bluuebunny/crossref_metadata_2025 huggingface dataset:
Research and Realization of Permanent Magnet Synchronous Motor Control Based on Model for Electric Vehicle
Authors: Huang Zhi Yu , Xian Zhi Liang , Li Jing Jun , You Yun Gong
Published: August 2013

One method which is based on model to settle the long development cycle of driver motor control software is adopted for Electric Vehicle (EV). It is to achieve Field Oriented Control algorithm (FOC) designing, model building, and microcontroller driver integration, task scheduling, code generation; Model simulation experiments are completed aiming at three kinds of running conditions such as a constant speed, accelerating, on load; finally, these running conditions are realized in EV and dynamometer platform. Simulation and experimental results show FOC has a well performance on speed regulating by comparing technical parameters with Chang An Ben Ben Mini, adopting the method also shorten the development cycle of motor control software.
Computing Invariants for Hybrid Systems
Authors: Wu Bin , Zou Xiao Guang
Published: August 2013

This paper address the problem of generating invariants of hybrid systems. We present a new approach, for generating polynomial inequality invariants of hybrid systems through solving semi-algebraic systems and quantifier elimination. From the preliminary experiment results, we demonstrate the feasibility of our approach.
Design and Application of the Indoor Environment Monitoring & Control System at Tianjin First Central Hospital
Authors: Chen Chen
Published: August 2013

With advance of our human beings science and technology and enhance of the living standards, more and more people have addressed higher requirements on the environmental conditions in a hospital, therefore, the traditional and no-intelligent monitoring devices are being replaced by the automated and networked monitoring systems gradually. In this case, application of the wireless sensor network just fits this need. This paper proposes the Tianjin First Central Hospital indoor environment monitoring & control system of distributed acquisition and execution, and centralized management by focusing on the needs for the technical indicators of the hospital indoor environment. During design of the system, an universal design concept was put forward, and also a non-standard communication protocol for the wireless sensor network designed independently in combination with the OSI open standard. In this paper, realization of the communication protocol among the nodes with embedded software and the operation mechanism of the modes themselves are discussed, also a console panel has been developed for the data center. Several software design algorithms are proposed with respect to the network layout. This paper also describes the test platform of the Tianjin First Central Hospital indoor environment monitoring & control system established with the network components designed, and provides the test and verification results, including the monitored data of the various gases, corresponding automatic control functions, and underlay BER analysis. The results show that this system can basically realize automatic monitoring on the Tianjin First Central Hospital indoor environment. At present, the sensitive gases include CO, CO2, O2, NH3 and formaldehyde, sensitive environments temperature, humidity and light intensity, and controlled targets ventilation and lighting. This paper offers an optional solution for environment monitoring and has certain theoretical value and engineering significance.
A New Round Innovation of C-GIS
Authors: Qian Kai , Han Guo Hui , Yuan Duan Lei , Dong Hua Jun
Published: August 2013

C-GIS is one of China's emerging medium - voltage electrical equipment packages. It is of small size, high reliability, adaptive advantages of diversity and changing environmental conditions. With the development of smart grid in China, C-GIS to the development of intelligent. According to relevant experts pointed out that the development of the intelligent switch cabinets along the two routes: First, the Device status response to the power plant main control the computer by remote control, implementation of intelligent switches and the entire system. This is the intelligent power plant level; Second, the intelligent switch ontology. The latter more acceptable to foreign and domestic manufacturers. Because intelligence is the most basic, most reliable of the components of intelligent, Mechanical by traditional mechanism to the electronic design of moving mechanism and innovation has put in front of our designers. The author from the perspective of institution design of the inflatable Cabinet (c-gis) technical aspects of design.
The Design of Coal Gas Purification System of Ore Smelting Electric Arc Furnace Base on Micro-Differential Pressure Control
Authors: Lu Xiu He , Zhang Bin
Published: August 2013

In the paper, the generating process of the furnace gas in ferroalloy smelting process is expounded, taking the gas purification recovery system project of the four ore smelting electric arc furnaces in Sinosteel Corporation Jilin Ferroalloys Co., Ltd as background. The process of the gas purification system is analysed, base on the pipe network structure and the process control requirements in the gas purification recovery system by the current method of the washing tower, venturi tube and the dehydrating tower. The main design of the upper and lower computer control is adopted. The collection of multi-class parameters and the signal conversion mode is established. The coal gas monitoring system with the double closed-loop control of micro-differential pressure of furnace mouth and the reflux valve opening degree is found base on PI control method. It can solve interactive allopatric communication problem between the control room and the pump room. It also can achieve gas purification system integrated automation management with many ore smelting electric arc furnaces. The system runs stably by the assessment of the actual operation. It also meets the actual needs of production.
On Iterative Adaptive Dynamic Programming
Authors: Cui Chang Qing , Wang Yi Qiang , Yang Chun Yan , Yang Bao Sheng
Published: August 2013

Linear system is very seldom in actual control works, so there is more engineering significant of researching on the actual nonlinear system. Time delay phenomenon is the objective phenomenon exists in nature. Neural network based on adaptive dynamic programming principle is selected to implement algorithm. The algorithm contains model network training, H network training for time delay function, critic network training. Before running this iterative algorithm, training the model network first, the model uses a three-layer BP network to realize. Time delay function network H(K) is to approximate the functional relationship between the current control input and the delayed input. The critic network is used to approximate system performance function. The simulation results show that the proposed iterative adaptive dynamic programming can solve for the optimal control of delay nonlinear systems.
The Research of Anti-Collision Slot Algorithm of RFID on Robotics
Authors: Luan Hong , Sun Jie , Liu Li
Published: August 2013

In order to improve the collision problem of getting information of RFID-assisted positioning system in the robot. This paper will build a mathematic model for the time slot method by quoting Markov chain, that use it as the basis analyze the time slot method performance and get the relationship between the number of the time slot and the electronic tag identification, so we can reasonable plan the positioning tag number. This technique is applied to the robotics positioning recognition system.
A Tangential Tracing Control Algorithm for NC Glass Cutter Machine
Authors: Shi Hong Lei , Huang Zu Guang , Zhang Cheng Rui , Wang Hong Hui , Wang Ai Qun
Published: August 2013

To ensure the scribe-wheel is always forward along the tangent direction of the cutting path, a new planning algorithm is proposed for the cutter shaft rotating control. The short linear segments used for approximating the cutting curve are separated by the equipartition conditions. For the satisfied ones, the angle between the adjacent segments is linearly interpolated and the cutter shaft rotates without stopping the machine. Otherwise, it needs to stop and rotate the shaft. The experiments show that the deviation error of scribe-wheel is small, and the error existing period is short, which proves the algorithm can achieve the scribe-wheel tangential tracing and satisfy the accuracy requirements while cutting complex shapes.
Research and Design of Traffic Flow Monitoring System Based on Internet of Things
Authors: Feng Jun
Published: August 2013

The existing traffic flow monitoring system has some defects, including dispersed data collection, difficult to accurate and real-time monitor the vehicle motion process, low degree of all types of vehicle identification and limited monitoring performance. In order to solve all the problems above, this paper designs traffic flow monitoring system bases on Internet of Things. Using the core data collected by ZigBee wireless communication technique, the system adopts optimal scheduling algorithm to design the system. Simulation experiments are carried out on the basis of real-time collected by the system. The results show that the system achieves high efficiency and performance monitoring of the vehicle types, real-time classification, vehicle coordinate real-time positioning while operation, automatically receive real-time traffic data, and efficient scheduling.
Analog Circuit Fault Diagnosis Based on LVQ Neural Network
Authors: Zhou Shi Guan , Li Guo Jun , Luo Zai Fei , Zheng Yan
Published: August 2013

As an application of artificial intelligence technique in the field of analog circuit fault diagnosis, intelligent fault diagnosis system based on artificial neural network achieved certain success in practice. However, because neural network need for normalization preprocessing of sample before training, prolong the time of fault diagnosis, which is limited in the actual use of the diagnosis system. And the characteristics of LVQ(learning vector quantization) network is not need for normalization and other preprocessing of training samples, therefore, reducing the training time of neural networks. In this paper, the structure and training methods of the LVQ neural network are presented and the specific implementation of the diagnosis system is illustrated with examples. Simulation results show that the mathematical model has a better diagnostic effect. Compared with other methods, this diagnostic method, with the broad application prospect of its structure and method, is simple and practical and so on.
Architecture and Function Modeling Research on Fusion Diagnosis of Reciprocating Engineering Fault
Authors: Wang Li Yong , Li Le , Li Yang Long
Published: August 2013

On the basis of complicated structure, various movement forms and high difficulty of fault detection for reciprocating engine, we have implemented the research on fault diagnostic approach by multi-sensor information, carried out the multi-source information fusion based on crankshaft phase signal, vibration signal, ultrasonic signal, pressure signal, ignition voltage signal and oil analysis information, created distributed structure model with multi-source information fusion, explained the parallel, distributed, serial and tree topology structure models, and established total model for multi-source information fusion of reciprocating engine fault diagnosis.
Analog Circuit Fault Diagnosis Based on Particle Swarm Optimization Algorithm and Adaptive Learning Rate Algorithm
Authors: Han Bao Ru , Chen Shuang , Wu Heng Yu
Published: August 2013

BP neural network is widely used as a multilayer feed forward neural network model. The paper puts forward a kind of adaptive learning rate algorithm and particle swarm optimization algorithm hybrid algorithm combining in order to solve the traditional BP algorithm is easy to fall into local extremum problem. So that the particle swarm optimization algorithm and adaptive learning rate algorithm are complementary. The hybrid algorithm has extensive mapping ability of neural networks and particle swarm rapid, global convergence characteristics. The simulation shows that the hybrid algorithm realizes the detection and location of analog circuit fault avoidance, has satisfied effect.
Study on Vertical-Horizontal Coupling Vibration of Mill Rolls Based on the Nonlinear Rolling Force Model
Authors: Hou Dong Xiao , Peng Rong Rong , Liu Hao Ran , Wang Ye Chi
Published: August 2013

Based on the Orowan unit pressure differential equation, a vertical-horizontal dynamic rolling force model of workpiece was studied. Then, considering the influence of the rolling mill structure, the vertical-horizontal coupling vibration dynamic model of mill rollers was estabilished. The parse approximation solution of coupling system were carried out by using multiple-scale method, and the equations of amplitude frequency were obtained. Finally, the computer simulation analzed the characteristics of the system in different parameters, which can supply theoretical bases for suppressing vibration of rolling mill.
Analysis of Residential Loads Behaviors Integrated with Distributed Generation under Different Pricing Scenarios
Authors: Zhao Hui Ying , Liu Guang Yi , Jia Hong Jie , Yang Zhan Yong , Fan Shi Xiong
Published: August 2013

Demand response nowadays plays a key role during the electricity transaction. Proper price signal can result in conspicuous peak shifting. This paper analyses changes of load behavior under different price scenarios, and shows how demand response gentles fluctuations of distributed generation (DG). This study compares the load behaviors under three different tariff strategies, and concludes the contribution of demand response to gentle the instability of DGs and peak load shifting.
Research on Power Flow Control of UPFC Based on PSASP/UPI
Authors: Zhang Fang , Chen Jian Ping , Li Chuan Dong , Wu Yan Juan
Published: August 2013

The main objective of power flow control for unified power flow controller (UPFC) is to increase the transmission capacity over the existing transmission corridor or line. This paper presents a practical engineering methodology of embedding the power flow control model of UPFC into the commercial software -- power system analysis software package (PSASP) based on its user program interface (UPI) function. In the proposed methodology, the interface currents of UPFC series side and UPFC shunt side between the UPFC device and the network are used to control the transmission line power flow and UPFC bus voltage, respectively. In UPFC series side, the current of UPFC series branch is calculated from the power target equation of the controlled line. In UPFC shunt side, the shunt reactive current of UPFC is used to control the bus voltage. Simulation results on a practical power system show that the proposed methodology can be efficiently applied to the engineering research and analysis of the real power grid with UPFC with good convergence and only one control parameter needed to be prescribed.
The Influence of Transformer Leakage Inductance and Distributed Capacitance Parameter on the Output of Switch Power Supply
Authors: Zhang Zhi Wei , Han Guang Yun
Published: August 2013

Transformer is an important component of switch power supply system, the distribution parameters of the transformer affects the performance of switching power supply. This paper analyzes the simulation of transformer parameters, studies the effects of transformer leakage inductance and distributed capacitance ,and calculate it by using numerical analysis method. To ensure reliability of switch power supply , 2D modeling is used for the simulation of transformer in Ansoft Maxwell.
Double Closed-Loop Control of the Three-Level Rectifier Based on Synchronous PI Current Decoupling
Authors: Lin Cheng Wu , Liu Tian Jiao , Gui Jun
Published: August 2013

This paper analyzes the mathematical model of the three-level PWM rectifier in the three-phase stationary coordinate system and the two-phase synchronous rotating coordinate system. On this basis, the synchronous PI current double closed-loop decoupling control strategy is used to eliminate the impact between the d-q axis and relieve independent control of two axes. In order to simplify the complexity of the vector synthesis, the three-level space vector modulation (SVPWM) algorithm is studied. Transform the three-level space reference vector synthesis to the two-level. The mathematical model of the theoretical analysis are verified with Matlab/Simulink. The simulation result demonstrates that the design method is reasonable and effective, which makes the PWM rectifier excellent dynamic and static performance.
Design and Develop of Functional Safety Temperature Transmitter for Fault Status
Authors: Wang Zhi Ping , Xu Ai Dong , Song Yan , Yan Bing Jun
Published: August 2013

According to the requirements of the functional safety temperature transmitter high reliability, this paper selects the micro-power voltage reference, the reset monitor, the D-type flip-flop and the OR gate to design the functional safety temperature transmitter protection circuit for fault status. The protection circuit takes power from the data line of HART fieldbus by micro-power voltage references. According to the control signal of the functional safety transmitter, the protection circuit utilizes the state latch of D-type flip-flop, and realizes the functional safety temperature transmitter protection circuit for fault status.
Design of Antenna Minimization for Wireless Sensor Network Node
Authors: Ren Ling Zhi , Jiang Quan Sheng , Liu Li
Published: August 2013

With the development of WSN (Wireless Sensor Network) technology, WSN node requires its volume to become gradually small. Antenna of WSN node occupy the most area, therefore this paper puts forward minimization design for antenna of WSN node. A printed dipole antenna is designed and then by using antenna flexural method, the antenna structure is improved with minimization design. Under the condition of several performance indexes of the antenna can be met, the antenna area after minimization is decreased by about 39%.
Analysis of Time-Phase Modulation for Multiple Users
Authors: Fu Lin Yu , Deng Bing , Cui Shi Qi
Published: August 2013

As a kind of UNB modulation method, time-phase modulation has a specialty that its power spectrum is concentrated around the carrier frequency. Thus, it can work within a narrow channel interval without interfering the conventional communication system. In this paper, the performance of multiple users was analyzed for time-phase modulation based on the correlation coefficient. It can be found that wider carrier frequency difference between adjacent users is necessary for time-phase modulation due to the modulated information consisted in the very wide sideband. Moreover, the influence between multi-users will fluctuate versus the difference of carrier frequency, which diminishes as a whole when the difference of carrier frequency increases.
De-Noise of the High Frequency Corona Current with Wavelet Analysis Method
Authors: Zhu Lei , Zhu Jun , Lü Fang Cheng , Liu Yun Peng , Geng Qing Zhong
Published: August 2013

In order to analyze wide frequency band corona current characteristics of the UHV bundled conductors, a corona current measurement system is developed. The corona current signal is transmitted to the lower computer through the wireless network. And the current signal collected in this way is safe and reliable. The de-noise method with wavelet analysis is introduced and compared with some common used methods. The result of the de-noising analysis of the wide frequency band corona currents of bundled conductors in the corona cage shows that the wavelet analysis method could be used to de-noise high frequency corona current in the corona cage, and the de-noising effect is apparent.
Improved Speech Enhancement Algorithm Based on Bark Bands Noise-Estimation for Non-Stationary Environment
Authors: Lu Dong Yu , Tian Guan Yu , Lu Xiao Shan , Ma Xin , Tian Lan
Published: August 2013

The conventional spectrum subtraction algorithm cannot effectively suppress the noise under highly non-stationary environment and results in the remaining music noise is often heard in the enhanced speech. In order to improve the speech enhancement performance, a novel denoising algorithm is proposed, which is based on speech endpoint detection using spectrum variance and the dynamic spectrum subtraction in Bark bands. According to human auditory characteristics, the Bark bands spectrums of the noisy speech signal are firstly calculated, and the noise power spectrum of each Bark band is then tracked and estimated by the improved minima controlled recursive averaging method. This noise estimation is adjustable frame by frame and more accurate for non-stationary environment. The experiment results showed that the proposed method can suppress the noise more efficiently than the conventional spectrum subtraction and the remaining music noise is almost eliminated.
Recent Frequent Item Mining Algorithm in a Data Stream Based on Flexible Counter Windows
Authors: Guo Yan Yang , Wang Gang , Hou Feng Mei , Mei Qing Ling
Published: August 2013

In the paper the author introduces FCW_MRFI, which is a streaming data frequent item mining algorithm based on variable window. The FCW_MRFI algorithm can mine frequent item in any window of recent streaming data, whose given length is L. Meanwhile, it divides recent streaming data into several windows of variable length according to m, which is the number of the counter array. This algorithm can achieve smaller query error in recent windows, and can minimize the maximum query error in the whole recent streaming data.
Image Threshold Segmentation Method Based on the Gradient Adjustment and Improved Moment Preserving
Authors: Zhu Jia Xiong , Tong Qiangr
Published: August 2013

The traditional moment preserving (MP) may cause owe-segmentation, over-segmentation and ignorance of image details, so this paper introduced a image threshold segmentation method based on the gradient adjustment and improved MP. Firstly, the method got a new image by sharpening the original image, then acquired the initial threshold by MP for the new image, afterwards, obtained the final threshold by the image histogram mean improving the initial threshold, finally, segmented the sharpened image. Experimental results showed that the proposed method can not only well resolve the problem of owe-segmentation and over-segmentation, get better segmentation result, but also retain a wealth of details and advantage of the original MP. The algorithm was simple, efficient and fast.
Realtime Recognition of Attention State by Complexity Analysis of Electroencephalogram
Authors: Huang Li Yu , Ma Hong Juan , Jin Lang , Lu Rong
Published: August 2013

The object of this paper is presenting a novel approach to classify the attention state and non-attention state. Firstly, the raw recorded electroencephalogram (EEG) data were decomposed by the algorithm of wavelet packet, several main EEG rhythms were extracted; then a complexity measure of these rhythm signal, approximate entropy (ApEn) was calculated respectively, and the values were used as input vector of a trained support vector machine (SVM), the output of this SVM will be the result of classification. The average performance obtained for the proposed scheme in classification is: sensitivity 73.7%, specificity 71.4% and accuracy 72.5%.
A Self-Adaptive Edge Detection Approach by Improved Isotropic Sobel and OTSU
Authors: Huang Ji Peng , Qiao Shuang
Published: August 2013

This paper presents a self-adaptive approach to detect the edge of target in a digital image, and the proposed approach is based on eight-direction Isotropic Sobel and OTSU. Simulation experiments in matlab show that the approach can set the threshold value of an image automatically, has high precision in image detection, good connectivity, the uniform image edge magnitude for all directions and suppresses the noise well.
A Way to Improve the Efficiency of High Frame Rate Imaging Algorithm with Limited Diffraction Beams
Authors: Wei Yong Mei , Peng Hu
Published: August 2013

Jian-yu Lu has studied a high frame rate (HFR) ultrasound imaging system since 1997. In the system, weighting echo signal by limited diffraction beam spends most of the computing time of imaging algorithm. In the paper the spectrum of HFR ultrasound imaging is analyzed. Combining limited bandwidth properties of image spectrum and the plane wave characteristics of limited diffraction wave, a method, which can improve the efficiency of weighted processing algorithms, is put forward. Simulation results show that it effectively reduces the calculation amount of weighting, meanwhile maintaining image quality.
Design of CAN-FlexRay Gateway based on Node Mapping Methods for In-Vehicle Network System
Authors: Zhao Chun Lei , Xu Yi Nan
Published: August 2013

The In-Vehicle Network System is a main channel to transmit electronic signals among each automotive node. In order to share the node information from both of chassis and body networks in automobiles, the gateway system is used to realize the communication between CAN and FlexRay systems. In this paper, a modified gateway system based on the node mapping method, the node slotting method, and the corresponding operation algorithm will be proposed. Through the modified gateway system, repeated remodifying problems are solved that is changes of information or ID during transmitting information between CAN and FlexRay systems. Additionally, improvements in the reliability and the amalgamation of the In-Vehicle Network System are shown in this paper.
Study of the Bidirectional PON Performance Based on the Optisystem
Authors: Zhao Shuang Le
Published: August 2013

This paper presents the background of PON (Passive Optical Network), introduces the powerful communication design and simulating software which named Optisystem, show the PON(Passive Optical Network) theory and structure, designs the PON fiber link which has 1310nm uplink wavelength and 1490nm downlink wavelength and then analyses the models performance. In the software, we set up a rate of 1Gbps model of PON by using the component in the Optisystem. Through calculating the model, the document gets the spectrum figure of the simulate fiber link, and analyses the parameter, such as spectrum character, Q factor, eye diagram and BER, the result verified the validity and practicable of the models design, makes the result that the initial character fiber link cant meet the demand of optical communication, so changing the transmission distance to 10 km , transmitter power to-1dBm, meeting and obtaining the basic requirements of the system performance, after that the paper comparing the coding between none return to zero (NRZ) and return to zero (RZ) encoded mode, the eye diagram analyzer component show that NRZ code is better than RZ code, in the end of the paper there is the conclusion.
Design of Intelligent Addressable Broadcast System Based on Zigbee
Authors: Wang De Sheng , Zeng Yi Fan , Wang Jing
Published: August 2013

Based on the problems of traditional broadcast system such as complexity wiring and low efficiency, this paper presents a design scheme of intelligent addressable broadcast system which takes the advantages of Zigbee and frequency modulation (FM) technologies. This system adopts a cluster topology structure with a master and numerous of broadcast nodes. The network management and system control is realized by Zigbee. The audio signal is transmitted via FM broadcast. Besides, we realized the upper computer software design based on Visual C. The practical test shows that audio quality and system efficiency are both greatly enhanced, and the broadcast system is low-cost, low-power and low-complexity.
Research on Security Communication for SDG Integrated QKD
Authors: Ma Yong Hong , Wang Xiu Yu , Cui Dan Dan
Published: August 2013

Firstly, through deeply analyzing the security threats that exist in the PON, this paper proposes a technical idea which integrates high-efficiency subcarrier multiplexed quantum key distribution into PON-SDG communication system. Secondly, we conduct theoretical calculation for the configuration parameters of PON and verify the feasibility of the technology. Finally, the concrete implementation flow-diagram and the generation process of the session key are given .The research results can provide the theoretical reference for building the secure and efficient SDG.
Modeling and Simulation of the Propagation Characteristics by Underground Current Field
Authors: Xu Yi Dong
Published: August 2013

It's one of the effective channels for short-distance wireless communications through stratum in underground mines on emergency communications. The geologic structure is complex in mines, in practical environments. It means there is a considerable difference in conductance property and channel characteristics. In order to realize effective communication through stratum, its necessary to explore and study underground signal transmission by establishing mathematical model of underground signal propagation characteristics based on the theory of constant current field and simulating the mathematical model with MATLAB. We established a simulation model of underground communication channel physics experiments and obtained the amplitude frequency characteristic of the channel, with which we can get the error comparison between theory and test.
A Grid-Based Relay Node Placement Algorithm in Wireless Sensor Networks
Authors: Wang Zhu , Lv Cui Cui , Wang Ling
Published: August 2013

The relay node placement in wireless sensor networks is usually constrained by physical factors, while most of present relay node placement approaches are unconstrained. To solve the problem, the paper presents a constrained relay node placement algorithm. Based on grid routing mechanism, the algorithm determines the grid intersections as candidates for the relay node locations, and places as fewer relay nodes as possible to assure the network connectivity. Consideration must be given to both the number of relay nodes and energy efficient, the paper uses the greedy norm and constrains to place relay nodes. By the analysis and study of the experiments, the performance of the proposed algorithm is more superior to the algorithm without constrains.
Experimental Analysis of RSSI-Based Underground Tunnel Localization with Wireless Sensor Networks
Authors: Xu Kun , Liu Da Wei , Liu Hong Li , Gu Zhi Ru
Published: August 2013

Wireless Sensor Networks (WSNs) is a self-organizing network consisting of a large number of sensor nodes interacting with the physical world. Localization of sensor nodes is an essential issue in WSNs. RSSI-based localization can be implemented conveniently, in addition this technology is cost-efficient and power-efficient in practice. However, limited attention has been paid to underground tunnels environments. In this paper, we present an experimental study of RSSI-based localization in underground tunnels. The sensor nodes used are specially designed based on a 2.4GHz low power radio chipset CC2430 for ZigBee. Experimental results confirm the applicability of RSSI-based localization in underground tunnels.
Study on Feature Modeling Based on Ontology
Authors: Liu Jia Bao , Zhou Xiao Feng
Published: August 2013

Feature-oriented domain analysis has become a more popular method for domain analysis today. However, feature model the main products of feature-oriented domain analysis method is very difficult to translate into the form of machine recognition. Moreover, it can't model detection. Feature model based on ontology can make up for these shortcomings, so this paper will study on feature modeling based on ontology. The main contents of this paper are: relationship between feature model and ontology, feature modeling framework based on ontology, the advantage and disadvantage of feature model based on ontology and general feature model.
Generating Idempotents of Cubic Residue Codes over the Field F4
Authors: Dong Xue Dong
Published: August 2013

The generating polynomials of higher power residue codes over finite fields are factors of the polynomial .Generally speaking; it is difficult to factor the polynomial over finite fields. This paper gives generating idempotents of cubic residue codes over the field .As a result, the generating polynomials of cubic residue codes over the field can be obtained by computing the greatest common divisors of these generating idempotents and the polynomial with computer software such as Matlab and Maple.
Application of Digital Factory Technology for Transmission Production Line
Authors: Wang De Quan , Li Jia Lin , Ding Jin Hua , Gao Teng , Ji Tian
Published: August 2013

In order to meet the development of economic globalization, a gearbox manufacturers need to optimize the production management through using digital factory technology to improve their market competitiveness. According a transmission production line industry characteristics and business processes, the digital factory information systems integrate ERP, MES and ANDON system making the real-time information flow. The system has been actually run in the company, passed technical appraisal and meet the design requirements.
Study on Maintenance Path Planning of Parts Based on CATIA Platform
Authors: Wu Xi Jun , Li Kai Yan , Liu Hai Long
Published: August 2013

The layout of parts is vital for a prototype, its rationality can be analyzed by generating maintenance path of removable parts. Based on the coordinate-oriented algorithm, a path-planning method for removable parts in a prototype was presented. Firstly, The entire product environment was classified into two parts of the free space and limited space. Secondly, software about maintenance path generation was produced. Lastly, the feasibility of the algorithm and software was confirmed by application in a prototype.
Modeling and Analysis of the Manufacturer Model of Remanufacturing Closed-Loop Supply Chain Under Uncertain Demand
Authors: Ma Le , Chai Yi , Lu Zheng , Zhang Ying Ying
Published: August 2013

This paper studies uncertain demand by a supplier and manufacturer two echelon remanufacturing closed-loop supply chain system model setting up and solving the problem, gets the manufacturers to control the transfer function of the z-domain expression and manufacturer System Model solving analysis.
Analysis of Fuel Properties Effects on Flame Radiation in a Gas Turbine Combustor
Authors: Wang Cheng Jun , Xin Xin , Jiang Ping , Zeng Wen
Published: August 2013

The influence of fuel properties on flame radiation transfer was investigated with numerical method under certain combustor fuel-air ratio and inlet air temperature in a gas turbine combustor. The numerical results show that the fuel properties affected the fuel pulverization quality, evaporation efficiency and combustion efficiency, which caused the flame temperature and its distribution change. Meanwhile, it has an effect on the formation and concentration distribution of soot, resulting in the changes of inner flame radiation heat flux and temperature caused by flame emitting radiation. Furthermore, the gas temperature change caused by the fuel properties more but the hydrogen content effect is relatively small, has an influence on the generation of NO which caused the change of the combustion efficiency.
Analysis of the Ground Rib Axial Profile of the Spiral Guid Roller
Authors: Gao Zuo Bin , Ma Wei , Deng Xiao Zhong
Published: August 2013

Based on the geometric and kinematic relationship between the spiral guide rollers rib and the grinding wheel in the rib grinding with the special machine, the ribs shape surface after grinding was analysised, and the equations for the ground rib axial profile were established. Numerical analysis was conducted in an example, and the results show that the ground rib axial profile is approximately linear in most region, but seriously nonlinear in the root region of about 0.5mm height, and the profile inclination direction changes when the vertical angle of grinding wheel head is less than a value which is slightly less than the helix angle of the guide roller.
Based on the Nonlinear Dynamics of Linkage Analysis of Vibration Characteristics and Control Strategy
Authors: Wu Ming Qing
Published: August 2013

Connecting rod mechanism under the condition of high speed operation, organization, the elastic dynamic response of not only makes institutions of trajectory deviation, at the same time also can cause fatigue failure, the article from the perspective of more accurate nonlinear dynamic model is established, the analysis of linkage performance and characteristics of mechanical vibration, look for the causes of various kinds of vibration, and puts forward corresponding preventive measures and control strategy.
Dynamic Simulation and Optimum Design for the Main Drive System of Reciprocating Compressor Considering Joint Friction
Authors: Xu Jin Yuan , Li Zhen , He Zhi Xian
Published: August 2013

The dynamic optimization of a main drive system in a W-type compressor with friction of joints are studied by ADAMS , a special software for dynamical simulation. First the dynamical simulating model for the system is built considering joint friction in ADAMS . The dynamic response of the crankshaft journal center and dynamic reacting forces of the two rolling bearings are obtained on rated operating condition. Also the average value of the mechanical efficiency of reciprocating compressor was revealed .Then the mathematical model for dynamic optimization is presented, its objective function is mechanical efficiency of reciprocating compressor,and the design variable are the angle of cylinder lines and the rotation speed of crankshaft.The parametric simulating model is constructed in ADAMS to search the optimum solution.The relation between the design variable and objective value is disclosed through 'DOE' ,which is a function module in the design evaluation tools of ADAMS. Numerical results are available for the dynamic design of reciprocating compressor.
Boom Buckling Instability Capability Studies
Authors: Miao Qiang , Zhang Zhong Peng , Xie Fei , Li Xin
Published: August 2013

Based on the powerful finite element analysis software-ANSYS Workbench co-simulation platform, boom buckling instability capability has been studied by using the seamless interface of DM(Geometry Modeler),Mechanical(Structure Analysis)and DX(Optimization Design)module. Firstly, the trend figure that the thickness of each plate increasing has influenced on the overall buckling limit has been got. Applying the rule, the actual structure was optimized and the optimal combination of thickness was found. Under the condition of the buckling limit, the weight of the crane arm has a significant reduction compared with the actual structure. Finally, this result which is reasonably practicably provides a reference method for engineering mechanism design including large-scale crane arm in the future.
The Study of Evolvement in Muddy Coast
Authors: Zhang Chun Hua , Chu Yu Juan , Han Xiao Qing , Gao Wei Ming
Published: August 2013

In order to study the muddy costal evolvement processing of Hebei Province in about half century, the paper extracted costal information by 3 S technology from landform maps and remote sensing images. It concluded the station of different areas in different time. Then it studied the evolvement characteristics and the reasons of muddy coast deeply. Except that, it also analyzed the evolvement infections to the nearby coast of the marine engineering. The results were show that the beach was deposited into the sea with the speed from 1 m/a to 315 m/a which were difference about 314 m/a. From 1956 to 2006 the beach was deposited into the sea with the distance of 2.8 km and the average speed of 56 m/a. The muddy coast was deposited constantly. Before 1979 the beach was evolved with slow speed about 7 m/a. However, it was deposited in a high speed. For example, it was already 82 m/a in 1987. It was even in the speed of 315 m/a from 1991 to 1993. After that, it was slow down to 50 m/a from 1993 to 1998. And it was deposited in high speed about 113 m/a in 2006.
Transferring Simulation of Pollutants in YinLuan River Open Channel under Traffic Accidents
Authors: Zhang Chun Xue , Wang Li Lin , Wang Chao , Yang Shu Yi , You Xue Yi
Published: August 2013

The water diversion project from Luanhe River to Tianjin is a large-scale project, which solved the water shortage of Tianjin city. Because the long water supply open channel along highroads, the traffic emergent incidents bring great potential dangers to the water supply of Tianjin. In this paper, the prediction model of traffic emergent incidents in YinLuan River Open Channel was built and the transferring of pollutants under typical scenes was simulated by EFDC model. The evolution and affective area of pollutant in open channel was obtained. The results provide a scientific basis for the decision makers to take effective measures.
The Design of a Portable Instrument for Straightness Measurement of Large Machine Tool
Authors: Zhang Ren , Sun Xue , Guo Xiao Yan , Chen Jie
Published: August 2013

The paper inctroduces the guide for the design of a portable instrument for straightness measurement of large machine tool. the measuring instrument is designed with two-quadrant photocell which is used as the position sensor, single-chip for the processor is MSP430F427 which have LCD driver circuit, the instrument is charged by lithium battery-powered. Its size is small, no external connection when it is used, data acquisition, processing and error displayed can be done in the part of light target. It have the advantage of convenience, simple and high measurement accuracy when it is used.
Effects of Eddy Current within Particles on the 3D Solenoid Microfluidic Detection Chip
Authors: Zhang Xing Ming , Zhang Hong Peng , Sun Yu Qing , Chen Hai Quan , Guo Li
Published: August 2013

Metal wear debris is an important component of contamination in lubrication oil, and is also an essential information carrier in hydraulic oil. Based on inductive Coulter counting principle, a microfluidic device to detect metal wear debris in oil is presented in this paper. The proposed device can make the distance between the particles in oil and the embedded induction coil very small, and hence greatly improve the sensitivity of the detection. The results indicate that eddy current within particles increase ability to detect copper particles, and decrease the sensitivity to iron particle.
Geo-Acoustic Parameters Inversion from Vertical Coherence Characteristic of Ambient Noise
Authors: Meng Chun Xia , Li Gui Juan , Zhang Liang
Published: August 2013

In shallow sea the wave of ambient noise contains the information of environment acoustic field. In theory, vertical coherence, which is one of the numerous ambient noise field characters, can be used to invert geo-acoustic parameters because of its relative stability. The ambient noise data were collected in two different seasons using two vertical-laid hydrophones in shallow water. Then acoustic parameters of semi-infinite space seabed are inversed from the vertical coherence of measured ambient noise in the frequency range of 100Hz~3 kHz. The predicted vertical coherence curve of ambient noise, which is computed using inversed parameters, agrees with the measured curve by comparison. The experiment results show that geo-acoustic parameters can be inversed effectively by the vertical coherence of ambient noise.
The Research of Full Digital Beneficiation Metal Detector
Authors: Li Duan Duan , Hao Cheng , Cui Ce
Published: August 2013

Due to the influence of interference signals, such as the electromagnetic interference, noise interference, temperature drift, and so on. The traditionally used metal detectors have the shortcomings of the inaccuracy and poor anti-interference ability. This paper is based on analyzing the principles and characteristics of traditionally used metal detectors, presents a new full digital beneficiation metal detector, which using MSP430 MCU as the core, the FFT algorithm is employed successfully to analyze the induction signals that collected when the metal through the induction coil, gets the amplitude-frequency and phase frequency characteristics, determines whether metal impurities through the coil by the characteristics of cross-correlation function. In the end, achieves good harmonization between sensibility and reliability.
Assessing Coronary Arterial Dynamics from Cineangiograms
Authors: Sun Zheng , Gao Qi Xiang
Published: August 2013

Assessing displacement fields of coronary arterial skeletons from a pair of nearly orthogonal cineangiographic image sequences is addressed. Projections of vessel skeletons are firstly extracted from each frame. Then, 2D displacement vectors of vessel skeletons during each temporal interval are estimated along the image sequences. 3D displacement vectors of each skeleton point are finally reconstructed along the overall sequences. Possible errors are discussed. Experimental results with clinically acquired in vivo image data have demonstrated the validity of the method.
Design of Monitor System for JD15 Electro-Hydraulic Controlling Drill Rig
Authors: Song Hai Yan , Chen Ji Tao , Sun Wei Li , Li Yuan Yuan
Published: August 2013

Electro-hydraulic controlling drill rig has played a very important role nowadays in drilling program. The design of monitor system for JD15 electro-hydraulic controlling drill rig, and the functional requirements of different parts, including real time data acquisition, processing and output, real-time monitoring and display of parameters, have been studied according to the actual demand of monitor system, and additionally, the design puts forward relevant thoughts about the system in the way of computer software and hardware.
Design and Research on Micro Axial-Flux Electromagnetic Generator
Authors: Wu Tao , Fan Ning Jun , Wu Yan Xuan
Published: August 2013

This paper reports on the design and research on the micro generator. A micro axial-flux electromagnetic generator is designed as size of Φ6mm×3mm. The formulas for air density and induced Electromotive Force (EMF) were given by a magnetic circuit analysis and main design parameters of the micro generator were determined. Numerical simulation was used to analyzed the induced EMF, when the rotation speed is 10kr/min, the induce EMF in one phase is 12.57 mV; the sum of output power is 296.07μW. The results suggest that the micro generator has an ideal output, which means that the generator may be used in micro systems as the power sources.
A New Hybrid Excited Magnetic Levitation Feeding Platform
Authors: Yang Hong Bing , Yu Si Jia , Yang Ren Jie , Dai Yue Hong , Tang Chuan Sheng
Published: August 2013

Frictional resistance is an inherent problem to traditional feeding platforms of NC machine tools, while magnetic levitation is a good solution. The structure and operating principle of a magnetic levitation feeding platform based on the hybrid excited linear synchronous motor are proposed, and the FEA to the electromagnetic force and normal force of the motor is launched using Maxwell2D. To the problem of force ripple two optimization methods are adopted by simulating to prove the feasibilities of the direct driving by hybrid excited linear synchronous motors and the frictionless feeding of NC machine tools.
Analysis for Operation Control System Based on IDEF Method
Authors: Zhou Kun Lin , Li Qi Qiang , Guo Rong Sheng
Published: August 2013

The optimal operation of the process is achieved as a whole by analyzing the hierarchical control system for industrial process operation based on IDEF method. A loop setting controller is projected for the generalized object consisting of the controlled process and the lower-level control system by using the IDEF method. According to the desired technical indices, the loop setting controller is able to automatically adjusts the set points for the lower-level controllers from top to bottom, meet the requirements of operation control for the production process, ensure the quality of products and stable operation of the production process.