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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 101 Documents
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Search results for , issue "Vol 12, No 6: June 2014" : 101 Documents clear
Study on VRPTW based on Improved Particle Swarm Optimization Wang Fei
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

Vehicle routing problem with time windows (VRPTW) is a typical non-deterministic polynomial hard (NP-hard) optimization problem. In order to overcome PSO’s slow astringe and premature convergence, an improved particle swarm optimization (IPSO) is put forward. In the algorithm, it uses the population entropy to makes a quantitative description about the diversity of the population, and adaptively adjusts the cellular structure according to the change of population entropy to have an effective balance between the local exploitation and the global exploration, thus enhance the performance of the algorithm. In the paper, the algorithm was applied to solve VRPTW, the mathematical model was established and the detailed implementation process of the algorithm was introduced. The simulation results show that the algorithm has better optimization capability than PSO. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5395
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 
Structural Intensity Simulation of Bolt Joints in Vibration Environment Yongjuan Zhang; Guoying Zeng; Dengfeng Zhao
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i6.pp4876-4881

Abstract

The paper a nonlinear model of bolt joints structure in vibration environment is built, including the friction, contact and so on complex nonlinear factors. Structure Intensity (SI) of it is calculated by Finite Element Method（FEM）as an approach for the state identification of bolts joints structure in vibration environment. The plots of the structure intensity vector under different tightening torque were obtained and showed the SI changes of bolt joints structure with different tightening torque, and showed the energy distribution and transmission at different tightening torque.In order to compare, The SI maps of of rigid connected beam at different tightening torque also were obtained.
Fuel Cell – Ultra Capacitor hybrid system for Grid Connected Applications Vijaya Priya; D.P. Kothari; M. Kowsalya
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

Fuel cells are considered as one of the most promising devices for standalone/grid connected distributed generations due to its cleanliness, modularity and higher potential capability.  In the present energy scenario, Fuel cells combined with other renewable technologies are gaining attraction. This paper focuses on the combination of Fuel Cell (FC) and Ultra-Capacitor (UC) systems for sustained power generation.  Model of Proton Exchange Membrane (PEM) Fuel Cell have been developed in the MATLAB/Simulink Environment. To supply the required hydrogen moles, Electrolyzer model was developed.  Hydrogen storage tank was modeled such that the generated moles of hydrogen from the electrolyzer are stored in the storage tank and the fuel cell receives the required amount of hydrogen moles from the storage tank rather than the electrolyzer.  The combined system was synchronized to the grid and when the load demand exceeds the capacity of the fuel cell system, then the additional power is supplied by the grid thus ensuring continuity of supply to the load. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5052
Research on Warehouse Target Locating and Tracking Based on EKF and UKF Bian Guangrong; Kong Fancheng; Zhang Honghai; Cao Jinrong; Shi Hongyan
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

The paper firstly established the warehouse target locating and tracking system model based on wireless sensor networks. The principle of Location and tracking is applying maximum likelihood estimation algorithm of multilateral measurement method to calculating the coordinates of the unknown node. According to monitoring motion trajectory of the same unknown target node within a continuous period of time, the motion equation can be established. When the state equation of warehouse target tracking system is non-linear, EKF and UKF filtering algorithm are respectively applied to acquiring the state estimate of the warehouse target motion equation, so as to achieve the effective tracking of warehouse target. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5063
Real-time Implementation of a xAVS Video Decoder Qing Chang; Xin Liu; YaoLi Wang
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

AVS video decoder consumes a huge number of computation, so real-time implementation of an AVS decoder has some challenging on x86 computing platform. This article describes a xAVS open source project to solve this problem. First of all, the reason for the low efficiency of the code of the existing AVS video decoder open source reference software RM52J_r1 is analyzed according to the description of AVS key technologies and decoding principles in the official documentation. Then according to the main problems of the reference software, re-design the optimized xAVS decoder architecture, and real-time property significantly improved with C code. Finally, use the x86 platform multimedia instruction sets to further optimize xAVS semantic processor. The experimental results show that, under the precondition of ensuring the quality of decoding, the decoding speed of the xAVS decoder for D1 has increased more than 14 times, to fully meet the needs of real-time decoding. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5473
Improved Fuzzy Evaluation Model Analysis of Nuclear Power Plant Operational Safety Performance Dongxiao Niu; Zongyun Song; Jinpeng Liu
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i6.pp4505-4511

Abstract

The evaluation on nuclear power plant operational safety performance had great significance on whether the nuclear power plant operated safely or not. Currently the academic literatures on nuclear power plant operational safety performance are rare. Improved Fuzzy evaluation model which introduce confidence level had been used into the evaluation of nuclear power plant operational safety performance. The article built safety performance indicator system and further established importance level evaluation matrix which showed the indexes relative importance, and established performance evaluation matrix which represented indicators impact on operational effect. From the importance level evaluation matrix the weigh and confidence of indicators can be gained and from the performance evaluation matrix the evaluation matrix can be gained. The preliminary evaluation result and synthetic confidence can be obtained by multiplying evaluation matrix by indicator weigh and confidence, and then the final evaluation result can be achieved. DOI: http://dx.doi.org/10.11591/telkomnika.v12i6.5389
Forecast Model of Water Quantity Based on Back Propagation Artificial Neural Network Shihua Li
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

Back Propagation (BP) neural network, Widely adopted and utilized in automatic control, image recognition, hydrological forecasting and water quality evaluation, etc., as one of the Artificial Neural Networks, has stronger function and property of mapping, classification, functional fitting. This article takes the water flow of Lanzhou section of Yellow river in China as an example by the way of BP model to predict the water quantity. It is well proved that BP network model can reach the purposes of early warning and forecasting. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5444
Thermal Simulation and Experiment of Lunar Drill Bit in Vacuum Jinsheng Cui; Xuyan Hou; Deming Zhao; Yousong Hou; Qiquan Quan; Xiang Wu; Zongquan Deng; Shengyuan Jiang; Dewei Tang
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

Drilling samples of lunar soil is an important and indispensable part of China’s lunar exploration project. The drill bit temperature during the drilling process is one of the key concerns for scholars, especially for the hard lunar rock drilling in vacuum. In this article, the simulation analysis of drilling in atmosphere and vacuum is conducted. Moreover, a fiber grating temperature measuring system integrated with vacuum drilling system is established. Experiment on lunar rock stimulant in atmosphere and vacuum is taken out and compared. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5496
Passenger Flow Forecasting using Support Vector Regression for Rail Transit Bin Xia; Fanyu Kong; Songyuan Xie
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 6: June 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i6.pp4840-4848

Abstract

Support vector regression is a promising method for the forecast of passenger flow because it uses a risk function consisting of the empirical error and a regularized term which is based on the structural risk minimization principle. In this paper, the prediction model of urban rail transit passenger flow is constructed. It is to build an urban rail transit passenger flow forecast model and select the optimal parameters from the support vector regression through the variable metric method to obtain the minimal value from the LOO error bounds. The passenger flow is forecast by means of both support vector regression method and BP neural network method, and the results show that the support vector regression model has such theoretical superiority as minimized structural risk, thus having a higher forecasting accuracy under small sample conditions for short-term rail transit passenger flow, which predicts the promising forecasting performance that the method has.

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