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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 9,199 Documents
 183   184   185   186   187 
Insulating Material Erosion in Atmospheric Non-Thermal Plasma Jet Device Kamal M Ahmed; Tarek M Allam; Mohamed Anwar Abouelatta; Sayed A Ward; Ahmed A Lashin; Hanaa M Soliman
Indonesian Journal of Electrical Engineering and Computer Science Vol 3, No 3: September 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v3.i3.pp663-670

Abstract

This paper reports on the selection of insulating material types in a developed atmospheric-pressure non-thermal plasma jet (ANPJ-II) device which was operated previously in our laboratory based on the minimum erosion area of the insulator’s nozzle. Three identical insulator groups used in our experiment include; Teflon insulator material with different thicknesses of 1.5 mm and 2 mm respectively, and Ceramic insulating material with thickness of 2 mm. ANPJ-II device is operated with each of the three insulator groups. These insulators are operated and analyzed with different operation times for compressed Air or Nitrogen gas with a flow rate of 12 L/min and input voltage of 6 kV.  The erosion area of these insulator materials is measured as a function of the operation time. The Ceramic insulator was found to have the minimum erosion area. Also, the temperature of both the cathode and the insulating material (Teflon or Ceramic) are measured to study the effect of operation time and the gas type on the device components.
A New Approach of Localized Human Blood Reheating Using High Frequency Converter Pradip Kumar Sadhu; Palash Pal; Animesh Halder; Ankur Ganguly; Nitai Pal; Prabir Bhowmik
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 1: April 2015
Publisher : Institute of Advanced Engineering and Science

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Abstract

The paper presents the human blood reheating technique for medical purposes with high frequency induction heating system. The temperature is analyzed to determine the heat distribution in different positions of human blood within the non metallic tank. In the proposed induction heating system, the inductive applicator is a primary working coil of the modified half bridge high frequency inverter and the RBCs within the blood will be working as secondary element. The simulation shows that the heating area can be effectively controlled by using the cylindrical shield with adjustable space. However, the efficiency of heat can be increased by varying the radius size of cylinder thereby more flux appears and more eddy emf is induced. Hence the resulting eddy current increases the refrigerated blood of range 1ºC- 6ºC to 37ºC. DOI: http://dx.doi.org/10.11591/telkomnika.v14i1.7262
Analysis on Issues of Variable Flow Water System Jinming Yang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 9: September 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Variable flow water system has played an important role in the field of energy saving with the Electronic Variable Frequency Drive (VFD) widely used in practical projects. How to control the frequency converter to work properly is an essential issue which we must first emphatically solve. The control technology of frequency converter is closely related to characteristics of pumps. Based on the mathmatical a model of pumps with or without inverters, the article discusses some issues in detail, such as inverters configuration, flow rate regulation and overload. These are key issues of control technology of variable flow water system. For those multiple-pump water systems, the engineers may select synchronous frequency conversion control technology or Add-Sub pumps control technology to achieve the maximum energy-saving benefits. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3294  
ORD-GAP: a hybrid-based labeling schemes to support XML dynamic updates Aisyah Amin; Su-Cheng Haw; Samini Subramaniam
Indonesian Journal of Electrical Engineering and Computer Science Vol 18, No 3: June 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v18.i3.pp1596-1606

Abstract

eXtensible Markup Language (XML) has been widely used as the standard for data exchange standard over the Internet. With the fast growing rate of data, especially with high updates, it is crucial to ensure that the XML is able to cope with frequent changes with very least effect on the existing structure. Therefore, in this paper, we investigate on the existing labeling schemes and mapping approaches to gauge a better understanding in terms of the robustness of the labeling schemes and the importance of the mapping schemes. Next, we propose ORD-GAP labeling schemes to identify the structural relationship among XML nodes and yet, it is persistent to re-labeling when new nodes are inserted. Subsequently, a mapping scheme is proposed to transform XML into Relational Database (RDB). Preliminary experimental evaluation demonstrated that the proposed approach achieve 66% better as compared to ORDPATH, and 56% better as compared to ME labeling in terms of data loading time. 
Research and Implementation of PLC Editor System Qingchao Wei; Qizhong Cai; Congse Xie
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

According to the new type of portable PLC programming device adopting the own invention technology, a PLC editor system with ARM microprocessor and μC/OS-II system as the core was constructed. Logic operation instructions with multiple operands and their encodes were designed. The data storage capacity was expanded. A CAN extension protocol was formulated. Two-way chain table was adopted to edit PLC source instruction file dynamically, and the file was compiled to a binary object code file. According to CAN extension protocol format the object code file was encoded and sent to PLC host via CAN Bus. The results show that the system improves editing efficiency and the running speed of PLC host. Many sets of source instruction files’ storage, PLC source instruction file compiled accurately, the highly reliable communication and monitoring PLC host are implemented. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4424
Design of a Distribution Network Power Quality Monitoring System based on Metering Automation Systems and its Application Feng Tianrui; Ouyang Sen
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 7: November 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

According to the situation that almost all the power quality systems (PQM) focus on the transmission network rather than the distribution network (DN), a distribution network power quality monitoring system (DNPQMS) based on metering automation systems is proposed in this paper. This DNPQMS can take full advantage of the power data collected by the existing intelligent terminals that set throughout the DN. The DNPQMS is divided into three parts, including equipment layer, data layer and application layer. The equipment layer consists of power quality monitoring devices, including the power quality monitoring device based on dual-CPU platform and intelligent terminals of other manufacturers. The data layer completes the power data storage and integrated that collected by the intelligent terminals. The application layer completes the day-to-day maintenance and management of the system as well as a number of advanced applications. The verification of the DNPQMS by application is presented at the end of the paper. DOI: http://dx.doi.org/10.11591/telkomnika.v10i7.1450
Application of Immune Log-Normal Evolutionary Programming in Distributed Generation Installation M. H. Mansor; I. Musirin; M. M. Othman; S. A. Shaaya; S. A. Syed Mustaffa
Indonesian Journal of Electrical Engineering and Computer Science Vol 6, No 3: June 2017
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v6.i3.pp730-736

Abstract

Nowadays, the location and sizing of distributed generation (DG) units in power system network are crucial to be at optimal as it will affect the power system operation in terms of stability and security. In this paper, a new technique termed as Immune Log-Normal Evolutionary Programming (ILNEP) is applied to find the optimal location and size of distributed generation units in power system network. Voltage stability is considered in solving this problem. The proposed technique has been tested on the IEEE 26 bus Reliability Test System to find the optimal location and size of distributed generation in transmission network. In order to study the performance of ILNEP technique in solving DG Installation problem, the results produced by ILNEP were compared with other meta-heuristic techniques like evolutionary programming (EP) and artificial immune system (AIS). It is found that the proposed technique gives better solution in term of lower total system loss compared to the other two techniques.
Elliptical BandPassThree Dimensional Frequency Selective Surface with Multiple Transmission Zeros Bimal Raj Dutta; Binod Kumar Kanaujia; Chhaya Dalela
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: December 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i3.pp1020-1029

Abstract

An elliptic band pass response three-dimensional Frequency Selective Surface (3D FSS) is designed from a single unit cell of 2D array of two shielded microstrip lines. The designed FSS provides pseudo-elliptic band-pass frequency response (5.4 – 9.6) GHz with its application in long-distance radio telecommunications and space communications etc. The four transmission zeros at 5.4GHz, 9.6GHz, 12.4GHz and 15GHz provides wide out-of-band frequency rejection. The 3D FSS is independent of the variations in the incident angle of the plane wave up to 60 degree. Each unit cell is a combination of two shielded microstrip lines with one having an air gap and the other one having in between rectangular metallic plate. When a TE polarized plane wave incidents perpendicular to the perfect electric conductor (PEC) boundary walls shielded microstrip lines, it results in two quasi-TEM modes namely air and substrate mode. The 3D FSS consists of multiple resonators with a multimode cavity having number of propagating modes. These resonating modes in phase provide transmission poles and when out of phase give transmission zeros. The 3D FSS structure is simulated using Ansys HFSS software with improved performance over 2DFSS, for many practical applications such as antenna sub-reflector, radomes and spatial filters.
Behavior of DFIG Wind Turbine During Unbalanced Grid Voltage Omer Elfaki; Wang Zezhong; Liu Qihui
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp4934-4943

Abstract

The use of doubly fed induction generators (DFIGs) in wind turbines has become quite common for the last few years. These machines provide variable speed and are driven with a power converter which is sized for a small percentage of the turbine-rated power. This paper presents a detailed model of an induction generator coupled to wind turbine system. Modeling and simulation of the induction machine using vector control computing technique is done. DFIG wind turbine is an integrated part of the distributed generation system, therefore, any abnormality’s associates with grid are going to affect the system performance considerably. Taking this into account, the performance of DFIG variable speed wind turbine under network fault is studied using simulation developed in MATLAB/SIMULINK.
Hybrid Feature Selection Based on Improved GA for the Intrusion Detection System Shu-xin Zhu; Bin Hu
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 4: April 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

High dimensionality is one of the most troublesome difficulties encountered in intrusion detection system analysis and application. For high dimension data, feature selection not only can improve the accuracy and efficiency of classification, but also discover informative subset. Combining Filter type and Wrapper type characteristics, this paper proposes a hybrid type method for feature selection using a improved genetic algorithm contained reward and punishment mechanism. The mechanism can guarantee this algorithm rapid convergence on approximate global optimal solution. According to the experimental results, this algorithm performs well and it's time complexity is low. Keywords: intrusion detection system; genetic algorithm(GA); Feature selection; Mutual information; hybrid type.DOI: http://dx.doi.org/10.11591/telkomnika.v11i4.1823

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