bluuebunny/crossref_metadata_2025 huggingface dataset:
Symmetrical Beauty: Pneumatic Press Based on Quadratic Orthogonal Force Amplifier Driven by Double-Face Rack-Gear Mechanism
Authors: Zhong Kang Min , Li Xin , Zhang Wen Fang
Published: February 2011

Pneumatic Presses are marked by features of high-motion speed, high productivity, energy conservation and environmental protection. The drawback is its low air system pressure, generally only 0.4-0.7 MPa, which unsuited to occasion require large output force. A new pneumatic press, based on quadratic orthogonal toggle force amplifier, is introduced in this paper. The output force of pneumatic piston is amplified for two times and force amplifying ratio can up to 20, thus to increase the output force substantially, although with constant piston diameter and system pressure. Moreover, with the application of symmetrical double-face rack-gear mechanism, radial force on piston rod and lateral force on pressure head are perfectly balanced. The entire mechanical system boasts features of low friction loss, low vibration and noise and high transmission efficiency.
Numerical DPM Model for Two-Phase Flow in Aero-Engine Bearing Chamber
Authors: Xu Rang Shu , Wang Juan Juan , Xu Wei , Liu Li Bo
Published: February 2011

The main bearing chamber is a major part of the lubrication system in aero-engine, it is important to know the influence of operation parameters on air/oil two-phase flow, so as to optimize the design of aero-engine lubrication system. The air/oil two-phase flow in a simplified bearing chamber model in an aero-engine is simulated by means of discrete phase model (DPM) and wall-film model with CFD approach. The simulation results coincide with the existing experimental data. The oil film thickness and concentration of droplets in bearing chamber are presented at different rotational speeds and different lubricating oil flow rates.
Computer Simulation of Uniform Corrosion Process for Carbon Steel
Authors: Wu An Qi , Yu Hong Ying , Sun Dong Bai
Published: February 2011

Computer simulation is a new research approach for corrosion science. A simple model is proposed to describe uniform corrosion process which is a common corrosion failure type for carbon steel. As a lot of chemical and physical processes take place during corrosion reaction with complexity and random, we have to simplify the complex process to establish a math model which is suitable for a simulation calculation. The computational model based on cellular automata (CA) approach uses local rules to govern the electrochemical reactions, and simulate the corrosion system as a discrete dynamical system. As a result the simulation computational solution is compared with experimental data in this work, both of which show the same characteristics of data distribution. The results presented the feasibility of the cellular automata approach to simulate the corrosion process and to describe change of surface topography in company with the increase of corrosion quantity.
The Design of Wireless Communication System in Oil Log Spot
Authors: Dong Peng Min , Dang Xiao Li , Wang Tian Qi , Li Guan Zhu , Zhang Jian Li , Xu Dong Hong , Yao Zhi Gang
Published: February 2011

This article that based on the communication technology of 2.4G global free frequency range adopts technical route which can stabilize and reliable work in high—intensity magnetic field and other disturb spot acquisition of signal technology. The technical route is that collecting the spot signal and making the wireless communication, then restoring the signal to logging. The modern information communication in oil log will come true through this process. This technology not only overcome many malpractice which exist in the wired communication but also allow the logging cabin far from well site, which both reduce the cost of logging and improve the work efficiency
Concise Robust Control for Ship Roll Motion Using Active Fins
Authors: Guan Wei , Zhang Xian Ku
Published: February 2011

This paper details the implementation of a robust PID fin control system designed by using close-loop gain shaping algorithm (CGSA) to stabilize the roll motion of a training ship “YUKUN”. Firstly, the effect of different representation of linear and nonlinear damping and restoring moment on the roll response is investigated. The solutions of different roll response equations are solved with the fourth order Runge-Kutta method. In the following, the design process of robust PID controller using CGSA is described and the controller designed has concise structure and strong robustness. The typical cases of ship operations are worked out and a roll reduction of 80%-85% is achieved in various simulation conditions.
Embedded Control Design for Insulin Pump
Authors: Ali Wahied G. , Nagib Gihan
Published: February 2011

This paper presents the design of an embedded control system for insulin pump. The insulin pump is an integrated component in any closed loop insulin delivery system for type 1 diabetes. The pump consists of three main components: micro-needles, insulin reservoir(syringe), and piezoelectric (PZT) linear servo motor. The actuated syringe has an injection back pressure that resists the linear motion of the driving PZT motor. This back pressure acts as a disturbance and leads to in accurate position and consequently an imprecise insulin dosage. Therefore, a highly precise positioning control on the pump is required to control the insulin dosage and to maintain the blood glucose level in its safe range. The proposed controller is designed using fuzzy logic as a nonlinear controller to compensate any non-modeled nonlinear ities in the system.The embedded controller for the PZT motor can be implemented using FPGA or microcontroller chip. This controller acts as a slave and responds to its master controller which controls the complete closed loop insulin delivery system.
Fuzzy ADRC Controller Design for PMSM Speed Regulation System
Authors: Su Guang
Published: February 2011

This paper introduces a new fuzzy active disturbance rejection control (ADRC) design technique into permanent magnet synchronous motor (PMSM) speed regulation system. By using fuzzy logic control, the proportional coefficient of nonlinear state error feedback (NLSEF) is timely adjusted to obtain the suitable feedforward control variable. The uncertain term of PMSM is tracked and estimated by using the extended state observer (ESO). The control variable can be obtained through subtracting the estimator of ESO from the output of NLSEF. The simulation results show that the controller operates robustly under modeling uncertainty and external disturbance and produces better dynamic performance than the ADRC controller.
Analysis on Thermal-Mechanics Coupling of Milling Insert Based on Principle of Cellular Automation
Authors: Sun Bao Jun , Tan Guang Yu
Published: February 2011

The thermal-mechanics coupling rule and analytic method of coupling based on principle of cellular automation (CA) have been put forward for the sake of solving coupling effect problem of multi-physics field on the milling insert during milling. The evolution rule of stress function was derived on milling insert according to thermal elasticity by analysis of thermal-mechanics coupling of milling insert based on principle of CA. The temperature change function of the milling insert was deduced in the event of fixed cutting parameter based on heat transfer theory. The local rule of CA on thermal-stress of milling insert was established. The influence factor and distribution regularities of thermal stress were obtained. Compared the numerical-value result of analysis on thermal-mechanics coupling based on principle of CA with analytic result of finite element method(FEM), the effectiveness of CA method was testified. A way of analysis with flexibility was provided for coupling problem of thermal stress field and mechanical stress field for milling insert. The theory basis of research was provided for optimum structural design of indexable milling inserts.
A Nonlinear Tolerance Analysis Method Using Worst-Case and Matlab
Authors: Yu Mei Qiong , Yan Yan , Hao Jia , Wang Guo Xin
Published: February 2011

The tolerance analysis methods are usually used to test the result of product design and assembly; moreover the tolerance analysis also is a fundamental technique in precision design process. So far, there are two kinds of tolerance analysis methods: statistical tolerance analysis and worst-case analysis; they have their own characteristics and drawbacks. In this paper, it presents a nonlinear tolerance analysis method which uses Matlab tool to construct the nonlinear tolerance analysis mathematical formulation and calculate the result of nonlinear tolerance analysis based on the principle of worst-case tolerance analysis. All the processes are dealt with and tested by computer. The engineers only enter some basic parameters through the standardized interface, and then the result can be obtained without artificial intervention. In addition, the accuracy of calculation result meets the production requirement. The system of the nonlinear tolerance analysis is easier for engineers to use.
Ultrasound-Assisted Acceleration of Soybean Oil Epoxidation and the Interfacial Tension Study
Authors: Han Li Juan , Li Lin , Liu Guo Qin
Published: February 2011

This work was to reduce the epoxidation time of soybean oil with the assistance of ultrasonic irradiation and a kind of fatty acid as the catalyst in the presence of formic acid as the carrier of reactive oxygen. The operational parameters affecting the epoxy value of soybean oil, such as the amount of fatty acid and the ultrasonic frequency, ultrasonic power and reaction time were studied. And the interfacial tension of the aqueous-oil phase was decreased with the catalyst fatty acid adding or the assistance of ultrasonic irradiation, therefore the reaction rate could be accelerated. The maximum epoxy value of epoxidized soybean oil was 17.19% increased compared with the epoxy value that treated by non-ultrasound assistance in the same reaction time. Experimental results indicated that the epoxy value could be enhanced under the ultrasonic irradiation assistance, where the reaction time could be effectively reduced.
Study on Application and Issues of Bag Dedusters in Coal-Fired Power Plants
Authors: Wang He Cen , Jiang De Hou , Wang Qin
Published: February 2011

To meet the standard requirements of dust emission for boiler and ensure the safety and normal operation of desulfurization equipment, bag dust filtering technologies have been used widely to deal with flue gas. Because of design defects and different running conditions, abnormal breakage may appear in the key parts of the bags, particularly some issues such as oxidation and acidic corrosion of the bags may happen in short-term application of electrostatic-bag precipitators. This paper elaborates the status of bag filters in coal-fired power plants, discusses some issues of bag filtering technology in design, manufacture and operation, and especially analyses the special problems of composite electrostatic-bag precipitators. Solutions are presented for extending the life of filtering bags.
The Flow Field Analysis and Optimization of Diagonal Flow Fan Based on CFD
Authors: Wang Xiao Jing , Chen Rui , Zhou Yong
Published: February 2011

In this paper, the flow field of the diagonal flow fan is simulated by FLUENT. The flow field of the axial clearance, the guide vanes and the diffuser section are analyzed and evaluated thoroughly. It is confirmed that the main factors influencing the fan performance are the guide vanes, and the diffuser section. The results are useful in guiding the optimal design to improve the flow field of diagonal flow fan.
Fractal Characteristics of Soil Particle-Size Distributions under Different Landform and Land-Use Types
Authors: Song Xiao Yu , Li Huai You
Published: February 2011

It can provide theoretical guidance for the prevention of soil erosion and planting structure adjustment to study on fractal characteristics of soil particle-size distributions under different landform and land-use types. Soil particle-size distribution (PSD) is one of the most important physical attributes due to its strong influence on soil properties related to water movement, productivity and soil erosion. The fractal and multifractal measures were useful tools in identifying soil PSD with different taxonomy. Land-use type, as one of important factors to affect soil PSD was paid little attention in the previous research. In this paper, the theory of soil particle-size fractal was applied to characterize PSD in soils with the same taxonomy and different land-use types. Then the effects of land use on the fractal and multifractal parameters were analyzed. The study was conducted on the loess hilly areas of the Loess Plateau in Nanxiaohegou basin of Gansu. Soil was sampled from 18 land use types. The soil PSDs were obtained by sieving and pipette methods. The result showed that: (1) the mass fractal dimension of soil particles was significant correlated with the soil mass clay content; （2）both the soil mass clay content and the mass fractal dimension of soil particles showed the same tendency of increasing with the soil layer， and the mass fractal dimension relates to the land uses and topographic feature. Thus they could be potential parameters to reflect soil physical properties influenced by land use. More significant result is required in the future study to test the applicability of fractal parameters in characterizing land use effect on soil particle-size distributions.
Analysis of an Energy-Efficiency Supervision and Diagnostic System for Large Public Buildings in Ji Nan
Authors: Li Di , Li Zhen , Cao Yong Min
Published: February 2011

This paper demonstrates an energy-efficiency supervision and diagnostic system (ESDS) to illustrate problems that the buildings do not perform as well as anticipated during design stage. The ESDS consists of a set of sensors, data acquisition system, data analysis and diagnostic system investigated on a web-based remote access system that can be worked to identify problems in practice. The states of monitoring and diagnosing building operations including the electricity consumption、water consumption、overall evaluation of energy consumption and air condition system was analysed in detail. The results show that the energy efficiency of this large public building has great potential during the practice.
Study on Monitoring Damage about Material of Blade in Wind Turbine Based on Acoustic Emission
Authors: Zhao Xin Guang , Chen Chang Zheng , Zhou Bo , Liu Xin Hong
Published: February 2011

The monitoring about key components of large wind turbine is important, especially blade. Damages in the material of blade in large wind turbine will cause strain and thus can produce acoustic emission. And this study is presently a new research area in china. This paper refers to the preliminary exploration of common fracture characteristic. Acoustic emission can be used to identify and diagnose the damage. Analyzing the acoustic emission characteristics of the damage in the wind turbine system is emphasized by the experiment. At first, the acoustic emission signals of two different damages and vibration signal of those are compared and analyzed to demonstrate the superiority of the time domain of acoustic emission signals based method for the damage identification. Then, the wavelet is introduced and its characteristics are illustrated. Finally, the wavelet is used to analyze and discuss the time-frequency features of the damage acoustic emission. Some frequency band of wavelets is recomposed, and the results can efficiently extract the features of acoustic emission signal and identify the damage. It offers a valuable reference to monitor the damage about blade of large wind turbine.
Study on the Properties of Boron-Containing Ores/Epoxy Composites for Slow Neutron Shielding
Authors: Li Zhe Fu , Xue Xiang Xin , Jiang Tao , Yang He , Zhou Mi
Published: February 2011

Three kinds of low cost shielding materials using boron-containing ores and epoxy as starting materials were developed. The three boron-containing ores consist of natural green ore that is specific in China and the two artificial minerals that are boron-containing iron ore concentrate and boron-rich slag. They were got after natural green ore dressing and separation from blast furnace, respectively. The shielding performance of slow neutron and 60Co γ ray among the three shielding materials were compared. The results show that boron-rich slag as neutron absorber performs relative good slow neutron shielding ability, its macroscopic cross section (Σ) is 0.271cm-1 which is about 1.72 times higher than Lead-Boron Polyethylene B201 whose macroscopic cross section (Σ) is 0.158cm-1. Boron-containing iron ore concentrate/epoxy composite performs relative good 60Co γ ray shielding ability and its linear attenuation coefficient (μ) is 0.0772cm-1. The elements boron and iron that exist as compound in ore are the main reasons to affect the slow neutron shielding performance. The iron element that exists as compound in the ore has the main attribution to 60Co γ ray shielding.
Simulation of Wind Effects Embracing a Complex Shape Super High-Rise Steel TV Tower Using CFD
Authors: Tan Ya Ya , Li Chun Xiang
Published: February 2011

Full scale Ningxia super high-rise steel TV tower (NXTVT) model is established in the numerical simulation to investigate the flow field around it. And then, the UDF program of mean wind section plane, turbulence kinetic energy and turbulence dissipation rate were compiled. The flow fields under these two typical inflow conditions, 30 degree is chosen as the field measurement data. The results show that both the RNG model and the Realizable model can simulate the distribution rule and similarity. Both can give reasonable turbulence kinetic energy distribution in the region of windward sharp edge, where flow separation occurs. Subsequently, the mean pressure field with certain precision can be obtained in the highly turbulent negative pressure region.
The Influence of Oolong Tea Polyphenol and Black Tea Polyphenol on Gelatin Gels Texture
Authors: Wang An Na , Wu Li Gen , Li Xiu Ling , Sun Yu Dan , Wang Shao Wen , Jia Ai Xia , Xu Xiang Ying , Zhang Yuan Yuan , Wang Jie , Wang Chao , Fu Qin Qin
Published: February 2011

The effects of Oolong Tea Polyphenol and Black Tea Polyphenol on Gelatin Gels Texture properties were investigated in this paper. The results showed that the brittleness and hardness of gels added black tea polyphenol was higher than that of the blank sample, however, the brittleness and hardness of gels added oolong tea polyphenol was lower than that of the blank sample. The gel elasticity was maximum when adding black tea polyphenol concentration was 2.2%(w/v), and almost no-change before or after the maximum. The change of elasticity was not great with the increasing of oolong tea polyphenol concentration.
Compression Test on Cold-Formed Steel Built-Up Back-to-Back Channels Stub Columns
Authors: Ting Chui Huon Tina , Lau Hieng Ho
Published: February 2011

Built-up sections are used to resist load induced in a structure when a single section is not sufficient to carry the design load for example roof trusses. In current North American Specification, the provision has been substantially taken from research in hot-rolled built-up members connected with bolts or welds [1]. The aim of this paper is to investigate on built-up back-to-back channels stub columns experimentally and theoretically using Effective Width Method and Direct Strength Method. Compression test was performed on 5 lipped channel and 5 back-to-back channels stub columns fabricated from cold-formed steel sheets of 1.2mm thicknesses. The test results indicated that local buckling is the dominant failure modes of stub columns. Therefore, Effective Width Method predicts the capacity of stub columns compared to Direct Strength Method. When compared to the average test results, results based on EWM are 5% higher while results based on DSM are 12% higher for stub column.
A Study on Universal Design Product Development Combined with Value Engineering Approach
Authors: Park Seongjun , Park Jae Il
Published: February 2011

As the human-centered product design has been emphasized as one of differentiated marketing factors, the products developed with the factors related to human characteristics are on an upward trend. Current development for the human-centered products is based on PPP(Product Performance Program) and UD(Universal Design) cases, but the products often results in being highly expensive so that a few of customers benefit from them. To achieve less expensive UD products, the initial stage of the product development needs to include value engineering (VE) that provides analysis tools for UD functions and their costs. This study presents UD development process integrated with VE.
Hot-Stamping Process Simulation and Optimize Research for Collision Beam of Automobile Door
Authors: Wang Chao , Zhu Bin , Zhang Yi Sheng , Shi Jie , Dong Han
Published: February 2011

Hot-stamping molding for ultra-high-strength steel have some similarities with traditional cold-stamping molding in the aspects of molding process and die design. But due to the effect of temperature variation of blank, hot-stamping have some differences in ultra-high-strength products design, material selection and forming process design. Some special forming defects, such as local thinning, cracking and wrinkling, could appear in hot-stamping process due to these differences. In order to obtain uniform phase structure and get high-quality products, it is very important to be able to predict and control the blank temperature and the consistence of blank cooling rate. The thermo-mechanical characteristics of hot-stamping are studied with the material of ADVANCE1500 (22SiMnTiB). Based on the results of simulations and experiments, conclusion are drawn that the complexity of the product and the blank which contacts with die asynchronously causes the uneven distribution of the blank temperature. This is the key factor that leads to the poor mobility of the blank material and local thinning, cracking, wrinkling and other defects in forming process. Proper clearance between punch and die can reduce the probability of defects which could contribute to the improvement of hot-stamping process.
The Analysis of the Temperature Field and Deformation of Cylinder Liner Base on Finite Element Method and Experiment
Authors: Li Kun , Su Tie Xiong , Li Xiao Jie , Xing Shi Xin
Published: February 2011

The distortion of the cylinder liners of internal combustion engines has a significant affect on engine operation. It can affect the oil consumption, the blow-by, the wear behavior and, due to friction, the fuel consumption. In order to achieve future requirements regarding exhaust emissions and fuel consumption, the development of low distortion engine blocks will play a significant role. Finite element method with experimental data were used to calculate and analysis the temperature field and machine assembly of a 150 engine cylinder liner in this paper. It can provide a theoretical basis for the controlling of the cylinder liner deformation.
FEM Analysis of Plug Packer Based on the Model of Mooney-Rivlin
Authors: Zhang Ce , Zhang Shi Min , Geng Dai , Zheng Jian Ming , Fan Wen Bin
Published: February 2011

The technology of Pipeline high-pressure intelligent isolation is a new technology which has been developed by Company PSI since the 1990’s, and the core technology, packer’s sealing performance has been blocked from then on. In this paper, we study the Polyurethane columns specimen of different hardness though ANSYS, then fit with the curve from the experiments, in order to get the Polyurethane columns’ Mechanical constants of Model Mooney-Rivlin. Calculate the deformation between two statuses, then according to isolation pressure and anti-convexity of packer we choose the packer of appropriate hardness. Finally, analysis the packer under different pressure, get the working curve of isolation ability, and the outlet can be used in the design of packer.
Manufacture of Custom Contoured Seat Cushions Using Computer-Aided Design Computer-Aided Manufacturing (CAD/CAM) Technique
Authors: Sekou Singare
Published: February 2011

In the rehabilitation engineering area, the pressure ulcer prevention is an important and healthy problem, especially for people with the spinal cord injured (SCI). This paper aim to develop a computer aided design and computer aided manufacture (CAD/CAM) method to manufacture custom cushions to prevent pressure ulcer. A patient’s buttock was digitized using 3D laser scanner, and the captured buttock data was processed in reverse engineering environment to generate the 3D surface model of the buttock. The 3D surface model of the buttock is imported into Unigraphics software to create the solid model; then, a flat rectangle that represents the cushion was generated under the buttock to create the buttock-cushion system. Based on the load-deformation relation of cushion materials acquired by the test, the depth of cut of the cushion was established and a CAD model of cushion shape was created through a Boolean subtraction. The CAD model of the contour is post-processed into code that the numerically controlled milling machine (CNC milling) can use to machine the cushion.
The Optimum Solution to Diameter of the Down Wind Turbine
Authors: Zhang Li
Published: February 2011

In view of the deficiency in calculation precision of turbine diameter at present, the mathematics model of energy distribution on swept area of the down wind turbine was proposed, and the energy expression that taked into account wind shear and tower shade effect was also accurately deduced.Combining with the concrete case, three different calculation methods about turbine dimeter were respectively solved.The calculation results show that the influence of wind shear is really little in turbine diameter calculation.The influentce of tower shade effect is obvious,while the influence of tower height is maximal. There is approximately a linear relationship between the turbine diameter and the tower diameter. The tower height has the maximum. There is a optimum match relationship that satisfies the demand of energy output in the down wind turbine.
Design of the Speed Regulating PIG with Butterfly Bypass-Valve
Authors: Tan Gui Bin , Zhang Shi Min , Zhu Xiao Xiao
Published: February 2011

Foreign development regarding devices for speed regulating of in-pipe robot inspection has been commercially applied in gas pipeline this decade, however, the results of theoretical and structural research on bypass device were scaled in and abroad after the research of literature. First, this paper deals with the new structure of a butterfly bypass-valve, the basic parts and working principle on this speed regulating unit. The using of a butterfly disc in bypass-hole of PIG (pipeline inspection gauge) can achieve a speed regulating purpose in bypass-PIG. Next, the theoretical model of pressure loss and regulating feasibility or ability of PIG are introduced by the similar mathematical model with a throttle valve. Finally, give the conclusion.
The Principle and Calculation of Hydraulic Driven Downhole Twin-Screw Pump
Authors: Zhao Zhong Hao , Li Zeng Liang , Lu Sheng Nan
Published: February 2011

Structure composition and working principle of hydraulic driven downhole twin-screw pump are firstly introduced, and the calculation method of work and structure parameters when downhole twin-screw pump and turbine motor operate is given, and dynamic measuring process when ground power pump, turbine motor and downhole twin-screw pump coordinate is also given. The given calculation process which is derived after sufficiently considering working principle and structure features of the pump, is instructive to the design of this kind of downhole twin-screw pump, and also provides technical support for series design of hydraulic driven downhole twin-screw pump in the future.
The Study of the Heat Device in Wind-Magnetic Water Heater
Authors: Liu Xiao Hong , Chen Chui Can , Yu Hong Dong , Wei Gui Dan , Tian Zhen De
Published: February 2011

design scheme of wind-magnetic water heater was proposed in this paper, based on the characteristics of wind energy and the principle of eddy current heating effect. Some factors affected the vortex heat power were analyzed on an equation deduction basis. A device was designed and made for verifying the effect of some factors to the temperature rising of heating plate, including rotary speed and gap between turntable and heating plate. By regression analysis, an empirical equation was derived for guiding further development of the heating system.
Research on the Serialized Design Criterion and Engineering Application
Authors: Lu Zhi Hui , Bo Yue , Zhang Wei
Published: February 2011

The similarity theory and similarity criterion are applied to the series design of non-standard mechanical products. The series design method has been developed by using series design criterion; the similarity criterion of mechanical components or systems is transformed into the series design criterion of product. The series design method of mechanical product is more scientific and faster. The series design criterion is established for the single part of the non-standard mechanical product, and then is extended to the single and complex mechanical system. The series design method with main system and main parameter is put forward, and it is valuable for the complex mechanical system. The series design of rolling pulverization system is carried on by using this method, and the design criterions of the major parts in the system are given.
The Application and the Driver Design of Double Axis Step-Drive Electromotor in the Motorcycle Meter
Authors: Li San Bo
Published: February 2011

The traditional motorcycle meters are driven by the separate motors, these devices are simple and easy to be controlled, stable performance, but dial space has not been fully utilized. This paper introduces the double index show of motorcycle speed and speed，focus on analysis of dual-axis stepper motor driven connections, drive mode and the driver circuit design. The results of experiment and application shows that the coaxial two-pointer motorcycle display instrument has good repeatability, good linear scale, fast response, no jitter, high reliability and relatively small size and many other advantages, instrumentation stepper motor driver with dual-axis motor instrument design meet the relevant requirements of motorcycle meter, can be easily to achieve motor servo system driven synchronous control of double axis step-drive electromotor.
Design of Adjustment Devices of the Weaving Density for Computerized Knitting Machines
Authors: Hu Guo Jun , Qi Han , Zhao Wei Qiang
Published: February 2011

The working principle of the adjustment device of the weaving density for the knitting machine is briefly introduced. Compared to the limitation from the adjustment device of the hand-cranked knitting machine, this paper presents another design method that the device is automatically controlled by the stepping motor to change the weaving density.
Research and Modeling for Bi-Directional DC/DC Converter Based on Formation Technology for Lithium Battery
Authors: Liu Hai Lang , Wang Yi Zhi
Published: February 2011

This paper puts forward a new kind of bidirectional DC/DC topological structure which is used in technology of lithium batteries .It adopts two-stage bidirectional topological structure which called half-bridge bidirectional converter and buck-boost bidirectional converter. This structure can achieve the transformation in the case of large voltage difference between input voltage and output voltage by DSP taking control of buck-boost bidirectional converter. This topological structure is authenticated in the environment of MATLAB/SIMLINK .The result demonstrates that the converter is stable, and can effectively realize bi-directional transformation between 3V battery voltage and 400V bus bar voltage.
Rapid Preparation of Pure Antibodies against Classical Swine Fever Virus from Pig Serum by Immunoaffinity Chromatography
Authors: Wang Gui Zhen , Feng Lin , Li Yang , Li Ren Qiang
Published: February 2011

After Sepharose-4B polymerbeads were activated by using epichlorohydrin, purified swine fever virus as a ligand were binded with them to prepare an immobilized afﬁnity chromatography column, which was used to prepare antibody from high immune pig serum. Equilibrated with pH 7.4, 0.02 mol/L PBS and eluated with pH 3.4, 0.2 mol/L NaAc–HAc buffer containing 0.5 mol/L NaCl, the purified protein obtained from this columne was demonstrated to have normal activity to combine with classical swine fever virus by SDS-PAGE and ELISA. The extraction efficiency of the antibody was 2.45% of total proteins. This study offers a novel, rapid and effective method for preparation of pure antibodies against classical swine fever virus from high immune pig serum.
Studying on Auxiliary Gradient Rings for the Collecting Area of Electrospinning
Authors: Liu Da Li , Zhao Xiao Yu , Zhang Hai Guang , Liu Yuan Yuan , Hu Qing Xi
Published: February 2011

When electrospinning has been used as a special technology of regenerative bone scaffold, for raising the efficiency of electrospinning and decreasing collecting area, the mechanism of bending instability was analyzed and concluded that the force of electric field is a key factor. Auxiliary gradient rings have been added to electric field, which changed the environment of electric filed. Then, it was verified that additive gradient rings could reduce the collecting area. On the other hand, Maxwell was used to analyze the strength and structure of electric field. The maximum intensity of electric field existed in the position of nozzle. The farther apart from nozzle, the rapidly intensity decreased. When auxiliary gradient rings had been added, the intensity of instability stage showed increased trend. Mechanism analysis and experimental result were confirmed by the simulation effectively.
Information Collaboration Model for Modular Product Based on SM
Authors: Song Li Wei , Ji Yang Jian , Qi Guo Ning
Published: February 2011

In the background of globalization, the information collaboration has become more and more frequent. On the purpose of improving the collaboration, we propose this model for modular products based on the SML technology. According to the features of the modular product, this model consists of two sub-models: the unified SM pool model and the information collaboration model. The first one aims for provide unified SM for enterprises. And it also provides the foundation for information collaboration. Based on the features of modular products, the second one makes work on the interface information modeling for modular products. For further illustration, two collaboration applications are introduced in this paper: information collaboration in enterprise and with others. And based on this model, a software platform system is developed to support the collaboration.
Research of the Calculation Method Structure System Fuzzy Reliability Based on the Fault Tree
Authors: Li Nan , Song Bao Wei
Published: February 2011

With the gradual development of the study of mechanical structure design to system-level, When the system is too complex, the traditional method of calculating the structure of fuzzy reliability has been unable to calculate the fuzzy reliability of structural systems. This paper present a system based on fuzzy fault tree reliability calculation method to solve this problem, it expanse the application of fuzzy theory in the mechanical design. The method has been test in the calculations fuzzy reliability of torpedo shell structure.
Coal Mine Safety Monitoring Based on Improved_ID3 Algorithm
Authors: Zhao Yan Qin , Wang Zhen Chong , Jiang Cheng Zhi , Hao Wei Lai , Wang Guo Quan
Published: February 2011

ID3 algorithm is a classic method in the classification of data mining, but it has several limits that the notable one is it can not deal with constant values. This paper introduces a new Improved_ID3 algorithm and make use of it in the coal mine safety monitoring process. It has been proved from the production that Improved_ID3 can not only handle the constant attribute values, but also has higher efficiency when creating the rules. Its application in the coal mine safety monitoring is of great significance.
Empirical Research on the Environmental Effect of Foreign Direct Investment: The Case of Jiangsu Province
Authors: Jia Ming Qing , Yu Jia Yu
Published: February 2011

After opening its doors to the international business scene, foreign direct investment has made considerable contributions to the economic growth in Jiangsu Province. But as a coin has two sides, there is also a negative aspect that we are faced with the environmental degradation. The purpose of this paper is to analyze the environmental effect of FDI and provide some reference to the harmonious development of economy and environment in Jiangsu province. In this paper, we started with a research about a present situation of foreign direct investment and environment of Jiangsu Province, and then we made an empirical analysis on the environmental effect of foreign direct investment in Jiangsu Province, finally we put forward some policy proposals. The sustained growth of foreign direct investment is one of the important causes of environmental degradation in Jiangsu Province. We should improve environment supervision and management in developing FDI.
An Empirical Analysis on Financial Capability and Operating Performance of China’s Listed Tourism Companies
Authors: Chen Jing Pu , Zhang Na
Published: February 2011

In this paper, we made an empirical analysis on China's listed tourism companies’ financial capability and operating performance. We used the SPSS software. We could learn the whole process from table 2 to table 5. This is the first time analyzing the relationship between financial capability and operating performance in tourism industry. The result shows that indicator of sales margin ratio has the most important relationship with operating performance, followed by the debt-to-asset ratio, inventory-turnover ratio and receivables-turnover ratio. The result is significant to the development of tourism industry in the future. China’s tourism companies should use the financial leverage moderately and improve the inventory-turnover ratio and receivables-turnover ratio constantly to make the company's operating performance reach to a new height.
Impulse Response Wavelet Transform Based Bearing Fault Diagnosis
Authors: Li Hui
Published: February 2011

The continuous wavelet transform enables one to look at the evolution in the time frequency joint representation plane. This advantage makes it very suitable for the detection of singularity generated by localized defects in mechanical system. This gives a desirable ability to detect the singularity characteristic of a signal precisely. In this study, the impulse response wavelet time frequency joint representation is used in conjunction to detect and diagnose the bearing fault. The impulse response wavelet time frequency joint representation is found to show distinctive signatures in the presence of bearing inner race or outer race damage. The experimental results show that the impulse response wavelet time frequency representation can extract the transients from strong noise signals and can effectively diagnose bearing fault.
A New Approach for Enterprise Application Integration
Authors: Lu Wei , Zhang Deng Yi
Published: February 2011

In the last few years, there is a significant growth in enterprise computing. In a typical large enterprise, more than thousands major application systems are logically interconnected to support enterprise’s business process. With the Internet technology grows explosively, most enterprise organizations adopt e-business strategy. Enterprises sometimes have to merge with other enterprise, reorganize their internal structure, and adopt new technologies and platform as they strive for competitive advantages. Enterprise application integration(EAI) provides enterprise with the option to leverage their existing systems and integrate them with new application to enhance functionality. Connector, which is a software component, is an essential layer in the EAI architecture. It provides connectivity between application and integration server.
Dilution of Position Calculation for Accuracy Improvement in Wireless Location Systems
Authors: Lin Yung Chuan , Chen Chien Sheng , Shou He Nian , Sun Chi Tien
Published: February 2011

Geometric dilution of precision (GDOP) represents the geometric effect on the relationship between measurement error and positioning determination error. In the calculation of GDOP value, the maximum volume method does not guarantee the optimal selection of the four measurement units. The conventional method for calculating GDOP is to use matrix inversion to all subsets. In this paper, we employ GDOP using the matrix inversion method to select appropriate base stations (BSs) in cellular communication systems. The proposed BS selection criterion performs better than the random subsets of four or five BSs chosen from all seven BSs. The performances of MS location strongly depend on the relative position of the MS and BSs. Therefore, it is very important to select a subset with the most appropriate BSs rapidly and reasonably before positioning.
A Dynamic Collision Detection Algorithm Based on Bounding Box-Tree
Authors: Xiong Yu Mei , Chen Yi Min
Published: February 2011

To satisfy the real-time requirement of collision detection, we presented a dynamic collision detection algorithm based on bounding box-tree. The algorithm had a high detection rate through the establishment of multi-level priority policy when the objects were in the collision state or non-collision state. And it can provide the dynamic spatial and temporal information including collision parts, collision level and the relative speed. The algorithm well adapted to the needs of the dynamic collision detection, and experiments showed that the algorithm greatly improved the efficiency of detection
The Model Design for the Agent-Based Art Major Examination Scoring System
Authors: Wang Jian Hua , Yu Yan , Wang Ni Hong
Published: February 2011

Since the enrollment increase in China’s higher education from 1999, the gross admission rate in China’s colleges has yet reached 24.2% until 2010, and the number of examinees in art majors has also largely increased. The followed issue is the surged workload from exams for the professional courses in art majors. Particularly, the exams in performing art majors need multiple judges to score onsite, the final scores will be calculated by different rules, and then the total scores will be collectively calculated according to different percentages of various courses; and the workload of these tasks jump even more. Countering to the existing deficiencies in traditional manual calculations and computer simple data processing programs, and as well integrating multi-Agent application theories in computer software design, this paper proposes the multi-Agent-based art exam scoring system model and detailedly designs and analyzes the functions of various Agents in the system.
A Method for the Virtual Enterprise to Select its Partners
Authors: Zhou Wen Yong , He Yun Fei , Zhang Jing
Published: February 2011

Multiple factors are required to take into consideration when evaluating the performance of candidates. This paper formulates selecting partners for virtual enterprises as a multi-criteria analysis model, and presents an effective approach by Analytic Hierarchy Process (AHP) and Technique for Order Preference by Similarity Ideal Solution (TOPSIS) for solving the problem. A relatively complete database of indicators for different types of candidate is established first. AHP and entropy are simultaneously uesd to weight these indicators. An empirical example is conducted to illustrate the application of this model. The result shows that the approach can reflect the information emitted by the ratios used.
Simulations and Experimental Researches on Fatigue Life of Sheet-Metal Type Hydraulic Torque Converter
Authors: Hui Ji Zhuang , Wang Wei , Zou Ya Ke , Cao Jie
Published: February 2011

In the paper, the housing of a specific type of sheet-metal type hydraulic torque converter is modeled and simplified by means of three coordinate measuring instrument and UG software. Moreover, the housing fatigue life is simulated and predicted by FLUENT and MSC software platform according to the three-dimensional flow theory. Further tests are launched to research and analyze the fatigue life and testify the simulation. It is proved that the simulation result basically complies with the experiment result. Upon less than 100,000 pressure circulations, the dilatation undergoes linear variations. In this phase, the housing suffers from elastic deformation. When the number of pressure circulation exceeds 100,000, the housing undergoes plastic deformation. Besides, the part of impeller and turbo housing with the largest curvature discontinuity, and the connection between the center and the bearing bushing shall bear a short service life.
A Blind Proxy Re-Signatures Scheme Based on Random Oracle
Authors: Deng Yu Qiao
Published: February 2011

Digital signature schemes allow a signer to transform any message into a signed message, such that anyone can verify the validity of the signed message using the signer’s public key, but only the signer can generate signed messages. A proxy re-signature, which is a type of digital signatures, has significant applications in many areas. Proxy signature scheme was first introduced by Blaze, Bleumer, and Strauss, but that scheme is inefficient and with limited features. After that, some Proxy re-signature schemes were proposed by researchers. This paper constructs a blind proxy re-signatures scheme. Comparing to the previous proxy re-signature schemes, the scheme adds a message blinded feature, and then the security of the scheme is proven.
A New Method of Service Discovery for Mobile Application
Authors: Zhang De Gan , Cheng Ying , Dai Wen Bo , Li Chao
Published: February 2011

In order to improve the efficiency of service discovery for mobile application, we present a new method of service discovery. Reference the ring topology of chord algorithm and the algorithm used by DHT, the traditional single finger table maintained by each node in the ring will be changed into double finger table: the Neighbor Finger Table (NFT) and Long-distance Finger Table (LFT). The LFT can construct small-world network. The new method is different from that, which is by the calculation of the local node, ensure the scope of service can cover the entire network. The simulation shows that the algorithm can effectively reduce the path length of service discovery, improve the service success rate, and control the path length.
A New Method of Machine Learning Based on Examples
Authors: Zhang De Gan , Wang Dong , Hu Yu Xia , Kang Xue Jing
Published: February 2011

A new method of machine learning based on examples is given in this paper. This method improves the classical method ID3 which learns from static examples. Its limits lie on no comprehension and no memory, and no dynamic correlation. In the new method, it can learn from dynamic examples, the change of data can be learned because the training data is the initial and end process in the interval. All varieties and correlation can be understood and remembered. By experiments, the method can be used as classifier and it has special use in the field of information mining.
Understanding the Link between Consumer Decision Making Style and Perceived Risk in Online Business
Authors: Yu Wei Wei , Fu Kun Feng , Cao Gao Fang , Li Ji Hong , Xu Bin , Hu Xi Hou
Published: February 2011

online shopping is becoming more and more common in our daily lives. There are many studies in this field, in which perceived risk is proved to be a very important factor when people considering online business. But the relationship between perceived risk and consumer decision making style has not been studied yet. We use SEM to find out the link between perceived risk and consumer decision making style. As a result, we found fashion and brand style can reduce perceived risk, on the other hand perfect and customary style can increase perceived risk.