bluuebunny/crossref_metadata_2025 huggingface dataset:
Optical Design of Waveguide Holographic Binocular Display for Machine Vision
Authors: Wang Jian Gang , Yan Zhan Jun , Li Wen Qiang
Published: September 2013

A binocular display can satisfy competition mechanism of biological vision system and improve display precision. A binocular optical system is designed with waveguide holography (WGH) for small size and light weight. A superimposed holographic volume grating can split the image bearing lights into two equal intensity light beams. The out-coupling waveguide holographic gratings for the left and right eyes can implement image extension and imaging display. The simulation and experimental results reveal that excellent optical performances can be achieved for little distortion of less than 0.05%(nearly zero), light weight of about only 32g, and compact size. The display information can also be overlaid the outside scenes in eyeglass augmented reality and Machine Vision Display applications.
Based on RFID Technology of High-Speed Mobile Multi-Objective Binary Tree Anti-Collision Algorithms
Authors: Li Cheng Yong , Huang Yan , Zhao You Gui
Published: September 2013

In the RFID radio frequency identification system, multiple targets at high speed mobile position data transfer at the same time of channel conflict, and solving multi-objective channel conflict is the most effective method is through the anti-collision algorithm. This article will analysis RFID technology in high speed moving target in the cause of the conflict, this paper introduces the existing anti-collision algorithm and its related optimization algorithm, the paper proposes a kind of suitable for high speed mobile multi-objective binary anti-collision search algorithm for continuous collision position for parity coding mode group, through to the conflict area target estimate size to reduce the number of queries to the effective time identify multiple high-speed moving targets, can better in high speed moving target recognition application. Maltab simulation results show that the proposed algorithm outperforms the other binary tree anti-collision algorithm in effective recognition time etc are obviously improved.
Development and Research on the Control Actuator Testing System Based on Virtual Instrument
Authors: Wang Wen Hui , Xie Cheng Gang , Du Lie Bo
Published: September 2013

Control actuator vibration testing system is one of the key devices throughout the whole manufacturing line of missiles. To meet the requirements of fast acquirement real-time show, automatic test convenient for user to modify during the control actuator based on virtual instrument developing environment LabVIEW and PCI bus technology is built. Hardware composition, software development, as well as other various functions in some kind of control actuator vibration testing system, such as the analog signals generating, sampling, recurring,auto-detecting and etc., are discussed in this paper. Practices prove this system works well with stable performance, and meet the requirements of design.
Design of QPSK Modem Based on FPGA
Authors: Zhu Jin , Xu Qiu , Yan Dan Dan
Published: September 2013

Quadrature Phase Shift Keying as a efficient modulation mode to be used in wireless communication. it is significant to study its implement. This paper presents a method to design QPSK modulator and demodulator, which use field programmable gate array. We will analysis the principle of QPSK modem and will give the design method, display the block diagram of the system in this paper and discuss its feasibility. The whole system is divided into several small models. Because space is limited, we can only introduce some key modules. Such as carrier recover and bit synchronization
A Way to Modified the Effection on Trajectory Identification Accuracy Caused by Wind
Authors: Zhao Xin , Zhang Jun , Wang Yu , Liu Dong Long
Published: September 2013

Based Trajectory Identification projectile velocity sensor with high precision, interference, etc., but it is currently only limited to standard meteorological conditions ballistics identification, for non-standard analysis of the impact of weather conditions less. Through in-depth research paper based on the wind speed sensor ballistic missile identification accuracy, the paper introduces a non-standard method selected point on the trajectory identification wind impact speed by calculating fixed point identification result, you can calculate the velocity at any point recognition result, so as to achieve the purpose of correcting the wind effect and verified its feasibility.
Analysis on Flexural Bearing Capacity and Ductility of NHC Pile
Authors: Wang Tie Cheng , Wang Wei Kai , Zhao Hai Long
Published: September 2013

The flexural behavior of non-holomorphic circular pile and cylindrical pile is respectively evaluated based on the results of finite element analysis with ABAQUS. It is presented that the ultimate bearing capacities of non-holomorphic circular pile and cylindrical pile have little difference. The displacement ductility ratio of non-holomorphic circular pile lies between 3.38 and 3.64, indicating that the NHC pile has better ductility.
Compact Wideband Bandpass Filter Using Stepped Impedance Resonators Loaded by Open Stubs
Authors: Ma Xing Bing , Zhang Feng Shan , Liang Cai Feng
Published: September 2013

A compact bandpass filter has been investigated in this paper, the filter has four stepped impedance resonators, six open stubs are loaded on the two inner resonators, by adjusting sizes of six open stubs, a wide passband can be obtained. This proposed filter contributes respectively one transmission zero on either side of the wide passband. The proposed topology is demonstrated with a design operating at 5.205 GHz with 20.2% bandwidth, and more than 20dB of spurious suppression from 0 to 4.26 GHz and from 6.27 to 8.85 GHz is demonstrated in experimental results, which match well with the simulated results.
Research on Testing System of Single Robot Based on Virtual Prototype for Robot Soccer
Authors: Wang Xian Lun , Wang Hua Jie , Cui Yu Xia
Published: September 2013

Robot soccer games are important activities for the research of the system design and intelligent control, but the actual implementation process is often limited to the actual quality and quantity of equipment. A testing method based on virtual prototype software is proposed for the single robot in soccer games on the basis of theoretical analysis of the robot soccer system. A real-time interaction method is realized between the control algorithm and system model. According to the position of the ball and robot fed back from the model, the control program can plan appropriate trajectory and sends command to the left and right wheel, which realizes the real-time tracking of the ball. The simulation and actual combating results show that the method can be used for the simulation of the actual robot soccer games and the optimization of the control algorithm.
Compensations of the Discontinuous Nonlinearities in the Independent Joints Control of an Articulated Robot
Authors: Receanu Danut
Published: September 2013

The paper presents the nonlinear torsional vibrations control of the joints in an articulated industrial robot, in Simulink /MATLAB. In this case, it is considered the classical linear control combined with compensations of the natural discontinuous nonlinearities in a robot with low speed.
Study on Vibration Transmission, with Application to the Calibration of a Measuring Stand
Authors: Craifaleanu Andrei , Dragomirescu Cristian , Orăşanu Nicolaie , Costache Adrian
Published: September 2013

The paper studies the vibration transmitted by a mechanical oscillating system to its fixing device. The influence of the mechanical characteristics (inertial and elastic) of the device on the quantities specific to the free and forced vibration, respectively, of the principal system, is analyzed. In this context, the paper investigates the possibility to correlate the vibrations of the mechanical system with the vibrations measured on the fixing device. The conclusions of this study can be used for the calibration of vibration measuring stands. In the final part, a practical application is presented, aimed to compare the theoretical results with the data obtained by measurements performed on an experimental model built by the authors.
Mechanical Properties of Hydroxyapatite Doped with Magnesium, Used in Bone Implants
Authors: Suciu Oana , Ioanovici Teodora , Bereteu Liviu
Published: September 2013

Hydroxyapatite is a biomaterial, more exactly a bioceramic, from a category of materials frequently used in bone implants. In order to improve mechanical properties, hydroxyapatite is doped with different chemical substitutes, among which the most used are: Mg2*, Zn 2*, La3*, Y3*, In3* Bi3* CO32-, Si and Mn. In the paper are presented the modality of obtaining hydroxyapatite doped with magnesium through wet precipitation method and also the determination of its main mechanical characteristics. There is also an analysis on the effects of magnesium on the following mechanical properties: density, hardness, longitudinal modulus of elasticity, conductibility and thermal stability.
Exposure of Workers to Noise in Mining Industry
Authors: Simion Sorin , Vreme Ciprian , Kovacs Marius , Toth Lorand
Published: September 2013

The troubles generated by noise represent an issue, unanimously agreed by everybody, and this have numerous psychological and social implications.
The Computer Aided Passive Reduction of Vibration to Desired Vibration Amplitude
Authors: Dymarek Andrzej , Dzitkowski Tomasz
Published: September 2013

The paper presents the problem of vibration reduction in designed discrete mechanical systems. The passive vibration reduction based on the synthesis method by using the Synteza application. The presented application has been developed by performing the algorithmization of formulated and formalized synthesis methods provided by the authors.
The Vibrations of the Engine with Neo-Hookean Suspension
Authors: Stanescu Nicolae Doru , Popa Dinel
Published: September 2013

Our paper realizes a study of the vibrations of an engine excited by a harmonic force and sustained by four identical neo-Hookean springs of negligible masses. The considered model is one with three degrees of freedom (one translation and two rotations) and we obtain for it the equations of motion. Using these equations, we determine for the unexcited system the equilibrium positions and their stability. We also study the small oscillations about the stable equilibrium positions and we find the fundamental eigenpulsations of the system. For the case of the excited system we perform a numerical study considering the situation when the pulsation of the excitation is far away from the eigenpulsations and the situation when the pulsation of the excitation is closed to one eigenpulsation, highlighting the beat phenomenon.
Assessment of Corrosion Damages with Important Loss of Mass and Influences on the Natural Frequencies of Bending Vibration Modes
Authors: Gillich Gilbert Rainer , Praisach Zeno Iosif , Bobos Daniel , Hatiegan Cornel
Published: September 2013

Corrosion as material destruction affects the safety of structures, leading to more serious consequences than the simple loss of a mass. The effect of corrosion on the dynamic behaviour of structures act in two ways: the loss of mass increases the natural frequencies, opposite to the effect of stiffness loss. This paper present the results of researches made to extend the mathematical relation presenting the influence of damage location and severity on the natural frequency changes, by adding the effect mass loss. Therefore we modeled the beam once with the discontinuity and loss of mass, afterwards the damaged segment is replaced by an intact one but having the mass similar to that of the damaged segment. This permitted to plot frequency shift curves for both cases and to contrive the relations defining that curves. Finally a relation summarizing the both effects was contrived; it was confirmed both by numerical simulations and experiments.
New Mapping Solutions and Line Soliton Excitations in a (1+1)-Dimensional Dispersive Long-Water Wave System
Authors: Shi Ying , Wang Bing Ke , Ma Song Hua
Published: September 2013

With the help of the symbolic computation system Maple and the mapping approach and a linear variable separation approach, a new family of exact solutions of the (1+1)-dimensional dispersive long-water wave system (DLWW) is derived. Based on the derived solitary wave solution, some novel localized excitations are investigated.
Shear Capacity of Hexagonal Masonry Walls with Hollow and Solid Blocks
Authors: Chang Kug Kwan , Seo Dae Won
Published: September 2013

Masonry structures are used throughout the world for the construction of residential buildings. However, from a structural viewpoint, the masonry material is characterized by a very low tensile strength; thus, masonry construction often present diffuse fracture patterns. Moreover, masonry bearing and shear walls have been found to be vulnerable to earthquakes. In this study, to improve the seismic performance of masonry structures, hexagonal blocks were developed and six masonry walls used in hexagonal block were tested to failure under reversed cyclic lateral loading. This paper focuses on an experimental investigation of different types of wall used in hexagonal blocks, i.e. walls with different hexagonal blocks and with different reinforcing bar arrangements, subjected to applied cyclic loads. The cracking and damage patterns and hysteretic feature are evaluated. Results showed that damage to blocks in reduced and brittle failure is avoided by the comparatively hexagonal block walls than the existing masonry walls.
A Model for the Pull-In Parameters of Magnetostatic Actuators with Fringing Effect
Authors: Fang Yu Ming , Qie Jun Jian
Published: September 2013

Predicting Pull-In parameters is crucial in the design of MEMS actuators. In the past, the Pull-In parameters of magnetostatic actuators with the fringing field effect are often estimated using finite element method (FEM). However, FEM is cumbersome, time consuming and non-transparent, which is not convenient for the design optimization. Usually, there are a simple analytical model without leakage reluctance and a detailed analytical model with leakage reluctance respectively. This paper used the two models to derive the Pull-In model of magnetostatic actuators respectively. The accuracy of the two Pull-In models is examined by comparing their results with the FEM results. Simulation results show that the Pull-In model without leakage reluctance is unsuitable to predict Pull-In parameters. The Pull-In model with leakage reluctance has shown a good agreement with the FEM results for a wide range of gap spacing.
Theory and Method for Simulation Evaluation of Accelerated Degradation Test Plan Based on Multiple Performance Parameters
Authors: Pan Jun , Wang Meng , Chen Wen Hua , Xu Rui Min
Published: September 2013

For reasonable evaluating problem of accelerated degradation test (ADT) based on multiple performance parameters, according to proposed simulation evaluation rule of ADT plans, taking variance mean and standard deviation of product reliability estimate as evaluation criteria of test plans accuracy and stability, the numerical simulation and simulation evaluation method for ADT plan based on multiple performance parameters are established. Simultaneously, by using maximum likelihood estimation (MLE) theory, the mathematic model for simulation evaluation of ADT based on multiple performance parameters is established. The simulation evaluation result of Nitrile Butadiene Rubber (NBR) O-ring accelerated degradation test plan shows that compared with the traditional test plan, the optimized test plan can improve estimated accuracy and stability.
Automotive Engine Performance Testing System Based on LabVIEW
Authors: Chen Guo Fan
Published: September 2013

A set of LabVIEW-based computer testing system was designed for replacing the existing dispersion detected manual bench tests of Santana 2000 AJR engine, can be centralized and intuitionally acquire the test parameters and improve test efficiency.
Parametric Study in Thermal Optimization Design of Multi-Chip Module
Authors: Zhang Jian , Zhang Dong Lai
Published: September 2013

A three dimensional model of Multichip Module (MCM) is built with ANSYS. The temperature and thermal stress field distribution are studied. Taking into account the global heat dissipation and the local thermal stress, the effect of structure parameters and material properties on the maximum chip junction temperature and the maximum thermal stress of MCM are studied. The four design parameters are the thickness of the substrate, thermal conductivity of the substrate, thermal conductivity of the thermal grease and convection heat transfer coefficient. This paper gave the method to reduce the temperature, and the results provided an efficient basis for the compromising design of thermal stress, which is benefit for the thermal optimization of MCM.
Radial Distortion Correction of Fish-Eye Lens Using Straight Lines
Authors: Ha Jong Eun
Published: September 2013

Fish-eye lens is used in various applications because it can give wide field of view. But, it deviates from the conventional pin-hole camera assumption. It has large radial distortion compared to the conventional lens. In this paper, we present an algorithm for radial distortion correction of fish-eye lens using the property of straight line. First, we estimate the center of radial distortion using the algorithm of Hartely and Kang [4]. We adopt fish-eye lens model of Devernay and Faugeras [5] and estimate the parameter thorough searching. We use planar pattern with chessboard and generate undistorted points by given parameter value. We evaluate the correctness of the parameter by checking the distance of a point to the fitted line. In experiments, we compare proposed algorithm with Wang et al. [6]. Proposed algorithm gives more stable result with less distortion error.
Computerized Assessment for Early Screening of Children with Handwriting Difficulty
Authors: Neo Chin Chea , Eileen Su Lee Ming , Puspainayat Khalid , Yeong Che Fai
Published: September 2013

This study aimed to investigate and identify the parameters that can be used in recognition of basic stroke patterns including straight lines, oblique lines, circles, and curves. The parameters determined are intended to be utilized in handwriting assessment system as a proposed method for screening of handwriting difficulty problem (HWD) among pupils. Seventeensubjects,agedbetween 7 and 8 years old, participated in this experiment. Each subject was requested to draw a series of principal graphic pattern (lines, circles and curves) using the computerized haptic system developed. Statistical analysis revealed that the threshold value used in identification of straight line patterns and angle difference range from-10.8963° ~ 54.4008°. The threshold value to identify a circle is-16.5435°< gap Angle < 64.2014°, and curve for 79.0398°< gap Angle < 187.7604°.
Effect of Intermittent Haptic Disturbance in Motor Skill Training
Authors: Siti Nor Zawani Ahmmad , Eileen Su Lee Ming , Yeong Che Fai
Published: September 2013

The aim of this study is to evaluate the effectiveness of haptic disturbance where the intermittent force field will applied in training motor skill. A test group (4 subjects) was trained using intermittent divergent force field while a control group (4 subjects) was trained in null force field. The parameter such as error trajectories, motion smoothness and the trial time were measured and a statistical analysis was done in order to identify motion improvement when using the proposed training method. Both groups showed motion improvement in reducing mean error, mean number of zero crossing (indicate the motion smoothness) and mean trial time after training. Only the motion smoothness in the test group improved significantly after training, in contrast to the control group, which showed no significant difference.
Object Manipulation Using Kinect as the 3D Sensor
Authors: Kim Dong Whan , Ha Jong Eun
Published: September 2013

ndustrial robot can extend its capability adopting sensors such as camera and laser range finder. In this paper, we deal with object manipulation including grasping objects on the table and inserting them into the hole on the vertical plane. Kinect is used as the 3D sensor. First, object location and target location is computed after processing 3D data. Robot motion obtained by solving inverse kinematics can have errors so that we adopt visual feedback style approach. Chessboard type marker is attached on the end-effector of the robot and its location with respect to the target is used to correct the robot motion.
Design and Implementation of a Kind of Intelligent Electric Blanket Temperature Control System
Authors: Li Rong , Duan Zhe Ming , Zhou Wei , Dong Bing Chao
Published: September 2013

Temperature control is the key problem in the design and manufacture of electric blankets. In order to solve current technological failure to real-time control of the temperature of electric blanket, this paper applies technical means of DS18B20 temperature acquisition and relay control temperature heating, together with key circuit, display circuit as well as other auxiliary circuit, and the system achieved electric blanket working temperature real-time intelligent control. Relay output controlled the temperature closed loop control by single-chip microcomputer, and a new type of intelligent temperature control technology of electric blanket is developed, real-time temperature control is enhanced, which improved the security and energy conservation of electric blanket.
Motion Control and Implementation of Glass-Curtain Cleaning Robot
Authors: Cheng Sheng , Lu Jing Li , Wang Lu Dan , Zhang Jiang Wei
Published: September 2013

Glass-curtain cleaning robots are newcomers to the cleaning field and were invented for the cleaning of glass curtain buildings. They not only need to clean the glass, but also to move on the glass curtain wall in the horizontal and vertical direction. With progressive urban development, more and more buildings use glass curtains as wall decoration. As atmospheric pollution is growing more and more serious, the buildings glass curtain walls get soiled more and more easily and are increasingly difficult to clean. Therefore glass-curtain cleaning robots have been receiving increasing interest in the cleaning field and have become a research hotspot in the application and research of robotics..
Using Smartphones as a Tool to Capture Road Traffic Attributes
Authors: Guido Giuseppe , Vitale Alessandro , Saccomanno Frank Fedel , Festa Demetrio Carmine , Astarita Vittorio , Rogano Daniele , Gallelli Vincenzo
Published: September 2013

Road network management under critical conditions is achievable by adopting technologies that trace vehicles and capture unsafety events to provide users with real time traffic information. Most common approaches used to acquire vehicle tracking data are based on video image processing algorithms and satellite navigation systems. However, many studies are increasingly focused on the emerging smartphone technologies for tracking vehicles. The aim of this study is to present a procedure for acquiring vehicle tracking data from smartphone sensors, supporting managers of transportation systems to take effective decisions on their networks, especially in conjunction with special events and/or critical road safety issues.
Face Image Feature Extraction and Feature Selection
Authors: Tian Yang Meng , Zheng Yu Duo , Jin Wei , Du Gai Hong
Published: September 2013

In order to solve the problem of face recognition, the method of feature extraction and feature selection is presented in this paper. First using Gabor filters and face image as the convolution Operator to extract the Gabor feature vector of the image and also to uniform sampling; then using the PCA + LDA method to reduce the dimension for high-dimensional Gabor feature vector; Finally, using the nearest neighbor classifier to discriminate and determine the identity of a face image. The result I get is that the sampled Gabor feature in high-dimensional space can be projected onto low-dimensional space though the method of feature selection and compression. The new and original in this paper is that the method of PCA + LDA overcomes the problem of the spread matrix singular in the class and matrix too large which is brought by directly use the LDA.
The Application of Database Connection Pool Based on Java in Things Networking
Authors: Jing Xiang Shun , Huo Meng You
Published: September 2013

In view of the application of database operation in the things networking, this paper introduces the principle, the working process, the key technology and the realization method of the database connection pool. For the database operation which used JAVA language to formate, we contrasted the accessing time between use connection pool and do not use connection pool. The results show that the appropriately use of the database connection pool technology can improve the real-time performance of the database operation in things networking greatly.
Numerical Simulation and Parameter Optimization of Hot Pushing Elbow Pipe Bending Process
Authors: Lu Xiao Yang , Zhou Qi Tao , Huang Li Li , Liu Jin Ming
Published: September 2013

On the basis of the experiments, hot pushing pipe bending process on ox horn core bar is simulated by using MSC.Marc software and orthogonal testing method. Simulations and optimization of sixteen possible combinations of the three parameters T, v and f are carried out with orthogonal testing method L16(43). Aimed at the uniform wall-thickness of elbow pipes, the influence regularity and the influence degree of heating temperature T, pushing speed v and friction coefficient f on the pipe quality are analyzed. The best parameter of hot pushing pipe bending process are T=750 °C, v=4 mm/s and f=0.16.
Forming Process and Mechanical Properties of Fiber Reinforced Polymer Concrete for Elementary Machine Parts
Authors: Bai Wen Feng , Yin Peng , Yan Shou Cheng
Published: September 2013

For the good vibration alleviating properties, polymer concrete (PC) has attracted much attention in the field of elementary machine components. In order to get more excellent mechanical properties, the forming process and mechanical properties of PC were concerned. In this research, glass fiber and carbon fiber were applied to improve the mechanical properties of PC. A series of PC and fiber reinforced polymer conctete (FRPC) specimens were prepared basing on the orthogonal tables for property test. Compression strength test was carried out. It is obvious that FRPC is better than PC as far as compression strength is concerned, and carbon fiber reinforced polymer concrete (CFRPC) is better than glass fiber reinforced polymer concrete (GFRPC). Trend curves about the relationship between fiber length and compression strength, as well as that between fiber dosage and compression strength were drawn. Relationship between the considered factors and compression strength is analyzed basing on the experiment results and the trend curves. Strengthening fibers would bear most of the internal stress when the specimen is faced to outer loads. Thus, FRPC has much better properties than PC. Mechanical properties of CFRPC are relatively better than that of GFRPC, for the strength of carbon fiber is better than that of glass fiber. It could be concluded that glass fiber is the proper strengthening fiber for PC considering both technical and economical factors.
Grinding Force Model for Low-Speed Grinding Based on Impact Principle
Authors: Liu Ming He , Zhang Xiu Ming , Xiu Shi Chao
Published: September 2013

In the low-speed grinding process, the force generated when the wheel grinding the workpiece is the result of sliding friction, plough and cutting. While in the actual study, the cutting process has attracted extensive attention. Impact effect to the entire grinding process on the contact is ignored so that the error exists between the calculation grinding force and the measured grinding force. Basing on the shock effect to the grinding process, the paper divides the contact area into impact area and cutting area. And the model of impact load generated from single grit is built. Moreover, the grinding force theoretical calculation model and total grinding force mathematical model is also constructed by analyzing the impact load affecting on the grinding force mechanism. Finally experimental study verifies the correctness of theoretical analysis.
Experimental Study on the Thread Turning Performance of Two TiAlN Coated Thread Inserts with Different Features
Authors: Li Kang , Li Peng Nan , Chen Ming
Published: September 2013

With the development of the coating technology, coated tools have been widely used in processing industries. Thread turning is one of its applications. The performance of coated thread inserts varies with the change of coating material, coating thickness, matrix material and tool structure. Two tungsten-cobalt type alloy matrix, TiAlN coated thread inserts with different coating thickness, rake face type had been employed to conduct the thread turning experiments. By analyzing the cutting forces, chip formation and tool wear, it was found that insert with coating thickness of 4.35 μm would result in less tool wear under MQL condition, smaller cutting force, better chip morphology under dry condition compared with insert with coating thickness of 2.38 μm.
Comparison of Material Removal Characteristics in Single and Multiple Cutting Edge Scratches
Authors: Chen Xun , Öpöz Tahsin Tecelli
Published: September 2013

This paper presents the important characteristics of material removal mechanism during single grit scratching test. Material removal mechanism in these scratches shows cutting and ploughing action varies with the number of cutting edges leading to different cutting force and specific energy. According to experimental results, single edge scratches are more efficient cutting while multiple edge scratches give more ploughing actions, which consume energy with little contribution to materials removal. The results provided an important insight of material removal during grinding process.
Study on Numerical Simulation and Experimental of Cutting Force in Turning Machinable Glasses Ceramics
Authors: Ma Lian Jie , Zhang Xiao Jiang , Gong Ya Dong
Published: September 2013

Through turning experiment of machinable glass ceramics, the characteristics and law of turning force was studied. Results indicated that the overall changing process of cutting force was sinusoidal. If the cyclic fluctuation caused by system vibration was neglected, the changing process of turning force was scalariform. Through designing orthogonal experiment and applying numerical simulation of multiple regressing theory based on least square algorithm, mathematical model of turning force was established related with process parameters. R-test, F-test and P-test were carried out on the model respectively. The test results showed that the model had high precision. It could guide to cut machinable glass ceramics on prediction and controlling of turning force in some degree.
A Study on Ultrasonic Assisted Grinding of Nickel-Based Superalloys
Authors: Song Wen Qing , Wu Yong Bo , Cao Jian Guo , Niu Jing Ti
Published: September 2013

Ultrasonic assisted grinding experiments were carried out to evaluate the effects of the ultrasonic vibration (UV) on the face grinding characteristics of nickel based superalloy of Rene77. In experiments, an electroplated cBN grinding wheel was ultrasonically vibrated dominantly along its axis. The experimental results indicated that the X-axis and Y-axis components of grinding forces with UV were smaller by 44.5% and 31.6%, respectively, than those without UV. The usual fractures and debris on the surface of workpiece disappeared and the work-surface roughness Ra was decreased by 42.3% once the UV was applied. The abrasion of the grinding wheel without UV is more serious than that with UV.
Study on the Characteristics of New Abrasive Medium for Abrasive Flow Machining
Authors: Gao Hang , Fu You Zhi , Zhu Jian Hui , Wu Ming Yu , Sun Yu Wen
Published: September 2013

Abrasive medium plays an important role in the application of abrasive flow machining (AFM), a process that finishes complex internal and external geometries. A new abrasive medium needs to be fabricated due to a lack of literature on it. In this work, a new abrasive medium was fabricated by using styrene butadiene rubber (SBR) as carrier and DF-101S was used to study its characterization. Results showed that new abrasive medium with good fluidity and temperature stability was obtained. Processing experiments have also been carried out by using new abrasive medium and MLLD60, and ZYGO was used to study the surface characteristics of the work-piece. Experimental results indicate that the new abrasive medium is applicable to AFM process.
Polishing Characteristics of a Low Frequency Vibration Assisted Polishing Method
Authors: Lin Wei Min , Chee Sze Keat , Suzuki Hirofumi , Higuchi Toshiro
Published: September 2013

Demands of precision molds with complicated microstructures for digital devices such as DVD pick-up system, and medical devices such as μ-TAS and solar optics etc. are increasing. To enhance precision, the structured molds must be polished after grinding or cutting in order to improve the surface roughness. In this paper, a two-dimensional low frequency vibration (LFV) polishing actuator using PZT is proposed and developed. The LFV consists of four mechanical amplitude magnified actuators, a multilayer stacked piezoelectric actuator (PZT) incorporated with mechanical transformer, and a center piece. In the polishing experiments, HIPM workpieces were polished with WA slurry by the rotation & revolution type polishing method (RRP). The surface roughness of the work pieces and material removal amount (polished amount) was also evaluated. From the experimental results, it was found that the application of low frequency vibration is useful for realizing higher precision in the polishing of micro structured molds.
Mathematical Modeling and Parametric Design of Taper End Mills
Authors: He Li Lun , Wang Xi Bin , Liu Zhi Bing , Chen Ming , Xu Zong Wei
Published: September 2013

The mathematical modeling of the cutting tools is an important aspect for the design and manufacturing engineers from the viewpoint of shape realization. Taper mill is composed of side and end edges. In order to make each patch closely combined, the groove section is designed by considering the relation among tapered radius, groove depth and radius of inner land. Through translation and rotation of shape curve, the side flute and end flute model can be established. These models can be rendered in three dimensional software according to parametric design of taper end mills. And this methodology can be easily extended to design, manufacture other tools.
Research on Cutter-Contact Point Data Calculation of Robotic Abrasive Belt Polishing for Gun-Receiver Surface
Authors: Huang Yao , Huang Yun , Cheng Rong Kai
Published: September 2013

Coordinate transformation in robotic abrasive belt polishing system and the calculation method of robot working point by cutter-contact point data are analyzed in this paper. Calculation process of cutter-contact point data is given in this paper, the process mainly includes acquisition and discrete of polishing tool path and the associated vector calculation. Subsequently, detail of the process such as tool path pattern, row spacing, step distance and best contact conditions are analyzed and calculated. Finally, in visual studio environment, the cutter-contact point data of gun-receiver surface is generated by calling UG / Open API function.
An Approach to Improve Machined Surface Finish in Micro Milling
Authors: Liao Yunn Shiuan , Huang Chun Lin
Published: September 2013

Micro milling has been known to behave quite differently from conventional macro milling. The effect of cutting speed on the machined surface roughness in micro milling of ductile materials was investigated in this paper. The micro flat end milling cutters of the diameters of 0.5 mm and 0.3 mm were taken to machine 6061 aluminum alloy and S20C low carbon steel. For comparison purpose, the cutter of the diameter of 10 mm was tested as well. It is found that the machined surface finish is closely related to the cutting speed. For a large size cutter, the roughness decreases with the increase of cutting speed as expected. But the decreasing trend is valid only up to a certain speed for the small diameter cutters. It is also noted that beyond this speed limit broken and powder type chips form easily. These chips will adhere to the machined surface and tool face and deteriorate machined surface as a result. Based on this finding, an approach by directing the cutting fluid to the cutting zone via high pressure air assistance is proposed. It is verified that the cutting force and its variation are greatly reduced, tool wear becomes less, and finish of the machined surface is significantly improved.
Experimental Research on Surface Residual Stress of Quenched GCr15 Steel in Ultrasonic Aided Turning
Authors: Jiao Feng , Liu Xiang , Zhao Chong Yang , Zhang Xiong
Published: September 2013

Surface residual stress has become one of the important indexes measuring surface integrity in hard turning of precision parts. The type of surface residual stress and the influence rules of cutting parameters on surface residual stress in hard turning of GCr15 steel are studied in this paper. Research results show that no matter in common or ultrasonic turning, tangential surface residual compressive stress can be found in machined surface. The effect of cutting speed on the residual compressive stress is the greatest, the effect of feed rate takes the second place and the effect of depth of cut is minimal. The conclusions have provided experimental basis for enhancing the surface integrity of quenched GCr15 steel precision parts.
Friction Evolution in Running-In of Sliding Wear of Cast Iron Processed in Gleeble
Authors: Zhang Qi , Jiang Zheng Yi , Wei Dong Bin , Xie Guo Liang , Han Jing Tao
Published: September 2013

As limited results were reported in terms of the evolution of sliding friction with growth of oxide layer in thickness during running-in, a pin-on-disc wear test was carried out in this study. 4.8Ni-1.5Cr cast iron as core layer and low carbon steel as outer layers, were thermo-mechanically processed via three different routes. For samples with lower hardness due to their predominantly austenitic or martensite retarded matrices, we found that initially rapid increase of thickness of oxide layer continually lowers the sliding friction. However, after the oxide layer was beyond a certain thickness, the sliding friction began to increase consecutively. After a fluctuation of friction caused by the break-down of oxide, a mild equilibrium wear with roughly constant friction followed.
Visualization of 3D Topography of Grinding Wheel Surface Dressed by Rotary Diamond Dresser
Authors: Kubo Akihiko , Chowdhury M.A.K. , Noda Shoma , Tamaki Junichi , Sharif Ullah A.M.M.
Published: September 2013

A computer-aided simulation was developed to visualize the three-dimensional topography of a grinding wheel surface dressed by a rotary diamond dresser (RDD), and the effects of up-cut and down-cut dressing on the roughness of the dressed surface were examined to demonstrate the effectiveness of the simulation. In the case of single-pass dressing, the roughness of the grinding wheel surface decreased with decreasing dresser feed rate and approached a constant value depending on the velocity ratio of the RDD to the grinding wheel. In the case of multipass dressing, up-cut dressing provided the grinding wheel with a surface topography which was much more stable than that provided by down-cut dressing.
Machining Characteristics of Multilayered Thin Film Solar Panels in Diamond Wire Sawing and Grinding
Authors: Huang Han , He An Shun , Kang Cheng Wei , Zhang Yu Xing , Chen Feng Jun , Huang Hui , Yin Shao Hui , Xu Xi Peng , He Yue Hui
Published: September 2013

t is challenging to achieve good surface quality and high efficiency simultaneously when machining thin film solar panels. In this study the machining characteristics of a multilayered thin film structure were investigated using diamond wire sawing and grinding. It was found that the efficiency in sawing was significantly greater than that of the employed grinding process, but the machined surface quality was much worse. The results indicated that grinding could still be the solution for such processing and sawing must be improved before this technology could be further progressed for machining thin film multilayered structures.
Variation of Concrete Strength with the Insertion of Carbon Nanotubes
Authors: Haddad Assed N. , de Morais Jorge F. , Evangelista Ana Catarina J.
Published: September 2013

Nanomaterials could change the face of modern construction because they are more resistant, more durable and have notable features. Concrete is a material widely used in construction industry worldwide. Carbon nanotube has been considered a new and outstanding material in nanoscience field with great potential application in the construction industry. The study presented in this paper, aims at assessing how carbon nanotubes can affect cement composites and so the concrete, in terms of microstructure and physical-mechanical properties. Three different ratios of carbon nanotubes have been searched: 0.20%, 0.40% and 0.60%. To evaluate the mechanical properties of the samples, destructive and non-destructive tests were carried out to obtain compressive strength, tensile strength by diametrical compression, dynamic modulus of elasticity as well as the determination of their deformation properties. This work also aims to motivate entrepreneurs and professionals in the sector of civil engineering on the advantages of the application of nanotechnology in construction, as well as providing information to the scientific and technological community in general.
Laser Driven Paraffin Microsphere Transportation on a Single Carbon Nanocoil
Authors: Sun Yan Ming , Liu Yu Li , Ma He , Pan Lu Jun
Published: September 2013

Laser driven mass transportation on a single carbon nanocoil (CNC) has been investigated, by regulating the controlling current and the laser focus position. It is found that a paraffin microsphere on a single CNC can be removed by the irradiation of an infrared laser beam on the CNC body near themicrosphere. This phenomenon is explained by a thermal driven forceresulted by a temperature gradient along the CNC around the irradiation spot wherethe laser energy is transformed into thermal energy.
Research on Emergency Management System Based on Cloud Computing
Authors: Chen Ying Xin , Xie Chun Bo
Published: September 2013

When emergencies occur, there will be a lot of problems, such as information redundancy and the asymmetry of information in rescue organization, which seriously affect the efficiency of emergency management. To solve these problems, an emergency management system based on cloud computing is proposed, and cloud service architecture is designed, which will contribute to the optimization of emergency management model in China.
Path Programming and Motion Controlling of AMR
Authors: Luo Jun Hong , Zhang Yong , Wang Xiao Hui
Published: September 2013

This article researches AMR environment modeling, path programming, as well as its motion controlling in accordance with AMR structural model of experimental reference system under dynamic uncertainty surround, based on summarizing advanced theories about intelligent navigation on board and aboard. It establishes theory foundation for going a step further researching path programming and motion controlling of AMR.
The Select Device of Weight Coefficient in the Vehicle-Use Engine Performance Optimization Process
Authors: Luo Jun Hong , Wang Xiao Hui , Zhang Yong
Published: September 2013

Vehicle-use engine performance optimization question belongs to many target decisions. A question that meet widespreadly in many target decisions is the select of weight coefficient, and how convert many targets as the question of simple target. This paper's tallying up four kinds of the select devices of weight coefficient in the vehicle-use engine performances optimization process according to the different circumstance.
Growth and Characterization of PbI2 Thin Films by Vacuum Thermal Evaporation
Authors: Agrawal Harshita , Vedeshwar A.G. , Saraswat Vibhav K.
Published: September 2013

The aim of this study was to investigate the morphology and optical absorption of PbI2thin films. PbI2films of different thickness were deposited on glass substrate at ambient temperature by thermal evaporation technique. The deposition rate was optimized at 1-2 nm/s to grow uniform good quality films. The structural analysis of the films was carried out by X-ray diffraction (XRD). The morphology of so prepared films was studied by Scanning Electron Microscope (SEM). The absorption spectra were recorded using a UV-Vis fiber optics based spectrophotometer. All the measurements in the present work were carried out at room temperature (~300 K). PbI2seems to have a very strong affinity for the growth of preferred (001) orientation. The d spacing of (00l) peaks match quite well with ASTM data for 2H polytype of PbI2which confirms the stoichiometry. A uniform spherical grain size growth is clearly evident from SEM micrographs. Optical absorption analysis indicates that the Lead Iodide is having a direct optical band gap of about 2.45 eV. The variation of band gap with film thickness could be qualitatively understood as due to the quantum confinement effect.
Morphological and Optical Properties of Cd1-xCoxS Thin Films by Liquid Phase Chemical Bath Deposition
Authors: Mane Santosh , Pingale Pandurang , Karande Vikram , Deshmukh Lalasaheb
Published: September 2013

Cd1-xCoxS (0 x 0.5) thin films have been deposited by liquid phase chemical bath deposition method on glass substrate from a complex liquid phase formed by equimolar volumes of cadmium sulphate, thiourea and cobalt sulphate. For deposition various preparative parameters, such as speed, temperature, pH, and time were optimized and found to be 70 ± 2 rpm, 56 °C, 11±0.2 and 80 min. respectively. The samples were thin, uniform and tightly adherent with colour changing from orange red to dark chocolate as x was varied from 0 to 0.5. The films were characterized to evaluate the surface morphology, composition and optical measurements. The surface morphologies of these films revealed random orientation of the crystallites of elongated rhomboids with sharp and clear edges having leaf like appearance. The grain size is found to be enhanced continuously from x = 0 to x = 0.1 with fine and more clear grain boundaries and decreased for higher x values. Energy Dispersive X-ray analysis suggests that the deposits are Cd rich. The optical studies were performed on these samples in the range of wavelengths between 500 nm to 1300 nm and yield a high absorption coefficient (α 104-105 cm-1) with a direct type of transitions. The estimated band gap decreased from 2.42 eV to 1.94 eV as x was varied from 0 to 0.5.
Tuning of Optical Properties in La1-xBaxTaON2 Oxynitride through Composition and Particle Size Controls
Authors: Moriga Toshihiro , Shiozaki Katsuya , Fujito Hironori , Kataoka Satoshi , Shinnou Kaoru , Murai Kei Ichiro , Waterhouse Geoffrey I.N. , Metson James B.
Published: September 2013

La1-xBaxTa (O,N)3 oxynitrides were synthesized by ammonolysis of oxide precursors, prepared by a complex polymerization method. The absorption edge of the solid-solutions did not show a blueshift with an increase of x, in spite of the increase of O/N ratio, but rather the edge was redshifted. The substitution of La3+ by Ba2+ was thought to cause the bandgap to be redshifted due to the improved symmetry in (O,N)-Ta-(O,N) linkages in the perovskite structure. Addition of a NaCl flux during the ammonolysis of oxide precursors suppressed agglomeration of primary particles to inhibit the deterioration in the reflectivity after the longer wavelength region of the absorption edge.