bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Conceptual Design Process for All-in-one Computer
Authors: Li Fang Yu
Published: December 2010

In order to design good product and improve the efficiency of design process, a correct product conceptual design process is discussed in the paper. The conceptual design of All-in-one (AIO) computer is studied. The sketch design and configuration, function analysis, the expression and formation of the scheme are also taken into account. This study is based on the requirements of market and user. A survey is designed to investigate user’s demand and the results are analyzed, according to the analysis results and aesthetics analysis, scheme design and model making are finished. The research on conceptual design process of AIO computer can provide a practical reference for designer.
The Correction Research of Camera Installation Error for Vision-Guide Mobile Robot
Authors: Wang Peng , Zhang Yuan , Kang Shao Chen , Xin Jing Lei
Published: December 2010

To solve camera installation error of vision-guide mobile robot, this paper proposes a vertical and horizontal proportion rectangular deformation method to realize the correction. Based on the law that camera installation error has different effects on the distortion of different areas in imaging plane, the coordinate relation transformation from object stage to camera plane is got by homogenous coordinate transformation, and the correction result be gained by the camera installation error correction matrix. It is demonstrated that the proposed correction algorithm is simplified the parameter model structure and high correction precision.
Image Tracking and Analysis Algorithm by Independent Component Analysis
Authors: Yu Cheng Yi , Chang Yi Ying , Ouyang Yen Chieh , Tai Shen Chuan , Yu Tzu Wei
Published: December 2010

Along with digitizing and multimedia era, the image has not changed from the original entity into any changes can be dealt with digital preservation methods. Although the digital image capture technology means more and more developed, but there are still many variables affect the quality of an image. An image quality usually depends on the user's usage or changes in the natural environment. Due to the natural environment of the most common factors that influence is light, so an image of the brightness distribution over the target object caused by extreme hardly recognizable condition common. Therefore, we will use the independent component analysis of an input color images Red, Green, and Blue three Color Space to the main component analysis, in order to achieve the target tracking and analysis.
Analysis of Three-Phase Power Transformer Inrush Current Magnetic Field
Authors: Li Hong Kui
Published: December 2010

This research studies the magnetic field and forces on the windings of transformer due to short circuit. Three dimensional finite element computation of three-phase power transformer is carried out. The model developed have been applied to power transformer and the results are verified experimentally. To verify the computation results, they are compared with those obtained using ANSYS software simulation.
The Research on Pure Water Hydraulic External Gear Pump
Authors: Zhao De Xin , Yuan Rui Bo , Luo Jing
Published: December 2010

This article describes the structure of pure water hydraulic external gear pump, structural design and calculation of parameters,analysises the mai spare part material of pure water hydraulic external gear pump and determines the type of the new engineering materials. Besides the surface treatment process of pump are discussed. Pure water hydraulic external gear pump is simulated by FLUENT, obtaining the parameters of the influence of the pump's performance.
Characteristic Analysis of Plasma Arc Adjusted by a Magnetic Field
Authors: Sun Jing , Xu Wen Ji , Wang Chun Yan
Published: December 2010

The image collecting devices, which consist of optical lens, neutral density filter, narrow-band interference filter, CCD and the other equipments are set up to collect the images of plasma arc column with and without external transverse alternating magnetic field (ETAMF). On the basis of de-noising and enhancing morphological characteristics to the collected images, the characteristics of plasma arc with and without ETAMF are analyzed comparatively. The results show that the application of ETAMF is capable to get oscillation of plasma arc, and change its location, shape and heat flux density distribution, which can get efficiently control in the width of heated area and flatten heat flux density of workpiece surface.
Research of Manufacturing System Based on Network Technology
Authors: Liu Xue Peng , Zhao Dong Mei
Published: December 2010

In order to meet the needs of networked manufacturing, a methodology to construct a project based on network environment is put forward and the correspondent synchronization coordination based on enterprise solution is developed. The functions of this system include coordination management , coordination interactions , collaborative browsing of part model , coordination history record , etc. Furthermore, data or knowledge may be implemented by using the coordination history recorded as an information resource
Mechanism Analysis of Automobile Brake Groan Based on Seven Degrees of Freedom Model
Authors: Meng Xian Jie , Song Zheng
Published: December 2010

Based on the review of researches on the vibration and noise related to automobile brake, a seven degrees of freedom nonlinear dynamics model is established, including powertrain system, brake subsystem and tire system. the numerical method is used for this study, calculation and analysis results show that the mechanism of brake groan is the stick-slip phenomenon between brake disk and friction pads. Brake groan can intensify corresponding to the increase of pressure in normal direction.
Design and Simulation of Single-Phase Photovoltaic (pv) Inverter Circuit
Authors: Xin Tao , Du Hai Lian , Lv Feng
Published: December 2010

This paper introduces the design and simulation of Photovoltaic DC/DC transform circuit and single-phase DC/AC inverter, the parameters are introduced, and the simulation results are analyzed.
Research on Modeling Design of Mobile Computer
Authors: Liu Yan , Song Fang Hao , Ma Fu Jun
Published: December 2010

With the development of science and technology, mobile computers have become indispensable information tools of people’s daily life. Starting with design experience, this paper discusses the innovation of design concept and emotional design of laptops modeling design by using geometrical method, human engineering, etc, which provides design ideas for designers.
Steady-State Thermal Analysis and Temperature Control of High-Speed Permanent Magnet Synchronous Motorized Spindle
Authors: Wu Zhou Ping , Li Bei Zhi , Yang Jian Guo , Feng Rui Jin
Published: December 2010

High-speed permanent magnet synchronous motorized spindle plays a crucial role in high speed grinding which could greatly improve the efficiency of cutting and reduce manufacturing cost. However, for high-speed machining, the spindle system usually generates excessive heat due to its complex structure and the high-speed rotation, resulting in the loss of grinding precision. To control and optimize the heat generation of the spindle, this paper develops a thermal model for the high-speed spindle system, and further analyzes the steady-state thermal property at different grinding speeds. Based on the result of analysis, the temperature of the spindle system is finally optimized with modified cooling system, providing a theoretical basis for the optimization of high-speed permanent magnet synchronous spindle system. After optimization, the temperature of stator reduce significantly to 33°C, which was 53°C before, accordingly the temperature of the rotor is decreased by 19°C.
Establishing 3D Mandible FEA Model via Clinical CT Images
Authors: Wu Wen Zheng , Chen Ya Dong , Cui Kun Peng , Qin Xing Jun , Wang Wan Shan
Published: December 2010

Aiming at the filature of titanium plates and screws after defective mandible reconstruction surgery, a method named Finite Element Analysis （FEA）was conducted in this paper through FEA software Abaqus with which a 3D model of defective mandible was established. The mandible 3D model was input into the Magics and remeshed. The mandible model was output in the format of .inp file from the Magics and import to Abaqus for converting from triangular meshes to tetrahedral meshes. The tetrahedral meshes totally had 71057 tetrahedral elements and 10720 nodes. The boundary constraints of the mandible 3D model were arranged. The force was applied separately in the direction of vertical, 15° and 30° with the occluding plane (teeth force range when occluding) to analyze the force. The mandible 3D model was established and prepared to be done a biomechanical analysis.
Numerical Study of Cavitation on Hydrofoils
Authors: Hu Jing , Wang Xian Zhou , Liu Ming Yue , Zhang Zhi Guo , Zhou Qi
Published: December 2010

Based on CFD technology, flow around a 2-dimentional hydrofoil of highly skewed propeller and NACA series hydrofoils are simulated using 2D incompressible Navier-Stokes equation with Realizable k- turbulence model. In the numerical simulation, the vapor volume fraction is calculated for different cavitation numbers and angles of attack by adding the mixture model. The hydrofoil’s performance and the relationship with hydrofoil parameter are qualitatively analyzed. Special focus is given to the influence of the cavitation numbers and angle of attack on cavitation characteristics.
The Study of Products Design & Developement Using Virtual Clay Modeling System
Authors: Chen Long , Wang Kun Qian , Xu Ren Ping
Published: December 2010

This paper presents a study of products design and development using virtual modeling system. By means of specific cases, it illustrates the design and development process of products from concepts to entity model, and then to massive production. Besides, it summarizes the advantages of this method, such as the free-expression modeling, lower costs, shorter development cycle, non-information cut-off, environmentally friendliness and so on.
Research on Path-Planning of Manipulator Based on Multi-Agent Reinforcement Learning
Authors: Tong Liang
Published: December 2010

Because of the dynamic characteristic of high nonlinear,strong coupling and variable structure,it is difficult to perform effective controlling on the robot manipulator by conventional controlling theory.In this paper,a new approach of multi-agent reinforcement learning method based on Kohonen net is proposed which is used in the multi-agent environment of robot manipulator path-planning and the simulation experiment shows the validity of this method.
Research on Fatigue Test of LZ20Mn2 Axle Pipe Steel
Authors: Dong Hong Lei , Huang Zhong Guo , Yuan Qing Hua , Fan Jia
Published: December 2010

The core of ultrasonic accelerate fatigue test is resonance, and specimens need resonating with the system. The ultrasonic fatigue test method was used to investigate the high cycle fatigue properties of LZ20Mn2 axle pipe steel. Tests were conducted on cylindrical dog-bone specimens, and all fatigue loadings were controlled by inputting vibration amplitude. The results showed that the S-N curve of LZ20Mn2 axle pipe steel presented a slow-decline shape and subsurface crack initiation. The fatigue fracture was observed by SEM. Two different crack initiation mechanisms were observed which were the mixed inclusions and dislocation. Crack closure effect played an important role at fatigue crack propagation area and the fracture mechanism was a typical plastic fracture.
Effect of Carbon Nanotubes on Friction and Wear Properties of Glass Fiber/Epoxy Composites
Authors: Wang Yong Kun , Xu Zhi Wei , Chen Li
Published: December 2010

Glass fiber (GF)/epoxy (EP) composites added by carbon nanotubes (CNTs) were fabricated to investigate the effects of CNTs on the friction and wear properties of GF/EP composites. The surface of the CNTs was treated with acid mixtures to improve their dispersion in the GF/EP composites. The changes of surface properties of CNTs were investigated by using fourier transform infrared spectroscopy. Ring-on-block type wear tests were performed to evaluate the frictional properties of composites. Results show that CNTs after acid treatments can improve the wear resistance and reduce the friction coefficient of GF/EP composites more remarkably than CNTs. The surface fracture of the composite was observed by scanning electron microscope.
A Calculating Method for the Movement Contrail in the Operation of Dressing the Profile Shape of Grinding Wheel Used for Numerical Control Form Grinding Spur Cylinder Gear
Authors: He Hong Xia , Liu Hong Xia
Published: December 2010

This paper introduces the machining principles and characteristics of mold grinding cylinder gear as well as the composition of a form disc grinding wheel. By using contour machining principle，a mathematical model of form grinding the involute surface of a spur cylinder gear is established. And also a calculating formula used to dress the profile shape of the transition curve of grinding wheel is given by calculating. This provides a calculation method for dressing the profile shape of disc grinding wheel in the axial section used for the operation of numerical control form grinding spur cylinder gear. The example illustrates the method is effective in the use.
Proposition of Framework for Quality Working Environment Based on Sustainable Design in Small Manufacturing Enterprises
Authors: Rahim Jamian , Rahman Mohd Nizam Ab.
Published: December 2010

Quality improvements are implemented through various systems, techniques and tools in a company. The implementation of quality initiatives are commonplace in large companies rather than the smaller ones. Small and medium-sized enterprises (SMEs) are usually constrained by their size, expertise and financial resources. Nevertheless, it is important for them to improve their quality of physical work setting and working environment to sustain a competitive advantage. 5S is one of the most widely adopted techniques for industrial housekeeping and, in improving the quality of workplace environment. Since the cost of the development and implementation is one of the main constraints for 5S program at workplace in SMEs, the sustainable design concept shall be adopted. As the main part of the research work, a conceptual model of continuous improvement initiative for quality working environment within small and medium-sized manufacturing companies was developed and proposed. The focus of this research study is on the aspect of how to implement the 5S practices by incorporating sustainable design for improving a quality workplace environment and reducing the environmental impacts through a comprehensive approach. Finally, conclusions are drawn and suggestions made for further research in SME companies.
An Adaptive Loading Mechanism Based on Logarithmic Spiral Profile Connection for Planetary Traction Drives
Authors: Chen De Sheng , Pan Nong Fen
Published: December 2010

A cylindrical roller planetary traction drive was developed. It comprises a sun roller, three planetary rollers, an outer ring, a stationary carrier and an input shaft. The sun roller is hollow, and is connected through three logarithmic spiral profiles to the input shaft. As the input shaft rotates relative to the sun roller, a wedging action takes place between the input shaft and the sun roller; this makes the sun roller generate a certain amount of elastic deformation, so an appreciable amount of contact load is generated between the sun roller and the planetary roller. The greater the input torque is, the stronger the strength of the wedging action and the greater the contact load, and vice versa; so this configuration is self-actuating. Here, as cylindrical rollers are used in the planetary traction-drive configuration, the spin motion as would present in the case that the tapered rollers were used will not occur. Meanwhile, as a logarithmic spiral is used in the profile connection, the distribution of contact stress between the two connected surfaces will be uniform. This reduces the concentration of contact stress of the connected surfaces, and prolongs the life of the contact fatigue of the contacting surfaces.
Development of Building Materials from Expo 2010 Shanghai
Authors: Shen Li Juan , Wei Yi Jing , Chen Wei Zhi
Published: December 2010

As a symbol of urban civilization, building materials play an important role in the appearance of a city and are closely related to people’s lives. Categorized into energy efficient material, human friendly material, environmentally friendly material and living comfortably material, building materials from Expo 2010 Shanghai were discussed in details. The future trends in building materials development were presented.
A Three-Phase Constitutive Model and Experimental Study for TiNiNb Shape Memory Alloys
Authors: Wang Jun , Hao Zhi Ming , Shi Ping An , Yu Shao Rong , Li Wei Fen
Published: December 2010

A three-phase constitutive model for TiNiNb shape memory alloys (SMAs) is proposed based on the fact that TiNiNb SMAs are dynamically composed of austenite, martensite and -Nb phases. In the considered ranges of stress and temperature, the behaviors of austenite, martensite and -Nb phases are assumed to be elastoplastic, and the behavior of an SMA is regarded as the dynamic combination of the individual behavior of each phase. Then a macroscopic constitutive description for TiNiNb SMAs is obtained by the conventional theory of plasticity, the theory of mixture, the theory of inclusion, and the description of phase transition by Tanaka. The method for determination of the material parameters is given. This constitutive model can describe the main characteristics of SMAs, such as ferrcelasticity, pseudoelasticity and shape memory effect.
Top-Down Formation of GaN Nanocone Arrays for Application in Field Emission
Authors: Wang Xin Zhong , Yu Guang Hui , Li Shi Guo , Wu Cheng Guo
Published: December 2010

We present a novel method to fabricate uniform GaN nanocone arrays (GNA) using Nickel-nanoisland masks. The nanoscale conelike arrays with high density can be formed over the entire 2-inch wafer by inductively couple plasma etching. The results of X-ray diffraction exhibit significant decrease on the (102) reflection in GaN sample with the GNA. Field-emission measurements show that the GNA with sharp tips have a turn-on field of ~ 5.5 V/μm. It is believed that the high aspect ratio resulting from the conelike morphology is responsible for the enhancement of the field-emission properties of GNA.
Research on the Hydrodynamics of a Horizontal Trigonal Pectoral Fin Propulsor Actuated by SMA Wires
Authors: Wang Zhen Long , Li Jian , Wang Yang Wei , Wang Yu Kui
Published: December 2010

Inspired by some batoid fishes using horizontal trigonal pectoral fin for propulsion or maneuverability, a micro flexible mimetic propulsor actuated by shape memory alloy (SMA) wires is presented. Firstly, based on the motion characters of the pectoral fin of manta ray, a simplified kinematics model was set up. Secondly, a three-dimensional numerical simulation on the oscillatory fin was performed by computational fluid dynamic (CFD) to investigate the interaction with the surrounding fluid and the propulsive force production. Thirdly, action experiment of the propulsor is done to verify the concept. At last, the propulsive performance of the propulsor is evaluated through thrust force measurement experiments. The experimental results accord with the CFD results well. The propulsor have potential feasibility applying in automatic underwater vehicles (AUV).
Mechanism of Parameters Variation about Electronic Components Subjected to High Impact Loads
Authors: Li Bo , Zhang Ya , Zhang Hong Xiang
Published: December 2010

Large quantity dynamic testing experiments are carried out to testing the parameter of electronic components in high over loading impact condition with a standard hammer machine and a high speed data collection system. And the experiments were performed for about 5000 times to more than 30 types of resistors, capacitors, transistors to test their main parameter in different stress level and fixing mode. The parameter of some electronic components appears more or less unstable, namely temporary failure, and it is sensitive to different stress level and impact direct in experiments, which can offer important value of references for reliability lifespan.
Ca2Si Crystal Grown Selectively by the Low Temperature Annealing
Authors: Pan Xi Zhong , Yang Yin Ye , Xie Quan
Published: December 2010

The two groups of Ca films were directly and respectively deposited on Si(100) substrates by Radio Frequency (R.F.) magnetron sputtering system (MS) and subsequent were annealed at 600°C for 5h, 6h, 8h, 10h and 12h in a vacuum furnace. The structural and morphological features of the resultant films are tested by XRD, EDAX and FT-IR. The cubic phase Ca2Si film is grown selectively from Ca-Si system of the existence of multiple silicide phases by an interdiffusion reaction of solid phase between the deposited particles and clusters and substrate constituents. And, the structure of the deposited films, annealing temperature and annealing time are the principal factor for the selective growth.
The Joint Measurements of Electroluminescence and Photoluminescence of PET Films under Low Temperature
Authors: Lin Jia Qi , Wang Chen , Shi Jun Hui
Published: December 2010

The EL intensity and the spectrum of the PET films were tested under the low temperature by home-made experimental set-up on the conditions of DC high electric fields and irradiated by xenon lamp. The result shows that there are emission peaks at about 350~450nm, 500~600nm and 750nm in the EL spectrum of the PET films. The intensity of light emission increases with the applied electric fields; the pre-breakdown field is about 3.3MV/cm, this threshold value is no significant change which compares with the normal temperature.
Application of Multivariable Grey Prediction
Authors: Li Ling Ling , Han Jun Jie , Wu Meng , Li Zhi Gang
Published: December 2010

In this paper, a multivariable analysis of grey prediction model MGM (1,n) is proposed ,which is based on single-variable gray prediction model GM (1,1). For multiple variables of a system, they influence each other and interrelate, MGM (1,n) model is description of each of the major relevant variables in the system from system point of view.Through comparison of an example of forecasting relay failure, can be obtained: multivariable grey prediction is more accurate and more close to the actual value than the single variable prediction.
Decision-Making Based on Dempster-Shafer Evidence Theory and its Application in the Product Design
Authors: Li Ling Ling , Li Zhi Gang , Wu Meng , Zhao Chun Tao
Published: December 2010

Decision-making is necessary in the process of product design, but in many cases, about the information of decision-making, there are various types of uncertainty, for example, ambiguity, incomplete reliability，ignorance and so on. For making the comprehensive treatment to the various types uncertainty information, this paper proposes a method of decision-making based on Dempster-Shafer evidence theory, and uses a new post-processing method to deal with the results. By means of testing and verifying the new method with specific design examples, and proved the method can be effectually applied in the product design.
Cold Forging Process Analysis and Precision Progressive Die for Cam of Low-Carbon Steel
Authors: Hu Dao Chun , Wang Lei
Published: December 2010

This paper analyzes the forming process methods of cam in CPU socket to control its open and close. The whole process is pierce, notch, the first forging forming, the second pierce(the second pilot hole), the second forging forming(sizing), impact forging forming, and trimming. The punch shape design of the first forging forming is simulated by finite element analysis. The optimized punch profile radius 0.50mm and punch size Φ10.60mm are available. Cold forging of precision progressive die is put forward. The second pierce pilot hole that newly designed is applied, which relief the deformation of pilot holes caused by severe metal flow. Compared with the traditional single operation dies, the precision progressive die based on cold forging process were proved through the practical production to be high economical efficiency, which could be the references for developing the cold forging process of producing the similar produsts.
Axle-Equivalent Method for Concrete Bridge Deck Thin Pavement
Authors: Xu Xun Qian , Liu Zhen Qing , Wu Guo Qing , Zhang Chen
Published: December 2010

An axle-equivalent system was conducted for the concrete bridge deck thin pavement design according to classification of failure types. Based on indoor experiments and theoretical analysis, the mechanical characteristics of three different axle types was studied, which were corresponding with the other two typical pavement structures, and also the parameters of each axle’s equivalent formula was put forward. Including the influential factors such as climate, environment, traffic and load condition, the developed axle equivalent formula and the parameters were modified by the field test data. The achieved axle-equivalent method can be applied in the design of a new concrete bridge deck thin pavement and the assessment of an existing concrete bridge deck thin pavement.
The Stress Field of Plane Flat Lap Interface End of Orthotropic Bi-Material
Authors: Li Jun Lin , Ren Cai Xia , Zhao Wen Ting , Zhao Jing
Published: December 2010

The orthotropic bi-material plane interface end of a flat lap is studied by constructing new stress functions and using the composite complex function method of material fracture. When the characteristic equations’ discriminates and , the theoretical formulas of stress fields, displacement fields and the stress intensity factor around the flat lap interface end are derived, indicating that there is no oscillatory singularity. There are multiple stress singularities of the orthotropic bi-material plane flat lap interface end.
Study on Fatigue Crack Growth Behavior of Casing-Drilling Steel N80
Authors: Xu Tian Han , Feng Yao Rong , Song Sheng Yin , Jin Zhi Hao
Published: December 2010

An investigation into the fatigue crack growth behavior of N80 steel was carried out for casing-drilling technology. The results show that the effect of stress ratio on the △K corresponding to access of the tensile overload region is remarkable, and increasing the stress ratio is found to increase the FCGR at the same △K and reduce △K of access of the tensile overload region; the transgranular failure machanism is dominant for the N80 steel in the all crack growth stage; the fracture surface roughness decreases as the cracks propagate through threshold region and into Paris region, whereas it increases as the cracks propagate through Paris region and into the tensile overload region; the typical ductile-dimpled fracture mechanism observed on the tensile overload region is similar to the tensile fracture mode, although the orientation of the dimples significantly inclines to fatigue crack growth direction.
Structural Design and Position and Posture Analysis of Five-Fingered Robot Hand Based on Pneumatic Flexible Joint
Authors: Geng De Xu , Zhao Ji , Zhang Lei , Zhao Yun Wei
Published: December 2010

Design and analysis of a five-fingered robot hand is presented. The robot hand has five multi-actuated fingers each with three flexible joints. Each joint is designed using a novel flexible mechanism based on elongation pneumatic artificial muscle. Its high flexibility and inherent compliance make them ideally suited for delicate tasks, e.g. grasp, pinch, and nip. Furthermore, this paper established the mathematical models to simulate the behavior of grasping; get the relationship between air pressure as well as position and posture of fingers. In view of all characteristics five-fingered robot hands are very well suited for automation and robotic applications.
The Straight Bevel Gear with Equal Conjugate Curvature
Authors: Liu Hu Ran
Published: December 2010

Inspired from the serious plastic deformation of some gears with heavy power transmission in practical usage in metallurgical industry, we believe that there must exist some kind of gear profile which is most suitable in both the contact and bending fatigue strength. From careful analysis and deep drawing investigation, we think that it is the profile of equal conjugate curvature with high order of contact, and analyzed the forming principle of this kind of profile. The contact stress is so low that even the Hertz theory, with which the contact stress can be calculated for most of the gearing, is invalid. This paper is aimed research how to calculate the contact stress of this kind of gearing.
Design of Middle-Small Enterprise Technology Service Information System
Authors: Zhao Hui Huang , Zhou De Jian , Xu Yu Ming , Liu Jia Lin
Published: December 2010

Aim to build a good service environment in public technical network and create a opportunity for middle-small enterprise developing and growing, a technology service information system (MSETSIS) is designed, according to the characteristics and requirements of middle-small enterprise. Main content, modules and performance of MSETSIS are systematic exposited; middle-small enterprise technology service information system includes four service functions, and they are divided into 19 sub modules, and the main modules are introduced in detailed. In order to improve the efficiency in selecting and optimizing manufacturing resources, genetic algorithm is used in MSETSIS. The design method has been successfully applied to the practical system, and proved the feasibility of the design.
A Review of Piezoelectric Vibration Generator for Energy Harvesting
Authors: Yan Zhen , He Qing
Published: December 2010

Piezoelectric vibration generator has the advantages of small volume and simple technology and working in various poor environments, so it will inevitably power for wireless sensor network, micro electromechanical system (MEMS) devices, and other electric devices, instead of traditional cell. First of all, the generation power principle as well as the vibration mode of piezoelectric vibration generator is presented. Then, the basic theory and its application of structural behavior and damping influence are analyzed. Finally, the problems and the challenge of piezoelectric vibration generator are discussed.
Investigation of the Dilation of Epoxy with Negative Thermal Expansion Fillers
Authors: Chang Sheng Yi , Tsai Hsi Hsun , Wang Sheng Ching
Published: December 2010

The bonding glue is well used in packaging of the opto-electronic elements. The light paths of the elements are aligned accurately before bonding, the coefficient of thermal expansion of bonding glue is much more large than the one of silicon based optoelectronic elements, the light paths of the elements are thus misalignment after the bonding. The silica filler is usually mixed into the bonding glue for lowering the coefficient of thermal expansion. In this paper, the ceramic powder of the ZrW2O8 with negative coefficient of thermal expansion is thus mixed the commercial bonding glue for deriving of the extra low dilation adhesion. The thermal expansion of the composite bonding glue with negative coefficient of thermal expansion fillers is measured accurately to compare with the filler of silica powder. The results show that a composite glue with the very low coefficient of thermal expansion is therefore acquired for packaging of optoelectronic elements.
Thermal Wavelength Stabilization of Fiber Bragg Gratings Using Bi-Metal Structure
Authors: Wang Sheng Ching , Tsai Hsi Hsun
Published: December 2010

A stabilized laser is essential for optical fiber communication network. One of the passive technique for stabilization of central wavelength of laser is based on the application of fiber Bragg gratings. Due to the positive coefficient of thermal expansion of optical fiber, the Bragg gratings within the fiber written by excimer laser gives about 0.01nm/oC shift on the central wavelength respect to the ambient temperature which leads serious problem in the communication network. Since both the temperature and tension force are linearly proportional to the central wavelength of fiber Bragg gratings. A feasible approach to derive the wavelength stabilization is to decrease the tension force of fiber Bragg gratings respect to the increase of ambient temperature. In this paper, a bi-metal structure with similarly negative coefficient of thermal expansion is used to decrease the tension force while the environmental temperature increases. Results show that the theory provides a fundamental solution of the physical data of the temperature compensated fixture for near zero shift of central wavelength. The practical compensation of the bimetal structure is non-linear due to the thermal expansion of the arm of the fixture, while the compensation is linear respect to the ambient temperature by neglecting the thermal expansion of the arm. However, this package is feasible for mass production and can be used for athermalization of the fiber Bragg gratings in optical communication system.
Serial Communication and Temperature Monitoring of MSMA Actuator Based on DS18B20
Authors: Ji Hua Wei , Wen Yong Qing
Published: December 2010

The magnetically controlled shape memory alloy (MSMA) is a new type of intelligent materials, which has large strain and high efficiency of electromechanical energy conversion, however, temperature has great influence to it. The DS18B20 digital thermometer provides 9-bit to 12-bit Celsius temperature measurements, which has an operating temperature range of -55 Degrees Celsius to +125 Degrees Celsius and is accurate to ±0.5 Degrees Celsius, Therefore it’s used to monitor the temperature of MSMA actuator in this paper. Serial communication is very important in our daily life; the paper mainly introduces hardware and software design for it and serial communication between pc and c51 based on matlab, meanwhile, drawing temperature curve by existing functions of matlab.
The Determinants of Mass Concentration of Indoor Particulate Matter in a Nursing Home
Authors: Cheng Tsung Jung , Chang Chih Yi , Tsou Pei Ni , Wu Ming Ju , Feng Yun Shu
Published: December 2010

The study was conducted to evaluate the determinants of mass concentration of indoor particulate matter in a nursing home located in Taichung, Taiwan. PM2.5, PM10, temperature, relative humidity, CO, CO2, O3 and colony counts were collected in 2 bedrooms and their adjacent outdoor environments from November 2009 to January 2010. The results of multiple regression analysis suggested that the explanatory variables which included outdoor particle concentrations, indoor occupancy, different types of activities and ventilation accounted for 40.9% and 63.4% of the variance in the indoor PM2.5 concentration in Room A which is close to neighboring buildings and Room B which is close to main traffic, respectively. The explanatory variables accounted for 49.1% and 85.5% of the variance in the indoor PM10 concentration in Room A and B, respectively. Moreover, the result of correlation analysis showed that both indoor PM2.5 and PM10 concentrations were correlated to temperature, relative humidity and CO.
Technology of Pulse Electrochemical Polishing of Stainless Steel
Authors: Zhao Zhi Yu , Zhou Guang Tao , Zhang Su Zhi , Xia Bi Bo
Published: December 2010

Pulse electrochemical polishing is an important method to improve the surface quality of metal sheet. The reasonable control of process parameters is the key to obtain high-quality polishing. In this paper mechanism of pulse electrochemical polishing of stainless steel were studied using the stainless steel sheets of SUS201, SUS202, and SUS304. The influence of the current density, pulse frequency, duty cycle, and other factors on surface roughness were examined, and the optimal parameters was determined. The research results have directional meaning to the scale polishing of stainless steel-based in manufacturing enterprise.
The Synthesis of Binuclear Mono-Cyclopentadinyl Titanocene and its Using for Aqueous Homo-Polymerization of Methyl Methacrylate
Authors: Nie Yu Jing , Cheng Zheng Zai , Lei Rui , Yan Xiao Chao , Lin Su Su
Published: December 2010

One binuclear mono-cyclopentadinyl titanocene, CpTiCl3(CH2)4CpTiCl3, has been synthesized by a new ways and characterized by 1H-NMR spectroscopy and elemental analysis. Its aqueous medium polymerization properties of methyl methacrylate (MMA) have been pursued with an anionic surfactant, sodiumn dodecylsulfate(SDS) in water. The obtained polymers were characterized by gel permeation chromatography(GPC). GPC results showed that the dinuclear titanium complex might provide PMMA with broad PDI(PDI=10.82). Influences of reaction parameters, such as temperature, time, MMA/Cat(molar ratio) and water amount were studied in detail. Under the conditions of the temperature was 55 °C, the reaction lasted l5h, the molar ratio of Cat to MMA was l:200, and the volume of water consumed was 40 ml, the conversion of MMA was as high as 70%.
Study on the Chloromethylation of Polyaniline
Authors: Nie Yu Jing , Tao Fu Yong , Cheng Zheng Zai , Lei Rui , Yan Xiao Chao
Published: December 2010

In order to improve the solubility of polyaniline, the chloromethylation of polyaniline by using paraformalclehyde as chloromethylation reagent was firstly reported in this paper. The chlorine methyl group was succesfully introduced into the chain structure of polyaniline which was confirmed by electron energy spectrum analysis. Influences of reaction parameters, such as temperature, time, and amount of paraformaldehyde was investigated by orthogonal experiment. Experimental results showed that the amount of paraformaldehyde is the biggest influence factor on the reaction, and the influence of temperature is the minimal one. Under the optimum conditions, the obtained modified polyaniline contain about 3 wt% of chlorine content under the conditions of temperature was 60 oC, amount of paraformaldehyde is 20 g and the reaction continued 8 h.
Theoretical Approach in Predicting Perforation of Aluminum Alloy Foam Target against Different Ogive-Nosed Projectile
Authors: Bao Yong Gang , Zhang Nian Mei , Yang Gui Tong
Published: December 2010

This paper presents a theoretical approach for investigating the perforation of aluminum alloy foam target against rigid ogive-nosed projectile. The target is composited by two different density single-layer aluminum alloy foam boards. The dynamic cavity expansion theory is applied to formulate analytical model. The perforating process can be divided into 8 stages. The effects of shank diameter, shank length and caliber-radius-head (CRH) on perforating resistance force and kinetic energy variation are analyzed. The results demonstrate that velocity limit increases significantly with the raising of shank diameter in the case of fixed mass and CRH has no significant influence on residual velocity and velocity limit. And the residual velocity can be predicted by the known striking velocity and velocity limit.
FBG Close-Loop Dynamic Demodulation Method and System with Temperature Compensation
Authors: Zhang Jian , Li Qiang Hua
Published: December 2010

A FBG fast demodulation system with close loop control is presented. Based on filter edge, the demodulation speed is very high. The system overcomes the strict command on matched FBG fabrication and eliminates the temperature induced error. With close loop control, the temperature induced FBG wavelength shift is compensated well.
The Application of Virtual Samples in Face Recognition
Authors: Lang Li Ying , Bao Zi Min
Published: December 2010

In this paper, it conducted a study on increasing the virtual image to improve recognition rate, and gave a simple and effective algorithm that simulated the approximate image which producted by the change of human face gesture. The experiments based on the FERET face DataBases showed that the method that this paper presented played a important role on improving the recognition rate.
A Variable Parameters Cross-Coupled Control Based on Differential Evolution Optimization in Crankpin Non-Circular Grinding
Authors: Li Jing , He Yong Yi , Shen Nan Yan , Fang Ming Lun
Published: December 2010

The tracking lag error of a single axis in non-circular grinding is hard to be reduced due to the big inertia of grinding carriage and the large acceleration of crankshaft. Thus, it’s unsatisfied to improve the contour precision of crankpin just by enhancing the tracking precision of a single axis. To obtain a more accurate contour, the cross-coupled control system is designed based on the approximation that the coupled motion between the rotation axis of crankshaft and the linear axis of grinding carriage is simplified as the coupled motion between two linear axes. And then the control strategy that the parameters of cross-coupled control system are variable along the motion path of crankpin non-circular grinding is proposed to make up for it deficiency in the control of nonlinear path. To minimizing the contour error, differential evolution algorithm is also introduced to optimize the control parameters segment by segment. The simulation results demonstrate the theory contour precision of crankpin non-circular grinding is advanced obviously by the cross-coupled control with variable parameters in comparison with the common cross-coupled control.
ItemListFCI：An Algorithm for Mining Closed Frequent Itemsets Based on Bit Table
Authors: Tang Ke Ming , Dai Cai Yan , Chen Ling
Published: December 2010

Mining closed frequent itemsets in data streams is an important task in stream data mining. Most of the traditional algorithms for mining closed frequent itemsets are Apriori-based which find the frequent itemsets from large amount of candidates, and needs a great deal of time and space. In this paper, an algorithm ItemListFCI for mining closed frequent itemsets in data stream is proposed. The algorithm is based on the sliding window model, and uses a ItemList where the transactions and itemsets are recorded by the column and row vectors respectively. The algorithm first builds the ItemList for the first sliding window. Frequent closed itemsets can be detected by pair-test operations on the binary numbers in the Table. After building the first ItemList, the algorithm updates the ItemList for each sliding window. The frequent closed itemsets in the sliding window can be identified from the ItemList. Algorithms are also proposed to modify ItemList when adding and deleting a transaction. The experimental results on synthetic and real data sets indicate that the proposed algorithm needs less CPU time and memory than other similar methods.
Wear Particles Image Segmentation Method Based on Multiscale Mathematical Morphology
Authors: Wang Guo De , Zhang Pei Lin , Li Bing , Xu Chao , Zhang An Cheng
Published: December 2010

Image segmentation plays an important role in wear particles analysis. A new segmentation method based on multiscale mathematical morphology is proposed for wear particles image segmentation. The newly introduced method employs different scale structuring elements to detect the image edge, the final edge is calculated by the weighted average method. Edge details can be remained by small scale structuring element (SE) and noise can be depressed effectively by large scale SE, therefore, the new method has great effect in edge accuracy, strong and weak edge extraction and noise suppression. The efficiency of the method is evaluated by a set of wear particles images. The comparison with the single scale SE and other traditional methods demonstrates the improvement of the new algorithm.
Multi Biometrics Fusion Identity Verification Based on Particle Swarm Optimization
Authors: Huang Ai Ming , Pen Mao Ling
Published: December 2010

In recent years, biometrics has become one of the most promising identity verification technologies. For the limitations, it is difficult for single mode biometrics to meet requirements of modern identity verification. The paper introduced several common biometrics verification methods and procedures. The limitations of single mode biometrics were also provided and data fusion technology was introduced to solve the problem. On the basis of this, Particle Swarm Optimization (PSO) neural network algorithm was used to construct multi biometrics verification system. The results of experiment based on the method shows that it can achieve better identity verification result and meet requirements of practical applications.
A Novel Global Optimization Method – Genetic Pattern Search
Authors: Zhang Yu Dong , Wu Le Nan , Huo Yuan Kai , Wang Shui Hua
Published: December 2010

A novel global optimization method is proposed to find global minimal points more effectively and quickly. The new algorithm is based on both genetic algorithms (GA) and pattern search (PS) algorithms, thus, we have named it genetic pattern search. The procedure involves two-phases: First, GA executes a coarse search, PS then executes a fine search. Experiments on four different test functions (consisting of Hump, Powell, Rosenbrock, and Woods) demonstrate that this proposed new algorithm is superior to improved GA and improved PS with respect to success rate and computation time. Therefore, genetic pattern search is an effective and viable global optimization method.
An Adaptive Intrusion Tolerance Model Based on Autonomic Computing
Authors: Wu Qing Tao , Hua Bin , Zheng Rui Juan , Zhang Ming Chuan
Published: December 2010

Intrusion tolerance has been a key technology of system survivability. To cope with the absence of self-adaptability on existent intrusion tolerance system, an intrusion tolerant model based on autonomic computing is proposed, in which the reliability of the network connection is analyzed in real time to generate the initial reliability by an autonomic feedback mechanism, and the classification between suspicious information and confident information is guaranteed for implementing the tolerance on suspicious connections through the dynamic reliability optimization. The simulation results show that the intrusion tolerant model with autonomic feedback mechanism is desirable for enhancing the system’s self-adaptive performance, making it highly promising for further study.
An Infrared Image Segmentation Algorithm Based on Spatial Correlative Information
Authors: Wang Ke Yong , Song Cheng Tian , Deng Jia Hao
Published: December 2010

Image segmentation is an important technique for image processing and computer vision. The principles of 1-D Otsu’s algorithm and thresholding through index of fuzziness are described. Since the infrared images of tank have low object-background contrasts and blurred boundaries in the complex background condition, an adaptive algorithm for image thresholding through index of fuzziness, which is combined with the spatial correlative information, is proposed. The new method makes full use of the spatial correlation of pixels, so that it can extract the detail of the image from the complex background effectively, and improve the accuracy of the segmentation. The results of experiments prove that the presented algorithm has better performance and better robustness against noise.