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27,404 Article Results

Performance Relay Assisted Wireless Communication Using VBLAST

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3748
M.M. Kamruzzaman
In this paper, performance of relay assisted wireless link is evaluated using VBLAST in the presence of rayleigh fading where source is equipped with two transmit antennas, relay is equipped with multiple transmit and multiple receive  antennas, and destination has multiple receive antennas. The input information are modulated using QPSK or 16 QAM or 64 QAM modulator and modulated information are encoded using VBLAST and then split into streams which are simultaneously transmitted through transmit antennas of source.Relay decodes the rayleigh fading effected signal and re-encodes using VBLAST and forwards for destination. It is observed that relay with 2 transmit antennas and 2/3/4/5/6 receive antennas provides 9-11.5 dB gains compared to direct link. And there are around 3 dB to 11 dB gains for increasing number of receiving antennas at relay and destination from 2 to 3/4/5/ 6. DOI:  http://dx.doi.org/10.11591/telkomnika.v12i8.6031 
Volume: 12
Issue: 8
Page: 6259-6266
Publish at: 2014-08-01

Comprehensive Evaluation to Distribution Network Planning Schemes Using Principal Component Analysis Method

10.11591/ijeecs.v12.i8.pp5897-5904
Wang Ruilian , Gao Shengjian
Aiming to the complexity of vibration fault cause, the great many of fault parameters in hydroelectric generating set, and the superiority of grey relation analysis for its no strict requirement to fault sample capacity and regularity, the weighted grey relation model is built to look for the vibration fault type. The fuzzy matrix's transformation arithmetic is used to obtain the weight vectors of the grey relation coefficient, thus the weighted coefficient is the weighted grey relation model. The relation coefficient between reference sequence and compare sequence in vibration fault sample is provided by synthetic arithmetic of fuzzy weight to diagnose the vibration fault type. The grey relation coefficient weighted by fuzzy synthetic arithmetic, which is not only made the established weight be a scientific basis, but also can “sensitive” highlight the vibration fault type of hydroelectric generating set. Thus the problem of looking for every fault types is better resolved. By analyzing the practical example, it proved that the weighted grey relation model in the paper can effectively diagnose the vibration fault type of hydroelectric generating set and it has definite applicability.
Volume: 12
Issue: 8
Page: 5897-5904
Publish at: 2014-08-01

Brain Emotional Learning for Classification Problem

10.11591/ijeecs.v12.i8.pp5793-5800
Reza Mahdi Hadi , Saeed Shokri , Omid Sojodishijani
Emotional learning is new tool in the field of machine learning that the inspired from limbic system. The various models of emotional learning (BEL) have been successfully utilized in many learning problems. For example, control applications and prediction problems. In this paper a new architecture based on a brain emotional learning model that can be used in classification problem (BELC). This model is suitable for high dimensional classification applications. To evaluate the proposed method have been compare it with the Multilayer Perceptron (MLP), K-Nearest Neighbor (KNN), Naive Bayes classifier and Brain Emotional Learning-Based Pattern Recognizer (BELPR) methods. The obtained results show the effectiveness and efficiency of the proposed method for classification problems.
Volume: 12
Issue: 8
Page: 5793-5800
Publish at: 2014-08-01

Study on the Influence of Grid Voltage Quality

10.11591/ijeecs.v12.i8.pp5918-5925
Guiping Yi , Renjie Hu
Industrial Static Var Generator (SVG) is typically applied at or near the load center to mitigate voltage fluctuation, flicker, phase unbalance, non-sine distortion or other load-related disturbance. Special attention is paid to the influence of grid voltage quality on SVG current, the non-sine distortion and unbalance of grid voltage causes not only the AC current distortion and unbalance but also the DC voltage fluctuation. In order to let the inverter voltage contain the fundamental negative sequence and harmonic component corresponding to the grid voltage, a new dual-loop control scheme is proposed to suppress the influence in this paper. The harmonic and negative sequence voltage decomposition algorithm and DC voltage control are also introduced. All these analyses can guide the practical applications. The simulation results verify the feasibility and effectiveness of the present control strategy and analyses.
Volume: 12
Issue: 8
Page: 5918-5925
Publish at: 2014-08-01

Decision Support System For A Customer Relationship Management Case Study

10.11591/ijict.v3i2.pp88-96
Özge Kart , Alp Kut , Vladimir Radevski
Data mining is a computational approach aiming to discover hidden and valuable information in large datasets. It has gained importance recently in the wide area of computational among which many in the domain of Business Informatics. This paper focuses on applications of data mining in Customer Relationship Management (CRM). The core of our application is a classifier based on the naive Bayesian classification. The accuracy rate of the model is determined by doing cross validation. The results demonstrated the applicability and effectiveness of the proposed model. Naive Bayesian classifier reported high accuracy. So the classification rules can be used to support decision making in CRM field. The aim of this study is to apply the data mining model to the banking sector as example case study. This work also contains an example data set related with customers to predict if the client will subscribe a term deposit. The results of the implementation are available on a mobile platform.
Volume: 3
Issue: 2
Page: 88-96
Publish at: 2014-08-01

Performance Evaluation of Filters of Discrete Wavelet Transforms for Biometrics

10.11591/ijict.v3i2.pp97-102
Priya Bhirud , Nandana Prabhu
Biometrics associated with automated methods of identifying a person or verifying the identity of a person based on physiological or behavioral characteristics. Commonly used biometric features are facial features, fingerprints, voice, facial thermo grams, iris, posture/gait, palm print, hand geometry etc. Compared with other biometric characteristics iris is the most stable and hence the most reliable biometric characteristic over the period of a lifetime. This proposed work provides comparative study of various filters of Wavelet Transforms in terms of size and PSNR of images.
Volume: 3
Issue: 2
Page: 97-102
Publish at: 2014-08-01

A Dynamic Selection Algorithm on Optimal Auto-Response for Network Survivability

10.11591/ijeecs.v12.i8.pp6354-6360
Jinhui Zhao , Yujia Sun , Liangxun Shuo
In the selection process of survival strategies, it is a challenging work to automatically choose the optimal measure for the survival event. A dynamic selection algorithm is proposed, based on feedback control. According to the feature of survival strategy, the strategy model is presented, which includes fuor specific attribute. The dynamic update process of attribute vector is described in detail. Combining the weight of preference and attributes of strategy, the TOPSIS evaluation is employed to select optimal measure. Experiments and analysis show that optimal measure selected by proposed algorithm is appropriate and wishful, which enriches the research content in this field.
Volume: 12
Issue: 8
Page: 6354-6360
Publish at: 2014-08-01

Gear Fault Diagnosis and Classification Based on Fisher Discriminant Analysis

10.11591/ijeecs.v12.i8.pp6198-6204
Haiping Li , Jianmin Zhao , Xinghui Zhang , Hongzhi Teng , Ruifeng Yang
Gears are the most essential parts in rotating machinery. So gear fault modes diagnosis and levels classification are very important in engineering practice. This paper present a novel method in gear fault recognition and identification using Fisher discriminant analysis (FDA) due to FDA can reduct dimension when analyse signal. The real data collected from a gearbox test rig is used to validate the method this paper proposed. And the effectiveness of the methodology was demonstrated by the results obtained from the analysis. Three kinds of fault modes and levels were identified. And energy was selected as feature parameter. The fault modes (normal, breaktooth and crack) were diagnosed at first, then the fault levels of breaktooth and crack are classified. The accurate rate of the method is approximate 89%.
Volume: 12
Issue: 8
Page: 6198-6204
Publish at: 2014-08-01

Image Segmentation of Adhering Bars Based on Improved Concavity Points Searching Method

10.11591/ijeecs.v12.i8.pp6173-6180
Liu Guohua , Liu Bingle , Yuan Qiujie , Huang Zhenhui
It is difficult to track, count and separate the bars moving at a high speed on production line for their overlap under occlusion. Therefore, it is necessary to establish a reliable, practical splitting mechanism for the adhered bars. This paper proposed a new solution to the problem of bars adhesion: the plane array camera was utilized to acquire the images of moving bars so as to recognize the centroid coordinates of the bars ends and compute their area with a Blob algorithm, two geometric parameters were utilized to detect adhered bars, and the presence of adhered bars was analyzed according to the convex hull. For the adhered bars, the segmentation points were searched using scanning method by a series of the rules to determine the optimal segmentation line. The proposed method can segment the adhered bars effectively with matched concavity points. The experimental results show that the method can well segment and count bars moving at a high speed on production line, with the counting accuracy near to 100% and the recognizing time in millisecond.
Volume: 12
Issue: 8
Page: 6173-6180
Publish at: 2014-08-01

Research of Reliability, Availability and Maintainability on the All-electronic Computer Interlocking System

10.11591/ijeecs.v12.i8.pp5877-5885
He Tao , Ren Jianxin
High levels of reliability and high security are the basic characteristics and requirements of railway signal systems. So, reliability, availability and maintainability (RAM) are necessarily analyzed before the computer interlocking system will be adopted. The All-electronic Computer Interlocking System, which is a new kind of interlocking system, still needs to analyze its RAM before being put to use. In this paper, the reliability methods and Markov model are adopted to analyze the RAM indexes of the All-electronic Computer Interlocking System when its execution layer equipped with the single configuration or the dual-redundant configuration, the paper also compares the indexes with that of the traditional computer-based interlocking system. Finally, the paper will briefly include suggestions on how the All-electronic Computer Interlocking System’s RAM indexes may be increased and also, how the system may be used practically.
Volume: 12
Issue: 8
Page: 5877-5885
Publish at: 2014-08-01

Downscaling Modeling Using Support Vector Regression for Rainfall Prediction

10.11591/ijeecs.v12.i8.pp6423-6430
Sanusi Sanusi , Agus Buono , Imas S Sitanggang , Akhmad Faqih
Statistical downscaling is an effort to link global scale to local scale variable. It uses GCM model which usually used as a prime instrument in learning system of various climate. The purpose of this study is as a SD model by using SVR in order to predict the rainfall in dry season; a case study at Indramayu. Through the model of SD, SVR is created with linear kernel and RBF kernel. The results showed that the GCM models can be used to predict rainfall in the dry season. The best SVR model is obtained at Cikedung rain station in a linear kernel function with correlation 0.744 and RMSE 23.937, while the minimum prediction result is gained at Cidempet rain station with correlation 0.401 and RMSE 36.964. This accuracy is still not high, the selection of parameter values for each kernel function need to be done with other optimization techniques.
Volume: 12
Issue: 8
Page: 6423-6430
Publish at: 2014-08-01

Advances on Low Power Designs for SRAM Cell

10.11591/ijeecs.v12.i8.pp6063-6082
Labonnah Farzana Rahman , Mohammad F. B. Amir , Mamun Bin Ibne Reaz , Mohd. Marufuzzaman , Hafizah Husain
As the development of complex metal oxide semiconductor (CMOS) technology, fast low-power static random access memory (SRAM) has become an important component of many very large scale integration (VLSI) chips. Lot of applications preferred to use the 6T SRAM because of its robustness and very high speed. However, the leakage current has increasing with the increase SRAM size. It consumes more power while in standby condition. The power dissipation has become an importance consideration due to the increase integration, operating speeds and the explosive growth of battery operated appliances. The objective of this paper is to review and discuss several methods to overcome the power dissipation problem of SRAM. Low power SRAM can be produced with improvement in term of power dissipation during the standby condition, write operation and read operation. Discharging and charging of bit lines consumes more power during write ‘0’ and ‘1’compared to read operation. One of the methods to produce low power SRAM design is with make modification circuit at a standard 6T SRAM cell. This modification circuit will help to decrease power dissipation and leakage current. Several method was discussed in this paper for understand the method to produce low power design of SRAM cell. Recommendations for future research are also set out. This review gives some idea for future research to improve the design of low power SRAM cell.
Volume: 12
Issue: 8
Page: 6063-6082
Publish at: 2014-08-01

Dynamic Modeling Process of Neuro Fuzzy System to Control the Inverted Pendulum System

10.11591/ijeecs.v12.i8.pp6153-6163
Tharwat O. S. Hanafy , Mohamed K Metwally
The analysis and control of complex plants often requires the principles of qualitative process models since quantitative, namely analytical process models are not available. Qualitative modeling is one promising approach to the solution of difficult tasks automation if qualitative process models are not available. This contribution presents a new concept of qualitative dynamic process modeling using so called Dynamic Adaptive Neuro fuzzy Systems. This yields the framework of a new systems theory the essentials of which are given in further section of the paper. First, an identification method is presented, using a combination of linguistic knowledge.
Volume: 12
Issue: 8
Page: 6153-6163
Publish at: 2014-08-01

Application Research based on Artificial Fish-swarm Neural Network in Sintering Process

10.11591/ijeecs.v12.i8.pp6127-6133
Song Qiang , Wang Ai-Min , Li Hua
Sinter tumbler strength is an important parameter in the sintering process, and has an important influence on the performance of finished sinter. Artificial fish swarm algorithm have good ability to acquire the global performance, the neural network has strong nonlinear ability and local optimization performance,; AFSA+BP algorithm combined with artificial fish swarm algorithm and BP algorithm, realizes the complementary artificial fish swarm algorithm global search capability and BP algorithm's local optimization combination of performance, an artificial fish swarm neural results show that the network combination algorithm, it is shown that comparing with the traditional BP neural network forecasting method,the presented forecasting method has better adaptive ability and can give better forecasting results.The artificial fish—swarm algorithm network is trained and checked with the actual production data.this algorithm has strong generalization capability, predictive accuracy improved significantly, and speed up the convergence rate, provides an effective method for strength prediction. Which be used for off-line learning and prediction, a good basis for the online application.
Volume: 12
Issue: 8
Page: 6127-6133
Publish at: 2014-08-01

Small-world and Scale-free Features in Harry Potter

10.11591/ijeecs.v12.i8.pp6411-6416
Zhang Jun , Zhao Hai , Xu Jiu-qiang , Wang Jin-fa
Harry Potter is a series of seven fantasy novels which has got a huge success. To explore the reasons of so successful of the novel behind, we analyzed the characters network in Harry Potter from the perspective of complex networks. Studies show that the characters network in Harry Potter has got the small-world effect and scale-free feature. It is a typical complex network. The success of novel Harry Potter is precisely due to the complex properties of it, and this may give some guidance for novel writers when preparing their works.
Volume: 12
Issue: 8
Page: 6411-6416
Publish at: 2014-08-01
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