bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Measurement Error Test Method of On-Line Insulation Monitoring Device for Capacitive Equipment
Authors: Yang Yuan
Published: August 2013

The dielectric characteristic parameter, such as capacitance value, the dielectric loss tangent and leakage current values will change when insulation degradation occurs in capacitive equipment, thus the insulation on-line monitoring devices were used for the insulation state monitoring. At present, the monitoring mode, functional requirements, stability requirement, reliability requirement, and the access security impact has not been fully unified among different manufacturers. For the purpose of standardization of the design, production, testing and operation management of the device, studies were carried out in field of technical parameters and test methodology. Considering the structure and working principle of this kind device, key technical parameters of functional and technical requirements were put forward, and the measurement error performance testing method, as well as the detection circuit was also given under the laboratory conditions.
Some Opportunities of Circuit Test Diagnosis
Authors: Kinsht Nikolay , Petrun’ko Natalia
Published: August 2013

Some problems of test diagnosing of electric circuit on the basis of application of a matrix of nodal immitance are considered. Analytical solutions of a task when the part of required parameters is known are received. Examples are showed.
Agricultural Machinery Operation Posture Rapid Detection Intelligent Sensor Calibration Method Based on RBF Neural Network
Authors: Zhang Nan Feng , Yang Jing Feng , Xue Yue Ju , Li Zhong , Huang Xiao Lin
Published: August 2013

Based on agricultural machinery body posture detection parameters and wheels gesture detection parameters collected by gyro inertial measurement unit, an agricultural machinery operation posture rapid detection method is proposed in this paper. The test results calibrated by RBF neural network show that, the test results of the method are accurate and available, and the method is effective and available for real-time body and wheel status data to further understand the agricultural machinery.
Agricultural Machinery Operation Posture Rapid Detection Method Based on Intelligent Sensor
Authors: Zhang Nan Feng , Yang Jing Feng , Xue Yue Ju , Li Zhong , Huang Xiao Lin
Published: August 2013

Based on agricultural machinery body posture detection parameters and wheels gesture detection parameters collected by gyro inertial measurement unit, an agricultural machinery operation posture rapid detection method is proposed in this paper. The test results show that, the test results of the method are accurate and available, and the method is effective and available for real-time body and wheel status data to further understand the agricultural machinery.
Research of Numberical Solution on Kinetic and Tribological Coupled Model of Piston Systems
Authors: Zhou Xiao Rong , Zhang Yu Ling , Cai Gan Wei
Published: August 2013

This paper establishs a coupled model on kinetic and tribological of cylinder liner-piston-piston ring system and takes the cylinder liner-piston system as an automatic control system based on the finite difference method and overrelaxation iteration method; the numerical solutions of the model is put forward and designed the overall the calculation process of coupling model, providing theoretical basis for further analyzing the piston system dynamic performance.
Research on In-Planestatic Mechanical Performance of Honeycomb Paperboard Based on Virtual Simulation
Authors: Mu Xin Ni , Sun Cheng , Huang Li Qiang , Ma Yong Sheng
Published: August 2013

Simulation analysis was made with the factors of the base paper and the structure of honeycomb paperboard by means of ANSYS after abstract and simplify honeycomb paperboard model. The results show thatfactors of quantification of surface paper, cell length, paperboard thickness and aperture ratio all have a great effect on the mechanics performance of honeycomb paperboard. With the increase of quantification of surface paper, longitudinal and transverse platform stress both rise gradually. With the increase of cell length and paperboard thickness, the platform stress and peak stress under different compression direction of honeycomb paperboard all decrease, providing a reference for the study of numerical simulation and mechanical property tests.
Microstructure and Hardness of Fe-Based Coating by Plasma Cladding
Authors: Wang Li Mei , Liu Jun Bo , Jiang Jun Sheng
Published: August 2013

Plasma cladding experiments were carried out on Q235 steel with Fe-Cr-Ti-C powder. Microstructure and micro-hardness of the composite coatings were investigated by means of optical microscopy (OM), scanning electron microscopy (SEM) and electron probe micro-analyzer (EPMA) and micro-hardness tester. The results indicated that the grains of the cladding coatings with Ti are much finer than that of the Fe-based cladding coating without Ti. Compared with the cladding coatings without Ti, there are more shingle crystals in the cladding coatings with Ti and the hard phase (Cr,Fe)7C3of the eutectic in the coatings increase gradually. The average hardness value of the four cladding coatings is respectively 486.5 HV0.1and 558.8 HV0.1.
Powder Injection Molding of 20-40 Vol.% Silicon Carbide Particulate-Reinforced Aluminum Composites
Authors: Patcharawit Tapany , Tongkhon Pradya , Wiangsamut Aran , Auisungnoen Prinnapus , Chuankrerkkul Nutthita
Published: August 2013

Effects of 20-40 vol.% SiCp additions on microstructure and hardness of aluminum composites have been investigated in this research. The composites were produced via powder injection molding at 170°C followed by solvent debinding and sintering at 700-820°C. After sintering, composite microstructures and properties were influenced by SiCp additions and sintering temperatures. Higher SiCp additions required higher effective sintering temperatures. Furthermore, increasing SiCp content promoted SiCp agglomeration along aluminum grain boundaries and caused SiCp pull-out during metallurgical preparation. This resulted in higher porosity observed from the sintered microstructures. Variation in macro Vickers hardness values were obtained due to opposing effects of increasing contents of SiCp and porosity. Optimum hardness values were obtained when sintering was carried out at 740, 780 and 800°C for 20, 30 and 40 vol.% SiCp additions respectively.
Pipeline Reeling
Authors: Albarody Thar M. Badri , Zahiraniza Mustaffa Bt , Badri Taufiq Mohammed
Published: August 2013

The reel laying offshore pipeline installation method is known to be easier and cost effective, but the method may induce some plastic deformation into the pipe, thus affecting the strength and ductility of the pipe material. However, the design and modeling of applied bending loads to the pipe during spooling of (initially straight) or laying of (initially bent) pipe has become a great challenge and are addressed in this study,sifting parametrically pipelines stiffness. It is demonstrated that rigid pipeline requires higher spooling loads, but indeed rigidity improves the laying effort without the need of applying tension, thus making it more tractable during the straighteningstage. The paper also emphasizes on pipe free-end deformations and offset of bending, which extends the findings of previous works on spooling or laying control.
Application of Least Squares Algorithm on Maps Building for Mobile Robot
Authors: Guo Tong Ying , Liu Wei , Du Zhen Jun , Wang Hai Chen , Guo Tong Yan
Published: August 2013

In this paper, the laser sensor is used to detect environmental information. The problems of maps building of mobile robot are researched in the indoor structured environment. Least squares algorithm is adopted to build local maps, and a method of dynamic partition are presented based on the distance of adjacent points and angle. For accomplishing the self-localization and route planning of the mobile robot in the indoor environment lacking of the prior map, this paper present the method of the global map building based on the match of the feature points and the characteristic line. The experiments show the methods presented are effective and practicable.
Two-Dimensional Dynamic Analysis of an Ocean Umbilical Cable Using the Geometrically Exact Beam Elements
Authors: Quan Wei Cai , Zhang Zhu Ying , Zhang Ai Qun , Zhang Qi Feng
Published: August 2013

We present an idea for modeling flexible ocean umbilical cable using a nonlinear finite element method. The umbilical cable is assembled by Reissners geometrically exact beam elements, which take account of the geometric nonlinearities of large rotation and displacement, and effects of axial load and bending stiffness for modeling of slack cables. The linearization and discretization of the entire weak form for the umbilical cable system are proposed. The resulting semi-discrete motion equations are solved by the Newmark method. The capability of considering the action of horizontal ocean current is a key feature of this analysis. An example about the two-dimensional dynamic behavior of the umbilical cable system in depth-dependent ocean current with sinusoidal ship motion is presented.
Application of Axiom System in the Construction Method of BDD
Authors: Zhang Xu , Hu Dong Hua
Published: August 2013

This paper presents a brief introduction of BDD. Through the analysis of the question existing in BDD construction, such as a lot of useless variable nodes, repeated calculation, redundant nodes and calculation, and so on, this paper introduces axiom system and compute-table to the BDD construction and present a new method. This method eliminates the useless node, reduces redundant nodes and lots of repeated computation. It can improve the implementation efficiency and avoid wasting memory.
Modeling the CAD-CAE Collaborative Process Using Colored Petri Nets
Authors: Sun Qi Feng , Zhao Han
Published: August 2013

With the development of the technology of workflow management, the way of working in companies has been changed a lot. However, the traditional technology of workflow could only deal with the same type of instances. Aiming at solving the problem of collaborative work when there are multi-tasks between cross-departments, we propose an approach of modeling the task distribution process between cross-departments based on colored Petri nets. Firstly, the concept of colored Petri nets and some related characteristics are discussed. Then this method is applied to model the distribution process of CAD-CAE collaborative task. A model of CAD-CAE collaboration is given. Finally, the deadlock of the model is found and the solution is proposed.
Optimal Design of a Speed Reducer
Authors: Lin Ming Hua , Tsai Jung Fa
Published: August 2013

The mathematical model for optimal design of a speed reducer is a generalized geometric programming problem that is non-convex and not easy be globally solved. This paper applies a deterministic approach including convexification strategies and piecewise linearization techniques to globally solve speed reducer design problems. A practical speed reducer design problem is solved to demonstrate that this study obtains a better solution than other methods.
Table Type Sun Drying for Seaweed Preservation
Authors: Surata I Wayan , Nindhia Tjokorda Gde Tirta , Atmika I Ketut Adi
Published: August 2013

Open sun drying is one of the oldest techniques employed for processing agricultural products. The local practice of drying the seaweed is by spreading it over a plastic sheet on the ground and exposing it to the sun. Unfortunately, such traditional practice of drying seaweed has led to increased risk of contamination of seaweed by dust and sand particles and other impurities, as well as seaweed often suffer from lower quality. This research was conducted to examine the effect of application of table type sun drying on quality of dried seaweed, through indicators of water content, level of impurities, and brightness. The dryer was designed by using aluminum as a drying surface, with holes for circulation. The surface of aluminum is blackened to increase temperature. The results of study showed that table type sun drying reduced water content rapidly, reduce level of impurities, and improve brightness of dried seaweed.
Precision Motion of Iterative Learning Controller Using Adaptive Filter Bandwidth Tuning by Improved Particle Swarm Optimization Technique
Authors: Huang Yi Cheng , Li Shu Ting , Peng Kuan Heng
Published: August 2013

This paper utilized the Improved Particle Swarm Optimization (IPSO) technique for adjusting the gains of PID and the bandwidth of zero-phase Butterworth Filter of an Iterative Learning Controller (ILC) for precision motion. Simulation results show that IPSO-ILC-PID controller without adaptive bandwidth filter tuning have the chance of producing high frequencies in the error signals when the filter bandwidth is fixed for every repetition. However the learnable and unlearnable error signals should be separated for bettering control process. Thus the adaptive bandwidth of a zero phase filter in ILC-PID controller with IPSO tuning is applied to one single motion axis of a CNC table machine. Simulation results show that the developed controller can cancel the errors efficiently as repetition goes. The frequency response of the error signals is analyzed by the empirical mode decomposition (EMD) and the Hilbert-Huang Transform (HHT) method. Errors are reduced and validated by ILC with adaptive bandwidth filtering design.
Fault Diagnosis Method of Gearbox Based on Local Mean Decomposition
Authors: Zhang Jian , Li Hui Mei , Tang Yan Feng , Wang Qin Qin
Published: August 2013

Local mean decomposition(LMD),which is a new time-frequency method, can decompose a complex multicomponent modulation signal into a linear combination of a finite set of mono-component modulation signals. LMD integrates two signal processing procedures: decomposition and demodulation, and it can extract modulation feature efficiently. The basic theory and algorithm of LMD is introduced, and the effection of LMD is verified trough simulation. LMD is applied in gearbox fault diagnosis and successfully extracts modulation feature.
Hazard Identification & Risk Assesment in New Chassis Assembly Line
Authors: Sripathi Raja J. , Siva Prakash M. , Vellaichamy N. , Senthil Kumar K.L. , Palani K.
Published: August 2013

Chassis assemblies in any automobile industries are vulnerable to several hazards. In order to reduce the hazards we need to study and carry out Hazard Identification & Risk Assessment in New Chassis assembly to provide engineering solutions for preventing Accidents / dangerous occurrences and to evaluate the Risk. We have conducted many inspections and observation in the chassis assembly of an automobile industry. From our observations and findings we identified nearly 20 intolerable risks in the chassis line, for which the intolerable risks are converted into tolerable through small projects and those which cannot be converted are reduced through Safe Job Procedures (SJP). All the significant risks are controlled by Occupational Health & Safety Management Program, Standard operating procedures & Operation Control Procedure. From the project, the hazard is minimized or eliminated which ensures safety in the assembly line as well as the safety of workers.
Research on Evaluating Methods of Automobile Energy-Saving for Management Technology
Authors: Li Xiao , Liu Li , Li Zhong Xiang
Published: August 2013

Relative to other types of energy-saving technology, there is no standard evaluation method for the management kind. The paper summarizes the principle of management energy-saving technology, and regards the actual load rate as evaluation index. The curve fit of statistic data is conducted by regression analysis, and the relation model between actual loading rate and unit consumption is established based on the fitted curves. This model can be used for the evaluation of automobile energy-saving for Management technology.
Effect of Co Addition on the Microstructure of Matrix in Tungsten Carbide Reinforced Surface Composite
Authors: Li Zu Lai , Shan Quan , Jiang Ye Hua , Zhou Rong , Sui Yu Dong
Published: August 2013

WC-Co surface reinforced composite was formed by V-EPC (vacuum-expendable pattern casting), and the microstructure of the matrix in the composite was investigated. The results show that the Co addition caused the appearance of granular pearlite and troostite in the matrix, therefore the brittle tendency of the composite was lighten. After the molten steel infiltrating into the preform, the component diffusion in matrix decreased from the substrate to the surface of composite, the composition of the matrix became more uneven, and the formation of the granular pearlite and troostite were facilitated. When the atomic concentration of W and C in the matrix increased, Co3W3C, η type carbide, was easier to separate out. Before the temperature of the composite drop to 1200°C, Co3W3C could precipitate in the interface reaction between the matrix and the tungsten carbide particles, the hardness of the matrix would be increased, and then the abrasive resistance of the composite could be improved.
Effect of TiO2 Nanoparticles on Tensile and Photodegradation Behavior of Biopolymer Films Based on Poly(Butylene Succinate)
Authors: Buasri Achanai , Chaiyut Nattawut , Loryuenyong Vorrada , Worachat Metta , Kanchanapradit Rapeepan , Baibou Sirikan
Published: August 2013

Tensile and photodegradation behavior of poly (butylene succinate)/titanium dioxide nanoparticles (PBS/TiO2) composite films were investigated over a range of filler content 0-10 wt%. The surface of TiO2 nanoparticles was treated using propionic acid (C3H6O2) and n-hexylamine (C6H15N) order to disperse them into the bipolymer matrices. The nanocomposite materials were prepared by solvent evaporation technique and compression molding machine. All samples with a wide range of filler addition exhibit the translucency. The surface morphology showed that a uniform dispersion of filler in the matrix existed when the nanoparticles content was less than 5 wt%. The results indicated that the percentage of weight loss of the nanocomposite films was higher than the neat PBS owing to UVA and UVC irradiation. Functionalized TiO2 nanoparticles existing on the surface area suppressed photodegradation of the inner and backside of film specimens. The biopolymer films can easily be degraded by photocatalytic oxidation of TiO2 under UV irradiation. The introduction of modified TiO2 into PBS matrix improved the tensile modulus of the nanocomposites.
Analysis of Warpage and Optimization of Parameter for Thin-Wall Plastic Part Moldflow-Based Software
Authors: Sun Qiu Hua , Wang Ming Wei , Pan Ren , Xin Wen , Lv Hong Yan
Published: August 2013

The injection molding process of plastic parts is simulated and analyzed through a three-dimensional model of bottom cover of USB (Universal Serial Bus) extender obtained by Pro/E software and MPI module of Moldflow software. Orthogonal test is applied to analyze the influence of press time, press pressure, mold temperature and melt temperature on the warpage of plastic parts. Those being influenced by factors above are listed in order as press pressure, melt tempreture, mold tempreture and press time. The optimum parameters are obtained by analyzing effect trend that the four factors can influence on warpage.
Polysulfonamide Thin-Film Composite Membranes Applied to Dehydrate Isopropanol by Pervaporation
Authors: Huang Shu Hsien , Wu Chuan Hsiang , Lee Kueir Rarn , Lai Juin Yih
Published: August 2013

To dehydrate the isopropanol (IPA) by the pervaporation separation process at 25°C, the polysulfonamide thin-film composite (TFC) membranes were prepared via the interfacial polymerization of diamines including 1,3-diaminopropane (DAPE), 1,3-cyclohexanediamine (CHDA) and m-phenylenediamine (MPDA) with 1,3-benzenedisulfonyl dichloride (BDSC) on the surface of modified asymmetric polyacrylonitrile (mPAN) membrane. Attenuated Total Reflectance-Fourier Transform Infrared (ATR-FTIR) Spectrometry, atomic force microscope (AFM) and water contact angle (WCA) measurements were applied to analyze chemical structure, surface roughness and hydrophilicity of the polymerized layer of composite membrane. In the dehydration of aqueous isopropanol solutions, the DAPE-BDSC/mPAN membrane had the higher permeation flux and the similar water concentration in permeate compared with the CHDA-BDSC/mPAN and MPDA-BDSC/mPAN membranes. The pervaporation performance of the composite membrane was affected by the chemical structure of the polysulfonamide polymer.
Fabrication and Performance of Ni-Co-P/Si3N4 Electroplated Composite Coatings on Al-Si Alloys
Authors: Li Yun , Fang Liang , Shen Wei Dong , Wang Sheng Chun , Cao Chun Lan , Hu Jia
Published: August 2013

In order to improve the wear resistance of Al-Si alloys, the electro deposition of Ni-Co-P/Si3N4coating on a hypereutectic Al-Si casting alloy was studied in this paper. The thickness, hardness, surface morphology, composition, adhesive force and wear resistance of Ni-Co-P/Si3N4coating were measured by optical microscope, micro-hardness tester, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), adhesive attraction scratcher and abrasion tester. It was shown that Si3N4particulates were uniformly distributed in the composite coating. And the effect of process parameters, such as electric current density, temperature, PH, plating time and component of electroplating bath,were obtained. The wear resistance of the coating was improved with the increase of hardness and the content of Si3N4in the coating. It was also improved by decreasing electric current density. The adhesion of the coating was poor for increasing the content of P and Co in the coating. At the same time, the coating was hard, friable, and easy to be broken with the decrease of temperature.
High Performance Liquid Chromatographic Analysis of Degradation Products of Tinidazole Pills
Authors: Xia Ting , Wang Jian Kang , Jiang Tao , Li Jing
Published: August 2013

To study the effect of different pH on degradation products of tinidazole pills and direct preparation of tinidazole pills, Tinidazole pills were prepared and the solution of different pH was compounded. The tinidazole content of pills and degradation products were determined by being heated at 80°C via high performance liqud chromatographic (HPLC). The number and concentration of tinidazole pills were increased with the increase of temperature and pH. Tinidazole pills in acidic conditions with the pH value within 4~5 were more stable than in neutral and alkaline conditions. It was shown that shortening the melting time and keeping pH value within 4~5 were in favor of preparation and assurance of pills quality.
High Temperature Testing of Cement Mortar Containing MSWI Bottom Ash
Authors: Pavlík Zbyšek , Keppert Martin , Pavlíková Milena , Trník Anton , Černý Robert
Published: August 2013

High temperature testing of cement mortar containing bottom ash (BA) generated by municipal solid waste incineration (MSWI) as partial replacement of natural aggregate is presented in the paper. The measurements of mechanical properties, bulk density, matrix density, and total open porosity are performed on samples exposed to the temperatures of 20°C to 1000°C. TGA analysis is performed as well. Finally, the studied samples are analyzed by IR spectroscopy in order to evaluate TGA data. The obtained results indicate a comparable performance of the mortar modified by BA with the reference material.
Illumination Time Dependent Degradation of C60 Solar Cell Efficiencies
Authors: Imran Murtaza
Published: August 2013

In contrast to the solar cells based on inorganic semiconductors, organic solar cells degrade during illumination. Therefore, the influence of the illumination time on the efficiencies of an organic solar cell is investigated which reveals that under steady-state illumination at 1 sun (100 mW/cm2) the efficiency of the solar cell with the structure of ITO/CuPc/C60/BCP/Ag degrade significantly over few hours. There are three efficiencies that are of interest; Fill Factor (FF), Power Conversion Efficiency (PCE), and Quantum Yield (QY). Fill factor decreased less than power conversion efficiency and quantum yield, indicating that the degradation in those efficiencies is caused by photon-induced damage to the molecules that did not lead to an increase in internal resistance.
Prediction of Scattered Noise for Two Dimensional Non-Compact Cylinders with Compressible Calculations
Authors: Wang Fang , Liu Qiu Hong , Cai Jin Sheng
Published: August 2013

A computational method is presented to evaluate non-compact noise produced by compressible flow interacting with arbitrarily shaped solid objects. In conjunction with compressible calculation, hybrid computational aeroacoustics method is used to develop noise calculation. Scattering effect induced by non-compact surfaces is the prime objective to study in the present research, the fluctuations of flow variables are decomposed into hydrodynamic component mainly produced by fluid flow and acoustic component mainly produced by noise propagation. Non-compact integral surface is divided into enough fine elements, and scattered pressure on body surface is firstly captured by acoustic calculation. The acoustic noise of two dimensional stationary circular cylinders at low Mach number is considered with diameter D=0.019m (Re=90000) and D=1m (Re=100). Numerical results indicate that the noise predicated by the present method is as accurate as noise directly computed by Curles equations at low frequency, the total noise of cylinder model has a dipole-like directivity, but a petal-like pattern at high frequency when scattering effects gradually strengthen. This method exactly captures scattered noise produced by noncompact bodies, and the influence of scattered noise with increased frequency is evaluated simultaneously in this paper.
Microstructure Analysis on LILW Waste Disposal Facility by Accelerated Steel Corrosion Tests
Authors: Kim Ki Beom , Lee Jang Hwa , Kim Do Gyeum
Published: August 2013

Concrete structures such as LILW waste disposal facility located near the sea may suffer from chloride attack damages. This study aims to analysis mock-up test for acceleration corrosion of reinforcing bar and its deterioration in concrete structures by XRD and chloride diffusion coefficient. Corrosion acceleration experiment test has been developed and used to evaluate the effect of corrosion of reinforcing bar caused by seawater on engineered barrier of LILW waste disposal facility.
ZnO Nanorods on Polymer Substrate by Solution Method
Authors: Lee Seung Rok , Heo Si Nae , Anwar M.S. , Faheem Ahmed , Koo Bon Heun
Published: August 2013

In this research, ZnO nanorods were fabricated on the polymer substrate using a hydrothermal process. The grown nanorods were characterized by x-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and Raman measurements. ZnO nanorod arrays have been fabricated with diameter of 30-50 nm, and highly c-axis oriented with hexagonal wurtzite structure and perpendicular to the substrate with high crystalline quality. Room temperature Raman measurements exhibit high intensity E2 high mode and low intensity defect related mode.
Study of Magnetic Transition and Magnetocaloric Effect in La1-xSrxMnO3 (0.20≤ x ≤0.35) Compounds
Authors: Jeong Yeong Seung , Anwar M.S. , Ahmed Faheem , Lee Seung Rok , Koo Bon Heun
Published: August 2013

We report the magnetic transition and large magnetic entropy change in Sr doped lanthanum manganites. Polycrystalline La1-xSrxMnO3 (0.20 x 0.35) samples were prepared using the conventional solid-state reaction method. The results of X-ray diffraction indicates perovskite phase without any impurity. The magnetic study has revealed that the Curie temperature is influenced by Sr-concentration. The doping of Sr at La site affects the Mn-O bond length and Mn-O-Mn bond angle due to the difference in their ionic radii, consequently, the Curie temperature changed. A large magnetic entropy change has been observed for La0.8Sr0.2MnO3 sample, the value of the maximum entropy change (SMmax) increases from 1.42 to 2.74 J/kgK as magnetic field increases from 1 to 2.5 T. This investigation suggests that La1-xSrxMnO3 can be used as a potential magnetic refrigeration material.
Experimental Investigation of Three-Phase Foam Sealing Material for Fractured Borehole
Authors: Chen Xue Xi , Chang Zhong Qian , Li Qi
Published: August 2013

To develop a kind of ideal sealing material, uniform experiments were conducted in a simulation test device after the determination of material composition and approximate ratio range. The experimental data was fitted by stepwise regression analysis and optimal mixture ratio was obtained. The reliability is perfect when the ratio of foaming agent FP, foam stabilizer WP, solid filler RX and solid filler GX is 1.5:2:3:3. Field application tests show that sealing material in the above ratio has advantages of less time waste, higher reliability and better adaptability. It has a wide application prospect for fractured borehole sealing.
The Gravity Effect of Mount Design on the Mirror Optical Aberration
Authors: Lin Yu Chuan , Chang Shenq Tsong , Lee Long Jeng , Huang Ting Ming
Published: August 2013

Optomechanical analysis and design approaches for development of large mirror mount are presented in this article. The relationship between mirror optical aberration and gravity effect is studied for difference mirror mount designs. A detailed structural analysis of mirror mount design using finite element model combined with Zernike polynomials fitting is found successfully to predict optical aberration in the Cassegrain optical system.
Based on Lifting Wavelet Voltage Sag Detection Algorithm and Achieve
Authors: Yin Xin Liang , Wang Gui Tang , Feng Zhi Wen , Lai Xiong Hui
Published: August 2013

Voltage sag belongs to a kind of transient power quality problems, it possesses short mutations, non-stationary characteristics and the detection on the interference is difficult. Wavelet transform is a better signal analysis method and it is very suitable for analysis of mutations in the signal. Compared with traditional wavelet transform algorithm, Wavelet transform algorithm does not depend on the ascension of the Fourier transform and it reduces the computation complexity, so it is very suitable for hardware implementation. This paper introduces a design based on 9/7 of lifting wavelet transform of the voltage sag detection algorithm, and realized in the FPGA and modeling the transient power quality signal in the Matlab. To make hardware implementation easier, a series of optimization to the coefficient of ascension of 9/7 of lifting wavelet transform was carried out. The results show that 9/7 of the lifting wavelet transform algorithm can effectively test the end time of the voltage sag happens.
The Defect Classification of TFT-LCD Array Photolithography Process via Using Back-Propagation Neural Network
Authors: Chen Shih Feng , Lai Chin Chih
Published: August 2013

This research is conducted mainly by using the Auto Optical Inspection (AOI) in the fifth generation TFT-LCD factory. In the development of detect-classification system, we designed the back-propagation neural network which combined with Visual Basic as the interface and MATLAB as an image-processing tool. The system is able to determine and display the detected results. The defect classification mainly designed to detect and classify the following defects: the second layer of the photo resist residue (AS-Residue), the second layer of large-area photo resist residue (AS-BPADJ), and the third layer of photo resist residue (M2-residue) in the Array Photolithography Process. Finally, the result is shown the fact that without the complicated processing procedures, the four defects in the TFT-LCD Array Photo Process can be precisely and quickly classified by imaging processing and back-propagation neural network training. As result, it is feasible to reduce the costs and the risk of human judgments.
Experimental Study on Cavitation Boundary of Journal Bearing
Authors: Yang Ying , Xu Li , Liu Wen Qing
Published: August 2013

Under high and super-high speed conditions, oil film of the journal bearing is easy to crack and then becomes cavitation. The existence of cavitation has a great effect on the work characteristics of the bearing. Cavitation boundary of a three-groove journal beaing was investigated on the journal bearing experimental rig. The influences of rotating speed and supply pressure on cavitation boundary were studied. And experimental equations of reformation location and the percent of rupture area are established. The results show that rupture location of oil film is not related with rotating speed and supply pressure, otherwise reformation location of oil film is effected greatly by them. The experimental equations lay foundations for next research on cavitation theory model and stability.
Modelling and Design of Closed-Loop Manufacturing Systems
Authors: Kutin Andrey A. , Turkin Mikhail
Published: August 2013

This paper introduces an analytical method for evaluating the performance of closed loop manufacturing systems with unreliable machines and finite buffers. The method involves transforming an arbitrary loop into one without thresholds and then evaluating the transformed loop using a new set of decomposition equations. It is more accurate than existing methods and is effective for a wider range of cases. The convergence reliability, and speed of the method are also discussed. In addition, observations are made on the behavior of closed loop production systems under various conditions. Finally, the method is used in a case study to design a flexible manufacturing system for production of aerospace parts.
Modal Identification Using Blind Source Separation Based on Moving Average Method
Authors: Du Jian Hua , Huang Hong Wu , Lan Dian Dian
Published: August 2013

The paper discusses the basic principles of blind source separation and modal identification of structures, analyses the feasibility that using blind source separation techniques for modal parameter identification. According to the noisy features of the measured data in experiments, a second-order blind identification algorithm based on moving average method is proposed. By moving average method the noises are efficiently eliminated. It greatly improves the separation performance of this algorithm. The cantilever experiments verify the stability and the applicability of the algorithm.
The Evaluation of Solar Energy Availability at Ground Level Using Satellite Resources
Authors: Ceacaru Mihai Cristi , Dumitrescu Alexandru , Badescu Viorel
Published: August 2013

A well known statistical method for the determination of solar energy available at ground level (HELIOSAT) is presented. The method makes use of satellite data. The data are provided by the geostationary satellite Meteosat. In the first step, a reference map of cloudinees index from satellite data is deduced from the time-sequence of satellite images. Next, is calculated the global solar irradiance from satellite and the global solar at ground, considering cloudinees index from satellite and respectively cloud cover measured at ground .The paper describes some preliminary activities related to the implementation of this method for the latitudes of Romania.
The Failure Cause and Fault Tree Analysis to the Blade of Flue Gas Turbine
Authors: Yang Jian Feng , Chen Ling Ling , Liu Wen Bin
Published: August 2013

Flue gas turbine is one of the highest failure rate of the power equipment in oil refinery now.It is a key role to achieve saving energy and reducing consumption, the goal ofpollution reduction and the safe, reliable and efficient operation of the flue turbine in refinery. Therefore, it is of great significance to the fault diagnosis of the blade by summarizing the fault reason of the flue gas turbine and using fault tree analysis.
Determination for Tool Edge Geometry and Cutting Conditions by Using FEM Simulations and Experiments
Authors: Baek Seung Yub
Published: August 2013

Hardened steel, Ni-based alloys and brittle materials are very difficult to machine using conventional cuttingmethods.A tool edge with a small nose radius can alleviate the regenerative chatter. In general, it is important for conventional cuttingto use the smallest possible tool nose radius. A sharp tool shape has an adverse effect on tool strength and the instability of machining process still occurs. A tool wear model with small nose radius proposed by past researchers is evaluated for predicting metal cutting tool wear when machining the copper. Tool temperature values are determined using finite element methods simulation. These temperatures are related to tool wear measured after metal cutting turning tests on a copper workpiece to determine tool edge geometry in low metal tool model.In this study, the effects of cutting conditions and tool edge geometry on process stability in turningare investigated through experiments and FEM simulations.
The Research of Software Defect Management
Authors: Wang Xin Ping
Published: August 2013

The management of defect tracking is one of important part of testing. The objective of test aims to find out the defect of software system. Therefore, the management of tracking defect, regarded as a vital part in the test, ensuring every observed defect immediately coped with. The paper discusses the objective of software defect management, the definition of defect ranking, the process of tracking defect management, and illustrates it with combining the Lotus Notes/Domino localized defect management.
Research on Design and Security Strategy of DNS
Authors: Ji Hong
Published: August 2013

DNS service plays a very important role in the Internet; each host must pass it to query the IP address of the destination host, and can communicate with each other. DNS uses a distributed database structure and server/client mode, which is stored domain name in the server and allowed a client to access the required data. DNS can resolve the host name to the corresponding IP address, while it also can resolve IP address to a host name. With the development of information technology, the network attacks become more and more frequent occurrence in the Internet. So DNS system has suffered a series of attacks frequently, and the communication is severely affected in the Internet. Therefore, the security problems of DNS are increasingly concerned about. The paper describes the composition, features and working principle of DNS system. According to the security risks of the system, it proposes the corresponding security strategy and designs a reliable and safe DNS.
The Trial of Archives Information Management System Based on B/S Architecture
Authors: Xi Chang
Published: August 2013

This paper considers creating a archives management information system based on Access database, Browser/Server Architecture and web finish the operations such as archives entering,borrowing,inquiry,statistics and backup.Its aim is high efficiently to built database and integrated management, instantly.The system is safe,reliable and easy to use.It makes archives management standardized and scientific.
Design of Reconfigurable Multi-Process or Architecture for High Performance Computing
Authors: Zhang Fan , Luo Xing Guo , Zhang Xing Ming
Published: August 2013

In this paper, the design used Reconfigurable multi-processor Architecture (Reconfigurable Multi - Processors Architecture, RCMPA), the system can adapt to a variety of applications, through the multi-processor parallel execution and flexible configuration system. At the same time, each computing components in the system constitute by the general microprocessor, the reconfiguration of FPGA and SRAMs. General purpose microprocessor can realize the control of a variety of tasks, scheduling, and some computing functions. FPGA can offer sufficient flexibility, extensibility and high-speed Internet features. SRAMs can offer all kinds of storage structure of high-speed read and write speed and high density storage unit.
Marker-Based Framework for Structural Health Monitoring of Civil Infrastructure
Authors: Magdics Milán , Garcia Rubén Jesús , Sbert Mateu
Published: August 2013

As no civil infrastructure can escape aging and deterioration, health monitoring can prevent and report serious structural damage. With the rapid evolution of computer vision algorithms, optical-based systems become an increasingly feasible option for automatic monitoring. This paper proposes a cheap and flexible standalone system based on marker tracking to report deflection of structural elements of civil infrastructure. A single marker is placed on tracked objects, which allows unambiguous identification of objects and accurate movement tracking. Accuracy of the system is discussed by presenting a theoretical analysis of the translation error. Additionally, as a proof of concept we extend our work with a low-cost laboratory test implementation.
Using Structural Similarity to Classify Tests in Mutation Testing
Authors: Strug Joanna , Strug Barbara
Published: August 2013

Mutation testing is an effective technique for assessing quality of tests provided for a system. However it suffers from high computational cost of executing mutants of the system. In this paper a method of classifying such mutants is proposed. This classification is based on using an edit distance kernel and k-NN classifier. Using the results of this classification it is possible to predict whether a mutant would be detected by tests or not. Thus the application of the approach can help to lower the number of mutants that have to be executed and so also to lower the cost of using the mutation testing.
The Influence of Strain Rate on the Curves of Natural Strain Resistance
Authors: Vagaská Alena , Kmec Jozef , Fechová Erika
Published: August 2013

In the area of manufacture qualities of constructional materials special emphasis on knowledge of physical fundamentals of mechanical, electrical, chemical and magnetic properties of substances is put. The paper deals with material properties of steel sheet metals at various strain rates.
Topological Optimization Design of Top Beam of the Longmen Milling Machine Based on Hyperworks
Authors: Jia Ning , Liu Fu Yun , Yang Yun Ze , Gan Lin , Chang Qing Qing
Published: August 2013

Topology optimization is a kind of optimized method, which can seek for an optimal allocation of structural material according to the load,constraints and optimization goals .To achieve the lightweight design of the top beam, establishing a minimum strain as the objective function, the volume fraction as the constraint conditions, and the density of design domain as the design variables,implementing the topology optimization for the top beam,the optimal distribution of top beam material is obtained, which provide a basis for the manufacture of top beam.
A Structured Global Index Identifier Definition for Constructing Manageable, Operable and Scalable P2P Networks
Authors: Zhang Heng
Published: August 2013

P2P technology is potentially one of the cornerstones of future networks. But the absence of standards makes it difficult to operate and control P2P-based networks. In the paper, we defined a structured global index as the basis for constructing future manageable, operable and scalable networks, and try to find a way to solve the inherent problems of current P2P networks, such as interaction in heterogeneous networks and multi-dimensional query issues. In the beginning of the paper, we give an introduction on current P2P networks and summarize the problems; and then we will describe the structured global index in detail; finally, we give a prospect on future operation network, and through two cases to illustrate how the problems are solved.
Mechanical Behavior of Aged Ti-15V-3Cr-3Sn-3Al Alloy
Authors: Chou Ying Kai , Tsay Leu Wen , Wang Ying Chiao , Chen Chun
Published: August 2013

The effect of aging treatments on the mechanical behavior of Ti-15V-3Cr-3Sn-3Al (Ti153) alloy was evaluated in the present study. Properties of the two-step aged specimens were also compared with those of the one-step aged specimens. The second aging treatment, which was performed at 426o°C for 24 h, apparently raised the tensile strength at the expense of the notched tensile strength for the specimens previously aged at 426°C or below. On the other hand, the second-step aging had a minor effect on further hardening of the specimens prior to aging at 538°C and 593°C. In general, the J-integral value (fracture toughness) had the same trend as that of the notch brittleness of the specimens. Overall, the specimens subjected to the two-step aging treatment did not show any advantage over the specimens subject to one-step aging treatment.
Fuzzy Swot Analysis for Selection of Bankruptcy Risk Factors
Authors: Zakharova Alexandra A.
Published: August 2013

The article discusses applicability of fuzzy SWOT analysis for bankruptcy risk management of companies. The article also provides its implementation strategy, sample determination of external and internal factors’ significance and their combinations for bankruptcy risk management strategy of company.
Solid Phase Synthesis of Coating on the Base under the Electron Beam Surfacing
Authors: Sorokova S.N. , Knyazeva A.G.
Published: August 2013

Two-dimensional model of the Ti-Ni coating synthesis in condition of the electron-beam treatment is suggested and investigated. The base is iron. The system of chemical reactions is written according to the phase diagram of Ti-Ni.The results of numerical investigation of the model which illustrate the role of the technology parameters in the conversion regimes are represented. Distribution of temperature and elements concentration and compounds in different time moments for different synthesis conditions are constructed. It is shown that at any process organization the synthesized material becomes chemically heterogeneous.
Evaluation of Visual Fatigue Caused by 3D Display
Authors: Wang Li Li , Tu Yan , Shen Li , He Ya Guang , Zhang Wei
Published: August 2013

Visual fatigue caused by 3D display was studied in a subjective experiment. Electroencephalographic, event-related potentials and some eye-associated parameters were recorded to measure fatigue. Results show that, the increase of blink duration, power of α wave, and latency of P300, together with the decrease of pupil size, can well reflect 3D visual fatigue.
A Video Image Segmentation Technology Based on Adaptive Thresholding Algorithm
Authors: Zhao Hai Jun
Published: August 2013

Image segmentation is a key step in image processing and image analysis and occupies an important position in image engineering.In this paper, basing on maximum variance between-class, an adaptive and multi-objective image segmentation method is proposed. The concrete implement is to determine adaptively the optimum number of threshold of image using the idea of variance decomposition,while calculating the weighted ratio of within class difference and class difference existing in each classification image. By comparing the ratio, the optimum number of target for image can be get. The experimental results show that the sub-images after segmentation are relatively clear and the differences between classes are obvious.
Main Drive Vehicle of Two-Stage Driving Axle Design
Authors: Hu Hao , Yan Ying Min
Published: August 2013

In this paper, the overall requirements for the design of the drive bridge is analysed, the programme of the structure on the drive axle assembly and component parts is studied. The overall design and programme design on the drive axle assembly is finished; the basic structure of the double reduction final drive and the middle tandem axle is ensured which refers to the structure of the reference model CA1092; The basic components on the drive axle assembly are designed. The calculation of their basic geometric parameters is finished, and the strength of the parts which have greater impact on the overall strength is checked; and the remaining components are designed briefly. The paper gave a briefing on the characteristics of Solidworks 2008 software and virtual assembly technology. Introduces three-dimensional maps of parts which are draw by SolidWorks software and describes drive axle assembly by the form of diagrams.