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ISSN 1674-2850
CN 11-9150/N5
 
Current Issue
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August 30,2015
Volume 8,Issue 16
Pages -
Subject Area:Control Theory,Artificial Intelligence,Computer Processor Technology,Computer Software,Computer Network,Computer Applications
 
Title: Application of fiber grating dynamometry bolt in coal mine tunnel surrounding rock monitoring
Authors: LÜ Chuangxin, KAN Jiaguang, MA Yajun, ZHANG Wende
PP: 1750-1760
Abstract: According to the conveyer gate roadway project of 1111(1) working face in Zhuji coal mine, layout in the fiber grating sensor bolt, the installation and adjustment steps for surrounding rock monitoring and control system were proposed. Working principle of the monitoring and control system were analyzed, and the distribution and changing trend of bolt stress field and surrounding rock temperature field were summarized. Results show that the distribution of bolt stress is characterized by heterogeneity, volatility and diversity. The initial roof bolt stress distribution curve can be divided into three types, which are the increasing curve, decreasing curve and waving curve, respectively. Among the three, the increasing curve shows a desirable bearing behavior. Bending moment exists in partial bolts. Stress in different parts of bolt increases with the growth of mining disturbance. The temperature of surrounding rock decreases with the increase of the distance to surrounding wall. The temperature of the shallow rock changes significantly over time, showing a feature of first decreasing rapidly and then tending to be stable.
Keywords: other subjects of basic subject of information science and system science; fiber grating sensor; tunnel surrounding rock monitoring system; bolt stress field; surrounding rock temperature field
 
Title: Application of dynamic Bayesian networks in strategic-level wargame
Authors: LI Huiming, LI Dehua
PP: 1744-1749
Abstract: Based on the demand of the international strategic-level wargame system, dynamic Bayesian networks (DBN) applied to situation and threat assessment were analyzed and established in this paper. Bayesian networks (BN) model of situation and threat assessment were constructed firstly, by adding the time factor to accumulate information and reducing the complexity of the networks to satisfy the Markovian property, internal invariant and stationarity, and then transformed into DBN. The Bayesian inference software Netica was used in the simulation experiments. Results show that DBN is more efficient and reliable for strategic-level wargame than BN.
Keywords: other subjects of basic subject of information science and system science; situation and threat assessment; dynamic Bayesian networks; strategic-level wargame
 
Title: Design control rules for the angle adjustment of gate leaves in the SCR denitration system of marine diesel engines based on CFD simulations
Authors: LIANG Xunquan, XU Yuanyuan, LIU Shuangshuang, MEN Xiuyan
PP: 1737-1743
Abstract: Using the marine diesel engine (MAN 6S50MC-C) as the research object, the flow mechanism model of selective catalytic reduction denitration (SCR-DeNOx) was established based on computational fluid dynamics (CFD) simulations. 3D computational fluid dynamics simulations of the model were carried out. The influence of the gate leaves on gas velocity distribution on the surface of the first catalyst layer was investigated. Control rules of gate leaves were built based on data analysis for the variable working conditions of marine diesel engines.
Keywords: systems engineering methodology; computational fluid dynamics; marine diesel engine; selective catalytic reduction denitration; gate leaves; control rules of angle
 
Title: Small signal modeling of variable frequency power supply based on averaged switch model
Authors: QIAO Zhiyong, PENG Renming, XU Xuntao, HE Yanshan
PP: 1730-1736
Abstract: Three phase digital variable frequency power supply is a nonlinear control system. In order to make the three-phase inverter power supply reach the target requirements of precision control. In this paper, we build a small signal dynamic modeling for variable frequency power supply using the averaged switch model, which provides the basis of calculation for the design of variable frequency power supply system controller and the compensation network. The averaged switch model is a modeling method for linear AC small signal model which is obtained through the circuit transformation. It has the advantages of visual and convenient. Small signal model of three-phase BOOST converter and PWM inverter is established by this method. By using the mathematics model and better meet the requirements of control precision.
Keywords: system modeling; small signal modeling of variable-frequency-power-supply; averaged switch model; BOOST converter model; inverter model
 
Title: Backstepping sliding mode controller for flight attitude of quadrotor unmanned aerial vehicle
Authors: LAN Yipeng, XUE Weilin
PP: 1725-1729
Abstract: A nonlinear adapative backstepping sliding control was proposed for the attitude of quadrotor unmanned aerial vehicle. We built a nonlinear mathematical model for it. In order to realize the accurate tracking and robust performance of the attitude tracking, a backstepping sliding mode controller was derived by combing the backstepping and sliding mode control. Simulation experiments with sine moment disturbance were carried out, which showed that the proposed controller could well control the attitude of quadrotor unmanned aerial vehicle.
Keywords: control theory; quadrotor; attitude control; backstepping sliding control
 
Title: Application of differential algebraic estimation in anaerobic digestion process
Authors: ZHAO Yongguo, WANG Haoping, TIAN Yang, IVAN Simeonov
PP: 1715-1724
Abstract: For problems which unknown variables and unknown states in the anaerobic digestion process cannot be measured online, this paper presents the differential algebraic estimation algorithm. Based on this algorithm, the use of the information can be measured online in anaerobic digestion process, and we can estimate the information that cannot be measured in 5th order Barth-Hill nonlinear model, including acidogenic bacteria growth rate, methanogenic bacteria growth rate, acidogenic bacteria concentration as well as methanogenic bacteria concentration. Then the effectiveness of the proposed method in actual production process is validated via Matlab/Simulink.
Keywords: control theory; anaerobic digestion; differential algebraic estimation; unknown variable; parameter estimation
 
Title: Design and application of personalized recommendation system based on employment information service
Authors: PAN Hao, ZHENG Miao, YANG Jun
PP: 1709-1714
Abstract: In this paper, employment information data is used to propose a rating model which turns users’ history behavior on job positions into users’ interest. This model divides users’ behavior into three types: click, collect and apply, and integrate time when users’ behavior happened into similarity calculating. For the use of time context, a time reduction strategy is used. Based on this data model, a user-based collaborative filtering recommendation system is implemented and its effectiveness is tested.
Keywords: artificial intelligence; recommendation system; collaborative filtering; time context
 
Title: Implementation of test access mechanism for SoCs
Authors: JING Gu, BAI Yinping
PP: 1702-1708
Abstract: Based on the SoC d695 in ITC’02 benchmark circuits, the hierarchical structure model of SoCs testing system chips was established. Using hardware and software co-design idea to design and optimize the test structure model, we designed the corresponding multi-level test access mechanism and proposed a testing strategy of grouped SoCs flexible bandwidth test access mechanism (TAM). In the test of scheduling control, macro-control module was adopted. In order to increase the flexibility of the test, improve test efficiency and save testing time, the hierarchical test structure of SoCs was used as parallel test, which had great practical significance for testable realization of increasing complex hierarchical SoCs and optimization study.
Keywords: computer processor technology; SoCs test structure; parallel test access mechanism; test stragy; Wrapper design
 
Title: Design and research on management of 3D server room data storage platform based on Hadoop
Authors: XIONG Shiyong, LI Qinhan
PP: 1696-1701
Abstract: 3D sever room management system requires managing and real-time processing massive data informaton. To deal with the problem of data storage, data security and deployment cost, a plan using the distributed computing technology based on Linux clustering Hadoop as foundation, combining HDFS, Hbase and MySQL database was presented to store and manage the massive 3D storage room data. Experimental results show that the system can ensure the data storage safety and reliability with easy maintenance and good scalability and can effectively meet the demands of the real-time data processing.
Keywords: computer software; distributed database; 3D server room; Hadoop; big data storage; combined storage
 
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Title: Research on optimization of SIP fuzzy test suite
Authors: WANG Yujiao, SHUANG Kai
PP: 1681-1687
Abstract: This paper presents an optimization method in order to improve the test cases used in fuzzy test by evaluating the effect of test cases. More targeted test sets are genetated by abstracting the characteristics of the test cases. The method is proved to effectively reduce the number of test cases, and improve the test results and the efficiency of fuzzy test.
Keywords: computer applications; SIP; fuzzy test; malformed message; effect evaluation; IP multimedia subsystem
 
Title: Forwarding mechanism in opportunistic network based on information availability
Authors: WU Jia, CHEN Zhigang, GUAN Peiyuan, GUO Lin
PP: 1675-1680
Abstract: Through the classification of social relations and the analysis of the available information, a strategy based on the calculation of information usability is proposed to expand the information transmission path and control the information transport of the nodes by setting the threshold value. Simulation experiment results show that the routing overhead is reduced compared with the classical algorithm, which has significantly improved in performance.
Keywords: computer applications; opportunistic network; information availability; threshold value; routing overhead; social relations
 
Title: Research and improvement of Web application framework for agile development
Authors: HAO Qing, XU Peng
PP: 1666-1674
Abstract: In this paper, J2EE development framework was studied, including Struts, Spring and Hibernate. According to the actual project development experience, the general development framework was improved, which not only had the characteristics of general development framework while joined the commonly used components and development of the template. The framework could simplify the development of the repeated work, fit agile development process better.
Keywords: computer applications; Web application; development framework; J2EE; agile development; development template
 
Title: Research of data fusion estimation algorithm on mine wireless sensor networks
Authors: BAO Yu, WANG Yuanping, MIAO Xiexing, ZHANG Yanqun
PP: 1655-1665
Abstract: We summarized statistical estimation method for data fusion in wireless sensor networks (WSN). Aiming at characteristics of wireless sensor network for mine, we summarized and expanded the basic model of data fusion and reviewed the main methods of data fusion. At last, we discussed the trend and challenge of the development of the technology at present.
Keywords: other subjects of computer applications; wireless sensor networks; review; mine internet of things; data fusion estimation algorithm