bluuebunny/crossref_metadata_2025 huggingface dataset:
A New Approach for Modeling Electro-Osmotic Flow Micro-Cooling Systems
Authors: Taklifi Alireza , Aliabadi Abbas
Published: June 2013

The problem of entropy generation due to heat transfer in an electro-osmotic flow with circular type area section micro-channels for small values of electro-kinetic parameter κα (where κ is the Debye length and a is the radius of the micro-channel) is investigated analytically. The momentum and energy conservation equations in cylindrical coordinates for an electro-osmotic flow are derived in non-dimensional form. The momentum equation is solved and velocity distribution in terms of modified Bessel function of the first kind is obtained. An approximation is used for the Bessel function of first kind. Considering the approximate velocity profile, the energy equation including viscous dissipation effects is solved to obtain the temperature distribution in terms of parametric values of the electro-kinetic parameter and the Brinkman number. A uniform surface heat flux boundary condition is considered. The importance of this investigation is development of an engineering simple method of design for electro-osmotic circular micro-electronic cooling systems and possible optimizations of these kinds of flows with respect to the second-law of thermodynamics through the micro-coolers.
Design of a Total Monitoring System for Air Drilling Process
Authors: Jiang Hao , Wang Han Xang , Lan Wen Jian , Zhang Jian
Published: June 2013

To ensure the normal drilling and well site safety, a monitoring system is necessary in air drilling to monitor the real-time information in total drilling. By using the LMS algorithm and adaptive delayed transversal filter, a mathematical model of underground blasting monitoring is established, and an information monitoring system is also developed based on wireless communication and field bus technologies. The system is characterized by miniaturization, lower cost, convenient operation and transportation, powerful function. The experiment results show that this system can not only provide accurate air drilling parameters and stratum information, but also can monitor the real-time contents of flammable, explosive and toxic gas, which provides a guide for the identify of water-oil-gas layer, supervising drilling and preventing the occurrence of safety accidents in well site.
Cross Shaped Hydroforming Process Comparing of Finite Element Methodand Practical Works
Authors: Kahrizi Mohammad
Published: June 2013

Recently, production of complex parts in car and aircraft industries, gas, water and hydraulic systems by hydroforming process has widely been used. Resistance of these parts, strain and displacement are factors whosedetermination isimportant. Strain and displacement are factors which determine the strength of the part. In this research,we will compare distance between latticed results obtained from theoretical method and practical works.
Shape Optimization of 3D Mechanical Systems Using Metamodels
Authors: Janushevskis Alexander , Melnikovs Anatolijs , Boyko Alexander
Published: June 2013

In this work resource saving technique is used for shape optimization of 3D mechanical objects. According to statistical data, appearance of cracks in the areas of barrel support pads of tank wagons often causes damages to the barrels. The shape optimization of barrel support pads of a tank wagon is implemented and, as result, the concentration of stresses is significantly reduced in the barrel support areas. The optimization technique is based on CAD/CAE, design of experiment, approximation and optimization software packages. The shape of the support pads is defined by NURBS polygon points that serve as design parameters. For reduction of computational resources, FE models of tank wagon are replaced with high-quality metamodels which are based on locally weighted polynomials. The specific recommendations for the shape of the pads are given. As the second object truly spatial tetrapod is considered. The optimal curved shape of the tetrapod for lattice structure is elaborated.
Process Design of Composite Concrete for CNC Machine Tool Bed
Authors: Ding Jiang Min , Zhou Guang Fu , Cheng Hao , Li Xiang
Published: June 2013

Composite concrete consists of silicate reinforced cement concrete inner core and polymer concrete external coating layer, has broad application prospects in the filed of machine tool large component producing. Process design of composite concrete has been done on the basis of tests, a small scale composite concrete machine tool bed model has been built for test, the related simulation and test has been done. The results show that the process of composite concrete is reasonable.
Green Redesign of CKA6150 Numerical Control Lathe
Authors: Ding Jiang Min , Zhang Cong Cong , Liu Yu
Published: June 2013

According to the basic principles of green redesign, CKA6150 CNC lathe is comprehensively analyzed and evaluated by the green degree evaluation model. The results show that the green redesign of the CKA6150 CNC lathe meets all the requirements of the green products. It not only meets the technical requirements of the product's features, performance and life and cost, but also reduces the effect on environment in the process of production, using and recycling.
Insight in the Performance of Scramjet Combustor Based on Orthogonal Experimental Design
Authors: Cheng Wen Qiang , Liu Jing Yuan , Shrestha Rakesh
Published: June 2013

A numerical insight was accomplished to optimize the scramjet combustor configuration based on orthogonal experimental design. Parametric modeling of combustor configurations was performed by the orthogonal array with 13 factors at 3 levels. Numerical simulations were proceeded by k-ε standard turbulence model and eddy-dissipation model in the combustion process. The performance indexes of combustion efficiency, total pressure recovery coefficient and thrust gain coefficient were evaluated. Detailed comparison with the effect of the factors on the performance was also carried out to demonstrate the main factors and determine the optimal configuration. The analysis of the extreme differences of the factors indicates that the main factors affecting combustion efficiency were the length of the wedge, the length depth ratio of the cavity, the depth of the cavity, and the length of the expanding section; The main factors affecting total pressure recovery coefficient are the angle of the primary combustor, the length of the expanding section, and the thickness of the strut; The main factors affecting thrust gain coefficient are the thickness of the strut, the length of the expanding section, and the angle of the secondary combustor. Validation of the optimal configuration is then confirmed that its performance is higher than the rest of the configurations, with the combustion efficiency of 0.915 and the total pressure recovery coefficient of 0.486, which are 31.5% and 65.9% higher than the experimental results, respectively.
Inversion Algorithm Based on the Unscented Kalman Filter for Inverse Heat Conduction Problems
Authors: Chu Pan
Published: June 2013

The inverse heat conduction problems (IHCP) analysis method provides a promising approach for acquiring the thermal physical properties of materials, the boundary conditions and the initial conditions from the known temperature measurement data, where the efficiency of the inversion algorithms plays a crucial role in real applications. In this paper, an inversion model that simultaneously utilizes the process evolution information of the objects to be estimated and the measurement information is proposed. The original IHCP is formulated into a state-space problem, and the unscented Kalman filter (UKF) method is developed for solving the proposed inversion model. The implementation of the proposed method does not require the gradient vector, the Jacobian matrix or the Hessian matrix, and thus the computational complexity is decreased. Numerical simulations are implemented to evaluate the feasibility of the proposed algorithm. For the cases simulated in this paper, satisfactory results are obtained, which indicates that the proposed algorithm is successful in solving the IHCP.
Design, Construction and Evaluation of a Smart Agricultural Harvester
Authors: Ghani M.N.A. , Hudzari R.M. , Wahab F.I.A. , Ramli M.R.H. , Azhar A.W.M.
Published: June 2013

The cost of picking the agriculture product is probably the major factor in determining whether or not there will be an economically successful season for most farmers. Hand harvesting has been costly, whereby, the cost of production constitute up to 80% of the total cost. Jatropha curcas has been considered as a potential feedstock for biodiesel production. Today, Jatropha curcas have been widely planted for harvesting its fruits for biodiesel production. Unfortunately, until now, the cost of jatropha production for biodiesel production is still high, especially labor costs for harvesting. The aim of the present study was to design, construct and evaluate a portable jatropha harvester to reduce dependence on human labor in the harvesting process. This smart harvester was developed by devising a simple crank powered by a hand drill 12 volt (V) that converts the rotary motion to linear motion at a push rod. To evaluate the machine performance, a factorial experiment with randomized complete randomized design (RCBD) in ten replications was conducted, the factors being shaking frequency (180, 250 and 300 rpm) and shaking duration (5, 10 and 15 seconds). To calculate the ratio of fruit detachment force (F) to its weight (W), appropriate measurements were made. Also, the geometric mean diameter of the fruits was determined at different stages of maturity. Analysis of variance (ANOVA) and comparison of means by Duncan's multiple range test (DMRT) showed that the effects of shaking frequency and shaking time on fruit detachment were greatly significant. The number of fruits detached increased by increasing the shaking frequency. Maximum number of fruits detachment was obtained by applying 300 rpm shaking frequency. Also the number of fruits detached increased by increasing the shaking duration.
Engineering Technological in Agriculture Research and Education
Authors: Hudzari R.M. , Noorman M.M. , Asimi M.N.N. , Atar M.A.M. , Nashriyah M.
Published: June 2013

Engineering technological especially on automation and mechanization in agricultural and plantation industry is still new and still under research and development. The application of computer, mechatronics and machines for agricultural production has been one of the outstanding developments in Malaysian agriculture. This paper describes on the recent research at Malaysian public university on the uses of computer and electronics towards machines for the agricultural operations. It has been generally agreed that industrial robotics do not provide sufficient information related to the bioproduction field, although some fundamental theories and technologies were applicable to the bioproduction machine. Agricultural products are diversified and complicated, the environment around the objects changes from time to time, and the machine mechanism should adapt to physical properties and cultivation methods of the biological objects. These are some of the considerations that agricultural mechanization needs to address. Current trend in agriculture is integration with biotechnology application, the demand of which may increase in conjunction with the land capabilities by variety humanity activities. Although adoption of one agriculture activity per house area is a viable strategy in the framework of food security, as in a general, an agricultural production is labour intensive. The agricultural landscape has seen an increase in adoption of modern technologies, be it in small scales, including those in the agro-based manufacturing sector. This, to some extent, has increased the productivity and at the same time decreased the labour dependency. In conclusion, studies on electronic and computer-assisted devices leading to automation for application in agriculture had to be perpetually carried out.
Further Discussion on Population Growth Models by Stochastic Differential Equations
Authors: Yang Fei , Zhang Liang Di , Shen Jing Fang
Published: June 2013

Malthusian population growth model is not applicable to the real world situation in most cases, since the simplifying assumptions are too ideal. In this article, we will generalize the classic population growth models by Stochastic differential equations, and get the extended models appealed to the real world better as well. When modeling the environmental perturbation by white noise process, we get an advanced model .
Research on Circuit Design for Speed Adjusting Hardware of Brushless DC Motor Based on the Two-Dimensional Fuzzy Controller
Authors: Li Chun Feng , Li Ke Ming , Zhang Xiang
Published: June 2013

The essay first establishes the general design for intelligent rotary speed system of the brushless DC motors, then based on the general design scheme, two-dimensional fuzzy controller, adaptive current adjustor and mainly used hardware circuits are designed. The mainly used hardware circuit design includes the circuit design of current detecting circuit, voltage detecting circuit, high-speed optocoupler, motor driver circuit, zero-crossing comparator circuit, etc. At last the designed controller and hardware circuits are tested to achieve optimum effects for rotary speed control through validation of experimental devices.
Analysis and Computation of Taper Leaf Spring Based on FE Contact Analysis
Authors: Zhou Shui Ting , Huang Hong Wu , Ouyang Lian Ge , Xiang Tie Ming
Published: June 2013

The traditional analysis of the leaf spring just implemented a simplified mechanical model without considering the friction between the leaf springs. In order to do better in designing the leaf spring with variable cross sections, this paper firstly constructed the parameterized model of the taper leaf spring, and then applied the contact theory to add contact element to simulate the friction between the leaf springs in the FE analysis. After these steps, the assembly of the prestressed, the stiffness, the damping ratio and the fatigue life of the leaf spring could be achieved. It shows that the analysis and computation of taper leaf spring based on FE contact analysis can reflect the actual situation more comprehensively after comparing the results with those calculated with traditional way and those recommended by industry .
Dielectric Spectrum of CaCu3Ti4012 from the Giant Permittivity to its Negative Values
Authors: Kabirov Yurii , Gavrilyachenko Victor , Panchenko Evgeni , Milov Evgeni , Klenushkin Anatoly
Published: June 2013

The dielectric spectrum of CaCu3Ti4O12 samples prepared by traditional "one step" ceramic technology is analyzed. It is established that the characteristic Debye-type dispersion with an activation energy 0, 075 eV manifests in the high-frequency range (f ~ 106 Hz). In the low-frequency region (f< 102 Hz) a transition from giant permittivity values to its negative values is detected in some samples. Conditions for such transition are discussed.
Modified Differential Evolution for Tension/Compression String Design Problem
Authors: Jian Li , Yin Cheng Jiu , Hirokawa Sachio , Tabata Yoshiyuki
Published: June 2013

This paper introduces a modified differential evoluiton method to solve the tension/compression string design problem. The modification is derived from mechanisms of social networks. In the proposed method, each individual will be attracted by the knowed best individual following the connectivity between each other. The connectivity is calculated based on the difference of the variables in each vector. The individuals with high connectivity tend to perform local search while those with poor connectivity tend to perform global search instead. The approach was employed for a tension/compression string design problem and by comparisons with the other evolutionary algorithms, the proposed method privided better resutls.
Rigid Body Motion Conversion due to Collision
Authors: Polukoshko Svetlana
Published: June 2013

The impact phenomenon may be used for task-oriented changing of rigid body motion. When moving body encounters with some obstacle all parameters of motion are changing as a result of impact and trajectory and type of motion are also changing. In this work the conversion of translatory motion of prismatic rigid body into plane or rotation and conversion of plane motion of cylindrical body due to impact are considered. The conditions of conversion of one type of motion into another and parameters post-impact motion are studied. Problems are solved in the framework of rigid body motion, using rigid body impact theory. Studying of such phenomena is important for location of parts on industrial conveyors, feeders, etc.
Optimal Control of the Rotor System Motion
Authors: Toleukhan Imankul
Published: June 2013

Among the problems of the rotor machines dynamics the special attention is given to the problems of creation of the automatic balancing devices (ABD) in form of a hollow rotor, filled by a liquid, and the liquid-solidbody ABD. The theoretical and experimental works on research of the ABD on the base of a hollow rotor filled partially with a liquid and of the liquid-solidbody ABD are not enough. Therefore development of the methods of research of dynamics of the rotor machines with the ABD and such machines designs is an actual, new and perspective problem. In the present work the mathematical model of the rotor system with the ABD taking into account of the engine characteristics is offered. Lets consider the model of the rotor with electric drive with one disk, set up at the flexible shaft without skew. The shaft is lean on two bearings (fig. 1).
Parameters and Applications of Noise-Gates
Authors: Jin Yuan
Published: June 2013

Noise gates are common equipments in audio processing which can attenuate all kinds of the noise effectively and have some applications in making special effects. This paper introduced the six parameters in noise gates also: attack time, release time, ratio, range, hold time and threshold.
Biomolecule-Assisted Synthesis of CoS Microclusters with Well-Aligned Nanoflakes
Authors: Wang Min , Wang Zhu Qing , Chen You Cun , Min Yu Lin
Published: June 2013

In this work, CoS flowerlike microclusters with well-aligned nanoflakes were synthesized using a facile solution-phase biomolecule-assisted approach in the presence of L-cysteine (an ordinary and cheap amino acid), which turned out to serve as both the S source and the directing molecule in the formation of cobalt sulfide nanostructures. The morphology, structure, and phase composition of the as-prepared CoS products were characterized using various techniques. The formation mechanism for the cobalt sulfide flowerlike assemblies with well-arranged nanoflakes was also discussed. This facile and solution-phase biomolecule-assisted method can be potentially extended to the preparation of other metal chalcogenides including NiS, PbS, MnS, FeS and CuS nanostructures.
Detection of the Network Intrusion under IPV6
Authors: Shen Ying , Zhu Wei Hua
Published: June 2013

This paper introduces an intrusion detection system which uses IPV6 principle to work out a new intrusion mode so that the intrusion behaviors could be identified. This system adopts the intrusion features to analyze the consistency and deviations which is different from the common methodology which utilizes the historic data for this purposes. A Snort system is proposed to test the Network Intrusion Detection System (NIDS) that is based on IPV6.
A New Type of Function Projective Synchronization of Nonautonomous Chaotic System
Authors: Zhao Xiao Shan , Li Zhen Bo , Liu Fang Fang
Published: June 2013

The function projective synchronization of nonautonomous chaotic system with a new type of scaling function is investigated. The scaling function factor discussed in this paper is a new kind of function which contains the state variable. Obviously, this kind of scaling function is complicated than former ones. Based on modified active control, the general method of this synchronization is proposed. In numerical simulation, the heavy symmetric gyroscope system is taken as the instance to demonstrate the validity of the controller and the feasibility of the proposed synchronization.
The Geomagnetic Chart's Drawing Based on Normal Kriging Method
Authors: Zhang Xiao Jun , Kang Chong , Zhao Yi Chao , Liu Yu Yuan , Fan Li Ming , Lei Yu
Published: June 2013

In geophysical prospecting area, the issue how to obtain high precision and low scale geomagnetic charts has been a research focus all the times. In this article, the application based on normal Kriging method can be interpolation proved. Through interpolation and evaluation for the original geomagnetic grid based on Kriging algorithm, the new geomagnetic grid can be estimated by the way of data's transitivity. After that, the geomagnetic chart with high precision and low scale can finally be drawn. At the same time, its feasibility upon this sort of method has been verified.
Fabrication of Nanoporous Copper Electrodes for Electrocatalytic Oxidation of Methanol
Authors: Zhang Wen , Li Li Jun , Jia Gan , Li Jing , Cao Zhen Zhu , Wang Hong , Li Cai Hong , Liu Yu Chen , Gao Yan Fang , Liu Jin Rong
Published: June 2013

Nanoporous copper film (NPCF) electrode was fabricated by applying multicyclic potential scans on a polished copper electrode in an electrolyte composed of ZnCl2 and benzyl alcohol. Scanning electron microscopy (SEM), Energy-dispersive spectroscopy (EDS), Cyclic voltammetry (CV) and chronoamperometric (CA) were employed to characterize copper chloride modified copper electrode. The Eonset on the copper chloride modified nanoporous copper electrode was 0.5038 V, which was 46 mV lower than that on copper chloride modified copper electrode; Epeak on the copper chloride modified nanoporous copper electrode was 0.9072 V, 814 mV lower than copper chloride modified copper electrode; the jpeak was 15.4 mA cm-2 higher than that on copper chloride modified copper electrode (9.8 mA cm-2) in 0.1 NaOH solution in the range of 0 to 1.25 V( vs.Ag/AgCl) at a scan rate of 10mVs-1.
Analytic Solution for Microscale Poiseuille Flow Based on Super-Burnett Equations
Authors: Song Cheng Qian , Yin Xie Yuan , Qin Feng Hua
Published: June 2013

The previous studies show that the transverse distribution of pressure and temperature in microscale Poiseuille flow cannot be predicted by Navier-Stokes equation with the slip boundary condition. In this paper, we analyzed the planar microchannel force-driven Poiseuille flow by high order continuum model. The super-Burnett constitutive relations were used and the nonlinear ordinary differential Equations of higher-orders were obtained by the hypothesis of parallel flow. With a perturbations theory, we linearized the equations and obtained the analytic solutions. The results show that the solutions can capture the temperature dip which is the same as the DSMC result. However, we also find that the temperature profile near the wall does always not match with the DSMC result. Especially, the difference in the qualitative exists when the Knudsen number is large enough. The non-equilibrium effect near the wall such as Knudsen layer can not be described entirely by continuous model even with high order constitutive relations and this confines the extension of the continuous model such as super-Burnett one.
The Realization of the Source Address Validation Improvement (SAVI) in IPV6 Campus Network
Authors: Lou Ya Fang , Yuan Zhi Jun
Published: June 2013

With the rapidly developing of Internet, the problem of network security is getting more and more serious gradually. Most of the root cause is in connection with illegal host access. The source address validation improvement (SAVI) is a technology to realize the source address validation in the access network. Illegal access of the user can be safe and effective control from the access layer by SAVI. SAVI has positive significance in the use of the ipv6 campus network.
A Floorplanning Algorithm with Minimum Total Length Wires
Authors: Yang Hai Yan , Zhao Hua An
Published: June 2013

A floorplan is employed to represent the placement of modules in VLSI design. Floorplanning is a key step in the design of VLSI systems because it provides the first estimates of performance and cost including placement and routing. In this paper, we show an algorithm1 for initial global routing by the single-sequence (SS). The aim of our algorithm is to get a minimum chip area and the shortest total length of wires where the longest (critical) wire in every net is reduced to a minimum. The experimental results show that the design of placement and routing in floorplanning can be considered simultaneously by our algorithm, the efficiency of automatic layout in VLSI can be raised.
Magneto-Elastic and Mechanical Properties of Fe81-xNixGa19/Si(100) and Fe81-yNiyGa19/Glass Films
Authors: Jen Shien Uang , Liu Chi Ching , Chuang Chen Yi
Published: June 2013

Two series of Fe81-xNixGa19/Si (100) and Fe81-yNiyGa19/glass films, where x or y = 0 26at.%Ni, were made by the magnetron sputtering method. We have performed three kinds of experiments on these films: the saturation magnetostriction (λS); [ii] the nanoindentation; and [iii] magnetic hysteresis-loop measurements. The main findings of this study are summarized below:[ λS reachesa local maximum, when x = 22 and [B] the Youngs modulus, Ef, of the Fe-Ni-Ga film deposited on a Si (100) substrate is larger than that (the same film) deposited on a glass substrate. We conclude thatthe Fe59Ni22Ga19 film could beemployed in a low-field and low-costnano-magnetic switching device.
Quantitative Analysis of Overlapping X-Ray Fluorescence Spectra for Ni, Cu, Zn in Soil by Orthogonal Signal Correction and Partial Least Squares Algorithm
Authors: Zhang Wei , Zhang Yu Jun , Chen Dong , Zhang Rong , Yu Xiao Ya , Gao Yan Wei , Wang Chun Long , Liu Jin , Zhao Nan Jing , Liu Wen Qing
Published: June 2013

In this paper, the combination method viz. orthogonal signal correction (OSC) and partial least squares (PLS) algorithm is applied to analyze overlapping X-ray fluorescence spectra. The experiment is carried out by using 16 prepared soil samples which are divided into 4 groups according to their different combinations. Prediction results of these 4 groups are respectively calculated using OSC and PLS algorithm. Influence factors of the model are discussed according to specific samples. The experiment result shows that correction factor of OSC can be increased more than one and OSC-PLS algorithm can effectively eliminate the influence of overlapping XRF spectra and improve the predictive accuracy.
Photothermal Response in Semiconducting Microcantilevers Produced by Laser Excitation
Authors: Song Ya Qin , Yang Xiao Gang
Published: June 2013

The elastic vibration of semiconducting microcantilever, which was excited with a frequency-modulated pump laser, was optically detected use another probe beam. The photothermal signals were measurement near the resonant frequency. The changes of vibration amplitude and phase with the change of modulation frequency were obtained for a set of different sized microcantilevers. The results showed that the experimental results had a good agreement with the theoretical ones.
Interfacial Crack Effect on Thermal Mechanical Behavior of Solder Bump for Flip-Chip Package: A Numerical Analysis
Authors: Mu Yun Peng , Jiang Wu Gui , Zhao Hong Ping
Published: June 2013

In this study, the effects of interfacial crack on thermal mechanical behavior of solder bump only induced by current for flip-chip package are investigated by numerical analysis. In the numerical model, the properties of solder bump are dependent on temperature. First, the crack length effects on thermal mechanical behavior of solder bump is examined, with the parameters of temperature, von Mises stress, shear stress and plastic strain. Second, the influence of current density is also numerically examined. It is demonstrated that the increasing current density and the crack length will induce more plastic strain in the solder bump. This study may be helpful for the fabricated technique of the die-solder bump-substrate system.
Quantitative Determination of Arsenate in Dried Shrimp by Spectrophotometric Measurement of its Heteropoly Blue
Authors: Suitcharit Charuwan
Published: June 2013

A cost-effective and sensitive spectrophotometric method for the determination of arsenate in dried shrimp has been developed using molybdenum blue as a chromogenic reagent. The method is based on arsenate conversion to arsenomolybdate heteropoly blue having an absorbance maximum at 870 nm. The effects of pH, time, temperature and light on its complex formation were investigated. The optimal complex formation condition at pH 4 in 90 min at 15+1°C was obtained and the blue color was favorable developed in daylight. The proposed method has been successfully applied for the determination of arsenate in samples with the addition of DTPA to eliminate the interferences resulting in increased selectivity. The standard addition calibration graph was constructed with the linear range extended to 40 μgL-1 (r2 = 0.9987). The detection limit (S/N = 3) of 3.21 μgL-1, and the precision of 3.13% (RSD) were obtained. The method has good recovery of 95% for the determination of arsenate. The amounts of arsenate in dried shrimp samples compared with those obtained from ICP-OES were shown to be in good agreement (r = 0.998).
Study on Force Sensor Based on Gas Pellicle Loading and Pressure Differentials Enlargement
Authors: Sun Xu Guang , Wang Chang Hai , Qiao Kai , Feng Cheng Long , Zhao Zhen
Published: June 2013

In this paper, a new force and force location sensor based on the principle of gas pellicle loading and pressure differentials enlargement is designed, and the structure, the principle and the analysis of flow field studied by simulation software are also introduced respectively. The sensor is widely used in solving the problem of snatching at flexible or crisp workpiece and analyzing the force position and the accurate force.
Study on Motion Equation of Acceleration Sensor with Magnetic Fluid
Authors: Hao Rui Can , He Xin Zhi , Gong Wen , Liu Hua Gang
Published: June 2013

Acceleration sensor with magnetic fluid is a novel application of buoyancy principle of magnetic fluid. The model of the sensor was established in the paper. To improve the design of the acceleration sensor with magnetic fluid, motion equation of the sensor was deduced, which is the second-order vibration equation. From the equation, the damping coefficient is determined by magnetic viscosity coefficient of the liquid and the sensor structural parameters.
The Design of the Dynamic Detection System for the Screw’s Lead Precision Testing
Authors: Fan Xian Guang , Wang Xin , Lu Yang , Li Fan , Zuo Yong
Published: June 2013

For the screw’s lead precision dynamic testing needs, the hardware of the design includes two parts: the motion control card and the data acquisition card. We use the motion control card (GT200-SV) as the circular grating and long grating motor controller, and the data acquisition card is consist of FPGA and DSP. FPGA is the core device to realize the synchronous dynamic grating signal and inductive signal data acquisition and DSP is used to realize the function of decoding and communicating to PC by the USB bus protocol. Finally data are evaluated by the software on the computer. The acquisition speed of Screw’s lead precision dynamic detection system can reach 20 KHZ, and it has been successfully applied to a certain type of screw’s lead precision dynamic detection device in a company.
The Liquid Surface Pressure Control System for Low Pressure Die Casting Based on Fuzzy PID
Authors: Lin Hai Feng , Du Liu Qing , Xiong Li Ping
Published: June 2013

The Liquid Surface Pressure Control is the key factor for the guarantee of Low Pressure Die Casting Quality. Regarding to the disadvantages of conventional PID Control such as pressure fluctuation, poor repeatability of the pressure curve, and so on, we propose Liquid Surface Pressure Control System (LSPCS) based on Fuzzy Adaptive PID. Design method of Fuzzy PID Controller has been discussed, and the realization methods of the hardware and software in this system are developed. This proposed system has a good performance in practice.
The Moving Target Detection under Complicated Background Base on BP Neural Networks
Authors: Feng Xiang Dong
Published: June 2013

This paper aims at utilizing BP neural network and improved BP neural network in the extraction of moving targets from the static background and the motor background. Across introduces of L_M Optimization method to improve the BP neural network, combination the difference between the consecutive frames or difference from the background for the extraction of moving targets. The paper uses one types of image segmentation improved BP neural network for extraction of moving targets from the static background. We will obtain the same moved targets with the extraction of moving targets from the static background and the motor background. After experimental verification, this method on different objects in the context of the same detection ability is better.
Experimental Research of New Rotor with Variable Clearance in Mixing the Short Fiber-Rubber Composite
Authors: Liu Cai Jun
Published: June 2013

The ideal effects of mixing the short fiber-rubber composite can not be reached under current conditions. This paper built the physical model for the short fiber mixes and disperses in rubber through studying the mixing mechanism of the short fiber-rubber composite. The new 6-wing synchronous rotor was designed according to the requirement of material mixing mechanism. The mixing requirement of the ordinary material and the reasonable length-diameter ratio of the short fiber could be met through changing the clearance gap between the rotor edge peak and mixer room. Finally, verify the theory through experimental study.
The Summary of Tunnel Boring Machine Control Based on the Neural Network
Authors: Liu Jin Zhi , Lin Jun , Ma Li Ming , Li Shen Shan
Published: June 2013

Conventional control of tunnel boring machine can't achieve the ideal effect because of the complexity of its work process, uncertainty of construction environment. In order to solve the question, the intelligent control is expected. The neural network control has many characteristics such as self-adaption, self-organization, and can modify the corresponding parameters by learning about external knowledge, so it becomes research focus of tunnel boring machine control system in recent years. In this paper the advantage and disadvantage of several kinds of neural network used in the tunnel boring machine control are introduced, the development trends of tunnel boring machine control is predicted.
Vision Servo System for High-Voltage-Live-Working Robot
Authors: Wang Zhen Li , Lu Shou Yin , Li Jian
Published: June 2013

This paper presents a vision servo system for high-voltage-live-working robot, which consists of image acquisition subsystem, image processing subsystem and robot control subsystem. It uses binocular stereo camera which mounted on the hand of robot to get the image of the working scene, and then uses binocular stereo vision algorithms together with target tracking algorithm to get the 3-Dimensions information of the power equipment. The robot control subsystem receives the 3-Dimensions information, and then guide the robot moving to the target location to implement the high-voltage-work. The proposed system can implement the high-voltage-work without Human involvement and improve works level of automation and efficiency.
Research on Precision Measurement of Machine Part Based on Radiometric Calibration
Authors: Li Xiang Xu , Bi De Xue
Published: June 2013

In this paper, a precision measurement method of machine part based on radiometric calibration was proposed. According to radiometric calibration, the response function of our camera's CCD sensor was obtained, and the non-linear mapping relations between image gray value and the radiant energy of machine part was established. Based on this, the real size of machine part in image was restored. The experiments showed that this method could effectively improve the measurement accuracy, and it would be of great importance in non-contact measurement field of machine part.
Anti-Glare Device for Car Based on Single Chip Microcomputer
Authors: Li Hai Xia
Published: June 2013

Because the car headlamp light intensity is too large and it leads to accidents, This paper is based on the initiative to reduce the light intensity of their vehicles according headlights glare or close the high beam and open the lamp method, to achieve the purpose of the glare. The system is AT89C51 microcontroller as the core control, use of photodiode sensor to induction opposite the car headlights light intensity , when opposite car headlights light intensity up to a certain value, photodiode get a signal to the microcontroller ,and then microcontroller sends a signal, to control buzzer sound or not. When the buzzer sounded, using DAC0832 chip to control the brightness of the light emitting diode or control the light on and off and low beam enabled. When enabled for dipped beam, has been more than the antiglare range; after the scope enabled high beam, in order to achieve the anti-dazzle cycle. Through practice, the system has reached the anti-dazzle purpose and has practical value .
Finite Element Analysis of the Mechanical Structure in Portable Exoskeleton Based on DOF Coupling
Authors: Liu Fang , Cheng Wen Ming , Zhou Yi
Published: June 2013

Since the posture of portable exoskeleton is consistent with human motion and each joint degree of freedom is same, on the basis of DOF coupling in portable exoskeleton, the finite element analysis of the mechanical structure in portable exoskeleton has been calculated. According to the anthropomorphic mechanism design method, the universal joint structure has been used to meet the requirements of degrees of freedom in the mechanical structure of the exoskeleton; using the Hydraulic cylinder to simulate the contraction or stretch of human muscle, and the three-dimensional model of the exoskeleton mechanical systems has been created with the Solidworks software; selecting Human CAD software and setting the parameters of the movement of the human body model, the variations of the various joints can be obtained; using the Parasolid as the standard format for data transfer between the two software Solidworks and ANSYS, the finite element analysis model was established, and according to the principle of coupling, the three translational DOF and two rotating DOF was coupled, besides through both legs vertical standing, one knee kneeling, and one leg vertical standing three conditions, the exoskeleton strength was analyzed. The simulation results show that under the three conditions, a concentrated stress all has been found in the exoskeleton structure, besides the concentrated stresses all have been obtained in the cross-section changing site or the junction of the two components, which stress values exceeded the allowable stress values of the aluminum alloy material, so the suggestions for improvement of the structure are put forward in the article; at the same time, the simulation results provide a numerical basis for the optimization of the portable exoskeleton structure.
Hardware Design of a Planar Platform for Naro-CMM
Authors: Sun Hui Zhi
Published: June 2013

Nanometer three Coordinate Measuring Machine (Naro-CMM) has got fast development especially in the advancement of modern technology. Platform is an important part of the Naro-CMM, paper puts forward a new way to drive platform. “Planar” mode is adopted, and the power module is designed based on L6234PD, the experimental results express that the positioning accuracy of the platform reaches nanometer accuracy. So the drive method satisfied the demand of this platform’s movement.
Modeling and Simulation Based on AMESim and Simulink Electric Hydraulic Power Steering System
Authors: Fang Gui Hua , Zheng Wen Shuai , Zhang Li Bo
Published: June 2013

This article using AMESim and Simulink software co-simulation technology and appropriate software to establish the simulation model of the key components of the steering system, it is found the factor which affect vehicle handling and stability of steering system in the structure by analyzing the impact of various parameters on the car steering system. It is to verify the feasibility of the model and study how steering system of all kinds of main factor to influence the vehicle steering stability through Simulink and AMESim software co-simulation results cf vehicle steering stability GB experiments.
Research and Practice of the Solution for the Linearity Error Using AGC
Authors: Liu Hai Jiang , Wang Hong Yan
Published: June 2013

For the dispersion problem of the widespread sensors in the R & D process of measuring instruments, this paper proposes a practical method for the automatic calibration of linearity error. Meanwhile, it takes the pressure sensor as an example to describe different calibration methods such as using the hardware, the combination of software and hardware, using the software.
The Integrated Simulation on Power Source of Hydraulic Hybrid Vehicle
Authors: Li Xiang Sheng , Chen Dou , Li Xiao
Published: June 2013

In order to improve the fuel economy and to reduce emission of the hybrid vehicle, according to between the power flow distribution and energy utilization with two or more than two of energy flow of the hybrid vehicle, was put forward to use adaptive fuzzy control law and LMS (Least Means Squares) to integrated simulate for power source. Pinciple of control algorithm was introduced, and control rules have been setup. Through the case to verify, the simulation results show that the control method is reliable and effective, and the disturbance input of the same torque, fluctuation of the engine rotation is from the 15% by traditional method down to 1.2%~3% and the operation area of the power source is mainly located in the economic area.
Fabrication of Bioceramic Scaffolds for Tissue Engineering Using Additive Manufacturing Technology
Authors: Liu Fwu Hsing , Lin Wen Hsueng , Lee Ruey Tsung , Wang Hsiu Ping , Hsu Hsiu Ling
Published: June 2013

In this paper, the hydroxyapatite (HA) based bioceramic materials were used in a rapid prototyping (RP) system to fabrication bioceramic bone scaffold for tissue engineering (TE) using an additive manufacturing (AM) technology. When the bioceramic slurry is sintered via the processing parameters of an 85 mm/s laser scanning speed, 24.5 W of laser power, 10 kHz of scanning frequency, and 2500 Cp of slurry viscosity, a porous bone scaffold can be fabricated under a lower laser power energy. Results indicate that the bending strength of the scaffold was 14.2 MPa, which could be improved by heat-treatment at 1200 °C for 2 hour. MTT method and SEM observations confirmed that the fabricated bone scaffolds possess suitable biocompatibility and mechanical properties, allowing smooth adhesion and proliferation of osteoblast-like cells. Therefore, the fabricated bone scaffolds have great potential for development in tissue engineering.
A Study on Modeling the Temperature of Vehicle Transmission Device
Authors: Bi Xiao Ping , Li Yi Jun , Gao Yang , Ma Ning
Published: June 2013

In order to study the components temperature and the transmission oil temperature that flowing through the components of vehicle transmission device, based on the basic theory of heat transfer, this paper establishes heat production model, component temperature model and transmission oil temperature model of the vehicle transmission, calculates the models coupling and iterative, compares the calculating results with testing results. The results show that the maximum relative error of transmission temperature between the calculating results and the testing results is less than 10%.
Application Research on the Small Wind Generator Based on the Motor Winding Embedding Principle
Authors: Wei Zeng Ju , Yang Tian Ming
Published: June 2013

This article is based on a company which needs to change the line of production, used the motor winding embedding principle by author, adopt description of new coil form, as well as the winding operation process, on small wind generators to electric bicycle motor research to be carried out; after improvement become waste to treasure that have a good results.
Fabrication of Porous TiO2 Electrodes from P25 Powder by Chemical Technique for Dye-Sensitized Solar Cells
Authors: Yan Yuan , Wang Jin Zhong , Chang Quan Hong
Published: June 2013

We presented a novel chemical technique to prepare TiO2 screen-printing from commercially available P25 powder to fabricate high performance and transparent porous TiO2 electrodes for dye-sensitized solar cells (DSCs). In this new method, acetic acid was modified on TiO2 surface as dispersant to overcome the aggregation problem and achieve efficient dispersion of P25 powder in water; The modified TiO2 powder was configured into viscous paste by flocculating reaction with hydrochloric acid. The porous transparent films over 12μm thickness without cracking and peeling-off were fabricated on FTO substrates. A remarkably conversion efficiency of 8.1% was achieved.
Automatic Sorting Machine for Cylinder Length
Authors: Ren Xian Ke , Li Dong Ming , Zhang Hang , Cui Yun Xian
Published: June 2013

In order to resolve the problem that is low precision, slow speed and time consuming, which come out when selecting by artificial. This paper developed an automatic selection machine of cylinder length, which use advanced PLC controller to take the place of conventional mechanical control type. Moreover, it employs synchronous controllable automatic loading and automatic material distribution mechanism, greatly improved control precision and efficiency. Save production cost due to use contacting sensors. Rotary disk type and feeding integral type design pattern reduce the complex of mechanism, and selection speed can reach 120-200 every minute, it realizes the purpose of accuracy and fast.
CFD Simulation Research for Laminar Flow Cooling during Hot Strip Mills
Authors: Sun Xu Guang , Wang Chang Hai , Feng Cheng Long , Qiao Kai
Published: June 2013

This paper presents a computational fluid dynamics (CFD) simulation research for the interior flow field of laminar cooling during hot strip mills. Based on analysis of the flow field, the interior model of cooling is designed precisely, and the result establishes foundation for improving the control precision of cooling control system.
Characteristics of Vehicle Tire Tread Pattern and its Application in Forensic Science
Authors: Jin Yi
Published: June 2013

Vehicle tire tread pattern is an important part of vehicle tire and also an important object concerned by the police workers who want to deduce or identify the suspected vehicle tire through the tire pattern impression left on the crime scene, which is routinely reflected by tire pattern impression on the surface tire rolled through. In this paper, the characteristics of vehicle tire pattern and its application in forensic science was analyzed and summarized in accordance with cases, based on the analysis of the process of production and using. The research indicated that the tire pattern not only has type characteristics corresponding to vehicle type, but also may have some new individual characteristics in the process of production and using in special condition. The morphological characteristics of tire pattern can be reflected more or less by the tire impression which left on road, clothes or body skin. With the development of trace extraction and enhancement technology, the morphological characteristics of tire pattern in tire impression will be used to deduce vehicle type or identify the suspected vehicle tire, which will play an important role in forensic evidence.
CNC Milling Tool of Choice to Explore
Authors: Zhang Da Lin , Guo Ji Lin , Zhou Tian Rui
Published: June 2013

The CNC tool selection is an important factor affecting the CNC machining efficiency and parts processing quality. In this paper, based on the analysis of the CNC milling cutter type, structure, diameter, angle, economy and other factors, a reasonable strategy to select the tool.