bluuebunny/crossref_metadata_2025 huggingface dataset:
Development and Application of Open CNC System Based on DMC Motion Controller
Authors: Ren Zhong Wei , Song Ming , Yang Lin
Published: June 2012

The hardware system of a special machine tool was improved by the structure of "PC + motion controller" by DMC 1832 controller, meanwhile software design was implemented by VB6.0. The entire motion control system was responsible for the motion controller by using the PC as the core processing section. The whole process of lathe processing was controlled by servo motor, the overall framework of transformation was given. The system has been applied to process the superfine adjustable slender axis. In addition, the system can be secondly developed according to the actual processing needs, it has broad application prospects.
Development of STEP-NC Based Manufacturability Evaluation System
Authors: Shu Qi Lin , Li Shuai Tao
Published: June 2012

A method and prototype system have been developed to assess manufacturability of a machining job with a known machine tool. The data for describing the machining task confirms to STEP-NC data model, i.e. ISO 14649. A group of manufacturability indices have been suggested used in the system. They are called “Key Manufacturability Indicators” (KMIs). Examples of KMIs are workpiece clamping data, machine tool’s capability and cutting tool information. To assist the evaluation process, a machine tool data model is used. The prototype system is validated through an example.
Approach to Machining Setup Process Planning of NC Machine Tools Based on Graph Theory
Authors: Zhang Guo Zheng , Han Jiang , Liu You Yu
Published: June 2012

Setup datum of fixture design is an important factor of Numerical Control (NC) machining process planning. Using graph theory of FTG (Feature Tolerance relationship Graph) and DMG (Datum and Machining feature relationship Graph) technology, the feature relationship was proposed to construct a relational table of DMMT (Datum and Machining and Machine Tools) in NC machining setup process. The degree of graph as a discriminant evidence of the machining setup datum was given, so that the machining setup process planning was correctly designed. Combined with the capability of NC machine tools, the unit normal vector of feature facet between the feature datum and machining facet were multiplied to determine the fixture capability, which provide a reasonable proposal of machining setup process for multi-position rotation and multi-piece fixture design. Finally, a case study of machining setup process planning and multi-piece fixture equipment design from corporation was presented to verify the feasibility of the method that was based on the graph theory.
Research and Simulation of an Efficient Circular Interpolation Algorithm
Authors: Yan Xiao Ling , Wang Wang Long , Xue Nan
Published: June 2012

During the process of conventional DDA circular interpolation, the synthesis feed rate fluctuations often, the machining errors are large also. A new efficient arc interpolation method is proposed in this paper, which uses the principle of DDA circular interpolation, it’s function is optimized and improved, Radius is used as the basis of interpolation feed, the left normalized data and pre-loaded are used also. The simulation result of VB program show that efficient circular interpolation method not only has high efficiency,but also has high accuracy.
New Numerical Control System for Machining Based on Dual MCU
Authors: Zhang Xiang Hong
Published: June 2012

In this paper, a new numerical control system(CNC) based on ARM9 and STC12C5410 is studied. The ARM9 core microprocessor, Samsung S3C2440A microprocessor, is the main operation core. It treats the flowing tasks: response to keyboard inputting, display contents on LCD, interpretive the NC codes, output crude interpolations and so on. The secondary CPU, STC12C5410, as the assisting microprocessor is only to realize fine interpolation. The system can be connected an 8-inches display in order to display more information and it has an interface to a four-axis hand wheel. It has a communication interface and can receive CNC codes form other computer. The system can drive four step-servo motors or servo-actuators and realize turning, milling, grinding and combination machining. That is that the system is a multifunction system.
Calculation of Single Conductor Capacitance by Estimating the Electrostatic Field
Authors: Chen Yong , Yuan Jian Sheng
Published: June 2012

The capacitance between two terminals of a single conductor working with time-dependent signals is defined by the amount of energy stored in the electric field outside the conductor. A simple approach for calculating the capacitance is presented in this paper, which only needs the computation of an electrostatic field. The approach is derived based on two assumptions, (1) the distribution of potentials on the conductor surface is almost the same, created by a time-dependent current and a direct current flowing in the conductor, (2) the distribution of the potential created by a direct current in the conductor can be modeled by an electrostatic field, in which the conductor is replaced by a dielectric with high permittivity. The approach is only suitable for low-frequency situations, where the displacement current and the inductive electric field can be disregarded.
ASTVA: DDoS-Limiting Architecture for Next Generation Internet
Authors: Wei Wei , Xia Ying Jie , Dong Ya Bo
Published: June 2012

Security is an important consideration in next generation Internet, where Distributed Denial of Service (DDoS) attack is still a serious threat, especially when Internet of Things is taken into account. To defend against DDoS, capability based Traffic Validation Architecture (TVA) is an excellent candidate. However, there are some shortcomings which make it not so practical, e.g., it has large capability overhead and some DoS attacks could escape from it. To overcome these problems, we proposed the autonomic system based architecture: ASTVA, which created and verified capability using autonomic system as the basic defense unit. In ASTVA, two kinds of sub-capabilities were provided and serveral system security levels were given by mixing the two kinds of sub-capabilities; several key parameters were adjusted dynamically to enhance system flexibility; and an anti-shrew function was added to TVA to make it more robust against low-rate DoS attacks. Finally, we gave out several simulation tests and the results show that ASTVA is more robust and flexible than TVA and is more practical to real world security.
Pulmonary Nodules Detection in CT Scanned Images Based on Optimization Region Growing and MCSVMs
Authors: Zhao Jing Rong , Wang Qing Zhu , Wang Xin Gang , Zhou Jin
Published: June 2012

Lung CT images tumor automatic recognition method combined parameter optimization of regional growth with matMCSVMs (Matrix-mode within-class scatter support vector machine) was proposed to reduce the influence of lung CT image segmentation and support vector (SVM) identification in computer aided the tumor detection. Firstly, in view of the main problems existing in the traditional region growing, such that the initial seed point was too sensitive to select and the growth constraint criterion was difficult to determine, 2D PCA (2D principal component analysis) method was put forward. Secondly, a new growth criteria based on watershed range diagram was also designed for image segmentation. And then, aiming at the current problem that it was hard to compute the decision vector iterative operation in the matMCSVMs, a new method with a preprocessing conjugate gradient descent was used to optimize solution process and improve the classifier identification accuracy. The experimental results show that the methods are effective.
Chinese Connected Word Speech Recognition Based on Derivative Dynamic Time Warping
Authors: He Zhi Guo , Liu Ze Min
Published: June 2012

The algorithm of derivative dynamic time warping (DDTW) can overcome the shortcoming of dynamic time warping (DTW) and the computational complexity has not increased. In this paper, the algorithm of DDTW was applied to Chinese connected word speech recognition. For each isolated word, as an independent reference template and as basic recognition unit, there was an independent reference template to correspond; the matching between some word of the test string and a reference template was done by the DDTW, and the reference string which had the minimum cumulative distance was as output. The experimental results show that our method is obviously superior to all the methods based on DTW, and the recognition rate has reached 90%.
Urban Water Consumption Forecasting Based on Projection Pursuit
Authors: Wang Zhao Han , Xuan Chang Guo , Fu Qiang
Published: June 2012

In order to meet energy conservation and utilization optimization in urban water supply system and ensure water supply time and efficiency, we adopted the projection pursuit autoregression method to establish the projection pursuit autoregression water consumption forecasting model, combined the projection pursuit technique and time-series autoregression analysis method, and better solved the abnormal and nonlinear problems in urban water consumption. The practice proves that the forecasting precision of this model reaches the engineering requirements, and it provides a new approach for water consumption forecasting and analysis.
DOA Estimation of Surface Vessel under Correlated Noises Using Vector Hydrophone Array
Authors: He Guang Jin , Cheng Jin Fang , Xu Jie
Published: June 2012

In the traditional acoustic vector data processing, the output of a single vector hydrophone is modeled as a complex vector, which cannot hold the orthogonal structure of the hydrophone. Here, the complex-quaternion model of the vector hydrophone is proposed. The velocity elements are put in the position of the three imaginary parts, which retains the orthogonality of the velocity sensors. As the non-stationary properties of the surface vessel’s radiated signals, the received data are divided into multiple frames. The covariance matrices and their vectorizations of each frame are calculated. An orthogonal projection is employed to eliminate the background noises. Then the noise-free covariance matrix is used to estimate the DOA’s of the sources by taking use of MUSIC algorithm. The simulations verify the good performance of the proposed algorithm.
Wind-Wave Numerical Prediction Model in East China Sea
Authors: Pan Xi Shan , Li Rui Jie , Li Yang , Li Chun Hui , Zhang Wei Yi
Published: June 2012

Sea surface wind field is a basic parameter of marine dynamic process, Catastrophic Sea-state such as marine tropical storm and storm surge are all driven by marine wind, wave monitoring and prediction also need sea surface wind field. By combining the new generation of weather research and prediction model (WRF) and the third generation wave model (WAVEWATCHⅢ), establish an Atmospheric-Wave numerical prediction system. Developing sea surface wind field numerical forecast in East China Sea, it makes up the shortage of wind field data’s absence. By using the numerical prediction results, the wave model will provide accurate and reliable wave forecast products for Chinese shipping, ocean activities and military affairs.
Design and Implementation of a Remote Healthcare System Based on Wearable Body Sensor Network
Authors: Qiu Ming Lin , Tu Chun Long , Ye Xue Song
Published: June 2012

Traditional medical monitoring devices have some significant limitations for requirements of the aging society because of their complex wires. In order to solve these problems, a remote healthcare system is designed and implemented in this paper. This system consists of a BSN (Body Sensor Network), wireless gateways and a remote database. The BSN is used to expand the mobility of the monitoring devices. The PC-based home gateway is used to receive and display the data from sensors and transmit them to the remote database. In order to expand the mobility of the gateways, An Android based mobile phone is selected as a mobile gateway. At last, a simple web access is provided for the remote healthcare.
Summary on Research of Agent and Multi-Agent System
Authors: Ma You Jie , Kong Fan Ting , Zhou Xue Song
Published: June 2012

Distributed artificial intelligence is an important branch of the artificial intelligence， Agent and Multi-agent system are important aspects of distributed artificial intelligence research. This paper mainly introduce some research and exiting problems about Agent and Multi-agent system in recent years, including the Agent concept, characteristics and structure, Multi-agent system concept, structure and the coordination problem. Finally, I look forward to the development trend of Agent and Multi-agent system.
Neural Network Algorithm for Solving Large Scale Travelling Salesman Problems
Authors: Cheng Guo Zhong , Feng Wei , Cui Fang Song , Zhang Shi Lu
Published: June 2012

This study improves the neural network algorithm that was presented by J.J.Hopfield for solving TSP(travelling salesman problem) and gets an effective algorithm whose time complexity is O(n*n), so we can solve quickly TSP more than 500 cities in microcomputer. The paper considers the algorithm based on the replacement function of the V Value. The improved algorithm can greatly reduces the time and space complexities of Hopfield method. The TSP examples show that the proposed algorithm could efficiently find a satisfactory solution and has a fast convergence speed.
A Density Functional Theory Study of Gd8O12 Cluster
Authors: Gao Qing Xiang , Xu Lin , Wu Bo
Published: June 2012

The spin-polarized generalized gradient approximation to the density functional theory is used to determine the geometries, stability, electronic structures, and magnetic properties of the Gd8O12cluster. Our work reveals that the ground state configuration of the Gd8O12cluster is a hexahedral cage structure with Cisymmetry. The electronic and magnetic properties imply that the formations of the ionic bonds between the adjacent Gd and O atoms result in the high stability of the Gd8O12cluster, which is due to the charge transfers between the Gd 5d, 6s electrons to O 2p orbital. It is also confirmed by the electron densities of HOMO-LUMO states. In addition, the analysis of the magnetic properties implies the total magnetic moments are mostly dominated by the Gd 4f orbital.
Research and Application on the Visualization Algorithm of Wheel-Rail Contact
Authors: Xiang Wen Liang , Luo Xian Guang , Bi Ye Bin
Published: June 2012

A visualization algorithm was presented for the optimization of geometrical shape matching in the wheel-rail contact system. The algorithm of the subsection cubic spline interpolation was adopted to fit the wheel-rail profiles curves, and curve boundary was got by the finite difference method; furthermore, the wheel-rail contact positions were figured out by computing the roll angles of wheelset iteratively with the dichotomy. Based on MATLAB and Visual C++, the wheel-rail contact geometrical parameters were calculated and visualized, the simulation results show the algorithm has the strong robustness.
Multiclass Kernel Function Evaluation
Authors: Wang Ting Hua , Cai Cai Yun , Liao Yan
Published: June 2012

Kernel is a key component of the support vector machines (SVMs) and other kernel methods. Based on the data distributions of classes in the feature space, this paper proposed a model selection criterion to evaluate the goodness of a kernel in multiclass classification scenario. This criterion is computationally efficient and is differentiable with respect to the kernel parameters. Compared with the k-fold cross validation technique which is often regarded as a benchmark, this criterion is found to yield about the same performance with much less computational overhead.
The Research of Dynamic Encryption Algorithm
Authors: Xue Hong Wei , Shen Shi Qun , Zhu Li Na , Guo Zhi
Published: June 2012

The dynamic encryption algorithm is based on the idea of carrying on encryption to the information using dynamic algorithm; it is one kind of algorithm which can produce the stochastic algorithm. The key length of dynamic encryption algorithm is random, is suitable to carry on the encryption to the random length plaintext, and the encryption speed is quick, the intensity is high, and therefore there is the broad application prospect. This article given one kind of dynamic encryption algorithm models based on the ergodic matrix and proves the algorithm security according to the analysis on massive empirical datum.
Dynamic Encryption Algorithm Based on Ergodic Matrix
Authors: Wang Quan , Guo Zhi , Zhang Jun Ru , Zang Qi Gui
Published: June 2012

The dynamic encryption algorithm is based on the idea of carrying on encryption to the information using dynamic algorithm; it is one kind of algorithm which can produce the stochastic algorithm. The algorithm, may guarantee that the algorithm transforms dynamically using each time, like this caused that the security of the cryptogram system is relied on protection to cryptogram and also carry on the protection to the encryption algorithm. The key length of dynamic encryption algorithm is random, is suitable to carry on the encryption to the random length plaintext, and the encryption speed is quick, the intensity is high, and therefore there is the broad application prospect. This article given one kind of dynamic encryption algorithm models based on the ergodic matrix as well as the concrete realization method, and proves the algorithm security according to the analysis on massive empirical datum.
Application of Virtual Instrument on Condition Monitoring and Fault Diagnosis System of the Rotating Machinery
Authors: Du Yong Ying , Wang Yu Ning , Yin Ming Ang
Published: June 2012

In the paper it can be easier to realize the acquisition of the rotating machinery vibration signal and condition monitoring through the configuration the platform of virtual instrumentation. For the data acquisition it is enough to be plus with two acceleration sensors and a counter. The system is divided into parameter setting module, data acquisition, storage and display module, amplitude domain analysis module, time-domain analysis module, frequency domain analysis module, time-frequency domain analysis module and fault diagnosis module. The signal acquisition is got by using the PCI-6024E data acquisition card. And it is can be saved as binary data stream files and waveform data file according to the requirements of the sequence data processing. Signal analysis is conducted by using LabVIEW software and draw out the vibration spectrum diagram in order to achieve fault diagnosis of rotating machinery.
The Review of Grid-Connected Photovoltaic Power System and its Nonlinear Behavior
Authors: Ma You Jie , Cai Ying Xue , Zhou Xue Song
Published: June 2012

This article introduces the classification and composition of Grid-connected Photovoltaic Power System, and the research status of its nonlinear behavior. In the Photovoltaic Power System, photovoltaic array, DC/DC converter, DC/AC inverter and nonlinear load will appear lots of nonlinear dynamic behavior such as bifurcation and chaos phenomena. The paper elaborates the DC/DC converter and DC/AC inverter in the Photovoltaic Power System, and analyses their nonlinear phenomena.
Measurement and Control System for Traction Motor Based on OPC Technology
Authors: Yang Ye Song , Ren Guang Sheng , Yin Xiao Qing
Published: June 2012

The paper analyzes the working principle and the advantages and disadvantages of synchronous access and asynchronous access in OPC standard. Take the traction motor performance test and control system as example. It used Visual Basic development OPC client and used PC Access as an OPC Server. The performance test bed for traction motor realize the measurement and control system efficient, stable and reliable operation. According to the characteristics of different parameters, the system chooses the methods of Subscription and Synchronous Write which used the advantages of synchronous access and asynchronous access.
Design of Granary Temperature Monitoring System Based on Virtual Instrument Technology
Authors: Liu Jian
Published: June 2012

A hardware and software designing program of temperature monitoring system is proposed in this paper, which takes DS18B20 and single chip microcomputer as the core components. The system measures the real-time temperature, and supports the LCD display. The measured data is transferred to the host computer through RS232 bus. LabVIEW based PC software has data display and storage functions etc. It is verified that the system measurement error is within ±0.5°C. In the practice, the system can meet the needs of granary temperature measurement.
The Fuzzy-PID Algorithm Apply to the Constant Gas Flow Control of the Dust Sampler
Authors: Li Ren Jiang , Wang Tie , Sun Cheng Xun
Published: June 2012

The Sampling flow will be decreased because the permeability weakness of filterable membrane after the dust sampler working for a period of time. It seriously affects the accuracy of measurement, so we should keep the dust sampler working under the constant gas flow. The stable, rapidness and accuracy constant sampling can be achieved based on the application of fuzzy-PID algorithm and the adoption of PWM technique. It has carried on design to the dust sampler control system from selecting the hardware and designing the software to data processing and errors analysis, and discussing the preferable performance of the dust sample control system.
Using Spectrum Correction to Diagnose Mechanical Fault
Authors: Qin Hao Hua
Published: June 2012

To diagnose the mechanical fault diagnosis from the rotation records, FFT and all-phase FFT (apFFT) are introduced to estimate the individual harmonics’ frequency, amplitude and phase of fault signal. Through introducing with synthesized FFT/apFFT correcting method of phase difference, the frequency and amplitude estimation can be obtained by utilizing these two spectral analysis results at the position of peak spectral line. Moreover, for apFFT possess the merit of phase invariance, the phase value at main spectral position can be directly taken as the original phase without any correcting operations, thus, waveform reconstruction is realized. Simulation experiment proves that fault information can be intuitively reflected by the quality of reconstructed waveform, and the corresponding type of mechanical fault based on parameters estimation can be identified.
Vibration Influence Analysis of the Reliability Test for an Undercarriagedoor Lock System
Authors: Zhang Tuo , Cui Wei Min , Guo Wei , Yu Tian Xiang
Published: June 2012

The processing of experimental data of an undercarriagedoor lock system in the condition of vibration is an important part of the reliability test for the undercarriagedoor lock system , which is of significance to guarantee the aircraft safety and reliability of the lock system. The analysis of aerodynamic loads data and strain data in the different case of non-vibration and vibration are conducted with curve fitting, then the reliability evaluation is given and the results with and without vibration are compared and analyzed in this paper. From the work above, the experience which is worth to be referred to is summarized and lays the foundation of evaluating the reliability of the undercarriagedoor lock system in vibration case.
Evaluation Model of Product Manufacturability for Rapid Response Design
Authors: Shu Tian Jia , Zhong Xiao Qiang
Published: June 2012

Rapid Response Design (RRD) attempts to put the product design into effect in the minimum time to satisfy the customer requirements. Product manufacturability has a very important effect on the performance of product design, especially in the progress of rapid response design. The concept of product manufacturability is usually considered as a multi-objective problem. An effective product manufacturability evaluation procedure necessitates the consideration of qualitative criteria, e.g., product quality, as well as quantitative criteria such as material cost in the decision process. This paper purposed an evaluation model of product manufacturability for RRD based on the data envelopment analysis (DEA) methodology and analytic hierarchy process (AHP). The proposed evaluation model is both effective and efficient.
Research of Engineering Change Analysis
Authors: Fang Yong Ze , Guo Xiao Xi , Chen Jian Hai
Published: June 2012

An engineering change is costly and time consuming. Therefore, the research of effective methods and software is highly significant to engineering change analysis. This paper has conducted research on the engineering change analysis method and decision support environment. The characteristics of an engineering change were demonstrated; the data model was set up for supporting engineering change analysis; the method for analyzing engineering change propagation was proposed. The multi-user dynamic analysis of an engineering change and storage of the engineering change scheme with reusability were achieved in this paper. According to the results, the research shows more flexible and efficient to analyze engineering changes and further assure the completeness of changed data.
Survey of Development and Technology of Smart Grid
Authors: Zhou Xue Song , Shang Bin , Ma You Jie
Published: June 2012

In this paper the connotation of smart grid is expounded, the present research status of smart grid at home and abroad are summarized, their differences from the traditional power grid were described, , and the key technologies and capabilities of smart grid were expatiated on. Finally, the opportunities and challenges that our country is facing in the development of smart grid were elucidated.
Application of Electronic Display Systems for Visual Management in SMEs
Authors: Chang Xue Fei
Published: June 2012

Electronic display system is a computer-controlled display tool, being low-cost and easy to control. Therefore, the electronic display system for visual management provides a simple and effective way for small and medium enterprises. By applying electronic display system, SMEs can carry out visual management of tasks, strengthen enforcement; it can also be used in production system to deal documentary, even to carry out performance management to form a fair business environment.
Optimization Retrieval for Manufacturing Resources Based on Interval Number
Authors: Zhao Zhong Min , Peng An Hua
Published: June 2012

Information model for MR and MT was built against the uncertainty in the network environment. This paper proposed the regulations of conversion of uncertain capability parameters into interval numbers, and an innovative solution to retrieval to rapidly single out the best MR. Finally, with a practical example, the solution was further illustrated simple but effective.
Application of HAZOP Method in the Design of Shallow Water Catheter Frame Platform
Authors: Wang Yu , Zhao Qiang , Huo Bao Yu , Cai Zhi Wei
Published: June 2012

HAZOP (Hazard and Operability Study) is a system analysis method used to identify design defects and dangerousness and operability of process, , which has been widely used in the oil industry at home and abroad. In this paper the basic principle and analysis process of HAZOP analysis method were detailedly introduced. Taken the HAZOP practical application of offshore jacket platform in Jidong Oilfield for example, the defects which can lead the security and operation problems during the process of equipments design and operation were systematically identified. Combined with analyses of the achievements of this practical application, the advantages of the implementation of HAZOP method are concluded such as effectively reducing engineering design defects and safety problem of operation process; improving safe reliability of process system.
Two-Stage Supply Chain Inventory Coordination Strategy with Supply-Hub Operation Mode
Authors: Li Shuangy Yan , Zhang De Zhi , Jin Fang Ping
Published: June 2012

It is difficult to control and coordinate inventory of assembly manufacturing supply chain because there are multi-suppliers in control system. In order to integrate different suppliers and send parts packages to production line directly, Supply-Hub is used in practice. Queuing theory and basic inventory strategy are applied to model inventory control of assembly manufacturing supply chain with Supply-Hub mode. And optimization solution for decentralized decision and centralized decision were derived separately. Then coordination inventory strategy is obtained by comparing decentralized decision and centralized decision. Backorder and holding cost subsidy contracts are used for coordination that incites suppliers to set basic inventories in favor of whole supply chain operation cost reduction. And numerical examples of three suppliers and one manufacturer are given to illustrate the effectiveness of the coordination strategy.
Approach for Flow Shop Scheduling Based on Petri Net
Authors: Yan Bing Yi , Li Pei Jun
Published: June 2012

A flow shop scheduling problem based on the controlled Petri net and GASA is presented with multi-workstation operation. Firstly, the math model of this flow shop scheduling problem is constructed. Secondly, Petri net controller is designed based on Parikh vector, and the Petri net model is constructed. And then, GASA is applied based on the math model and the controlled Petri net model. Finally, one example is applied to test the effectiveness of the method.
A Cutter Production Management System Based on the Hybrid Architecture of C/S and B/S
Authors: Wu Zhao Yun , Wu Xin Ping , Li Li , Liu Nan Bo
Published: June 2012

In view of the problems of information management in the cutter manufacturers, the information system oriented to cutter production management was proposed. The system architectures of C/S and B/S were compared and analyzed, and then the design pattern based on the hybrid architecture of C/S and B/S was proposed. The function modules and structure of system were presented. The design methods of coding and data tables in the system database were analyzed. Based on these, the cutter production management system based on hybrid architecture was developed. The development environment and implementation methods of the system were proposed. And the key technologies of the system were put forward, including the order management, the cutter CAD and the security design. The system can effectively improve the informatization level of the cutter manufacturers.
VaR-Based Job Shop Scheduling Model and Algorithm
Authors: Yu Ying , Wang Chen Wei , Zhu Ji
Published: June 2012

As uncertain processing time of some jobs may bring unpredicted deterioration of job shop scheduling performance, a measure of VaR is introduced into the job shop scheduling model, and a genetic algorithm combined with Monte Carlo simulation method is presented for solution. Lastly the numerical examples illustrate the efficiency of both the model and the algorithm.
Assembly Process Modeling Based on Hierarchical Tree
Authors: Rao Zhi Hua , Gong Jing Zhong , Li Guo Xi , Wu Bao Zhong
Published: June 2012

Assembly process has a complicated influence on dynamic characteristics and the product performance. However, the information model of the non-geometric process parameters isn’t considered by the existing assembly modeling methods. Based on the further developing of the traditional hierarchical structure, the assembly process layer hierarchical structure was obtained. By acquiring the assembly feature constraints hierarchy tree in Pro/E, and re-modeling the hierarchy tree information, a model of the assembly process hierarchy tree was proposed, and its information model was established. The software instance showed the application of the assembly modeling method. Computer aided alignment showed the proposed approach superior in the assembly process planning, managing and tracking. By the key assembly parameters information modeling, data for subsequent product alignment analysis was supported.
Study of Assessment Model of Packaging via AHP Method
Authors: Gong Gui Fen , Yin Ke , Lan Ming
Published: June 2012

An assessment model of packaging solutions is built based on AHP method in response to diversification of packaging solutions. The assessment is intuitive. The model can be not only used in comprehensive evaluation, but also used in the evaluation of the secondary indicators. Using the model to assess packing solutions, you can make the assessment process operate easier, and the results more intuitive. The model can be widely used in assessment of packaging solution.
M&A: A Management Method of Supply Chain
Authors: Huang Wei Ping
Published: June 2012

This paper studies the impacts of M&A on supply chain management, such as transaction cost, the balance of stakeholder-interests, and the economies of scale in overall costs of supply chain. The paper indicates that M&A is a kind of supply chain management means, and enterprises should pay more attention to the changes of supply chain during M&A.
Research on Layering Model in the Service-Oriented Network Management Architecture
Authors: Yan Hui , Yu Pan
Published: June 2012

With the development of the computer and communication technology,the traditional network management systems that look upon the network equipments as the management objects could not meet the needs of the service management.To set up a new network management system structure could be solve the network of effective management of business.Referencing the traditional models of network management,through the application layer to set up a new service-oriented distributed network management architecture,which combings network services and management services，is proposed to achieve data collection using active network technology.
Technology of Grid-Connected Wind Power Generation
Authors: Li Jie , Zhang Yu Jie
Published: June 2012

Based on the synthesis of several common grid-connected methods of wind generator, the paper compares their advantages and disadvantages when these methods are used in theapplication of wind power generation respectively, then predicts their further development trend of wind power grid-connected technologies. Besides, brushless doubly-fed generators are widely applied inVSCF(Variable Speed Constant Frequency) wind power generation system
The Design and Implementation of Web Service Based on Axis2
Authors: Zhang Zhi Ming , Yu Ming , Xiong Xiao Yong
Published: June 2012

With the rapid development of the Internet, a large number of data information appears on the Internet, however, these data information are come from incompatible applications and frameworks that cannot interoperate or exchange data, and it is difficult to effective share and use these data information. Web Service is a new model for the integration and sharing of data information, many scholars have been done much research work on how to achieve data sharing by using the web service technology. This paper analyzes the accessing process of web service based on the Axis2, and takes the library web service as an example to describe the whole process of web services creating, publishing, and accessing. The example of library web service shows that it has speediness, practicability and effectiveness to design and implement the web service by Apache Axis2.
An Overview of STL Model Offset
Authors: Zhu Hu , Jing Xue Yong , Zhang Peng
Published: June 2012

The offset models of STL (Stereo Lithography) are useful in many applications such as interference-free tool path generation in numerical control machining, hollow or shelled model generation in rapid prototyping. So the methods for STL model offset are very important. In the paper, an overview of the STL models offset methods is presented in brief.
Calling Method of Process Sheet in Interactive Round-Hole Broach CAPP System
Authors: Wang Ya , Wang Min
Published: June 2012

On the basis of analyzing the present condition of manufacturing process planning in various factories, we formulate the calling strategy of the interactive round-hole broach CAPP system based on Solidworks to realize the system function, general structure and operation mode of the system. The method can reduce the duplication of labor during the process design while improve the design efficiency and the accuracy of process data.
An Online Prediction Model for BFG Output in Steel Industry
Authors: Zhang Xiaoping , Zhao Jun
Published: June 2012

The output prediction of blast furnace gas (BFG), influenced by many complex production factors, is a very important and difficult problem concerning the byproduct gas balance in steel industry. A new online least squares support vector machine (LSSVM) prediction model is proposed in this paper, in which the training data is filtered by an improved empirical mode decomposition threshold filtering (IEMDTF). The model is solved and optimized by an online learning algorithm and an online bayesian parameters optimization, respectively. The experimental results using practical BFG output data from BaoSteel Co. Ltd., China show the proposed model is effective and enable to offer reasonable gas balance scheduling for operators.
Discussion on Equipment Acquisition System Modeling
Authors: Wu Yan Mei , Guo Kai
Published: June 2012

In order to direct the equipment acquisition information construction, a model framework was proposed based on the reference architecture——Open System Architecture for Computer Integrated Manufacturing (CIM—OSA), according to the business characteristics of equipment acquisition. The framework could be used to describe five different views of equipment acquisition system: function, resources, organization, information and workflow. And then the modeling process was depicted. The studies proposed in this paper will provide a foundation for the future investigation in equipment acquisition information.
Application of Straightness Error Based on Virtual Instrument in Experiment Teaching
Authors: Wan Wen
Published: June 2012

Because of the traditional straightness error evaluation drawbacks in the experiments, straightness error evaluation platform based on virtual instrument is established by using LabVIEW8.5.It can complete the measured signal acquisition,real-time analysis processing and the contour curve display, and the accuracy of the straightness error value is presented by using different methods such as the two endpoints link line algorithm and minimum zone algorithm. An example of experiments and test data are provided. The system is easy to program and fast to execute, which can meet the needs of the teaching experiment.
A Gas Detection System Based on the Micro Light Splitting Principle
Authors: Wang Hai Rong , Zhang Wei , Cen Di , Tian Min
Published: June 2012

This paper presents a novel system for detecting concentration of the CH4 and CO gases, which exist widely in the coal industry. The system applies micro blazed grating to split the collimated light and may get the infrared absorption light with certain wavelength and bandwidth for the gases detection. The schematic diagram, calculation, signal processing, and setup were described in details. Experimental results indicate that the detection system has the ability to detect methane and carbon monoxide with maximum error of 0.169% and 58.3ppm, stability of 0.76% and 0.22%, respectively.
Space Arc Trajectory Planning Based on PCI Motion Control System
Authors: Zhao Ji Zeng , Xu Min , Fu Wei
Published: June 2012

This paper presents a method using the PCI motion controller which provides function of space linear interpolation to implement space arc trajectory planning on three dimensional motion platform. While make plane constraint to space spherical, we get space arc trajectory in Cartesian Coordinate System. Using the constraint arc by appropriate of precision discrete, function of space linear interpolation and the movement buffer nested in controller card to implement space arc movement. Writing control interface by using VC++ and actually validated on XYZ-three dimensional motion platform. The result confirmed feasibility and accuracy of this method.
The Residual Life of Shipboard Cable Forecasting Based on PSO and GM(1, 1)
Authors: Wei Yi , Liu Yan Cheng , Wang Chuan , Chen Gang
Published: June 2012

In this paper, the Gray Theory is used to predict the residual life of shipboard cable. However, under the influence of multi-factors, the grayscale of the model will be enlarged, which will influence the accuracy of the prediction. Therefore, the optimized parameter of the GM (1, 1) model based on PSO, is introduced to improve the precision of the predication. The method is proved effectively by the experimental data and the Arrhenius Equation.
The Segmentation Method Based on Fusion Algorithm of Transition Region Extraction for Coronary Angiograms
Authors: Kang Wen Wei , Kang Xiao Tao , Liu Bin
Published: June 2012

Aiming at the complex background of coronary angiograms, weak contrast between the coronary arteries and the background, a new segmentation method based on transition region extraction is proposed. Firstly, the coronary arteries are extracted by using the local complexity method based on Top-hat. Then the coronary arteries are extracted again by using the local complexity method based on Gaussian filter. Finally, the segmentation image is obtained by fusing two extracted coronary arteries images. The experiments indicate that the proposed method has better performance on the small vessels extraction and background elimination. In addition, the method is valuable for diagnosis and the quantitative analysis of vessels.
Research of Ballistic Missile early Warning System
Authors: Zhang Ming Hui , Zhang Yao Yu
Published: June 2012

To develop a lift early warning infrared device, as a part of land or boat (ship) early warning system, the system has the ability to target pre-discovery and instructions invasion. Methods: In support of distant air situation, alerts the enemy aircraft, missiles and other long-range goals, obtain the target type and preliminary judgment of grade, deliver the alarm information to the command system. The infrared alarm device detects the target's own infrared radiation passively, alarms the incoming targets at low altitude and low altitude remote, when radar and other equipment is out of work. Results: The accuracy of entire system reached 20" according the analysis. Conclusions: The device has a full range of complex background, with high sensitivity, high resolution, anti-jamming, fast response time and other characteristics
Precision Comparison of 3D Measurement System Based on Stereo Vision
Authors: Zhang Ke , Gao Zhao
Published: June 2012

The 3D measurement based on stereo vision, as a new measurement technology, has been widely used in reverse engineering, robot vision and quality control, etc. In this paper, the basic principle and method of calibrating 3D measurement system based on stereo vision respectively using genetic algorithm and neural network was introduced. Then the measurement system was calibrated and the precision of 3D measurement system was compared. The experimental results indicate that the method based on BP neural network can improve the precision of measurement better.
An Improved Clustering Algorithm Based on Coverage Area for Wireless Sensor Networks
Authors: Chen Li Jun
Published: June 2012

Clustering is an effective topology control approach in wireless sensor networks, which can increase network scalability and lifetime. A clustering algorithm based on the total number of neighbor nodes is proposed to maximize the lifetime of the network. The larger amount of neighbor nodes, the more chance a node has to be selected as a cluster head. Therefore, it can ensure the minimum cluster heads in the whole network. By closing the communication parts of cluster head to avoid selecting as cluster head in next epoch, the energy of the whole system is consumed symmetrically. The simulations demonstrate the effectiveness of the algorithm.
Crosstalk between Nb Superconducting Coplanar Waveguide Resonators
Authors: Zhao Na , Liu Jian She , Zhao Hu , Li Hao , Li Tie Fu , Chen Wei
Published: June 2012

Nb based superconducting coplanar waveguide resonators on oxidized silicon wafer were fabricated and characterized at different temperatures. Crosstalk between two single resonators fabricated on the same chip was observed. When microwave signal is sent to the input of either resonator, output from both resonators show almost the same resonant frequency and similar quality factors.
Pulsating Flow Induced Vibration in a Rotor-Seal System
Authors: Zhang Nan
Published: June 2012

The pulsating flow is an important factor affecting the performance of the rotor-seal system. From the point of view of pulsating flow induced vibration, the nonlinear models of the rotor-seal system with the pulsating fluid flow are established. Based on the numerical simulations by Matlab/Simulink, the characteristics of pulsating flow induced vibration with the flow velocity in a form of sine wave or/and a constant have been quantitatively analyzed. The investigation also demonstrates that the proposed models, from the point of view of pulsating flow induced vibration, can be effectively applied to the analysis of the rotor-seal system.
Dynamic Performance Experiment and Fuzzy PID Control Method Study on MRF Engine Mount
Authors: Hou Suo Jun , Shi Wen Ku , Yang Mao , Li Hai Sheng
Published: June 2012

A MRF fluid engine mount with controlled annular access, inertia track and decoupler is designed. Through the experiment it can be seen that the low frequency performance of the mount is greatly improved. Then the dynamic low frequency performance of the mount using the fuzzy PID control method of two degrees-of-freedom system in different engine speed is simulated and the results show that the fuzzy PID control method is effective to reduce the body acceleration.
Global Calibration Method for a Multi-Sensor Measurement System Based on Structured Light Stereo Vision
Authors: Lin Jun Yi , Jiang Kai Yong , Huang Chang Biao , Liu Bin
Published: June 2012

The global calibration of multi-sensor measurement system is difficult to accomplish, usually, it needs external high-precision measurement equipment. A novel global calibration method based on common planar template is proposed. Stereo vision combined with laser linear-structured light is adopted to constitute a 3D vision sensor system (3DVSS). Stereo calibration of the 3DVSS can be finished by the planar template calibration method. For the global calibration of multiple vision sensors, it only needs a common planar template which is one of the planar templates can be seen synchronously by every camera in 3DVSS. The homography matrix between the coordinate systems of the 3DVSS and the common planer template can be calculated. The global coordinate is established in the common planar template, so the local coordinate system (LCS) of each 3DVSS can be transformed to the global coordinate system (GCS) through the common planar template. Two experiments have been used to test the proposed method, and the experimental results show that the proposed method is flexible and effective.
A Study on the Recognition of Low-Resolution Motion Visual Image
Authors: Zhang Jian Chuan , Song Huai Bo , Li Xue Yong , Lu Chang Hou
Published: June 2012

Because of shortcomings of images of motion objects in deep space，including non-uniform distribution of background pixels，low SNR, general 1ow picture quality and small size，a novel image segmentation algorithm based on the combination of image gradient and its variance is adopted. An algorithm to compute the correlation coefficient based on the small region template matching is presented. The algorithm overcomes the disadvantages of correlation disturbed frequently by noise, and size difference, besides it also reduces the computational complexity and improves the speed of the system．Experiments show that the algorithm has great accuracy，high speed，and good stability，and can meet the requirements of a real-time system.