bluuebunny/crossref_metadata_2025 huggingface dataset:
Inactivation of Escherichia Coli on Titanium Dioxide Photocatalysis Nanoparticles
Authors: Wang Jing , Ji Zhi Jiang , Shui Zhong He , Wang Xiao Yan , Ding Nan , Li Hai Jian
Published: January 2010

The effects of P25 TiO2 made by DEGUSSA and one kind nano-titanium dioxide made by a certain company in China (Expressed by Tc) on Escherichia coli were tested by the minimal inhibitory concentration (MIC) method, and the status dispersed of two kinds nano-TiO2 and the micro-phenomenon of the effect on Escherichia coli were observed by scanning electron microscope (SEM). The hydroxyl radical (•OH) signal intensity in liquid produced by nano-TiO2 was tested by electron spinning resonance (ESR). It was found that the MIC of the P25 and Tc were 500 mg/L and 5 g/L, respectively. The cells of E. coli which were attached by the nano-TiO2 particles were damaged strongly, and the membrane was dissolved and dispersed under SEM. The intensity of •OH signal produced by P25 was stronger than that of Tc tested by ESR. The size of E. coli was 0.4~0.7×1~3 µm, and the average diameter of nano-TiO2 was 20 nm. When the nano-TiO2 particles touch the E. coli, it would stick to the surface of the cell wall and destroy the cell membrane, lead to the canker of cell membrane and the outflow of cytoplasm. The difference of the MIC between the two kinds of nano-powders may be due to their dispersion degree and the particle diameter which influence the •OH production.
Composite Design and Technology
Authors: Marks Lena , Ziegmann Gerhard
Published: January 2010

In recent years fibre reinforced plastics play a constantly improving role in a growing field of applications. From the chemical industry through sports equipments up to aircraft production - composites can be used in all these industrial areas. Although materials like glass fibre reinforced or carbon fibre reinforced plastics have a lot of applications in structural parts the knowledge about dimensioning and processing techniques is not exploited for the design of composite structures. If the parts and structures are not built for high performance applications such as in aircrafts, often principles and theories based on metal design are used to design the parts. In this article the basics of structural mechanics for composite materials are presented. An overview about how to work with anisotropic material in design as well as in processing is given and the most important CAE tools for composite design are shortly presented.
Magnesium and Aluminium Carbon Nanotube Composites
Authors: Goh C.S. , Gupta Manoj , Jarfors Anders W.E. , Tan Ming Jen , Wei J.
Published: January 2010

Carbon nanotubes are one of the most exciting discoveries of nanosized materials in the 20th century. Challenges to create materials applicable for industrial applications involve both the incorporation of the carbon nanotubes into the material and to ensure that they do not agglomerate. Aluminium and magnesium based materials are among the metals that can benefit from the incorporation of carbon nanotubes. The fabrication of Aluminium carbon nanotube composites has challenges from reactivity and degradation of the carbon nanotube additions; hence the powder metallurgy route is preferred. Magnesium based materials on the other hand do not have this limitation and both the powder metallurgical route and the casting route are viable. Among the benefits of adding carbon nanotubes are increased yield strength and stiffness. Here is important that the effect is significant already at very low addition levels. This makes it possible to increase strength without having a significant detrimental effect on ductility. In fact, for magnesium alloys ductility can be improved due to the activation of additional slip planes improving the normally low ductility of HCP structure materials.
Press Joining Rolling Process for Hybrid Systems
Authors: Carradò Adele , Sokolova Olga , Ziegmann Gerhard , Palkowski Heinz
Published: January 2010

The press joining rolling process used for the production of metal/polymer/metal systems is introduced. In the first step three-layer sandwich sheet, 316L/polypropylene- polyethylene/316L (316L/PP-PE/316L) with and without local reinforcement, were processed by roll bonding at approx. 250°C of two steel sheets with a pre-rolled PP-PE - core sheet. Mechanical and forming behaviour of the parts had been investigated by tensile, bending and deep drawing tests. It could be shown that for moderate drawing depths deep drawing behaviour is close to the one of the mono-material.
Design, Development and Testing of Rubber Nanocomposites
Authors: Saritha A. , Kuruvilla Joseph , Sabu Thomas
Published: January 2010

This review aims at reporting on very recent developments in the synthesis, properties and (future) applications of rubber nanocomposites. Nanocomposites are the materials for the future, which have improved mechanical properties. Reinforcement is especially important for the application of elastomeric materials because the mechanical strength of unfilled elastomers is generally poor. Commonly isometric fillers like carbon black or fumed silica are used for reinforcing elastomers.Rubber nanocomposites play an important role in engineering, construction and aerospace applications. This new family of materials exhibit enhanced properties at very low filler level, usually ≤ 5 wt %. Rubber nanocomposites exhibit very good Young’s modulus , storage modulus, thermal stability , gas barrier properties and flame retardancy.
Thermo-Mechanical Monitoring of Composite Materials during the Pyrolysis of C/C Composites
Authors: Wielage Bernhard , Weber Daisy , Müller Tobias , Steger Heike
Published: January 2010

Conventional mechanical and structural properties allow to describe the complete composite material. They do, however, not describe the reaction during the pyrolysis process. The dynamic mechanical thermal analysis (DMTA) is a technique which is used to characterize materials. In particular, the DMTA method is used to observe the viscoelastic nature of polymers. Another interesting application area of the DMTA is the simulation of pyrolysis experiments to obtain carbon/carbon composites (C/C composites). The pyrolysis process of carbon-fibre-reinforced plastics (CFRP) was performed by means of inert gas (Ar, ambient pressure) under a defined time-temperature profile or alternatively approached by short time sweeps in a DMTA. So the temperature dependence of the elastic modulus (E-modulus) and of the internal damping (tan δ) are determined starting from the cured carbon-fibre-reinforced plastic to the transformed C/C composites. The analyses were applied for different matrix resins. The shown method improves the access to usually hidden mechanical and structural properties and requires further investigation of the entire polymerization and pyrolysis processes.
Study on the Quality Evaluating Methods of Laser Forming Based on Thermal Stress
Authors: Zhou Yi Jun , Zhang Yong Kang , You W.M. , Huang Y.G.
Published: January 2010

People are in dire need of knowing whether the workpiece is satisfactory after laser forming while using the technology of laser forming with thermal stress. In order to solve the difficult problem of how to evaluate the quality of laser forming with thermal stress, surface quality evaluating indexes have been studied firstly; surface defects, surface roughness and surface association mechanical property (such as surface hardness, surface constitution, surface residual stress) are considered as primary measuring indexes of laser forming quality; the internal quality of laser forming is rested with the quality of forming area. Surface defects and their methods of calibration, surface roughness and its method of measurement, surface association mechanical property and its methods of measurement are introduced respectively. In the meantime, how to establish the quality evaluating system of laser induced thermal stress forming work pieces has been discussed, the work should be carried out after conforming to evaluation system, evaluation indexes and evaluation criterion.
Vacuum Micro-Electroforming Technique for the Production of Void-Free Microcomponent
Authors: Ming Ping Mei , Zhu Di , Zhou Fei , Hu Yang Yang
Published: January 2010

Pinhole defect in the deposit is one of the ticklers which have not yet been solved fundamentally when micro-electroforming nickel into high-aspect-ratio (HAR) micro-molds. To obtain void-free micro-components, a new micro-electroforming technique, which was carried out under the complex circumstance of vacuum-degassing and temperature-gradient, was developed in this paper. Mechanisms of this micro-electroforming process were introduced using graphic and simulation methods. To investigate the feasibility of the exploited technique, a series of experiments were performed using special equipment developed by authors, followed by the evaluating of surface morphology of nickel micro-electroforms using a scanning electron microscope (SEM). Experimental results showed that, comparing with the conventional electroforming practices, a significant reduction in pinhole defects of the samples electroformed by the novel process was achieved.
Cathode and its Feeding Path Design in the NC-ECM Process of the Rimed Integral Impeller
Authors: Zhao Jian She , Xu Jia Wen , Yun N.Z.
Published: January 2010

At present, the rimed integral impeller is machined mainly by NC-electro-discharge machining (NC-EDM). To raise the efficiency of EDM process, the pre-channel is machined by NC-ECM to replace NC-EDM in rough machining process. The experimental results indicate that the whole process efficiency can be improved by not less than 20%, but the design of cathode and its feeding path in NC-ECM is a skilled and costly work. To improve machining accuracy and simplify design process, a new design approach based on simulating the shaping process of NC-ECM was put forward to design the cathode and its feeding path.
Outer Space Target Recognition Based on Image Sequence
Authors: Song W.G. , Zhou P.H. , Lu Guo Liang , Li X.Y.
Published: January 2010

Outer space target recognition is one of kernel functions of space-based surveillance system. This paper presents a new method on space target recognition based on image sequence using wavelet moments and DS evidence theory. Experimental results show our recognition system has a good performance (100%) which achieves need of practical application.
Study on Milling Process Simulation for Monolithic Components Web
Authors: Guo Hun , Zuo Dun Wen , Tang Guo Xing
Published: January 2010

It is very difficult to predict the CNC milling process of monolithic components in aero-industry by either theoretical analysis or experimental research，because of their complicated structure. The machining distortion becomes one of the neck problems in the rapid development and the efficient production of our national defense weapons. The milling process of monolithic components web is simulated by 3D FEM， and the residual stress distribution and the variation tendency of the milling distortion are obtained， comparing the simulation results and the real measurement in the distortion，the proposed model is proved to be effective.
A New Tracking Control Algorithm for Mobile Robots
Authors: Zhao Yi Hong , Chen Rong Fa
Published: January 2010

This paper presents a new trajectory tracking control algorithm to uncertain mobile robot with nonholonomic constraints. This algorithm is based on the non-singular terminal sliding mode technique, which can eliminate the singularity problem caused by conventional terminal sliding mode control. The proposed control laws enable the mobile robots track the desired trajectory in finite time when the desired rotate velocities are nonzero. Simulation results show the effectiveness of the algorithm.
Simulation on the Melting Rate of the Iced Fixed-Abrasive Polishing Plate
Authors: Kang Jing , Zuo Dun Wen , Sun Yu Li , Lu Wen Zhuang , Zhao Yu Fei
Published: January 2010

The exchange of the heat of the IFA polishing system was analyzed at first in this paper. Then the three-dimensional temperature finite element model was set up. By changing the material of the elements, the ice-melting process was simulated. It was found that the obtained simulating results showed a good agreement with the experimental results. The temperature distribution and the melting rate were studied in the case of different technical parameters, which can be used to provide references for choosing better parameters.
Machining Mechanism of Abrasive Water Jet on Ceramics
Authors: Zhang Feng Lian
Published: January 2010

Engineering ceramics feature resistance to high temperature, corrosion, wear and hot impact. However, it is difficult to machine this material in conventional machining methods because of its high hardness and brittleness as well as inconductivity, thus restricting its application area. In recent years, more and more importance has been attached to the new machining method of engineering ceramics, i.e. abrasive water-jet. Feature high efficiency and low cost, the method can be used to process the products of complex shape. However, abrasive water-jet machining of advanced ceramics is a very complex process. The effect of machining on brittle materials, and advanced ceramic materials in particular, have not yet been very well understood. The present research investigates the effect of abrasive water-jet machining on ceramics. The study will increase the general understanding of the machining phenomena for more successful application of abrasive water-jet machining on brittle materials.
Research and Implement of Automated Eliminating Bubbles Method Oriented to Vacuum Casting
Authors: Zhang Hai Guang , Hu Qing Xi , Liu Yuan Yuan , Wang J.W. , Chi Z.F. , Huang H.J.
Published: January 2010

This paper proposed a new method of automated eliminating bubbles based on vision sense technology because detection and elimination of bubbles of injection materials is key factor which influences the quality of products and hinders realization of full automatic control for the vacuum casting. This method uses vision sensor to replace artificial visual measurement, and adopts processing of the bubbles images to judge the effect of eliminating bubbles instead of experiences of operators. This paper developed a bubbles monitoring control system to realize the automated eliminating bubbles method. The system adopts two-level distributed structure which is consisted of host and slave computers. The slave computer is composed of image acquisition module, controller module and execution module. It is responsible for controlling operation devices to finish vacuum casting. The host computer is responsible for supervisory control which includes human-machine interface module, camera control module and images analysis and processing module. The function of every module is described in detail. The operator is just needed to set relative parameters, and then the system will implement automatically. In a word, the controlling system based on this new method possesses some advantages such as high precision, efficiency and flexibility.
The Deep Etching Process Based on Parallel Laser Direct Writing System
Authors: Hu Jin , Pu D.L. , Chen Lin Sen
Published: January 2010

Due to the high cost-effectiveness, extra flexibility, and short production cycle, laser direct writing system as a kind of maskless lithography technology has been widely used in the fields of micro-nano-manufacturing. The working principle of the parallel laser direct writing system based on DMD(Digital Micromirror Device) is introduced. A novel negative photoresist -- dry film photoresist is adopted into the study of deep etching for the fabrication of the micro mold. The experimental results show that: the whole process is convenient, efficient and flexible; the precision of the 2-D patterning and the depth of etching is reliable.
Research on Concurrent Design and GM-Oriented System for Typical Mechanical Products
Authors: Su C. , Zhang Z.R.
Published: January 2010

An implementation methodology is proposed to serve a system for the network-based design and GM (Green Manufacturing), and the detailed design process of the system is introduced, which would be universally applicable for mechanical product design for green manufacturing. To realize the remote product data management, the dreamweaver software and FTP functions are used, and some new programs are developed to building the parts library based on UG NX development platform. However, the client database management has been realized by using IIS and ODBC functions. Eventually a prototype system is developed to accomplish concurrent design for green manufacturing.
Plastic Behavior of Laser Cladding Sample under Repeated-Impact Load
Authors: Shi Shi Hong , Fu Ge Yan
Published: January 2010

Low stress repeated impact experiments and test were carried out on medium carbon steel and stainless steel samples which is clad with high-strength Co-based or Ni-based alloy. The results showed that under low stress repeated impact load, which is much lower than the yield strength of material, plastic deformation will be occurred on the coating and part of its below base material. The average plastic deformation degree caused by each impact is increased at first, and then declined with the increase of impact times. Accumulated impact will lead to macroscopic plastic deformation and material hardening. The degree of deformation and the size of deformation area are related to the impact stress value and the material’s strength. The degree of deformation and hardening decline from the exterior to the interior, and only occur on the impact surface and a certain depth below, forming a ‘deformable area’. Based on our analysis, we consider that low stress repeated impact deformation is a kind of accumulative fatigue damage. The energy absorbed by material under repeated impact load, is larger than that absorbed at the same peak value of stress under static load or static fatigue load. Moreover, the energy absorbability is inversely proportional to the impact distance. Repeated impact may increase the movability of atom, reduce the critical shearing stress, that make the dislocation be initiated and increased easily.
Research on the Disassembly Design of the Used Cars
Authors: Liu Y.
Published: January 2010

Automotive components in the analysis of end-of-life recycling programs, based on the study of automobile recycling techniques and strategies; the establishment of the Waste Recycling automotive components model, a vehicle designed for Recycling and Design for Disassembly The criteria for the design. At the same time, the disassembly of the establishment of a design-oriented model of car design to explore the design for the disassembly of the key recovery technology, pointed out that the recycling-oriented design and design for disassembly is to save resources, reduce costs and realize the design of automotive products and green automotive industry to create an effective model of sustainable development one of the means.
Strength Analysis of 2000L-B Vertical Mixer’s Blades with FEM
Authors: Liu Bai , Liu X.J. , Zhao Zhen Yu , Liao Long
Published: January 2010

The torsion load of 2000L-B vertical mixer’s blade was firstly calculated by the relation
between torsion input and output of planetary gear train. Then by means of finite element software
ANSYS, analyses on stress and displacement of solid blade and hollow blade in mixer were carried
out. As result, the stress and displacement contour maps were obtained and the maximum stress and
deformation values were found. The strength checking of blade indicated that the blade had enough
stability and strength margin.
A Goal-Oriented Active Service Model and its COE Algorithm for Migrating Workflow System
Authors: Wang Rui
Published: January 2010

Workflow management systems (WFMS) are complex distributed systems, which are geared for the orchestration of business processes across multiple organizations. In order to adapt to the heterogeneous, distributed and dynamic environment, we propose a goal-oriented active service model. The model is designed to support organizational coevolution for providing workflow services. This paper reviews the introduction and motivation for active service approach, discusses the technologies used in active service, which represents steps towards the end goal of building virtual service group and organizational coevolutionary(COE) algorithm.
Intelligent Choice of Characteristic Parameters of Oilstone in Honing of Titanium Alloy Cylinder Based on Artificial Neural Network
Authors: Wen Yi Fang , Rui Yan Nian , Cao Jian Dong
Published: January 2010

Titanium alloys have good mechanical properties and organizational stability. However, due to the larger viscousity of titanium, a reasonable choice of the characteristic parameters of oilstone will directly affect the quality and efficiency of honing processing. This article solved multi-objective problem using artificial neural network with fast convergence and high precision. Based on a comprehensive analysis of the relationship between the workpiece material, materials status, surface hardness, the required surface quality and various parameters of oilstone, the improved artificial neural network algorithm-GCAQBP was adopted, through coding optimization of input and output parameters, model of intelligent choice of oilstone’s parameters was constructed about titanium alloy cylinder honing processing. Through experimental studies, it is shown that the intelligent model can choose quickly with high reliability compared with the traditional experience.
A Study on Ontology-Based Representation System of Product Design Knowledge
Authors: Wu H.B. , Liu Yuan Wei
Published: January 2010

In this paper, we investigated the definition of product design knowledge, design knowledge origin characteristics and design knowledge formalized representation method, etc. We also established the methods to classify and represent the concept-design knowledge and developed an ontology-based model presenting the design knowledge as well as a model for modeling cycles. From the design knowledge management’s angle, design knowledge modeling approach is studied to support the design knowledge development, transfer and reuse for the construction machinery the knowledge modeling.
Computer Simulation on the Motion Tracks of Ice Fixed Abrasives Polishing
Authors: Sun Yu Li , Zuo Dun Wen , Li Jun , Lu Wen Zhuang , Yu Z.Z.
Published: January 2010

Ice fixed abrasives (IFA) polishing is a novel ultra-precision machining method. The motion tracks of abrasives during IFA polishing have an important effect on the quality of the machined silicon wafer. Firstly, the motion tracks of IFA polishing are theoretically analyzed in this paper. It is founded that the paths of any point in the IFA polishing pad relative to the wokpiece are a group of cycloids. Then, the motion tracks of single abrasive and multiple abrasives in the IFA polishing pad are simulated respectively. The results show that increasing the eccentricity is beneficial to the enlargement of the size range of polishing process. With the increasing of the speed ratio between the IFA polishing pad and the workpiece, the abrasive at higher speed can leave longer tracks on the workpiece than that at lower speed at the same time. The more the abrasives, the more uniform the mark density under the influence of more abrasives.
Bose-Einstein Condensation and its Achieving Technique
Authors: Wang Z.G.
Published: January 2010

Since Einstein predicted the phenomenon of Bose-Einstein Condensation in 1924, more physical scientists have tried to realize it, but they didn’t break through until 1995. In this paper, the characteristics and conditions of BEC are introduced first, and then the exploration course is presented. Based on these studied, the realizing techniques of BEC is proposed, including Laser Refrigeration Technique, Ion Trapping of Magnetic Capture, Evaporative Cooling Technology and Measurement Technology of BEC, etc.
Analysis of the Management of Hospitality Customers Complaint and its Countermeasures
Authors: Li Y.L. , Wei M.
Published: January 2010

Customers are the source of hotel profits, and hotel profits provide the customers with a wide range of services to achieve through the hotel. Because of the existence of intangible, heterogeneity, identity of production and consumption in services, as well as the subjective characteristics in the evaluation of service quality, etc, the phenomenon of customers’ complaints will inevitably be encountered. If they are not handled properly, it will inevitably cause the loss of the hotel. So it is a great importance to handle correctly customer complaints. By analyzing the substance of customer complaints and the causing reason, this paper proposes countermeasures to deal with customer complaints to turn negative factors into positive ones, and enhance customer satisfaction and loyalty, and safeguard the reputation of the hotel to improve hotel service quality.
Study the Cooperative Education Model under the Value Sight
Authors: Xiong X.M.
Published: January 2010

This paper utilizes the basic theory of education model research to carry on the discussion about the theory beginning, thought premise and value orientation of cooperative education model, then puts forward its concept, type and characteristic. Cooperative education model is a raise form which was supported by both school and enterprises (or research) to cultivate students' synthesizing capacity and the employment competitive power as a key point, using two kinds of different education environment and the educational resources of the university and the enterprise to unify the theoretical teaching, the practice education and the undertaking education together, to raise talents with the characteristics of high quality and application ability to meet the requirements of the modern society or the modern enterprises. Some one thinks that, if it though processing and refinement, the cooperative education model will become an effective theory that has its real and abundant intension and it is a kind of procedure knowledge that is suitable for study and quote.
A Simultaneous Smooth Processes Using Burnishing and Elecrofinishing on the Plane Surface
Authors: Pa Pai Shan
Published: January 2010

For the purpose of elevating the efficiency of the finish effect to reach the fast improvement of the surface roughness of the plane surface, so as to reduce the residual stress on the surface efficiently. This study discusses the plane surface after traditional grinding machining, of which the plane surface used a new design of finish-tool includes a nonconductive burnishing-tool and a negative electrode to execute the simultaneous processes of burnishing and electrofinishing. In the experiment, the use of the small thickness of the negative electrode is advantageous to the finish effect. High rotational speed of the finish-tool produces better polishing. Higher current rating with quicker workpiece feed rate effectively reaches the fast improvement of the surface roughness of the workpiece. The finishing effect is better with longer off-time because discharge of the electrofinishing dregs becomes easier. The experimental results show that the supply of current rating is near concern with the position of the negative electrode and the burnishing-tool.
Green Clamping Devices Based on Two-Step Orthogonal Toggle Force Amplifier Driven by Pneumatic Muscle
Authors: Si Guang Ju , Wang Ming Di , Zhong Kang Min
Published: January 2010

As a new kind of flexible pneumatic actuator using clean compressed air as working medium, pneumatic muscle has many particular characteristics comparing with pneumatic cylinder. It can well accord with the development of green transmission technique. Combing pneumatic muscle with mechanical force amplifier is a practical and creative design method. According to this method, two kinds of green pneumatic clamping devices based on two-step orthogonal toggle force amplifier driven by pneumatic muscle are introduced. Their working principles and characteristic features are analyzed and corresponding mechanics calculating formulae are also given respectively.
Speed Control System Design of Winding Mechanism for Composite Films
Authors: Du Yu Hong , Jiang Xiu Ming , Yang Gong Yuan
Published: January 2010

To avoid the instability of the tension control in the continuous transmission process, a constant speed control system is designed and used in winding mechanism for composite films. Combining the mathematical model and the ratio speed control method, a system control algorithm is proposed. Results show that the system has the excellent robustness and the rapid speed response which meet the requirements of high speed constant tension control in the packaging industry. In order to improve the dynamic performance including fast response and non-overshoot, gain control and variable integration time constant control is used. Further, feed forward control method and adaptive control method is utilized to stabilize the composite films tension.
Research on the Thermal Property of Machine Tool Slides Based on Cellular Structures
Authors: He Yong , Fu Jian Zhong , Chen Zi Chen
Published: January 2010

To decrease the thermal error in the machining of high speed machine tools, a new design idea based on the cellular metal structures was proposed. With forced convection in cellular metals, the heat generated in machining will be dissipated and the machining precision can be guaranteed. The thermal property of machine slides using 2D rectangle cellular structures was studied with theoretical analyses and numerical simulation. The theoretical predictions are in good agreement with the finite element simulation results. The overall heat transfer coefficient and the thermal performance were acquired with the volume-averaging method and the relationships between the cellular porosity, cellular sizes and the thermal performance were discussed. The analyzed results show that the maximum thermal performance can be got when the cellular porosity equals about 0.85 and with the increase of cellular sizes, the thermal performance decreases.
Study on Improved Neural Network PID Control for Coal Mining Power Grid Arc Suppression Coil Compensating System
Authors: Ma C.Y. , Wang C.L. , Liu J.H. , Li X.B. , Liang R.
Published: January 2010

The paper analyzed arc suppression coil with magnetic bias compensating system with linear system rules. The nonlinear and time-variable performances are considered during model building process. In order to optimize control effect, the paper adopted improved BP neural network PID controller with closed loop control method. Improve BP neural network with the combination of the two strategies, adding momentum method and adaptive learning rate adjustment, can not only effectively suppress the network appearing local minimum but also good to shorten learning time and improve stability of the network furthermore. The results of simulation and experiments indicate that arc suppression coil based on improved neural network with PID control method can quickly and accurately control the compensating capacitive current to an expected value and it has strong robustness. The paper also provided core controller with software and hardware designing scheme based on STM32 microcontroller.
Selecting the Parameters for Brazing 08 Steel with Pure Copper Solder Paste
Authors: Chang De Gong , Zhang J. , Lv M.L.
Published: January 2010

The larger variation of the construction and performance of the low-carbon steel joints was caused by the high temperature of the puddle welding of the joint. Therefore, the braze welding rather than the puddle welding was applied to the welding production of low-carbon steel. The 08 steel parts were joined in a furnace using pure copper solder paste as brazing filler metal. According to the obtained results, the ideal technical parameters are as follow: brazing temperature: 1100-1150°C; holding time: 5-10min; joint clearance: 0.03-0.05mm.
Topology Optimization of One Special Carriage’s Square Cabin
Authors: Song M.L. , Wang Y.P. , Yang Jun Kui
Published: January 2010

Using OptiStruct as the tool of optimization, the topology optimization of one special carriage’s square cabin is studied. The methodology of structural topology optimization is present and the key technology is discussed. the weight of the top-placed facility pedestal is set as the optimization objective,and its optimization model is developed. The establishment method of the optimization objective function, design variables and constraint condition are introduced. Through optimization calculation, the result of topology optimization is analyzed. The conclusion provides a significant researching basis for lightening the weight of cab.
Modal Analysis of Wire Suspension
Authors: Wu Lan Ying , Deng Jing
Published: January 2010

Wire Suspension is widely used in sensors, especially support the DVD actuator in each of side. The mechanics model of it can be regarded as cantilever beam. The dynamic model of the gear is established by FEM（Finite element method）and modal analyses of the wire suspension are investigated by ANSYS software.
Malfunction Analysis of the NC Machine Tool and its Vibration Model
Authors: Luo Y.S. , Fu Xiao Guang , Wang Xiao Jun
Published: January 2010

The means of classification of the NC machine tool malfunctions is the key basis on detecting malfunctions and processing malfunctions` s signal. By defining malfunction mechanism and malfunction mode, a series of new classifications are presented. According to malfunction mechanism, mechanical malfunction are damage malfunction, lubrication malfunction, and fit malfunction. According to malfunction mode, the noise malfunction can be classified as vibration malfunction mode, the heating malfunction can be classified as heating malfunction mode, and the bad motion malfunction can be classified as deformation malfunction mode. Conclusion is that damage malfunction of gear and bearing malfunction is the most frequent malfunction whose performance formation is noise. Another conclusion is that tooth surface fatigue is the familiar malfunction, and bearing malfunction is mainly caused by surface peeling. Based on these conclusions, the vibration model of the mechanical failure is established, which lays a foundation for dealing with the follow-up signal.
Research on the Technique of Tool Wear Monitoring in Plunge Milling
Authors: Qin Xu Da , Ji X.L. , Yu X. , Hua S. , Liu Wei Cheng , Ni Wang Yang , Liu Yi Xiong
Published: January 2010

The technique of tool wear monitoring in plunge milling is studied. The mean of cutting force signals and the root mean square (RMS) of vibration signals are selected as characteristic quantities. The model between tool wear and the characteristic quantities is built using BP artificial neural network. The result of experiment shows that the module is fit for plunge milling wear’s testing under cutting condition, and it is helpful to monitoring plunge milling tool strong wear.
A Study on the Intergenerational Succession of Family-Owned Businesses
Authors: Chen J. , Li H.
Published: January 2010

The training of second generation of successor has been an important task for most family-owned businesses. With groping for many years, the family-owned businesses have searched out a particular model of succession. Transferring the leadership from fathers to sons is very common, with the incumbent and the successor also being initiatively. There results in double succession of property right and management right at the same time and concentration in succession time. In this paper the development process and the character of the succession for family-owned businesses have been analyzed and discussed, and this succession model is presented, which has the general character of family-owned businesses in China, with the particular character of Changzhou. The intergenerational succession is analyzed successfully by means of the model, and the result is validated by the family-owned businesses in Changzhou.
A Network Forensics System Bypassing Web Local Encryption Businesses
Authors: Li P. , Wang R.Z. , Zhang Y.Z. , Chen D.W.
Published: January 2010

Sniffer and MITM attack can do nothing to local encryption, which is a new technology, because the plaintext is merely encrypted in user’s browser. Therefore, this paper proposed a clever way to bypass local encryption to achieve the goal of network forensics, based on the idea of MITM attack. A middle device is added to the key point of the network in which the forensics is realized through hijacking and tampering with HTML pages. The system redirects the IP packet to another computer in LAN by hijacking the real IP of the server. That computer fakes the real web server, and then by inserting some code in HTML page, the unencrypted plaintext is got before the code of local encryption been executed. The results show that the object is not aware of the existence of the forensics system, but the system has logged all the information of a HTTP request, including the plaintext bypassed local encryption.
The Data Exchange of the IGES Cured Surface in Reverse Engineering
Authors: Xiao Sheng Bing , Xie Xue Dong , Che Xiang Qian
Published: January 2010

The realization of the data exchanges between the reverse engineering system and CAD / CAM system is by Graphics Interchange standards, of which the initial graphics exchanges specification IGES is one of the important ways that data exchanges in systems. At first, the paper introduces the structures of the five parts that composes the IGES file. Secondly, it also introduces the meaning of the parameters that the rational B-spline surface in IGES and gives the method to identify and extract IGES surface data in the reverse engineering system. At last, it uses the OpenGL graphics system to show the surface data. Then, the exchanges of the surface data between the systems can realize easily by the method.
A Study on Quality Management System Based on Customer Value
Authors: Li J.J.
Published: January 2010

The following thesis makes a thorough analysis on the relationship between customer value and quality management system by introducing the concept of customer value management into the field of quality management. The author puts forward the idea that customer value is the goal of quality management system, while quality management system is the guarantee for customer value. Customer value directs the way for the innovation of quality management system.
Tool Wear Pattern and Mechanics in High Speed Cutting Microwave Printed Circuit Board
Authors: Zhao Xin , Li Y.
Published: January 2010

The experimental research on the wear mechanics and the tool life of TiN coated cemented carbide cutting tool in high speed milling of the Rogers/ Duroid RT6010 aluminum base microwave printed circuit board is carried out in his paper. The SEM is used to observe the wear morphology of the rake and flank face of cutting tools. The wear mechanisms of TiN coated tool include abrasive wear, adhesive wear and diffusion wear. It is shown that the abrasive wear is the main reason of cutting the complex material. In this paper, the wear mechanisms are an analyzed in details. The research results are contributive to choose proper high-speed cutting tools and parameters.
The Design of Micromanipulator Based on Piezo Actuator
Authors: Liu T.J. , Liu Q.Y.
Published: January 2010

In this paper, we describe a mcromanipulate mechanism used the converse piezoelectric effects, The micro-step mechanism based on converse piezoelectric effects is designed. Alternative signals programming from the computer is driving the piezo actuator by means of a dynamic power. The micro step motion of the the micro-step mechanism is realized used the electrostrictive effect and alternative clamping the guide staff, the position of Micro-step Mechanism is precise controlled.Micro gripper that actuated by piezoelectric cantilever was developed for the need of micro parts assembly.
The Establishment of an Optimized Parameters Database Management System for MPCB Milling
Authors: Pang Cun Chen , Xu Feng , Zuo Dun Wen , Wu X.J.
Published: January 2010

Microwave printed circuit board (MPCB) is a typical difficult-to-machine material because the ceramic particle bonded with polytetrafluoroethylene (PTFE) has high strength and hardness in its insulation layer. Research on MPCB milling parameter optimization is carried out in this paper. The maximum material removal rate is selected as the objective function, considering the constraints of machine tool, cutting tool and processing requirements. An optimization program is compiled by Matlab and the genetic algorithm (GA) toolbox (gatbx). A cutting database is set up by Access software. An optimal milling parameters database management system (DBMS) based on Browser/Server (B/S) structure is developed by ASP technique and Dreamweaver software.
HSM Strategies of CAD/CAM Systems — Part II Industrial Application
Authors: Ding Song Lin , Mo John , Yang D.
Published: January 2010

Over one hundred types of commercial CAD/CAM systems are currently used in various industries. To meet the increasing demand for high speed machining (HSM) from shop floors most of these systems have integrated functions for the generation of HSM tool path. However, the strategies they adopted and the qualities of HSM tool path generated by these packages differ significantly from system to system. This paper reviews the state-of-the-art HSM strategies adopted by industrial CAD/CAM systems. The review is based on sixteen widely used software packages which include both advanced systems and the relatively concise packages. HSM features of each system are summarized; HSM strategies adopted by those systems are presented; the advantages and disadvantages are discussed as well.
Effect of RE on Performance of Semi-Solid AlSi7 Alloy
Authors: Yi Rong Xi , Xie Shi Kun , Zheng Xiao Qiu , Ai Yong Ping
Published: January 2010

The semi-solid slurry of AlSi7 alloy was prepared by near-liquids cast processing. The effects of different content of RE on the cast performance and the semi-solid remelting performance in AlSi7 alloy was researched. The results indicated that adding RE will widen the AlSi7 alloy solid-liquid two-phase zone temperature and refine the grains, silicon will obvious metamorphoses. The best amount of RE is about 0.5%. Its semi-solid remelting organization is equilateral globular grains.
The Application of Extension Algorithms in Induction Motor Mechanical Fault Diagnosis
Authors: Chao Kuei Hsiang
Published: January 2010

The main purpose of this paper is to apply the extension method based on the spectrum of the vibration signal for motor mechanical fault diagnosis. The measured data of mechanical fault in induction motors are adopted to carry out the spectrum analysis and then establish the extension element model. According to the distance and the correlation function value concept of extension theory, one can calculate the correlation degree of various fault type and then determine the most possible category of mechanical fault in induction motors. Finally, some simulation and experimental results are made to verify the effectiveness of the proposed motor mechanical fault diagnosis method.
Glass–Forming Ability of Fe60Co8Zr10Mo5W2B15 Alloy with Industrial-Pure Raw Materials
Authors: Xiao H.X.
Published: January 2010

Special remelting techincs including repeating the heating and quenching process for several times, electromagnetic mixing during the melting, increasing the superheating temperature, prolonging isothermal time can effectively decrease or remove the effect of impurity in raw materials on the glass-forming ability (GFA) of the alloy system. These technics were introduced to improve GFA of Fe60Co8Zr10Mo5W2B15 alloys (△Tx = 64 K, Trg = 0.61, Trg’= 0.59). Bulk metallic glasses of Fe60Co8Zr10Mo5W2B15 with the shape of rods (φ3×40) and plates (1×10×20) were casted into fully glassy state. It was proved the GFA of Fe60Co8Zr10Mo5W2B15 with industrial raw materials is very close to that with high purity raw materials. Fe60Co8Zr10Mo5W2B15 bulk metallic glass with industrial raw materials shows better potential appliance for their low cost.
Glass Forming Ability and Magnetic Properties of (Fe68B25Nd7)96Nb4 Bulk Metallic Glass
Authors: Cao Y. , Chen G. , Li Yi
Published: January 2010

Flakes with a size of 20×4×0.8mm3 and rods of (Fe68B25Nd7)96Nb4 bulk metallic glass (BMG) with a diameter of 1.5 and 3mm were cast. Rods a diameter of 1.5 mm were proven to be XRD amorphous. High vacuum environment during the fabrication will benefit the formation of fully amorphous BMG. The super-cooled liquid regions of (Fe68B25Nd7)96Nb4 is 59°C and the reduced glass transition temperature is 0.624 indicating good glass-forming ability. The critical cooling rate for glass formation for (Fe68B25Nd7)96Nb4 melt is about 294°C/s by computer simulation (Fe68B25Nd7)96Nb4 BMG shows soft magnetic property while partially crystallized sample shows hard magnetic property.
Parameter Calibration of Hartmann-Shack Wavefront Sensor Based on Mode-Construction Algorithm
Authors: Liang C. , Liao W.H. , Sheng J.X.
Published: January 2010

The principle of Hartmann-Shack wavefront sensor decided that the distance between micro-lens array and the CCD is the essence of reconstruction algorithm. Because of lacking way to measure the parameter and the existing of assembly error, it will obviously cause error by using the micro-lens focus instead of actual parameter. After analyzing the Zernike polynomial for describing wavrfront aberration, a new Self-reference method is given in this paper to calibrate the parameter. The method is based on the truth that the primary aberration of point light source is defocusing amount. Through this way, the requirement of sensor assembly-precision is reduced, and the detection accuracy of Hartmann-Shack sensor is also improved in the meanwhile. Satisfying results has been achieved under the normal experimental condition using the method given in this paper.
Study on Safety and Stability of High Speed Milling Cutter Based on Grey System Theory
Authors: Jiang Bin , Xu Wen Chao , Zhang Wei , Zheng Min Li
Published: January 2010

This work investigated safety and stability of high speed milling cutter using FEM and Penghuanwu discriminance, propounded safety and stability criterion of cutter, and analyzed absolute degree of incidence on safety and stability of cutter using grey system theory, the influence laws of structure parameters and their interaction on safety and stability of cutter were acquired. Experiments of idling and high speed milling were carried out, analyzed the impact degree of structural parameters on safety and stability of cutter, and results validated the dependability and validity of safety and stability cutting criterion.
A Career Decision-Making Study Based on Value Engineering
Authors: Wang Tang Sheng , He K.R. , Hu Jian Feng
Published: January 2010

Alternative-focused thinking is conventionally recognized as the right way to make career decisions, which uses weighted mean to assess the better one. However, alternatives are relevant only because they are means to achieve values. With value-focused thinking (VFT), the authors advance decision-making values should be the primary focus of decision making rather than alternatives. VFT describes and illustrates concepts and procedures for creating better alternatives for career decision-making problems. This article articulates and uses one’s fundamental values to guide and integrate his/her career decision making activities. As a result, career decision-making study has new angle of views and explores many implicated techniques to understand a decision-making setting.