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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
 386   387   388   389   390 
A coplanar waveguide tapered slot antenna with beam switching capabilities Delphine Abijuru; M. R. Hamid; N. Seman; M. Himdi
Indonesian Journal of Electrical Engineering and Computer Science Vol 20, No 1: October 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v20.i1.pp275-280

Abstract

A wideband tapered slot antenna (TSA) with three radiating elements for beam switching purpose is proposed in this study. The integrated radiating taper slots in assistance with metal strips acting as switches provided the proposed design with the capability of switching its beam into three different directions while maintaining the antenna performance stable. To validate the accuracy of the proposed design, the prototype was fabricated and measurements were conducted in terms of reflection coefficient (S11), radiation pattern and realized gain towards the three different operating modes. By sequentially, activating the switches, the antenna main beam rotated 90º in the XY coordinates. A realized gain ranging from 4.3 to 6.4 dBi and a wide operating bandwidth (|S11| ≤-10dB) from 3.3 GHz to 5 GHz  were observed throughout the antenna performance in simulation as well as in experiment. With the covered bands, the proposed antenna can be suitable for Sub -6GHz wireless communications systems. Improvements of Trapezoid Antenna Gain using Artificial Magnetic Conductor and Frequency Selective Surface.
Data Transmission System based on PCI bus & fiber-optical link Hu Yongbing; Zhou Yunfei; Wei Xingyun
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 3: March 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

To achieve real-time monitoring and control of a measurement and control system is often applied in industrial control, with the host computer. In accordance with the requirements of real-time data transmission, a hardware system with a FPGA as the main control unit for the logical interface, the PCI bus and the high-speed fiber-optic link as the data transmission channels communicating with the host computer and a measurement control system respectively is built; the debugging are completed for the HSSL IP core and the PCI interface module; the system test is fulfilled among the host computer, the data transmission board and the specific monitoring control board. DOI: http://dx.doi.org/10.11591/telkomnika.v11i3.2212
Study on China’s Electronic Information Industrial Agglomeration and Regional Industrial Competitiveness Xuan Zhaohui; Wu Aizhi; Lv Yongbo
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

Spatial agglomeration and industrial competitiveness are currently two key issues in the study of China’s electronic information industrial development. Based on the data for 1995 - 2010, this paper establishes the indicator system to evaluate the competitiveness of regional electronic information industry. In this paper, location Gini coefficient and the indicator of concentration rate are applied to analyze the characteristics and historical evolution of China’s electronic information industrial agglomeration, while benchmarking analysis is also applied to evaluate the competitiveness of provincial regional electronic information industry. The correlation between industrial agglomeration and industrial competitiveness is analyzed in this study. There is a significant positive correlation between them at present. DOI: http://dx.doi.org/10.11591/telkomnika.v11i7.2854 
Research on the Glass Silicon Anodic Direct Bonding Parameters Jia Li; Guo Hao; Guo Zhiping; Miao Shujing
Indonesian Journal of Electrical Engineering and Computer Science Vol 16, No 2: November 2015
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v16.i2.pp291-295

Abstract

By MEMS packaging test platform for bonding process of bonding temperature and bonding time,and test silicon specifications experimental study.Firstly,according to the anodic bonding principle,the main factors to detemine the effect of bonding quality.Secodly,change the bonding temperature,bonding time,and test wafer size and other parameters,glass silicon bonding contrast test.Finally,the calculation and analysis of comparative test of each group is bonded porosity,summanrized the factors that affect the quality of the bonding and bonding to achieve the best results in the bonding conditions.Experimental results indicate that when the bonding voltage of 1200V,bonding temperature of 445-455c,bonding time is 60s,the void fractin is less than 5%.Glass and Silicon wafer bonding quality can achieve the best. The experimental results in order to improve the glass silicon bonding quaity provides the basis.
Short-term Power Load Forecasting Based on Gray Theory Cui Herui; Bo Tao; Li Yanzi
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 11: November 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

Power load forecasting provides the basis for the preparation of power planning, especially the accurate short-term power load forecasting. It can formulate power rationing program of area load reliably and timely, to maintain the normal production and life. This article describes the gray prediction method, and improves GM (1,1) model via processing the original data sequence smoothly, using the correction model of parameteramending parameter values, adding the residual model, and also applying the idea of the metabolism. It conducts an empirical analysis of the 10KV large cable of Guigang Power Supply Bureau in Nan Ping, and verifies the limitations of ordinary gray theory. The improved gray model has a higher prediction accuracy than the conventional GM (1,1) model. DOI: http://dx.doi.org/10.11591/telkomnika.v11i11.3547  
Distribution Grid Reactive Power Optimization Based on Improved Cloud Particle Swarm Algorithm Hongsheng Su
Indonesian Journal of Electrical Engineering and Computer Science Vol 11, No 1: January 2013
Publisher : Institute of Advanced Engineering and Science

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Abstract

To resolve the problems that cloud particle swarm optimization(CPSO) was easily trapped in local minimum and possessed slow convergence speed and early-maturing during distribution grid reactive power optimization, CPSO algorithm was improved based on cloud digital features in this paper. The method firstly combined Local search with global search together based on solution space transform, where the crossover and mutation operation of the particles were implemented based on normal cloud operator. And then the dramatic achievements were acquired in time-consuming and storage-cost using the improved algorithm. Finally, applied in bus IEEE30 system, the simulation results show that the better global solution is attained using the improved CPSO algorithm, and its convergence speed and accuracy possesses a dramatic improvement. DOI: http://dx.doi.org/10.11591/telkomnika.v11i1.1727
The Research of Welding Residual Stress Based Finite Element Method Qinghua Bai
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

Welding residual stress was caused by local heating during the welding process, tensile residual stress reduce fatigue strength and corrosion resistance, Compressive residual stress decreases stability limit. So it will produce brittle fracture, reduce working life and strength of workpiece; Based on the simulation of welding process with finite element method, calculate the welding temperature field and residual stress, and then measure residual stress in experiments, So as to get the best welding technology and welding parameters, to reduce welding residual stress effective, it has very important significance. DOI: http://dx.doi.org/10.11591/telkomnika.v11i6.2661
Skin and Clothes Matching Seeded by Color System Selection Rahmadi Kurnia; Meza Silvana; Ikhwana Elfitri
Indonesian Journal of Electrical Engineering and Computer Science Vol 14, No 3: June 2015
Publisher : Institute of Advanced Engineering and Science

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Abstract

This work has designed an automated system to recommend clothe for people based on their skin. Skin colors from various races were relate with a variety of clothing colors to obtain their harmonization value. This research  involve  30 respondents through  questionnaire to provide initial views  to a variety of colors to match the skin color variation. Input from the respondents is then analyzed to choose the right color system to be linked with skin color. To determine the relationship between skin color and clothes color fuzzy logic rules were used. The system was then tested again to 30 respondents. The results showed that variations in skin color and clothing are best on a combination of Cr and Saturation. DOI:  http://dx.doi.org/10.11591/telkomnika.v14i1.7235 
An Improved Robot Path Planning Algorithm Based on Genetic Algorithm Xuesong Yan; Qinghua Wu; Hammin Liu
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 8: December 2012
Publisher : Institute of Advanced Engineering and Science

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Abstract

Robot path planning is a NP problem; traditional optimization methods are not very effective to solve it. Traditional genetic algorithm trapped into the local minimum easily. Therefore, based on a simple genetic algorithm and combine the base ideology of orthogonal design method then applied it to the population initialization, using the intergenerational elite mechanism, as well as the introduction of adaptive local search operator to prevent trapped into the local minimum and improve the convergence speed to form a new genetic algorithm. Through the series of numerical experiments, the new algorithm has been proved to be efficiency. We also use the proposed algorithm to solve the robot path planning problem and the experiment results indicated that the new algorithm is efficiency for solving the robot path planning problems and the best path usually can be found. DOI: http://dx.doi.org/10.11591/telkomnika.v10i8.1191 
Moiré Fringe Phase Difference Measurement Based on Spectrum Zoom Technology Li Chang; Gai Cui
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

Grating displacement measurement technique is an important means to achieve precise displacement measurement of nanometer scale. Moiré fringe phase difference measurement is the basis of grating displacement measurement technique. Traditional Moiré fringe subdivision method based on DFT algorithm has low frequency resolution relatively when extracting Moiré fringe fundamental frequency spectral line, which causes frequency and phase measurement errors of Moiré fringe fundamental frequency. CZT spectrum zoom technique can improve the frequency resolution of frequency band near Moiré fringe fundamental frequency and get fundamental frequency spectrum lines more exactly, which can solve the problem of low frequency resolution of DFT. The paper studies the relation of Moiré fringe phase difference and grating displacement, and analyzes the working principles of DFT and CZT spectrum zoom method. DFT and CZT spectrum zoom are used for Moiré fringe spectrum analysis and phase difference calculation respectively. Simulation results show measurement error of Moiré fringe phase difference with DFT algorithm is in 10-3degree scale, while measurement error with CZT spectrum zoom algorithm is approximate 0 degree. The comparison results show CZT spectrum zoom method has better performance and applicability, which improves the phase difference measurement accuracy of Moiré fringe effectively. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3461 

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