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INDONESIA
Indonesian Journal of Electrical Engineering and Computer Science
Published by Institute of Advanced Engineering and Science
ISSN : 25024752     EISSN : 25024760     DOI : -
Core Subject :
Arjuna Subject : -
Articles 90 Documents
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Search results for , issue "Vol 11, No 8: August 2013" : 90 Documents clear
An Algorithm on Generating Lattice Based on Layered Concept Lattice Zhang Chang-sheng; Ruan Jing; Huang Hai-long; Li Long-chang; Yang Bing-ru
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Concept lattice is an effective tool for data analysis and rule extraction, a bottleneck factor on impacting the applications of concept lattice is how to generate lattice efficiently. In this paper, an algorithm LCLG on generating lattice in batch processing based on layered concept lattice is developed, this algorithm is based on layered concept lattice, the lattice is generated downward layer by layer through concept nodes and provisional nodes in current layer; the concept nodes are found parent-child relationships upward layer by layer, then the Hasse diagram of inter-layer connection is generated; in the generated process of the lattice nodes in each layer, we do the pruning operations dynamically according to relevant properties, and delete some unnecessary nodes, such that the generating speed is improved greatly; the experimental results demonstrate that the proposed algorithm has good performance. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3063
A New Regularity to Generate High-Dimensional Hyperchaotic System Jianming Liu
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

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
Demonstration Technology Application and Analysis on the Scientific and Technological Progress Qingzhu Qi; Zhixiao Jiang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper takes Tianjin for example and analyzes the development tend of scientific and technological progress in Tianjin. From five aspects as ‘environment of scientific and technological progress’, ‘input of scientific and technological activities’, ‘output of scientific and technological activities’, ‘high-tech industrialization’, ‘science and technology for economic and social development’, the paper analysis the correlation between GDP and scientific and technological progress. Research finding shows that these five indicators are all positive correlated with the GDP, and especially ‘environment of scientific and technological progress’, ‘input of scientific and technological activities’, and ‘science and technology for economic and social development’, which are significantly positive correlation of GDP. The extent to which these five indicators impact the GDP from strong to weak is ‘input of scientific and technological activities’, ‘science and technology for economic and social development’, ‘environment of scientific and technological progress’, ‘high-tech industrialization’, and ‘output of scientific and technological activities’. The ‘input of scientific and technological activities’ index (2011) in Tianjin scores only 70 which ranks fourth among the five indexes, however its impact on GDP is most significant. So it would be best for Tianjin to increase the human and financial input in ‘scientific and technological activities’ to promote the growth of GDP in future. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3129 
A Framework For Concept Drifting P2P Traffic Identification Guanghui Yan; Minghao Ai
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Identification of network traffic using port-based or payload-based analysis is becoming increasing difficult with many Peer-to-Peer (P2P) application using dynamic ports, masquerading techniques, and encryption to avoid detection. To overcome this problem, several machine learning technique were proposed to classify P2P traffics. But in the real P2P network environment, new communities of peers often attend and old communities of peers often leave. It requires the identification methods to be capable of coping with concept drift, and updating the model incrementally. In this paper, we present a concept-adapting algorithm CluMC which is based on streaming data mining techniques to identify P2P applications in Internet traffic. The CluMC use micro-cluster structures which contain potential micro-cluster structures and outlier micro-cluster structures to classify the P2P traffic and discover the concept drift with limited memory. Our performance study over a number of real data sets that we captured at a main gateway router demonstrates the effectiveness and efficiency of our method. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3030
Voltage and Reactive Power Control of Front-end Speed Controlled Wind Turbine via H∞ Strategy Haiying Dong; Shuaibing Li; Lixin Cao; Hongwei Li
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

According to the characteristics like rapidity, time variability and the uncertainty of the input mechanical torque of the front-end speed control wind turbine (FSCWT) with directly grid-connected electrically excited synchronous generator (EESG), a double-loop H∞control approach was proposed. In which, a simpilified structure of brushless excitation system was used. For the inner loop, first H∞excitation controller was designed for realizing a fast excitation control; the second H∞power system stabilizer (PSS) was designed by solving the Riccati equation for the purpose of eliminating the oscillation and desynchronization of generator may caused by fast excitation and improving the system transient stability, which ensured the generator with stable operation in grid-connecting and effectively solved the contradiction between fast excitation and transient stability. Then the designed H∞controllers were applied to the voltage and reactive power control system (VRCS), which realized the output voltage and reactive power control requriements by tuning the weighting functions. Simulation results show that the double-loop H∞control approach was more effective than the single H∞excitation control in voltage and reactive power control of FSCWT. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.2423
Grounding Resistance Measurement of Transmission Towers in Mountainous Area Xueling ZHU; Juan ZHANG; Zeng PING; Jia LIU
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Due to limitations of 0.618 pole method, the triangle method and the champ ground resistance tester method on grounding resistance measurement of transmission lines and towers under conditions of complex landscape in a mountainous area, it adopts a generalized three-electrode grounding resistance measurement method which arranges electrode flexibly in the grounding resistance measurement of transmission lines and towers under conditions of complex landscape in a mountainous area, and the measurement results of the generalized three-electrode grounding resistance measurement method compares with the measurement results of the 0.618 pole method and the triangle method. Research results show that the tower grounding resistance measurement method based on the generalized three-electrode method is correct and feasible in engineering and it supplies a new method for the overhead transmission line and tower grounding resistance measurement under conditions of complex landscape in a mountainous area. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3046
A Method of Discovering Tolerance Markov Blanket Based on Completely Dependent Unknown Components Hongzhou He; Mingtian Zhou
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

A novel tolerance feature subset selection method from incomplete data set, denoted by MaxG-IIAMB, is proposed to pick out the Markov-boundary (MB), the minimal subset of features, of target variable but without making any assumption about the unknown component distribution. The classification experimental results of risk factors observed in a sample of 1841 employees of a Czech car factory demonstrate the practicability and superiority of our method over the classical expectation-maximization (EM) and available case technique (ACA). DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3079
Prediction of Electric Power Consumption Based on the Improved GM(1, 1) Zhengren Wu; Mei Liu; Xin Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

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
Design and Implementation of the Application Layer Communication Protocol based on Wireless Sensor Network Changshun Chen
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The user-defined communication protocol is the key step to develop application system based on Wireless Sensor Network. Through the analysis on the application of the wireless sensor network architecture and communication needs, a kind of simple and practical application layer communication protocol with detailed design of protocol data structure is proposed in this paper. Based on that, a communication protocol programming prototype is written in C# language. Through the test of wireless sensor network intelligent community monitoring system, it proves that the system data transmission based on this proposal is reliable and programming is simple and convenient. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3141
Backstepping Adaptive Fuzzy Scheme for SCARA GRB400 Robot Wei Yong Qiao
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 8: August 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In order to achieve the accurate trajectory tracking of 2 degree-of –freedom robot, a backstepping adaptive fuzzy control scheme based on Lyapunov method, is presented for the SCARA (Selective Compliance Assembly Robot Arm) robot system. The control strategy consists of the traditional backstepping control and adaptive fuzzy control to cope with the model unknown and parameter disturbances. The system is modeled using the MATLAB-SIMULINK toolbox. The simulation is presented to verify the effectiveness of the proposed control scheme. From the simulation results, fast response, strong robustness, good disturbance rejection capability and good angle tracking capability can be obtained. The output tracking error between the actual position output and the desired position output can asymptotically converge to zero. It is also revealed from simulation results that the proposed control strategy is valid and effective for the SCARA robot system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.2634

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