bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Strategy of Multi Sensor Information Fusion in Coal Mine Disaster Scene
Authors: Wang Yu Qing , Qin Yu Xin , Li Zhi Guo , Deng Le
Published: November 2012

Different types of disasters occur frequently in coal mines. This paper analyzed the characteristics of different disasters, chosen the corresponding sensors to collect the information of disaster scene, and discussed the methods of multi sensor information fusion. Lastly, the multi-sensor information fusion strategies for fire, gas outburst, flood, and roof collapse were proposed in this research.
Benefit Analysis about Parts Supplier and Bus Factory as Well as Users Based on Game Theory
Authors: Han Liang , Si Xiang Mei
Published: November 2012

This thesis analyzes the benefit produced by the cooperation or non-cooperation of parts supplier and bus factory as well as users by use of the perfect-information static game model of the game theory in connection with the current situation of China's bus market supply chain. Conclusions are drawn from the analysis that good after-sales service not only brings benefits to users but also can efficiently promote the voluntary cooperation between a parts supplier and a bus factory, so that the individual benefit and the overall benefit are both increased, and a win-win situation is finally achieved.
Performance and Structure of an EMP Simulator
Authors: Lu Jing Xia , Dai Fang , Chen Wei Feng
Published: November 2012

The electromagnetic pulse simulator designed in this paper consists of an adjustable direct current high voltage source, a capacitor for energy-storage, an air spark gap switch, a resistive divider for measurement and a GHz transversal electromagnetic wave (GTEM) cell. The analysis model is constructed based on the theory of transmission line. Influencing factors, such as self-load and impedance mismatch of the transmission line (as well as the cell), were analyzed using Pspice. The self-load has the effect of parallel connection with the load of GTEM cell. It may increase the rise-time, decrease the fall time and reduce the voltage peak. The sudden change of the transmission line impedance will make the waveform of pulse contain reflected oscillation. Four types of resistance divider link were also simulated using Pspice. Improper connection of the resistance divider will cause the waveform of pulse oscillation and lengthen the rise-time, which can be reduced by shorting the high voltage lead, using system structure with gradually changing resistance or connecting a damping resistance at the end.
Collaborative Optimization of Replacement and Spare Ordering of a Deteriorating System with Two Failure Types
Authors: Cheng Guo Qing , Li Ling
Published: November 2012

This paper proposes a model to find optimal ordering and replacement policies for a deteriorating system. Assume that the life time of system has a normal distribution, and it has two failures types, typeⅠfailure is repairable, whereas typeⅡfailure is catastrophic which leads to replacement. A replacement policy N is adopted by which the system will be replaced by an identical new one if available at the time following the Nth typeⅠfailure or the 1st typeⅡfailure whichever occurs first. Furthermore, it considers an ordering policy M in which a spare unit is ordered at the time of the Mth typeⅠfailure or 1st typeⅡfailure, whichever occurs first. The objective is to derive the long-run average cost rate and then find the optimal policy (N,M) such that the average cost rate is minimized. Finally, a numerical example is provided to illustrate the proposed model.
A Uncorrelated Multi-Sources Dynamic Random Load Identification Algorithm Based on Least-Squares in Frequency
Authors: Ma Lin Lin , Wen Jie , Wang Cheng , Dong Long Lei
Published: November 2012

Because frequency dynamic load identification method will confront with the illness problem of finding the verse of coefficient matrix, a new multi-source load identification algorithm based on least-squares in frequency is proposed. Based on the assumptions of linear time-invariant system and uncorrelated of each load, this new algorithm combines transfer functions, least-squares of generalized matrix inverse in frequency. According to response signals of multi-spots, it can identify multi-sources dynamic random loads in frequency domain at the same time. Formula derivation, application scope and steps of this method were summarized then. In order to valid its effectiveness and reasonableness, the author carried out vibration and acoustic simulation in cylindrical shell at last. Load identification results of simulations showed that this new method could basically meet the dynamic random load precision requirement of ±3db.
Research of Electronic Nose Pattern Recognition Algorithm Based on SVM
Authors: Liang Wei , Zhang Li Na , Li Xiao Wei , Zuo Yan Di
Published: November 2012

In order to improve the recognition rate of the electronic nose system for small samples, an electronic nose pattern recognition algorithm based on support vector machine (SVM) is proposed in this paper. Identification experiments for three kinds of wine with similar odor were carried out. The sensor arrays are optimized by means of principal component analysis (PCA) method first. Then, make comparing experiment using different algorithms for different number of training samples of wine. The related results show that PCA-SVM based pattern recognition algorithms has high recognition accuracy, stronger classification capability, and has potential advantages in small sample classification and recognition experiments.
Study on Quasi-Synchronous DFT Algorithm
Authors: Pan Feng , Song Qiang , Chen Rui Min , Xiao Yong , Sun Wei Ming , Zhao Wei , Ma Zhe Fei
Published: November 2012

The principle of quasi-synchronous discrete fourier transform (DFT) algorithm was introduced and the simulation on the algorithm was carried out. The quasi-synchronous DFT algorithm is independent of the first sample point and it is able to start sampling at any moment. The maximum relative amplitude error and phase error of the algorithm are 0.05 % and 5.4° when the frequency of the signal is between 49.5 Hz and 50.5 Hz. The accuracy of quasi-synchronous DFT algorithm can be improved by scores of times than that of DFT algorithm.
Rational Function Functional Networks Based on Function Approximation
Authors: Wang Dong Dong , Chen You Jun , Pang Hai Jie
Published: November 2012

In order to solve function approximation, a mathematic model of Rational Function Functional Networks (RFFN) based on approximation was proposed and the learning algorithm for function approximation was presented. This algorithm used the lease square method thought and constructed auxiliary function by Lagrange multiplier method, and the parameters of the rational function functional networks were determined by solving a system of linear equations. Results illustrate the effectiveness of the rational function functional networks in solving approximation problems of the function with a pole.
Retarded Integral Inequality and its Application in Retarded Differential Equation
Authors: Wang Wu Sheng , Zhou Xiao Liang , Lin Yuan Hua
Published: November 2012

Differential equations are important tools in studying of natural science, engineering technology, and the laws of social economic development. It is necessary to seek some new inequalities in order to study of boundedness, uniqueness, stability and boundary value problem of a differential equation. Motivated by Abdeldaim integral inequalities, in this paper, we establish a class of generalized retarded nonlinear Gronwall-Bellman-Type integral inequalities and give upper bound estimation of the unknown function by analysis skills. Finally we give an example to illustrate the effectiveness of our results in estimation of solutions of some differential equations with the initial conditions.
Study on Data Fusion Algorithm in High Dynamic GPS/INS Integrated Navigation System
Authors: Ye You Yi , Zhao Xiang
Published: November 2012

This document explains how to aim at low-precision in navigation and position of Inertial Navigation System and dependence of Global Positioning System. A combination of these two systems provides good compensations for each other. GPS/INS integrated navigation system in high dynamic environment is studied, an integrated algorithm based on the pseudo-range and pseudo-range rate is introduced. By analyzing the error model of INS and GPS navigation systems, the state equation and the observation equation are founded. Finally, data fusion algorithm is simulated using kalman filtering algorithm, simulation results show that the data fusion algorithm can improve reliability and maturity of integrated navigation system.
Design and Implementation of Cloud Storage Security System
Authors: Zhou Mei Rong , Jiang Zheng Tao
Published: November 2012

The user identity information management and authentication, safety of the stored data in the cloud storage environment are the challenges of cloud security, all these have drawn attention of researchers in recent years. We made a security model of cloud storage: the model adopts many encryption methods to protect the user data and user identity information stored in the cloud storage management server, only authorized users can use cloud service. At last, we gave security analysis of the model, the result shows: the architecture is able to hide the characteristics of the data stored in the cloud server, certify and protect user identity information effectively.
The Technology Research Based on Least Square Method for Extracting Quadric Surface
Authors: Chen Y. W. , Zhang H. X. , Zhang W. Y.
Published: November 2012

In this paper, the discrete point cloud data is directly used to extract quadric surface, with the single type of the point cloud data, the surface is firstly recognized. And then, according to different types of quadric surface, using the geometric parameter equation, the technology of extracting quadric surface can be achieved based on least square method. The results of the study show that: For normal data or less noisy data, the accuracy of calculation of linear least square method is the highest. For the nonlinear square method, on the other hand, the calculation precision is the lowest. However, the computational efficiency of the nonlinear least square method is higher than the linear least square method. The least square laws are more sensitive to noise data. With the increasing of the increased noise data, the extraction accuracy of the results will be affected by certain influence, but its computation efficiency is higher. Research results to practical engineering application of least square method to extract the quadratic surface have certain guiding significance.
Research on Communication Mechanism of Enterprise Network Resource Coordination
Authors: Shi Yong Gui , Yan Jian Fen , Li Hai Xia
Published: November 2012

The coordination mechanism of enterprise network resource refers to the rules which the enterprise network members are able to comply with and unity action in order to achieve the expected goal. The rules mainly include: opportunity discovery mechanism, communication mechanism, strategy consultation mechanism and the learning mechanism of enterprise network, as well as the evaluation of coordination effect. Communication is the basic premise of coordination. According to the types of enterprise network, there are mainly three kinds of basic types in enterprise network communication, which is communication based on the core enterprise, communication without core enterprise and Communication of chain. Communication in the enterprise network resource coordination process refers to the transmission and exchange of activities knowledge and information among the behavior subjects in order to realize the goal of sharing resource. Influence factors of communication in enterprise network resource coordination include the number of communication subjects, the type of communication ways, communication language, culture and roles.
Anomaly Intrusion Detection Based on Concept Lattice
Authors: Wang Li Fang
Published: November 2012

In order to identify potential and effective intrusion detection rules, and improve the detection rate of intrusion detection system, this paper combines the concept lattice with intrusion detection technology and proposes a anomaly intrusion detection system based on concept lattice theory. The system first pre-treats those collected data, regulates data and builds concept lattice using the minimal set of attributes which are obtained by attribute reduction. And it analyzes the implication relations between concepts and obtains non-redundant classification rules. The anomaly intrusion detection model based compared with other tests can easily get training data. Experimental results show the model reduces the computation amount to achieve classification, improves the intrusion detection rate and effectively controls the false detection rate.
Topic Crawling Strategy Based on Wikipedia and Analysis of Pages' Similarity
Authors: Zhao Xiao Nan , Liu Li Bo , Wang Deng Wei , Zheng Jiao
Published: November 2012

Considering the weaknesses existing in the present topic crawling strategies, this paper puts forward a new method which is based on Wikipedia and the analysis of page similarity. Firstly, the topic is described via Wikipedia. Then, handle the downloaded web. Finally, calculate the priorities of the links through text relativity and analysis of the web links. The result indicates that this new method is better than the traditional in terms of searching results and topic relativity and is worth popularizing.
An Algorithm Subdividing the Intersection Triangle for Realizing Boolean Operations of STL Models
Authors: Guo Kai Bo , Wang Ming Di , Sun Cheng Feng , Shi Shi Hong
Published: November 2012

The efficient implementation of Boolean operatio between STL models is a bottleneck problem to develop excellent RP data processing software, and the subdivision of the intersection is an important step of realization the Boolean operations. An algorithm is proposed in this paper. Based on the closed character of the STL model, the position relationship between the intersection lines and the triangle are classified, and the subdivision rules is summarized. The two data linked list of the intersection points and vertex points are created, a searching process to obtain the subdivision polygon is described.
Flood Disaster Evaluation Based on Improved BP Neural Network Model
Authors: Yang Xiao Ling , Zhou Jian Zhong , Ding Jie Hua , Zhang Yong Chuan
Published: November 2012

Floods have become increasingly alarming worldwide. In this paper, we firstly introduce the Improved BP Neural Network model (IBPNNM) based on entropy value theory in detail. Then we adopt Levenberg-Marquardt (LM) algorithm to achieve a higher speed and a lower error rate to overcome the shortcomings of the traditional BP algorithm as being slow to converge and easy to reach extreme minimum value. To illustrate the procedure of the proposed method, we apply IBPNNM to describe the flood disaster risk quantitatively in China by using statistical data respectively, including number of deaths, number of victims, collapse of housing, affected crop area, direct economic loss of 22 Areas in China in 1998. The results of IBPNNM are compared with the results of the matter-element analysis method to confirm that the proposed model is reasonable, effective and feasible.
A Rough Set Based Approach to Knowledge Acquisition for Product Service System Configuration
Authors: Long Hui Jun , Wang Li Ya
Published: November 2012

Product service system is a bundle of products and services. For higher customer satisfaction, product service systems have to be configurated to lead to desired customer perceptions. And it is necessary for configuration to discover the mapping relationship which is normally characterized by imprecision, uncertainty and non-linearity, from product service systems to customer perceptions. This paper proposes an approach based on dominance relation rough set to extract configuration knowledge considering customer perceptions. Loadometer product service system is used as a case to validate the proposed approach, and the results gain from the case show that the approach is effective.
An Efficient Iterative Method with Order of Convergence Seven for Nonlinear Equations
Authors: Hu Yun Hong , Liang Fang , Guo Li Fang , Hu Zhong Yong
Published: November 2012

In this paper, we present a modified seventh-order convergent Newton-type method for solving nonlinear equations. It is free from second derivatives, and requires three evaluations of the functions and two evaluations of derivatives at each step. Therefore the efficiency index of the presented method is 1.47577 which is better than that of classical Newton’s method 1.41421. Some numerical results demonstrate the efficiency and performance of the presented method.
A New Chaotic Image Scrambling Scheme Based on Spatial Bit-Level Map
Authors: Liu Rui
Published: November 2012

Image scrambling is an important technique in digital image encryption and digital image watermarking. This paper proposes a new image scrambling algorithm based on chaotic sequence and spatial bit-level map. First, I used Logistic chaotic sequences to rearrange digital image pixels into one-dimensional (1-D) sequence, then the value of each pixel in the sequence was decomposed into k-bits which constituted a two-dimensional (2-D) bit matrix. Second, the spatial bit-level map was performed in the 2-D bit matrix to generate pixels with new values. Finally, the scrambling image was generated according to these pixels. This algorithm can scramble image based on the pixel’s position and the value and their corresponding probability. The experimental results show that this scrambling algorithm possesses perfect confusion properties and it can resist various attacks. Also it can apply to non-square image.
The Empirical Study for a Relationship Model in Software Development
Authors: Li Xiao Ming
Published: November 2012

In software industry, software crisis brings great trouble to software development. The coordination strategy is very important to the performance of software companies.This paper has built a relationship model between coordination and project performance on the empirical analysis of current software projects in China. The research result shows that software development is typical of R&D project and project manager plays an important role in vertical coordination in the present software industry in China.
Analysis for Quick Response Strategy Using OptQuest Simulation
Authors: Li Shan Liang , Wang Chun Hua
Published: November 2012

Simulation is a very powerful tool that helps evaluate the impact of business decisions on performance in an uncertain environment. OptQuest is an optimization tool of crystal ball, which can define random variables easily and display the result graphically. In this paper, the impact of quick response strategy on the performance is modeled and analyzed. To illustrate the issues, consider an example and compare the impact of different ordering policies using OptQuest simulation. Studies have shown that quick response had a positive impact on the performance. It can be seen from the process of modeling and optimization, OptQuest is an inexpensive way to test different actions and identify the most effective decision given an uncertain future.
The IC Card Data Encryption Research Based on the AES Algorithm
Authors: Yu Yang , Wang Shi Min
Published: November 2012

AES is a new generation encryption standard which is designed by the American National Institute of Standards and Technology (NIST) to replace DES. This paper described the concrete steps of the AES encryption algorithm which take the 128-bit keys as an example, including SubBytes, ShiftRows, MixColumns and AddRoundKey, and a detailed study of the IC card data encryption with the application of the AES algorithm.
Study on webGIS Traffic Engineering Archives Management System
Authors: Song Jin Bo
Published: November 2012

The goal of this thesis is to realize traffic engineering archives management, only need a few professionals can be realized on the inside area of an under construction and has built the traffic engineering in real time for file management and assessment, to ensure that the system can maximize the play of action, safeguard traffic engineering archives management. Based on the engineering archives management to promote engineering safety, quality, cost, schedule, and information management. Make daily collection of massive project archives data is used for traffic engineering the study, the sudden accident, for the authorities to provide real-time data on the basis of decision-making, reduce accidents caused by social and economic losses, for the Jiangxi province highway traffic safety situation evaluation and emergency command and to provide corresponding reference. At the same time the topic form multidisciplinary teamwork can also through combination of further promoting the Poyang Lake Ecological Economic Zone in the transportation industry personnel training mode of development.
Real-Time Simulation of Dynamic Cloud Based on Fractal
Authors: Hu Da Bin , Xiao Jian Bo , Hu Jin Hui
Published: November 2012

Cloud is a common, widespread natural phenomenon. Cloud modeling and rendering plays a great important role in virtual environments. This article based on texture splatting on particles method, and considers the clouds as a grade model. A method based on fractal is chosen to generate cloud texture and then texture is mapping to the facets. The method introduced in this article is simple and can improve the cloud modeling velocity. The results show that the method can meet the common requirements in scene simulation and have a good performance in real-time and reality.
Study of Active-Learning-Based Theme Crawling System
Authors: Ren Bin , Zheng Guo Xun , Zhang Su Li
Published: November 2012

This paper aims to design the active-learning-based theme crawling system and to realize the capacity of active learning of theme crawling by the use of semantic functions of ontology. The most conspicuous feature of this crawling system is the introduction of iterative process of ontology-incremental active learning. With the above circulating iterative process, the system can capture large quantities of theme-related web pages and the relatedness of the obtained web pages and the capturing rate are obviously superior to the crawling system without the ontology.
Design of PDF4172D Barcode Watermarking System Based on SOPC
Authors: Zhang Xiu Juan , Luan Jia Ming , Ni Li Na
Published: November 2012

This paper introduces the design of PDF417 two-dimensional barcode digital watermarking system with SOPC chip EP2C70F896C6 made by Alters fully. Analyzed structure and working principle of the hardware and software. System used video conversion chip VGA of DE2-70 development board made by Terasic Technologies and PCI bus interface chip SD card, realized the barcode watermark control with Verilog HDL and C language common programming. The system has many merits such as high velocity, good commonality and low costs etc.
Design and Implementation of a Secure Integrated Storage Network for Classified Information Based on IPSAN
Authors: Han Shu Jie , Li Di Yang
Published: November 2012

Aiming at the security threats of Integrated Storage Network (ISN) in network transmission and static storage of classified information, a Secure Integrated Storage Network (SISN) model is proposed. By designing a Security Initiator (SI) and a Security Control Model (SCM) with integration of techniques for identification, data encryption, access control and security auditing to guarantee the confidentiality, integrity and effectiveness of the storage. The simulation attack test was done to classified organizations which applying the SISN.The result prove SISN can guarantee the storage security of classified information effectively.
Survey to Automobile Electromagnetic Compatibility Simulation Software
Authors: Chi Yao Dan , Gu Hai Long , Gao Yin Han , Yang Xiao Tian , Zhang Sheng Qian
Published: November 2012

With the rapid developments of computer technology and computing electromagnetism, it is possible to simulate the electromagnetic compatibility of automobiles. At the beginning of the design, electromagnetic compatibility simulation analysis of automobiles can not only shorten the research cycle, but also reduce the cost. In this paper, we summarized the current commercial electromagnetic compatibility simulation analysis software, analyzed the features and applied algorithms of each software, and gave the simulation examples of Ansoft HFSS and FEKO.
A Framework of Smart Supermarket Based on the Internet of Things
Authors: Zhang Yan Gu , Shen Bin
Published: November 2012

In this paper, we propose a framework of smart supermarket using Internet of Things, which includes three layers: perception layer, data management layer and application layer. This framework is quite powerful, flexible and extensible for constructing smart supermarkets. The key technological issues for this framework are also discussed.
Application of the Internet of Things Technology in the Intelligent Park
Authors: Yan Ai Mei , Yang Li Fang , Wu Liang , Jia Nan
Published: November 2012

Firstly the system architectures of the Internet of Things technology and intelligent park were introduced, then the core functions of the intelligent park-the intelligent park management system was described detailed, which established the sensing system to detect the whole park by Internet of Things technology that includes the temperature sensor, multifunction meter and fiber network which covers park. The applications of the Internet of Things technology in the intelligent park include the distribution structure monitoring, the process monitoring, the equipment temperature monitoring, the photovoltaic monitoring and the power quality monitoring. These applications can realize the real-time monitoring of the intelligent park that includes the all kinds of electric parameters and the operation state, also can find the fault and alarm in order to guarantee equipment normal operation, provide security support for reliability service of the power system equipment and technical support for loading coordination optimization control.
Structure Design and Dynamic Characteristics Analysis of the Cartesian-Coordinates Automated Warehouse
Authors: Zhang Hui , Chen Yan
Published: November 2012

This paper designed a cartesian coordinates automatic warehouse, and used ANSYS Workbench software to analyze its statics of the beam model with finite element method, then arrived at conclusions that the structure of automatic warehouse is reasonable which meets the technical requirements; the lower-order natural frequency of the system is far higher than the input frequency; the lower-order vibration modes are shown as the deformation of X axis' beam in horizontal direction and bend in the vertical direction, so we should improve its stiffness while designing it.
Study on Index System of Enterprise Network Resource Coordination Maturity Evaluation
Authors: Yan Jian Fen
Published: November 2012

Coordination effect among enterprise network behavior subjects could be evaluated by coordination maturity. Maturity model of enterprise network resource coordination includes four dimensions: the coordination cost, coordination process, coordination method as well as the ability to learn. According to the level of the four dimensions, they can be divided into four levels: the initial level, aggregate level, standard level and optimization level. The scientific evaluation of enterprise network resource coordination maturity, can let the enterprise network behavior subjects understand the condition of resources coordination in their network, thereby improve the degree of network resource coordination, improve and perfect coordination mechanism. Therefore, this text has established the enterprise network resource coordinate maturity index system, which includes six first level indexes and second level indexes. The first level indexes include coordination costs, exchange of information, intelligence resource sharing degree, corporate culture synergy degree, smooth communication and problem solving ability for coordination subjects to the feedback.
An Empirical Study on Organization Design for Traditional Manufacturing Industry
Authors: Ye Zheng , Zheng Jiang Zhuang
Published: November 2012

In the past twenty years, traditional manufacturing industry has great influences on China’s economic growth but it meets more and more difficulties in the new economy. This paper aims to trace the successful organization design of firms in traditional manufacturing industry that have sustainable development in the new economy evolution. So this paper first reveals the relationship between organization design and new economy evolution for traditional manufacturing. Then put forwards an empirical analysis with firms in Lanxi cotton textile industrial cluster in Zhejiang province. The results show that the new economy evolution has a positive effect on organization design. In detail, in the five factors of new economy evolution, only the resources in new economy has a negative influence to organization design.
A Framework for Implementing RFID-Based Cutting Tools Management System in a Machining Workshop
Authors: Sun Pei Lu , Jiang Ping Yu
Published: November 2012

As one kind of indispensable consuming resources, efficient cutting tools management plays an important role in increasing production capacity of machining workshop and ensuring the products quality. In this paper, a RFID-based cutting tools management system (CTMS) is proposed and its implementation framework is established. Furthermore, four key enabling technologies are addressed to investigate the real-time monitoring, dynamic scheduling, inventory alert and life prediction of cutting tools. Finally, a simple example is given to demonstrate the operation procedure of the established CTMS.
Reliability Analysis Using GO Methodology and Grey System Theory
Authors: Zhang Gen Bao , Li Yue , Liu Jian
Published: November 2012

Machining center is a complex mechatronical product. Because of numerous influencing factors on its reliability, parts of their inaccurate description and the uncertainty of its failure behaviors, it is very difficult to analyze its reliability by traditional reliability model which is based on probability theory. To solve this problem, grey system theory combined with GO method reliability analysis was presented, and sequentially a practical reliability analysis model considering various operating conditions of the components of machining center was established. The method was used in reliability analysis of hydraulic system of Tray Automatic Exchange Device (TAED) of machining center. Firstly, through a systematical analysis of hydraulic system of tray automatic exchange device of machining center, its basic structure model was summarized, and the model of GO chart for the hydraulic system was established. Then, the gray dynamic analysis for the hydraulic system was derived, and a feasible method of dynamic analysis for the performance reliability of hydraulic system was provided. Finally, the availability and correctness of this method in the analysis and reliability evaluation of machining center was verified by comparing the calculated result of this method with that of the traditional static GO methodology and the FTA. This approach provided a theoretical basis for the prevention of failures of the hydraulic system of tray automatic exchange device, the improvement of the system reliability and security, and the development of security controls.
Analysis on Operation Principle of Doubly-Fed Wind Power Generator
Authors: Wu Bing , Wang Jian Liang
Published: November 2012

Basing on its advantages, doubly-fed wind power generator has become one of mainstream model of wind power generator which is connected with power network directly. But at present there is no relevant articles that can describe the operation principle of doubly-fed wind power generator in detail. The electromagnetism relation of doubly-fed wind power generator is discussed detailedly in this paper based on the basic theory of AC motor, and finds the equivalent circuit and vectorgraph, analyzes the energy transfer relation. This thesis offers theory basis for the design and control of doubly-fed wind power generator.
Design on High Vacuum System with Molecular Pump
Authors: Zhang Chong , Zheng Jin Hua , Li Cong Hui , Chao Yun Feng , Li Long Jun , Wu Ying Hua
Published: November 2012

This paper aimed at finishing a two-stage oil-free high-vacuum system using a molecular pump as the main pump and a rotary vane pump as the backing pump. Before the pump’s inlet, there is a molecular sieve. With the assistance of the high and low vacuum measuring instruments and other accessories, the system can achieve limiting vacuum of 5×10-5Pa in the vacuum chamber whose volume is 0.085m3 and provide the high vacuum needed for vacuum coating equipments whose magnitude is 100mm.
Numerical Simulation on the Inner Flow Field of Ventilator Diffuser and Research on Energy-Saving
Authors: Zhu Xiu Chuan
Published: November 2012

Ventilator diffuser with appropriate structure can improve the character of the diffuser . Building models of the log spiral diffusers of ventilator were classified and combined according to the length of post catheter, the condition whether the entrance bucket has been installed or not, and the length of the entrance bucket. Based on EFA software for hydrokinetics, the inner flow field of all combined diffusers were simulated and the related data were analyzed. In this way, graph of the static pressure coefficient (Cp), the atmospheric pressure coefficient (Cpa) and the diffuser efficiency (η) will be concluded under the work condition of every combination. By numerical analysis， an issue that the length of postpositive catheter, the condition whether the entrance bucket has been installed or not, and the length of the entrance bucket influent performance of the diffuser will be concluded. The issue studied would be a helpful reference for design to the log spiral diffuser of ventilator and for research on energy -saving.
Virtual Manipulation of Eon Studio-Based for High Speed Labeling Machine
Authors: Zhang Yu , Dou Yi Man , Cai Wen Zheng , Zhu Yun Qin
Published: November 2012

High speed labeling machine builds virtual models and completes the design and realization of simulation manipulation by using the platform of virtual reality application of Eon Studio and SDK software, which realizes the communication message transmission among modules and gives the main function through the multi-party communication mechanism and function description, realizes the man-machine interaction function by applying the event driven and routing mechanism, solves better the conflict of multiple Agent by using Agent based-on rule-based reasoning and improved evidence theory, and eventually meets virtual manipulation function requirements of high speed labeling machine
Double-Acting Air-Oil Intensifier Driven by Twin Roller Piston Air Cylinder
Authors: Ding Wei Ya , Hu Xue Wu , Sheng Xiao Ming
Published: November 2012

The double-acting air-oil intensifier designed in this paper can continuously output high pressure oil which meets the requirements of equipment that is high-pressure and with recirculation motion and it is driven by pneumatic substituting the independent hydraulic power source driven by electric motor. It consists of twin roller piston air cylinder, force amplifier, hydraulic cylinder and oil supercharger. The piston of air cylinder propelled by pressure gas makes cyclic motion and the driving force of piston increased by force amplifier pushes the piston of hydraulic cylinder and forces out hydraulic oil, then oil is input to the system after the second time when pressure amplification by oil superchargers. It has many advantages such as higher pressure ratio, compact structure, high efficiency, low cost and easy access to regulate pressure and flow rate.
Study on the Influence of Meridional Channel to Centrifugal Compressor Performance
Authors: Wang Jie , Wang Dong , Cai Wen Xiang , Gong Ke
Published: November 2012

The meridional channel has an important effect on the flow properties of centrifugal compressor. High performance meridional channel can be obtained by determining Bezier curves, which can realize local optimization to the airfoil expediently. Three kinds of meridional channel model are established basing on Bezier theory. A method to calculate the meridional channel width is proposed using the expression of UG and the distribution law of inscribed circle and stream surface is given as well. By means of numerical simulation, the effects on the flow capacity of different variation of inscribed circle and stream surface are compared in the same inlet and outlet geometric parameters. The result indicates that reasonable design of meridional channel increases the efficiency, improves the blockage point flow significantly, and provides with a broader and stable operating range to compressor.
Integrated Dynamic Characteristics and Application in Semi-Active Dynamic Absorber of Magneto-Rheological Fluids
Authors: Li Shi Zhen , Li Gong Yu , Kong Xiao Wu , Wei Jian Hua
Published: November 2012

As a new type of controllable rheological smart material, Magneto-rheological Fluids (MRF) are widely used in the field of vibration control. This article investigated their integrated dynamic characteristics in squeeze mode and shear mode. Two prototypes were designed and fabricated. The dynamic test for the two prototypes was performed on a simply supported beam vibrating device with the methods of drop-hammering and sweep-frequency measuring. The experimental results demonstrate that the damping ratio of the prototype in squeeze effect presents linearly and widely controllable from 0.0948 to 0.2268 with the increase of the coils’ excitation current, behaving as a variable MR damper. However, its natural frequency remains unchanged. It is also shown that the natural frequency of the prototype in shear effect increases significantly from 18Hz to 24 Hz, acting as a semi-active dynamic vibration (SDVA) absorber with broadband vibration absorption for the maximum attenuation of up to 74.3%. This study provides guidance for engineering applications of MRF.
Cloud Machining Community for Social Manufacturing
Authors: Cao Wei , Jiang Ping Yu
Published: November 2012

Under the great trend of social manufacturing, the professional social division of labour in manufacturing industry and the distribution of manufacturing resources force more and more enterprises focus on their core business than ever before and outsource most of the non-core manufacturing activities to other professional organizations. In this condition, this paper proposed a new-type cloud system which is call cloud machining community (CMC) to integrate the distributed MRs and provide on-demand services for service requestors who need them. The framework of CMC together with it working flow is proposed. At last, some key enabling technologies are talked about in detail, such as virtual access of machining resources (MRs) and machining demands (MDs), retrieval and matching between MRs and MDs, generation of machining groups and creditworthiness evaluation mechanism.
Study on Adaptive Dual-Voltage Method to Improve the Control Performance of High-Speed Solenoid Valve
Authors: Su Ming , Liu Yu Gang , Yang Hong Tao
Published: November 2012

It is presented that a new adaptive dual-voltage method to improve the control performance of high-speed solenoid valve and a control device of high-speed solenoid switch valve that could adapt to the pressure change of supply inlet is developed. Based on AMESim, this paper has processed the static and dynamic performance simulation of adaptive dual-voltage method to improve the performance of high-speed solenoid valve. This paper has built an experiment platform of adaptive dual-voltage method to improve the control performance of high-speed solenoid valve, and carried out corresponding experiments. Both simulation and experiment have proved that the method had obviously effect to improve the control performance of high-speed solenoid switch valve and the developed high-speed solenoid switch valve can effectively control the system
Research of Encoding Rules for RFID Tags Used in Automobile Parts Production Line
Authors: Luo Zhi Yong , Zhang Rong , Wang Qing
Published: November 2012

Traditional bar code technology has some limitations due to the great dependence on operators and restrictions caused by the work environment. Therefore, it’s very important to introduce RFID technology and the kernel of using RFID technology is to establish a reasonable set of encoding rules for RFID tags. This paper designed a set of encoding rules for RFID tags based on analysis of production process, RFID system architecture and encoding requirements which are used in automobile parts production line, and then studied thoroughly on encoding rules. The automation and intellectualization of automobile parts production line are gradually realized and the efficiency is greatly improved due to the application of this encoding rules.
Research on New Vibratory Energy Power-Assisted Automobile Hydraulic Steering System
Authors: Ding Zhi Hua
Published: November 2012

A vibratory energy-recovery hydraulic damping system is introduced which can recycle some vibratory energy and reduce oil consumption. Pressurized oil from the system can be used for braking system, power-assisted steering, hydraulic clutch operating mechanism and so on. An inflatable list tube shock absorber is designed which can recycle vibratory energy. It’s structure and operating principle are introduced. At last, Research is made on structure and operating principle of new vibratory energy power-assisted automobile hydraulic steering system. The vibratory energy-recovery hydraulic damping system had reported the national invention patent (CN102152778A), the vibratory energy power-assisted automobile hydraulic steering system also had reported the national practical new patent (ZL 2011 2 0101078.4).
The Research about Mini-Ridging Machine of Tobacco
Authors: Jin Li Ying , Zhu Yun
Published: November 2012

Yunnan is cured country, but special machinery and equipment design and manufacturing level is low, the development and use of infancy. Distributing in a mountainous area tobacco region, still with animal , manual operation, limiting the labor efficiency and raising the level of modern. Therefore, this study intends to design of use Solid Works software and flue-cured tobacco supporting the weight of the light intensity is good, easy to install micro-ridge, the main research of rotary tillers supporting flue-cured tobacco ridging bodies planting in hilly smaller plots smooth operations, improve the adaptability to make up for the deficiencies of the large ridge.
Modeling and Simulation of Two-Way Quantitative Motor Synchronization System Based on AMESim
Authors: Chen Yong Qing , Liu Pan , Zhang Shao Qing
Published: November 2012

According to the working principle of two-way quantitative motor, via the use of hydraulic component design library provided by AMESim, the paper builds simulation model of the performance of the synchronization systems by adjusting the specific parameters of the simulation model, providing a basis for the design and selection of the deduction valve.
Study of Relationship between Supercharged Boiler’s Furnace Temperature, Radiant Rate and Boiler’s Operation Parameters
Authors: Zhou G.Y. , Du Fei , Su Gao
Published: November 2012

In this paper, visualization detection technology of supercharged boiler’s combustion in furnace is been used to take photo of the flame in furnace, and calculate temperature images and radiant rate images corresponding to flame images, and get average temperature and average radiant rate value, and gain relationship between average temperature and average radiant rate value. Studies show that: according to image of flame in furnace taken in different working conditions, average temperature and average radiant rate value have the same change rule. Working condition of boiler is higher, fuel consumption and radiant temperature are higher, and average radiant rate is lower, and operation parameters such as fuel press, steam temperature and pressure difference of gas are higher, and vice versa.
A Coupled Method for Dynamic Analysis of Offshore Floating Wind Turbine System
Authors: Yan Fa Suo , Shen Peng Fei , Wang Hong Wei , Zhang Jun
Published: November 2012

A coupled dynamic analysis method is introduced for numerical simulation of floating wind turbine systems in this paper. A numerical code，which has been developed to perform couple hydrodynamic analysis of floating body together with its mooring system, is extended to collaborate with wind turbine simulator to evaluate the interactions between wind turbine and its floating base. To verify the coupled method, a dynamic response analysis of a spar type floating wind turbine system (NREL offshore-5MW baseline wind turbine) is carried out separately by the coupled Morison method and radiation-diffraction theory. Numerical results and comparison are presented. It turns out that this coupled method is competent enough to predict hydrodynamic performance of floating wind turbine system. The numerical results derived in this study may provide crucial information for the design of a floating wind turbine in the near future.
Design of Induction Motor Variable Frequency System Based on DSP
Authors: Liu Yu Gang , Su Ming
Published: November 2012

As the development of the Microprocessor technology, Power electronic technology, Motor manufacturing technology and modern control theory, Variable frequency system is used more and more widely.This paper introduces a design of motor variable frequency control system．AC-DC-AC-circuit is used in its main circuit, and U/F control strategy is used in its controlling method．Based on the system parameters，the calculation and selection of the component parameters are carried out．Finally，the intelligent power module(IPM)is used as a power inverter circuit switching devices and TI DSP(TMS320LF2407A) is as a core control to improve the precision and stability．The experimental result indicates that the driving system has the stable performance, high anti-interference and high value.
Experimental Study on Diesel Engine Emission with Mixed Fuel of GDE and Diesel
Authors: Lu Ke Jiu , Dai Xi Liang
Published: November 2012

An experimental study is made on the emission of a single-cylinder direct injection diesel engine with different proportions of GDE and diesel. The study shows the mechanism when GDE is added to diesel to reduce diesel emission. And an analysis of pollutant emission is made on the regularities of variation with engine load changes. The results show that the addition of diesel oil in the volume fraction of 10% to 20% of GDE can significantly increase the thermal efficiency, shorten the duration of diesel combustion, substantially decrease carbon smoke and CO in emission under the high-load conditions and slightly lessen the NOx emission, but HC emission still remain basically unchanged.
Research on Transport Process of the Intelligent Stereo Garage
Authors: Wu Shang Sheng , Li Wei , Huang Ze Xing
Published: November 2012

A method of depositing and picking up cars automatically was designed by using Visual Studio 2005 software in this paper，based on FINS protocol, Ethernet communication technology, and RF card technology synthetically. An upper layer application program has been developed on the basis of charge requests, entrance states and turntable states analysis. Furthermore, the overall idea of transport process and the frame structure were devised while the specific application of OMRON PLC was researched.