 2011

The IEEE1451.4 is a new standard for plug and play sensors.The standard defines a mechanism for self-description and self-indentification for the traditional analog sensors.The mechanism reduce the time for configuration and diagnosis greatly.Introduce IEEE1451.4 and IEEE1451 other standards.The structure and model of the IEEE1451.4 sensors are analyzed.TEDS(Transducer Electronic Data Sheet) that contains the information of sensors and MMI(Mixed-Mode Interface) that transfers both digital signals and analog signals are carried on reseach in detail.