bluuebunny/crossref_metadata_2025 huggingface dataset:
An Intelligent Integrated Method for Quality Prediction in Lead-Zinc Sintering Process
Authors: Wang Chun Sheng , Wu Min , Lei Qi
Published: March 2011

Based on some features in lead-zinc sintering process (LZSP), such as large time delay and strong non-linearity, an intelligent integrated method for quality prediction based on back-propagation neural network (BPNN) and improved grey system (IGS) is presented. First, the compositions of agglomerate are predicted by BPNN and IGS models. Then, a recursive entropy algorithm for the weighting coefficients is devised from the viewpoint of the information theory and an intelligent integrated prediction model (IIPM) is established. The compositions of sinter agglomerate are predicted by integrating the two prediction models. Application results show that the IIPM has higher prediction precision than that of single model and the proposed intelligent integrated method settles the modeling problem of the quality in the LZSP.
A Mathematical Framework for Cellular Repair Mechanisms under Genomic Stress Based on Kinetic Theory Approach
Authors: Qi Jin Peng , Zhu Ying , Ding Yong Sheng
Published: March 2011

Generally, a cell can trigger its self-defense mechanism in response to genomic stress under acute perturbations from outer environment. To investigate the dynamic kinetics of cellular repair mechanisms in fighting against genomic stress, a mathematical model of representing and analyzing DNA damage generation and repair process is proposed under acute Ion Radiation (IR) by using the Kinetic Theory of Active Particles (KTAP). In this paper, we focus on describing a mathematical framework of Cellular Repair System (CRS). We also present the dynamic processes of Double Strand Breaks (DSBs) and Repair Protein (RP) generating, DSB-protein complexes (DSBCs) synthesizing, and toxins accumulating under continuous radiation time.
Modal Analysis and Optimal Design of High-Speed Turning Center’s Spindle Box
Authors: Zhang Zhi Wei , Zhang Wei , Song Jin Chun , Li Song
Published: March 2011

This article is to provide a method to make the structure of machine tools lightened and improve its anti-vibration capacity. Modal analysis with pre-stress of High-speed Turning Center’s spindle box was performed using ANSYS Workbench; based on the above results, we optimized the spindle box using topological optimization and dimensional optimization methods. Finally, we make the spindle box’s weight reduce by 4.44%, its first order frequency increase by 15.82%, its first mode maximum amplitude decrease by 9.18%.
A New Approach to Conceptual Design Based on Path Decomposition of Digraph
Authors: Zhang De Zhen , Zhang Wei Shi , Zhang Jian Ming
Published: March 2011

A new approach to conceptual design based on path decomposition of digraph is presented in the paper. The set of basic mechanisms is firstly defined and every single mechanism is taken as a basic element in the set. The relationships among basic elements are described with paths or loops in the graph theory. Therefore, the conceptual design can be visualized as searching a suitable loop in the set of basic mechanisms. The digraph and the path decomposition in the graph theory are applied to represent solutions of conceptual design, such as the sequence, existence and the concatenation formation and repetition. And then, an illation formula is derived and a construction tree of conceptual design process is provided. The generated schemes are further filtered using character restriction operation which followed corresponding rules, so as to identify feasible solutions. Finally, a design example is given to demonstrate the effectiveness of the proposed approach.
Cumulative Seismic Damage of Reinforced Concrete Columns: Variable Amplitude Tests
Authors: Xing Guo Hua , Pan Yuan , Fu Guo , Hou Jian Ling
Published: March 2011

The findings from an experimental study to investigate cumulative seismic damage in reinforced concrete columns are presented. Fourteen identical half-scale concrete columns were fabricated and tested to failure. Results from Phase I testing, which included constant amplitude tests to determine the low-cycle fatigue characteristics of the rectangular concrete column, were presented in a companion paper. This paper summarizes results of variable amplitude tests. The imposed displacement histories were obtained from analytical simulations of the model column subjected to a series of earthquakes. Test observations indicate that failure is generally initiated by confinement inadequacy and the rupture of the transverse hoop reinforcement. The tests also demonstrated the potential for low-cycle fatigue fracture of the main longitudinal steel when the specimen was subjected to relatively larger displacement amplitudes. A fatigue-based damage model, derived from the constant-amplitude tests completed in Phase I testing, was applied to the observed response of the three specimens tested in this phase. Findings from the study indicate that the energy capacity of members is ductility-dependent and that fatigue-based damage models offer a reliable means of assessing seismic structural performance.
Study of Nonlinear Dynamic Characteristics of Joint Configuration
Authors: Li Lei , Zhang Jian Run
Published: March 2011

Joint configuration reveals some nonlinearity under different conditions. In this paper, a bolted joint structure subjected to different preload and external excitation is designed to study the nonlinearity dynamic characteristics of assembled structure. At the same time, nature frequent and damping nonlinear characteristics of the bolted connection are analyzed based on energy dissipation theory. The urgency of discussing the nonlinear characteristics of the joint configuration is discussed, and the theoretical and experimental foundation was established.
Fabrication of TiAl/Ti2AlC Composite by Reaction Hot Pressing
Authors: Zhu Jian Feng , Yang Wen Wen , Gong Yi Ping
Published: March 2011

TiAl/Ti2AlC in situ composite was successfully fabricated by hot-press-assisted reaction process from the mixture of Ti, Al and carbon black. The phase formation and transformation were investigated in detail by X-ray diffraction (XRD) and the morphology characteristics were also studied by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The results show that when the mixed powders were hot pressed at 1300 °C for 1 h, full dense and highly pure TiAl/Ti2AlC composite was synthesized. The TiAl was the matrix phase and the in situ synthesized Ti2AlC was reinforcing phase. The reaction process was also discussed.
Parameter Identification with FEM on Absorbing Boundary Condition and Genetic Algorithm (GA)
Authors: Chang Jian Mei , Feng Huai Ping
Published: March 2011

Researches of wave motion are important on theory and application. The forward problem and the backward problem are the two aspects that relate with each other. In this paper, with the combination of FEM considering BGT absorbing boundary condition for forward problem and GA method, the inversion of target’s characters in infinite area is discussed. The absorbing boundary condition is obtained through approximating the Sommerfeld radiation condition. Although the absorbing boundary condition can’t simulate the effect exactly, it can reach the limitation in the practice and has the character of solving the coupling that simplifies the calculations. Because of the use of finite element model method, the forward problems that involve special geometrical shaped scatter and multi scatters can be solved. The finite element model is used iteratively to compute the scattered field. In the inversion process, the GA method is adopted because of its advantage of global optimum search and parallel calculation. The numerical simulation examples of single and multiple show the validity of this method.
The Modeling and Simulation of the Precision CNC Lathe Knife Tower Servo System Based on Matlab/Simulink
Authors: Song Jin Chun , Ye Hai , Li Song
Published: March 2011

Based on the analysis of the PMSM’s mathematic model, we’ll use the Matlab/Simulink to construct the simulation model of the precision CNC lathe knife tower servo system. The control system uses the classical three closed structure. According to the servo system's performance requirements, we'll do the parameter selection and simulation. The simulation result proves the validity of the model and provides the theory basis for the system's design and debug.
Engraving and Milling Machine Design Based on Open CNC System
Authors: Cao Shu Kun , Sui Zhi Ming , Liu Lu Ning , Wang Gui Cong , Song Wei Wei
Published: March 2011

In view of application requirements, control axes, the development cycle and other factors of open CNC machine tools, we consider the modular as the guiding ideology and propose a design method of three-dimensional engraving and milling machine based on open CNC system. In this paper we make a detailed design for mechanism structure and control system. Experiments show that this machine has milling and engraving capabilities, can process metal and non-metallic parts, which is a high efficiency, multi-function numerical control equipment.
Research on the Industrialization of the Bimetal Sylinder Liners for Mud Pump
Authors: Jiang Jian Sheng , Lin Li
Published: March 2011

A kernel technology of the bimetal cylinder liner of mud pump concerning industrialization is introduced, based on which the optimal design of chemical composition and material structure of the inner cylinder liner, investigation of the interleaving centrifugal foundry process of dual liquid and the development of the centrifugal foundry equipment for the dual liquid are made. Compared with the present heating assembling process used in production, the new technology has demonstrated some advantage for longer service life, lower cost of production, and so on, consequently leading to the industrialization of the mud pump liner made from integrative composite material.
Excavation of High-Stressed Hard Rock with Roadheader
Authors: Zhou Zi Long , Li Xi Bing , Zhao Guo Yan , Liu Zhi Xiang , Xu Guang Ju
Published: March 2011

Drill and blast method becomes unfavorable for deep mining of hard rock. Mechanical excavation with roadheader EBZ160TY was trialed at work face with hard rock and high ground stress. Work procedure and performance of the roadheader were recorded and analyzed. The results showed that, roadheader EBZ160TY, with designed excavating strength of 80 MPa, presented amazingly good performance in hard rock with strength of 148 MPa and consumed less cost compared to drill and blast method. High stress was found to play positive role in improving its working ability. Under the gentle disturbance of roadheader excavation, the high ground stress brings the surrounding rock mass to deform into yield and lets the stress/strain energy transform into fracture energy of rock fragmentation. With the push and rotation of roadheader, structural instability of confined high-stressed particle aggregate other than rock failure by mechanical wearing happens. The results show a good application prospect for roadheader in hard rock excavation especially at deep level.
On the Dead-Center Positions of Stephenson Six-Bar Linkage
Authors: Zou Yan Huo , Guo Xiao Ning , Chu Jin Kui
Published: March 2011

A new method for identifying the dead-center positions of the Stephenson six-bar linkage is presented by this article. This method uses the input-output polynomial equation of the linkage and the corresponding Sylvester's resultant to formulate the necessary condition of the dead-center configurations as a polynomial equation in terms of the input parameter; then through a simple analytical method to obtain all the truly dead-center positions among the double roots to the condition equation. An example is given to demonstrate the validity of this method.
Research on Special Number Arithmetic Overflow in Programs
Authors: Chen Jian Jun
Published: March 2011

Special numbers overflow and underflow threaten the software security in programs or software. To find the overflow vulnerabilities features, we design a multi-dimensional structure according to IEEE 754 floating point special numbers formats. Based on special numbers definition in language and arithmetic operation overflow ranges, we analyze the overflow and underflow properties of special numbers arithmetic operation in algebra systems. We test the arithmetic overflow and underflow of floating point special numbers in different CPUs. The experimental results indicate the floating point overflow exists in many kinds of language programs and binary executable software.
Effects of Steel Case on Underwater Shock Wave
Authors: Rong Ji Li , Xiang Da Lin , Li Jian
Published: March 2011

The effects of steel case confinement for the aluminized explosive on underwater explosion(UNDEX) were experimentally and numerically investigated. The experimental results using 1kg cylindrical charge cased 6mm steel shell, show that steel case enhance the peak pressure, impulse, shock wave energy and decay time relative to the bare charge. The effect of different thickness of steel case was analyzed. With the increase of the case thickness, the shock wave were enhanced first and weaken later, and there is a lag-effect for the peak pressure of shock wave. There is an optimal case thickness which could maximum enhance the peak pressure. According to dimensional analysis, it's found that the ratio of case mass and charge mass( ) is a better dimensionless parameter to estimate UNDEX for a cased charge.
The Effect of Laser Processed Nano-SiC-Ni Metal Ceramic on the Surface Properties of the Iron-Based Material
Authors: You Ming Lin
Published: March 2011

In this article, we have carried out the Ni based self fluxing alloy powder and studied the effect on the laser alloying of 45steel layer which contains different weight percentage of nano-SiC powders. Experimental results show that the alloy layer which obtained by the optimized laser alloying process parameters (I = 38A, V = 100 mm / min, Δf=10mm, Ar gas protection) is smoothness, fineness, hardness and have a good metallurgical bonding. The test of tribological wear experiments shows that the wear capability of Ni-based powder made of laser alloyed layer is more excellent than that of the hardened 40Cr steel. And the tribological wear capability of the Ni-based alloy with SiC made of laser alloyed layer has been further improved. In the same process conditions, the addition of 20% nano-SiC is the best.Salt spray test shows that both the Ni and Ni/SiC composite coatings' corrosion is much stronger than that of the 45steel substrate. But with the added amount of nano-SiC increased the resistance of alloying layer corrosion decreased slightly. Finally, this paper use Grey comprehensive evaluation model to value the quality of the alloy layer. The evaluation vector shows that the laser alloyed layer which added 20% SiC has optimal overall performance.
Critical Solid Loading and Rheological Study of WC-10%Co
Authors: Yunn Heng Shye , Muhamad Norhamidi , Sulong Abu Bakar , Fayyaz Abdolali , Li Haw Pei
Published: March 2011

Micro powder injection molding (µPIM) is a preferred technology for the production of micro parts or micro structured parts which derived from the well known thermoplastic injection molding technique. It is suitable for a large-scale production of ceramic and metallic parts without ﬁnal machining. In the hardmetal industry, submicron and ultraﬁne hardmetals are the most demanding and also the fastest growing grades in production and application. Four stages involve in µPIM are mixing, injection, debinding and sintering. The volumetric ratio of solid powder to the total volume of powder and binder, which is usually called powder loading, largely determines the success or failure of subsequent processes. Critical solid loading of the powder can be estimated by torque variation, density, melt flow, density and viscosity versus composition. In this paper, critical solid loading of WC-10%Co is determined using torque variation method and its rheological behavior is studied. During the process, the wet surface of the powder particle WC-10%Co will cohesive together and resulted to the torque. Progressive powder is added-in after torque decrease and critical solid loading is identified when torque becomes unstable. Hence, critical solid loading WC-10%Co with WC (APS < 1 µm) is 46% and 42, 43 and 44 vol% of powder loading are selected to mix with wax-based binder system. The viscosity of feedstock show the pseudoplastic behavior and flow index (n) are 0.444, 0.491 and 0.492 for powder loading 42%, 43% and 44% respectively.
Flow Analysis on Hydrostatic Guideway of Precision CNC Lathe Based on FLUENT
Authors: Li Song , Song Jin Chun , Han Ming Li , Ren Yu Jie
Published: March 2011

In order to improve the machining accuracy of precision CNC lathe, and explore the fluid motion law in the closed hydrostatic guideway, three-dimensional model of hydrostatic oil chamber was established using preprocessor GAMBIT of FLUENT. The Finite Volume Method of Fluent has been used to the simulation of fluid three-dimensional velocity field and pressure field. The fluid velocity vector and pressure distribution graphs are obtained. They reveal the flow field law in the gap fluid. The simulation result of the pressure distribution shows that the flow pressure was not changing in linear gradient all around the gap under moving condition.
Analysis on Dynamic Characteristics of the Linear Rolling Guide Pair and Experiment
Authors: Li Xiao Peng , Nie Wei , Wen Bang Chun
Published: March 2011

Linear rolling guide is one of the most essential parts of the NC modern machine tools, and they play a significant supporting and guiding role in machine tools components. Especially, the joint surface between guides has great influence on machine's dynamic characteristics. According to this, in this work, taken the Japanese THK Corporation's SNS35LR rolling guide as specific study object, the finite element model of guide pair has been established with the joint surface influence considered. And by the method of the theoretical analysis with the experimental confirmation combined; the dynamic characteristics of the linear rolling guide pair's were studied relatively. Thus, the theoretical model and the finite element model established in this paper can be confirmed by the experiment. It has been found that the theoretical models established are consistent with the results of experiment. This study results can provide useful guidance for the dynamic analysis and the structure optimization of CNC machine tools, and numerical simulation in engineering and design in the development of such machines with rolling guide used.
Prediction of Spudcan Penetration Depth in Multiple Layers with Sand Overlying Clay
Authors: Zhao Jun , Duan Meng Lan , Cao Shi Jing , Hu Zhi Hui , Song Lin Song
Published: March 2011

The conventional prediction of spudcan penetration depth in multiple strata, especially the strata with sand overlying clay profile, usually has a certain deviation with the field data. In this paper, a numerical method was proposed to analyze the ultimate penetration depth for spudcan in the multi-layered profiles with sand overlying clay, and the feasibility of this method was verified by the field data. Comparisons with the approach recommended in SNAME (2002) were also included, and the proposed method showed a significant improvement in predicting spudcan penetration depth in the multiple strata with sand-over-clay profile.
A Petri-Net Approach for Modeling Product Configuration Problems under Mass Customization
Authors: Yang Dong
Published: March 2011

Product configuration is a key enabling technology for implementing mass customization production. In this paper, we present an approach for modeling product configuration problems using Petri Net, a well-defined formalism for describing complex discrete systems. In the presented approach, components within a configurable product are modeled as places of PN whereas structural relationships between components are represented as transitions of PN. Configuration rules such as inclusion and exclusion rules are also described through the elements of PN. By modeling product configuration as a PN, a configuration solution is a set of transitions leading from the initial state of PN to a final state of PN. Therefore, the configuration problem can be solved by analyzing corresponding PN representation.
Virtual Manufacturing and Simulation of Transplanting Mechanism with Non-Circular Gears
Authors: Tao Ye , Yuan Y.C.
Published: March 2011

This article deploys an exploratory development of super rice High-performance transplanter transplanting mechanism with non-circular Gears by dint of rice transplanter transplanting mechanism analog machine accroding to pro/E software.This research is first to building a model of non-circular Gears designed by researcher before,and then assemble the whole to obtain the result of virtual manufacturing with non-circular Gears, and assemble it on the test machine of rice transplanter test machine ,also analysis the Kinematic Principle of Simulation result by pro/E software.Finally, make the motion trail conform to the agronomy requirement according to correcting and consummating the fember unqualified.
Analysis for Softness Abrasive Flow Field of the Greater Curvature of Small Size Tube
Authors: Yuan Qiao Ling , Ji Shi Ming , Tan Da Peng , Zhang Li , Wang Y.C.
Published: March 2011

As it was difficult to solve the near wall characteristics of flow field in softness abrasive flow machining (SAFM) on mould structural surface, a method for simulation the flow characteristics based on the low Re number k-ε model was proposed in this paper. The greater curvature of small size tube was used as specific simulation object. The motion law of particles and related parameters were calculated and the precision machining mechanism of SAFM was discussed. Simulation results show that the micro cutting of abrasive flow mainly appears as the transposition of cutting location influenced by the particle pressure, and as the variation of machining efficiency influenced by near-wall particle velocity. Thus via control of the inlet velocity and its corresponding machining time, it is supposed to work out the machining process according with the machining requirements. By tracking near-wall particles, it can be confirm that the movement of near-wall abrasive particles is similar to stream-wise vortices. The cutting traces on workpiece surfaces assume disorderly arrangement, so the feasibility of SAFM method can be reaffirmed.
Research on Quality Knowledge Learning Oriented to Bearing Manufacturing Process
Authors: Song R. , Wu B.Z. , Wang Y.C. , Nan Xiu Rong , Dong J.X.
Published: March 2011

With the close combination of knowledge management and process quality management, man, as the member of 5M1E, is especially important to the fluctuation effect on product quality. How to improve the comprehensive quality of employees is the core strategy for enterprise to realize the total quality management. Therefore, this study took bearing manufacturing process as an example, expounded the theoretical framework and technological implementation method of system of quality knowledge learning and the system realization interface was given finally.
Machining of Free-Form Surface Base on Cutter Shaft Tilt Method with Ball-End Cutter
Authors: Min Li , Zhang Ke Hua
Published: March 2011

A new tool path generation method based on cutter shaft tilt method was proposed for free-form surface machining by using Ball-end Cutter. Firstly, it introduces the processing quality problems caused by traditional ball-end mill processing. Then cutter shaft tilt was proposed to avoid the above questions. Analyzing the different machining efficiency at the different angle, and then cutter shaft tilt compensation method which based on above method could avoid that problem was proposed. After the paths calculation to a real surface and simulation, the result shows that, comparing to traditional machining method, the new method reduced efficiently phenomenon of extruding and scratching surface. It meets five-axis processing accuracy requirements.
3D Modeling and Open-Close Motion Simulation of the Triple Eccentric Butterfly Valve
Authors: Chen Bing , Fan Yu Guang
Published: March 2011

It was achieved with the benefit of excellent molding function of CAD/CAM, to solve the designing problems of rotation center of triple eccentric butterfly valve and to improve the seal performance. The Solid Edge software is applied to analyze the process of 3D modeling and motion simulation with details, as well as check both static and dynamic interference. In this way, the reasonable eccentric angle α, cone-apex angle 2β, radial eccentricity e and axial eccentricity C of valve board are acquired. It is effective to shorten the design period of triple eccentric butterfly valve, also improve the design efficiency and quality.
Design of Cold Extrusion Die for the Precision Gears
Authors: Hu Guo Jun , Hong Zhi Quan
Published: March 2011

In this paper, the analysis and method of forming for cold extrusion die of precision gears is analyzed. The basic principle and progress of gear closed forming based on exchanging axles on the common hydraulic press are introduced. The mould structure is introduced.
Study on Construction of Tyre Tread Pattern Mold and its Machining with 3-Axis Numerical Control
Authors: Lin Hai Bo , Hu Zhe Guang , Zhao Wen Hui
Published: March 2011

Tyre tread pattern mainly accounts for tyre performance and its endurance. In tyre mold processing, pattern block processing is technologically disturbing, of which the tread pattern is the most challenging. This article first analyses the function conversion of the points from point to plane to space along the tyre tread curve. Aided by GRIP language, it continues to make tread section with spatial curve, and then with the help of UG scanning order, it produces a three-dimensional diorama of accurate tyre pattern. To solve the problem of large errors arising in tyre mold processing with 3 axis numerical control technology, the article proposes a new method to produce tyre tread pattern with 3 axis technology and validates the method. The research contributes to dividing processing of tyre tread pattern, and reducing errors theoretically. Experiments had been done to illustrate that the method can achieve high quality and efficient processing.
Experimental Investigation on the Dynamic Cutting Forces in Internal Broaching
Authors: Tang Y.J. , Wang Yang Yu , Ji S.M. , Zhang X. , Wen Dong Hui
Published: March 2011

Cutting forces generated in broaching have a direct influence on the generation of heat, tool wear or failure, quality of machined surface and accuracy of the work piece. In this paper not only a cutting forces test scheme has been proposed but also a cutting forces measurement equipment has been designed with PCB 740B02 dynamical strain sensor and LMS SCADA III test system, respectively. Dynamical strain sensor was pasted on the cylinder type sensitive elements with which table and workpiece was connected. Experimental investigation on the dynamic cutting forces in the broaching direction of a hydraulic broaching machine had been carried out. Cutting forces measurement tests on Q235 steel workpiece material during broaching had been performed. Broaching in a variety of velocities, namely, 3.3m/min, 5m/min and 8m/min and in a variety of cutting depth, namely, 0.03mm, 0.04mm, 0.05mm and 0.07mm, were investigated. Output signal was analyzed both in time and frequency domains and the key characteristics of the cutting forces signal was obtained. Correlation between the frequency of broaching forces and the broaching velocity was also studied.
Finite Element Analysis for Picking Unit on Scraper-Brush Cotton Stripper Based on Pro/E
Authors: Yang T.L. , Yang H.J. , Zhang Hong Wen
Published: March 2011

Using of Pro/E Integrated Mechanical Structure Analysis Module, the structural analysis of scraper and brush on picking unit under a certain load of stress and deformation and optimized analysis of some primary parts were performed. The size and distribution of stress field were calculated, which could provide references for the physical prototyped and reliability design for product design. Moreover, it optimized the size of scraper and brush on picking unit that has some practical significance for structural optimization design. So the performance of structure of the designed model can be evaluated，researched and optimized in a real working environment.
Design and Performance Analysis of Control System for a Micro-Displacement Platform
Authors: Lin Hai Bo , Yang Guo Zhe
Published: March 2011

It is difficult to balance long travel and high precision, especially in multi-coordinate machining. A stage with nanometer positioning precision is established and the control technologies are studied. Micro-EDM provides the potential feasibility for the nano-scale precision machining. The micro-EDM transmission modular is applied to to complete the discharge process of the servo in the experiment system ,which improves the processing efficiency and the processing quality. The strategy is one part of micro-EDM machine control system, which greatly enhances the positioning accuracy. Results show that the system works well. The system also has many advantages such as quick response, being smooth, ultra low speed and super resolution etc, and meets the needs of micro-EDM control. The research provides a new solution for the design of precision location stages.
Applications of Ultrasonic Radiation Forces
Authors: Wang Z.W. , Pan G.Q. , Wen Dong Hui
Published: March 2011

This keynote paper aims at introducing applications of ultrasonic radiation force in industry. The chosen focus is to understand how to use it. Since the phenomenon of acoustic levitation can reflect the exciting of ultrasonic radiation force directly. The paper starts with an analysis on the tungsten ball floating on a sound field and ultrasonic micro-manipulation study in micro Electronic Mechanical System (MEMS). And ultrasound has been successfully used to degrade wastewater as its cavitation. At the same time, different kinds of micro-ultrasonic machining were used to show how exciting machining and ultrasonic radiation combined. A view from the authors and the final Conclusions show future applications of ultrasonic radiation force.
Dumping Tags Based on Active RFID
Authors: Tao Ye , Geng Shou Fu , Lian Hou Wei
Published: March 2011

In view of the problems that Security personnel who faced with an emergency response can not be timely in the process of duty, we propose and establish a monitoring system based on active RFID technology. The system uses active RFID Reader and the communication protocol between Reader and the host computer to monitor the status of security personnel. Tag’s configuration allows more flexible application of the tag and we can use the configuration to change the parameters of the tag. The tag's size is small and it has flexible applicability and strong adaptability. Test results showed that the tag’s test frequency can be controlled to 10HZ and 400HZ, and monitoring can also set their own threshold. The rate of Reader is 100%, and the tag can launch to about 100 meter. The system not only solves security system faced with an emergency problem, but also for long distance transmission of RFID provides a theoretical basis.
Fixture Design Based on Magneto-Rheological Fluids for Thin Wall Spherical Shell Precision Machining
Authors: Kong Jin Xing , Zheng Yong Cheng , Wang X.K.
Published: March 2011

Thin wall spherical shell is easy to deform at the process of turning because the low rigidity. In order to improve process precision of the thin wall spherical shell, the thought increasing the workpiece technology stiffness is put forward, which the magneto-rheological fluids (MRF) is filled inside the thin wall spherical shells as strengthening phase transition material. In magnetic field, MRF can transform from fluid to solid and solid back to fluid rapidly. According to the thought, the fixture designed is applicable for the thin wall spherical shells process precision. The clamp stiffness can be controlled and the MRF can be used many times. In order to get uniform intensity of the magnetic field in MRF, the special magnetic device is designed which is based on the variable MRF thickness and the magnetic field distributing is analyzed and optimized. The fixture based on MRF will help to improve machining precision of the thin wall spherical shells.
Impact Analysis of Piston Velocity to Cylinders Motion on Pneumatic Impression On-Off Mechanism of Sheet-Fed Offset Press
Authors: Guo Jun Zhong , Yang Jun Ping
Published: March 2011

The impression on-off mechanism is an important part of the offset press, the design and manufacture have relationship with the performance of the printing presses and the quality of the printed products. Pneumatic impression on-off mechanism has the advantages of high position accuracy, reliable and highly automation. This article takes pneumatic impression on-off mechanism as the object of study, the three-dimensional digital model of the impression on-off mechanism is established and the process of on-off pressure is analyzed by using ADAMS software, the piston minimum velocity when the cylinders rotates in different angular velocity is obtained, through simulation, the relation between the motion of impression on-off mechanism and cylinder angular displacement is analyzed. Finally, an important basis to adjust the piston velocity under different speed of cylinders rotation will be provided.
Research on Built-in Adaptive Drilling
Authors: Wang Dong Xing , Chen B. , Zhao C.F. , Sun X.P.
Published: March 2011

For solving the problem of drill breakage and increasing productivity, a built-in adaptive drilling control scheme has been proposed. The torque of the spindle detected using a floating torque measuring mechanism has been regulated by controlling the feed rate of the spindle using PID control algorithm. The adaptive control algorithm has been integrated into a numerical controller. Motor control functions are performed in a timer interrupt subroutine to realize real-time parallel processing. An experimental system has been established. Experiments have demonstrated that the system is applicable in preventing drill breakage and increasing productivity.
Analysis of Imapct of Plate Cylinder Deformation on the Graphic Quality
Authors: Yang Jun Ping , Guo Jun Zhong , Wang X.
Published: March 2011

Plate cylinder is the core component of the offset printing unit to complete the image transfer. The plate cylinder’s deformation will occur under pressure, resulting in the image’s deformation on the plate and the low printing quality. In this article, the three-dimensional digital model of plate, packing and cylinder are established by using solidworks software, they are assembled as a whole, the whole is imported into ANSYS finite element analysis software. The shaft of both sides of the cylinder are fixed, and the contact relations between plate, packing and cylinder body are defined, the pressure are load on the area with 5mm width on the surface of the plate cylinder. After solving, the flexural deformation of plate, packing and cylinder are obtained, through analyzing the axial and radial deformation of the plate, the graphic’s elongation which transferred from plate to blanket are received, consequently, an important basis of researching the image expansion will be provided.
FEM Analysis of an Amphibious Hydraulic Excavator’s Boom and Stick
Authors: Tian F.R. , Han Z.C.
Published: March 2011

Force conducted to boom and stick is analyzed by complicated elements divide of FEM, it shows that the more the box section is, the more load is, and Hinge point’s force is much more than before. If size isn’t be affected, it can be reduced by increasing the sectional area. FEM analysis and design comparison analysis results show that FEM analysis method is feasible to amphibious hydraulic excavator. FEM analysis of results to practical design provides a practical way and means for the process of other construction machinery design analysis.
Robot Avoid Obstacle Automatically Based on Fuzzy Control in the Process of Tracing
Authors: Yan X.D. , Guan H. , Cui Y.F.
Published: March 2011

Infrared sensors and fuzzy control integrates in this article, which is used to avert obstacle. It overcomes some difficulties in avoiding obstacle quickly and efficiently in some unknown environment. The environment model which is difficult to set up in the traditional control strategy can be prevented to establish by fuzzy control strategy. Simulation results in a virtual environment have shown the effectiveness of the fuzzy control strategy.
A Product Configuration Optimization Method Based on Non-Dominated Sorting Genetic Algorithm
Authors: Sun W.H. , Lu W.C. , Lin D.Y.
Published: March 2011

In order to realize the complex product rapid configuration design in the environment of mass configuration (MC), the non-dominated sorting genetic algorithm (NGSA) for product rapid configuration design is proposed in this paper. The model of multi-objective product configuration optimization is established, and hierarchical analysis is made for configuration design. By comparing the similarity and integrity of requirement and instance, the sequence of retrieval instances is given according to the reuse degree, and multi-objective optimization configuration based on NGSA is realized. Finally, the validity and practicability of the method is verified by an instance which is applied in rapid configuration design of the drive module of tuyere puncher.
Design on Single Stage Reciprocating Air Compressor Based on Virtual Prototype Technology
Authors: Zhou Jian Qiang , Zhou Zhao Zhong
Published: March 2011

The design of the virtual prototyping frame construction, the work flow and its method of the realization on the air compressor are to be elaborated. Based on the analysis of the structure of air compressor operating mechanism, the 3-dimension model and virtual assembly of this product were done by CAXA solid design software. The assembly file of operating mechanism in CAXA was imported into ADAMS by parasolid transmission standard, kinematics simulation of operating mechanism of the reciprocating air compressor was realized.The design cost is reduced and the design cycle is shorten through this method. the research results have reference value to the design and simulation of similar parts.
Interactive System for T-Learning: Introduction of iTV Edutainment Mode
Authors: Wu Jiang , Zuo J.W.
Published: March 2011

This paper introduces a new education mode system named as T-learning, which converges with two technologies: iTV and E-learning. After the initial discussion about the potential of T-learning, a basic system mode will be proposed. Then we modify it according to the SCORM standard, and also descript a system evaluation for functionality testing. The main objective of this paper is to establish an interactive system for the home learning and exploit a potential business possibility for T-learning service.
Research into the Interactive Design of Touch-Screen Mobile Phones’ Interface Based on the Usability
Authors: Zhang L.F. , Liu D.D. , Qiao X.X.
Published: March 2011

Since its first launch by Apple Inc in 2007, touch-screen mobile phone has witnessed a rapidly growing number of its users, which calls for new requirements in the interactive design of its interface. This paper probes into the current development of touch-screen mobile phones, analyzes the present situation of the interactive design of its interface and its developing tendency and points out its limitation and deficiency on the basis of that.
Technology of Bipolar Plate Flow Field’s Geometric Design and Processing of Proton Exchange Membrane Guel Vell
Authors: Lu Chong Da , Wang J.J. , Wen Dong Hui
Published: March 2011

Proton exchange membrane fuel cell (PEMFC) has high power density and energy conversion efficiency. Bipolar plate is one of the key components of the proton exchange membrane fuel cell, not only affects the performance of the battery, but also affects the cost of the battery, which is become a bottlenecks. This paper introduces several common forms of the bipolar plate flow channel of the PEMFC, analyzes their advantages and disadvantages, and then some new type of flow channel type comes up after improvements on this basis, so the future development trend of fuel cells summed up is combined with bionics or using a complex flow field. An overview of the commonly used material and processing of the bipolar plate, respectively, graphite sheet, sheet metal and composite bipolar plates.
Situations of Fluid Polishing Processes for Ultra-Smooth Surface
Authors: Pan G.Q. , Wang Z.W. , Wen Dong Hui
Published: March 2011

This paper give some literatures for the technology of fluid polishing. Methods of fluid polishing using for optics curved surface, ultra-smooth plane and inner surface of non-circular curved surface. Each method is explained by above classifications, and some domestic cases which can produce ultra-smooth surface in different conditions, parts and technical parameters is listed and evaluated.
Band Structures and Optical Properties of CBOB Crystal Material Based on First-Principles Study
Authors: Lin Chen Sheng , Cheng Wen Dan , Zhang Wei Long
Published: March 2011

Using the first-principle DFT method, the band structure and density of state are investigated. Then using the anharmonic oscillator model, the linear and nonlinear optical properties of frequency dependence are calculated for CBOB (Cd4BiO(BO3)3) crystal material. It is shown that the calculated SHG coefficient is well matched with our experimental value at a wavelength of 1064 nm, and a large nonlinear optical response originates from the charge transfers within the irregular BiO6, CdOngroups and BO3group for Cd4BiO(BO3)3.
Nanostructured Material with Localized Magnetic Enhanced
Authors: Zhao Hua Jun , Yuan Dai Rong
Published: March 2011

The nanostructured material of the metal–insulator–metal (MIM) grating with localized magnetic enhanced is designed by the inductor and capacitor (LC) circuit model. It’s shown that the electromagnetic field can greatly be enhanced when the magnetically resonance is excited. The characteristics of the localized magnetic resonance are discussed. Furthermore, the LC circuit model can be easily used to design the MIM grating for localized magnetic resonance. The geometry parameters predicted by LC circuit model match well with the results simulated by rigorous coupled-wave analysis method.
A Model of Threshold Voltage in FinFET
Authors: Liu Jian , Li Li , Zhang X.H.
Published: March 2011

A physics-based threshold voltage model is proposed, according to the electrostatics distribution in Si body of FinFET which is obtained by 2-D numerical simulation. Threshold voltage of FinFET calculated from the model is matched with results of numerical simulation. Influences of polysilicon gate doping concentration, Si body doping concentration, the width and height of Si body and the gate oxide thickness on threshold voltage were investigated. As results,Si body doping concentration, gate doping concentration and the width of Si body have been found to be the most important parameters for the design of threshold voltage of FinFET-like devices.
Application of Two-Component Pressure Sensitive Paint in Transonic Wind Tunnel
Authors: Zhang Yong Cun , Chen Liu Sheng , Shang Jin Kui , Ma Xiao Guang , Chen Xue Yuan , Yan Li , Zhao Wen Tao , Deng Xue Ying , Cheng Hou Mei
Published: March 2011

As a new optical pressure sensor technique, Pressure Sensitive Paint (PSP) is one of the important techn iques for model surface p ressure m easurement in wind tunnel test s . With the help of PSP , it is possible to do p ressure m easurement on compl icated or special model surface , which is usually difficult to be measured by pressure tap s . Since PSP technique being introduced into China from TsAGI (Russia) , AVIC ARI has investigated two-component PSP technique in high-speed wind tunnel in cooperati on with ICCAS China . T his report present s the principle of PSP technique, test control system development and the test result comparison s between PSP technique with two-component pressure sensitive paint FOP-2 and classic tap measurement on wing surface of an airplane model . T he results showed that the two-component pressure sensitive paint has better performance and can be used for model pressure measurement.
Three-Dimensional Temperature Field Numerical Simulation of Twin-Arc High-Speed Submerged Arc Welding Process Based on ANSYS
Authors: He Kuan Fang , Li Xue Jun , Wu Ji Gang , Li Qi
Published: March 2011

Based on analysis of submerged arc welding arc heat source model and droplet heat inputting uniform distribution, ANSYS parametric design language was applied to develop sub-program for loading moving heat sources. ANSYS software was used to calculate the temperature fields. In the same welding conditions, weld seam width and depth value of experiments and simulation are contrasted, the biggest error was below 5%. The influence of different welding speed to molten pool temperature of twin-arc submerged arc welding was analyzed, it obtained results that temperature field distribution of twin-arc submerged arc welding changes more gentle than single arc submerged arc welding in condition of increased welding speed, it was helpful to the further analysis of molten pool dynamic behavior and weld seam shape factors of twin-arc high speed submerged arc welding.
Research on Acoustic Emission Model of Rotor Crack Propagation
Authors: Li Xue Jun , Deng Zong Qun , Wu Ji Gang
Published: March 2011

From the basic theory of fracture mechanics and combining the fatigue mechanism of rotor crack propagation, energy theory and power relationship, the stress analysis and deformation of the rotor are discussed, and the acoustic emission mathematical model of the rotor crack propagation is deduced, which will provide the theoretical basis for the further study of the acoustic emission in the rotor crack fault detection.
Welding Residual Stress's Numerical Simulation and Relieving of Guyed Mast Earplate Joint Substructure
Authors: Wang Wen Li , Qu Wei Lian , He Jie
Published: March 2011

The dynamic stress-strain and welding residual stress during welding are the significant factors which lead to welded cracking and debasement of the joint properties. Therefore, the welding residual stresses are still very importang problems.A large number of guyed mast accidents study shows that the welded joints of earplate and shaft were easily to be destroyed. Therefore, the accurate assessment of the guyed maste earplate joint substructure’s welding residual stress is of great significance. The theory and method of simulation of the welding temperature field and welding stress field by finite element method is first introduced, and then the earplate substructure refine model is established which was up to the welding numerical simulation. Based on ANSYS software’s APDL language to apply the welding heat source load, we can get and save the welding temperature field results at each time. Conversing the thermal analysis element into structure element to finish the caculation of the welding stress field. Eventually by adopting the elimination remnant technology to remove the part of welding residual stresses, we can got the final welding residual stress in different relieving proportion.
Design and Realization Real-time Edge Detection System Based on DM642
Authors: Xiao W.H. , Wan X. , Zhang Z.M. , Liu R. , Lu X.Y.
Published: March 2011

This paper introduces the design of a DSP-based video image acquisition and real-time processing system. In this paper, as the main embedded processor TMS320DM642 build real-time edge detection hardware platform. TVP5150PBS video decoder is adopted to acquire video signal and data stream ,and CPLD device is configured for system logic Control, achieve real-time video image acquisition and processing. Experiments show that the system can effectively carry out edge detection, to meet the real-time. The research is supported by the Key Laboratory of Nondestructive Test Ministry of Education. The author appreciates the state natural science fund(60577016), Aero-Science fund (2009ZD56008) and province fund (2009GZW00251).