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23,675 Article Results

A Switched IMM Estimator Based on the Model Probability Cumulant

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2530
Guang-Nan Zhang , Jin-Long Yang
Taking into account the disadvantage of the potential loss of accuracy due to the overmodeling at these nonmaneuvering times in the interacting multiple model (IMM) method, an improved IMM algorithm based on the Viterbi technique and the model probability cumulant is proposed. First, select one or two optimal models from the model set to enhance the model utilization rate. Then, judge the variation of the target motion state according to the maneuvering detection mechanism based on the model probability cumulant, and finally switch the different IMM methods. Simulation results show that the proposed method has an enhanced performance in tracking a maneuvering target. DOI:http://dx.doi.org/10.11591/telkomnika.v11i8.3089
Volume: 11
Issue: 8
Page: 4633-4638
Publish at: 2013-08-01

Intelligent Search Technology Combining Semantic Grid and Clustering

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2554
Cuncun Wei
It is a critical problem of P2P network about how to efficiently and accurately search resources on P2P network. This thesis mainly starts from improving query efficiency to establish an intelligent search framework. On the basis of Gnutella-flooding search technology, it applies theories of semantic ontology search combined with semantic hash routing table technology and searches accurate answer from the resource library through problem traversal query in the network and node provided in the routing table. Meanwhile, in view of the flaws of the current structuralized and non-structuralized P2P network, it applies a hierarchical clustering method to form a hierarchical semantic web through semantic clustering in the node, domain clustering and global clustering, etc. Experiment shows that this framework could well improve search, query efficiency and fault tolerance in P2P environment, extend and understand user query demands and reach the aim of accurate search. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3143 
Volume: 11
Issue: 8
Page: 4803-4809
Publish at: 2013-08-01

Zigbee Technology in Intelligent Electric Leakage Protection System Applied Research

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2485
Deng Lei-lei , Zhang Xian
Aiming at inconvenient wiring and low flexibility of current wired sensor network,An implementation method for real-time monitoring system based on ZigBee wireless network is proposed in this paper. in view of existing selective earth leakage protection device of low sensitivity, poor reliability problems, proposed one kind based on the zero sequence current feature selectionSelective leakage protection and line selection method; analysis of power supply system leakage fault branch of zero-sequence current logical relations, introduced based on the zero sequence current featuresVolume selective leakage protection principle and the realization method of fault line selection.As a Zigbee wireless sensor technology, Its application to the grid. Analyze leakage protection system in relation to the past system of superior performance and favorable conditions, And its features and system design of a simple program to explain the analysis and application of specific measures. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3027 
Volume: 11
Issue: 8
Page: 4291-4295
Publish at: 2013-08-01

An Optimized Iteration Algorithm based on C-V model and Graph Cuts

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2493
Hong Lan , Lequan Min
C-V model can self-adapt to the changes of curve topology but requires more iterations and needs more computing time. Graph cuts algorithm is good at getting the global optimum in a short time but not suitable for concave object extraction.To overcome the flaws of these two algorithms, an optimized iteration algorithm has been proposed. First the initial contour is deformed with an improved C-V model, which was without re-initialization during iterative process and the iteration stop condition is set by calculating changing area within the contour. Then the active contour is input to graph cuts algorithm. Dilates the contour into its neighborhood and formed an inner and an outer boundary seperatively, changes these two boundaries as source and sink, and obtains the final contour by graph cuts. Experiments show that this optimized algorithm reduces the iteration time, and has better effect and higher efficiency for image segmentation. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3035 
Volume: 11
Issue: 8
Page: 4357-4366
Publish at: 2013-08-01

A New Regularity to Generate High-Dimensional Hyperchaotic System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2525
Jianming Liu
The chaotic system plays an important role in information communication, electrical equipment, computer cryptography and so on. In this paper, four new high-dimensional complex hyperchaotic systems are found. A new overlaying regularity to generate a new high-dimensional complex hyperchaotic system is found by overlaying a series of low-dimensional chaotic system with the Duffing chaotic system. The regularity to generate high-dimensional complex hyperchaotic system is analyzed. The features of chase space maps and Lyapunov exponents’ maps are analyzed. The results of theoretical analysis and experiment show that new systems having strong chaotic features. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3084
Volume: 11
Issue: 8
Page: 4594-4601
Publish at: 2013-08-01

Predictive Function Control for Milling Process

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2500
Zhihuan Zhang , Chao Hu
The adaptive constant control for the cutting process is an effective way to improve the productivity of the Computer Numerical Control (CNC) milling machine. This control is achieved through adjusting the feed rate online, and many scholars has been concentrated in the field. However, in of the existing adaptive constant control algorithms, the controller parameters are tuned only depends on the dynamic behavior of the controlled system, without giving effect to control the input and system output prospects. Therefore, milling force mutated because of the mutation of the depth or width of cut usually resulting in the overshooting of control system or overflow of control input. In this paper, we present a new solution to the problem, in which a mathematical model of milling process is established based on the characteristics of the CNC milling process. Then the predictive functional control law is introduced on the milling process and the controller parameters can be tuned online. The Simulation results show that the proposed method has the advantages of strong robustness to different interferences, good practicability for the milling process, and good real-time control responsibility. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3042  
Volume: 11
Issue: 8
Page: 4407-4413
Publish at: 2013-08-01

Application of Computer Software in Analyzing Sound Acquisition in Modern Standard Chinese

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2557
Huaying Chen , Huaizhou Mao
E-Prime is a suite of applications to fulfill researchers’ computerized experiment needs. Praat is a free software program for the analysis of speech in phonetics with which phoneticians can analyze, synthesize, and manipulate speech. SPSS is a software program which can be used for doing statistical analysis of the collected data. These computer software programs are applied in the present study which aims to explore the consonant acquisition of Putonghua (Modern Standard Chinese) by native speakers of Uyghur. The difficulty hierarchy of the Chinese consonants for the Uyghur learners of Chinese is found out through the perception experiment. The results of the experiment support the Markedness Differential Hypothesis. In addition, it shows that the second language speech acquisition is influenced by both the first and also the target language phonological system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3146 
Volume: 11
Issue: 8
Page: 4824-4831
Publish at: 2013-08-01

A Novel Low Noise High Gain CMOS Instrumentation Amplifier for Biomedical Applications

https://ijece.iaescore.com/index.php/IJECE/article/view/5444
Akshay Goel , Gurmohan Singh
This work describes a novel technique of designing a low noise high gain CMOS instrumentation amplifier for biomedical applications. A three op-amp instrumentation amplifier have been designed by employing two simple op-amps at the two inputs and a folded cascode op-amp at the output. Both input and output stage op-amps are 2-stage. Most of the earlier designed op-amp in literature uses same type of op-amp at the input and output stages of instrumentation amplifier. By using folded cascode two stage op-amp at the output, we have achieved significant improvement in gain and CMRR. Transistors sizing plays a vital role in achieving high gain and CMRR. To achieve a desirable gain, common mode rejection ratio and other performance metrics, selection of most appropriate op-amp circuit topologies & optimum transistor sizing was the main criteria for design of instrumentation amplifier for biomedical applications. The instrumentation amplifier is simulated using Cadence Spectre tool and layout is designed in Cadence Layout editor at 0.18µm CMOS technology. Each of the input op-amp provides a gain and CMRR of 45dB and 72dB respectively. The output stage folded cascode amplifier provides a gain of 82dB and a CMRR of 92dB. The design achieves an overall gain and CMRR of 67dB and 92db respectively. The designed instrumentation amplifier consumes only 263µW of power suitable for biomedical signal processing applications.DOI:http://dx.doi.org/10.11591/ijece.v3i4.3170
Volume: 3
Issue: 4
Page: 516-523
Publish at: 2013-08-01

Prediction of Electric Power Consumption Based on the Improved GM(1, 1)

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2536
Zhengren Wu , Mei Liu , Xin Wang
Based on the electric power consumption data in 2001-2010, this paper discusses GM (1, 1) model and its improved model in the application of power consumption forecasting. Due to the traditional Grey Model itself has certain defects, we grouped the original sequence according to the degree of deviation first, and then combined with nonlinear GM (1, 1, α) to improve the traditional GM (1, 1) model. Through the relative error testing and the posterior testing, this paper made a comparative analysis to the traditional GM (1, 1) model and the improved GM. Example of Beijing shows that the improved model had good accuracy; it had a good application value in the actual prediction system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3104
Volume: 11
Issue: 8
Page: 4669-4675
Publish at: 2013-08-01

Virtual Training System for Hydraulic Pump Cart Based on Virtual Reality

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2484
Wusha Huang , Qiang Chen , Minzhuo Wang , Haonan Ye
This paper dissertates the application of Virtual Reality Technology in the training process. Virtual training system has more advantages than traditional training system. The design of virtual training system based on PTC DIVISION Mockup software, position tracker and 3-D mouse is proposed. The system is divided into two parts: directing part and operating part. Collision detection is discussed to improve the sense of reality in the virtual environment .This system is applied to the training process of hydraulic pump cart’s assembly and disassembly. More immersive training effect is obtained in this system. The goal of reducing training costs and improving the efficiency of training can be achieved in the virtual training system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3026 
Volume: 11
Issue: 8
Page: 4282-4290
Publish at: 2013-08-01

High-Dimensional Chaotic System and Its Circuit Simulation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2517
Jianming Liu
The chaotic system plays an important role in electronic and electrical equipment, computer cryptography, computer communication and so on. In this paper, we established three new six-dimensional complex chaotic systems and one new ten-dimensional complex chaotic system. The regularity to generate high-dimensional chaotic system is also found by overlaying a series of low-dimensional chaotic systems with Duffing chaotic system. The circiuts of the new high-dimensional complex chaotic system are designed. The simulation experiments of the high-dimensional complex chaotic circuits are tested. The results of theoretical analysis and experiment show that new high-dimensional complex chaotic systems and their circiuts have the hyperchaotic characteristics. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3076 
Volume: 11
Issue: 8
Page: 4530-4538
Publish at: 2013-08-01

Controller of Dynamic Reactive Power Compensation Based on FPGA

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2516
Zhao Ming , Tan Bo , Zhang Shuangfeng
Thyristor switched capacitor (TSC) is a commonly used method of compensation of reactive power on the grid, but problems are that the compensator responses slowly and real-time tracking capability is poor. So software and hardware are developed. The fuzzy-PI controller is adopted to control TSC. And this controller is embedded in the field programmable gate array (FPGA), which can take advantage of FPGA (Field Programmable Gate Array). The detailed analysis is given. Simulation and field test show that the design improves speed, reliability and stability of the controller. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3077
Volume: 11
Issue: 8
Page: 4523-4529
Publish at: 2013-08-01

A Conflict Context Reasoning Method Based on Dempster-Shafer Theory in Ubiquitous Computing

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2548
Xinkai Yang
In this paper, one conflict context reasoning method based on Dempster-Shafer theory is proposed. Firstly the context conflict problems are illustrated and partitioned based on theory of evidence. Then the context model combined with Dempster-Shafer theory is presented and applied to the reasoning method based on Dempster rule of combination. The effectiveness of this method is verified with a RFID application example. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3136
Volume: 11
Issue: 8
Page: 4757-4765
Publish at: 2013-08-01

Research on coordinate transformation of the three-phase circuit

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2476
Tian Ming Xing , yan hong , Yuan Dong Sheng
The different three-phase circuit coordinate transformation matrixes are given in relevant literatures , which may cause some difficulties to understand and apply the coordinate transformation. The paper presents a general expression of the coordinate transformation matrixes in three-phase circuit and points out that the coordinate transformation matrixes having different specific expressions are due to existing the parameters which can be selected in the general expression. On this basis, the three often used expressions of coordinate transformation matrixes rotating at arbitrary speed are obtained through selecting these different parameters, which are Park transformation, orthogonal transformation and the coordinate transformation in the theory of instantaneous power. The paper further points out that, through particularly choosing coordinate rotation speed ,it can get commonly used special coordinate transformation matrixes between the three-phase stationary coordinate systems, and between the stationary coordinate system and synchronous rotating coordinate system by matrix general expression. The work of this paper shows that the three-phase circuit coordinate transformation matrixes are essentially uniformed, though their forms and practical applications are different, which is helpful to further understanding and correctly using the coordinate transformation theory of three-phase circuit. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.2268
Volume: 11
Issue: 8
Page: 4222-4228
Publish at: 2013-08-01

Game Analysis between Government and Coal Mine Enterprise in Coal Resource Exploitation Environmental Impact Compensation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2540
MENG Zhao-jian
From the angle of compensation subject and compensation object, the interest involved with stakeholder was analyzed. Based on game theory, the relation between government and coal mine enterprise was analyzed. Through the research, the government should constraint the coal mine enterprise behavior, set up coal resources development environmental impact compensation incentive mechanism, increase coal resources exploitation and environmental compensation violations punishment, and incentive the coal mining enterprises. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3128
Volume: 11
Issue: 8
Page: 4698-4704
Publish at: 2013-08-01
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