bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimized Design of Sun Position Detection Sensor
Authors: Zhong Yu Ning , Zeng Li Xia , Ding Shan Ting , Zhang Xiao Li
Published: October 2011

With the object of optical sensor detects the position of the sun, the working principle of the sun position detection system based on four photosensitive devices was analyzed.The sensitive part of this type of sensors was analyzed with optimization. Silicon photocells were selected as optical elements . The main factors and interactions between them which affect the accuracy of the sensor were analyzed using the idea of orthogonal experiment and related software , the optimal combination for the size of the sensor structure was got.
Research on Small Synchronous Generator Excited System Based on Fuzzy Control
Authors: Wang Guang Zheng , Wang Wen Xing
Published: October 2011

This article describes the small synchronous generator excitation control device characteristics and working principle is proposed based on fuzzy control of excitation regulator device on-site test method. Phase compound excitations with voltage corrector by the way of magnetic amplifier were used in excitation devices. The generator terminal voltage, load current and power factor and other parameters were adjusted by fuzzy control through automatic control phase compound excitation transformer. For separate generator, the major factor of terminal voltage change was caused by the change of reactive current, in order to keep constant voltage generator excitation current mast be adjusted. At the end of the paper the problems and countermeasures in the course of debugging process were analyzed.
An Active Control Method for Chaotic Motion of Fluid Conveying Pipe under Harmonic Excitation of Supports
Authors: Bao Ri Dong
Published: October 2011

The chaotic motion of a single mode system of the fixed supported pipe at two ends under the base excitation was actively controlled by introducing the feedback of notch filter. The equations of both homoclinic and periodic orbits of the unperturbed system were derived firstly, and then the corresponding Melnikov functions were deduced. Based on the conditions that the Melnikov functions corresponding to the homoclinic and periodic orbits respectively had themselves simple zeros, the conditions that parameters should satisfy to introduce the chaotic motion of the system into periodic orbits could be obtained. Lastly, numerical simulation was used for the response of the perturbed system, and the simulation results showed that the system’s chaotic motion can be successfully induced to periodic motion. For different feedback gains of the notch filter, the responses of the system would converge on different stable periodic solutions.
New Structures and Materials for Next Generation Photonic Technology
Authors: Zhang D. H , Mei T. , Tang D.Y. , Yuan X. C. , Chen T. P.
Published: October 2011

We present the main results achieved in light source, light manipulation and imaging and sensing in our competitive research program. In light source, we have for the first time developed grapheme mode-locked lasers and dark pause lasers as well as nano-crystal Si based light emitting devices with colour tunable. In light manipulation, loss compensation of surface plasmon polaritons (SPPs) using semiconductor gain media was studied theoretically and demonstrated experimentally and the SPP propagation can be controlled through electrical pumping. Microring resonators based on silicon on insulator and III-V semiconductors technologies have been successfully fabricated and they can be used as filter and switch in the photonic circuit. In imaging and sensing, both SPP and metamaterial based lenses are developed and resolution far beyond diffraction limit in visible range has been realized. Broadband photodetectors based on dilute nitrides are also demonstrated.
The Kinematics Analysis of Bulldozer Multi-Freedom Working Device
Authors: Zhang Fu Sheng , Xu Ge Ning
Published: October 2011

In order to conduct kinematics Analysis accurately, mechanical model and mathematical model are established about bulldozer multi-freedom working device. Appling bar-groups method, the up-and-down movement of the bulldozer working device was analyzed based on planar linkage with the Assur group theory in the kinematics. The analysis theory of the application space agency carried through for rotary motion, roll motion, and a combination of the two movements, kinematics analysis, established the force balance equation and obtained for the mechanism optimization, structural design, strength and stiffness analysis of the bulldozers working device, provides a new method which is provided with considerable reference value to general mechanism design and analysis.
Preparation of C/Cu Composite Powders by High-Energy Ball Milling
Authors: Guo Xiu Yan , Ma Guo Jin , Xie Shi Kun , Yi Rong Xi
Published: October 2011

Cu-4%C mixed-powder consisting of rough copper powder and graphite powder was separately mechanical alloyed by high energy ball milling. The phases and micrograph of these powders were determined by X-ray diffraction and scanning electron microscopy (SEM). The results show that increase of the lattice parameter of copper with milling times, up to a saturation value of about 24h; The absence of graphite reflections in X-ray diffract grams for longer milling times.
Research on a New Model of MBD-Based Machining Process Design
Authors: Wan Neng , Yang Yang
Published: October 2011

In order to change the incompleteness of data link, tediousness of data conversion and unclearness of process expression in the traditional two-dimensional machining process design, this paper researches on a new model of MBD-based one. The author proposes the 3Dprocess model as the carrier to manufacture information, and establishes closed loop architecture composed of 3D machining process design, 3D process management and feedback of field application of 3Dmachining process. The author then analyzes the composition elements of machining process model under the condition of MBD, proposes the establishment of machining process ontology and geometric modeling ontology, and achieves the conversion between these two. This paper researches on the composition of MBD machining process card, establishes the mapping relation between process expression elements and process card elements in the 3Dmachining process model, and ultimately realizes the machining process design in the 3Denvironment.
Research on Risk Assessment of Farmers’ Microcredit Based on BP Neural Network
Authors: Ji Wei , Zhang Xue Fang
Published: October 2011

Our government always pushes hard forward the farmers’ microcredit of the rural credit cooperation. But actually, its risk is higher than other kinds of loan. Based on analyzing the risk of farmers’ microcredit, this paper builds risk assessment index system of farmers’ microcredit by using BP neural network. Through the paper, it can provide essential support and practical application for relative departments of farmers’ microcredit.
The Research on Modeling of Design of Product
Authors: Zhang Yu Xian , Men Xiao Shuang , Yao Fang
Published: October 2011

Product design is a complicated thinking activity of creation of human. Based on analyzing product design and its process, using a theory and method of aggregating and mapping, models of product design, process of product design, process of conceptual design of product were constructed, a frame of network arithmetic of a process of conceptual design of product was presented, its flow of decomposition and integration was particularly defined, a good base for modeling and ruling of process of product design was founded. At the same time, a useful exploration of development of a computer support implement for process of product design at all life cycle was made.
Double-Crossed Step-Stress Accelerated Life Testing for Pneumatic Cylinder
Authors: Chen Juan , Wang De Yi , Fu Yong Ling , Qi Xiao Ye
Published: October 2011

This paper discusses the principle and method of Double-Crossed Step-Down-Stress Accelerated Life Testing (DCSDS-ALT) for pneumatic cylinders. As to pneumatic cylinder, the step-down-stress testing failure physics can be described as cumulative degradation model. Temperature and frequency are normally chosen as the test stresses. The failure data obtained under DCSDS-ALT testing steps can be converted to those under constant stress testing. And the reliability specifications can be derived accordingly. To compare Double-stress ALTs with traditional constant stress testing shows Double-stress ALTs can meet the accuracy demand. The 5% of average lifetime estimation error and 1.85% of the characteristic lifetime error are very satisfying for pneumatic industrial lifetime prediction.
The Product-Mix Optimization with outside Processing Based on Theory of Constraints Oriented Cloud Manufacturing
Authors: Zheng Bing , Gao Yi Cong , Wang Yun
Published: October 2011

In order to solve the multi-objective product-mix optimal problems oriented cloud manufacturing, SPEA2+ is used to realize the outside processing problem of lifting cross sliding trimensional parking equipment (multi-section trimensional parking equipment), which oriented cloud manufacturing. The outside processing problem is formulated as a multi-objective optimization problem and identified an analytical solution. The case illustration of parts of PSH2 lifting cross sliding trimensional parking equipment is taken as an example, examining the multi-objective optimization model. The model enables managers to determine which products to manufacture and which to outside processing. The solution of the multi-objective optimization formulation enables managers to apply the model by computing an operational ratio. The final model is simpler to apply and requires the computation of fewer variables than other prevalent models.
Effects of Rare Earth on Porous Metal Bonded Diamond Composites with Different Porosity
Authors: Liao Cui Jiao , Xu Hua , Hai Zeng Ping
Published: October 2011

Two groups of porous metal bonded diamond composites (PMBDC), with and without rare earth (RE), were compacted and sintered under the same conditions. The effects of RE on the transverse rupture strength (TRS) and fractography of fracture surfaces (FFS) of PMBDC having different porosity were investigated. From the TRS and FFS’s perspective, the composites with RE are better than those without RE. Furthermore, the result suggests that there is a critical porosity where there are very apparent effects on the TRS and FFS. If the porosity of the composites is less than the critical value, the effects of RE increase with the porosity; if the porosity is larger than the critical value, the effects drop with the porosity instead.
Design on Support Training System of High-Speed Wheel Engineering Equipment Based on Virtual Reality
Authors: Jiao Yu Min , Wang Qiang , Su Fan Tun
Published: October 2011

Based on the analysis of the structure characteristics of high-speed wheel engineering equipment, a design method for virtual support training systems was presented, founded on virtual reality (VR), software engineering, process simulation technology. According to the function requirements, the system software and hardware platform were established. Combined with practical teaching needs, virtual support system of high-speed wheel engineering equipment was developed. The practice demonstrates that the system has high practical value and guiding significance on the aspects of talents cultivation, the teaching application, science research, etc.
Analysis of Quality Crisis and Recovery Model of Regional Brand Market
Authors: Tong Guang Ji , Wang Wei
Published: October 2011

Because of the different influencing factors, the defective market of regional brand would be contrary to Akerlof adverse selection model, it will still exist. Therefore, this paper establishes the consumer incentive model and local government regulation model. Models shows: Defective market will gradually revert to genuine market by raising prices, improving product information penetration, increasing penalties and reducing inspection costs. Using the adulteration scandal about Wuchang "rice flower" as a case sample enhances the credibility of theoretical research findings.
Model Updating of a Steel Truss Based on Artificial Neural Networks
Authors: Zhang Shi Lei , Chen Shao Feng , Wang Huan Ding , Wang Wei
Published: October 2011

Based on the artificial neural network, the parameters of a steel truss are identified. And the finite element model of truss is corrected. In order to improve the efficiency of model updating by artificial neural networks, the momentum is introduced into the back propagation algorithm. Based on the theory of probability and mathematical statistics, the expectation confidence interval of the measured deflections and strains is obtained. In this way, the samples to train the neural network are optimized. The numerical results show that the back propagation neural network proposed on this paper is able to correct the finite element model of the truss effectively.
Investigation of the Milling Performance about 7050-T7451 Aluminum Alloy Based on Orthogonal Experiment
Authors: Tang Ke Yan , Zhou Li Hua , Song Li
Published: October 2011

The high-speed milling process has been widely used for manufacturing the aeronautical aluminum alloys. And it is quite important to choose the logical milling parameters for improving the precision and surface quality in the high-speed milling aluminum alloys. In this paper, the orthogonal experiments are designed and made to construct the relationships between the milling force and milling factors to 7050-T7541 aluminum alloys. The milling factors are mainly consist of the milling speed, the feed rate, the milling depth and the milling width. The empirical formulas of milling force are derived by multiple linear regression analysis, and the formulas are tested to be correct by the single factor experiment. The research is very important for further study of the aluminum alloys.
Research of Theoretical Analysis and Structural Design of Active Wheel
Authors: Zhang Xu , Li Li Wei , Cui Wei Wei , Cui Ji Jun , Cao Yang , Zhao Hai Rong , Hao Guo Quan , Feng Zhi Bing , Li Song Yang , He De Fang
Published: October 2011

Drive system of wheel motor is getting more and more attention by automobile manufacturers and researchers. In this paper, a novel drive system of electric vehicle with two degrees of freedom is given, with active wheel driven by two motors, which can work freely under three modes of single motor low speed, double motor high speed and regenerative braking. Furthermore, theoretical analysis based on mechanical dynamics is implemented for all these modes. Detailedly, on an experiment and design platform of a mini electric vehicle, comprehensively considering and balancing structure dimension of testing prototype and expected performance requirements, design of overall structure of the active wheel is accomplished.
Empirical Analysis of R&D Investment Effect to Chinese Rural Infrastructure on Economic Growth of Agriculture
Authors: Tong Guang Ji , Zhao Dong Hui
Published: October 2011

This article made an empirical analysis by utilizing data from 1990 to 2009 in China,The co-integration test indicated that there existed a long equilibrium relationship between public investment to agricultural research and development and agricultural growth during long period. Pulse response function showed that impact of agricultural growth to public investment to agricultural research and development presented certain negative responses during short period; positive responses during long period, and presented an accelerating trend. Variance decomposition to agricultural growth also showed that effect of public investment to agricultural research and development was not distinct during short period, but the positive effect of research and development would be highlighted over time, and there was a significant influence on agricultural growth.
Dynamic Test Experimental Studies on Printing Pressure Based on Two-Dimensional Holospectum
Authors: Chen Yi Jun , Zhao Qing Hai , Bai Jing Yi
Published: October 2011

a proper printing pressure is a basic condition for realizing offset printing and is also quality guarantee of printed products. The printing pressure should be adjusted on time according to different thickness of paper and requirements. At present, the printing pressure is mainly tested statically and pre-commissioned by experiences, so it can not reflect size of the real printing pressure and no dynamic commissioning can be carried out. In this paper, the hoho-spectrum analysis method was adopted to analyze the vibration displacement signals of cylinders, so as to obtain central displacement of two cylinders and distance and to indirectly obtain pressure between the two cylinders. The test results showed that the method could test the printing pressure effectively and dynamically.
Research on Gait Analysis and Planning of Quadruped Search-Rescue Robot
Authors: Wang Peng , Li Xin , Jiang Wen Hao , Kang Shao Chen , Xin Jing Lei
Published: October 2011

The search and rescue robot has the characteristics of quadruped walking machine. According to the actual structure of the quadruped robot body，the walking pose of the robot are planned，based on the study of the animal gait．The distributions of degrees-of-freedom is analyzed to ensure stable walking. A simulation model of quadruped search and rescue robot is established in ADAMS, and the motion characteristics of the system are observed using the simulation model established. Simulation results show that the motion characteristics of the system are closed related to the length of stride.
Three-Dimensional Modeling and Analysis for Runner Blades of Turbine
Authors: Xiong Juan , Sun Lan Feng
Published: October 2011

In order to improve the design and the two-dimensional drawing identifying technology of freeform surface for the complicated components, such as turbine runner blades, based on the strong modeling technology of CAD/CAM and the software UG of CAD/CAM, detailed analyses three-dimensional modeling of turbine runner, then explain the design difficulties and three-dimensional effect of freeform surface, in order to resolve part of the design difficulties of freeform surface. Provide the original database for computer auxiliary fabricating and explain the practicability of CAD/CAM by analyses three-dimensional modeling of turbine runner.
The Development and Research of Welding Power Source Testing Devices Based on ARM Controller
Authors: Lin Xiao Jun , Liu Zhe , Liu Jun
Published: October 2011

The performance of arc welding power source is an important factor that affecting the use safe and welding quality, so a special equipment for the factory testing is required. The test equipment for arc welding power supply is master-slave structure, and includes hardware and software system. Hardware system complete data acquisition and information display, controlled by embedded micro-controller. The software system complete a graphical user interface programs and collection procedures, developed in the embedded Linux environment. The device enables the automated testing of the welding power source, such as loading, data transmission, reflecting a good man-machine interactivity. The system will be applied to the factory inspection of welding power source, to assess its the quality and performance through tested parameters.
Experimental Study on Clear Water Scour around Bridge Piers
Authors: Hong Yao Ming , Chang Min Li , Lin Hsueh Chun , Kan Yao Chiang , Lin Chi Chang
Published: October 2011

This study analyzed the characteristics of bridge scoured by clear water according to 14 groups of laboratory experiments. The formulation of critical velocity based on historical equations of clear water scour was concluded for the test circumstances in laboratory. The experimental conditions include the variation of flow velocity, sediment cover depth, and diameter of bridge pier/bases. The erosion status prior to the maximum scour depth was recorded by a pinhole camera, and, in general, the equilibrium scour depth was reached after 24 hours. The maximum scour depth increases as the sand cover depth decreases. As the same sediment depth, the fast flow velocity will induce the deep scour depth with respect to the slow flow velocity. The same result can be observed for the large diameter of pier (or base) versus the small one. The maximum scour depths in the front of the pier are always deeper than that behind the pier.
Design Element Concept of Die Casting Process
Authors: Ahmad Rosli , Sa'ude Nasuha , Amin Azriszul Mohd
Published: October 2011

Design Element Concept of die casting process was explored. Direct Differentiation Method (DDM) was employed to calculate the Design Element Sensitivities of die casting process. The mathematical formulation of the DDM method was derived. The results obtained from the DDM method was compared with Finite Difference Method (FDM) and the results showed closed agreement.
Dressing Electric Spark Parameters of Cast Iron Agglutinant Abrasion Wheel
Authors: Wang Hai Bin , Guo Yan Ling , Zhang Fei Hu , Luo Song Bao
Published: October 2011

The dedicated wheel dresser was used for the aspheric surface curve grinding device Nanosyhs-300. The dresser can deal with diamond wheel of the cast iron binding agent for electric spark reshaping and on-line electrolysis repairing sharp. Discharge parameter on the reshaping accuracy and efficiency was studied in the reshaping processing. Therefore, a group of discharge parameters for emery wheel dressing were obtained.
Scheduling Research of AGV with Double Buffers Based Genetic Algorithm in Flexible Manufacturing System
Authors: Ren Nai Fei , Zhao Yan , Zhang Jun
Published: October 2011

Aiming at solving scheduling problem of flexible manufacturing system, this paper puts forward a FMS scheduling problem where single AGV with two buffers system is to be considered. Such an AGV with two buffers system was replaced with double-buffer AGV system in the next content. To solve FMS scheduling problem with double-buffer AGV system, a mathematical model which integrated double-buffer AGV and jobs was designed. And an improved genetic algorithm is proposed to sequence processing of jobs and the moving path of double-buffer AGV. The experiments made in simulation FMS production line laboratory realized scheduling integration of jobs and AGV, meanwhile, experiments gained processing sequence of jobs on each machine and moving path of AGV. Contrasting results of double-buffer and no-buffer AGV system verified double-buffer AGV system has higher feasibility and effectiveness.
The Kinematics Analysis and Study on Triangular Elbow Servo Press
Authors: Qiu Ying , Li Wei Min , Wei Zhi
Published: October 2011

Servo presses are widely used in high-precision, complicated forming process fields and promoted around the world in recent years. It is the trend of forging machinery for its servo motor-based digital heavy haul driven technology. At present, it becomes the hot research field. The structure characteristics of triangular elbow servo press were firstly introduced in the paper. And then the kinematics mathematical model of triangular elbow transmission mechanism was deduced and given. Based on it, this paper provides the slider kinematics analysis by Matlab. The slider motion law under various parameters can be analyzed and compared. The results would be useful reference for optimization design of transmission mechanism. The case study provides more visual and reliable decision basis for designer.
The Design and Implementation of Multiple Square Wave Pulse Sequence Recorder
Authors: Jiao Xin Quan , Yao Yong Xing , Meng Qing
Published: October 2011

For the need to test square wave pulse sequence, designed and implemented a recorder. Recorder using FPGA for judging square wave pulse’s edge and precise timing functions, using C8051F MCU to storage the results of time-series data and printing functions, FPGA and MCU using a custom protocol for data exchange and command transfer. After experimental verification, the recorder have 1ms accuracy to record 28 roads square wave pulse signal timing, and fixed-format print the results.
Research on Component Retrieval Method Based on Faceted Classification Described
Authors: Liu Yan Pei , Wang Jian Ping , Chen Jun
Published: October 2011

With the development of component technology and component library expansion, component representation and retrieval technology as the component library management two core technologies has become a research hotspot. According to the current widely used methods described and characteristics of components faceted classification, this paper starting from component reuse by different search methods，based on view search method、based on faceted search method、based on terms retrieval method three kinds of term component retrieval methods and the corresponding model of the five matches and two matching algorithms are proposed. Theoretical analysis and experimental results show that the three kinds of retrieval methods used in large-scale component library component retrieval, to meet the component reuse of various search requirements and the retrieval efficiency is feasible.
The Influence of Rhombus Cross Track Laser Remelting on Tribological Properties of Lubricating Wear-Resisting Coating Prepared Plasma Spraying
Authors: Zhao Yun Cai , Hao Gao Jie , Liu Xiao Mei , Deng Chun Ming , Ma Wen You
Published: October 2011

This paper is about the KF301/WS2 lubricating wear-resisting coating of diamond textured surface modification which is prepared by supersonic plasma spraying, laser remelting coating and surface micro moulding, and coating’s tribological characteristic is studied under room temperature. It indicates that the diamond texture has a certain influence on abrasion loss and friction factor of coating’s surface. In the initial stages, fiction coefficient of untextured surface is about 0.0138, while fiction coefficient of textured surface is about 0.0115, compared with the former, the latter is obviously better and decreases 17%; When wear time reaches to 1 hour, abrasion loss of untextured surface is 0.03mg, and which of diamond textured surface is about 0.018, compared with the former, the latter is obviously better and decreases 40%. Tribological characteristic of diamond textured surface is higher than untextured surface.
A Case Study of Contact Analysis of Toy Car Shell Structure with Compound Surface Model
Authors: Hsieh Ming Chu , Lai Chia Hung , Lai Kuo Tian , Lin Alan C
Published: October 2011

Nowadays in many cases of product shape modification where no original design drawing is available, equipments like coordinate measuring machine and rapid prototyping machine are very often employed, together with modification software, to attain integrated technology for product shape modification in a relatively short period of time. This study conducts the measurement of the outer shape of existing complex model and puts it through different steps such as data points acquisition, surface filling, and surface fitting. As the collision testing of physical object is not available, CAE software ANSYS Workbench is therefore used for contact analysis to determine the area of stress concentration after the collision for consequent modification of the shape. Contact analyses before and after the modification are then compared. In the last step, the modified geometric shape is used by the rapid prototyping machine to produce a product prototype for the manufacturer to display. This modification procedure can be widely applied in car manufacturing industry, mobile phone industry, product form design related industry, and so on.
A Novel Recurrence Method for the Fast Computation of Zernike Moments
Authors: Qin Hua Feng , Qin Lan , Liu Jun
Published: October 2011

A new method is proposed for fast computation of Zernike moments. This method presents a recursive relation to compute the entire set of Zernike moments. The fast computation is achieved because it involves less addition and multiplication operations. The experimental results show that the proposed method for the fast computation of Zernike moments is much more efficient than existing fast methods in most cases
Applying of Information Technology in Mathematics Teaching
Authors: Wen Jing Hua , Zhang Mei , Yu Xi
Published: October 2011

With the rapid social development, information technology has become a kind of background information society culture. Modern information technology in mathematics teaching, widely used, can be changed for fun, experience dull knowledge acquisition, Change to move, static highlight the importance and break through the difficulty, Change single for multivariate, increase the knowledge the density, Feedback timely, facilitate teachers adjusting teaching behavior. This paper mainly discusses PowerPoint and Matlab7 software in the teaching of mathematics applying.
Automatic Construction of Entity Semantic Representation Model Based on Dependency Analysis
Authors: Liu Xiao Ming , Liu Jie , Li Fang Fang
Published: October 2011

The entity semantic representation model (ESRM), which considers an entity as a set of attributes and corresponding values, is very useful for various applications. This paper proposes an approach for extracting new attributes and values from related unstructured documents. In our approach, the extraction process is formulated as the sequence labeling task. According to the predefined entity structure, the labeled data for training annotator are achieved automatically. The CRFs based annotator is trained to annotate the sentence which maybe contains the new attributes and values. And then, in terms of a decision process with scoring algorithm, new attributes and values are identified and fill into the predefined entity representation model. The experiments show that the proposed method improves the performance of extraction with a higher accuracy.
Automatic Red Blood Cell Classification for MICAD Based on PSO-CSVM
Authors: Wang Rui Hu
Published: October 2011

The automatic classification of erythrocyte is critical to clinic blood-related disease treatment in Medical Image Computer Aided Diagnosing(MICAD). After 3D height field recovered from the varied shading, the depth map of each point on the surfaces is applied to calculate Gaussian curvature and mean curvature, which are used to produce surface type label image. Accordingly the surface is segmented into different parts through multi-scale bivariate polynomials function fitting. The count of different surface types is used to design a classifier for training and classifing the red blood cell by means of support vector machine and particle swarm optimization. The experimental result shows that this approach is easily to implement and promising.
Construction of E-Government Performance Management in the Angle of Service Government
Authors: Hu Xin Li
Published: October 2011

The performance management of e-government is crucial for e-government construction which can realize the orientation function to directly influence the e-government constructing level. This paper attempts to build e-government performance management system in view of service-oriented government from micro and macro perspective, to enhance its service quality and public satisfaction. This paper defines performance management and e-government performance management system in view of service government, in this basis, build e-government performance management system in view of service government from the perspective of the macro and micro system, meanwhile in order to establish e-government performance management system comprehensively, the article finally stated the problems we should pay attention to when building performance management system. The article builds the macro model of e-government performance management system, and also built the static of five system and dynamic system of PDCA cycle system in micro-system.
Design and Realization of One Circuit Board General Test System Based on USB
Authors: Lei Lei , Zhuo Jia Jing , Chen He , Luo Xian Feng , Peng Wei
Published: October 2011

According to one system circuit board testing needs，one general circuit board detection system based on USB is designed，which achieve interactive testing on system multiple electronic subassembly and automatic testing on circuit board.The system hardware platform and software architecture and key technology is given in this paper.
Design of Output Filtering and Repetitive Controller of Photovoltaic Inverter
Authors: Wang Ping , Chen Liu Ye , Wang Chao Qun
Published: October 2011

The paper proposes the design method of output filter and repetitive controller of inverter in stand-alone PV system. The design of filter considers the impact of filter on the inverter main circuit in order to increase the stability of the inverter. For the serious waveform distortion when the inverter runs independently with non-liner load, the circuit introduces repetitive control and presents a new parameter design method of repetitive controller. The simulation results prove that the design method is correct and feasible.
Determination of Singularity-Free Zones in the Workspace of Planar Parallel Mechanisms with Revolute Actuators
Authors: Li Shu Jun , Gosselin Clément
Published: October 2011

The singularity-free workspace of parallel mechanisms is important in the trajectory planning and the kinematic design of the mechanisms. The planar parallel mechanism with revolute actuators, which the expression for the singularity locus and the algorithms for determining the singularity-free zones involve both the Cartesian and the joint variables, has been studied in the paper. Algorithms are proposed here to simplify the determination of the singularity-free zones in Cartesian space. The methodology and procedures for determining the singularity-free zones of planar parallel mechanisms with revolute actuators are introduced. The numerical results show that the simplified algorithms and the techniques are correct and efficient in determining singularity-free zones in the workspace of planar parallel mechanisms.
An Analytic Solution of Length-Limited Thin-Walled Cylindrical Shells under Non-Axisymmetric Uniform Line Load and Concentrated Load
Authors: Zhao Jian Bo , Bai Xiang Zhong , Si Xiu Yong
Published: October 2011

Solution for length-limited thin-walled cylindrical shells' deformation and stress state under non-axisymmetric uniform line load and concentrated load conditions, such as containments of rail guns, is a common engineering problem. Based on fundamental equations of the above problem, load function and displacement function are presented, and displacement and stress analytic solutions are obtained by Galerkin Method in this paper. The analytical solutions are verified by comparing them with ANSYS numerical solutions of an example problem. The results of this paper can be served as a reference for analytic solutions and engineering designs of non-axisymmetric cylindrical shells.
Hybrid Force/Position Control Investigation of Parallel Machine Tool with Redundant Actuation
Authors: Tang Hai Tao , Yao Jian Tao , Cheng Li , Zhao Yong Sheng
Published: October 2011

A novel redundantly actuated parallel machine tool was introduced. The inverse kinematic of 5-UPS/PRPU PMT with redundant actuation was analysed and the driven force of redundant actuation limb was planned. The force/position hybrid control strategy and dynamic differential calculation control strategy were proposed. Then the experiment of evaluating dynamics in the position control mode and in the force/position hybrid control was carried out respectively. The experiment shows that, the force/position hybrid control can improve driven torque of each limb better, balance the load of each limb and is of great help for enhance the dynamic performance of entire PMT.
Intelligent Monitoring and Prediction of Surface Roughness in Ball-End Milling Process
Authors: Tangjitsitcharoen Somkiat , Senjuntichai Angsumalin
Published: October 2011

In order to realize the intelligent machines, the practical model is proposed to predict the in-process surface roughness during the ball-end milling process by utilizing the cutting force ratio. The ratio of cutting force is proposed to be generalized and non-scaled to estimate the surface roughness regardless of the cutting conditions. The proposed in-process surface roughness model is developed based on the experimentally obtained data by employing the exponential function with five factors of the spindle speed, the feed rate, the tool diameter, the depth of cut, and the cutting force ratio. The prediction accuracy and the prediction interval of the in-process surface roughness model at 95% confident level are calculated and proposed to predict the distribution of individually predicted points in which the in-process predicted surface roughness will fall. All those parameters have their own characteristics to the arithmetic surface roughness and the surface roughness. It is proved by the cutting tests that the proposed and developed in-process surface roughness model can be used to predict the in-process surface roughness by utilizing the cutting force ratio with the highly acceptable prediction accuracy.
Optimization for Pipeline System of Air-Conditioner Based on Finite Element Simulation
Authors: Li Su Yang , Guo Jun , Zhang Xiao Wei , Tang Wen Yan
Published: October 2011

Modal analysis was carried out to calculate the natural frequencies and vibration modes of 20 orders for a certain pipeline system of the outdoor machine of air-conditioner using finite element simulation. Excitation was exerted on the pipeline system for harmonic analysis, and the optimized design was proposed based on the analysis of simulation results. Results prove that the design by changing the direction of pipeline is more effective than that one by adding damping blocks to improve the natural frequency of pipeline system, and the optimized design can avoid the resonance zone of the working frequency of compressor. Besides, the maximum vibration displacement is also greatly decreased.
Research of Simulation Software Architecture Optimization Used with Components Based on Reach-Ability Matrix
Authors: Nan Song Hui , Liao Xue Jun , Jiang Nan
Published: October 2011

For the sake of meeting the requirement of simulation applying and simulation surroundings changing, Simulation Software Architecture (SSA) always use the means of Software Reuse. Along with the expand of component stock, the size and the architecture of SSA become more and more complex. How to optimize the architecture becomes the problem when we exploit software. This text creates the concept model of SSA architecture, using reach-ability matrix, defining the concept of Component Contribution Degree (CCD) and Component Reliant Degree (CRD), provides the measure of quantitative analysis the architecture. In particular, this text gives the rule of optimize when we add or delete or coalition etc, it’s a fine strategy of developing software and optimize architecture.
SIMULINK Simulation of ADRC Based on S Function
Authors: Ma Yong Guang , Ran Ning , Jia Ning Bo
Published: October 2011

The method to analysis the advantages of S Function and Auto-Disturbance-Rejection Control(ADRC)[1]. Basing on the MATLAB/SIMULINK as the simulation platform, three function blocks were constructed adopting the S Function and the subsystems’ encapsulation was realized as well according to the discrete algorithm of the Nonlinear State Error Feedback(NLSEF), the Tracking Differentiator(TD) and the Extended State Observer(ESO). By conducting the simulation example of the main steam temperature control system in a certain thermal power plant, the correctness and the effectiveness of the ADRC have been demonstrated.
Study of Airport Crash Fire Vehicle Dynamics Simulation Model
Authors: Wang Li Wen , Yuan Da Meng , Wang Hao
Published: October 2011

By using forward modeling and backward modeling synthetically, a dynamics model, including engine module, powertrain module, fire control system module and velocity module, is established preliminarily for airport crash fire vehicle training simulator. Simulation is performed in the airport crash fire vehicle simulation test platform. Finally real vehicle test is carried on. By contrasting simulation with experiment result, it is concluded that the dynamics model is reasonable and feasible and could satisfy the need of airport crash fire vehicle training simulator.
Study on Support Vector Machine Based on Nonlinear Correction of Double Parallel Beam Weighing Transducer
Authors: Zhao Li Hua , Wang Ke Qi , Xie Yong Hua
Published: October 2011

According to the non-linear problem caused by temperature and circuit interference during the detection process of the double parallel beam weighing transducer, a nonlinear compensation method is proposed based on the support vector machine theory. The nonlinear characteristics of measured values of sensor are analyzed, and the support vector machine (SVM) inverse model is established while the displacement parameters as the output and voltage parameter as input. The effectiveness of SVM inverse model is verified by the simulation. Compared with the RBF neural network model, the SVM model is efficiency. The average error of the model prediction is 0.027g mm, so it has good linearity, and nonlinear compensation of the double Parallel beam weighing transducer is realized.
The Double Role Piston Pump Based on the Symmetrical Gears and Crank-Link-Slider Mechanism Driven by Servo Motor
Authors: Wang Ming Di , Song Qiang , Zhong Kang Min
Published: October 2011

The double role piston pump based on the symmetrical gear and crank-link-slider mechanism driven by servo motor is innovated, its working principle and technical characteristics are introduced. In this new type of piston pump, the hydraulic cylinder piston is drived, and the velocity can be adjusted, but the flow pulse of a single pump is undoubtedly great. So two piston pumps are adopted, whose velocity are controled by NC, then the variable stepless timing in wide range can be achieved. If the velocity in this two pumps |v1|+|v2|=C (C is a constant), the flow curve of two pumps will be coupled into a straight line, in order to achieve constant flow output without the need of complex and inefficient throttle controlling loops, and there has not any power machines and mechanical parts in high-speed rotation ,and the noise pollution is very low. According to the varied circumstance, the high and low pressure conversion can be achieved when the angle velocity in this piston pump is controlled by the instructions. It is also very easy to achieve the dynamic and intelligent control.
The Internal Operation Mechanism and the Efficiency of Macro-Economic Assessment in Weifang City
Authors: Ma Jun Hai , Meng Xiao Lei
Published: October 2011

On the basis of the studies done by scholars at home and abroad,we have a research on macroeconomic performance , regional economic development and efficiency of Weifang City based on the regional economic and industrial economic theory , And make an analysis of the industrial structure, state and existing issues of Weifang City based on it; Through a method of comparative , we analysis the internal structure’s change of Weifang City’s economic and advantages in geography in Shandong Province , have an analysis of the typical factor which affect its efficiency level, find the future position of regional economic development in Weifang City based on it . At last, made the corresponding policy recommendations to the regional economic development and industrial system optimization of the Weifang City.
The Optimization of State-Owned Enterprise Group Development Model Based on the Method of DEA
Authors: Ma Jun Hai , Zhang Qi , Ma Chun Yong
Published: October 2011

Based on the work at home and aboard.We evaluate the efficiency of group ownership of state-owned enterprises with the method of data envelopment analysis . And through "projection principle" can be achieved given its theoretical peak. We obtained the actual efficiency through the actual data after the DEA analysis of the group ownership of state-owned enterprises in Shandong Province in 2009.Given the appropriate management and economics analysis,and effective ways for business decision makers to evaluate and improve understanding of such enterprises the optimization of resources between various departments and coordination. It has a strong theoretical and practical application.
Thinking the Hedge Strategies during the Financial Tsunami by Data Mining: A Case Study of Taiwan Stock Exchange
Authors: Chen Shih Chih , Liu Shih Chi , Chen Huei Huang , Tzeng Jang Ruey
Published: October 2011

After Taiwan becomes the 144th member of the World Trade Organization (WTO) on 2002, it also becomes a part of the global economic system. Therefore, when the financial tsunami influenced the global economy in 2007, it was inevitable that all transactions and professions in Taiwan could hardly survive, and the securities industry, of course, bore the brunt. Based on the exchange data of a Taiwan K-broker's orders, this research conducts an empirical case study by means of Data Mining. We adopt RFM (Recency, Frequency, and Monetary) modeling index to get the data, and then group the customers by Cluster Analysis of K-means and find out the transaction behaviors of indicative customers in each group around the financial tsunami. Finally, we summarize those users behavior of the hedging operations to be the reference models Taiwan stock market during the financial tsunami.
A Study on Model Transformation Mechanism Using Graph Comparison Algorithm, Abstract Factory Pattern and Bridge Pattern
Authors: Ko Jong Won , Song Young Jae
Published: October 2011

In order to easily port mobile applications suitable for each platform, that have been developed under diverse development environment for individual wireless communication service providers, or redevelop them on a specific platform, it is required to reuse them at software model level that is a software development paradigm for MDA (Model Driven Architecture). Verification of existing design models and test models for the study, mainly checking (Model Checking) with a code-based software designed to define in the abstract syntax tree or on the models generated using refactoring on design models for refinery operations and define how to perform. The problem with these traditional research methods, but the first model, design model for checking the information with the model by defining a formal representation in the form of an abstract syntax tree, as you've shown how to perform verification of the model to perform refactoring. Additional steps need to define more complex due to a software problem that is not the way to the model suitable for optimization refactoring. In this paper, as defined in the MDA-based model transformation studies of a reusable model transformation patterns, abstract factory pattern and the bridge pattern given the pattern information automatically through the software model offers a way to perform refactoring..
Anti-Pulls Out Strength Research on Concretes Component of Low-Alloy Coupled Steels and Cold Rolling Belt Rib Steel Bars
Authors: Gao Bing , Wang Bo , Zou Jian Qi
Published: October 2011

Both Low-alloy Coupled Steels and Cold rolling belt rib steel bars are cold finishing steel bars. In project practice, Anchor ability of Low-alloy Coupled Steels Concrete will higher than cold rolling belt rib steel bars. So, more economical steel bars and cement contents. Through comparative trial about on concretes component of Low-alloy coupled steels and cold rolling belt rib steel bars in this article. Summarizes that anchor ability of Low-alloy coupled steels are depending transverse steel, well, steel bars and concretes has the better joint work ability.
Numerical Simulation of Mold Filling and Solidification Process of a Disc Aluminum Alloy in Pressure Die Casting
Authors: Lou Bai Yang , Liu Fang Li , Luo Kang Chun
Published: October 2011

The numerical simulations of mold filling and solidification process for the A380 aluminum alloy were done by the supposed mathematical model. The casting defects in the process of mold filling and solidification were predicted by the result of the casting simulation. The casting defects of simulation are well compared with the practice. Some measures presented were improved for the existing technological process.