bluuebunny/crossref_metadata_2025 huggingface dataset:
Theory Research on Full Metal Single Screw Pump
Authors: Yu Ben Liang , Wu Jun Fei , Yu Ying
Published: August 2013

This paper first studied the feasibility in application and advantages of the the full metal single screw pump by the method of theoretical research . Then the paper deducted the motion characteristics of the rotor around the stator and flow rate of the metal single screw pump .It is pointed that the center of the rotor profile is always located in the long shaft of the section of stator in any section .As the rotor rotates, the center of the rotor profile on this section takes straight reciprocating motion along the long axis of stator section .The results indicate that it exists feasibility in the designing and processing of full metal single screw pump. Thereby it provides theoretical basis for the application of full metal screw pump.
Interference Mechanism on NO2 Concentration by the Multidispersion Soot Using NDIR
Authors: Zhao Yan Jun , Cheng Shou Guang , Qu Bin
Published: August 2013

NDIR is one of the important NO2 concentration measurement methods. The NO2 concentration can be figured out through measuring the light intensity attenuation. But the scattering and absorption of the multidispersion soot particles can attenuate the light intensity, so the infrared measurement light intensity attenuation is larger and the concentration is increased. The interference on the NO2 concentration caused by the multidispersion soot particles is discussed in the paper. The dissipativity, concentration, average size, size distribution parameters and the scattering light angle range of the multidispersion soot particles can interference the NO2 concentration. The method to reduce the interference is brought out and the NO2 concentration measurement accuracy is improved.
The Material Discontinuous Zone Influence on the Behavior of Crack Propagation in the Matrix Material
Authors: Sun Zhi Jia , Li You Tang
Published: August 2013

A numerical method to simulate the crack propagation is presented in this paper. The FEM is used to estimate the influence of the material discontinuous zone on the propagation behavior of the crack placed in close to it in the matrix. The crack propagation paths in the matrix with different material discontinuous zone are simulated. The simulation results show that the crack propagation path will deviate toward the material discontinuous zone when the crack grows in closed to it and the property of the material discontinuous zone influences the deflection angle and the crack propagation rate.
Application of ANN Back-Propagation for Fracture Design Parameters of Middle Carbon Steel in Extra-Low Cycle Bend Torsion Loading
Authors: Duan Hong Yan , Li You Tang , Sun Zhi Jia , Zhang Yang Yang
Published: August 2013

The fracture problems of medium carbon steel (MCS) under extra-low cycle bend torsion loading were studied using artificial neural networks (ANN) in this paper. The training data were used in the formation of training set of ANN. The ANN model exhibited excellent comparison with the experimental results. It was concluded that predicted fracture design parameters by the trained neural network model seem more reasonable compared to approximate methods. It is possible to claim that, ANN is fairly promising prediction technique if properly used. Training ANN model was introduced at first. And then the Training data for the development of the neural network model was obtained from the experiments. The input parameters, notch depth and tip radius of the notch, and the output, the cycle times of fracture were used during the network training. The neural network architecture is designed. The ANN model was developed using back propagation architecture with three layers jump connections, where every layer was connected or linked to every previous layer. The number of hidden neurons was determined according to special formula. The performance of system is summarized at last. In order to facilitate the comparisons of predicted values, the error evaluation and mean relative error are obtained. The result show that the training model has good performance, and the experimental data and predicted data from ANN are in good coherence.
Optimum Design of Curvilinear Stiffened Panels with Stiffening Beams
Authors: Yang Jun Bo , Song Bi Feng , Zhong Xiao Ping
Published: August 2013

The paper presents a framework for design and optimization of curvilinear stiffened panels with any cross-section shape of stiffener. Within this framework, the weight of stiffened panel applied complex loads, is minimized under the constraints of structural responses include global buckling, maximum stress and crippling. Then, a stiffened panel with two blade curvilinear stiffeners is optimized using this framework, and the optimum performs better than another existing design. Finally, it is concluded that stiffening beam is suitable for simulate stiffener sustains part of applied load directly.
Research Progress in Mechanics of Hollow Section RC Bridge Piers Subjected to Seismic Dynamic Load
Authors: Zhao Yan , Gu Jie , Wu Hui Ge
Published: August 2013

The seismic performance of the bridge piers is a basic study in seismic analysis of bridges. Hollow section piers have high bending strength and stiffness, as well as reduced amount of reinforced concrete needed and thus good economic returns, which have been widely applied in the high-pier, large-span bridges in high-intensity area of western China. Current study status and future development trends about the seismic behavior of hollow section reinforced concrete piers were presented. The necessity of carrying out seismic performance studies of hollow section reinforced concrete bridge piers was also pointed out.
Elastic-Plastic Deformation of Milling Thin Wall Part
Authors: Tang Ai Jun , Ma Hai Long , Liu Zhan Qiang
Published: August 2013

Aircraft components are mostly made by aluminum alloy as thin wall types. These parts are usually end milled to required thicknesses and tight tolerances in specific areas. The thin wall parts are difficult to machine because they are easy to vibrate and deformed due to their lower rigidity. This paper proposes a new elastic-plastic deformation model which is suitable for prediction of machining deformations of end milled thin wall parts. The theoretical deformation model is established on the basis of the equations of Von Kármán. The part deformations are simulated using FE analysis and Matlab. The results show that the deformations for the end milling of thin wall parts can be captured with very high accuracy using the proposed elastic-plastic deformation prediction model.
Numerical Computation Studies and Hydrodynamic Analysis on the Cutting-Carrying and Lifting Capacity of Spiral Centralizer in Gas Drilling
Authors: Chen Zheng Mao , Xu Hong Lin , Xiong Ji You
Published: August 2013

For gas drilling, hole cleaning is a particularly critical problem. When the spiral centralizer is used in the down hole assembly of gas drilling, it will produce a powerful rotational flow which will be bond to have the influence of different level on the hole cleaning. For this matter, this paper has established a three-dimensional fluid dynamics model in the basis of gas-solid two-phase turbulent theory and got its numerical solution by using the finite volume method, therefore making a quantitative evaluation about the ability of cutting-carrying and lifting of the spiral centralizer. The results have shown that the spiral centralizer has the function of cutting-carrying and lifting; part of the rock debris pellet concentrates in the bottom of the blade, above less instead. The numerical calculation method has some guiding significance for spiral centralizer design in gas drilling.
Research on Fluid Mechanics with the Finite Analytic/Grid Method for Two-Phase Turbulence Based on PDF Theory
Authors: Ye Wei Wei , Xu Jiang Rong , Hu Su Juan , Tian Ying
Published: August 2013

in this paper, a finite analysis/grid method for high-dimensional PDF equation of fluid mechanics of two phase flow is proposed. The particle high-dimensional scalar PDF transport equation in position-velocity phase space is reduced to velocity phase space and position phase space. An analytical solution of the particle velocity PDF is obtained by Fokker-Planck techniques, the particle position PDF is solved by finite difference method, which determines the distribution of particles in two-phase flow. It is shown that the Finite Analytic/Grid method can simulate the two-phase flow very efficiently.
Fluid Dynamic Simulation of a Wall-Jet-Flow Loaded with Solid Particles Using the Finite Analytic/Grid Method of PDF Model
Authors: Tian Ying , Xu Jiang Rong , Hu Su Juan , Ye Wei Wei
Published: August 2013

In this paper, a classical wall-jet-flow loaded with particles is simulated by the finite analysis /grid method using the particle PDF transport equation, as well as by the finite analysis / particle method, and then the simulation results ​​obtained by the two methods are compared with the experimental results. It is shown that the finite analysis/grid method is effective for the prediction of the particle flow.
Numerical Simulation of Filling Process in Casting Based on a Hybrid Lattice Boltzmann and Particle Level Set Model
Authors: Yu Yang , Chen Li , Lu Jian Hua , Hou Guo Xiang
Published: August 2013

Free-surface phenomena play an important role in many engineering applications, such as filling process in casting, etching process and so on. As we know, level set kind method is more accurate than Volume of Fluid kind method. In this paper, we implement a hybrid lattice Boltzmann and particle level set method to simulate filling processes in a 2D cavity. Results obtained by the hybrid lattice Boltzmann and particle level set method show the same filling pattern with other methods in two different Reynolds numbers.
The Implement of CANopen in Motion Control of Electric Vehicle
Authors: Yan Wei , Yao Wei
Published: August 2013

Considering the bad electromagnetic environment of electric vehicle, a stable communication system is necessary. Because of its unique stability, CAN bus has been widely used in the field of automotive electronics. CANopen is a higher layer protocol of CAN bus, it has the advantages of conciseness and open-source. In this passage, based on sub-protocol DS301 and DS402, the implement of CANopen in motion control is introduced. The establishment of object dictionary and motor application object is the main content in this article.
GARCHSK Based Risk Assessment in Electric Power Industry
Authors: Wang Rui Qing , Xiao Zi Qian
Published: August 2013

The restructuring/deregulation in electric power industry has heightened the importance of risk assessment. A model to estimate value-at-risk via GARCHSK specification is proposed, in which the seasonalities, heteroscedasticities, skewnesses, kurtosises and relationship to system loads are jointly addressed. The impacts of probability distribution assumption for innovations on value-at-risk estimate validation are analyzed for three distributions: normal, student-t and Gram-Charlier series expansion of the normal density function. The numerical example shows that the proposed model performs better in predicting one-period-ahead VaR.
Study on the Sustainable Development Evaluation of Logistics Enterprise for Industry Manufacturing Based on Data Envelopment Analysis
Authors: Li Shu Lin
Published: August 2013

Logistics is an important part in social reproduction; it not only has the physical recycling and energy conversion, but also involves value transfer and value realization. Besides, the logistics involved the economic system and ecological environment system. With resource constraints and environmental problems have become more serious; the sustainable development of logistics enterprise for industry manufacturing has become the focus of the academic community. Based on the concept of sustainable development and data envelopment analysis model, this paper constructs the evaluation index system of sustainable development for logistics enterprise for industry manufacturing, and clears the application process of the model according to the characteristics of its logistics enterprise for industry manufacturing.
Research on Mechanical Operation with Sequencing Optimization of Arrival Aircraft in Terminal Area
Authors: Liao Yong , Zhai Na
Published: August 2013

In order to ensure flight safety and efficiently sequence arrival aircrafts in terminal area, a sequencing model for scheduling the sequence of arrival aircrafts in the terminal area was discussed. Model's objective is minimizing the loss of delays due to meeting separation which is used to keep the safety of aircrafts before and afterwards. Then the model is transferred to pure integer nonlinear program model so that the model can be solved by some program software like Lingo. At last, a numerical example is used to illustrate the process of solving the model. The numerical example shows that the model proposed in this paper is extremely efficient in scheduling the sequence of arrival flights compared with the FCFS (first come first served) algorithm and model used for the aircraft sequencing in the terminal area is feasible.
Online Scheduling with Incompatible Job Families on Batch Processing Machine(s)
Authors: Liu Li Li
Published: August 2013

This paper considers online scheduling with incompatible job families on single batch processing machine and parallel batchprocessing machines. Online algorithm is developed and the performance ratio of the algorithm is analyzed for the problem under consideration, respectively.
Research on Mechanical Design with Beidou GPS Navigation Antenna Design Terminal
Authors: Chen Guo Zhi , Chen Guo Tong , Sun Jian , Miao Jing
Published: August 2013

With advances in technology and machinery manufacturing technology, the satellite navigation system plays a more and more important role in the modern society. People demand increasingly for satellite navigation. Satellite navigation is increasingly used in military systems, so military and civilian value is higher and higher. For the satellite signal reception, microstrip antenna plays an indispensable role. As the mechanical design of microstrip antenna is simple, easy manufacture, low cost, smaller size, lighter weight, with the overall unity of active devices and integrated circuit, etc. The successful development of high dielectric constant ceramic material enables the area of microstrip antenna to narrow several times. Microwave dielectric ceramics material has some merits such as high dielectric constant, thermal stability and excellent characteristics of small dielectric loss. Different dielectric constant substrate can be prepared through changing and doping modification of process parameters, including the relative dielectric constant of microwave dielectric ceramics for more than a few dozens which can be used for different microwave frequencies. Those are important reasons for promoting the development of microstrip antenna.
Research on Development Potential of the New Energy Industry Based on Fuzzy Comprehensive Evaluation
Authors: Yang Shao Mei
Published: August 2013

This paper introduced the related concepts of new energy industry development potential evaluation, established the evaluation index system. This paper determined its evaluation indexes weights utilizing delphi-method, and then evaluated the new energy industry development potential of Baoding using the fuzzy comprehensive evaluation method. Evaluation results show that the city new energy industry have a good growth potential. The example results show that the models commonality is very good.
New Technology and Mechanism Study of the Bearing Enhancement of Broken Rock Zone in Underground Rock Roadway
Authors: Hao Peng Wei , Dong Hai Long , Liu Zhao Hui , Li Jing Pei , Jing Lai Wang
Published: August 2013

Treating surrounding rock as absolutely loose mass helps to determine positions of the four key reinforced points in roadway, in other words, they are juncture locations between 45 degrees angle directions of two arch haunches and two footwalls. Surrounding rock deformation can be effectively controlled with the help of reinforcement on key reinforced points, furthermore, it is possible to save lots of supporting materials, in short, it is a very effect way. New technology proposed in this paper what is about stable augmentation has deeply unearthed important effect of anchor in floor of roadway, it argues that anchor in floor has quadruplex efficacies: transferable effect of surrounding rock stress, displacement boundary effect, decreasing equivalent stress of basic angle area and the inverted wedge effect, so it can suppress floor heave effectively, and this lays a solid foundation for roadway stability. Article deeply analyzed basic mechanism about deformation of roadway under loading, exposed essentiality of roadway support, and provided important theoretical basis for floor heave control emerged more and more frequently in deep mine roadway.
Key words: broken rock zone, bolt support, floor heave, equivalent stress
Simulation and Analysis for the Rocket Gas Flow Field Based on Mechanical Mechanics and Mechanical Properties
Authors: Zhang Yang , Jiang Yi , Dong Xiao Tong
Published: August 2013

Gas jet of the rocket on the launch environment has serious gas shock effects, bursts of rocket impact will be greater and greater harm. This article take the numerical methods for simulation, analog transmission process gas stream flow, and finally calculate the pressure and temperature of the emitting device impingement flow field and the maximum absolute pressure and temperature, and ultimately determine gas impact of the danger zone of the flow field.
Study on Bicycle Manufacturing Engineering with the Quality Detection Device for the Carbon Fiber Sports Bicycle
Authors: Liu Pei Hua , Zhang Yun Bo
Published: August 2013

In order to realize light weight, high strength, anti-fatigue for sports bicycle, carbon fiber was used as a predominant material of high-grade sports bicycle. The manufacturing engineering with quality detection device was studied to ensure manufacturing quality and riding safety of carbon fiber sports bicycle.The hydraulic servo control system and modular fixtures were developed in this paper, the former can realize double close-loop control and improve testing accuracy of the device, the latter can realize that a variety of works can be tested on the same testing bench and improve testing efficiency of the device.
The Simulation Research on Air Drag Reduction of Tail Dome on Vans
Authors: Cao Li Feng , Xie Xiao Peng , Zeng Jian Hao , Huang Heng
Published: August 2013

In this paper, three different types of tail domes were designed based on the mechanism of reducing pressure drag between the front and rear of vans, and it takes the van without a dome as a comparison to discuss the drag reduction effects of three different sizes. The three-dimensional model of the van is established in PRO/E, and the pressure and velocity distribution of the van model were analyzed in Fluent; In addition, the wind resistance test of the van model is proceed in the variable speed motor wind resistance simulation test device. The results of CFD simulation have good consistency with the experimental test results, and it verifies the conclusion that the tail dome is good for drag reduction. It provides basis and reference for the optimization of drag reduction for the vans.
Digital Research on Oblique Cutting Parameters of Round Broach
Authors: Wang Ya , Chen Song , Wang Min
Published: August 2013

In recently years, researches about round-hole broaching mainly focus on broach macro environment and industry structure. However, researchers study little from technical level. We aim at simplifying broaching process of worm gear round broach into rectangular and oblique cutting process. In the same conditions, we make use of finite element analysis software for stress analysis of two kinds of cutting mode broach, to provide a certain theoretical basis for using tool reasonably and tool parameters optimization design in the production.
Research of Mechanical System on Rotary Steering Drilling Tool
Authors: Yan Wen Hui , Peng Yong , Zhang Shao Huai , Wu Heng
Published: August 2013

The paper introduces rotary steering drilling tool developed by authors' research group in detail. The tool is composed of four modules of the power, measurement, control and executive mechanism. The composition and detailed mechanical structure of stable platform section and executive mechanism have been revealed. The main units and field test in the process of research have been introduced briefly, including disc valve friction in executive mechanism, test device for back up plate force, indoor synthesis waterpower test and field test of the tool. Key difficulties of design, machining, install and field test in research has been summarized. The tool has realized drilling function, and has been developed better for industrialized application.
Reliability Research on Measurement System for Downhole Storage Pressure Gauge
Authors: Wu Heng , Peng Yong , Wang Li Ping
Published: August 2013

Downhole storage pressure gauge should meet the requirements of high strength, high temperature resistance, vibration resistance, and high reliability when hydraulic fracturing. Downhole storage pressure gauge has been designed. Based on the working principle, the logic diagram for reliable analysis has been built, which has been connected by five units in series. With the modules of electronic component and integrated circuit, the operating failure rates of the five units have been calculated. The reliability and Mean Time Between Failure of downhole storage pressure gauge have been obtained. The high reliability of the downhole storage pressure gauge can satisfy the measuring demand for pressure and temperature when hydraulic fracturing.
Research on Decision Support System of Relay Protection Equipment Status Evaluation Based on Mechanical Overhaul
Authors: Zhou Yu Tian , Wu Yun , Zuo Tong
Published: August 2013

Periodic mechanical overhaul is the most common model for relay protection equipments in power systems of the country. Over-treatment for minor illness or unnecessary treatment for disease-free of relay protection device that didnt need an overhaul would be arose by this model, which caused resource wastes and reduced the availability factor. The paper aims at evaluating and classifying the relay protection equipments, building centesimal evaluation model and prescient mechanical checkout model, as well as improving reliability of electricity grids by building condition-based maintenance, evaluation, decision and support systems of relay protection equipments.
Accurate Calculation about Euler Critical Force of Multistep Telescopic Cylinder with Two Different Kinds Support Conditions
Authors: Du Liang , Lan Peng , Lu Nian Li
Published: August 2013

Variable cross-section telescopic cylinder is the frenquently-used member being loaded, which the buckling critical force is variable as the boundary and load condition changed. According to two common boundary supprot conditions, this paper established the deflection differential equations of arbitrary multistep telescopic boom by vertical and horizontal bending theory with second-order effect, introduced the boundary condition and deformation compatibility condition, obtained the recurrence expression of buckling characteristic equations, and some practical applications were presented. Took certain four-sectioned telescopic cylinder as example, calculated the buckling critical force by the method and compared the results with ANSYS, the accuracy of the buckling characteristic equations deduced in this paper were verified.
Study on Aircraft Mechanics with Accessibility Appraisement of Aviation Equipment Based on Correlation Analysis Method
Authors: Gan Xu Sheng , Duanmu Jing Shun , Gao Jian Guo
Published: August 2013

Accessibility is an important criterion that reflects the quality of aviation equipment maintenance, especially prominent to maintenance time. To obtain the better accessibility for maintenance efficiency and reducing maintenance costs, it is necessary to choose an optimal scheme in many accessibility designs. This requires the comprehensive appraisement for the parts accessibility of the entire functional system. This paper introduces the correlation analysis method to appraise the accessibility, and propose the mathematical model of the appraisement, which has practical application value to improve the maintenance of aviation equipment.
Compressing Equipment Control Method of Horizontal Preloading Domestic Waste Disposal Transfer Station and its Implementation
Authors: Zhou Hui , Li Gang Yan , Bao Han Wei , Sun Jiu Qiang
Published: August 2013

The serious shortage of domestic waste disposal facilities and the level lower of domestic waste disposal have had an important effect on the quality of the urban environment and urban sustainable development. In this paper, control function requirement and method are proposed by analyzing the process of horizontal preloading domestic waste transfer station. With PLC technology and configuration-monitoring technology, the hardware and software of domestic waste compressing equipment control system are developed. In order to achieve different simulation test, a test method of using configuration software script language is proposed.
The Digging Shovel of Corn Stubble Shop Machine Design and the Performance of Drag Reduction Test
Authors: Ge Yi Yuan , Wang Jun Fa , Ma Liu Xuan , Shao Dong Wei
Published: August 2013

As for the crops root stubble having the developed root system, the digging shovel with drag reduction has been designed for reducing disturbance to soil generated by soil-engaging components and decreasing power consumption. Drag reduction performance test of the offset mining shovels is developed with the method of orthogonal rotation combination test design, law and importance degree of the four critical factors’ influence on traction resistance has been found, including shovel buried angle, slip cutaway, buried depth, and machine forward speed. Then the mathematical model of traction resistance is developed and the optimum parameters for digging shovel resistance are received.
Simulation of Three-Phase Motor Rotor Flux Oriented Control System Based on SVPWM
Authors: Hu Ying Zhan , Feng Shuo
Published: August 2013

In order to improve the control result of three-phase motor with power supplied by battery, it uses voltage vector control technology to control the three-phase motor excitation current and the torque current respectively. At the same time, according to the principle of rotor flux oriented, it get the aim of measuring and controlling the vector of three-phase motor stator current. The research on the way of achieving the algorithm of the voltage space vector pulse width modulation is detailed introduced. By building the simulating model of three-phase asynchronous motor, it simulates the algorithm. As a result, it shows that the algorithm is reasonable, the control performance is better and application requirements of control for three-phase asynchronous motor with power supplied by battery is satisfied.
The Study on Continuous Blood Pressure Information Based on the Pulse Characteristic Parameters
Authors: Wu Duan , Yang Cheng Zhi , Li Qiang , Jin Huang , Sun Hao
Published: August 2013

Using the pressure sensor to extract the signal of human brachial artery pulse wave, a method of noninvasive and continuous measurement of blood pressure is realized by estimating the blood pressure of each pulse action based on the relevant characteristics of the pulse wave. The results of multiple stepwise regression analysis and blood pressure modeling show that the blood pressure measured by this method has a good consistency with that measured by mercury sphygmomanometer. And this method has very good application prospect in clinical and medical research.
Segmentation of Target Nuclei in Parkinson's Disease Based on Fuzzy Connectedness
Authors: Xue Yan Qing , Yang Chun Lan , Wu Shui Cai , Gao Hong Jian , Lu Wang Sheng
Published: August 2013

With the development of nerve stereotactic technology, brain stereotactic surgery has become an effective method for the current treatment of Parkinson's disease. The accurate localization of the target nuclei is the key issue of the treatment. In this paper, we constructed a dependence tree model to identify the target nuclei further. Theory of fuzzy connectedness was used in the segmentation. Experimental results show it was more desirable and suitable to the clinical applications.
The Research of Clock Traffic Congestion Model and Synchronization Technology
Authors: Liu Bai Fen , Gao Ying
Published: August 2013

Considering the limited bandwidth, delay and the flow of mutual association, the greater the flow, the delay lags the more obvious; when flow close to saturation, delay will become very serious. According to the PTP local clock offset correction mechanism; this paper proposed an adaptive routing algorithm based on through node flow congestion forecast message. The method based on least squares support vector machine on the discharge time series online regression estimate future period of time clock node network flow value, from this investigation clock node congestion degree index, so the choice of adaptability PTP since the minimum delay routing, improve the synchronous message delivery success rate, reduce the complex network of synchronous accuracy vulnerable data flow congestion hysteresis effect.
New Construction Materials Based on Automobile Construction Sludge
Authors: Mymrin Vsévolod A. , Catai Rodrigo E. , Zelinskaya Elena V. , Tolmacheva Natalia A.
Published: August 2013

This paper is devoted to the development of valuable new construction materials based on various ecologically burdensome galvanic wastes, namely industrial sludge from the RENAULT plant and metal cleaning glass waste. The only natural component used is local clay. Both of the wastes need significant financial investment and efforts for neutralization and subsequent disposal while they can be recycled into glass-ceramics or red ceramics (tiles, bricks, blocks, etc.). Mechanical properties of the ceramics of various compositions are as follows: flexion resistances are 4.8-9.2, 7.6-11.5 and 11.1-14.9 MPa (after calcination at 800°C, 850°C and 900°C, respectively); the dilatation coefficient values are normally 6.6 to 9.5% (up to 10% for certain materials); the water absorption values are between 19.7 and 23.9%. These values meet the Brazilian standards for ceramics production. Physicochemical interactions of initial components and new materials structure formation processes have been studied. The XRD data show the formation of new minerals in the process of baking: Na-Anortite (Ca,Na)(Si,Al)4O8, Thenardite Na2SO4, Mullite Al6Si2O13, Tamarugite NaAl (SO4)2 6H2O. Only two minerals are identified both before and after baking: Quartz SiO2 and Hematite Fe2O3. High X-ray background clearly visible on the XRD-pattern is an evidence of a highly amorphous glassy structure resulting from founding processes during the mixtures heating. The SEM and EDS studies of the ceramics strongly confirm the XRD results demonstrating fields of almost glassy morphology within the new material. These new-crystalline and new-amorphous structures can explain all the mechanical and chemical properties of the ceramic materials developed. Leaching and solubility studies of the new ceramics with Atom Absorption Analysis demonstrate that a great excess of heavy metals (Sn, Zn and Ni) from the industrial wastes is decreased in the baked ceramics achieving levels that meet Brazilian sanitary standards.
Resistance Switching in Metal Oxide Thin Films and its Memory Application
Authors: Kundozerova Tatyana , Stefanovich Genrikch
Published: August 2013

We explore the unipolar resistance switching effect in sandwich structures based on Nb, Ta and Zr oxide thin films. The structures were fabricated by pulsed laser deposition and low temperature anodic oxidation methods. After electroforming process memory cells demonstrate reproducible switching between low and high resistance states with a resistance ratio around 102. Nonvolatile resistance storage was traced within 40 days. The low-temperature anodic oxidation of Nb was found to be suitable to fabricate flexible nonvolatile memory elements. The parameters of resistive switching are not degraded after 100000 flexing.
The Development of Intelligent Mobile Phone Game Based on Android System
Authors: Shi Yi Ping , Wang Hong
Published: August 2013

Based on the snake game, this paper introduces the software development process of the intelligent mobile phone game on Android platform. The software development of intelligent mobile phone game has important significance for developers to set their own special products conveniently, to reduce the cost of development and to meet the demand of growing mobile customer.
Investigation on Silicon V-Grooves Measurement with Spectral Domain Optical Coherence Tomography (SDOCT)
Authors: Chen Yu Ping , Qin Yu Wei
Published: August 2013

The objective of this research was to investigate a new detection method for testing a MEMS V-shaped groove in silicon using spectral domain optical coherence tomography (SDOCT) technique with a thermal light source where the V-groove depth, width and bottom width were measured. The SD-OCT technique with non-contact operation and acquisition rate advantage made it suitable for on-line precision measurement of V-shaped grooves in silicon.
Design and Implementation of USB-Based Microwave Power Sensor
Authors: Zhao Hao , Dong Zhan Yong
Published: August 2013

According to the limitations of desk microwave power measurement instruments used in system setup and product line field, a brand new minisize power measurement design based on USB interface is proposed. Firstly, the design principles of analog channel, digital signal processing and the USB interface for the power sensor is introduced. Then the design fundamental of the USB communication to the host is presented. The vivid implementation of the software on the DSP, USB firmware and the PC host is fully discussed. This design features small size, light weight and programmable USB interface, which supports the Interchangeable Virtual Instruments (IVI) driver and thus simplifies the program procedure. The PC based platform allows for lower cost than traditional power meters and power sensors, and with a laptop PC it is ideal for field portable power measurement and remote multi-channel monitoring applications using all kinds of USB hubs.
The Feasibility Study of Vibration Transmissibility Applied to Structure Damage Identification
Authors: Wu Sen , Wang Bin , Zhang Hai Hua
Published: August 2013

In view of the defects of the traditional damage identification method based on vibration,the damage identification method based on vibration transmissibility is put forward. The feasibility of the vibration transmissibility applied to structural damage identification is analyzed by the numerical simulation experiment of a cantilever beam, the analysis results show that, vibration transmissibility contains the structure damage severity, damage location and other useful information, and all the information is favor of the damage identification.
Literature Review of the Application of Audio Testing Software to Chinese Musicology
Authors: Feng Lina
Published: August 2013

In this paper, the extensive application of audio testing software to Chinese musicology was reviewed. New audio testing software developed by Chinese musicologists include DEAM and GMAS , which along with imported audio testing software such as Solo Explore 1.0, Speech Analyzer3.0.1 have been widely applied by Chinese musicologists to ethnomusicology, archeology of music, folk music as well as musical entertainment. With the support of audio testing software, Chinese musicology has made much progress.
Research on Critical Factors in Simulation of Radar Decoying System
Authors: Fan Zhen Qin , Ma Yan Heng , Dong Jian , Chen Xing Kai , Song Yao
Published: August 2013

Decoying technology is an effective mean to antagonize anti-radiation missile. Building models and simulation has become a necessary way to study the effect of decoying system. Realization of decoying principal and arrangement of critical factors influence the decoying effect directly. Definition of critical resolution angle and principal of choosing radiation source are analyzed to study their influence on decoying effect. They are also redefined in this paper. Models are built and simulated to study critical resolution angle and overload coefficient influence on decoying effect. And their relationships with decoying success rate are acquired in the end.
Simulation of Mechanical Properties of Aluminum Based on Micro Model
Authors: Wang Hai Dong , Liu Xu , Bian Gui Xue , Xu Li , Zhao Shi
Published: August 2013

Elastic constants of purity and containing impurity metal aluminum were calculated, and the effects of impurity on the elastic constants were also studied. The effect of particle on micro-stress concentration and debonded stress of inclusion was researched. The mechanical relationship between the grains was defined by relationship of displacement and driving force in cohesion zone model (CZM).The method can be extended to research mechanical properties of other metals and alloys structures.
Effect of Mg on the Synthesis of TiB2 Powder by a Self-Propagating High-Temperature Synthesis Technique
Authors: Li Su , Li Jun Shou , Zhao Fang , Ye Ming Hui
Published: August 2013

Micro-nanoTiB2 ceramic was prepared through increasing the molar ratio of Mg and leaching with suitable acid by the combustion synthesis reaction of Mg, TiO2 and B2O3, which could get higher temperature and purer product. The Samples were investigated by XRD and SEM, and the results showed the diameter of the TiB2 was 200 nm ~ 300 nm and the shape of the TiB2 was irregular hexagonal crystal. The diameter of the TiB2 was decreased with the increase of Mg powder. The formation mechanism of TiB2 has been studied.
Study on Influence of the Load Path on Formability of Variable Cross-Section Y-Shaped Tube Hydroforming
Authors: Zhang Hai Ying , Bai Ling , Zhang Guo Jun , Mao Rui , Liu Wen
Published: August 2013

Based on the analysis of now available evaluation indexes to estimate the formability of Variable cross-section Y-shaped tube hydroforming, an aggregative indicator is proposed. The effect of load path on the formability of Variable cross-section Y-shaped tube is discussed by FEM simulation, and validity of the evaluation index and simulations are proved by experiment. Results show that with the broken line load path of 0-30-30-40, the value of aggregative indicator is the greatest and the formability is the best. The optional parameters are testified by experiment and the results are in agreement with the FEM simulation results.
The Physical Model of Combustion Flame of a New Welding Material
Authors: Chang Wen Ping , Du Shi Guo , Xu Lu Tie , Zhang Li
Published: August 2013

The physical model of the flame of gunpowder composite welding rod (GCWR) is built based on the flame topography and the combustion mechanism of thermite. The chemical reactions in different flame regions are fixed with the physical model, combustion characteristics of thermite and gunpowder combustion theory.
Topology Optimization of Viscoelastic Materials Distribution of Damped Sandwich Plate Composite
Authors: Liu Zhan Xin , Guan Hong , Zhen Wei Guang
Published: August 2013

Optimum distribution of viscoelastic materials of damped sandwich plate composite for suppressing plate vibration is investigated. A solid isotropic material with penalization model is described based on the proposed interface finite element of viscoelastic layer. The objective function is chosen as maximization of the modal loss factor. Numerical results show that the optimum distributions of viscoelastic materials are mainly at the place where large shear displacements would be happened.
Preparation and Characterization of CuCl Nanorods Using CuO as the Precursor
Authors: Yang Ming , Xia Juan Juan
Published: August 2013

Nanorods of CuCl with an average length of 100-200 nm have been prepared by a simple reaction between CuO suspension and NH2OH·HCl in the presence of deionized gelatin at room temperature. Gelatin played a decisive role as an inhibitor of the direct attack of NH2OH·HCl to CuO surfaces and coagulation of the growing CuCl in producing the nanorods. The products were characterized by X-ray powder diffraction and transmission electron microscopy.
Bearing Capacity Characteristics of Lacustrine Soft Clay Hard Shell Layer Foundation
Authors: Zheng Jia Jia , Wu Li Jian , Guo Run Hua
Published: August 2013

In order to provide a theoretical basis for the use of lacustrine soft clay hard shell layer, the first thing to do is understanding its bearing capacity characteristics. Based on the project of Nan-Mao section in Hunan provincial highway S204, combining with bearing capacity test, the bearing capacity characteristics and failure mode of hard shell foundation was comprehensively analyzed. From the field bearing capacity test, it is found that the PS curve of hard shell layer has obvious changes from elastic to plastic, while the PS curve of soft soil layer under hard shell layer just has elastoplastic stage from the beginning, and the failure mode of foundation mainly are punching failure and general shear failure. So for the quality control of lacustrine hard shell soft foundation mainly includes two aspects: the deformation and overall stability.
Feasibility Experiment Investigation on Cell Microcapsule with Digital Micro-Fluidics Technology
Authors: Huang Chuan Bo
Published: August 2013

We segmented the solution of sodium alginate into droplets and prepared alginate microcapsule with digital micro-fluidics technique. The Result microcapsule size , compared with the production obtained from pressure extrusion technology, is very uniformity and is distributed in a smaller range. The sample relative standard deviation is only 3.66.The size of alginate microcapsule can easily be controlled by changing the diameter of the nozzle. Furthermore, we can control the size of the alginate microcapsule simply by changing the drive voltage. The results show that this technique is more suitable for cell encapsulation in tissue engineering, cell therapy and biopharmaceutical applications, and provides a solution to the problem of controlling of uniformity, size and membrane thickness.
The Design of Demountable Modular Milling Attachment Based on Engine Lathes
Authors: Peng Chong , Wang Lun , Meng Yu Jie , Lan Li Yun
Published: August 2013

This paper analyzes the limitation of engine lathes during manufacturing process because of its structural constraints, and designs the demountable modular attachment based on engine lathes. According to the analysis of the cutting process, an appropriate cutter drive servo motor is selected. Combined with the transmission range of tool rotational speed, transmission program is made and its parameters are determined. According to the transmission program, the actual tool change request and mounting dimensions of engine lathes, this paper designs and optimizes the structure of the power transmission device and the tool change device. Eventually the milling attachment is mounted to the engine lathe by the connecting device, reaching the demand of optimizing the working range of the engine lathe, realizing the turn-milling machining and raising fabrication efficiency and accuracy.
Design of IPC and System Calls for Multi-Process Micro-Kernel Embedded OS on ARM
Authors: Qu Bo
Published: August 2013

This paper describes the design and implementation of IPC (Inter-Process Communication) and system calls for an embedded OS in technical details, including the overview of micro-kernel OS, mechanism of inter-process communication, and implementation of message passing as well as system calls upon it. The IPC and system calls are designed for the ARM based multi-process micro-kernel embedded operating system developed by the author of this paper on Linux platform with GNU tool chain. The design of the system call service function to create a child process identical to the parent, do_fork (), is provided as an example. Practices prove that multi-process micro-kernel mechanism is technically feasible on embedded machines.
Tracking Control of Complex Seam in Laser Welding Based on Visual Measurement
Authors: Zhen Heng Zhou
Published: August 2013

In order to realize complex seam tracking accurately in the process of laser welding, a system for measuring joint seam was constructed by means of vision sensor. The system gives the method of measuring and calculating the center line, width, and normal vector. It also gives the transformation between measurement coordinate system to the camera coordinate system and the plan of the torch path. Tracking experiment of complex seam was done and shows that this tracking control system of complex seam in laser welding based on visual measurement is able to meet the requirements about tracking control of 3-D laser welding.
Harmonic Transfer between Voltage Levels in AC Systems
Authors: Zhou Si Yu , Wen Jun , Ma Shu Qing , Xue Jun Ru , Zhang Hai Ning , Cao Wen Jia , Lv Si Zhuo , Han Min Xiao
Published: August 2013

Harmonic transfer between different levels of ac systems increases the difficulty in harmonic identification and governance. From the view of harmonic transfer coefficients, the paper firstly establishes a harmonic infiltration equivalent model of different voltage levels, and then analyzes the formula of harmonic transfer coefficients. Finally, the computational and simulation analysis are carried out in MATLAB software to study the factors that affect the harmonic transfer coefficients between different voltage levels.
Comparison of External Insulation Level between AC and DC Overhead Transmission Lines
Authors: Liu Xiao Xia , Wen Jun , Yin Wei Yang , Wen Jia Liang
Published: August 2013

It is important to choose suitable insulator strings that matching the voltage level when trying to change an AC transmission line into a DC one. Historically based, most published works discuss the way of determining the number or the length of insulators for overhead transmission lines, which mainly consider about voltage levels, pollution classes, insulator types and their pollution performances. It calls for too much work for a line restructuring project. In order to simplify the work, a comparison of the choosing of insulator strings between AC and DC overhead transmission line is made in this paper. Two main results are obtained. One is that the ratio, which defined as α, of the number of insulator on DC transmission line and that on AC transmission line ranges from 1 to 2.5 with the decreasing of voltage level under the same pollution class, the other is that the value α remains substantially constant under the same voltage level, and it will decrease slightly as the pollution class increases. The results provide theoretical basis for the choosing of insulator strings in line restructuring projects.