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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 85 Documents
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Search results for , issue "Vol 11, No 7: July 2013" : 85 Documents clear
Performance Optimization based Spectrum Analysis on OFRA and EDFA Devices Liu Liying; Ma Yu; Yang Jiuru
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

As the key devices, erbium doped fiber amplifier (EDFA) and optical Raman fiber amplifier (OFRA) have been widely applied in the fields of optical communication, sensing and measurement. However, the performance optimization is always one of the hot topics in the study of optical fiber amplifiers, because its output characteristics are hardly dependent to the key designing parameters. In this paper, in order to cope with such problem, we adopt the novel analysis based spectrum to study the output performance of EDFA and OFRA systems, respectively. Through simulating the operation of the two amplifying system, their output characteristics are first demonstrated with the various parameters. And according to the numerical results obtained, the key designing parameters of EDFA and OFRA systems are determinate, and the performance of amplifying systems are improved and optimized obviously in terms of output power, signal noise ratio, and the level of gain flatness. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2822 Keywords: Fiber Raman Amplifier, Erbium Doped Fiber Amplifier, Performance optimization, Spectrum analysis, Simulation. 
The Study of Selection of Coal-Fired Supplier in Thermal Power Enterprise Based on the Extension Analysis Method Tiejun Ci; Xiyang Liu
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Electric power market competition is intense. The competition between the various power plants will is the contest of economic efficiency as the core. Fuel cost is the center link of production management and economic accounting in thermal power plant, so selection management of the coal-fired supplier has great significance for the development of thermal power enterprise and improvement of the economic benefits. The paper constructs evaluation index system of coal-fired supplier, using the AHP method to determine the weight of evaluation index, and comprehensively evaluating to the coal-fired supplier with correlation functions in the extenics. The result indicates that it applies combination of the AHP and the extension analysis method to the selection of coal-fired supplier, which can accurately reflect relative importance of evaluation index, and directly reflect the detailed situation of supplier. This method is scientific, reliable and practical, which is applicable for various comprehensive evaluations. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2837 
Study on China’s Electronic Information Industrial Agglomeration and Regional Industrial Competitiveness Xuan Zhaohui; Wu Aizhi; Lv Yongbo
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Spatial agglomeration and industrial competitiveness are currently two key issues in the study of China’s electronic information industrial development. Based on the data for 1995 - 2010, this paper establishes the indicator system to evaluate the competitiveness of regional electronic information industry. In this paper, location Gini coefficient and the indicator of concentration rate are applied to analyze the characteristics and historical evolution of China’s electronic information industrial agglomeration, while benchmarking analysis is also applied to evaluate the competitiveness of provincial regional electronic information industry. The correlation between industrial agglomeration and industrial competitiveness is analyzed in this study. There is a significant positive correlation between them at present. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2854 
Research on Measurement System of High-Frequency Parameters for Line Traps Wensi Cao; Chuanjin Huang; Guozhi Zhang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The composing of high frequency line trap of power system is briefly introduced, A new method based on improved voltage meter method is presented, which can measure the frequency-impedance characteristic of the line trap of power system. A new testing arithmetic is presented based on the correlation principle, Cross-correlation functions of the two measured signals are directly computed and some properties about correlation and sine function are adopted to separate the useful signals from the part noises，so the measurement accuracy is improved, A group of practical formulas for calculating the impedance and resistive component is summarized ,the MATLAB simulation of the arithmetic is presented . Using DSP chip TMS320LF2407 and A/D chip THS12082 as the core of the measurement system, its software and hardware are designed. Analyze the Given K-type broadband tuning traps which has typical parameters. Experimental results and theoretical analysis demonstrate the measurement system can obtain a precision of better than 1％ and has a good ability of anti-jamming DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2933
The Color Extraction and Support Vector Machine Recognition Algorithm for Moving Plate Recognition System Yu Chen; Jun Cao; Aifei Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

According to the shortcomings of long time and big errors about the moving plate recognition system, we present the moving plate recognition algorithm based on color extraction and support vector machine. On the basis of the analysis of moving plate recognition system’s basic principles, it introduces the basic principles and calculation steps about color extraction and support vector machine algorithm, and discusses the feasibility of applying the algorithm to PRS in the paper. The experimental results show that the algorithm has the advantages of faster speed and higher accuracy of recognition. The algorithm provides a new thought for the research on the moving plate recognition algorithm. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2800
Soft Sensing Based on Hilbert-Huang Transform and Wavelet Support Vector Machine Qiang Wang; Xuemin Tian
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

At present, much more soft sensing have been widely used in industrial process control to improve the quality of product and assure safety in production. A novel method using  Hilbert-Huang transform(HHT) combined with wavelet support vector machine(WSVM) is put forward.Firstly the method analyzes the intrinsic mode function (IMF) obtained after the empirical mode decomposition (EMD), then extracts IMF energy feature as the input feature vectors of the wavelet support vector machine. Based on the wavelet analysis and conditions of the support vector kernel function, a novel multi-dimension admissible support vector wavelet kernel function is presented, which is a multidimensional wavelet kernel, thus enhancing the generalization ability of the SVM. The proposed method is used to build soft sensing of diesel oil solidifying point. Compared with other two models, the result shows that HHT-WSVM approach has a better prediction and generalization. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2817  
Precise Clock Synchronization Algorithm for Distributed Control Systems Yi Liu; Haiying Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The distributed control systems are applied widely in communication, navigation and power fields. With growing in both systems complexity and speed of data exchange, the real time performance of systems is required. Existing clock synchronization techniques include those for wide-area network (WAN) applications with large propagation delays, e.g., the Network Time Protocol (NTP), and those for control systems over local-area networks (LANs), e.g., the IEEE 1588 Precise Time Protocol (PTP). However, NTP-like protocols have only millisecond-scale precision, which is too coarse for many LAN applications such as instrument monitoring systems, high-quality digital audio systems and sensor networks. The 1588 PTP like protocols, which are still under development, require support of a highly precise hardware clock. The key point of the existing Ethernet test and measurement is that the method needs to achieve precision clock synchronization between different terminals. In this paper, an improved method is proposed with consideration of the time drift and propagation delay, expressing master-slave synchronization as a linear relationship and inducting the line of least squares fitting algorithm that traded as linear matrix form. The precision time protocol (PTP) is also analyzed in this paper. The experiment results show that the synchronization accuracy reaches sub-microsecond grade, which is the same as the PTP. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2832
Guarantee Agency Efficiency Evaluation Based on Super-Efficiency DEA-AHP Model Xu Ke; Liang Xuechun
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

In order to evaluate the efficiency of the guarantee agencies and achieve the purpose of identifying there competitive advantages, through the analysis of advantages and disadvantages of previous DEA-AHP methods, this paper puts forward a Super-efficiency DEA-AHP model, which can not only completely and more accurately rank the guarantee agencies but also comprehensively reflect the weights of the importance of each index which influence the efficiency of the guarantee agencies. Through the case analysis and the comparison with other models, the model shows its validity.DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2849
Multi-Field Coupling Mechanism of Electrolytic In-process Dressing- Ultrasonic Honing System Jicai Kuai
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper proposes the ELID (Electrolytic in Process Dressing) ultrasonic honing system, and conducts simulation for the solution - acoustic coupling mechanism of electrolyte between the anion and cathode of ELID ultrasonic honing system. Meanwhile, a comparative experiment is carried out for the ultrasonic honing and ordinary honing. The simulation results show that there is no obvious increase of the coupling speed of the system’s electrolyte, but the rapid change of local speed, which will accelerate the electrolyte renewal around the electrode, thereby intensifying the mass transfer of reactive ion of the electrochemical double layer, increasing the updating speed of ion concentration and speeding up the electrode reaction process; the intense variations of coupling pressure further enhances the updating speed of the electrolyte; Then the electrolytic parameters, ultrasound parameters and honing parameters obtained by simulation are respectively used to conduct experiments of ELID-ultrasound honing, ultrasound honing and traditional honing for ZrO2 ceramic. The comparative experiment results show that the machining accuracy of ELID-ultrasonic honing is 10 times of the traditional honing and twice of the ultrasonic honing; the new acoustic system adopted in ELID-ultrasound honing system reduces the amplitude, so the processing efficiency increase is not significant. This ELID-ultrasonic honing system is more suitable for the ultra-precision honing of certain difficult-to-cut materials. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2865
Intra-Inter Triplet Object Interaction Mechanism in Triplet-Based Hierarchical Interconnection Network Shahnawaz Talpur; Imran Ali Qureshi; Shahnawaz Farhan Khahro
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 7: July 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Object oriented languages usually avoid direct message passing, due to its complicated implementation, though that is the promising way to communicate in concurrently inherited objects. With the advancement in the high performance computing system, interaction between parallel application objects onto physical cores becomes one of the significant issues, which is not fully explored yet. In object oriented programming attribute data is included in objects and their state can be changed using the methods. Objects enable massage passing to other objects interacting with each other. Comprehensive problems can be molded by object-oriented methodology, and solves difficult program running object-oriented programs.Cores communicate with each other through communicator and groups in MPI, but in our reference architecture TBHIN (Triplet Based Hierarchical Interconnection Network), the cores are already faction in Triplets. We propose IITOIM Model to improve the performance with efficient intra-inter triplet cores communication mechanism between the objects in TBHIN. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2151

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