bluuebunny/crossref_metadata_2025 huggingface dataset:
Viscous Behaviours of Feedstocks for Micro MIM
Authors: Cheng Zhi Qiang , Quinard Cedric , Kong Xiang Ji , Barriere Thierry , Liu Bao Sheng , Gelin Jean Claude
Published: August 2011

The viscous behavior of feedstocks plays the crucial role in Micro MIM. It affects directly injectability of the components and finally quality of the sintered component, because of the possible segregation induced by injection. The studies on viscosity of the feedstocks are realized by a series of the tests, in which a torque rheometer and a capillary rheometer are employed. The effects of binder composition, powder size, temperature and powder loading in volume on viscosity of the feedstocks are investigated. The mixtures of three kinds of binder composition, mixed with 5µm or 16µm 316L stainless steel powders, are evaluated. The best binder composition is determined by comparison of the viscous behaviors among the self-mixed feedstocks and the commercial one. It results in the suitable ranges of heating temperature and powder loading in volume for the feedstocks. The critical powder loading in volume is determined by a series of the capillary tests with the gradual increase of powder loading. These works provide the valuable reference for the research on binder composition and the process of micro metal injection molding.
Effect of the Process Parameter on as-Cast 30Cr2Ni4MoV Steel Soundness during Cogging
Authors: An Hong Ping , Liu Jian Sheng , Wu Jian Guo
Published: August 2011

As-cast 30Cr2Ni4MoV steel was researched quantificationally to obtain the distribution and pattern of the microcosmic defect. By means of finite element simulation and experiment research, porosity consolidating and relative density evolution of as-cast 30Cr2Ni4MoV steel were investigated for a FM stretching process at a constant strain rate 0.001s-1. The studied parameters included three temperatures (800°C, 1000°C, 1250°C) and three deforming passes(1,2,3) and three friction factors(0.3,0.5,0.7), which bracketed the parameters that were used during most primary break-down processes. Temperature had an obvious effect on the porosity consolidating, but friction factor had no effect on the ultimate soundness nearly. When beginning temperature was 1250°C and heat exchanged considered, initial porosity can be eliminated after the accumulated effective strain reached 1.0 at least. The residual defect of the wrought material at different strain lever was compared to the initial defect of as-cast material and found to be somewhat reduced. The impact toughness of the wrought material at different strain lever was also compared to the as-cast material and found to be obvious improved. The difference in these behaviors between as-cast and wrought material could be attributed to the healing of the porosity defect and the enhancement of the soundness at a certain extent.
Exploration on Shape of Profiles Determined by Chord Angle Control Method
Authors: Ling Ling , Zeng Yuan Sheng
Published: August 2011

Through compassion of relative merits of the existing two control methods of straighten anti-curve line and chord line measure for cold-formed profiles, a three-pivot chord angle control method of non-endpoint measurement was proposed in this paper, and its feasibility was proved by using mathematical deduction. Using mapping method, the forming of profiles can be controlled by the only one set of orderly array chord angles and chord lines obtained by a spline curve of profiles, and meanwhile, the length of automation feedstock in forming process of profiles was explored. The present research achievements can provide a good theoretical basis for the further application on controlling profile forming with the chord angle measurement.
An Orthogonal Experimental Analysis of Electrical Discharge Machining of Particle Reinforced Metal Matrix Composites with Concavo-Convex Electrode
Authors: Liu Jiang Wen , Chen Guang Xue , Yue Tai Man , Guo Zhong Ning , Wan Zi Yao
Published: August 2011

A new concavo-convex electrode has been designed and employed and it was reported that electrical discharge machining (EDM) of particulate reinforced metal matrix composites with this kind of new electrode can accelerate the debris discharge during machining so that it has a higher material removal rate (MRR) compared to the case where a normal electrode was employed. Since there are many factors that can affect the MRR in the EDM process with the concavo-convex electrode, in order to determine which is the most important factor and to optimize the machining parameters, the relative importance of the various cutting parameters on material removal rate was established using an orthogonal experimental analysis in this study. The results of the analysis suggest that to achieve a high MRR for particulate reinforced aluminum 6061 with 10-vol% Al2O3 (10ALO) or 20vol% Al2O3 (20ALO) using a concavo-convex electrode, the duty cycle is the most influential factor among current, pulse duration and duty cycle.
Refined Numerical Simulation and Experimental Investigation on Arc Welded Joints of 6061 Aluminum Alloy
Authors: Liu Qiang , Li Jing Bing , Zong Zhi Jian
Published: August 2011

In order to improve the simulation accuracy for arc welded structures, the refined numerical simulation approach using the solid model with material mechanical properties has been presented. The arc welded joints are frequently utilized in the manufacture of neighborhood electric vehicle. Firstly, the mechanical properties of the base metal and three types of welded joints were determined by the uniaxial tensile experiments, and experimental results revealed that the mechanical property significantly reduced after welding. Then the numerical simulation approach using solid model and approach using weld constraint were conducted on the butt welded joints of 6061 aluminum alloy in LS-DYNA software, the simulation results were compared with experimental results. Moreover, the refined simulation approach using solid model was validated by different types of arc welded joints and their corresponding experiments. It is concluded that the proposal simulation approach using solid model shows higher accuracy than the approach using weld constraint on predicting deformation of butt welded and fillet welded joints.
Turning Process Modeling and Cutting Force Investigation Based on Finite Element Analysis and Cutting Experiments
Authors: Cao Yan , Chen Hua , Zhao Hai Xia
Published: August 2011

On the basis of metal cutting and rigid-plastic finite element theories, taking cutting force in turning process as the research object, a FEA model for turning process using a MDT cutter on a centre lathe CA6140 is constructed to simulate its metal cutting process. Using Deform 3D, cutting forces are calculated according to different cutting parameters. The influences of the cutting parameters on the cutting forces are investigated. In order to validate the FEA model, cutting experiments are conducted. Comparison between simulated cutting forces and experimental forces shows similar trends and reasonable agreement.
Changes in Elastic and Viscoelastic Properties of Poly(Methyl methacrylate) by Physical Aging
Authors: Luo Wen Bo , Wang Chu Hong , Liu Xiu , Shen Qiang
Published: August 2011

The influence of physical aging on mechanical properties of glassy polymers was investigated in this paper. After annealing above Tg to release the previous thermal and stress history, the polymethyl methacrylate (PMMA) samples were quenched to 27°C, aged for various times (ta), and were then stretched at the same temperature by two ways: (1) step stresses with four different magnitudes varying from 15MPa to 30MPa; (2) constant rate stretch up to fracture. The physical aging effect was monitored by measuring the initial instantaneous elastic modulus (E) and the fracture strength (σf) from the stress-strain curves as a function of ta up to 1368h. It is shown that both E and σf of the material increase with aging time and approach to their asymptotic values, which satisfy the KWW rule, while the isochronous creep compliance decreases with log ta in a linear manner within the aging time range considered in this paper.
Sheet Metal Forming Limit Prediction with Maximum Thickness Reduction Ratio
Authors: Chen Jie Shi , Chen Jun
Published: August 2011

Maximum thickness reduction ratio is used to predict sheet metal forming limit in the numerical simulation of forming process. The maximum thickness reduction ratio under different stain path is not a constant for the same material. The effect of strain path and strain hardening exponent on forming limit is considered. The relationship between the maximum thickness reduction ratio that the material can obtained and the strain path between tensile to equi-biaxial is established. The parameter in the criterion can be determined by tensile experiment combined with numerical simulation of the same forming process. Then the limit strains under other linear strain paths between tensile to equi-biaxial can be determined by the criterion combined with numerical simulation of corresponding forming process. Forming limits of three kinds of sheet metals are predicted with the modified maximum thickness reduction ratio criterion. Good agreement is achieved between the predicted data and the experimental data.
Applications of Bragg Grating in Strain Measurement of Electromagnetic Railgun
Authors: Gu Jin Liang , Luo Hong E , Li Jian Xin , Xia Yan , Li Bao Ming
Published: August 2011

A kind of strain measurement system of electromagnetic railguns based on Bragg Grating technology was introduced in this paper. The Bragg grating strain measurement system of electromagnetic railguns was designed. The data processing and the calibration of the measurement system were discussed. The experiments of strain measurement in electromagnetic launch were accomplished. The results show that the Bragg grating strain measurement system can work reliably in strong electromagnetic interference, which satisfied the special demand of anti- electromagnetic interference for the strain measurement system.
Video Nodes Based Collaborative Object Localization Framework in Wireless Multimedia Sensor Networks
Authors: Lin Qing Tao , Zeng Xiang Bing , Jiang Xiao Feng , Jin Xin Yu
Published: August 2011

This paper establishes a 3-D localization model and based on this model, it proposes a collaborative localization framework. In this framework, node that observes the object sends its attitude information and the relative position of the object's projection in its camera to the cluster head. The cluster head adopts an algorithm proposed in this paper to select some nodes to participate localization. The localization algorithm is based on least square method. Because the localization framework is based on a 3-D model, the size of the object or other prerequisites is not necessary. At the end of this paper, a simulation is taken on the numbers of nodes selected to locate and the localization accuracy. The result implies that selecting 3~4 nodes is proper. The theoretical analysis and the simulation result also imply that a const computation time cost is paid in this framework with a high localization accuracy (in our simulation environment, a 0.01 meter error).
The Digital Quality Evaluation System of Elbow Flowmeter
Authors: Liu Wei Min , Zheng Ai Yun , Huo Ping , Lu Chun Guang
Published: August 2011

The quality of elbow flowmeter is important to its application accuracy. This paper described the digital quality evaluating method for elbow flowmeter which based on the analysis of elbow flowmeter’s theory, construction, working condition, and fault characteristics. In the method, we applied the concept of static quality, dynamic quality and used quality index to show the quality condition of flowmeter precisely. The fuzzy math theory, finite element analysis technology and online detection technology were used in our method. The digital quality evaluation system can get more accurate testing values, more stable dynamic performance and faster fault diagnosing for flowmeter .
Planar Hall Effect Ring Sensors for High Field-Sensitivity
Authors: Sinha Brajalal , Oh Sunjong , Sri Ramulu Torati , Lim Jaein , Kim Dong Young , Kim Cheol Gi
Published: August 2011

Planar Hall effect sensor has been explored using multi-layer cross-shaped and bridge geometry. We present planar Hall effect in a ring-shaped geometry experimentally that shows progress of sensor sensitivity as well as output signals. Sensitivity improves about 170 times compare to cross-shaped geometry and about 1.4 times to bridge geometry in conventional measurement system. These values become 2.5 times larger at 20o measurement system. The presented ring geometry may take great potential in Planar Hall effect sensor applications.
An Algorithm of 3-D ADI-R-FDTD Based on Non-Zero Divergence Relationship
Authors: Jin Xiu Hai , Chen Yi Wang , Zhang Pin
Published: August 2011

In this letter, an alternating-direction reduced finite-difference time-domain (ADI-R-FDTD) method is presents. It is proven that the divergence relationship of electric-field and magnetic-field is non-zero even in charge-free regions, when the electric-field and magnetic-field are calculated with alternating-direction finite-difference time-domain (ADI-FDTD) method in 3 dimensions case, and the expression of the divergence relationship is derived. Based on the non-zero divergence relationship, the ADI-FDTD method is combined with the reduced finite-difference time-domain (R-FDTD) method. In the proposed method, the memory requirement of ADI-R-FDTD is reduced by1/12 of the memory requirement of ADI-FDTD averagely in 3D case. The formulation is presented and the accuracy and efficiency of the proposed method is verified by comparing the results with the conventional results.
Study on Acceleration Control Algorithm of Blood Pump Driven by Large Gap Magnetic Force
Authors: Tan Jian Ping , Liu Yun Long , Liu Heng Tuo , Tan Wei , Tan Zhuo
Published: August 2011

Based on the startup dynamics model axial flow blood pump system driven by large gap magnetic force, a method that realized optimal control in the blood pump acceleration by using VB programming was brought forward. In this method, Runge-Kutta algorithm was used to solve and analysis the model and the result that speed, flow and net head etc. time-domain curves were obtained; further more, suitable stable points in the speed curve could be found by setting threshold, and finally Hermite interpolation was used to discrete speed curve in conditions to get time constant and steps etc. speed control parameter. Relative to the old method for the speed control of blood pump, it is more accurate and controllability condition.
The Realization of the Information Acquisition System for Fiber-Capacitive Drop Analyzer
Authors: Song Qing , Chen Zi Lan , Luo Yuan , Li Jie , Zou Cun Wei , Guo Ling Yun
Published: August 2011

This article combines the virtual instrumentation with the droplet analysis technique. According to the characters of the signal collected by the fiber capacity drop analyzer, the system employs dual channel acquisition. The design of the interface program is completed by invoking the Dynamic Library files of the data acquisition card, taking the advantages of the dynamic linking technology of LABVIEW. Friendly interface is designed. And the functions, such as data acquisition, display and save, are realized. The information acquisition system for the fiber capacitive drop analyzer is finally achieved by LABVIEW.
Control System and Signal Acquisition of Intelligent Bending for Wide Quadrangle Plate
Authors: Su Chun Jian , Miao Shuang Shuang , Guo Su Min , Chu Zhen Yun , Ma Rui
Published: August 2011

Springback is the prominent problem in bending forming of sheet metal, which is difficult to control accurately, especially for the bending plate with complicated shapes. In this paper, the scheme of intelligent bending control system of wide quadrangle plate was proposed by using the neural network technology, and the experimental system of sheet bending intelligent control was also established. The key contents of the experimental system are real-time acquisition and control to signal, which is the technical support for achieving intelligent control of sheet bending successfully, including monitoring, collection, processing and control to signal. Control system and signal acquisition of intelligent bending for wide quadrangle plate was developed in this paper by using the virtual instrument technology and LabVIEW (Laboratory Virtual Instrument Engineering Workbench) as system control software. The experimental results show that the error of side-wall angle and flange angle of plate after springback is small, which indicates that the control system of intelligent bending with the signal acquisition and control system as the core is feasible.
A Time-Delay Prediction Control Method Based on Immune Optimization
Authors: Xu Xue Song , Liu Xing Bao
Published: August 2011

A time-delay predictive control algorithm based on immune computational intelligences is proposed in this paper. The predictive control parameter was optimized through immune clonal selection. Which avoids calculate Diophantine equation and inverse matrix, reduces the input dimensions of the nonlinear map. Simulations were conducted on the time-delay system, non-minimum phase of the process system, divergent system illustrate that this approach is a feasibility and effectiveness way and demonstrate its rapid responds, small overshoot and high adaptability for time delay system.
Study on Temperature Field Characteristic and Temperature Detection of Shuttle-Type High-Temperature, High-Pressure, Anti-Erosion Special Valve
Authors: Long Xiu Jun , Jiang Gang , Zeng Xiang Wei , Xiang Ke Feng
Published: August 2011

Check valve is an important fluid control component of pressure pipeline system, shuttle-type high-temperature, high-pressure, anti-erosion special valve is a new type of check valve. The simulation with CFD software Fluent and analysis for its internal temperature field was done, and then make a comparison between Shuttle-type high-temperature, high-pressure, anti-erosion special valve and swing check valve, and it can be concluded that the former doesn't exist local thermal stress concentration. Ultrasonic speed in high-pressure water and steam rely on its temperature, according to this relation, it can be calculate the temperature of fluid in the valve by measuring the transit time of ultrasonic.
Experimental Investigations and Analysis of Springback Based on Multi-Angle Panel Draw-Bending
Authors: Chen Jin Xin , Zhang Xia , Wang Chang Tao , Gao Jian He
Published: August 2011

A real time strain measuring device has been designed in allusion to multi-angle influence on springback in shaped parts. The strain has been studied at the shaping of part with different bend angles’ numbers. The multi-angle draw-bending forming and springback mechanism have been observed by metallurgical structure searching.
Development and Application of Non-Circular Gear Emulsion Motor
Authors: Xu Qin , Huang Yuan Yue
Published: August 2011

Emulsion is a semi-synthetic metalworking fluid product containing mineral oil, with cooling, lubricating, rust and other major functions and the most advanced formulation technologies. This paper reports the working principle, the main performance parameters and application of emulsion as the working medium to a new type of non-circular gear motor emulsion structure in the mine machinery, and analysis the seal material selection of non-circular gear emulsion motor and the surface treatment of over-current end.
Research on Control Characteristics of Cartridge Valve Controlled by High-Speed On/Off Valve
Authors: Wen Cheng Zhuo , Wu Zhang Yong , Duan Zhen Hua , Cen Shun Feng , Wang Qing Hui , Wu Xi
Published: August 2011

The operating principle of cartridge valve controlled by high-speed on/off valve is expounded, the mathematical models are established on the basis of the principle. The simulation model of system is created in AMEsim. By analyzing the curve charts of spool’s displacement and outlet flow rate of cartridge valve, the PWM signal frequency and duty cycle have influences on the control performance of cartridge valve controlled by high-speed on/off valve are concluded. The results show that the cartridge valve can be got good linear control when the input signal is low- frequency and moderate duty cycle.
Reconfigurable Design and Implementation of Gravure Engraving Motion Controller Based on FPGA
Authors: Liu Liang , Zhou Zhao Yao , He Ke Jing , Cao Wen Jiong , Qin Xue Feng
Published: August 2011

Reconfigurable logic has gained relevance in high-speed computer numerical control (CNC) digital controller. In this paper, a design of three-axis high speed gravure engraving machine motion controller based on programmable logical device is proposed. In the design of the hardware, the prevalent technology of Filed Programmable Gate Array is applied, which enhances the flexibility of the hardware. All the circuits and algorithms are developed using hardware description language. A novel solution for acceleration and deceleration control of servo motors is implemented in FPGA. This system is already applied in a high speed (8K) gravure engraving machine, and the results prove that this controller based on a low-cost FPGA platform is highly precise and of great universality.
Effects of High Yield Ratio on Material Properties of Pipeline Steel
Authors: Yao Ting Zhen
Published: August 2011

The nominal yield ratio, true yield ratio and static toughness of five materials X80, X65, X60, X46 and Q235 have been tested in this paper. The yield ratio of pipeline steel is rising with the increase of strength level, which is inevitable for the high strength pipeline steel. Based on the analysis of static toughness calculated by the true stress-strain curve, it is indicated that the deformation energy of X80 pipeline steel after the necking process in the course of static tension is high comparatively, and the deformation energy of X80 pipeline steel before the necking process is closed to that of the pipeline steel X46 and X60 with low yield ratio. It is showed that the increase of yield ratio did not lead to the decline of the static toughness.
Direct Slicing of CAD Model and Volumetric Error Compensation in Rapid Prototyping
Authors: Wang Wei Chen , Gu Hai Xia
Published: August 2011

Aiming at the disadvantage of slicing STL model in rapid prototyping, a method of slicing CAD model directly is proposed to advoid the precision damage during converting CAD model to STL file. The effect of the staircase error to the part surface is analyzed, and an algorithm of compensating the section contour is proposed to eliminate the layers’ volumetric difference and improve the part surface precision. The test shows that the methods can obtain the accurate sections of CAD model and improve the part’s shape and size precision.
Fabrication of Removable Partial Denture Framework by Selective Laser Melting
Authors: Chen Guang Xia , Zeng Xiao Yan , Wang Ze Min , Guan Kai , Peng Chang Wen
Published: August 2011

The removable partial denture framework is very complex in shape with many curved surfaces, which is a very important assistant tool in prosthodontics. Generally, frameworks are fabricated by single piece basing on mould by traditional cast technology, which has many shortages of multiple steps, time cost and defects such as sand adheres, inner holes, cracks and segregation etc. As a novel method, selective laser melting (SLM) rapid prototyping technology has the advantages of short manufacturing cycle, high precision and flexibility, simple fabrication arts, which can be used to replace the conventional cast technology in the areas of prosthodontics. A SLM system was designed and developed by ourselves, which is consisted of an Yb-fiber laser, an optical scanner, a powder coating device, a gas purification system and a control system, the process parameters were investigated systematically and optimized, finally fabricated removable partial denture frameworks with stainless steel and titanium materials successfully by using the SLM system under optimized parameters. The tests showed that the frameworks have an average dimension precision of ±0.172mm. The wearing experiments on the plaster mouth molds demonstrated the removable partial denture frameworks fabricated by SLM can be fully applied to clinic after some post- processing procedures.
Analytical Approximations to Buckling Deformation of the Sandwich Beams Including Transverse Shear
Authors: Yu Yong Ping , Zang Lin , Sun You Hong
Published: August 2011

This paper presents analytical approximate solutions for the initial post-buckling deformation of the sandwich beams including transverse shear. The approximate procedure is based on the nonlinear beam equation (with transverse shear included), by combining the Newton’s method with the method of harmonic balance, we establish analytical approximations to deformation of the sandwich beams. Illustrative examples are presented for a few typical sandwich construction configurations, and it is shown that these approximate solutions are excellent agreement with the “reference” solutions.
Paired Characterization and Preliminary Correction of Low-Cost Soil Moisture Sensors for Wireless Sensor Network Application
Authors: Ye Zhi Jie , Hong Tian Sheng , Wen Tao , Li Zhen
Published: August 2011

In order to fulfill the need of minimizing sensor cost and characterizing sensor agricultural application for the promising wireless sensor network technology, this paper evaluates a pair of SMC sensors (EC-5 and 5TE) under some laboratory experiments which is based on a standardized sensor characterization methodology using liquid medium with a known standard water content. The results showed that the electronics of the EC-5 and the 5TE are sensitive to temperature, electric conductivity and pH variations and it is concluded that both the 5TE sensor and the EC-5 sensor are suitable for wireless network applications. Moreover, the results of this paper also suggested that the effects of temperature, electric conductivity and pH on the sensor measurement ability have to be compensated using the appropriate correction functions. Future work will focus on the field application of these sensors and their correction effects in more detail to derive more general correction functions.
Study on Treatment Technology of Waste Water with Copper in Complex System
Authors: Chen Wen Song , Lin Hua Shi , Lin Jian Feng
Published: August 2011

The study compared three processes of characteristics of Na2S precipitation, Fenton oxidation and coagulation. The results show that Na2S precipitation has the best treatment effect and convenient operation, but the processing cost is slightly higher. Fenton oxidation treatment effect is good, whereas the cost is high and more complicated process. Coagulation treatment is the lowest-cost and easy to operate, however the treatment effect is the worst. The research results have realistic instruct significance for the formulate process scheme of copper-complexes wastewater treatment.
Corrosion Behavior of Cobalt-Based Stellite 6 Alloy by Combustion Synthesis and Vacuum Induction Melting
Authors: Xu Yang Tao , Xia Tian Dong , Zhao Wen Jun , Wang Xi Jing
Published: August 2011

Cobalt-based Stellite 6 alloy rely primarily on carbides, forming in the Co matrix and grain boundaries, for their strength and the distribution, size and shape of carbides depend on processing conditions. We have employed microstructure and corrosion behavior of Stellite 6 by combustion synthesis and vacuum induction melting with scanning electron microscopy, electron probe microscopy analysis. The results show that there are significant uniformity on microstructure and corrosion behavior of Stellite 6 by different techniques. The combustion synthesis has more advantages over conventional manufacturing process for Stellite 6.
Research on Non-Meshing Force Gear Pump
Authors: Luan Zhen Hui , Ding Ming
Published: August 2011

On the basis of research on gear transmission theory and the working principle of a gear pump, this paper puts forward the construction principle of a non-meshing force gear pump. The discussions focus on the working principle, construction features, design and finite element analysis of the driving shaft. The research indicates that the new pump has such advantages as lower noise, better distributed flow and a high work pressure. It can be widely used in hydraulic system.
Study of the Effect of Liquid on Mixing Process for Size-Type Binary Particulate Systems by DEM Simulation
Authors: Gao Hong Li , Chen You Chuan
Published: August 2011

The discrete-element method(DEM) was employed to simulate the mixing and segregation process for size-type binary particulate systems in a rotating horizontal drum for dry particulate systems and wet particulate systems. The effect of interstitial liquid on the mixing and segregation process were studied. The simulation results showed that the liquid bridge between particles play an important role in mixing and segregation process, as a result, segregation may be mitigated and mixing may be enhanced. To assess the accuracy of the simulation result, some comparisons were made with the experimental results in the literature.
The Vibration Fault Diagnosis of High-Speed Rotating Machinery Based on the Simulation
Authors: Tian Ya Bin , Qi Xu Yi , Liang Guo Bin
Published: August 2011

Many researchers explore the issue about how to predict equipment failures and how to analyze the cause of the failures and to solve them. The mass imbalance is the most common cause of the malfunction of the rotating machinery. Based on the theory of rotor dynamics, we can diagnose the failure and its causes more accurately by applying the software to doing simulation analysis of characteristics of rotor dynamic. And, it provides the reliable basis for the further solutions of the failures. In this paper, we analyze a corporation's compressor with abnormal vibration in operation, and finding out the reasons for its vibration. According to the calculated results, we transformed the local structures of its rotor. After transformation, the compressor runs smoothly.
Study on the Stress-Strain Distribution Rule of the Cylindrical Part Deep Drawing with Prefabricate-Holes
Authors: Tan Li Guang , Xiao Xiao Ting , Wen Hua Dian , Chen Qiao Yu
Published: August 2011

With the flange deformation in the deep drawing process of prefabricate-holes part, makes the area around the prefabricate-hole as the research object, the mechanical model was established, using analysis software of Dynaform to simulate and analyze, explore the stress-strain distribution rule of the deep drawing process.
Preparation and Characterization of H-PAN Grafted PEG Phase Change Fibers
Authors: Guo Jing , Xu Lei , Li Dan , Liu Xin
Published: August 2011

Using waste polyacrylonitrile fibers as raw materials. After the polyacrylonitrile fibers was hydrolyzed by NaOH and was grafted by PEG, H-PAN grafted PEG phase change fibers were prepared by wet spinning . The spinning process of the phase change fibers was observed, and the best spinning process was determined. Discussed the mechanical properties of the phase change fibers on the spinning solution concentration, crosslinker concentration, coagulation bath concentration and coagulation bath temperature. Temperature adaptable and durability properties of phase change fibers were characterizated by step cooling curves. The results showed that the best spinning process of the phase change fibers was the spinning solution concentration 20%, crosslinking agent concentration 4%, the concentration of coagulation bath 90%, the solidification temperature 30°C. The phase change fibers had good temperature adaptable property and temperature adaptable durability.
Procurement Mode Research on Open Solicitation of Qualified Suppliers for the Construction of Guangzhou Asian Games Stadiums
Authors: Zhang Gong Liang , Li Jian
Published: August 2011

Open solicitation for qualified suppliers, expert assessment, establishment of qualified suppliers database, reassessment and other procurement modes are applied in bids of large-scaled public construction engineering so that contractors could select the materials according to the qualified suppliers database and an effective way could be ensured to the procurement of large public construction engineering with high technical contents, high construction costs and key roles in the operation of the system. Such modes have been applied in the renovation of Guangzhou Asian Games Stadiums during which the whole process control measures have been taken from the qualification verification, sample test, orders, manufacturing to on-site quality inspection, installation, commissioning, etc. so as to ensure the conformity of materials and electromechanical equipment to the design requirements and guarantee the construction quality.
Coiling Parameters Calculation of Inner Stator Iron Core Using FEM
Authors: Chen Xue Yong , Chen Shi Guo , Ruan Jian Zhong
Published: August 2011

In the paper the coiling process of Electrical motor stator iron core and its present condition are introduced. The coiling mechanism of inner stator iron core is analyzed. How to get the coiling parameters: pitch of tooth tape and recover value of coiling by FEM is discussed in details. It is verified by the results obtained from FEM, which shows an accurate agreement. The inefficient and high-cost problem experimental approach to find the operation parameters is avoided.
Continuous Casting Process Parameters on Central Defect of SWRH82B Billet
Authors: Li Chang Rong , Yao Zhen , Liang Zhao Hua
Published: August 2011

Continuous casting process parameters such as casting speed, superheat, secondary cooling water flow rate have greatly affections to central defects in SWRH82B billet. These parameters were investigated by the methods of chemical content analysis and etch test for macrostructure in some steel plant of china. The results shows that the central defect of SWRH82B billet can be improved when the superheat is controlled at the range of 15~25°C, casting speed is 1.80m•min-1 and secondary cooling water flow rate is 0.72 L•kg-1.
Transient Dynamic Analysis of Maglev Linear Feed Unit
Authors: Jiang An Dong , Jin Jiang , Ma Su Yang , Xia Zheng Peng , Liao Ping
Published: August 2011

Abstract. The magnetic levitation linear feed unit is a new type of machine features. In machining, the tool and workpiece interaction force will be delivered to the table and make the deformation, resulting in processing errors of machine tools, machining of precision and surface quality. In this paper we established three-dimensional finite element model of the table of feed unit, use the finite element analysis software ANSYS to analysis of the transient dynamic analysis of the pre-designed table and improve the structure of the table at the design stage and forecast performance of the table and provide a theoretical basis for structure optimization.
Coating of MgO and Bio-Medicine on Surface of Magnetic Nanoparticles
Authors: An G , Ju D. Y , Kumazawa T , Okasabe M
Published: August 2011

This paper is mainly to describe coating method of MgO nano film with about 2nm and Bio-medicine materials on surface the magnetic nanoparticle. The coated composite magnetic nanoparticles of coated were dispersed into ion exchange water, widely known as magnetic fluids for applying to Drug Delivery System(DDS). Through observation of micro-structure of MgO film and the bio-nanopaticles on coating surface, and evaluation of magnetic property, we known that the effectiveness of this coating method of MgO and the bio-medicine coated on surface of magnetic nanoparticles was confirmed.
The Functional Design and Non-Functional Design of Post-Industrial Era
Authors: Fu Yan Li , Hu Wei Ping
Published: August 2011

The future development trend of industrial design is prospected, and the indispensable status of the function and modeling of the post-industrial era in the industrial design is analyzed. Based on the analysis, some indispensable suggestions on industrial design under the post-industrial era are proposed in this paper. The essence of industrial design is to explore the basic human needs and the omni-directional functionality of the designed products, and to design more innovative creative and interesting products under the premise of meeting these use function.
Design on Plug Seedling Automatic Transplanter in Greenhouse
Authors: Tian Su Bo , Qiu Li Chun
Published: August 2011

Transplanting of plug seedling is one of the most important operations during vegetable and flower production. Due to the higher labor intensity and lower efficiency for the operation, it is difficult to enlarge production scale for vegetables and flowers. Although transplanting of plug seedling is now common method, all operations are still manually conducted in China. To enlarge productivity for increasing food supply, it has become an urgent task to achieve automation of plug seedling transplanting for Chinese horticulture industry. This paper deals with the automatic transplanter for plug seedling, which is significant to promote development of production automation of seedling nursing and transplanting in China. Then, the simple, practical automatic transplanter for plug seedling, including manipulator, conveyor system for plug tray and flowerpots, overall structure and PLC control system was designed. Finally, Prototype was manufactured and performance tests were conducted. Results showed that the automatic transplanter had reliable transplanting performance.
Study on Profibus-Based Control System of the Experimental Device for Cutter Head in Shield Tunneling Machine
Authors: Huang Xiu Xiang , Tan Qing , Xia Yi Min , Liu Wen Hua
Published: August 2011

The structure and characteristics of test signals of the experimental device for cutter head in shield machine are analyzed. Based upon this analysis, Profibus-based control system is designed. With the use of a distributed I / O station on-site analog signal, the problems of anti-interference for long-distance transmission of signals are resolved, and high-speed transmission for sensor signals and control signals are realized.
An Auto—Design System of Gleason Spiral Bevel Gear
Authors: Feng Li Yan , Tian Ming Yu , Liu Chun Hua , Liu Teng , Ma Zhi Hao
Published: August 2011

Owing to the spiral bevel gear has a complex geometrical shape, a great number of parameters and a complicated calculation process, a computer-aided design system of the Gleason spiral bevel gear has been developed based on VBA, so as to rapidly make geometry calculation, strength calculation, 2D and 3D parameterization drawing, machining parameters calculation, and so on. Thus it can greatly improve the speed and accuracy of design. In this paper, the overall structure and main functions of the system have been discussed. By taking two meshing gears used on MU trains as a design example, some computing process and results are given out.
3D Nonlinear Guidance Law for Bank-to-Turn Missile
Authors: Peng Shuang Chun , Pan Liang , Hu Tian Jiang , Shen Lin Cheng
Published: August 2011

A new three-dimensional (3D) nonlinear guidance law is proposed and developed for bank-to-turn (BTT) with motion coupling. First of all, the 3D guidance model is established. In detail, the line-of-sight (LOS) rate model is established with the vector description method, and the kinematics model is divided into three terms of pitching, swerving and coupling, then by using the twist-based method, the LOS direction changing model is built for designing the guidance law with terminal angular constraints. Secondly, the 3D guidance laws are designed with Lyapunov theory, corresponding to no terminal constraints and terminal constraints, respectively. And finally, the simulation results show that the proposed guidance law can effectively satisfy the guidance precision requirements of BTT missile.
Study of Smooth and Accurate Position Controls of Pneumatic Artificial Muscle Actuators for Robotic Arms
Authors: Wang Yu , Shi Zhong Xiu , Wang Ji Rong , Han Ray P.S.
Published: August 2011

This paper utilizes position errors, position error rates and payload variations as inner feedback loops for controlling the actuators of joint rotations in a pneumatic artificial muscle (PAM) driven robot. The result is an algorithm that is able to adaptively regulate input signals for the proportional pressure valve that controls the air flow to the PAM, in an attempt to better mimic the point-to-point movement of human arm. Further, the algorithm is able to utilize the angular position information from an outer feedback loop to activate/deactivate a solenoid valve for a rapid damping of the non-oscillatory motion and thereby, able to quickly and accurately bring the joints to a rest at a desired position. The proposed method appears to be effective in overcoming some of the inherent drawbacks that arise from the viscoelastic shell and air compressibility of the PAM element.
Coding Method of Visual Perception Reconstruction Based on Curve Fitting and Energy Function
Authors: Ke Hong Chang , Wang Hui , Kong De Gang
Published: August 2011

Efficient encoding of visual perception has a profound influence on machine vision and research and development of human-like intelligent systems. A coding method of visual perceptual reconstruction which was according to Gestalt perceptual organization principle was proposed. Visual perception connected discontinuous curves which can connect with reasonable smoothing method through curve fitting first before shape recognition and shape coding. Coding method filled in points of discontinuous place to get whole contour. Energy function was designed. Coding method can give the most reasonable solution when there are many methods of perception reconstruction. This paper described the implement method of coding method, and based on psychology used typical graphics which is used to explain the adjacent ratio to make experiment. The experiment results demonstrated that the coding method of visual contour reconstruction proposed accorded with Gestalt perception organization principle.
The Study of an Improved Fuzzy Edge Detection Algorithm in the Radial Tire Quality Detection
Authors: Li Fang Yuan
Published: August 2011

The internal radial tire defects will affect the performance and the service life of the automobile. But the traditional detection method is to observe and detect in eyes using X-ray map which result that a lot of quality problems can not properly been judged out. This paper describes the X-ray image recognition using a fuzzy algorithm. The improved algorithm simplifies the traditional fuzzy algorithm complexity without the transform and inverse transform. The experimental results show that the improved algorithm makes the computational efficiency and extract more refined and clear edge for the radial tire which can correctly identify the failure and provide the necessary data processing.
Application and Evaluation of Halbach-Like Magnet Arrays to Magnetic Drug Targeting
Authors: He Wei , Ji Yong Liang , Xu Zheng , Li Ming , Luo Cong
Published: August 2011

Among the proposed techniques for delivering drugs to specific locations within the human body, magnetic drug targeting (MDT) surpasses because of its noninvasive character and its high targeting efficiency. In this study, two novel arrangements of permanent magnets, Halbach array and spin-Halbach, were introduced to improve the magnetic force acting on a magnetic micro/nanoparticle. Then an approach of design and evaluate the MDT magnets was developed, which was based on three performances proposed in the paper, force parameter, evaluation variable, and transverse inhomogeneity. Corresponding parameters for Halbach-Like arrays at distance of 3 cm of application from magnetic field source were calculated and compared with the other two simple magnet arrays. According to the results, the values of performances for the Halbach-Like magnet arrays were improved obviously.
Preparation and Properties of MgXZn1-XO:Al Ceramics
Authors: Yan Hong , Wang Hua
Published: August 2011

MgxZn1-xO:Al ceramics with high density and low resistivity were prepared by solid-state sintering process. The influence of Mg content on structure and properties of MgxZn1-xO:Al ceramics were studied. The Mg content influence mainly the phase structure and grain growth, as a result influence the relative density and resistivity of MgxZn1-xO:Al ceramics. The MgxZn1-xO:Al ceramics with high density and homogeneous structure can be made when the Mg content is over 0.3. Mg content effect obviously the condctivities of MgxZn1-xO:Al ceramics due to the variation of the carrier concentration and the mobility deriving from the change of micro structure and Al-doping efficiency when the Mg content is under 0.2.
Molecular Dynamics Simulation of Ni/Cu Epitaxial Thin Film Growth
Authors: Liu Zhi Qiang , Li Jie , Zhou Nai Gen , Wei Jian Ning
Published: August 2011

In this paper, the growth process of Ni deposited on the Cu() surface at 300K and 700K was simulated by molecular dynamics. The impact of the substrate temperature on the growth pattern and structure of thin film was investigated. The simulation results show that, at the higher substrate temperature, the surface of thin film is smoother and the growth pattern of thin film is two-dimensional layer, however, at the lower temperature, the growth mode of thin film is three-dimensional island.
The Experiment of Ultimate Capacity for the Reinforced Concrete Beam Strengthened with CFRP
Authors: He Jian , Wang Tong , Wang Huan
Published: August 2011

As to reinforced concrete structure, the method to deal with the shortage of bearing capacity is one of the puzzles of structure engineering, so its reinforcement technology is a research hotspot. At present, although there are many reinforcing methods of existing structures, FRP is the more widely used in engineering because of its efficiency, low cost, and beauty. The paper takes the strengthened reinforced concrete structure beam with FRP for example, bearing capacity of normal section, the shear bearing capacity and cohesiveness is tested, and bearing performance for strengthening the strengthened reinforced concrete beam with FRP is analyzed.
Research on Intelligent Cane-End Cutting Based on Image Processing for Sugarcane
Authors: He De Qiang , Liu Qi Yang , Li Liang Xin , Miao Jian
Published: August 2011

An automatic identification method for the cane-end of sugarcane based on digital image processing is given considering the characteristic of the cane-end of sugarcane. An image processing method with Visual C++ is used in the dynamic acquisition and jitter procedure, and identifying the cane-end automatically. The identification system of the cane-end of sugarcane consists of the image acquisition unit, the image processing unit, the identification and control unit. After the digital image of a cane-end is collected, the identification system locates the edge between the cane-end and the body of the sugarcane immediately and automatically via image processing and identification, providing the location information of the cane-end for the following mechanical cane-end cutting method. This system can massively improve the productivity of the cane-end cutting mechanism in a sugarcane harvester.
The Tensile Property of the SPF/Cotton Blended Yarn
Authors: Yang Qing Bin , Yang Xiao
Published: August 2011

In order to analysis the relationship between the strength and elongation and the blended ratio of SPF/Cotton blended yarn, the strength and elongation of SPF /cotton blended yarn with different blended ratio were measured and compared with the simple model. The results indicated that For the SPF/cotton blended yarn, the difference between the experimental data and the model value is remarkable because of the high cohesion of the cotton fibers.
Composite Material Pressure Vessel Design Research
Authors: Cheng Huan Xin
Published: August 2011

Some composite material characteristics are summarized and main advantages of composite material are analyzed in the paper. In addition, stress analysis methods, failure rules and design techniques of a pressure vessel are also recommended. Finally, the importance of composite material has been summed up . The paper has some reference values to investigation of a composite material pressure vessel.