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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 101 Documents
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Search results for , issue "Vol 12, No 6: June 2014" : 101 Documents clear
Object-Oriented Publish/Subscribe System Biao Dong
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

Existing methodologies based on the request/response model for system software design, rooted in principles of object-oriented design, lead to tightly-coupled interactions, and lack coordination capacities. The publish/subscribe(P/S) paradigm is particularly suitable for loosely- coupled communication environment. A design of event and subscription models under an object- oriented environment was motivated by the idea of using P/S paradigm for an object-oriented environment. The P/S service is comprised of two subsystem-compiler and executor. In each subsystem, its form, working process, and typical algorithms are analysed from the point of object-oriented and technology of P/S paradigm separately. Experiment was simulated in the following two aspects: user’s model and middle code generation, and shows that using the P/S service improves the usability of P/S systems. DOI: http://dx.doi.org/10.11591/telkomnika.v12i6.5391 
Wireless network Risk Assessment Model and Application JianGang 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

Wireless network makes up the wired network shortcomings. With the popularity of the WiFi terminal, the security threats are constantly upgrading, and the security issues have been plaguing the legitimate user. In this paper we had analyzed the risks mechanism of WLAN for network resources, and designed an assessment model of security risk. When the incidents of network security which caused for vulnerability factors had been occurred, the model can be used to assess the consequences and impact on WLAN. The model achieves the network security early warning and control by scientific measurement and evaluation of the WLAN security risks. Wireless network security is not only with authentication, encryption, integrity testing and other technology-related, but also need intrusion detection systems, firewalls and other technology cooperation, so it’s a multi-layered problem. DOI: http://dx.doi.org/10.11591/telkomnika.v12i6.5446 
Energy Harvesting Device Based on Spatial Electric Field in Substations Hongwei Li; Ganrong Peng
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.pp4771-4777

Abstract

It is rich in electric field energy in high voltage substations while it is hardly collected and utilized. A novel energy harvesting device based on spatial electric field is presented in this paper, which is composed of capacitive energy collector and conditioning circuit. A simulation model of the energy collector is established to study the relationship between output voltage and its structural parameters and is verified by no-load tests. There are some restraining factors such as output voltage unstable in the traditional conditioning circuit. A new conditioning circuit is designed to overcome the problems and this new circuit is more effectively. This paper designs a new device to harvest the electric field energy within substations and it can provide broad potential use in the future.
The Modeling and Stress Analysis of Wind Turbine Blade Hao Wang; Bing Ma; Jiaojiao Ding; Shuaibin 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

With the development of wind power generation technology, the wind turbine blade is becoming more and more important. Modeling and stress analysis of the wind turbine blade are very critical for the further design and the application of wind turbine blade. The small-scale wind turbine blade was focused on, considering the glass fiber reinforced plastic material. Based on the parameters of airfoil and the geometrical parameters of blade, the three-dimension model of blade was established with the modeling software. Then the model was introduced into ANSYS software to carry out the FEM analysis. According to the displacement solution of blade, the maximal displacement occurs in the blade tip while working, but it is less than the safety displacement of wind turbine. And the stress concentration occurs in the center of the blade, which corresponds to the comprehensive stress from the elastic stress solution of the wind turbine blade.Last, it can be found that the thermal stress does not play a major role from the thermal stress solution. The FEM results were compared with the tensile strength of the material and the safe displacement. Therefore, the effectiveness of FEM model and real safety of blade were verified. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5536
A Novel Clustering Routing Protocol in Wireless Sensor Network Wu Rui
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 phenomenon of network resource-constrained often appears in wireless sensor network (WSN) because of nodes with energy-limited, so it becomes a research topic to study on high-performance routing protocol in wireless sensor network. In accordance with the characteristic of quantum particle swarm optimization (QPSO), a novel clustering routing protocol with QPSO algorithm is proposed based on the low energy adaptive clustering hierarchy (LEACH), which includes several steps, such as determining the number of cluster-head, preliminary clustering, optimization on temporary cluster by QPSO algorithm, clustering after optimization, and so on. Comparative analysis on simulation experiments show that the proposed routing protocol is superior to that of LEACH, and saves energy consumption of network excellently and balances energy of nodes so as to prolong the life of the network.DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5533
Design of Enterprise Production and Sales measures and Forecast Information System Based on WEB Gao Shuzhi; Zhao Na
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 enterprise supply of raw materials and production, sales, product information integration as a research object, on the basis of J2EE architecture and the Spring framework, building Web Based Enterprise production and distribution and prediction of multi-tier architecture ERP system. First, use spring+hibernate implementation of MVC design mode ; and, with mvc mode implementation of J2EE Multi - Application System schema, development function perfect enterprise sales management system ; last, use move average law, and Trend Forecast law, and index smooth law, and line type the most Xiaoping method and curve type the most Xiaoping method Five kind of algorithm average to sales accurate real - time forecast, decision sector can developed accurate production plan to effective guidance production job. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5470
Realization of Direct Current System Insulation Monitoring Device Based on Fault Amplifying Method Zhou Jun; Yang Sheng-qiang; Zhu Bo-nan
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.pp4485-4490

Abstract

This paper has analyzed the existing direct current (DC) system insulation monitoring methods. In view of poor anti-jamming and low sensitivity of existing methods, a new insulation monitoring device is designed based on Fault amplifying method. Under the condition of ensuring system security, the device detection resistors are put into the system by control switches, data is collected by the sensors and set to host computer by CAN bus. At last, the host determines insulation condition of the system by calculating the insulation resistances. This paper has introduced the main test circuit and program flow chart. It is verified by experiments and field operation that the device which is perfectly suitable for online DC insulation monitoring of power plants and transformers can monitor the insulation condition of system accurately and the sensitivity is high. DOI: http://dx.doi.org/10.11591/telkomnika.v12i6.5486
The Research and Desige of the CNC Constant Voltage Power Shiwei Lin
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

CNC constant voltage power is composed by the analog power circuit, MCU control circuit , pulse width modulation circuit, a power driver amplifier , analog to digital conversion circuit , the input voltage setting circuit and the output voltage display circuit. The power possesses the functions of digital regulator, high precision output, short-circuit & over-current protection and alarm functions, especially for a higher accuracy requirements for various occasions. DOI: http://dx.doi.org/10.11591/telkomnika.v12i6.5443
Severe-Dynamic Tracking Problems Based on Lower Particles Resampling Xungao Zhong; Xiafu Peng; Xunyu Zhong
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

For a target as it with large-dynamic-change which is still challenging for existing methods to performed robust tracking. The sampling-based Bayesian filtering often suffer from computational complexity associated with large number of particle demanded and weighing multiple hypotheses. Specifically, this work proposes a neural auxiliary Bayesian filtering scheme based on Monte Carlo resampling techniques, which to addresses the computational intensity that is intrinsic to all particle filter, including those have been modified to overcome the degeneracy of particles. Tracking quality for severe-dynamic experiments demonstrate that the neural via compensate the Bayesian filtering error, with high accuracy and intensive tracking performance only require lower particles compare with sequential importance resampling Bayesian filtering, meanwhile, our method also with strong robustness for low number of particles. DOI : http://dx.doi.org/10.11591/telkomnika.v12i6.5493
Finite Element Analysis for Bobbin Tool Friction Stir Welding X.M. Liu; J.S. Yao; Z.D. Zou; Y. Cai; H. Meng
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.pp4854-4860

Abstract

With DEFORM-3D finite element software, by thermo-mechanical coupling method, the physical modle for bobbin tool friction stir welding was set up. By this model, the temperature field and flow field of AA 2014 aluminium alloy work plate of 6mm was analyzed, which provides useful information for the investigation of this new process. Simulation results show that the temperature field of the cross section presents symmetry approximately about the mid thickness of the work plate. The high temperature zone has large radius at bottom and top surfaces near the shoulders while small radius at the mid thickness, like a waist, which is verified by the experiments. The relativey highest steady temperature keeps about 360℃. Groove defects are easy to be found in the simulation.

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