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24,092 Article Results

An Improved Evolutionary Algorithm with New Genetic Operation for Optimization Problem

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3365
Wang Jiekai , Hu Ruikai , Wang Chao
An improved evolutionary algorithm (SCAGA) is proposed in this paper for solving optimization problem. In order to control genetic operations in an effective range, the new algorithm regulate both of the crossover probability and mutation probability with the iteration process. In addition, SCAGA presents a new crossover strategy that restricts the cross of the chromosomes to some extent to protect good genes schema. We also perform the schema theorem on the algorithm process to analyze the working mechanism of SCAGA, and we conclude that the new algorithm is effective. According to experiment results for some test functions and TSP problems, SCAGA have a high performance in both constrained an unconstrained optimization problems. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4785 
Volume: 12
Issue: 4
Page: 3148-3157
Publish at: 2014-04-01

A Novel Data Mining Algorithm for Mathematics Teaching Evaluation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3304
Gang Wang
AbstractWith relative theory about technology of datamining and recommender model of user’s interest, this paper presents the methodof MWFP-TREE based on the combination between recommender model idea of user’sweight and the minimum weighted FP-TREE method. Compared to traditional method,this method does not only carry out dimension reduction of raw data to improvethe efficiency of a constructing tree but it also performs association rulemining and improves mining effect. This method is applied to mathematics  teaching evaluation in one university and it findsout different evaluations from different students respectively consideringstudents’ information and teachers’ information while it is not similar totraditional thought which is only to perform mining direction based onteachers’ information. Towards mining regulations and results, it providessignificant referential values for objectivity of teaching evaluation andteaching directions. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4809
Volume: 12
Issue: 4
Page: 2658-2666
Publish at: 2014-04-01

CLF Based Stabilization of Chaos in PMSM with Uncertain Parameters

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3305
Chuansheng Tang , Yuehong Dai , Hua Sun
The robust stabilization problem of chaos suppression for permanent magnet synchronous motors (PMSM) drive system is investigated in presence of parametric uncertainties. Based on control Lyapunov function (CLF) approach, a new state feedback controller is designed to realize the state of the system globally asymptotically stable. The stability of the proposed control scheme is verified via Lyapunov stable theory. Finally, simulation results illustrate the effectiveness of the presented method. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4096
Volume: 12
Issue: 4
Page: 2667-2676
Publish at: 2014-04-01

Low Leakage Circuits Design with Optimized Gate-length Biasing

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3293
Yangbo Wu , Xiaohui Fan , Haiyan Ni , Jianping Hu
With the technology process scaling, leakage power dissipation is becoming a growing number of percentage in total power dissipation. This study presents a new method in the gate-length biasing technique to achieve a cost-effective gate-length with a most benefit between leakage reduction and delay increasing. With the optimized gate-length, typical combinational and sequential circuits are realized and simulated using HSPICE with the BSIM4.6.4 predictive models at a 45nm COMS process. The results show that leakage currents of typical combinational circuits reduce more and delay increase less. Moreover, leakage currents of mirror adder and transmission gate adder decrease 13.9% and 8.90%, respectively; and leakage power of 4-bit binary counters using C2MOS D Flip-Flop and Transmission-Gate D Flip-Flop reduce 38.36% and 20.05%, with the frequency of 5M, respectively. Therefore, the optimized gate-length biasing technique is an attractive approach in low power circuits design. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4791
Volume: 12
Issue: 4
Page: 2565-2573
Publish at: 2014-04-01

Performance Evaluation of Dynamic Load Balancing Algorithms

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3328
Tianshu You , Wenhui Li , Zhiyi Fang , Hongbin Wang , Guannan Qu
Efficient task scheduling mechanism can better meet the users’ QoS requirement, and achieve the load balancing in physical hosts, so the cluster system with high scalability and reliability can effectively improve the information utilization of the system, thereby enhance the overall performance of the Web server cluster system. In order to build a network service system with better scalability and reliability, this paper describes the round-robin scheduling algorithm of LVS cluster system, least-connection scheduling algorithm, weighted least-connection scheduling algorithm and a prior proposed new weighted value assigned scheduling algorithm, dynamic adaptive feedback load balancing strategy. Meanwhile, it takes simulation experiment for the round-robin scheduling algorithm of LVS, least-connection scheduling algorithm, weighted least-connection scheduling algorithm and the new weighted value assigned scheduling algorithm, dynamic adaptive feedback load balancing strategy and take comparative analysis for the experimental data, through the analysis and assessment, effectively point out the advantages and disadvantages of the existing load balancing strategy. It is conducive to better improve the existing equalization algorithm performance deficiencies and propose optimum load balancing strategy DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4731
Volume: 12
Issue: 4
Page: 2850-2859
Publish at: 2014-04-01

Recognition Based on Metric-optimized Neighborhood Preserving Embedding

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3294
Bo Chen , Ye Zhang
Face recognition is a biometric technology with great developable potential. It has a great deal of potential applications in public security and information security. To overcome the problem in the high-dimensional face data processing, the k-nearest neighbors is chose by Linear Discriminate Analysis (LDA). A Metric-optimized is proposed for Neighborhood Preserving Embedding (MONPE).MONPE algorithm, with the dimensions of data reduced by LDA, will be reasonable in NPE algorithm. On the other hand, LDA maximizes the between-class scatter and minimizes the within-class scatter, so the neighbors of a sample will have higher possibility to be picked from the same class .With the ORL face database and the Yale database, the recognition rate and run time is compared among NPE, MONPE and CLMONPE. The simulation results show that CLMONPE has obvious advantage in application DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4825 
Volume: 12
Issue: 4
Page: 2574-2581
Publish at: 2014-04-01

Adaptive Wallis Filter via Sparse Recognition for Automatic Control Points Extraction

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3360
Leilei Geng , Deshen Xia , Quansen Sun , Kai Yuan
With the rapid development of the remote sensing satellite, the size and the resolution of satellite images grow increasingly. The evaluation of remote sensing image quality requires precise information of control points extracted from unevaluated images and reference images. Therefore, we propose an adaptive Wallis filter method based on sparse recognition to increase the number of control points and improve the matching precision. Firstly, feature vectors of images are constructed by computing the image radiation-parameters. Secondly, the classification of sub-region terrain in the image can be determined using sparse recognition. Finally, according to specific type of sub-region terrain, we enhance the regions by the Wallis filter based on corresponding filter parameters and extract control points which would lead to the automatic evaluation for geometric precision. The experiments show that the proposed method can get better results especially in the detail on the images of Resourse-3 satellite, hence can increase the number and improve accuracy of control points. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4781
Volume: 12
Issue: 4
Page: 3105-3117
Publish at: 2014-04-01

Applying SVM for Foot Pressure Pattern Classification

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3316
Pan Wentao , Peng Zhaoqin , Caochun Li Bo
An automatic loading simulation and testing system of steering servo was designed in this paper. Design of hardware and software of the testing system were illustrated, and the Load testing principle and test strategy were analyzed. Torque servo motor was used to simulate the loading added to the steering servo. The torque magnitude was controlled proportional to the angular displacement of the steering servo to simulate elastic load. Fuzzy PID control algorithm was used to make torque servo motor follow the change of angular displacement quickly and accurately. The effectiveness of the automatic testing system was proved by the experimental results. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4277
Volume: 12
Issue: 4
Page: 2753-2761
Publish at: 2014-04-01

0.345 Attenuation Law of Vibration Signals During Caving

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3296
Xu Li , Tao Gu
To study on the characteristics of the vibration signals of coal and stone hitting the armor plate during caving, a hybrid algorithm based on first order forward difference and wavelet transform modulus-maxima method is presented which can be used in the longwall top coal face. First, in order to reduce the noise interference, the pre-processing of the vibration signals is done by the first order forward difference method. Second, the wavelet transform modulus-maxima method is used to analyze the resluts of the difference for the post-processing of the data. Finally, attenuation formula is defined in the first-level details (D1). We can learn by the experimental results that the hybrid algorithm provides real-time, high confidence identification of coal and stone by analysis of the first-level details that has approximate 0.345 attenuation law between the wavelet transform modulus-maxima (the maximum coefficient) and the wavelet transform modulus-minima (the minimum coefficient). Because the wavelet transform modulus-maxima’s abscissa and the wavelet transform modulus-minima’s abscissa are adjacent to each other, the concept of Singularity-point Couple(SPC) is defined. Based upon the attenuation law and the defined concept, interference signals can be eliminated, vibration signals can be restored, and some prediction work can be done. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4885
Volume: 12
Issue: 4
Page: 2592-2598
Publish at: 2014-04-01

A novel balanced scorecard design based on fuzzy analytic network process and its application

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3336
Yuhong Cao , You Jianxin
In this paper, wepropose a novel balanced scorecard design based on fuzzy analytic networkprocess and then conduct performance evaluation through a case study. Afteranalyzing the related works about balanced scorecard design and the algorithmof fuzzy analytic network process, we illustrate the improved balancedscorecard design. Firstly, the basic concepts for the balanced scorecardsare introduced. Secondly, four perspectives of the balanced scorecards design are provided.Thirdly, the method to promote the performance of balanced scorecard designthrough the fuzzy analytic network process is demonstrated. In the proposeddesign, a fuzzy number is represented by the left and right formation of eachdegree of membership in fuzzy analytic network process. Furthermore, the degreepossibility for a convex fuzzy number to be larger than a given convex fuzzynumbers can be represented by an effective scheme. Particularly, the basicstructure in the fuzzy analytic network process model is organized hierarchically,and the local weights of the strategies, balanced scorecard perspectives andperformance indicators can be obtained by matrix computing. Finally, a casestudy of college English classroom teaching quantitative evaluation is given todemonstrate the performance of the proposed balanced scorecard design.Experimental results show that the proposed balanced scorecard design is quiteeffective. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4804
Volume: 12
Issue: 4
Page: 2914-2923
Publish at: 2014-04-01

Uncertain Attribute Graph Sub-Graph Isomorphism and its Determination Algorithm

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3348
Yanjun Zhao , Chunying Zhang
The expectative sub-graph isomorphism of uncertain attribute graph is based on the analysis of complex network structure and the characteristic of uncertain attribute graph. The expectative sub-graph isomorphism of uncertain attribute graph is only one threshold value as constraint conditions. The method is simple, but the computation is large amount. Therefore, this paper brings in the definition of sub-graph isomorphism of uncertain attribute graph, and explains the concept.  Then, this paper designs and comes true the algorithm ofsub-graph isomorphism. Finally, through the experiments proves that sub-graph isomorphic is better than expectative sub-graph, and it analyzes the variation in the different threshold cases. The research of sub-graph isomorphism algorithm laid the foundation for uncertain attribute graph sub-graph query and community mining. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4774 
Volume: 12
Issue: 4
Page: 3015-3020
Publish at: 2014-04-01

Detection Algorithm of Airport Runway in Remote Sensing Images

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3319
Zhuzhong Yang , Jiliu Zhou , Fangnian Lang
This article describes a rapid detection method of the airport runway for remote sensing images. The specific algorithm implementation steps are: Firstly, we use the Otsu's method to separate the runway from the images. Then we use the fractional differential gradient operator, which has good anti-noise performance and effective edge extraction ability, to extract the edge information of image, and use automatic threshold to distinguish the edge of runway and other objects. Finally, we use the Hough algorithm to calculate the runway. This detection method of the airport runway, which greatly reduce the data operation and greatly enhance the computing speed, has advantage of good test results and fast speed. This paper shows that, as the study of fractional differential, the application of fractional calculus in a wider area will be successful. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.5000
Volume: 12
Issue: 4
Page: 2776-2783
Publish at: 2014-04-01

Based on the RADIUS and AAA Authentication of the Campus Networks Security System Design and Implementation

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3351
Yuyang Lu , Xiang Zhang Chen , Wenjie Wang , Yong Yang
As the work of digital campus construction, the function of network become more and more important . The kernel of digital campus is fast speed, function formidable, resource widely. The campus network is a special network ,which face special user community ,it is thought ,technology of active, and it adopt access layer access ,so the network security is lower, Vulnerable to illegal users and virus attacks. This text use RADIUS and AAA authentication technology in the campus, through user authentication, strengthen the network access restrictions, the log service, campus network management more systematic and safe. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4776 
Volume: 12
Issue: 4
Page: 3040-3045
Publish at: 2014-04-01

Hardware-in-the-loop Simulation Platform of Photovoltaic Grid-Connected System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3281
Lin FENG , Qing ZHONG , Nanhua YU , Kun WANG , Guojie LI , Kan CHEN
 The modeling and simulation of photovoltaic power generation system has become an important issue in the field of power generation. Research on the characteristics of photovoltaic (PV) grid-connected system by hardware-in-the-loop simulation could provide convenient experiment condition and accurate result. This article designs a photovoltaic grid-connected simulation platform for digital/physical hybrid real-time simulation, in which RTDS uses a digital-to-analog interface to communicate with external DSP devices. Maximum power point tracking (MPPT) and grid-connected control of a 520kWp PV system are performed on the platform. And the feasibility and effectiveness of hybrid PV system are validated by the analysis of hardware-in-the-loop result in RTDS. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4794
Volume: 12
Issue: 4
Page: 2465-2473
Publish at: 2014-04-01

Influence of Non-Integer Harmonics and Interference on SAPF

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3287
Zhang Chao , Ren Zi-Hui , Zhang Yi-Jun , Ma Xiao-Ping
Inter-harmonics and non-periodic disturbance generated by aging SAPF or other reasons would impact SAPF performance. In this paper, three-level SAPF was used as example: the mathematical model of three-level SAPF under the definition of virtual flux was built. The power theory under the definition of CPT was discussed. Based on the definition of CPT, the method for SAPF detection system with CPT was studied and the performance was verified by comparing results with the PQ theory. Repetitive control and PI control were used as a combination system for grid inter-harmonics compensation. EID controller was used to improve the performance of repetitive controller for inter-harmonics and non-periodic disturbance rejection. Finally, system reliability was verified by MATLAB simulation and three-level experiment platform. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4443
Volume: 12
Issue: 4
Page: 2516-2529
Publish at: 2014-04-01
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