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23,598 Article Results

Iris Image Quality Testing and Iris Verification

https://ijece.iaescore.com/index.php/IJECE/article/view/5427
Lidong Wang
The purpose of this study was to investigate the iris image quality and iris verification of eyes in brown, hazel, green, and blue, respectively, and the iris image quality and iris verification under different conditions such as the changed stand-off distances, the motions of the head and eyes, with glasses, and without glasses. A comparative study of three eye colors in brown, hazel, and green was conducted using a non-parametric method based on the H test. The H test results show that there is no significant difference in the iris image quality of eyes in brown, hazel, or green when the level of significance is 0.05.DOI:http://dx.doi.org/10.11591/ijece.v3i4.2769
Volume: 3
Issue: 4
Page: 429-435
Publish at: 2013-05-24

A Novel Two Switch Non-inverting Buck-Boost Converter based Maximum Power Point Tracking System

https://ijece.iaescore.com/index.php/IJECE/article/view/5436
Khandker Tawfique Ahmed , Mithun Datta , Nur Mohammad
A solar module can’t transfer maximum power to the load itself due to impedance mismatch. A maximum power point tracking (MPPT) system could be employed to have the maximum power.  A new MPPT system has been developed using Buck-Boost type DC-DC converter. The system is highly efficient and robust. PIC16F73 microcontroller has been used to control the DC-DC converter output. PV module output power is measured using microcontroller. The output power is compared with the previous module output power and the duty cycle of the converter is adjusted continuously to track MPP.  This process repeats until the output power reaches near to the maximum power point.In this paper, a maximum power point tracking (MPPT) system is developed using  two-switch non-inverting buck-boost converter. Perturb and observe (P & O) MPPT algorithm is used to transfer maximum power from the PV panel which is executed using a microcontroller.DOI:http://dx.doi.org/10.11591/ijece.v3i4.2772
Volume: 3
Issue: 4
Page: 467-477
Publish at: 2013-05-24

Enhancement of AC System Stability using Artificial Neural Network Based HVDC Controls

https://ijece.iaescore.com/index.php/IJECE/article/view/5430
Nagu Nayak Bhukya , Ramana Rao P.V. , Sydulu M.
In this paper, investigation is carried out for the improvement of power system stability by utilizing auxiliary controls for controlling HVDC power flow. The current controller model and the line dynamics are considered in the stability analysis. Transient stability analysis is done on a multi-machine system, where, a neural network controller is developed to improve the stability of the power system and to improve the response time of the controller to the changing conditions in power system. The results show the application of the neural network controller in AC-DC power systems and case studied at different fault locations.DOI:http://dx.doi.org/10.11591/ijece.v3i4.2590
Volume: 3
Issue: 4
Page: 441-455
Publish at: 2013-05-24

LQG Control of Unmanned Aerial Vehicles Under Communication Constraints

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2586
Yan-Mei Wang , Qing-Quan Liu
This paper addresses the LQG control problem for unmanned aerial vehicles (UAV) with time delays. In particular, the case with data-rate limitations is considered. It is shown in our results that the data rate of the communication channel has important effects on the control performances. It is derived that there exists a tradeoff between the data rate and the LQG cost.  A quantization, coding, and control scheme is proposed to stabilize the unstable plant. Simulation results show the validity of the proposed scheme. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.2426
Volume: 11
Issue: 9
Page: 4871-4877
Publish at: 2013-05-08

Disaster Rescue Simulation based on Complex Adaptive Theory

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2243
Feng Jiang , Liangtu Song , Yida Fan , Wenbo Li , Jie Zhang
Disaster rescue is one of the key measures of disaster reduction. The rescue process is a complex process with the characteristics of large scale, complicate structure, non-linear. It is hard to describe and analyze them with traditional methods. Based on complex adaptive theory, this paper analyzes the complex adaptation of the rescue process from seven features: aggregation, nonlinearity, mobility, diversity, tagging, internal model and building block. With the support of Repast platform, an agent-based model including rescue agents and victim agents was proposed. Moreover, two simulations with different parameters are employed to examine the feasibility of the model. As a result, the proposed model has been shown that it is efficient in dealing with the disaster rescue simulation and can provide the reference for making decisions. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2467
Volume: 11
Issue: 5
Page: 2402-2408
Publish at: 2013-05-01

Research on Surface Mounting Technology of Micromechanical Silicon Resonant Accelerometer

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2251
Libin Huang , Yang Gao
Surface mounting technology is a key process in MEMS packaging. The finite element model of package structures was established in this paper according to the designed micromechanical silicon resonant accelerometer. The effects of package substrate materials, adhesive material characteristics, uneven adhesive thickness, and adhesive defects on the micromechanical silicon resonant accelerometer were analyzed with ANSYS software. Results showed that the package substrate material strongly affected the resonance frequency of the resonator after the application of surface mounting technology. The Young’s modulus and thermal expansion coefficient of adhesives were found to be important factors that affect chip thermal stress and warpage. Uneven adhesive thickness and adhesive defects also affect the resonance frequency of the resonator. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2475
Volume: 11
Issue: 5
Page: 2460-2467
Publish at: 2013-05-01

Study on Fisher Analysis of Electroencephalograph Data

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2240
Yuan Shi , Qi Wei , Ruijie Liu , Yuli Ge
Objective In this paper, we have done Fisher discriminant analysis to Electroencephalogram (EEG) data of experiment objects which are recorded impersonally, come up with a relatively accurate method used in feature extraction and classification decisions. The present study is the groundwork analysis for other analysis in EEG study. Methods In accordance with the strength of  wave, the head electrodes are divided into four species. In use of part of 21 electrodes EEG data of 63 people, we have done Fisher discriminant analysis to EEG data of six objects. EEG data processing and statistic analysis adopted independently designed EEG analysis toolbox and the program of correlation analysis. Results In use of part of EEG data of 63 people, we have done Fisher discriminant analysis, the electrode classification accuracy rates is 82.3%. Conclusions Fisher discriminant has higher prediction accuracy, EEG features (mainly  wave) extract more accurate. Fisher discriminant would be better applied to the feature extraction and classification decisions of EEG data. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2464
Volume: 11
Issue: 5
Page: 2381-2386
Publish at: 2013-05-01

APSO-RBF Nonlinear Calibration Method in Carbon Anode Baking Temperature Measurement

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2239
Li Xiaobin , Sun Haiyan , Han Congdao , Zhang Jie
A correcting nonlinear errors of the thermocouple sensor based on Radial Basis Function Neural Network using particle swarm optimization are introduced. It solves t he shortcoming of Thermocouple Sensor’s application on large data. The result of experiment shows that the nonlinear calibration based on APSO-RBF has higher precision than the method based on RBF and ANFIS. Then, APSO-RBF is used to test fire path temperature in the anode baking. It is proved that the method is effective. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2463
Volume: 11
Issue: 5
Page: 2377-2380
Publish at: 2013-05-01

Development of Mobile Dua and Zikr for Hajj (MDZ4H)

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2283
Ahmed Sheikh Abdullah Al-Aidaroos , Abdul Nasir Zulkifli , Ruzinoor Che Mat
In the last decade, the number of mobile phone users has increased dramatically. Nowadays, mobile phone has become part of people’s life. Today’s mobile phones provide not just voice call and messaging services, but plethora of other services. This research is about the utilization of mobile phone for dua and zikr for Hajj. The main aim of this research is to develop a mobile Dua and Zikr application to help Hajj pilgrims to recite them while performing all the Hajj, Umrah and Ziarah rituals. At the moment, this research focuses on developing the application on Android platform. In developing the application, all the required Dua and Zikr have to be gathered, compiled and verified before the prototype could be developed using J2ME. The prototype consists of text and audio files of the recited Dua and Zikr in Arabic as well as the translations in Malay. The prototype has been proven to be useful in helping the pilgrims to easily and conveniently recite the Dua and Zikr towards achieving Hajj Mabrur. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2509
Volume: 11
Issue: 5
Page: 2723-2730
Publish at: 2013-05-01

Study on the Algorithm for Real-time Interpolation of NURBS Curve and Simulation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2258
Hui Jizhuang , Wei Fangsheng , Gao Kai
In the paper, In order to meet the needs of high-speed and high- accuracy computerized numerical control machining and guarantee the smooth running in the interpolation processing, A NURBS curve calculation based on adaptive acceleration and deceleration control of look-ahead s-shaped for the real-time interpolation is presented in this paper. The algorithm has merits such as higher position accuracy, short processing time, no variation and so on. Through dynamic path simulation and interpolation results analyses with MATLAB, the interpolation algorithm is proved to be correct and rational. Through actual machining by OPEN platform with VC++, the algorithm is proved to be real-time and practicable. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2482
Volume: 11
Issue: 5
Page: 2516-2525
Publish at: 2013-05-01

Research on Obstacle Recognition for UUV Based on Multi-beam Forward Looking Sonar

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2275
LIN Fei-yu
Obstacle recognition is one of the key technologies for Unmanned Undersea Vehicle (UUV). In this paper, the design of obstacle recognition based on multi-beam forward looking sonar is presented. First of all, Gaussian mixed model operator is adopted in adaptive threshold segmentation to segment the sonar image into regions of interest and background. Secondly, we use morphological  operation to remove noise and pseudo-target in the image. At last, obstacle contour is fitted into an ellipse using least squares method and then we calculate minimum and maximum distance, maximum and minimum azimuth angle between obstacle and multi-beam forward looking sonar. Results obtained on real sonar data are shown and discussed. Our experimental results show that the way can obtain accurate obstacle distance and azimuth angle information. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2500
Volume: 11
Issue: 5
Page: 2657-2662
Publish at: 2013-05-01

Center Line Coordinates Survey for Existing Railway by 3-D Constraints Method

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2294
Hui Wei , Hongtao Zhu , Zhiyong Wang , Weijun Wu
Since the maintenance of HSR depends both on inner geometries and outer geometries information of track, it’s necessary that the survey technologies could measure the smoothness and coordinates of track in a high-density manner. But the existing technologies for track survey are either inaccurate or inefficient for HSR maintenance, the problem about track survey arises with the rapid development of high-speed rail (HSR) in China. To meet the demands on track smoothness survey of existing line, a method denoted as 3-D Constraints Method is introduced in this paper. The general principle of the method is obtaining center line locus with location information by means of survey trolley and CP-Ⅲ stakes. By measuring the distances between trolley and CP-Ⅲ stakes, the boundary condition could be determined. So, the problem of center line calculation is transformed into the problem of definite integral for FOG signals. Accordingly, an algorithm of coordinate calculation is given. With the constraints form CP-Ⅲ stakes, the coordinates of center line could be obtained in a defined accuracy. Finally, the simulation result shows that the method is effective. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2556
Volume: 11
Issue: 5
Page: 2816-2821
Publish at: 2013-05-01

Demand Discipline of Air Transportation for Passengers

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2274
Yunqian Qu , Jinfu Zhu
The Yangtze River Delta (YRD) region in China is taken for an example to research demand discipline of air transportation for passengers in this paper. The discipline includes three parts: demand generation, distribution and flow. First of all, the key factors influencing demand generation are got with information entropy. A threshold is set to choose more important factors and weights of these factors are calculated at the same time. Contribution rate of a factor is definedto analyze the difference of the factors for different city. By comparing demand distribution with airports’ throughput, we can analyze the demand flow. There are some conclusions. The factors have different contribution rate to different city for demand generation. Aircraft movement is the most important factor influencing demand flow. It provides more accurate basis for market positioning and developing, airport layout in a multi-airport system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2499
Volume: 11
Issue: 5
Page: 2648-2656
Publish at: 2013-05-01

Automated Guide Vehicles Dynamic Scheduling Based on Annealing Genetic Algorithm

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2257
Zou Gan , Li Tao , Qin Ying
Dispatching automated guided vehicles (AGVs) is the common approach for AGVs scheduling in practice, the information about load arrivals in advance was not used to optimize the performance of the automated guided vehicles system (AGVsS). According to the characteristics of the AGVsS, the mathematical model of AGVs scheduling was established. A heuristic algorithm called Annealing Genetic Algorithm (AGA) was presented to deal with the AGVs scheduling problem,and applied the algorithm dynamically by using it repeatedly under a combined rolling optimization strategy. the performance of the proposed approach for AGVs scheduling was compared with the dispatching rules by simulation. Results showed that the approach performs significantly better than the dispatching rules and proved that it is really effective for AGVsS. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2481
Volume: 11
Issue: 5
Page: 2508-2515
Publish at: 2013-05-01

A Fuzzy Self-tuning Controlled Feeding Servo System of Machine Tool

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2235
Yueshan Wang , Liwan Chen , Zenghan Chen
The permanent magnet synchronous motor(PMSM) has been used widely for computer numerically controlled (CNC) feeding servo system (FSS) of machine tools. The control performance of the actual CNC-FSS depends on many parameters, and it has the properties of nonlinear uncertainty and time-varying characteristics. It is difficult to establish an accurate model for the actual CNC-FSS, therefore, a fuzzy self-tuning controller (FSC) of CNC-FSS was developed to overcome this problem in this paper. The proposed control strategy was based on fuzzy control theory combined with the conventional proportion integration differentiation (PID) control and its control algorithm. In this paper, we presented design of controller using FSC method and analyzed time response of the intelligent controller. Step response was plotted and analyzed to verify the effectiveness of the proposed controllers. Simulation results show that the FSC has minimum overshoot, minimum transient and steady state parameters, which shows the more effectiveness and efficiency of FSC than conventional PID controller to control the position of the CNC-FSS. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2459
Volume: 11
Issue: 5
Page: 2351-2358
Publish at: 2013-05-01
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