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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
 430   431   432   433   434 
Surname Inherited Algorithm Research Based on Artificial Immune System Jing Xie; Yaobin Hu; Huiling Zhu; Yulin Wang
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 6: June 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

To keep the diversity of antibodies in artificial immune system evolution process, this paper puts forward a kind of increase simulation surname inheritance algorithm based on the clonal selection algorithm, and identification and forecast the Vibration Data about CA6140 horizontal  lathe machining slender shaft workpiece prone . The results show that the algorithm has the characteristics of flexible application, strong adaptability, an effective approach to improve efficiency of the algorithm, a good performance of global searching and broad application prospect. DOI: http://dx.doi.org/10.11591/telkomnika.v11i6.2668
Inter-Harmonics in Voltage-Sourced Converters based High Voltage Direct Current Systems Phuc Huy Nguyen
Indonesian Journal of Electrical Engineering and Computer Science Vol 13, No 1: January 2015
Publisher : Institute of Advanced Engineering and Science

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Abstract

Voltage-Sourced Converter (VSC) is the main component in a VSC-based High Voltage Direct Current (HVDC) system. In addition to the characteristic harmonics, the inter-harmonics could be originated from the characteristic of each converter working at different modulation frequencies, or from a distorting frequency on one or both ac (or dc) systems. The space vector representation of VSC’s switching functions is used as a tool for analyzing and giving the understanding how the inter-harmonics appear. Based on the methodological analysis, simulation models were built and implemented using SimPowerSystems in MATLAB for cases. The simulation results show that, a series of inter-harmonics is produced tend to be dominant in low-frequency range, especially the negative-sequence inter-harmonics which have lower frequencies than the fundamental. This elaborate understanding of VSC-based HVDC system’s inter-harmonic characteristic could be beneficial to harmonic measurement and mitigation control. DOI: http://dx.doi.org/10.11591/telkomnika.v13i1.6809 
A novel Quaternion-based 2D-3D Registration Algorithm with Line Correspondence Xinghang Zhang; Yuhang He
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

Image’s registration includes 2D-2D, 3D-3D and 3D-2D registration. This paper only concentrates on the 2D-3D registration, the image’s attitude is represented by a rotation matrix R, while the position is a translation vector T. Traditional approaches mainly focus on points correspondences, and state-of-the-art approaches concentrate on high-order structures, i.e. lines, rectangle, parallelepiped etc. Mathematically, Most existing solutions adapt either linear optimization or iteration methods.  However, they need the position, attitude initialization, which are not always available in real scene, and they do not guarantee to find global solutions.In this paper, instead of solving these polynomials directly, we introduce a novel approach ( say qLR ), which treat these multivariate polynomial equations as “monomials” and express R in a quaternion vision, resulting in dramatic decrement of the number of equations. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4465
LSA & LDA topic modeling classification: comparison study on e-books Shaymaa H. Mohammed; Salam Al-augby
Indonesian Journal of Electrical Engineering and Computer Science Vol 19, No 1: July 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v19.i1.pp353-362

Abstract

With the rapid growth of information technology, the amount of unstructured text data in digital libraries is rapidly increased and has become a big challenge in analyzing, organizing and how to classify text automatically in E-research repository to get the benefit from them is the cornerstone. The manual categorization of text documents requires a lot of financial, human resources for management. In order to get so, topic modeling are used to classify documents. This paper addresses a comparison study on scientific unstructured text document classification (e-books) based on the full text where applying the most popular topic modeling approach (LDA, LSA) to cluster the words into a set of topics as important keywords for classification. Our dataset consists of (300) books contain about 23 million words based on full text. In the used topic models (LSA, LDA) each word in the corpus of vocabulary is connected with one or more topics with a probability, as estimated by the model. Many (LDA, LSA) models were built with different values of coherence and pick the one that produces the highest coherence value. The result of this paper showed that LDA has better results than LSA and the best results obtained from the LDA method was (0.592179) of coherence value when the number of topics was 20 while the LSA coherence value was (0.5773026) when the number of topics was 10.
Ultrasonic Automatic Tracking System Dai Juan; Zhao Zhihong; Yan Minglian
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

Ultrasonic ranging system has many characteristics, such as well-directionality, small volume, and low price, but fails to realize a long distance measured. In order to realize exactly locating motion objects, multiple ultrasonic sensors are adopted to measure their motion orientation so that their 2D coordinates should be located and positioned, which results in calculations complicated and meanwhile measurement subject to errors. This study addresses a measurement method to realize automatically tracking motion objects. It has a reasonable distribution structure of the ultrasonic sensors adopted, critical tracking calculation method, which makes it possible to solve complex problems of equations. As it has simple control instruction sequence, it is able to precisely control timing period and effectively solve measure error caused by irregular delay from commands. These programs and methods are well deployed in the parameters collection and status control system for a moving object. DOI: http://dx.doi.org/10.11591/telkomnika.v12i6.5449 
Multiple Disciplines Product Design Knowledge Representation Strategy Based on Ontology and Semantic Network Guohai Zhang; Yusheng Li
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 10: October 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

The complicated products design is a process of conflict resolution and integration decision for collaborative optimization involved in multiple disciplines including mechanical engineering, electronical engineering and control engineering, etc. It’s also a multi-disciplinary field of complex knowledge fusion process. The architecture of the product design knowledge is given by the description of the forms of knowledge in complex product design. The representation mechanism for multidisciplinary knowledge based on ontology and formal definition of the design knowledge ontology are put forward by using the theories and methods of ontology and semantic network. Finally, the multiple disciplines design knowledge expression strategy is proposed based on the above analysis and conclusions. This paper provides a new method and means for complicated product design knowledge representation involving the integration of multidisciplinary knowledge. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3467 
Modeling collaborative practical work processes in an E-learning context of engineering electric education Fahd Ouatik; Mustapha Raoufi; Mohamed El Mohadab; Farouk Ouatik; Belaid Bouikhalene; Mohammed Skouri
Indonesian Journal of Electrical Engineering and Computer Science Vol 16, No 3: December 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v16.i3.pp1464-1473

Abstract

This work deals with the modeling  the processes of the collaboration in practical work of electronics in a context of e-learning and the remote laboratory which is a new technology allows students to manipulate the practical experience the electronics by controlling all equipments  and instruments of a laboratory via the web without moving to t laboratory. That is for to solve the problems of overcrowding students in universities and the restriction of  time and places and the lack of some instrument in laboratory.  Even this new project will allow the sharing all  instruments and equipments between  universities in the world for to have a cooperation in scientific learning. In this work we are interested to modeling the processes of collaborative electronics practical work, whose actors are :   tutor,  member,  coordinator and the secretary and collaborative tools. Two models have been developed: a tutor-student model showing the activities of the learner and  tutor, and  moderating-member-secretary model that focuses more specifically on the roles of the moderator (coordinator) and the secretary (reporter). This modelling has made it possible to better understand the processes considered and to detect the various problems that may arise during an online particle work collaborative process.
Study on the Testing Method for Marine Diesel Engine Miaofen Zhu; Guojin Chen; Zhongmin Liu; Tingting Liu; Shaohui Su; Yijiang Cao
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 2: February 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

For the high-power low-speed diesel engine’s performance and reliability evaluation, this paper studies the engine’s running-in norms, presents the Test Scheme about the combustion process, the Inlet swirl control, the cooling system control, and the distribution and emission. The whole engine’s test methods and systems are established. By using the combined method of the test platform research and the theoretical model analysis, the diesel engine’s performance and reliability tests are made to evaluate the engine’s design. DOI : http://dx.doi.org/10.11591/telkomnika.v12i2.4212 
Research on Early Fault Diagnostic Method of Wind Turbines Zhai Yongjie; Wang Dongfeng; Zhang Junying; Han Yuejiao
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 5: May 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Challenging environmental factors combined with high and turbulent winds make serious demands on wind turbines and result in significant component fault rates. In this paper, an early fault diagnostic research is conducted upon wind turbines. Firstly, the SCADA (Supervisory Control and Data Acquisition) system is used to analyze the units’ long-hour operating data, preparing for the further modeling work. Then the MSET (Multivariate State Estimation Technique) is adopted to estimate the temperature of the gear box and to obtain a result of high accuracy; with the Moving Window Calculation (MWC), the residual value between the estimated value and the real value is studied to get the dynamic trend of its average value; according to this trend in training, we define the threshold region of the residual mean value. Considering a man-made deviation in the observation vectors, faults of the gear box are simulated and studied. When the residual mean value curve exceeds the setting thresholds, an alert will be given to remind the operators of hidden problems in the unit. Research shows that this early diagnostic method is quite effective in detecting the abnormal performance of wind turbines in a real-time manner. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2457
Graph Kernels and Applications in Protein Classification Jiang Qiangrong; Xiong Zhikang; Zhai Can
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 10: October 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i10.pp7501-7508

Abstract

Protein classification is a well established research field concerned with the discovery of molecule’s properties through informa­tional techniques. Graph-based kernels provide a nice framework combining machine learning techniques with graph theory. In this paper we introduce a novel graph kernel method for an­notating functional residues in protein structures. A structure­ is first modeled as a protein contact graph, where nodes ­corres­pond to residues and edges connect spatially neighboring resi­dues. In experiments on classification of graph models of proteins, the method based on Weisfeiler-Lehman shortest path kernel with complement graphs outperformed other state-of-art methods.

Page 432 of 920 | Total Record : 9199

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