bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the File Encryption and Programming Based on Matrix Transformation
Authors: Geng Jiang Tao , Huang Qi
Published: January 2014

Any linear transform matrix can be used to easily calculate a consistent form, and a plurality of conversion can be easily connected together by matrix multiplication. When performing file transfers, you can encrypt files matrix transformation. Article presents a matrix-based electronic document encryption and decryption algorithm, which relies on a special class of matrices combinatorial problems, the method to improve the security of electronic document system is feasible and effective, and finally give the source code and programming software.
Multi-Scale Noise Reduction Based Wavelet
Authors: Li Rui Xian
Published: January 2014

Traffic flow sampled data is noisy and chaotic time series. Complex noise component affects the traffic flow predictability. In this paper，it used multi-scale noise reduction based on wavelet/wavelet packet to shield the traffic flow’s noise components interference in deterministic component.It aimed at the contradiction between similarity and predictability in traffic flow noise reduction process, then proposed multi-state threshold method. Experimental results show that, compare with the traditional threshold value method, the threshold method can more effectively extract the traffic flow’s effective information. This method not only made traffic flow which is reduced noise higher goodness of fit, and the prediction accuracy is higher than the traditional threshold methods, thereby we can significantly enhance prediction performance.
Study on the Construction of 3-Dimensional Image by Support Vector Machine
Authors: Sun Jun
Published: January 2014

The construction of object 3-dimensional image is the thinking base of machine learning, it is important to machine recognize the outside world. The current algorithms of object 3-dimensional image construction are mainly based on the least squares method (LSM) in linear or nonlinear models, all of them existed some defects and deficiencies. The paper introduced the construction principle of 3-dimensional image by support vector machine, then the algorithm and step was put forward, as well as the key code in the Matlab7.4.
Improvement of Hadoop Security Mechanism
Authors: Li Xin Liang , Zheng Jian De
Published: January 2014

Hadoop, as an open-source cloud computing framework, is increasingly applied in many fields,while the weakness of security mechanism now becomes one of the main problems hindering its development. This paper first analyzes the current security mechanisms of Hadoop,then through study of Hadoop's security mechanism and analysis of security risk in its current version,proposes a corresponding solution based on secure multicast to resovle the security risks. All these could provide certain technical supports for the enterprises in their Hadoop applications with new security needs.
Fault Detection Way for Computer Networks Based on Multiple Stages
Authors: Li Hong Biao
Published: January 2014

To relieve traffic overhead induced by active probing based methods, a new fault detection method, whose key is to divide the detection process into multiple stages, is proposed in this paper. During each stage, only a small region of the network is detected by using a small set of probes. Meanwhile, it also ensures that the entire network can be covered after multiple detection stages. This method can guarantee that the traffic used by probes during each detection stage is small sufficiently so that the network can operate without severe disturbance from probes. Several simulation results verify the effectiveness of the proposed method.
Integrated Design of Testing Software in Machinery Production
Authors: Liu Wei , Cao Gong Kun
Published: January 2014

The development of modern scientifical technology has greatly promoted the reformation in the field of machinery industry; meanwhile, this technology development has also brought tremendous impact on the relevant production industry as well as improve the level of production and technology. With the integrated development of various technologies, electromechanical control areas will contribute to more practical applications in industrial and scientific research as well as other fields, with core fields in computer electronics technology and mechanical technology. This paper will outline the development of mechanical and electronic control in industry. Besides, this paper will also focuses on the wide applications introduction of computer testing software in the machinery and electronics industries as well as industrial production manufacturing and people's daily life.
Mechanized Production Based on Computer Application Software
Authors: Cao Gong Kun , Liu Wei
Published: January 2014

with the continuous development of science and technology, computer technology has had great development, which also greatly promotes the development of the industry, especially changes in the field of mechanical industry, which has an inseparable relationship with the development of the computer, at the same time it also has brought enormous business opportunities for the relevant industry, improving the level of the mechanization of production technology, the integration and mutual development between the various technical, computer application software has been applied to all levels, taking computer software as the core and Mechanization technology as technology, which will bring more innovation to mechanized production. This article illustrates summatively the computer application software and its mechanized production, and mainly introduces the application of computer technology in mechanical and industrial production and manufacturing, and from which brings the practical application to human.
Gear Class Components Parameterization Based on AUTOCAD
Authors: Wang Zheng Jun
Published: January 2014

In order to achieve gear parts design automation. This paper proposes a parametric design ideas, the use of Auto-CAD's VBA language and Dialog control language (DCL), which can input the various parameters for gear class by dialogue box, and can calculate the value of gear class, proofreading and draw each parameter gears different structure design, that can output fully automated computer-aided design system. Experimental indicate the system can complete gear design parameters, should be widely applied.
Manufacturing Image in Painting Based on Partial Differential Equations
Authors: Liu Fu Xiang
Published: January 2014

For TV model, repair algorithm only along the gradient perpendicular to the direction of diffusion that will cause staircase effect, iterative low efficiency and generate false edge of the shortcomings. The article improved K and P parameters of manufacturing image restoration algorithm. The algorithm contains both isotropic and anisotropic diffusion, taking regional frequency difference realized in different areas using different iterative equation. The experimental results show that the algorithm is compared with the TV model algorithm has the same restorative effects, avoid the staircase effect and better than the TV model repair speed.
Research on the Mine Slope Stress Detection and Warning System
Authors: Bao Guang Ming , Chang Juan , Liu Zhi Gang
Published: January 2014

The innovation of computer software and hardware technology has brought the power to support strong for the numerical simulation technology, and computer three-dimensional simulation has been applied to various engineering fields. Engineering safety early warning system is a hot problem of the computer simulation, in which using the ANSYS computer software can calculate the stress numerical in engineering to carry out stress analysis, which could realize the function of engineering safety early warning. In this paper, the mining slope stress calculation and prediction as an example, we carry out calculate the stress of mine slope, and as can be seen from the calculations, mine stress does not reach the ultimate safety value, the maximum stress of mine Y direction reached is 5.81Mpa, exceeding the limit value of 5.60Mpa; Z direction compressive stress is reached 3.78Mpa, more than the stress limit 3.56MPa. After the stress limit, mine is prone to landslide hazard, so this paper markers the dangerous positions through the ANSYS software, which can be the successful implementation of the mine slope stress detection and early warning.
Blind Estimation of Long Code DSSS Signal Based on Subspace Tracking
Authors: Ma Chao , Zhang Li Min , Wang Jian Xiong
Published: January 2014

Aiming at solving the blind estimation problem of dispreading spectrum sequence under low SNR, a spread-spectrum estimation algorithm based subspace tracking is studied in this paper. This method avoids the direct eigen decomposition, using the sliding window technique to obtain the code synchronization, then use segmentation subspace tracking method estimate spreading sequence and splice in a certain order to achieve pseudo-code blind estimation. The results show that the algorithm can complete the accurate estimation of PN code sequence in low SNR conditions, reduce the amount of data storage and be easy hardware implementation
Optimal Path Algorithm Analysis of GPS Navigation Based on A* Algorithm
Authors: Ding Ming Li
Published: January 2014

The optimal path algorithm analysis of GPS navigation in taxi management system based on A* algorithm was introduced in this paper. Through improving the traditional Dijkstra algorithm and avoiding problems such as time-consuming and low efficiency in Dijkstra algorithm with traversal search for each node, A* algorithm could help the taxi find the optimal path and bring convenience for traffic management.
Thermal Conductivity of Hexagonal SiC Nanowire by Nonequilibrium Molecular Dynamics Simulations
Authors: Wang Zan , Guan Hua Wei , Bi Ke Dong
Published: January 2014

Using nonequilibrium Molecular Dynamics method, thermal properties of hexagonal 4H-SiC and 6H-SiC nanowires are investigated. The quantum errors between realistic temperatures and Molecular dynamics temperatures are rectified based on Density Functional Theory. Thermal conductivities of 4H-SiC and 6H-SiC nanowires are both simulated from 50K to 800K. The scale effect on the thermal conductivity of nanowire is also investigated by varying the nanowires length from 10nm to 130nm. Results indicate, if the length of phonon mean free path is shorter than that of nanowire, phonon-surface scattering will surpass boundary scattering to contribute thermal resistances. Therefore, the thermal conductivity of 4H-SiC or 6H-SiC nanowire is mainly determined by the comparability between the length of nanowires and phonon mean free path.
The Forming Process of the Stainless Steel Joint Part Numerical Simulation Analysis
Authors: Fu Guo Liang , Huo Zhi Yi , Zhao Li Po , Wang Qian
Published: January 2014

Stainless steel pipe joint parts is the most important parts to join the stress pipeline. internal defects are more likely to occur when stainless steel joint part is produced by traditional casting method or welding forming method, while the upsetting extrusion proposed in this essay can not only meet the part quality requirements, but also save material and shorten processing cycle. By numerical simulation analysis about part upsetting extrusion forming process with the finite element analysis method, we can obtain many index numerical values in part forming process, and therefore provide reliable quantitative basis for optimum design.
Prepartion and Properties of Zinc-Doped Hydroxyapatite Whisker
Authors: Wang Duan Cheng , Yan Ting Ting , Zhu Wei Bo , Huang Ming Hua , Chen Qing Hua
Published: January 2014

Hydroxyapatite is well used as bone repair materials. Degradation property and biological activity can be further improved by addition Zn into the HAP crystals. Zinc-doped hydroxyapatite whiskers with different content of Zn were prepared with calcium nitrate, Zinc nitrate and diammonium phosphate at the degree of 95°C. Zinc-doped hydroxyapatite whiskers were characterized by XRD, FT-IR, SEM and EDS. It was indicated that zinc can be doped in hydroxyapatite with proper process and zinc-doped hydroxyapatite whiskers were produced successfully.
Surface Roughness Analysis on Reactive Ion Etched Aluminium Deposited Wafer
Authors: Sauli Zaliman , Retnasamy Vithyacharan , Yeow Aaron Koay Terr
Published: January 2014

This paper investigates the factors that affect the surface roughness on an Aluminium deposited wafer after reactive ion etching (RIE) using a combination of Tetrafluoromethane (CF4) and Oxygen (O2) gaseous. A total of four controllable process variables, with 16 sets of experiments were scrutinized using an orderly designed design of experiment (DOE). The four variables in the investigation are the composition of CF4 gas, the composition of O2 gas, RF power, and time. The estimate of effect calculated for the composition of CF4 gas, the composition of O2 gas, RF power, and time are-0.9813, -0.7488, -0.0438, and 4.7138 respectively. All factors gave negative effects except for time. This implies that the surface roughness decreases when the content of CF4, O2, and RF power is high. The results indicate that time is the most influential factor compared to the other three factors and is directly proportional to the surface roughness of the etched Aluminium deposited wafer.
High Temperature Oxidation Behaviors of CNTs/MoSi2 Composites
Authors: Wu He Jian , Zhang Hou An , Gu Si Yong , Lin Jia
Published: January 2014

Molybdenum disilicide (MoSi2) matrix composites with various contents of carbon nanotubes (CNTs) were fabricated by sintering in vacuum at 1550°C for 1 h. The oxidation behaviors of CNTs/MoSi2composites at 1300°C for 200 h in air were studied. Results showed that MoSi2matrix composites with no more than 8 % CNTs in volume had good oxidation resistance at 1300 °C, although addition of CNTs reduced the high temperature oxidation resistance of MoSi2. An approximate linear relationship was found between the weight gain of CNTs/MoSi2composites and the content of CNTs. The oxidation resistance of CNTs/MoSi2composites at high temperature decreased with the increasing of CNTs contents. Since the gaseous products were formed during the oxidation process and escaped from the oxide film, the protective film became loose which offered channels for the oxygen soaking into the composites. Thus the oxidation resistance of CNTs/MoSi2composites was decreased.
A New Type of Lithium Ion Battery Cathode Material of Lithium Iron Phosphate Water-Based Composite Binder Research
Authors: Li Lei , Zhang Xian Yu , Wang Hong Wei , Wang Xin Ge , Wei Xiu Ling , Wang Jun Sheng
Published: January 2014

Gelatin and polyethylene oxide and styrene-butadiene rubber to blend with water as solvents, and add to improve adhesion surface active agent, the composition of multi-component blend to lithium iron phosphate batteries battery anode materials have the effect of adhesion. Experiments show that the multi-component water-based adhesives in lithium iron phosphate coating process good effect.
Microscopic Analysis of Intergranular Corrosion of 316L Stainless Steel
Authors: Li Li Chan , Chai Meng Yu , Bai Wen Jie , Duan Quan
Published: January 2014

316L stainless steel is a common material in nuclear power equipments. Intergranular corrosion is a hidden and destructive mode of material failure. It is important to study the intergranular corrosion behavior of the 316L to ensure the safety of nuclear power equipments. A series of research has been conducted on properties of 316L including the microstructure of the base metal and the weldment and that under the condition of intergranular corrosion. Through the experiments, an intuitive understanding of the microstructure of the base metal and the weldment has been established. Moreover, the intergranular corrosion resistance can be reflected by the condition of grain separation on metallograph. In resistance of intergranular corrosion, by comparison, the heat affected zone was the worst and the weld joint performed quite well. Thus, the heat effect in welding process must be controlled to improve the intergranular corrosion resistance of the equipment.
Main Effects Study on Plasma Etched Aluminium Metallization
Authors: Sauli Zaliman , Retnasamy Vithyacharan , Yeow Aaron Koay Terr
Published: January 2014

Main effects contributing to the quality of surface roughness on an etched aluminium metallization wafer using Reactive Ion Etching (RIE) was studied. A total of three controllable process variables, with eight sets of experiments were scrutinized using an orderly designed design of experiment (DOE). The three variables in the investigation are composed of CF4 gas, composed of O2 gas and RF power while time is constant. The estimate of effect calculated for composition of CF4 gas, composition of O2 gas and RF power are-2.205, -0.975, and-0.525 respectively. All factors gave negative effects. This implies that the surface roughness increases when the content of CF4, O2, and RF power is lower. The results suggest that the composition of CF4 gaseous as the most influential factor as its main effects plot has the steepest slope followed by oxygen and RF power.
Laser Cladding of Fluoridated Hydroxyapatite Coatings on Titanium Alloy: Preparation and Characterization
Authors: Yang Ge , Hu Shu Hui , Liu Yuan , Huang An Guo
Published: January 2014

In this research, Fluoridated hydroxyapatite bio-ceramic coatings were produced by laser cladding on the titanium alloy with hydroxyapatite and CaF2 as raw materials. The microstructures and phase constitutions of coatings were characterized by OM, SEM, EDS and XRD, the mechanical properties was investigated by micro-hardness and simulated body fluid immersion test. The results indicated that Fluoridated hydroxyapatite bio-ceramic coatings with anticipated structure and properties were achieved successfully by laser cladding on the titanium alloy. Compared with CO2 laser, the FHA coatings prepared by fiber laser had better deposition of biological activity phase.
Research on Influence of Moment Augment Factor of Column on Building Cost
Authors: Cai Bin , Liu Xin Hui
Published: January 2014

The new moment augment factor of column of the national Code for Seismic Design of Buildings (GB500112010) were increased, the strong column weak beam reliability of reinforced concrete structure were improved, at the same time, the cost of building were improved also. Influence of moment augment factor column on building cost was discussed by computer design software Guang Sha CAD. Result indicates that the increase of cost is very small.
Study on the Influence of Modularization on Warship General Design
Authors: Sun Hong Yuan
Published: January 2014

The versatility of ship is reflected in the modularization design. On the basis of summarizing the module and modular theory, the modularization design concept is applied to the design procedure of ships. This paper studied the impact of modularization on the ship general design, proposed an idea of functional areas. According to the different tasks, the light ship can be divided into three types: civilian type, guard type and military type.
Applications of RFID in the Mechanical Processing
Authors: Jing Yan
Published: January 2014

With the development of Radio Frequency Identification technology in recent years, it has been successfully applied to all areas of life. This article mainly elaborates the concept of RFID, system components, tracking and detection of machining processes and some other applications workshop production and management. It also puts forward the problems of RFID in machining and the application of RFID in machining for further prospects.
Synthesis and Electrical Applications of ZnS0.59Se0.41 Nanowires
Authors: Zhao Xing Zhi , Song Hong Wei , Ma Xu , Wang Xiang An
Published: January 2014

ZnS0.59Se0.41 alloy nanowires were prepared on gold-coated Si substrates by the thermalevaporation of a mixture of ZnSe and ZnS powders. Field-effect transistors (FETs) constructed fromthe ZnS0.59Se0.41 NWs verified their p-type nature with a hole concentration of 3.1×1018 cm-3.Inaddition,the photoresponse indicates their potential for photoelectric applications.
Study on the Mechanism of Grinding-Drill Taking Shape
Authors: Wang Hui Lin , Zhang Ping Kuan , Sun Wang Lu
Published: January 2014

For diameter being about 0.5mm, by means of the cutting mechanism of grinding & the virtue of supper hard abrasive grinding. It is achieved that the mini hole is machined in some difficult cutting material. The basic require of abrasive arranged on the end of the grind-driller, the method of cutting in the center of the drill, the mechanism of forming round hole are analyzed, The problems of grinding chip removing & stopping up are explored. The theory foundation is supplied to grind-drill small hole.
Application of Power Spectral Density Method to Fatigue Life Estimation of the Axle Structure
Authors: Guo Rui Feng , Wang Peng Li
Published: January 2014

Based on the random vibration theory, fatigue strength theory and Miner cumulative damage theory, the formulas for estimation of fatigue life which can be coped with narrowband and broadband random vibration was derived by the peak distribution function. The power spectral density function of axle structure is deduced after the power spectral density of standard road and the vibration model of wheel had studying. Combined the power spectral density function with broadband random vibration fatigue life estimation formula, the fatigue life of axle structure was obtained. This method is simple and has a strong engineering practicality.
Dynamic Parameter Identification of Unknown Object Handled by Space Manipulator
Authors: Chen Gang , Chen Zhi Lian , Jia Qing Xuan , Sun Han Xu
Published: January 2014

This paper presents a dynamic parameter identification method of the unknown object handled by manipulator. Since the load will change the dynamic characteristic of space robot system, it is necessary to identify the dynamic parameters of the handled object. The dynamic parameters of the handled object are identified based on principle of momentum conservation in this paper. The principle and experimental process of the identification is introduced and the feasibility of the method is verified by simulation.
Effect of Plastic Zone around Crack-Tip and its Criterion in Fracture Analysis
Authors: Zhang Le Di , Zhang Xian Yu , Li Lei , Fu Chan Gan
Published: January 2014

K-criterion that is used to boundary line and brittle fracture is presented when the size of plastic zone around crack-tip is less than that of adaptive zone of K-criterion by comparison adaptive zone of K-criterion with plastic zone around crack-tip in this paper. Finally numerical examples are given to illustrate the applications of the present method by comparison with other methods.
BaxSr1-x TiO3 Different Thickness Analysis Using Sol Gel Approach
Authors: Ramli Nurhafizah , Sauli Zaliman , Retnasamy Vithyacharan , Chin They Yee , Anwar K. , Abdullah Nooraihan
Published: January 2014

Barium Strontium Titanate (BST) a common topic in the microelectronic field for many devices which is mainly on dynamic random access memories (DRAM). There are many methods of preparing BaxSr1-xTiO3; barium strontium titanate. In this work, sol-gel method was used as it has some advantages like better homogeneity, lower cost, lower processing temperature and easier fabrication. BaxSr1-xTiO3 solution was deposited on the silicon substrate of 4 different thicknesses with different ratio of the concentration of Barium (Ba). The thickness of the thin film has a linear increase as the Ba content increases.
Velocity Profile Investigation of FFS Microchannel at Re 100
Authors: Retnasamy Vithyacharan , Sauli Zaliman , Taniselass Steven , Nadzri Nor Shakirina , Mei Tan Hsio , Anwar K. , Abdullah Nooraihan
Published: January 2014

Recently, microfluidics system has been widely employed in various areas for instance biomedical,pharmaceuticals and cell biological researchdue to its advantages. The flow behavior in microchannels with different cross-sections has been topic in previous studies. In this paper, numerical simulation of fluid flow in Forward Facing Step (FFS) configuration was performed to investigate velocity profile after the step. Reynolds numbers (Re) 100 with different step heights, 1μm and 3μm were used to observe trend occurs in the flow characteristics. The result illustrated an increase of velocity distribution with the increase of the step height.
WSS Investigation in Microfluidic FFS Channel at Re 500
Authors: Sauli Zaliman , Retnasamy Vithyacharan , Taniselass Steven , Nadzri Nor Shakirina , Mei Tan Hsio , Anwar K. , Abdullah Nooraihan
Published: January 2014

Wall shear stress (WSS) is one of the important variables in microfluidic devices. In this paper WSS distribution for a microfluidic device in Forward Facing Step (FFS) configuration has been investigated using Reynolds number 500 and step height 1μm. Numerical simulation was performed usingAnsys-CFX software with the assumption of Newtonian fluid and laminar condition. The simulation result showed that wall shear stress distribution increased after the fluid passing through the step.
Height Measurement Based on Fringe Projection
Authors: Retnasamy Vithyacharan , Sauli Zaliman , Nadzri Nor Shakirina , Veriven Christopher John
Published: January 2014

A three-dimensional surface measurement using fringe projection technique has received attention among the researches for the last few decades.However choosing the best method is the challenge because one needs to consider the cost, measurement speed, system complexity, measurement accuracy and data reliability to ensure the success of the measurement. This paper focused on the successful manipulation of non-collimated light source and three step phase shifting for height measurement of a lead frame.The measurement done based on pixel determination from the saw tooth image. In addition, the scaling factor technique has been employed for the measurement accuracy. The experimental results achieved a high precision of measurement with simple system and high speed capability.
Snoek-Type Anelastic Relaxation in a Water-Quenched Ti-Nb Alloy
Authors: Zhou Z.C. , Zhang Y.K. , Du J. , Yan Y.J. , Gu S.Y.
Published: January 2014

The internal friction of Ti-35.4Nb-0.05C (wt.%) was investigated using a dynamic mechanical analysis (DMA) Q800 from TA Instruments. It has been shown that a relaxational peak is observed in the water-quenched Ti-35.4-Nb-0.05C alloy on tanδ-temperature curve. The activation energy and pre-exponential factor of the peak are Hq=1.82±0.1 eV and τ0q=1.7×10-19±1s, respectively. The activation energy value is a little larger than that of the water-quenched Ti-35.4-Nb alloy. The peak height is decreased compared with the water-quenched Ti-35.4-Nb alloy.
Experimental Research on Isolation Vibration Effect of Engine Suspension Based on Power Flow
Authors: Sheng Peng Cheng , Liang Chun Lan , Wang Fei , Huo Zhi Yi
Published: January 2014

The acceleration and force sensors are taken as the measurement parameter,vibration power flow analysis is conducted to the data collected using MATLAB software,the results show that validity of engine suspension vibration is intuitively judged using the power flow,it is a evaluation index,moreover,it is not only convenient measurement,but also the influence of phase difference between the measured parameters to vibration isolation effect is not needed consider.
Analysis of the Effect of External Factors to the Propulsion by Inertial Centrifugal Force of Rotating Mechanism
Authors: Wang Qing Ming , Ju Jia Chen
Published: January 2014

The idea of inertial propulsion using rotating parts is always attractive, but great controversy also exists. Some researchers even completely negate this idea in principle, they think it would never be possible to create directional movement by the inertial force. Theory and experimental results show that, in certain conditions, directional movement can be realized by the internal inertia force of the device. In this paper, the influence of the friction condition between the propulsion devices which using rotating eccentric mass to generate inertia force and the external supporting surface on the effect of propulsion has been analyzed. The results show that, when there is friction between the device and the supporting surface, the rotary of eccentric mass in the device will allow the device to produce motion in a given direction; if the parameters of propulsion device (eccentric mass and eccentricity) and the rotary speed of the eccentric mass are given, the friction condition between the device and the support surface will affect the characteristics of directional motion.
Study on Failure of Pipeline due to Pressure Surge Effect
Authors: Nabudda Kriengkrai , Limtragool Jumlong , Piyasin Surasith
Published: January 2014

The pipeline transportation industry has expanded significantly because of its convenience and speed, but it faces problems. This research is to study the failure of piping caused by a water hammer which is a behavior of the check valve when the pump stops working. This causes, a loud noise and the pipe is deformed due to vibration. Therefore, this research analyzes the deformation of the pipeline due to a pressure surge and measures the vibration of the piping system when the check valve works. The resulting analysis can be used to predict the phenomenon that can cause deformation of the pipeline. The principles of fluid structure interactions using the theory of fluid and theoretical mechanics with materials engineering are used to solve problems that occur at Khon Kaen Beer in Thailand. In this research, the modeling and analysis of the piping systems uses the ANSYS program and results show the predicted failures match those in actual pipelines.
Application of TRIZ in the Innovation Design of Feeding Safety Apparatus of Hydraulic Press Brake
Authors: Li Kuo Yi
Published: January 2014

The goal of the present research is to design a feeding safety apparatus of hydraulic press brake which can solve the problems of injuries of hands of operators while processing. The research method uses the contradiction matrix of TRIZ to find out the parameters which are to be improved and prevented from deteriorating and design a feeding safety apparatus with essential safety. The principle thereof is to use the driving lever and the supporting lever to generate synchronous movements; the operators do not need to extends both hands in the back of the press break mold, but can support the sheet metals in the front or the back of the press break mold; consequently, the injuries of both hands of the operators being pressed and clipped can be prevented.
Study of Dynamic Characteristics about Controllable Vane Damp
Authors: Wang Wen Rui , Zhang Jia Ming , Nie Shuai
Published: January 2014

The characteristic of controllable vane damp is about the relationship between choke opening and damp parameter of proportional flow control valve, the relationship between the input current of electromagnet and controllable damp parameter is available after knowing the characteristics of electromagnet. This is the basic of control system design and the central dynamic characteristics of vane damp. The structure of vane damp is analyzed and the flow model is established, to provide the theoretical guidance with the design, analysis and improvement of vane damp, a simple calculating and accurate analytical method is proposed.
Research on Analysis Method of Fatigue Strength for New Type Crushing Ripper Based on the Composite Load Spectrum
Authors: Lu Feng Yi , Liu Xin Xin , Xu Ge Ning
Published: January 2014

In view of the problem that new type crushing ripper installation of tamping equipment in circulation under the action of different load working multiple cases may occur structural fatigue damage, analysis of its force characteristic, establishment ripper rack compression bending component model, according to the working condition of the most unfavorable load combinations, using the allowable stress method to calculate structural fatigue strength; the combined effect of road load spectrum and vibrating load is also taken into consideration, then statics analysis and fatigue analysis of new type crushing ripper are calculated with the finite element analysis software Ansys Workbench. The results show that theoretical calculations are in accordance with the finite element analysis results, it evidences that the fatigue strength analysis method of crushing ripper is feasible and correct. It provides a reference for the anti-fatigue optimization design of new type crushing ripper, to guarantee its meet the operational requirements under of bad conditions.
Research of Model-Constructing Method for Bulldozer Case Based on NURBS
Authors: Zhou Jian Zhao , Han Li Qun , Xu Xiao Pan , Chu Wei Jun
Published: January 2014

Using NURBS modeling method can construct more realistic and vivid 3D models, because it has a remarkable ability to control the curves of the model surface than the traditional grid modeling method. Therefore, on analysis of the primary principles of NURBS, this paper adopted professional modeling software 3DS MAX to explore the methods and techniques of NURBS in the complex surface building process. And then, the techniques and methods were applied to construct practical engineering machinery, completing the 3D model of bulldozer case.
Design and Analysis of Jujube Plantlet Uprising Machine
Authors: Wang Wei , Hu Yun Sha , Wang Xi Long , Chen Xiao Chuan
Published: January 2014

In this paper, the design of Jujube Plantlet Uprising Machine adopts plantlet uprising shovel fixed to the frame on the right side, using the three-point hitch of the tractor to adjust plantlet uprising depth, through a deep round dig depth stability limit, to take over operation, improve the efficiency of the plantlet uprising. Equipment is designed to provide technical support for a large number of high quality standardized jujube nursery, to laid the foundation calculation for large-scale jujube cultivation.
Experiment Study and Optimization of Merging Granular Flow
Authors: Yang Guo Cheng , Liu Qi Yi , Hu Mao Bin , Jiang Rui , Wu Qing Song , Wang Rui Li
Published: January 2014

Granular flow is an important process in industry, agriculture and mining. This paper studies the flow pattern and optimization of two channels of granular chute flow merging into one channel. Experiment shows that the flow pattern in each channel can be dilute flow, shock or dense flow. Base on the discovery, one can optimize the flow rate in this system.
Experimental Study of Fatigue Performance of Stay Cable Damper
Authors: Liang Dong , Li Zi Shuo
Published: January 2014

Oil dampers are widely used as a popular countermeasure to mitigate the stay cables vibration. In this study, one actual oil damper designed for some long cable-stayed was experimentally investigated to evaluate the durability. 4 million cycles loading, with frequency of 4 Hz and amplitude of 1 mm, was imposed on the damper. The excitation displacement and damping force were measured and the equivalent damping was calculated from the experimental results. The stiffness effects of dampers behaved during durability tests were also analyzed quantitatively. The test results showed that the dampers were still in good condition after 4 million cycles loading and the dampers temperatures were stable at 50 degree centigrade during the test. According to the durability test results, a model for performance deterioration of damper was proposed to predict the lifetime of oil dampers.
Dynamics Analysis of Laser Heat Assisted Variable Cross-Section Roll Forming Machine
Authors: Liu Xin , Li Qiang , Yang Zhen Feng
Published: January 2014

Considering the damping and stiffness for mechanical system of laser heat assisted variable cross-section roll forming machine, in order to obtain the angular acceleration and angular velocity of servo motor and ball screw, the kinetic equation of the system is established using the Lagrange's equations. The results are great significance in depth study and optimization of dynamics of mechanical systems.
A Design of Miniaturized High Performance Charge Amplifier
Authors: Li Li , Zhu Jia Lin , Zhang Xiao Qiong , Kang Jun , Xie Peng Sheng , Li Qiu Yang
Published: January 2014

Charge amplifier is the key component in the pre-processing circuit of the sensors. With the development of the sensor technology, the charge amplifier on the market has not been able to meet the requirement of the actual measurement. In this paper, a LF356-based charge amplifier is suitable for the conversion circuit of the polyvinylidene fluoride (PVDF) piezoelectric sensor, duing to its small volume, low power consumption and strong anti-interference. The fesibility and reliability of the charge amplifier are verified by simulating the circuit with Multisim10 and testing the hardware circuit. This charge amplifier achieves a volume of 19.32 cm3 and a bandwidth between 20kHz and 150kHz at a power consumption of 1 mW. Performance of this charge amplifier is investigated when it is connected to a standrad signal source, achieving a gain of 10 times.
Finite Element Simulation of Partical Discharge Acoustic Pressure Levels Distribution in Gas Insulated Switchgear
Authors: Xie Peng Sheng , Kang Jun , Li Qiu Yang , Zhu Jia Lin , Li Li
Published: January 2014

In this paper, we present an acoustic-structure couple interaction model of partial discharge (PD) in Gas Insulated Switchgear, the interaction between the internal acoustic source of partial discharge and structure of GIS is simulated with the finite element analysis, and the internal and external acoustic pressure levels distribution of GIS is obtained. The results based on the frequency sweep shown that the internal acoustic pressure levels is bigger than the external acoustic pressure levels of GIS in the ultrasonic frequency spectrum,it suggests that it should use the ultrasonic sensor with a broadband spectrum response to measure partial discharge in GIS, which can obtain high sensitivity. In addition, the external sound pressure of GIS is very small, and the signal of the Ultrasonic sensors must be amplified for measurement. Meanwhile, the outside acoustic pressure of the epoxy insulator is so small that it can properly judge the adjacent GIS unit partial discharge conditions.
Numerical Simulation of Controlled Rolling of Thick Slab
Authors: Feng Guang Hong , Zhang Hong Liang , Fan Jian Wen
Published: January 2014

The numerical simulation method was adopted to study the single-pass controlled rolling deformation process of the 400mm thick slab .Two forms of the rolling deformation which are uniform temperature rolling and rolling of temperature waiting under air cooling have been used to simulate the center strain changes of the thick slab. It was shown that: increasing the deformation of single-pass can significantly increase center strain of the thick slab; temperature waiting under air cooling can lead to a large temperature range between surface and center, which can increase center strain of thick slab during subsequent rolling.
The Normal Force Distribution on the Wall of the Inner Cylinder of the Power Law Fluid Flowing in the Eccentric Annuli with the Inner Cylinder Reciprocating Axially
Authors: Meng Xian Jun , Liu Hong Jian , Zhang Hong Zhi , Gao Tao , Cui Hai Qing
Published: January 2014

Based on the governing equations of the unsteady flow of the power law fluid in the eccentric annuli with the inner cylinder reciprocating axially in bipolar coordinate system, the calculation formulae of normal force distribution on the wall of the inner cylinder of the power law fluid flowing in the eccentric annuli with the inner cylinder reciprocating axially in the bipolar coordinate system were established,and the relevant numerical calculation method was given.Taking the aqueous solution of partially hydrolyzed polyacrylamides (HPAM) for examples,the normal force distribution were calculated by using the calculation formulae and numerical calculation method mentioned above, the curves of the normal force distribution on the wall of the inner cylinder of HPAM aqueous solution were plotted and the effects on the normal force distribution of the flow behavior index of the power law fluid, the stroke and the stroke frequency of the inner cylinder were analyzed.
Natural Heat Convection Analysis on Cylindrical Al Slug of LED
Authors: Vairavan Rajendaran , Sauli Zaliman , Retnasamy Vithyacharan , Khalid Nazuhusna , Anwar K. , Abdullah Nooraihan
Published: January 2014

This paper presents the characterization of a single chip high power LED package through simulation. Ansys version 11 was used for the simulation. The characterization of the LED package with aluminum cylindrical heat slug was carried out under natural convection condition at ambient temperature of 25°C. The junction temperature and the stress of the LED chip was assesed. The LED chip was powered with input power of 0.1 W and 1 W and the heat dissipation was assesed. Results showed that that the junction temperature and the Von Mises Stress of the single chip LED package increases with the increased input power.
Investigation on Acoustic Emission Characteristics from Corrosion of Conventional Materials of Primary Pipe in Nuclear Power Plants
Authors: Chai Meng Yu , Li Li Chan , Bai Wen Jie , Duan Quan
Published: January 2014

304 stainless steel and 316L stainless steel are conventional materials of primary pipeline in nuclear power plants. The present work is to summarize the acoustic emission (AE) characteristics in the process of pitting corrosion of 304 stainless steel, intergranular corrosion of 316L stainless steel and weldments of 316L stainless steel. The work also discussed the current shortcomings and problems of research. At last we proposed the coming possible research topics and directions.
3D Shape Measurement and Reconstruction Using Fringe Projection
Authors: Sauli Zaliman , Retnasamy Vithyacharan , Nadzri Nor Shakirina , Veriven Christopher John
Published: January 2014

Digital fringe projection technique using phase shifting method has been studied extensively for generatingthree dimensional (3D) surface information. The aim of this paper is to develop a simple automated optical inspection (AOI) system using fringe projection technique to capture image of an object. A three step phase shifting is used to generate the saw tooth image to retrieve the information of the pixel coordinate and surface dimension. The calibration of the camera and projector is observed to contribute a great significant on the measurement accuracy. The developed system is capable to measure the object surface dimension and perform the 3D reconstruction with high speed and good precision.
Principle and Application of Complex Surfaces Expand
Authors: Deng Li , Wang Li Zhong , Yu De Hong
Published: January 2014

Based on triangulation plane parametric method, the in-depth research of the complex surface flattening system has been attempted. The required database system of complex surface flattening algorithm is established. An attached LSCM algorithm is realized. To be continued, with a proposed initial parametric network, the auxiliary program is constructed with higher accuracy. A friendly interface in VB was finished and a complex surface flattening system is realized with Solidworks secondary development technology based on SolidworksAPI interfacing.
Development of Acoustic Emission Sensor Based on the 0-3 PZT/P(VDF-TFE) Piezoelectric Composite
Authors: Kang Jun , Xie Peng Sheng , Li Yuan , Zhu Jia Lin , Li Li
Published: January 2014

In this paper, we produced the 0-3 PZT/P(VDF-TFE) piezoelectric composite film with 80μm thickness using PZT piezoelectric ceramics and fluorine resin P(VDF-TFE) by weight 85/15 ingredients through the hot rolling machine and corona-discharge method. A sensor with 4cm×1.3cm area is designed and produced by using this film. We have carried out the breaking of a pencil lead pressed against an aluminum plate acoustic emission testing. The result shown that the sensor is with fast response and high sensitivity advantage, the sensor can be used as acoustic emission sensor. Meanwhile the sensor is very easy to use due to it is a soft film sensor.
Analog Control of Continuous Copper Wire Annealing Based on Temperature Detecting
Authors: Lin Yong Zhong , Xu Xue Jun , Sun Hong Yang , Lu Zuan Zhen , Wang Cheng Gang
Published: January 2014

The paper acquires the equivalent relation between the velocity of wires and annealing temperature through deduction, based on the measurement of the annealing temperature. A controller characterizing annealing temperature could be inserted before the traditional PI annealing controller, so that annealing temperature could be controlled while the annealing temperature deviation is simulated by the error of the velocity of wires. In the paper, a kind of analog circuit is chosen to achieve the equivalent relation between the velocity of wires and annealing temperature by linear fitting under the condition of preciseness.
Trajectory Generation for Glazing Spray Gun Based on STL Model
Authors: Pan Hai Peng , Feng Hao , Cao Li Gang
Published: January 2014

Glazing is a key procedure in ceramic product surface decorating processing. Recently, robots are gradually utilized to fulfill the glazing work instead of manual work. However, the researches on freeform surface glazing technology lag behind the research on robotics technology, thus limits the application of glazing robot in ceramic industry. In order to improve the quality and efficiency of robot glazing, this paper presents a new method which is base on STL model to generate trajectory for glazing spray gun. The whole procedures of this method have been discussed explicitly.
The Design of a New Small Simple 6-Axis Robot Arm
Authors: Kang Cun Feng , Li Shu Jin
Published: January 2014

This paper elaborate a design of a new small simple 6-axis robot arm. The design not only can verify the 6-axis motion algorithm, but also have a better property of the economy and the easy-handing. In the mechanical aspect, using the connection method of the single aluminum plate reduce the load effectively. In the control aspect, using stepper motor driven system reduce the cost. This design has a high application value in the process of mechanical arm development.
Analysis of Steering Control Strategy on Tractor's Hydraulic Steering By-Wire System
Authors: Lu Zhi Xiong , Chang Jiang Xue , Bai Xue Feng , Lu Yang , Wu Jun Gan
Published: January 2014

The structure and working principle of the hydraulic steering by-wire system were described, and the optimal control algorithm of the system was obtained by the comparative analysis. Fuzzy control was chosen as the steering systems control algorithm, and it can realize closed-loop control of the front wheel corner. Matlab/Simulink was used for the simulation of the entire system. The simulation got the fuel tank displacements response curve, and verified the accuracy of the system design, which can provide a reference to the design of tractors steering system. Bench test was proposed to verify the accuracy of the system. The bench test results showed that the hydraulic steering by-wire controller can realize systems steering function well, and the system improved the control accuracy and fast response characteristics.
On Inspection Strategy Based on Sample Inspection Reliability
Authors: Shen Wei Guo , Zhao Xin Tong , Han Jun Wei
Published: January 2014

As we all known, for a certain product, inspection reliability for the product can be considered and calculated by a famous reliability index as POD (Probability of Detection). While, for a batch of product, Stat. character should be added into POD because one-by-one inspection always is not economic, and POD without any consideration of Stat. character is not used directly for inspection reliability of a batch of product. So, inspection reliability for a batch of products can be considered and divided into reliability of inspecting objective (could be defined as POD) and reliability induced by sample inspection (Rs). In this present paper, inspection strategy based on sample inspection reliability is considered, together with some factors influent to Rs is analyzed such as sample size, producer risk and consumer risk, acceptable quality level (AQL), rejectable quality level (RQL).