bluuebunny/crossref_metadata_2025 huggingface dataset:
The Cleaning Mechanisms on Organic Grinding Fluid Applied for Si3N4 Ceramic Grinding
Authors: Wu Zhi Yuan , Wang Shu Hui , Tian Xin Li , Zhang Shu
Published: November 2010

A series of experiment were performed to test the cleaning ability of different organic emulsion for Si3N4 ceramic grinding. The experiment results showed that the grinding fluid made by short chain organic substance and alkane will induces the jam of grinding wheels. At the same time, polar organic substance with long carbon chain can suppress wheel loading phenomenon. The main reason of the jam by alkane is the nonpolar oil film surface possesses the strong attraction to abrasive dust of Si3N4, which will lead to jam in the grinding process. The polar oil film relieves the aggregation of abrasive dust in the grinding area to some extant, which is beneficial to decrease jam. By analyzing the cleaning property by some types of polar organic substances, the paper discusses the relationships of molecular structure characters to their cleaning ability.
The Evaluation of Resources and Environment Attributes of Manufacturing Process Based on Scatter Degree Combination Evaluation Method
Authors: Zhang Hua , Zhang Xu Gang , Wang Yan Hong
Published: November 2010

In order to evaluate the resources and environment attributes of manufacturing process, an IPO model and an evaluation index system are presented first. And then scatter degree combination evaluation method is proposed to solve the inconsistency produced by different evaluation methods. The evaluation results are more accurate by integration of several evaluation results and evaluation information of other evaluation methods. In the end, the validity of the method is confirmed by an example, evaluating a valve body’s resources and environment attributes of manufacturing process.
The Fracture Analyse of Titanium Bone Implant
Authors: Lou Bai Yang , Liu Chun Lei , Xu Bin
Published: November 2010

The titanium and its alloys are getting used more and more as for human implant in recent years. In this paper, the broken titanium palmer-bone implant was investigated with field emission scanning electron microscopy (SEM) and X-ray spectrometer and then the reasons of implant fracture was researched. The material composite analysis result shows that the implant is made of industrially pure titanium in which the microelements aluminum, calcium and vanadium are on the high sides. The macro analysis result indicates that the implant did not deform remarkably before cracking. The micro analysis result indicates that there is coarse crystalloid fracture in the SEM macrograph, suggesting that the implant material has low fracture strength. The implant fails in mixed cleavage fracture and intergranular fracture accompanied by fatigue fracture in part region, suggesting that the main fracture type was brittle fracture.
Analysis on Green Design Methods in Modern Furniture
Authors: Xu Ji Feng , Zhang Han Ning
Published: November 2010

With times of ecological civilization coming, Green design is becoming a new horizon of modern furniture innovation and development. This study explored the strategies, methods and procedure of modern furniture green design, and described the framework of implementation. The procedure model of modern furniture green design were also analyzed and built.
The Monitoring of Machine Tool Working State Based on Load Current Signal
Authors: Yu Guang Lin , Li Guo Fu
Published: November 2010

According to the characteristic of machine tools such as complex driving chain and enclosed housing, this paper selects current signal which is easy to sample as the analytical signal. As the machines tools use different driving chain in different work state, this will affect motor current of machine tools; that is, the characteristics under different working conditions will be included in the current signal. This paper chose wavelet packet decomposition to analyze the current signal, then extracted wavelet packet coefficients of different frequency bands, by the change of wavelet packet coefficient to determine the machine's working condition. From the analysis of lathe current signal sampled in the experiment, it indicates the validity of wavelet packet coefficients as a feature quantity of the machine condition monitoring.
The Research on the Microstructure and Property of Gear with Sinter Powder Material
Authors: Lou Bai Yang , Dong Fang Liang , Xu Bin
Published: November 2010

Gear is a widely used common part of machinery, which is of good lubricate property and low materials consumption when it is made of sinter powder material. In this paper, the chemical composition, microstructure and property of sintered gear were investigated with optical microscope, scan electronic microscope, micro hardness meter and X-diffraction energy spectrometer. The results show that the microstructure of the gear includes of tempered martensite, carbide, residual austenite and a small quantity of cavity. The distribution of iron element is even. The copper and nickel distribute unevenly and cover around the surface of carbide in gear material which makes different property of covered layer itself between carbide and base material. The existing of covered layer and weak grain-boundary strength are main reason for gear brittle fracture. The gear’s toughness can be increased by optimizing sintering technology and heat treatment.
The Stress and Strain Analysis in the Broadening Stage of Multi-Wedge Synchrostep Rolling Railway Axle by Cross-Wedge Rolling
Authors: Shu Xue Dao , Xiao Min , Li Chuan Min , Hu Zheng Huan
Published: November 2010

The broadening stage is the main stage in Multi-wedge Synchrostep Rolling railway axle by Cross-wedge Rolling. Based on the rotated theory of Multi-wedge Rolling, through using Ansys/Ls-Dyna FEM software, This paper provides a systematic analysis of the stress-strain in the broadening stage of Multi-wedge Synchrostep Rolling railway axle by Cross-wedge Rolling. Through this study, it is obtained the stress-strain distribution and evolution on Multi-wedge Synchrostep Rolling railway axle by Cross-wedge Rolling. These research conclusions can provide scientific basis for Multi-wedge Synchrostep Rolling railway axle by Cross-wedge Rolling.
Theoretical Analysis of Granularity of Grinding Particles on Mixing
Authors: Deng Yuan Chao
Published: November 2010

Uniformity on mixing several types of granules is closely related to particle sizes, especially when microcomponents are involved. In this article, we report our theoretical analysis on the relationship between the uniformity and granule sizes using the principles of probability and statistics. New computational formulas that relate the coefficient of variation and granule sizes have been deduced. Classical formulas usually require the sizes of all granules to be the same. This restriction has been removed in the new formulas, which can be applied to any granule sizes. Using these formulas we have performed calculations on the normal distribution and logarithmic normal distribution using common granule sizes.
Topology Optimization on the Movable Platen of Plastic Injection Machine
Authors: Huang Hai Bo , Xue Dong Hui
Published: November 2010

Movable platen is key component of a plastic injection machine. In this paper the movable platen of HBT80X/1 plastic injection moulding machine is redesigned using topology optimization method. The SIMP method and OC method were applied as the optimization principle and Optimality Criteria. After given the topology structure, the refined structure is designed with experience. The results show that the weight and maximum placement of the new shape were 53Kg and 0.009mm less than the original design.
Wind Load Analysis and the Structure Optimization Design of the Steel Structures with ANSYS
Authors: Meng Zhao Xin , Zhao Jian Xin , Wang Shu Yang , Zhou Nan
Published: November 2010

In recent years, the bio-oil, as a new kind of clean energy, has been paid with more attentions and has been in rapid development. Meanwhile, the design and research of the bio-oil equipment also has made a great progress. This paper presented the research of the main unit installed steel structure which was with the 3000t yearly capacity. It analyzed and researched the structure and load characteristics of the bio-oil main unit installed steel structure. According to the related research theory and design standards, by using software ANSYS establish the three-dimensional model of the main unit installed steel structure. The paper also analyzed and calculated the wind load. The model structure has been optimized on the foundation of the analyzing preliminary model foundation. The stability of the equipment has been enhanced.
Application of Analog Compound Orthogonal Neural Network to Temperature Control of Electric Heating Dryers
Authors: Wei Hong Ling , Gu Lin Gang
Published: November 2010

A direct temperature control method for electric heating dryers was proposed in order to obtain satisfactory control effect. The controller of analog compound orthogonal neural network used a direct adaptive control method. Simulation results show that this controller has higher speed performance and smaller overshoot than a PID controller. It is suitable for the control of uncertain objects and provides a novel approach for the control of uncertain systems.
Behavioral Characteristics of Electromechanical Products and Their Representation Based on a Modified Petri Net
Authors: He Hua Bo , Wang Ke
Published: November 2010

Behavioral characteristic is one of the important targets in conceptual design and re-design of electromechanical products. To summarize the knowledge of behavior characteristics of electromechanical products, this paper proposed the concepts of behavioral effect, elemental behavior and behavioral chain. It made the modification to classical Petri nets, then analyzed and expressed the behavior characteristics using the modified Petri nets. Finally, a case study of an electric nail-gun was conducted to demonstrate the feasibility of the proposed methodologies.
Biomimetic Micropore of Bearing Human Bone in the Design and Optimization Based on Finite Element Analysis and Simulation
Authors: Yang Li Jun , Dang Xi Nan , Wang Li Li , Zhou Lian
Published: November 2010

Modeling, design and fabrication of tissue scaffolds with intricate architecture, porosity and pore size for desired tissue properties presents a challenge in tissue engineering. Based on comparison and analysis of the two kinds of existing unit cells, the new micropore unit cell with a sphere hole in the middle and three cylindrical holes in the edge was gained. The negative model of bearing human bone was designed according to the new unit cell. Boolean Operation to the negative mode and entity contour profile, then the interconnected scaffold of artificial bone with certain porosity and gradient micropore was obtained. The results of simulation show that the average modulus of the model is 8.5Gpa, and the porosity is from 25.8% to 42.7%. It can meet the mechanical and biomimetic requests of bearing human artificial bone.
CAD System of the Cold Extrusion Die Based on VB
Authors: Zhou Si Zhu , Yuan Xin Mei , Fan Jie
Published: November 2010

The CAD technology at home and abroad is analyzed. The necessity in research and development of cold extrusion die CAD system is proposed. CAD system of the cold extrusion die based on Visual Basic Programming platform is established. And in the CAD system, the functions such as tool set design, process analysis, optimization design of the cold extrusion die can be achieved. Reliability of the CAD system is tested by the instance of a bike steel bowl.
Computer Numerical Controlled Coil Winding of the Electric Welding Machine
Authors: Wang Yi Qiang , Wang Xia Jun , Hua Shun Ming
Published: November 2010

Based on the analysis of the disadvantage of present wire winding of the coil of electric welding machine, this paper studies thoroughly the keys to the problem of the wire winding of the coil of electric welding machine. By designing a new computer numerical controlled wire winding system for the coil of electric welding machine, it can promote greatly the wire winding efficiency, and assure the performance and the stability of the coil of electric welding machine.
Concept Design of Spraying System Based on Function Analysis of Spraying Robots
Authors: Zhao Wei Min , Hu Bin
Published: November 2010

According to the basic theory and method of concept design for products, the basic operational requirements of spraying robots were abstracted as its general performance, and the functional elements were obtained by applying the method of function tree and decomposing the sub-function. The function structure drawing of spraying system was established, and the principal solutions to functional elements were obtained. Then the combination of principle solutions to spraying robots were obtained by the application of the morphological matrix, three relatively reasonable principle solutions were chosen according to the compatibility and matching of the function solution.
Cost Estimation Model of Modular Product Family
Authors: Wang Hao Lun , Hou Liang , Liu Cai Rong , Wang Qi Liang
Published: November 2010

For the more effective cost management and control of product platform, on the basis of modular product family (MPF) realization process and the cost of product family, the cost estimation model of modular product family was proposed. The manufacturing and management cost of component part level, module level and product level was estimated, and summed up to the cost of product family. Finally, a case of wheeling loader product family was illustrated to demonstrate the validity of the model.
Cutting Process Analysis for Uniform and Variable Edge Tools
Authors: Li Zhao , Yu Ai Bing , Wang Hao , Dong Liang
Published: November 2010

Tool edge geometry has obvious influences on cutting tool behaviors. FEM modeling and simulation of orthogonal cutting process using uniform and variable edge cutting tools were studied with dynamics explicit ALE method. AISI 1045 steel was chosen for workpiece, and cemented carbide was chosen for cutting tool. Three sections of uniform and variable edges were chosen for analysis. Cutting forces and temperature distributions were calculated for uniform and variable edge carbide cutting tool. Simulation results show that variable edge cutting tool obtains small cutting forces. Ploughing force tends to reduce when variable edge cutting tool was used. Variable edge cutting tool reduces the heat generation and presents reasonable temperature distributions, which is beneficial to cutting life. The force and temperature distributions demonstrate the advantages of variable edge cutting tool.
Debond Propagation in Honeycomb Structure under Pure Bending Load
Authors: Gong Wen Ran , Chen Jin Long , Wang Jiao
Published: November 2010

This paper used Finite Element Method to investigate the influence of the circular face-core debonding dimension on the further debond propagation under the pure bending load in honeycomb structure. We also summarized the debonding rules and looked further into debonding area effect on the critical load for debond propagation. The conclusions are as follows: For a honeycomb panel, there exists a certain debonded radius . When the initial debonded radius is greater than , it will experience local buckling which takes the form of snap-through buckling. The debonding propagation is only discovered on the wide direction of the plate. The critical load for debonding propagation decreases with increased debond size.
Design of Forming Shape Measurement System for Laser Molten Pool in Laser Fabricating
Authors: Lei Jian Bo , Wang Zhen , Liu Li Feng
Published: November 2010

In order to study forming shape distribution of laser molten pool in laser fabricating, a CCD-based image detection system was developed. The system mainly consists of a CCD-based detector, optical elements, an image acquisition card and its special software. Experiments on shape measurement of the laser molten pool were carried out. It was shown that 2D morphology and the dimension of laser molten pool could be measured in real time. The (X, Y) dimension of the laser molten pool in laser cladding was (2.6 mm, 2.5 mm) with an approximately ellipsoidal shape. Laser cladding parameters were optimized according to the measurement results. It was a non-destructive measurement method, which would be a new method for online measurement and feedback control in laser fabricating.
Design Research on Working Mechanism of Beam Pumping Unit
Authors: Liu Jun , Zhu Jiang
Published: November 2010

Based on the unique geometry and mechanical movement of beam pumping unit, this paper presented a simple swing equation and computed motorial parameter, meanwhile under the conditions of the static load and inertial load of the polished-rod of a conventional pumping unit, it also presented an equivalent dynamic model of the pumping unit system and the type-curves of net torque of the crankshaft with the characteristic of inertial counterbalance having been computed, the model can provide a theoretical base for study on the other transient working parameters of beam pumping unit. Being satisfied with motion accuracy and boundary constraints, the optimization model of beam pumping unit is established. The simulated annealing algorithm with penalty strategy is adopted to solve the optimal model, so that optimization process was simplified and the global optimal solution is ensured reliably.
Design Study for Parallel Robot Based on Virtual Prototyping
Authors: Chen Hong Liang , Hong Lin Rong , Wang Tie Liu , Lu Kong Bao , Luo Yu Feng
Published: November 2010

The cost of development for physical prototypes of parallel robots is high and the optimization cycle is long. The optimum method of high efficiency is explored. A virtual prototype model of 3RPS is established to analyze how the rotational angle of the robot is affected when the parameters of the robot vary. The results show that it is a good method and easy to be used in practice. The optimum parameters are obtainned for the workspace indicating that rotational angle is the best one.
Development of Electromagnetic Composite Ring Expansion as a Fragile Material Test Technique
Authors: Zhou Gang Yi , Liu Jun , Dong Xin Long , Zhou Feng Hua
Published: November 2010

A method is described for performing the tensile strength of fragile material studies using electromagnetically launched expanding composite ring. The working principle is analyzed, where a fast-discharge capacitor system generates magnetic forces between the solenoid and driving ring, which accelerates radial velocities of the specimen rings. The dynamic measuring methods of instantaneous current and mechanical testing are established for analysis of electrical character and tensile strength of fragile specimen. The current pulse was tested experimentally which was provided by a capacitive discharge with the load solenoid connected in series with the power supply alone. It is shown that experimental results match the theoretical analysis well.
Dynamic Performance Analysis of a Machine Tool Considering Linear Rolling Guideway
Authors: Zhang Yao Man , Xie Zhi Kun , Liu Qi Wei
Published: November 2010

The linear rolling guideway is one of the most essential parts of the machine tool. So it is very important to analyze the dynamic-static characteristic of the machine tool by considering rolling guideway for the study of the effect on machinery function. The research is based on a NC machine tool produced by a certain plant of machine tools. In this study, methods of simulating the rolling guideway support were studied; and the configuration of the spring damper elements of the bearing supports were investigated. The finite element analysis on the CKS6125 machine tool was used to confirm its dynamic characteristics. The finite element analysis models were validated by some experiments.
Enterprise Cluster Entity Modeling Based on Product
Authors: Sun Li , Yu Jun He , Zhan Hong Fei , Xu Yi
Published: November 2010

Starting from the product life cycle, this paper established the modeling of enterprise cluster entity at the base of analyzing the various products of the enterprise cluster. The modeling comprises the process dimension, resource dimension and organization dimension. Every dimension was expressed by the analysis of product view. Then, based on the complex network theory, we obtained the distribution of the products by the product network. Finally, we got the relationship of enterprise cluster entity from the result of the product network.
Feature-Based Collaborative Design in VPDM
Authors: Liang Ke Shan , Shang Jian Zhong , Tang Li , Cao Yu Jun , Cheng Chen
Published: November 2010

Based on present research states and new problems of current collaborative design (CD), the paper presents a solution of building Virtual PDM (VPDM) for developing a CD platform on heterogeneous CAD and PDM systems among enterprises. Firstly, VPDM definition and characteristics are put forward, the CD framework in VPDM is proposed and each component of VPDM are analyzed. Secondly, operations and features in CAD are described with Express-G, a unified feature model is built and mapped into database mode. And then, feature-based CD sequence diagram, clients’ status and feature expression are introduced in VPDM environment. At last, prototype system developed using above method makes CD come true in two commercial CAD systems and two commercial PDM systems, which proves that our approach works well.
Finite Element Static Analysis on Heavy-Duty Truck Gearbox Housing
Authors: Fu Jing Shun , Wang Jun Feng , Wang Jin
Published: November 2010

The heavy-duty truck’s gearbox housing is studied in this paper. The analysis model is built with finite element software. MPC (multipoint constraint) contact algorithm is used to simulate the connections between different gearbox housings. The strength and stiffness of gearbox housing is calculated at its low-speed load case in the first gear. The contour of the stress and displacement is obtained through the calculation results. The results show that the housing meets the design requirements and it provides a reference for optimization and improvement of the gearbox housing.
Influence of Direct Current Magnetron Sputtering Parameters on Electrical Properties of Copper Films
Authors: Hua Yin Qun , Chen Rui Fang , Niu Zhong Xiu , Yu Jie
Published: November 2010

Cu thin films were prepared by DC magnetron sputtering on Si substrate, and the resistivities change by adjusting its sputtering parameters. It is found that the changes of the sputtering power and substrate temperature and working pressure can affect significantly the Cu film resistivity (ρ). The Cu films resistivity decreases with the increasing of sputtering power. As the substrate temperature “structure zone model” effect, the Cu film resistivity decreases when the substrate temperature was less than 150°C. The resistivities (ρ) begin to increase gradually at various temperatures ranging from 150°C to 300°C, but the rate of increase is not significant. The resistivity abnormal increases when the substrate temperature was 400°C. The Cu films resistivity increases with argon working gas pressure ranging from 0.15 Pa to 2 Pa.
Influence of the Position Deviation of Rotated Dual-Plates Lapping on Sphere
Authors: Zhao Ping , Fan Hong Wei , Chen Jia Jie , Yuan Ju Long , Lv Bing Hai , Deng Qian Fa
Published: November 2010

To improve the sphericity and processing uniformity of precision ball, Simulations and analysis of the mechanism Position Deviation of Rotated Dual-Plates Lapping on precise Sphere, it can be indicated that mechanism Position Deviation (down plate axial deviation and down plate radial deviation) have little disadvantageous influence on sphericity and processing uniformity.
Injection Molding Flow Simulation of Thin-Walled Slender Tube and Optimization of Combined Cavity
Authors: Liu Jun , Wang Gang Ming , Sun Bao Shou
Published: November 2010

Thin-walled slender tubes are produced by injection molding, where there might be defects such as short shot, excessive warpage and uneven temperature distribution. In this paper, injection process analysis was carried out. The 3D modeling technology of Pro/E established a solid model of thin-walled slender tube. MPI (Moldflow Plastics Insight) was used for executing injection molding flow simulation. Gate location and gate number was optimized. Filling system and cooling system of the combined cavity was optimized by analysis of flow, cool and warp. The results can be used for supplying reliable data of mold designing and manufacturing, reducing the engineering mold trial time, decrease the manufacturing cost. The configuration and dimensions of the injection gate can be determined by the computer program before the molds are actually manufactured. The potential defects were forecasted. Therefore, the designers can quickly optimize the mold design.
A Study on Methodology to Collect Customer Requirements through the Internet
Authors: Liu Sheng Li , Shen Fa
Published: November 2010

Timely and accurate access to customer requirements is one of the vital elements of the customer-centric business strategy of modern enterprises. After comparisons of different methods of surveying product and market requirements, we propose to use the Internet information through well-constructed websites to utilize the techniques and methods of collecting customer needs and combining with actual cases in order to provide the basis for new product development in enterprises.
Joint Detail Simulation by Beam Element in Vehicle Body
Authors: Hou Wen Bin , Zhang Hong Zhe , Hu Ping , Pan Xing Chen
Published: November 2010

The simulation of joint is pivotal for car body structural analysis in concept design phase. The detail simulation method was implemented by solving the detail joint model using non-decoupling method. The detail information was afforded about joint detail modeling and the process of non-decoupling. The process of solving the parameters of joint was also described with equations. By the solved parameter values, the joint concept was built with ball hinge elements and spring elements. At last, a comparison between concept model with detail joint simulation and detail model of car body shows that the detail simulation method in this paper is feasible and accurate.
Microstructure and Interface Strength of MMCs Prepared by Pressureless Ni-Induced Infiltration Using Fe Alloy
Authors: Yang Shao Feng , Chen Wei Ping , Han Meng Yan , Zhu De Zhi
Published: November 2010

Metal matrix composites (MMCs) were produced by Ni-induced pressureless infiltration using Fe alloy. The mainly fabrication process was that Ni and Al2O3 powders mixture was pressed and sintered after milled, and then the sintered Al2O3 ceramics were infiltrated by Fe alloy at 1600°C with 4h holding time. While the SEM and EPMA analyses indicated that the interface between ceramics and Fe alloy reaches a full homogeneity after infiltration and Fe alloy could infiltrate Al2O3 ceramic preforms and the maximum infiltration distance was more than 400 μm. This would increase the strength of interfacial due to excellent bonding interface. The fracture strength is about 63.0 MPa.
Modular-Based Platform Planning for Product Family
Authors: Fan Lei , Zhao Li Ping , Yao Yi Yong
Published: November 2010

It is crucial to solve the conflict scale economies and product variety for product family plan. Therefore, from the view of functional parameters and structural characteristics of product family, a strategy was studied to work on product variety optimization and modular platform-based design based on similarity analysis. First of all, PCA (Principal Component Analysis) was performed to identify the key functional parameters. And then, a cluster analysis and a similarity analysis were carried out to provide a similar estimation for the products. Finally, according to the comprehensive analysis it would be helpful to layout the modular platform.
Numerical Fitting of Processing Load and Downward Movement of Semi-Fixed Abrasive Plate
Authors: Lv Xun , Yuan Ju Long , Lu Chong Da
Published: November 2010

Semi-fixed abrasive plate (SFAP) lapping is an effective ultra-precision lapping method. It can efficiently obtain good surface quality in ductile regime machining. Probability density function of abrasive grains cutting depth is the key factor to control removing mode. This paper focused on the relationship between processing load and downward movement of the workpiece, which was important equation in probability density formula of abrasive grains cutting depth. By using loading test on pressure tester and numerical fitting method, the relationship can be expressed by different order polynomial formula, and the fitting curves were very close to experimental data.
Accuracy Analysis and Simulation of Three Degrees of Freedom Parallel Machine Tool
Authors: Li Xing Shan , Wang Jun , Cai Guang Qi
Published: November 2010

This paper proposes a novel three degrees of freedom parallel machine tool. The parallel machine tool consists of three serial chains and a fixed base and a moving platform which can be moved in a pose space corresponding to the three degrees of freedom. By using matrix methods, a error model of the parallel machine was developed. The explicit solution of the error of joint and the stroke error of telescopic link were solved for analysis of influence factors of error on the position of moving platform. It provided a theoretical foundation for error compensation of parallel machine tool.
Adaptable Redesign of Existing Equipment Responding to Unanticipated Environment Changes
Authors: Liu Zhi Jie , Teng Hong Fei , Hu Qing Hua
Published: November 2010

Complex equipment usually needs to be designed according to a working environment, for example Tunnel Boring Machine (TBM). But the environment can change in an unanticipated way, which usually leads to inferior performance for equipment and ultimately results in a great loss. Thus how to rapidly respond to unanticipated environment changes (UEC) is an important issue to be resolved for existing products. This paper discusses the adaptable redesign of existing equipment, which performs adaptation or adding new components in existing equipment, avoids redesigning or remanufacturing new equipment so as to quickly meet expected performance requirements. For a complex equipment with many interrelated parameters, there might exist couplings and even contradictions in the redesign. And it is difficult for engineers to determine how changes in certain parameters affect the system performance. The key issues of the redesign are discussed including function-structure analysis, structure change propagation prediction and contradiction resolving. The design issue is analyzed in an existing TBM responding to unanticipated ground changes.
Optimization Design of Powder Molding Pressing Frame Based on Precision Effect
Authors: Liu Jun , Dong Xin Long , Zhou Gang Yi
Published: November 2010

The large deformation of powder molding pressing machine in the load affects the accuracy of the machine. The model of powder molding press was simplified by finite element method. ANSYS software was employed to simulate the location of the frame deformation in load, deformation and stress distribution of the real case. The sizes and structures of the powder molding pressing frame were changed, such as adding stiffeners on the both sides of the frame support shelf to improve the support plate bending rigidity and resistance to flex capacity. The results showed that the increasing thickness of the steel plate can reduce stress concentration. The overall deformation reduced from the original 0.361688mm to 0.254033mm. The maximum deformation area transferred from the support rack of the frame to the edge of mold shelf. The deformation of Y direction is reduced from 0.336271mm to 0.186853mm. The optimized deformation of the rack and the mold shelf significantly is reduced.
Air-Lubricated Pneumatic Workbench
Authors: Wu Chu Han , Wan Shu Min , Lin Bin
Published: November 2010

The air-lubricated pneumatic workbench introduced in this paper is used in rotary ultrasonic machining which are widely used to machine hard and brittle materials. It is necessary to use special ultrasonic machine tool for rotary ultrasonic machining in the traditional ultrasonic machining, limiting the application of ultrasonic machining. A new type of rotary ultrasonic grinding cutter is developed, which can be mounted on the general purpose machine tool used to machine the hard brittle materials. The air-lubricated pneumatic workbench on which the workpiece is fixed can be used to precisely control the force between the workpiece and rotary ultrasonic grinding cutter when machining. Based on the experimental results of the pneumatic workbench which has been manufactured we find that the force between the workpiece and rotary ultrasonic grinding cutter can’t be easily controlled for the rolling bearings used in such workbench and the rolling friction force between the rolling bearing and guide way. This paper describes a novel pneumatic workbench where we replace the rolling bearing with air bearing which introduces essentially zero friction between the air bearing and guide way. The stiffness of the air-lubricated pneumatic workbench has been calculated in this paper.
Parameter Optimization and Design of Radial Telescopic-Type Tire Building Drum
Authors: Sun Wei Da , Ni Yan Bing , Yang Yu Hu
Published: November 2010

The study concentrated on a radial telescopic-type tire building drum, analyzed the frameworks and working principle. Make motion analysis and dynamic analysis for the frameworks, research the relations of speed, acceleration between them, and analysis the mechanical efficiency of them. Determine the main parameters that affect the motion and force transmission characteristics of the mechanism. On this basis, we optimize the parameters and make of general guidelines for preferences and design. Using the software SolidWorks to make three-dimensional entity modeling, assembling and motion simulation. By the check analysis of the software, improve and optimize the design.
Parameter Optimization of Laser Scribing Technics of 30Q130 Grain-Oriented Silicon Steel Based on Genetic Neural Network
Authors: Huang Yu , Liu Yong , Zhu Guo Li
Published: November 2010

A laser is often considered to scribe the grain-oriented silicon steel surfaces after cold-rolling and annealing to reduce the core loss. It is necessary to select the best scribing parameters to maximize the reduction in this process. This paper proposed an optimization method of genetic algorithm during laser scribing of 30Q130 steel, by developing an artificial neural network prediction model using a database form a designed orthogonal experiment. The objective was to determine the best combination values of three important scribing parameters, namely scribing velocity, pulse energy and scanning spacing, that can get the largest core loss reduction. An optimized combination of parameters was obtained by this method and then validated by an adding experiment. The result indicates that the optimization model is reliable.
Performance Simulation and Design of New Series Hydraulic Hybrid Bus
Authors: Xi Ping Yuan , Chang Si Qin
Published: November 2010

Due to large mass and frequent start-stop, the advanced hybrid propulsion technologies enabling regenerating and reusing of significant amounts of braking energy are critical to achieving future fuel economy goals for city buses. The initial breakaway friction and inertia of the hydraulic hybrid bus can be overcome by energy that would ordinarily already have been wasted, and when running the engine, can operate in more efficient modes. Therefore energy-saving and environmental protection of hydraulic hybrid buses has important significance in application. The simulation model of series hydraulic hybrid bus is created in AMESim. The simulation results of the SHHB model show that it is very prominent in saving energy and reducing harmful emissions.
Prediction for Shoe Factor of Drum Brakes Based on Nonlinear 3D Simulation Models
Authors: Ning Xiao Bin , Shen Ji Sheng , Meng Bin
Published: November 2010

In order to accurately calculate the braking efficiency factor of drum brake shoe of heavy truck, virtual prototyping of a heavy truck's brake is demonstrated. The requirements for brakes include not only its performance but also its comfort, serviceability and working lifetime, which must be high. The finite element analysis software ANSYS and the multi-body system simulation software MSC.ADAMS were used to establish the drum brake nonlinear 3D simulation model. The model was built by developing joint program module between the rigid shoe and the flexible lining and nonlinear contact force program module between the lining and the rigid drum. Using this model, the simulation was executed for the drum brake of 32t heavy duty truck. The results show that the simulated braking efficiency factor coincides with experimental results of the braking efficiency factor of the heavy truck drum brake.
Printed Circuit Board Assemble Process Decision-Making System Based on Knowledge
Authors: Kong Xian Guang , Wang Yong Xiang , Ma Bin Qiang
Published: November 2010

Now, the prophase preparation work of PCA process planning takes longer time, and it is prone to errors and lacks of through consideration and optimization. In addition, PCA process planning does not retain abundant knowledge and experience by good technological tool and means. This situation has no longer been suitable for the current development speed of PCA product. The purpose of this paper is to satisfy with efficient PCA process planning by using expert system technology with PCA process characteristic. A PCA process design-making expert system based on knowledge is designed and developed. This paper also shows system work-flow, knowledge management and process decision-making flow in detail.
Pump-Control-Motor Combined Speed Governing Control Platform Based on Virtual Instrument
Authors: Peng Tian Hao , Liu Jia Dong , Hao Xiao Song , Yang Mei Sheng
Published: November 2010

An integrated hydraulic speed control platform including fuzzy self-tuning PID controller is developed using LabVIEW. The pump-control-motor variable speed throttle combined speed governing experimental system is tested under the different speed governing control model. Experimental results show that, the complex speed control can be regulated to maintain a desired response and the fuzzy control technology enables better control characteristics.
Relationships between Tensile Mechanical Properties and Roughness of Tensile Fracture About 16MnR Steel after High Temperature
Authors: Zhang Su , Liu An Zhong , Cui Jian Hua
Published: November 2010

The microstructure of metal material would vary with temperature, the roughness of the metal fracture would change. The mechanical properties of materials closely related to roughness of fracture. In this paper, after high temperature the tensile fracture roughness and tensile mechanical properties were analyzed for 16MnR steel. Further, relationships between roughness of tensile fracture and temperature, relationships between roughness of tensile fracture and grain size of material were also discussed.
Research of Automatic Positioning Technology for Dental Crowns Design
Authors: Duan Yi Hao , Cheng Xiao Sheng , Dai Ning , Yuan Tian Ran
Published: November 2010

A novel method to automatically position the standard dental crown for the design of dental crowns is proposed. We use margin feature points to fit a plane, and the path of insertion is just a line perpendicular to the fitting plane, as well as through the centroid of the margin feature points. Besides, we can get the information of the matching points, one on the standard crown model and the other on the neighboring tooth model. According to these, the positioning datum is constructed. Finally through a series of three-dimensional transformation, automatic positioning of the standard dental crown can be implemented rapidly.
Research of Parasite Design Model in Industrial Design
Authors: Zi Peng
Published: November 2010

Through speculation of parasitic relationships among organisms, the paper proposes a parasite design model, which further enriches design methodology of industrial design. The paper clarifies design classification of “specific parasite design” and “compatible parasite design”, “parasite design of single host” and “parasite design of multiple hosts”, summarizes specific design methods of parasite design model, including substances sharing method, function borrowing method, energy drawing method, information sharing method and parasitic alternative method. The paper emphasizes that connection issue is the key of parasite design; good connection is the guarantee of functional implementation in parasitic products and effective communication of energy and information. Simultaneously, the paper explains that parasite design possesses the capabilities of meeting the requests of low-carbon design, reducing the use of materials, improving energy efficiency, expanding the functions of the original things, enhancing the information efficiency, expanding and saving available space etc.
Research on Building Method of Knowledge Resource Cooperation Complex Network for Regional Manufacturing
Authors: Zhan Hong Fei
Published: November 2010

Complex network is becoming one of the effective research method for knowledge management. However, the building method for the complex network is the first problem that must be addressed. The e-EPC process case modeling method was adopted in the paper to solve the problem. The building method mentioned in the paper can provide a simple way to construct a knowledge resource complex network which can be used to analyze the innovation ability of an organization, or help to distribute knowledge resources to a business process. The scale-free parameters analysis based on the network, such as average path length, cluster coefficient, provides a helpful digital reference for knowledge management and decision.
Study of Nonlinear Phenomena and Chaos Control in Single-Phase SPWM H Bridge Inverter
Authors: Jiang Wei , Yuan Fang , Hu Wen Long
Published: November 2010

This paper introduces the work principle of single-phase SPWM H bridge inverter and builds up the mathematics model according to KVL and KCL. It can easy to observe nonlinear phenomena in the circuit after simulation the model. According to the characteristics of single-phase SPWM H bridge inverter, both resonant parametric perturbation and TDFC are good ways to eliminate chaotic behavior of inverter and made the system changing from chaos to stable period. It has a very important practical value and theoretical significance for stability design of single-phase SPWM H bridge inverter.
Research on Bridge Health and Safety Monitoring System
Authors: Fan Xiao Chun
Published: November 2010

Research on Bridge health and safety monitoring system is a hot topic. The safety monitoring systems have been applied in some long span bridges. Based on investigation, several problems in health and safety monitoring systems of existing bridges and the developing trends were introduced. This paper summarized the present research on bridge monitoring system worldwide. We hope it could be helpful to the application of bridge health and safety monitoring system.
On Semi-Supervised Learning Genetic-Based and Deterministic Annealing EM Algorithm for Dirichlet Mixture Models
Authors: Bai Jing Hua , Li Kan , Zhang Xiao Xian
Published: November 2010

We propose a genetic-based and deterministic annealing expectation-maximization (GA&DA-EM) algorithm for learning Dirichlet mixture models from multivariate data. This algorithm is capable of selecting the number of components of the model using the minimum description length (MDL) criterion. Our approach benefits from the properties of Genetic algorithms and deterministic annealing algorithm by combination of both into a single procedure. The population-based stochastic search of the GA&DA explores the search space more thoroughly than the EM method. Therefore, our algorithm enables escaping from local optimal solutions since the algorithm becomes less sensitive to its initialization. The GA&DA-EM algorithm is elitist which maintains the monotonic convergence property of the EM algorithm. We conducted experiments on the WebKB and 20NEWSGROUPS. The results show that show that 1) the GA&DA-EM outperforms the EM method since: Our approach identifies the number of components which were used to generate the underlying data more often than the EM algorithm. 2) the algorithm alternatives to EM that overcoming the challenges of local maxima.
Web-Based Case Report Form Design for Clinical Trial
Authors: Fu Ling Li , Chen Tao
Published: November 2010

With more clinical trials using electronic way, new drugs electronic application has becoming an inevitable trend in near future. A well-designed case report form (CRF) is the premise of high quality clinical trials which facilitates data collection and entry, and directly benefits other facets of clinical data management. Firstly, paper introduces the CRF design modes and design principles. Then paper describes the CRF design process, and based on this, paper constructs the data structure with CDISC ODM concept. Lastly, paper explores how to convert the paper CRF to electronic format in web application with SAS statistic requirements in detail.
Built-in Self-Test Design for Fault Detection of MUXFXs in SRAM-Based FPGAs
Authors: Hong Sheng , Tao Wen Hui , Qi Yun Ping , Gao Cheng , Liu Xiao Zhang , Huang Jiao Ying , Zhang Dong
Published: November 2010

This paper proposes a built-in self-test (BIST) design for MUXFXs in SRAM-based FPGAs. This approach can test both the interconnect resources and MUXFXs in the configurable logic blocks (CLBs). Because the test pattern generator (TPG) and output response analyzer (ORA)are configured by existing CLBs in FPGAs, no extra area overhead is needed for the proposed BIST structure. Open/short , stuck on/off faults in PSs, and stuck-at-0/1 faults in MUXFXs will be detected through the target fault detection/diagnosis of the proposed BIST structure.
The Formation Mechanism Analysis of Information Content Industry Cluster
Authors: Han Jie Ping , Wei Ya Qiong
Published: November 2010

This paper, firstly, introduces the related concepts such as information content industry (IC) and information content industry clusters (ICC), etc, and then, studies the ICC formation mechanism based on analyzing the reason of information content industry agglomeration (ICA).
Voltage Scaling for SRAM in 45nm CMOS Process
Authors: Hu Jian Ping , Zhu Jia Guo
Published: November 2010

Scaling supply voltage is an efficient approach to achieve low energy. Scaling supply voltage to sub-threshold region can reach minimum energy consumption but only suits for ultra-low operation frequencies. In order to attain more extensive application, scaling supply voltage to medium-voltage region is an attractive approach especially suiting for mid performances. This paper investigates performances of conventional SRAMs in near-threshold and super-threshold regions in terms of energy dissipation and max operating frequency. All circuits are simulated with HSPICE at PTM 45nm CMOS technology by varying supply voltages from 0.4V to 1.1V with 0.1V steps. The simulation results demonstrate that the conventional SRAMs operate on medium-voltage region can not only keep reasonable speed but also reduce greatly energy consumptions.
Design of Multimedia Courseware Sports Theory Based on Visual Basic
Authors: Yin Zhong Bin , Ren Yue , Yan Gui Fang
Published: November 2010

With the development of modern educational technology, multimedia courseware has become the new trend of educational technology. Multimedia courseware, in educational practice, has been the key to promoting multimedia-aided teaching. By means of using VB to write the physical theory, multimedia courseware can undoubtedly enrich and improve teaching quality. This paper, based on the VB language development environment, focuses on how to design physical multimedia courseware and discusses some key techniques in the process of courseware implementation.