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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 9,174 Documents
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Transient Analysis of a Multi-phase Induction Machine Operating as Generator Alok Kumar Mohanty; K B Yadav
Indonesian Journal of Electrical Engineering and Computer Science Vol 2, No 1: April 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v2.i1.pp79-87

Abstract

Multi-phase machines are considered serious contenders as compared to the three phase machines for variable applications in generating mode. This paper presents the transient performance analysis of a multi-phase induction machine operating in six-phase mode for power generation. In this paper the simulation and experimental analysis of a six-phase machine in generating mode have been made. The simulations are made and the machine functionality was investigated during no-load and when subjected to different types of loads. Experimental results are provided to confirm the ability of these models to represent during no load as well as during load period and the result were found to be satisfactory for power generation.
The combination Prediction of BTP in Sintering Process based on Bayesian Framework and LS-SVM SONG Qiang; WANG Ai-min; ZHANG Yun-su
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 sintering process is a complex process with the characteristics of uncertainty, multivariable coupling, time-varying and time-delay. The Burning-Through-Point (BTP) , which is a import parameter in sintering process , is affected by many reasons and difficult to be controlled to the required precision by conventional control methods. This paper presents a new time-series forecasting methods, which is called Bayesian Least Squares Support Vector Machines（LS-SVM）.  The method applies the Bayesian evidence flame work to infer automatically model parameters of LS-SVM regression.ALS-SVM model is proposed on the basis of the Bayesian LS-SVM models. Several intelligent forecasting key techniques of sintered ore’s chemical components including algorithms of nonlinear SVM in regression approximation, selection of kernel functions and parameters and standardizing of sample data,Bayesian evidence flame-work are studied ; and the control schedules of  BTP based on interval optimization are analyzed. At last, a new intelligent forecasting system of BTP are designed and implemented. Experiment results show that the LS-SVM prediction designed within the Bayesian evidence framework consistently yields good generalization performances, which the method of combining Bayesian theory and LS-SVM is faster and more accurate for the BTP in compare with BP neural network and GM(1,1). DOI: http://dx.doi.org/10.11591/telkomnika.v11i8.3087 
Performance of Environmental and Energy Audit for Manufacturing Industrial Buildings. Norfishah Ab Wahab; N. A. Sahril; A. Amiruddin; Zuhaila Mat Yasin; N. A. Salim; N. A. Rahmat; N. F. A. Aziz
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 2: November 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i2.pp534-541

Abstract

Environmental and energy audit of industrial building is important as it may help in providing a comfortable workplace for the staff as well as to observe the company’s environmental practices during operational hours while managing the energy usage in an efficient manner. It is also important in ensuring the company comply with applicable laws and regulations This paper discusses on the environmental and energy audit to identify the performance of environmental and energy efficiency in two manufacturing industrial buildings with heavy machineries. Analyses on the energy performance, visual comfort and thermal improvement including recommended solutions for optimization of energy efficiency and environmental aspects of the two buildings are presented. Energy efficiency and environmental aspects covered in this audit study are the illuminance of the building, indoor building temperature, relative humidity and carbon dioxide (CO2) percentage in indoor air quality. Jabatan Kerja Raya (JKR) standards is used as a benchmark to observe the illuminance of the buildings, Malaysian Standard 1525 (MS1525) is used as a quality control for temperature and relative humidity, while Department of Occupational Safety and Health, 2005 (DOSH 2005) is used as a quality control for CO2 percentage in air. Based on the results from the audit, the performance for both industrial building is compared. It was found that the energy efficiency and environmental performance for Factory A is better than Factory B.
Enhanced Time of Use Electricity Pricing for Industrial Customers in Malaysia Nur Azrina Mohd Azman; Md Pauzi Abdullah; Mohammad Yusri hasan; Dalila Mat Said; Faridah Hussin
Indonesian Journal of Electrical Engineering and Computer Science Vol 6, No 1: April 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v6.i1.pp155-159

Abstract

New Time of Use (ToU) tariff scheme known as Enhanced ToU (EToU) has been introduced on 1st January 2016 for industrial customers in Malaysia. EToU scheme is the advanced version of current ToU where the daily time frame is divided into six period blocks, as compared to only two in the existing ToU. Mid-peak tariff is introduced on top of peak-hour and off-peak tariff. The new scheme is designed to reduce Malaysia’s peak hour electricity demand. On customer side, they could be benefited from the low off-peak tariff by simply shifting their consumption. However, it depends on their consumption profile and their flexibility in shifting their consumption. Since EToU scheme is voluntary, each customer needs to perform cost-benefit analysis before deciding to switch into the scheme. This paper analyzes this problem by considering EToU tariff scheme for industry and customer’s electricity consumption profile. Case studies using different practical data from different industries are presented and discussed in this paper.
Design and analysis of pseudo hadamard transformation and non-chaotic substitution based image encryption scheme Prajwalasimha S N; Kavya S R; Tanaaz Zeba Ahmed
Indonesian Journal of Electrical Engineering and Computer Science Vol 15, No 3: September 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v15.i3.pp1297-1304

Abstract

In this paper, Pseudo Hadamard Transformation (PHT) and non-chaotic substitution based image encryption scheme has been proposed. Images are characterized by intrinsic properties such as, strong redundancy and correlation between the adjacent pixels, hence more vulnerable to cyber-attacks. In the proposed technique, the redundancy and correlation have been effectively reduced by pixel position transformation using PHT and pixel value variation using non chaotic substitution, providing two stage security in encryption for images. Fifteen standard test images are considered for experimental analysis. Better average Number of Pixel Changing Rate (NPCR) and Unified Average pixel Changing Intensity (UACI) are obtained for a set of standard test images compared to more popular existing algorithms.
Research on Real-time and Dynamic Urban Traffic Information Service System Hui Yu; Weihua Zhang
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 4: August 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

With the acceleration of urbanization and the rapid growth of private cars, the traffic congestion is increasingly becoming a “chronic illness” for urban development. This paper describes what exactly the real-time and dynamic urban traffic information service systemis. Furthermore, the pieces of technology needed and the benefits of the system will be discussed. Finally, we conclude with issues and problems that to be resolved in order to have a fully functional system. DOI: http://dx.doi.org/10.11591/telkomnika.v10i4.871
Research on bridge cranes Energy-saving index reduction based on rough set theory Wei Ye; Yifei Tong; Dongbo Li; Xiangdong Li; Xucheng Yuan
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 12: December 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Bridge crane is one of the most widely used cranes in our country, which is indispensable equipment for material conveying in the modern production. The most important indicator of crane performances is energysaving. So it is of importance to research on the bridge cranes energysaving assessment. Thus the establishment of assessment index system is a necessary task. Rough set theory is applied widely for researching on incomplete and uncertain information processing. Through reducing the  properties by rough set theory, redundant properties are removed and an optimized index assessment system can be obtained.In this paper,establishing  the index system of the bridge crane based on  the full life cycle of the bridge crane firstly. Secondly,defining the decision attribute and the condition attributes. Thirdly,using rough set theory to reduce  the index system of the bridge crane.Finally,an optimized index assessment system of the bridge can be obtained. The research lays the foundation for solving weight for the next step. DOI: http://dx.doi.org/10.11591/telkomnika.v11i12.2793
Design and Simulation of Multiple Coil Model for Wireless Power Transmission System Duan Zhao; Enjied Ding; Yanjun Hu; Zhifeng Sun
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

In Wireless Power Transfer (WPT) systems the proportion of energy received by the load is critical and the efficiency is the more significant parameter. WPT systems use resonant inductive coupling, where it is the near field wireless transmission of electrical energy between two coils that are highly resonant at the same frequency. This paper aims to propose a design of an optimal two dimensional (2D) structure of transmitter and receiver. Multiple overlapping coils structures in the transmitter side are proposed, in order to achieve higher efficiency than the typical single coil transmitter. Simulation results showed that the axial component of magnetic induction resulted from the overlapping coils structure has preferable homogeneous distribution. The proposed system achieved an efficiency value of 90 % for a receiver placed 20 cm away from a 4 coils transmitter comparing to an efficiency value of 75% for the same distance using a single coil transmitter. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5119
Study of high indium InXGa1-XN alloys with synchrotron radiation Wei Zheng; Zhe Chuan Feng; Rui Sheng Zheng; Hao-Hsiung Lin; Xin Qiang Wang; Ting-Shan Chan; Ling-Yun Jang; Chee Wee Liu
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 2: February 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

InGaN thin films with near entire indium composition range have been successfully grown on GaN/sapphire (0001) by molecular beam epitaxy (MBE). X-ray absorption fine structure  have been used to study the local structure of some typical InxGa1-xN alloys with high indium (In) composition of x=0.78 and 0.86. A detailed analysis of the extended x-ray absorption fine structure of In K-edge by using the IFEFFIT program, and the chemical bonds of In-N are obtained. The x-ray absorption near-edge structure of In K- and L-edge and N K-edge are investigated, and the electronic structure of InxGa1-xN are determined with these high In content InxGa1-xN ternary compounds. The calculated XANES spectra of N K-edge, based on first principle method, are consistent with the observed spectra. DOI: http://dx.doi.org/10.11591/telkomnika.v11i2.2050
Cryptographic Hashing Method using for Secure and Similarity Detection in Distributed Cloud Data A. Mohamed Divan Masood; S. K. Muthusundar
Indonesian Journal of Electrical Engineering and Computer Science Vol 9, No 1: January 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v9.i1.pp107-110

Abstract

The explosive increase of data brings new challenges to the data storage and supervision in cloud settings. These data typically have to be processed in an appropriate fashion in the cloud. Thus, any improved latency may originanimmense loss to the enterprises. Duplication detection plays a very main role in data management. Data deduplication calculates an exclusive fingerprint for each data chunk by using hash algorithms such as MD5 and SHA-1. The designed fingerprint is then comparing against other accessible chunks in a database that dedicates for storing the chunks. As an outcome, Deduplication system improves storage consumption while reducing reliability. Besides, the face of privacy for responsive data also arises while they are outsourced by users to cloud. Aiming to deal with the above security challenges, this paper makes the first effort to honor the notion of distributed dependable Deduplication system. We offer new distributed Deduplication systems with privileged reliability in which the data chunks are distributed across a variety of cloud servers. The protection needs an different of using convergent encryption as in foregoing Deduplication systems.

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