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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 55 Documents
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Search results for , issue "Vol 10, No 8: December 2012" : 55 Documents clear
Software reliability modeling with testing-effort function and imperfect debugging ZHAO Qian; ZHENG Jun; LI Jing
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Considering testing effort and imperfect debugging in reliability modeling process may further improve the fitting and prediction results of software reliability growth models (SRGMs). For describing the S-shaped varying trend of the testing-effort increasing rate more accurately, this paper first proposes a inflected S-shaped testing effort function (IS-TEF). Then this new TEF is incorporated into the inflected S-shaped NHPP SRGMs for obtaining a new NHPP SRGMs which consider S-shaped TEF (IS-TEFM-IS). We further discuss this new NHPP SRGM with two imperfect-debugging assumptions to propose two new NHPP SRGMs, i.e. IS-TEFM-IS-ID1 and IS-TEFM-IS-ID2. Finally these three new NHPP SRGMs and several comparison NHPP SRGMs are applied into two real failure data-sets respectively for investigating the fitting power of the IS-TEFM-IS, IS-TEFM-IS-ID1 and IS-TEFM-IS-ID2. The experimental results show that the inflected S-shaped NHPP SRGMs considering IS-TEF and imperfect indeed can yield the best accurate estimation results than the other comparison SRGMs. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1630
Analysis on Seismic Response of UHV Electric Equipment-Support Structure System Cui Cheng-chen; Lu Zhi-cheng; Zhu Zhu-bing
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

  To analyze the influence of the equipment and support structure on the system seismic response, two-particle model for UHV electric equipment-support structure system was established. The seismic response of the system was calculated by mode-superposition response spectrum method. The case study on the typical 1000kV electric equipment-support structure system verified the availability of the two-particle model. Based on the structure characteristics of UHV equipment and support structure, the effect of support structure on the system seismic response was obtained by parametric analysis about stiffness and mass of support structure. It was showed that suitable support structure could reduce earthquake load of equipment and improve seismic resistance of system. Conclusions provide reference for the design of support structure. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1648
A Situation Awareness Model of System Survivability Based on Variable Fuzzy Set Jinhui Zhao; Yu Zhou; Liangxun Shuo
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Because of the complexities and diversities of security alerts in modern networks, it is extremely difficult to precisely analyze and evaluate the survival situation. After analyzed the research progress of survival situation awareness, a hierarchical model of survival situational awareness is proposed, based on fusion technology of variable fuzzy set. In order to improve the discrimination of features, the efficient light-computation fusion mechanisms are employed to preproccess the multi-source data. Subsequently, the situation assessment adopted fusion technology of variable fuzzy set theory to improve the accuracy and objectivity of evaluation results. Finally, time series of services or hosts are introduced to judge the survival status and predict the trends by fuzzy reasoning. Experiments indicate that proposed model is suitable for a real network environment, and the perception results more scientific and accurate, which is valuable for generalizations and applications. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1691
Metropolis Criterion Based Fuzzy Q-Learning Energy Management for Smart Grids Xin Li; Chuanzhi Zang; Wenwei Liu; Peng Zeng; Haibin Yu
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

For the energy management problems for demand response in electricity grid, a Metropolis Criterion based fuzzy Q-learning consumer energy management controller (CEMC) is proposed. Because of the uncertainties and highly time-varying, it is not easy to accurately obtain the complete information for the consumer behavior in electricity grid. In this case, the Q-learning, which is independent of mathematic model, and prior-knowledge, has good performance. The fuzzy inference and Metropolis Criterion are introduced in order to facilitate generalization in large state space and balance exploration and exploitation in action selection in Q-learning individually. Simulation results show that the proposed controller can learn to take the best action to regulate consumer behavior with the features of low average end-user financial costs and high consumer satisfaction. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1626
Speed Control for High-speed Railway on Multi-mode Intelligent Control and Feature Recognition Hou Tao; Niu Hong-xia; Fan Duo-wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper is to put forward a new speed control method for the rapid development high-speed railway system. In this method, extracting the real-time feature information according to the characteristics of high-speed railway running process, and the inference engine find the matched characteristics mode in the characteristic pattern based on the current characteristics information. Using the speed closed-loop control design method, calculated the current speed error, and then based on the current error using the multi-modal intelligent control algorithm to control, and produce a corresponding controlled variable through the control rule set. And make a simulation system to value it. The results show that it has better dynamic performance and reliable steady-state performance.It a valuable  method to provide a advanced way for the train safer, faster and more comfort. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1642
Simulation on Gas Injection Refining Process with Mechanical Stirring Liu Yan; Shao Pin; Zhao Hongliang; Zhang Junhua; Zhang Ting’an
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Basing on the new method of in-situ desulfurization with gas injection and mechanical stirring, the effect of bubble dispersion and disintegration of three type impellers are numerically simulated by commercial CFD software Ansys Fluent 12.0. Numerical simulations of three-dimensional multiphase turbulence in gas injection and mechanical stirring are performed by adopting unsteady SM method coupled with Eulerian multiphase model and two-phase turbulence model. The information of gas-liquid fluid flow, velocity, turbulent kinetic energy and the power consumption are investigated and the results show that the SSB impeller can make bubbles get best dispersion and disintegration，and its power consumption is lower than VB impeller. The disk on the impeller blades can weaken the swirl flow in the upper zone of the impeller. Therefore, the bubble residence time is extended, and the bubble dispersing zone is also increased. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1659
A algorithm of fast digital phase modulation signal recognition Qu Jun-suo
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Classifications of digital modulation, the signal characteristics of the phase of the cycle will cause the phase wrapped and reduce overlapping signals in the received RF digital modulation automatically correct classification probability. According to the principle of minimum mean square, a phase modulation and phase modulation signal classification features as well as 2PSK and MPSK classification. The experiments illustrate the robust of the feature-based approach for automatic digital modulation classification and a higher recognition probability suitable to various pulse shaping filters, roll-off factors and symbol rates.DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1666
Minor Capacity Analysis of N Major Traffic Streams at Intersection Yang Xuehui; Luo Gaogui
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Based on the gap acceptance theory, this paper analyzed running state of the intersection streams about the main traffic priority controls. Theories were used in this paper, such as gap theory, the probability theory and the calculation methods of minor capacity under two vehicle streams. The calculating formula of minor capacity for n main vehicle streams was derived under the conditions of M3 distribution by the main stream headway at the uncontrolled intersection. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1636
The Research of Chaos-based M-ary Spreading Sequences GAO Qiang; YAN Hua; YANG Hongye
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

This paper is devoted to the generation and evaluation of the Chaos-based M-ary spreading sequences on communications systems. Sequences obtained by repeating a truncated and multi-ary quantized chaotic series are compared with classical m-sequences by means of the autocorrelation and cross-correlation properties and power-spectral features. Anti-noise performance of binary sequences and chaotic-based M-ary spreading sequences has been compared in the case of the same single-frequency interferences. Studies have shown that spectral features and anti-noise performance of chaotic-based M-ary spreading sequences which have great researching value are better than binary sequences. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1654
PHEVs Park as Virtual UPFC F. R. Islam; H. R. Pota
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Unified power flow controllers (UPFCs) are FACTS devices which can fulfil multiple power-flow control objectives, such as the need for reactive shunt compensation, phase shifting and series compensation. However, as they are quite expensive, they are not widely used. In this paper, the potential of a plug-in hybrid electric vehicle (PHEV) in a vehicle-to-grid (V2G) mode of operation using a PHEV charging station to provide a low-cost solution to the design of a virtual UPFC is explained. A third-order dynamic battery model is used to represent the PHEV, and the simulations carried out demonstrate that a PHEV has the potential to work as a virtual UPFC to improve power quality. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1673

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