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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 :
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Articles 85 Documents
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Search results for , issue "Vol 11, No 7: July 2013" : 85 Documents clear
Improving Relevance Feedback in Image Retrieval by Incorporating Unlabelled Images Guizhi Li
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 content-base image retrieval, relevance feedback (RF) schemes based on support vector machine (SVM) have been widely used to narrow the semantic gap between low-level visual features and high-level human perception. However, the performance of image retrieval with SVM active learning is known to be poor when the training data is insufficient. In this paper, the problem is solved by incorporating the unlabelled images into the learning process. We proposed a semi-supervised active learning algorithm which uses not only labeled training samples but also unlabeled ones to build better models. In relevance feedback, active learning algorithm is often used to reduce the cost of labeling by selecting only the most informative data. In addition, we introduced a semi-supervised approach which employed Nearest-Neighbor technique to label the unlabeled sample with a certain degree of uncertainty in its class information. Using these samples, Fuzzy support vector machine (FSVM) which takes into account the fuzzy nature of some training samples during its training is trained. We compared our method with standard active SVM on a database of 10,000 images, the experiment results show that the efficiency of SVM active learning can be improved by incorporating unlabelled images, and thus improve the overall retrieval performance. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2807
Integrated Rudder/Fin Concise Control Based on Frequency Domain Analysis W. Guan; Z. J. Su; G. Q. 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

This paper describes a concise robust controller design of integrated rudder and fin control system in use of the closed loop gain shaping algorithm (CGSA) strategy. Compared with the arbitrary selection of weighting function in integrated rudder and fin H∞ mixed sensitivity control design procedures, the CGSA methods provided a relatively more straightforward and concise design method. Simulations were described that the overall performance of each CGSA rudder and fin control loop and the interaction between them. Hence, it can be concluded that the integrated rudder and fin CGSA control scheme is very suitable to present and indeed feasible for future practical application. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2834
A Maneuvering Target Tracking Algorithm Based on the Interacting Multiple Models Liu Yan-Chang; Zuo Xian-Gang
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 view of the limitation of the traditional Kalman filter with which the tracking has big calculation amount and low tracking precision base on the model of CV or CA movement, a algorithm is suggested in the present article which is the Interacting Multiple Models Kalman filter(IMM-KF) with the CV and CA model. Under keeping invariant of the tracking precision of linear motion, This method can make the tracking precision of curve motion approach the linear motion’s. The system simulation results show that this algorithm improved the tracking precision of system with the IMM-KF. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2851 
Drum Cutting Specific Energy Consumption Model Built by Cutting Curves Analysis Gao Kui-Dong; Du Chang-Long; Jiang Hong-Xiang
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

  For so much error caused in drum’s cutting specific energy consumption calculation when using sharp cutter’s cutting specific energy formula, the drum’s torque mathematical model and cutting specific energy consumption mathematical model which took Goktan’s conical pick cutting mathematical model as basic was established refer to the drum cutting curves of the sequence drum, the punnett square drum, the aberrance 1 drum and the aberrance 2 drum. The tests of four type drums and four sequence drums which installed different cone angles were carried out in cutting test bed. The results indicate that: the similarity of calculate result and test result can support the theoretical research;cutting torque and cutting specific energy consumption rise with the cone angle increasing; the minimum torque and cutting specific energy consumption was produced by 2-starts vane punnett square drum, 3-tarts vane aberrance drums produced more larger torque and cutting specific energy consumption；Using punnett square drum in coal cutting can reduce cutting specific energy consumption, but 3-tarts vane aberrance drums have no advantage compared with 2-tarts vane sequence drum in reducing cutting specific energy consumption. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2869
Two-step Classification Algorithm Based on Decision-Theoretic Rough Set Theory Jun Wang; Yulong Xu; Weidong Yu
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 introduces rough set theory and decision-theoretic rough set theory. Then based on the latter, a two-step classification algorithm is proposed. Compared with primitive DTRST algorithms, our method decreases the range of negative domain and employs a two-steps strategy in classification. New samples and unknown samples can be estimated whether it belongs to the negative domain when they are found. Then, fewer wrong samples will be classified in negative domain. Therefore, error rate and loss of classification is lowered. Compared with traditional information filtering methods, such as Naive Bayes algorithm and primitive DTRST algorithm, the proposed method can gain high accuracy and low loss. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2802 
Chemical Source Localization using Mobile Robots in Indoor Arena Yuli Zhang; Xiaoping Ma; Yanzi Miao
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 presents a virtual-physics force based control strategy for swarm robotic chemical source localization. The control force includes: structure formation force, goal force, and obstacle avoidant force. For swarm formation, the robots maintain the regular polygon formation and a virtual robot is located at the center of the polygon. The motion of the virtual robot depends on the goal force which obtained from the sensor observations of the robots. Once the virtual robot moved to a new place, the robots would also move as a single body with the structure formation force and obstacle avoidant force. In this paper, we adopted chemotaxis as plume tracing algorithms. Simulation experiments in indoor arena without obstacle and with obstacles using different robot number are carried out respectively, and the results show that the proposed strategy can effectively navigate the mobile robotics swarms to the chemical source once selecting proper number of robots. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2819 
Research on Control Method for Intermediate Point Temperature of Supercritical Boiler Based on Active Disturbance Rejection Cascade Control Junjie Gu; Xiaowei Cao
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 important signal of once-through boiler's water-fuel ratio control, intermediate point temperature of supercritical boiler plays a key role in the decision of steam and water’s boundary, the match of fuel and water, the control of main steam temperature. The condition of its control directly impacts the once-through boiler’s safety and economy running. For an uncertainty model, a good control quality can not be gained using the general PID controller when the unit load has great changes, so that the main steam temperature fluctuates greatly. According to this problem, a control system about intermediate point temperature of supercritical boiler based on active-disturbances-rejection multiple model was designed. Corresponding active disturbances rejection controller (ADRC) about different model in different operation points was designed. It can choose corresponding controller according to the operation condition so as to achieve an adaptive control of a wide range. The simulation results show that the system has a strong robustness and sufficient capability for control. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2846
Electric Insulation Detection Method for High-voltage Insulators Wang Jiajun; Hong Bin; Wang Hongmei
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 principle of partial discharge detection is that through partial bridged discharge under high voltage electric field, it detects the inner air-filled cavity of high-voltage insulators. And it is a nondestructive detection method based on discharge magnitude to judge the insulation quality. The detecting system that adopts the partial discharge detection is more rigorous than testing system for electricity products, which must have small discharge capacity and higher sensitivity. This paper describes the principles of partial discharge detection and analysis insulation detection. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2862
Intuitiveness 3D objects Interaction in Augmented Reality Using S-PI Algorithm Ajune Wanis Ismail; Mohd Shahrizal Sunar
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

Numbers of researchers have developed interaction techniques in Augmented Reality (AR) application. Some of them proposed new technique for user interaction with different types of interfaces which could bring great promise for intuitive user interaction with 3D data naturally. This paper will explore the 3D object manipulation performs in single-point interaction (S-PI) technique in AR environment. The new interaction algorithm, S-PI technique, is point-based intersection designed to detect the interaction’s behaviors such as translate, rotate, clone and for intuitive 3D object handling. The S-PI technique is proposed with marker-based tracking in order to improve the trade-off between the accuracy and speed in manipulating 3D object in real-time. The method is robust required to ensure both elements of real and virtual can be combined relative to the user’s viewpoints and reduce system lag. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2797 
A Novel Design of Aircraft Fuel Tank Inspection Robot Guochen Niu; Zunchao Zheng; Qingji Gao; Weijuan Wang; Lei 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

Aircraft fuel tank leakage is a very common maintenance problem. A continuum robot is designed for troubleshooting of leaks for fuel tank which has strong constraints and is also explosive. The biomimetic robot with several flexible sections applies actuation redundancy through pulling its four independent driving cables to realize bending motion of two degrees of freedom (DOF). The forward kinematics about the relations of cables lengths, angles and tip coordinates of single section is established using projection curvature method and coordinates transformation method. The decoupled multi-section kinematics function is deduced based on the kinematics analysis of single section. Simulations of single section motion are presented. We demonstrate finally the correctness of kinematics method through prototype experiments. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2814

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