bluuebunny/crossref_metadata_2025 huggingface dataset:
An Agent-Based Auto-Negotiation Mechanism with Semantic Web Services
Authors: Ren Wu Ling , Luo Wei
Published: February 2012

The lack of semantic and effective negotiation mechanisms, suppliers and consumers in network manufacturing services are difficult to establish satisfactory service relationships. To solve this problem, an agent-based auto-negotiation mechanism with semantic Web Services was proposed. An agent negotiation model based on the manufacturing services ontology was established. With this model, the major procedures for agent-based auto-negotiation were described, which include how to match the services suppliers and consumers, how to process semantic similarity calculation, and how to auto-negotiation, etc.
Experimental Evaluation on the Effect of the Position of the Nozzle in End Milling under Minimum Quantity Lubrication Condition
Authors: Yuan Song Mei , Liu Si , Yan Lu Tao , Xiong Qing Chun
Published: February 2012

Stricter environmental regulations are making the use of an ample amount of conventional coolant impossible because of its negative impact on the environment. Consequently, the use of minimum quantity lubrication (MQL) has been regarded as an promising alternative to conventional fluid coolant applications. Despite several studies, there have been a few investigations about the influence of the MQL nozzle position, such as distance from tool-workpiece contact zone, elevation angles, the included angle between jet direction and feed direction. The current study presents experimental investigations on influences of the above parameters on performance in end milling. Tool wear and surface roughness are experimentally studied to compare the effects of different positions. The results show that the setting location of the nozzle is an important factor regarding the effective application of MQL oil mist.
Pattern Search for Generalized Hyperbolic Distribution and Financial Risk Measure
Authors: Chen Xiu Fang , Chen Gao Bo
Published: February 2012

A new parameter estimation--- pattern search algorithm based on maximum likelihood estimation is used to estimate the parameters of generalized hyperbolic distribution, normal inverse Gaussian distribution and hyperbolic distribution, which are used to fit the log-return of Shanghai composite index. The goodness of fit is tested based on Anderson & Darling distance and FOF distance who pay more attention to tail distances of some distribution. Monte Carlo simulation are used to determin the critical values of Anderson & Darling distance and FOF distance of different distributions.Value at risk (VaR) and conditional value at risk (CVaR) are estimated for the fitted generalized hyperbolic distribution, normal inverse Gaussian distribution and hyperbolic distributio.The results show that generalized hyperbolic distribution family is more suitable for risk measure such as VaR and CVaR than normal distribution.
Enhanced Three-Dimensional Color Conversion Based on Discrete Wavelet Transform
Authors: Yan He , Wang Xiu Feng
Published: February 2012

JPEG2000 algorithm has been developed based on the DWT techniques, which have shown how the results achieved in different areas in information technology can be applied to enhance the performance. Lossy image compression algorithms sacrifice perfect image reconstruction in favor of decreased storage requirements. Wavelets have become a popular technology for information redistribution for high-performance image compression algorithms. Lossy compression algorithms sacrifice perfect image reconstruction in favor of improved compression rates while minimizing image quality lossy.
Speed Torque Measurement System Design of Micro Harmonic Drive
Authors: Chen Shang Yue , Xin Hong Bing
Published: February 2012

This paper presents a measurement design of speed torque of micro harmonic drive. On the basis of micro harmonic drive theory and the measuring method of speed torque of traditional gear an experimental system for measuring is put forward. Experimental equipment is determined. Instruments for measuring speed torque of traditional reducer can not be applied directly due to the minimal scale of micro harmonic drive. Measurement methods of micro harmonic drive and appropriate equipment are particularly important to be researched.
Dynamic Reliability Based on Perturbation Stochastic Finite Element
Authors: Mo Wen Hui
Published: February 2012

This paper proposes a method of calculating dynamic reliability using perturbation stochastic finite element. Dynamic analysis of perturbation stochastic finite element is introduced and the mean and variance of the stress can be obtained. Samples of stress and strength are generated by computer program. The Monte Carlo simulation is proposed to compute dynamic reliability of structure. Dynamic reliability of structure is computed by the stress-strength interference model. The proposed methods are demonstrated by a numerical example of axle.
Application of the Meshless Local Petrov-Galerkin Method in the Elasto-Plastic Fracture Problem of Moderately Thick Plate
Authors: Xia Ping , Wei Ke Xiang
Published: February 2012

A meshless local Petrov-Galerkin method for the analysis of the elasto-plastic fracture problem of the moderately thick plate is presented. The discretized system equations of the moderately thick plate are obtained using a locally weighted residual method. It uses a radial basis function coupled with a polynomial basis function as a trial function, and uses the quartic spline function as a test function of the weighted residual method. An incremental Newton-Raphson iterative algorithm is employed to solve incremental nonlinear local Petrov-Galerkin equations. Numerical results show that the present method possesses not only feasibility, but also rapid convergence for the elasto-plastic fracture problem of the moderately thick plate.
Human Kinematic Characteristics during Stair Descent
Authors: Tang Gang , Yang Hong Jiang , Chang Dao Fang , Wang Dong Mei , Wei Gao Feng
Published: February 2012

To design and manufacture better artificial joints, it is necessary to obtain the motion range of lower limb statistically. General Staircase as an experimental device had been designed; motion capture system and plantar force measurement system were used to establish a systematic measurement method during stairs descent. The variation and range of hip, knee and ankle joints of 40 samples along different directions in a cycle have been calculated. During stair decent, motion range of hip, knee and ankle joints reach maximum in the sagittal plane and are larger comparing to joint motion range in walking and jogging.
The Precision Analysis on the Force of Connecting Rod in Automobile Engine Based on Unigraphics
Authors: Yang Li Juan
Published: February 2012

This paper firstly established a mathematical model, and then analyzed on the force characteristics according to the mathematical model of engine connecting rod.Then the automobile engine connecting rod was analyzed by the use of three-dimensional Unigraphics (UG )software.By comparative analysis on the data obtained from experiment and the data caculated by mathematical model ,we obtained the most precise force condition,whch finally provided theoretical basis for the research on the force of the connecting rod in an automobile engine.
Virtual Design Technology of Piston Production Line Based on Lean Production
Authors: Li Pu Hong , Zhou Jun , Deng Jian Xin
Published: February 2012

Facing fierce global competition, companies must adjust the production line according to Lean Production, especially in piston field. In order to get a p roductive and rational production line rapidly and effectively, a virtual design method with virtual manufacturing was introduced. First, the production line based on Lean Production was analyzed. Secondly, the key technologies to virtual design were described: planning the virtual production line, establishing the basic resource class library, and simulating the virtual production line. At last,a virtual piston production line is presented, built and simulated in QUEST.This method will provide an efficient tool for the layout planning and rapid reconfiguration design of piston production line, realize the Lean Production goal.
Study on Chip Morphology of Electric Hot Minipore Drilling
Authors: Xu Lan Ying , Wu Qiang , Li Yu Zhong , Qu Pei Xin
Published: February 2012

Based on the electric hot drilling and ordinary drilling to drill small hole for hard-to-cut materials stainless steel, the chip morphology and microstructure were studied, the cutting deformation coefficient of the ordinary drilling is bigger, and the chip is not easy to discharge from spiral groove, while the cutting deformation coefficient of electric hot drilling is small, the chips are discharged smoothly along the spiral groove, experimental results show that the electric heating drilling improves capacity of chip breaking, and reduces drill fracture result from the chip obstruction, so it improves the service life of the drill bit.
Cusp Catastrophe Intelligence Combinatorial Prediction of Land Subsidence
Authors: Huang Chong Hao , Lu Yu Song , Bao Guo , Lin Zhen Rong
Published: February 2012

Seeking for a scientific and reasonable predict model is the key point to ensure accurate and reliable prediction results for the land subsidence. In this paper, the research of subsidence area pointed out by picks the process of land subsidence which causes by the water reservoir that conforms to the characteristic of nonlinear dynamics, thus, a new model is established to solve the combinatorial weighted coefficients by using the predict precision, and a simple method is introduced to solve the grey model and neural network combination forecast model. Based on many examples, the new cusp catastrophe land subsidence model is proved to be very effective and much more accurate.
Flow Patterns Transition Criteria from Bubbly to Slug Flow during Flow Boiling in Confined Vertical Narrow Rectangular Channels
Authors: Chang Wei , Zhang Shu Sheng , Zhao Can , Zhang Yun Li
Published: February 2012

To investigate new features of flow patterns transition during flow boiling in confined vertical narrow rectangular channels, both experiments and theoretical analysis were carried out in the present study. When the channel size was smaller than the bubble departure diameter, a new flow pattern was observed and defined as “confined bubbly flow”. According to the relative size between bubble departure diameter and channel size, two groups of flow pattern transition criteria were developed by using modified drift flux model, with taking features of flow boiling and narrow confinement into account. Satisfactory agreement was obtained by compare model prediction with experiment results. However, further verification and modification are still needed for wider applications.
Research of Case-Based Reasoning System on the Automotive Body Panel Process
Authors: Wang Zhen
Published: February 2012

Case-based reasoning technology has got better application in some fields. This article applies case-based reasoning technology to the automotive body panel process design on the basis of the author's practical experience. It establishes cases of the automobile body panels process design by the object-oriented representation. It designs the automotive body panels case library in the form of relational database.It establishes the way of case retrieval with non-quantitative and comprehensive evaluation method and nearest-neighbor retrieval strategy.
Study on High-Frequency Quenching of Steel Tube Screw Thread Lined Glass Used for Petroleum Pipe Line
Authors: Chen Li , Liu Xi Ming
Published: February 2012

The easy-to-wear and easy-to-deform of screw threads resulting in screw thread damage often form to the steel tube lined glass used for petroleum pipe because of their low joining strength. The reason resulting above problem was found through experiments. Moreover, it was found that the high-frequency quenching and tempering heat treatment process could effectively improve strength of screw threads with optimized process parameters. The optimized parameters are output power, frequency, and thickness of steel tube wall, high degree of screw threads, induction coil current, relative speed, and medium jet pressure, respectively. The high-frequency quenching and tempering heat treatment processes are a new approach to improve the hardening of strength for the steel tube lined glass.
Divisibility Forecast of Air Cushion Vehicle’s Motion in Wave
Authors: Ji Nan
Published: February 2012

This article will use the wave making theory of uniform pressure side to calculate the amphibious air cushion wave. Moreover, the composited outside wave establishes the new wave that closer to the practical hull bottom wave. At the same time, utilize the flow continuity equation to build the air cushion system then to set up the perfect mathematical model of amphibious air cushion with six variances operation. In addition, forecast the divisibility of amphibious air cushion motion in wave. The forecast result can effectively affect the basic motion characteristic of the hovercraft. The simulation result can use for the deeper research of motor function for the hovercraft operation, the debugging and optimization of the control system.
Exploration and Discuss for Calculation of Efficiency Transmission of JG150 Type Gear Trial Set
Authors: Zhao Yue , Huang Zheng Hua
Published: February 2012

The analyses aim at JG150 type gear trial set and its load device. the analysising and demonstrating aim at the applicability of the transmission efficiency formula of gear case for a closed mechanical system in Mr. Zhu Xiaolu’s book “Trial Technique and Equipments of Gears” (2)in JG150 type gear trial set. According to the analysis and demonstrating, it gives the formula of gear transmission efficiency .
Internet-Enabled Calibration Using Virtual Instrument Instead of Traveling Standard
Authors: Wang Jing , Zhang Qi , Wu Shi Lin , Wang Zhi Hu
Published: February 2012

Internet-enabled calibration, which is rapidly developing in recent years, combines the techniques of the Internet and metrology. So far, all the approaches realized for remote calibration of electrical instruments need to transfer high-accuracy units to the calibration site. This paper proposes a system using Virtual Instrument (VI) instead of traveling standard. The accuracy of data depends on the precision of data acquisition (DAQ) system and reliability of the Internet. Two basic architectures are given and several crucial techniques are discussed.
Design and Research of Testing Soil for Forest Formulated Fertilization System
Authors: Yao Lei , Wang Ni Hong
Published: February 2012

In this paper, testing soil for forest formulated fertilization needs is analyzed, describes the system architecture and hierarchy, and designs the geospatial database. On the basis of the GIS software make thematic analysis for soil fertility, according to site nutrient effect model to make decisions of forest fertilization, build the soil testing for forest formulated fertilization systems, services the forestry sector and the foresters, provide technical support for science to achieve forest soil testing and fertilizer.
Research on 3D Parametric Modeling and Virtual Assembly of Involute Modification Spur Gear Based on Solidworks
Authors: Li Zhi Gang
Published: February 2012

Based on SolidWorks, this paper researched the current methods on 3D parametric accurate modeling of involute modification spur gear, where as long as the related parameters are inputted the accurate 3D model would be attained automatically. The principle of virtual assembly with meshing backlash was introduced, and three methods were set out. It is significant to improve the accuracy of design, assembly and manufacturing of the involute spur gear.
Research on Nondestructive Image Compression Technology Based on Genetic Algorithm
Authors: He Jie , Guo Hui
Published: February 2012

Based on nondestructive and block iteration function the characteristics of the system, and put forward a kind of improved the global optimal solution from similar partition adaptive genetic algorithm is proposed. In the algorithm for the father the searching space of the individual pieces by gray coding method; Definition of father and son of minimum error for the match fitness function; Genetic algorithm is put forward the improvement of the linear adaptive crossover and mutation probability; Take excellent protection strategy choice. The experimental results show that this method in the similar image guarantee the quality and the compression ratio decompression also can obviously reduce compressed time, effectively improve the searching efficiency.
The Application of Heuristic Method in Images Pseudo Coloring
Authors: Liu Wei Dong , Zhao Xi Qing , Zheng Wei
Published: February 2012

In this paper, we use the surface of the analytical sample image recognition color histogram and adaptive modeling, black and white image are doing pseudo shading. Choose a different value in the layer R, G, and B is the most important achievement, of the technology in this method based on the analysis of the image histogram in characteristic value of different colors in the designated, different levels of image, we take action. The implementation results concept for this article to improve compared with other similar methods.
Graphene Oxide Modified DNA Electrochemical Biosensors
Authors: Ma Mei , Fan Xiao Ping , Dai Zhao , Liu Xin , Xu Shi Chao , Wei Jun , Shi Se , Chen Guang Ping
Published: February 2012

One approach had been developed for the covalent modification of graphene sheets: amidation and esterification of graphene oxide (GO). Graphene oxide was synthesized by oxidizing graphite in strong acid and lots of oxygen-containing groups, such as hydroxyl and carboxyl processed in the carbon layers, made GO strongly hydrophilic activity as well as certain of chemical activity. This work researched a novel DNA biosensor which fabricated by immobilizing GO on Au electrode modified with mercaptoethylamine(MEA), was investigated by cyclic voltammetry. The results showed that graphite oxide was an excellent material and had a promising prospect in biosensor construction.
Case Study of Optimal Material Suppliers Selection by the Value Engineering Theory
Authors: Liu Yong , Wei Qi
Published: February 2012

Engineering materials suppliers' selections directly affect the quality of the construction and economic benefits. Based on the basic principles and methods of the value engineering theory, this paper discussed the application method and basic steps of the value engineering in engineering material supplier optimization program. Combined with practical engineering, the optimal scheme of concrete material supplier is an example. The results showed that, using the basic method of the value engineering theory, through the function evaluation, cost evaluation and value evaluation coefficient calculation, can determine the optiaml material supplier and provide scientific and reasonable basis.
The Exploration on Strategy and Practice of Developing Low-Carbon Tourism
Authors: Hu Ai Juan
Published: February 2012

The state council about speeding up the development of tourism opinion clearly put to greatly promote the tourism industry of energy saving and emission reduction, five years to star hotel, A level scenic area water electricity consumption by 20%. This has long been called is low carbon industry for tourism, facing a great challenge. This paper by analyzing think though tourism is low carbon industry, still has certain reduction space, can from the government and industry management department, tourism management department, tourists in such aspects as take effective measures to achieve a low carbon tourism, promote energy conservation and environmental protection.
The Effect of Roxarsone on Soil Enzyme Activities
Authors: Sun J.X. , Guan L.Z. , Zhang Y. , Zhang Guang Cai
Published: February 2012

An indoor simulation experiment has been carried out to study the effects of Roxarsone on the soil neutral phosphatase, catalase and urease activity. The result showed that the enzyme activities were reduced by the Roxarsone, and the effect degree was aggravated with the increasing consistency. It also showed that inhibition of various enzymes on the rise - decrease trend during the whole incubation period reached its peak on the tenth day as 54.71%,33.92% and 13.81% sorting the phosphatase, the catalase and the urease in a descending order consulting the enzyme sensitivity to Roxarsone. Taking the ED10 as an example, which is 18.83, 48.31 and 185.2 mg.kg-1 on the tenth day: Negative exponential growth model were used to fit the regression rate of enzyme activities with time indicating that the time of Roxarsone toxic effects on soil enzyme extended with the consistency being increased.
Research on the White Noise Suppression by Adaptive Filtering of Genetic Algorithm
Authors: Tong Xiao Rong
Published: February 2012

Signal transmission is often subject to the disturbance of white noise. Owing to the spectrum of white noise can be found in the real number field, it is often difficult to filter out with the traditional filter. This article describes the methods of white noise suppression using adaptive filter and mean filter. First, using the genetic algorithm to optimize the weight vector of the adaptive filter, and then using the method of the mean filter to further filter, Simulation results show that the filter can effectively suppress white noise.
Level Set Segmentation Method in Medical Image Segmentation Research and Application
Authors: Miao Yu , Shi Wei Li
Published: February 2012

Medical image segmentation can be divided into two categories: one is the region of interest (ROI) identification; the other is the description of the integrity and the extraction of interest region. The emergence of the level set method greatly promoted the development of medical image segmentation. This paper studies three different level set segmentation algorithm to achieve the effective segmentation for brain gray matter and white matter of MRI image.
A Spectrum Allocation Algorithm Based on Graph Theory
Authors: Xie Yu Peng , Tan Xue Zhi , Liu Yu Tao , Ma Lin , Wu Hai Yan
Published: February 2012

In the cognitive radio system allocation algorithm based on graph theory is always research focus at home and abroad. Cognitive radio users choose main users’ spectrum which don’t use spectrum, but the available spectrum is affected on main users’ work state, location, and coverage, with the changing nature of space and time. Therefore, graph theory model analyzes spectrum allocation in the cognitive radio system, which revises constraint conditions and distribution targets of spectrum allocation. This paper summarizes the principle of existing allocation algorithm on graph theory model on cognitive radio system and analyzes some deficiencies and lays a foundation for learning theories in future.
A Determination Method of Storage Performance Attribute Parameter
Authors: Zhao Guang Yan , Sun Yu Feng , Zhao Gang
Published: February 2012

Storage performance attribute parameter is a direct reflection of performance deterioration during storage process of missile-borne product, and is a key index for determination of missile storage period and storage reliability. Under the circumstance that it is difficult to deduce performance parameter directly from storage failure mechanism at present, starting with product function signal, this article combines fault mode mechanism effect analysis and function signal relevancy modeling analysis by using expert experience, so as to determine storage performance attribute parameter of product. Finally, a typical amplification circuit is used for application verification of above mentioned methods.
Study on the Friction Properties of Surface Iodide Modified Nitrile Rubber
Authors: Han Heng , Wang Shi Jie , Lv Xiao Ren
Published: February 2012

After Iodide modification using KI solution on the surface of nitrile rubber, the treatment effect on the friction properties of nitrile rubber are explored. Experiments using different concentrations KI solution, soaking the samples for different time, the friction properties of the samples are tested under different load and lubrication. The results showed that, under different conditions, the surface of iodide modified nitrile rubber is dense and smooth, with the increase of KI concentration and soaking time, the degree of iodide modification is deeper, and the friction properties of NBR is also significantly improved.
Study of the Cellular Composite Beam’s Behavior under HVAC Ducts’ Weight while Exposed to High Temperature
Authors: Fang Li Xin , Yang Ming
Published: February 2012

A composite cellular beam may offer much advantage by using its web openings, but it could lose some fire resistance capacity. The paper studies the influence of HVAC ducts to composite cellular beam while the ducts’ weight is supported by the web holes.
Development of 3D Elastic Deformable Object Model for Robot Manipulation Purposes
Authors: Yew Cheong Hou , Mohamed Sahari Khairul Salleh , Gan Cai Yin
Published: February 2012

This paper presents a mass-spring model applied in the manipulation of elastic deformable object for home service robot application. In this paper, we present a system used to fold a piece of rectangular cloth from a specific initial condition using robot. The cloth is modeled as a 3D object in a 2D quadrangular mesh based on a mass-spring system and its state is estimated using an explicit integration scheme that computes the particle position as a function of internal and external forces acting on the elastic deformable object. The state of the elastic deformable object under robot manipulation is currently tracked from the trajectory of the mass points in the mass-spring system model in a self developed simulator, which integrates a mass-spring model and a 5 DOF articulated robotic arm. To test the reliability of the model, the simulator is used to predict the best possible paths for the robotic arm to fold a rectangular cloth in two. In the test, the state of the object is derived from the model and then compared with practical experiment. Based on the test, the error is generally acceptable. Thus, this model can be used as an estimator for vision-based tracking on the state of an elastic deformable object for manipulation by home service robots.
Nonlinear Response and Fatigue Life Prediction of Thin-Walled Structures under Thermo-Acoustic Loadings
Authors: Sha Yun Dong , Wei Jing , Gao Zhi Jun
Published: February 2012

Thin-walled structures exhibit complex nonlinear response under thermo-acoustic loadings. Complex stress-strain states decrease the fatigue life of structures seriously. Based on the thermo-acoustic response obtained, the rain flow cycle counting scheme is used to calculate the number of fatigue cycles. Then the Miner accumulative damage model is employed to predict high cycle fatigue life, combined with various nonzero mean stress models, including Morrow TFS, SWT. The nonlinear response and fatigue life of 2024-T3 aluminum plate are obtained under different combinations of thermo-acoustic loadings. Results show that the fatigue life of pre-buckled plate decreases with the increase of temperature. For post-buckled plate, as the temperature increases, the fatigue life of plate undergoing persistent snap-through keeps going down till the lowest, and then increases after entering intermittent snap-through regime. At high temperatures, the influence of high temperature on the S-N curve must be considered, the results may be erroneous otherwise.
Dynamics Analysis of an SEIQS Model with a Nonlinear Incidence Rate
Authors: Cui Ning , Li Jun Hong , Qu Jiao , Xue Hong Dan
Published: February 2012

This paper considers an SEIQS model with nonlinear incidence rate. By means of Lyapunov function and LaSalle’s invariant set theorem, we proved the global asymptotical stable results of the disease-free equilibrium. It is then obtained the sufficent conditions for the global stability of the endemic equilibrium by the compound matrix theory. In addition, we also study the phenomena of limit cycle of the systems with the numerical simulations.
Decision-Making Model on Real Estate Investment
Authors: Wo Ya Sheng
Published: February 2012

In order to make the decision-making of real estate more effectively, a model based on Projection Pursuit (PP) model was proposed. The PP model was employed to assessment the investment. And the model was used to the application of the decision-making of a real estate investment. The results are reasonable and verified with an example. This study provides a new method for the real estate investment.
Influence of the Tabor Parameter on the Roughness-Induced Adhesion Hysteresis
Authors: Wang Le Feng , Rong Wei Bin , Shao Bing , Sun Li Ning
Published: February 2012

Influence of the Tabor parameter on the roughness-induced adhesion hysteresis was investigated. To achieve this, the adhesive contact model of single asperities was considered by incorporating the Maugis-dugdale model and its corresponding extension firstly. Further more, the load-approach relationship of adhesive contact between a rough surface and a flat was analyzed. The dissipation energy during a load and unload cycle is derived for general values of the Tabor parameter. It was found that the adhesion hysteresis becomes weaker gradually with the increase of the adhesion parameter, and it becomes stronger with the decrease of the Tabor parameter at the same adhesion parameter. The adhesion hysteresis for a special case that rough surfaces with DMT(Deryagin-Muller-Toporov)-type asperities is also discussed.
Scheme for Shortcut Double Keys of Working Mode Selection in PLC-Based Numerical Control Machine
Authors: Han Jia Hao , Chen Ying , Jiang Fei Zhou
Published: February 2012

This paper is to simplify the keys on the control panel of the numerical control machine and use two keys to replace the traditional multi keys for cyclical selection of the working mode of the numerical control machine. The key signals are linked into the PLC by several signal wires on the control panel for the selection of the working mode, making the design of the panel structure and the signal circuit extremely complicated. This paper proposes the scheme in which there are only two keys “Working Mode +” and “Working Mode –” on the control panel, and works out a corresponding PLC program based on the FANUC system. The program deals with the cyclical selections of all the working modes and a quick entrance to the commonly used mode. The “Double Keys Scheme” reduces the number of keys on the panel, simplifies the control circuit, lowers the manufacturing cost, improves the stability and realizes the shortcut selection of the modes.
Design of Temperature Testing System in Multi-Parameter Combined Environmental Test
Authors: Xu Guan Hua , He Wen , Shen Run Jie
Published: February 2012

A novel design of a temperature test chamber in multi-parameter combined environmental test was introduced, in which thermoelectric coolers were adopted to achieve both high and low temperature. Multiple distributed actuators and temperature sensors were used for improving the evenness of the temperature field. A well performed cooling system for waste heat dissipating was designed based on air-cooled radiator and circulating water flow. A temperature control system based on PC and MCU with wireless communication modules was designed. The thermoelectric cooler was driving by H-bridge circuit, whose power was controlled by PWM signal. PID algorithm was applied and average temperature was adopted to be the controlled variable. Measurement and control software on the PC and MCU was analyzed and its flow diagram was given. Influenced by centrifugal acceleration, unevenness of the temperature field would increase. A fan was mounted at the bottom of the chamber to improve the evenness of the temperature field. The experiment results show that the temperature environment with other combined environment is realized in the test chamber based on the above technology.
Research on Stress Corrosion Behavior of In-Service Pipeline in H2S Environment
Authors: Li Yan , Zhang Yi Liang , Jia Guo Dong
Published: February 2012

Stress corrosion test of pressure vessels and piping in H2S environment has been explored extensively, but experimental research closed to the actual stress state of pipelines and the actual operating conditions, especially considered the combined effect of various factors is not common. Stress corrosion test simulated the actual operating conditions is taken in this paper. Four in-service pipes are researched as specimens and complex stress field is built by a specially designed loading device. Specimens are immersed in three different H2S concentration environments. The appearance and expansion of crack is observed regularly and the sensitivity of pipeline on stress corrosion is evaluated by metallographic examination. The result shows that: Intergranular corrosion, transgranular corrosion or micro-crack is not found in H2S corrosive solution (500×10-6, 800×10-6mg/L) after 2160 hours or in saturated H2S corrosive solution (greater than 2000×10-6mg/L) after 360 hours. A surface crack is found in H2S corrosive solution (500×10-6mg/L) after 720 hours and the expression for expansion rate of the crack during 2160 hours is a=16.835e0.0002h.
A Novel Registration Approach for Mammograms Based on SIFT and Graph Transformation
Authors: Zhong Yang Jun , Cai Qian
Published: February 2012

Mammogram registration is an important step in the processing of automatic detection of breast cancer. It provides aid to better visualization correspondence on temporal pairs of mammograms. This paper presents a novel algorithm based on SIFT feature and Graph Transformation methods for mammogram registration. First, features are extracted from the mammogram images by scale invariant feature transform (SIFT) method. Second, we use graph transformation matching (GTM) approach to obtain more accurate image information. At last, we registered a pair of mammograms using Thin-Plate spline (TPS) interpolation based on corresponding points on the two breasts, and acquire the mammogram registration image. Performance of the proposed algorithm is evaluated by three criterions. The experimental results show that our method is accurate and closely to the source images.
Research on Mechanical Property of Top Drive Casing Running Tool’s Slips
Authors: Jiang Fa Guang , Liang Zheng , Zhao Guang Hui , Yan Yong Hong , Wang Pan
Published: February 2012

Top drive casing running tool, because of its convenience, speed and safety, has been widely received by the research enterprises of petroleum mechanism and instrument. Now, there have been developed several kinds of casing running tools which have gradually been used by the drilling corporation at home and abroad. The slips system’s parameters, such as the axial thrust, slips length, teeth form, teeth interval, etc., directly affect the performance and safety of casing running tools. Those have no reports about correlative theoretical investigation results. Here, we found the mechanical analysis model between slip and casing and gain the minimum primitive axis thrust of slips. Then the minimum teeth interval of the slips is deduced by contact mechanics. And then the slips available working length is worked out through the shell theory and empirical formulas. Finally, based on finite element method, we obtain tooth form angles’ recommendable range by studying the tooth form. This study supplies theoretical basis to structural design of slips system of the top drive casing running tool.
Design and Implementation of Remote Disaster Backup Solution to Oracle Lob
Authors: Wu Qiong , Mao Ying
Published: February 2012

The disaster backup of oracle database has been a hot issue for a long time. However, mature solutions to disaster backup of oracle lob are limited, meanwhile, text and multimedia messages are stored as lob type in oracle database. This paper proposes a possible way to quickly capture, transfer and backup the changed data of oracle lob.
Research on the Application of Wireless Communicating Technology in the Rescue of Earthquake
Authors: Li Hua Min
Published: February 2012

People recognized the importance of communication from Wenchuan earthquake in 2008, which could help rescue team to protect the life and property of the people without delay, at the same time reduce the loss caused by earthquake. According to the feature of emergence rescue in earthquake and requirement on communication of fire army, this paper set forth the application standards and modes of wireless communicating technology in the scene of earthquake rescue, which included wireless short-wave and satellite communication.
A Study of Virtual Remote Laboratory and its Subsystem by Using Modelica
Authors: Ge Jia Huan , Zhu Shan'an
Published: February 2012

iEELab((Internet-based Electrical Engineering Lab) at Zhejiang University is an integrated laboratory including physical and virtual remote experiments. This paper first makes a brief introduction to the overall architecture of iEELab. Then, focusing on the virtual remote laboratory which uses a unified object-oriented language Modelica for modeling and simulation, we elaborate its architecture and the internal mechanism of virtual remote lab operation. Finally, taking a subsystem of iEELab-the plate angle control experiment system as an instance of the virtual remote lab, we display the process of modeling and simulation of virtual experiments using modelica.
Model and Simulation on Flow and Pressure Characteristics of Axial Piston Pump for Seawater Desalination
Authors: Zhai Jiang , Zhou Hua
Published: February 2012

With cavitation model being considered, a LP (Lumped Parameter) model and a CFD (Computational Fluid Dynamics) model on the flow and pressure characteristics of the axial piston pump for seawater desalination were created. Based on the geometry structure and operating condition of the pump, these two models were numerically calculated and corresponding results were compared and discussed. Both the two models can describe the dynamic flow and pressure characteristics of the pump. The CFD model is accurate and many details such as cavitation position can be predicted. LP model is a simplified model compared with CFD model. Because the damping effect of the inlet of the pump is neglected, this model is only suitable for rough calculation in engineering.
Using SVM to Predict Stock Price Changes from Online Financial News
Authors: Dai Shu Yan , Li Ning
Published: February 2012

Many technical analysis use financial indices to predict stock price changes. In this paper, we present a different approach for prediction stock price fluctuations using financial news. Our method approaches the stock price prediction problem from an information retrieval perspective. We apply both text analysis and pattern classification techniques to search for important online news that are relevant for stock price changes. First, the online financial news and the corresponding stocks are extracted. Then we apply Support Vector Machine (SVM) to construct a model that predicts the price changes for the stocks. Finally, the stock changes prediction model is used to classify and extract upcoming important financial news. The experimental results demonstrate our method is effective for seeking the important financial news for stock price changes.
Research on Earthquake Load Analysis of Large Structures in Non-Slide Construction
Authors: Yang Gong Sheng
Published: February 2012

Ocean large steel structures are usually constructed on the slide site, being prone to forming large deformation because of its features such as heavy weight, large bulk and great span. However, the 18 large-scale steel structures of a nickel ore project are need to building on the non-slide foundation, resulting in different settlements of foundation. Moreover, the earthquake load is one of main load of the high-level structure. And the earthquake often happens suddenly and is out of control, with devastating destructive power. To ensure the safety of construction, it’s necessary to analyze the influence of large steel structure responding to the seismic load. This paper expounds the analyzing method on the response of the large steel structure based on non-slide site to the earthquake load. This article has analyzed responses of three-dimensional finite element model to the earthquake load with ANSYS analysis of finite element, such as the stress, deformation analysis, modal analysis and transient dynamic analysis, and assessed the risk of earthquake. This paper provides a feasible and effective analyzed method for researching the response of structure built on non-slide site to the earthquake load, which has important significance for the seismic design of the structure.
Key Technologies of Digital Pre-Assembly in Networked Collaborative Design and Manufacturing
Authors: Wang Hui Fen , Nan Feng Qiang , Liu Ting Ting
Published: February 2012

According to the requirement of collaborative product development, a networked collaborative design and manufacturing system is put forward. A neuter digital assembly model which is independent from all kinds of the commercial CAD software is set up. The quick planning of the assembly sequences and the automatic search of the assembly dimension chain can be realized by the simulation.
Data Transmission Mode of a Small-Scale, Real-Time Industry Control Network
Authors: Jie Xin Chun , Li Wen Tao
Published: February 2012

MAC protocol of bus control network has important influence on its real-time feature. Combining Profibus-DP protocol and Token Bus protocol, a new bus model suitable for small-scaled control system is put forward. Under the principle that follows a control network whole balance, the LAS and GAPL maintenance process in token passing mode and master-slave polling process in data exchange mode of Profibus-DP are discarded. The basic cutting thought of this bus model is summarized; its concrete realization is illustrated in detail, theoretical maximal value of message transmission time and actual test result are presented. The experiment result shows the system’s real-time characteristic is improved, and come to the expectant result.
The Spindle Static Characteristic Analysis of HTC3250µn NC Machine Tool
Authors: Xie Hua Long , Zhang Wen Ke , Guo Hui Min , Liu Yong Xian
Published: February 2012

The analysis of spindle static stiffness is particularly important. The concept of spindle stiffness is introduced. Based on software ANSYS, the finite element analysis model of simplified spindle is established. Two equivalent forms of bearings are discussed and the analysis results are compared. The stress distribution nephogram of spindle is given. The research indicates that using spring-damper element instead of bearings is more suitable and the machining accuracy mainly depends on the stiffness rather than strength.
Design of a Pile Press Machine for Automobile Gearbox Tapered Roller Bearing
Authors: Zhang Guang Guo , Zhang Lei , Chang Zhi Bin
Published: February 2012

There are many problems in the off-line manual press mounting of tapered roller bearing outer ring of some automobile gearbox shell, which are unstable quality, poor precision, the low efficiency and high labor intensity. In order to solve these problems, we designed a vertical pile press machine. PLC is used to achieve automatic control production, and the stable mounting force provided by air pressure system can adapt to the press mounting requirements of the bearings of eight and nine shift gearbox shell. On being applied to the automatic production line, it can press-mount simultaneously the outer ring of intermediate shaft bearing and the second shaft bearing, and switch rapidly between the eight shift gearbox and the nine shift gearbox. Therefore the automatic production is achieved , which improvs the production efficiency , ensures the assembly quality, and brings higher profit to the enterprise.
Magnetorheological Materials Theory United in Energy
Authors: Sun Hu , Peng Xiang He
Published: February 2012

Magnetorheological materials belong to a kind of new intelligent materials and their application prospect is very optimistic, however electromagnetic relations are very complex, and with the outside world and boundary conditions have close relations, so each model and theory has its pertinence and limitations, hard to get the universal unified the constitutive relations, so this paper based on energy, gets a set of magnetorheological materials about the theory.
Instrument Management System for Equipment Remote Control via RFID
Authors: Sung Wen Tsai , Chen Jui Ho , Chiang Yen Chun
Published: February 2012

This paper mainly in combination with RFID to construct a set of power system equipment remote control, first on the tags reader received after the use of Visual Basic to determine the signal and transmits the signal via the RS232 cable to the control circuit 8051 to control the instrument power switch. The topic written in Visual Basic RFID, using features such as: personnel control systems, access control systems are derived from the time of access control systems, many instrument control systems, and use the records stored in the form of the function, the other circuit is transmit signals to Visual Basic 8051, then by 8051 to control the instrument power switch.
The Improvement of Maximum Power Point Tracker Algorithm in Photovoltaic Power System
Authors: Chai Yu , Shang Dong Mei
Published: February 2012

Maximum power tracking is one of most important methods to improve efficiency of Photovoltaic power system. By simulating and analyzing the photovoltaic cell model，using Boost circuit to achieve maximum power tracking. Based on the analysis of the constant-voltage method, perturbation and observation method, then combining these two methods，I Put forward the constant-voltage method combined with perturbation and observation method, and has carried on the simulation.
Key Factors Affecting the Amplitude of a Composite Ultrasonic Wiredrawing Vibration System
Authors: Shan Xiao Biao , Qi Nai Ming , Wang Li Li , Xie Tao
Published: February 2012

This paper studied the key factors affecting the amplitude of a composite ultrasonic wiredrawing vibration system, for designing a powerful ultrasonic vibration system. The finite element analysis (FEA) was performed. The results showed that the variable cross-section shapes of horns and the angles between the connection of both ends of the cross-section and the center line had great effects on the amplitude of an ultrasonic vibration system. In order to valid the theoretical result, the experiments were carried out on a composite ultrasonic vibration system. The experimental result demonstrated that the conical variable cross-section rods used in an ultrasonic vibration system produced large amplitude.
Analytical Solution of 1-D Viscoelastic Consolidation of Soft Soils with Fractional Maxwell Model
Authors: Zhang Ya Peng , Gao Feng
Published: February 2012

Considering the rheological characteristics of soil, think the fractional maxwell with viscoelastic model can be described, the fractional maxwell model into integral form of saturated soft soil layer, the one dimensional compression, through the Laplace transform problems get instantaneous loading and single stage, the analytical solution of the loading conditions.
Fuzzy PI Control Strategy of the Air Bleeder Valve on SIMULINK
Authors: Wang Yang , Wang Yin Yan , Du Jian Wei , Wang Gui Xin
Published: February 2012

In order to solve cylinder outbreak problem of high pressure, the blowoff system has been added at transformation process from conventional turbo diesel engine to sequential turbocharing diesel engine. Set up air bleeder valve model of diesel engine sequential turbocharing high condition based on SIMULINK software platform and the air bleeder valve regulated by fuzzy PI control strategies, when the stable operation and in low load conditions of diesel engine, analyses the burst control effect as increase the amount of fuel delivery at different situation. The simulation results show that the model has fast response, high control accuracy and good control effect of high burst pressure, achieve control of diesel engine performance, fuel economy and reliability.