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24,092 Article Results

The Optimization of Finishing Train Based on Improved Genetic Algorithm

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3413
Hongxia Liu , Xin Chen , Rongyu Li
The central issue of finishing train is that we should distribute the thickness of each exit with reason and determine the rolling force and relative convexity. The optimization methods currently used are empirical distribution method and the load curve method, but they both have drawbacks. To solve those problems we established a mathematical model of the finishing train and introduced an improved Genetic Algorithm. In this algorithm we used real number encoding, selection operator of a roulette and elitist selection and then improved crossover and mutation operators. The results show that the model and algorithm is feasible and could ensure the optimal effect and convergence speed. The products meet the production requirements. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.3892
Volume: 12
Issue: 5
Page: 3555-3559
Publish at: 2014-05-01

An Optimization Model of Coal Allocation in a Group

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3435
Jianjian Zhao , Yunhua Gan , Xiaoqian Ma , Zeliang Yang
The frame of an optimization model of coal alloction in a power generation group was introduced in present study. The influence of multi-coals blending and transportation were all considered in the model. Firstly, the impact of each process of coal using on the cost of power generation and boiler safety in the combustion process were analyzed, and the detailed mathematical descriptions were given. A multi-coals blending mathematical model based on safty, environmental protection and cost was proposed. The optimization model of coal transportation in the power generation group to achieve the most benefit was established. The algorithms of these models were studied and found that the genetic algorithm is one of the suitable methods to solve the models. An optimaiztion system for the coal allocation in the power generation group was developed based on the models and algorithms. The system adopts friendly software structure and can provide personalized functions for the power generation group and power plants. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.5107
Volume: 12
Issue: 5
Page: 3728-3736
Publish at: 2014-05-01

Acoustic Source Localization Based on Iterative Unscented Particle Filter

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3456
Jie cao , Jia-qi Liu , Di Wu , Jin-hua Wang
To solve the problem of tracking an acoustic source in noise and reverberation environment, a new method is proposed in pursuit of higher accuracy. First, this paper improves the unscented particle filter, which can add the latest measurement information to optimize the proposal distribution. Then, the likelihood function is constructed by calculating the microphone arrays’ output energy in the framework of the improved algorithm. Finally, the experiment results indicate that the proposed localization method can not only improves the accuracy of location estimation, but also can enhance the ability to resist noise and reverberation in the acoustic source localization system. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4816
Volume: 12
Issue: 5
Page: 3902-3910
Publish at: 2014-05-01

A Reference Compensation Current Control strategy for Grid-Connected Inverter of Three-Phase Distributed Generators

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3417
Yunqing Zhang , Shaoru Zhang , Pingjun Wang , Lijun Wang , Ruiye Zhang , Xiaobo Liu , Lingling Liu , Yuanyuan Wu
Renewable energy resources (RES) are being increasingly connected in distribution systems by utilizing power electronic converters. However, the extensive use of power electronics has resulted in a rise in power quality (PQ) concerns faced by the utility. A novel control strategy implementing reference compensation current was proposed in this paper. So that these grid-connected inverters can achieve maximum benefits when they were installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to transfer active power from RES to the grid, and 2) load reactive power demand support; 3) current harmonics compensation at PCC; and 4) current unbalance and neutral current compensation in case of 3-phase 4-wire system. Moreover, with adequate control of grid-interfacing inverter, all the four objectives can be accomplished either individually or simultaneously. Simulation and experimental results show the validity and capability of the novel proposed control strategy. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4918
Volume: 12
Issue: 5
Page: 3586-3594
Publish at: 2014-05-01

Intelligent Network Temperature and Humidity Measuring System Based on USB Interface

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3445
Zhiguo Huang , Zhixin Huang , Xihe Cui , Shengli Han
Multi digital output relative humidity and temperature sensors-SHT71 were set network monitoring points in the system, which can measure at any moment, timing, real-time temperature and relative humidity per point of the environment by-turn. Temperature-humidity value, dew-point value, date and time per point were displayed by lattice graphics LCM (Liquid Crystal Display Module) HY-12864K. At the same time, they were saved in nonvolatile FRAM (Ferroelectric Random Access Memory) FM31256, which can assure data do not lose after the power of the system fail. Acquired data can be uploaded directly to PC in the USB-HOST mode or be copied indirectly to PC far away from testing field by flash disk in the USB-DEVICE mode. The application software not only can draw temperature, humidity and dew-point curve and calculate maximum, minimum, average, but also can make further statistical analysis, report forms printing and set-up basic measure parameters of the system. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.5114
Volume: 12
Issue: 5
Page: 3805-3810
Publish at: 2014-05-01

Nonlinear Robust Control Approach Based on Integrity

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3392
Chen Jinli , Xue Yali , Liu Xingang
A kind of Nonlinear Robust Control (NRC) approach based on integrity for multivariable systems is presented. It uses model estimator which provides the approximate model information to compensate the non-modeled dynamics, system uncertainties, and external disturbances of a system. Firstly, the existence of NRC with integrity is examined. Then, stable regions of each NRC’s parameters are calculated, and some parameters are obtained by placing suitable closed-loop poles, for meeting the design specifications of the whole control system. The proposed method is applied to two illustrative examples from literature. Results demonstrate that NRC is feasible and robust for complicated multivariable systems. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4926
Volume: 12
Issue: 5
Page: 3366-3380
Publish at: 2014-05-01

An Effective Iris Recognition System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3395
Hsiau Wen Lin , Hwei Jen Lin , Yue Sheng Li , Fu-Wen Yang
An iris recognition system uses the iris to distinguish the identity of a person using the rich iris texture feature. To effectively remove noise and precisely segment the stable iris region is a crucial stage prior to recognition. Most noises on iris images are caused by occlusion of eyelids or eyelashes in certain areas. In this paper, we propose an iris recognition system which precisely locates and segments iris regions. We extract the iris feature from a relatively reliable portion of the iris region using a DoG filter. Experimental results show that the proposed iris recognition system has satisfactory results in terms of time efficiency and recognition rate. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4951
Volume: 12
Issue: 5
Page: 3399-3406
Publish at: 2014-05-01

Power System Planning and Analysis Data Model Research

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3424
Zhanfeng Cao , Jian Zhang , He Hao , Xinghua Zhou
Power system planning is according to the demand of the social and economic development, energy resources and load distribution, determine the reasonable power structure and strategy. Power grid voltage grade, transmission mode and reasonable space truss structure, etc. Although a large number of literature have studied various aspects of the power planning, but there are few literatures on power system planning comprehensive study, and just theoretical analysis, useless for practical application. This paper analyzes the load forecasting of power system planning, evaluation of power grid and economic evaluation, gives the basic data needed for the analysis and calculation,and provides theoretical guidance for the actual planning work. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.5112
Volume: 12
Issue: 5
Page: 3642-3648
Publish at: 2014-05-01

A Kind of H2/H∞Filtering Sheme on Deformation Monitoring Data

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3389
Chengman Sha , Yachun Mao , Dongmei Yang
Based on the research of the Kalman filter, a kind of H2/H∞filter is put forward which depends on the model. H2 filter assumes that the noise is white noise, but does not require the statistical properties, also ignores color noise. H∞ filter only considers the non-white and energy- limited noise. It can ensure the accuracy of the filter in worst frequency point, but doesn’t consider the influence of white noise. Synthesizing the advantages and disadvantages of H2 and H∞ filter scheme, H2/H∞hybrid filter devide the noise into the white noise and non-white noise of limited energy. Baed on norm analysis about the noise and system, the optimization index J is adopted as the optimization goal, and its physical meaning is given. The hybrid filter is designed by solving the corresponding Riccati Equation, the simulation and actual calculation example are given. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4935   
Volume: 12
Issue: 5
Page: 3338-3347
Publish at: 2014-05-01

An Adaptive All-odd transformation Watermark Scheme

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3481
Qiaomei Ma , Lijun Wu , Jianhong Du , Gouxi Chen , Qiuxiang Yang
Combining discrete wavelet transform, human visual system, chaotic map and odd-even quantization, a novel watermarking scheme for 2D images is proposed in this paper. Encrypted watermarking and identity information are imperceptibly embedded in 2D images according to this scheme. For improving the accuracy of just noticeable distortion and enhance robustness of algorithm, the model adaptively adjusts the threshold intensity by adding weighting factor and strengthening the brightness sensitivity calculation method of just noticeable distortion. The bijection relationship is constructed between the image coefficients and watermarking bits by the way of all-odd transformation to the just noticeable distortion, so the scheme realizes blind extraction of watermark. The experimental results and analysis show that the proposed scheme can resist intentional or unintentional variety of attacks and have superiority comparing with existing schemes. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4228
Volume: 12
Issue: 5
Page: 4107-4114
Publish at: 2014-05-01

One-pass Moment Algorithm for Graphical Primitives

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3447
Zhiyong Ju , Chunmei Su
Moment is a useful tool in character and drawing recognition. As the moment computation is time-consuming, the main aim in this area is to develop a fast algorithm. The commonly-used method is the discrete Green’s theorem, which transforms the double summation into a summation on region contour. An improved discrete Green’s theorem proposed in this paper, which removes the constraint on parity pairing, thus extends its validity in applying the algorithm to complex regions. The contour tracing is fulfilled by a boundary-tracing-automation, and the central moments for graphical primitives are computed by one-pass scanning algorithm, the calculation of the moment is greatly simplified DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.5099
Volume: 12
Issue: 5
Page: 3818-3824
Publish at: 2014-05-01

Based on Weighted Gauss-Newton Neural Network Algorithm for Uneven Forestry Information Text Classification

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3479
Yu Chen , Liwei Xu
In order to deal with the problem of low categorization accuracy of minority class of the uneven forestry information text classification algorithm, this paper puts forward the uneven forestry information text classification algorithm based on weighted Gauss-Newton neural network, on the basis of weighted Gauss-Newton algorithm, the algorithm is proved via singular value decomposition principle. The experimental result shows that the algorithm has higher classification accuracy of majority class and minority class than algorithm of common classification. The algorithm expands a new method for the research on the uneven forestry information text classification algorithm. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4388
Volume: 12
Issue: 5
Page: 4091-4100
Publish at: 2014-05-01

Visualization Analysis of Dynamic Evolution of the Theme in Improvisation Studies

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3385
Peng-bin Gao , Weiwei Wu , Bo Yu
The field of improvisation is composed of a multiplicity of topics leading to a vast array of management literature. However, the research does not provide a chronological picture of the topics it addresses, making it difficult to develop an overview of the evolution and trends in the literature. To address this issue, co-word analysis was employed to reveal patterns and trends in the improvisation field by measuring the association strengths of keywords of relevant documents. Data were collected from Web of Knowledge database for the period 1997-2012. Using the co-occurrence matrix of keywords, the results of multivariate statistical techniques show that the improvisation research involves many fields including innovation, strategy, learning, change, leadership, metaphor, entrepreneurship, capability.In order to trace the dymamic changes of the improvisation field, the whole period was further separated into three periods: 1997-2002, 2003-2007 and 2008-2012. The strategic diagram and social network analysis was used to trace the dynamic changes of the improvisation research, and results show that improvisation field has some established research themes and it also changes rapidly to embrace new themes. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4927
Volume: 12
Issue: 5
Page: 3303-3312
Publish at: 2014-05-01

Quality Abnormal Pattern Recognition of Dynamic Process Based on MSVM

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3418
Yumin Liu , Haofei Zhou , Shuai Zhang
The improvement of the effective recognition of quality abnormal patterns in dynamic process has seen increasing demands nowadays in the real-time monitor and diagnose of automatic manufacturing. Based on the analysis of the dynamic process of quality abnormal pattern, this paper presents a recognition model of quality abnormal pattern recognition using a Multi-SVM. Contrasting with performance of recognition model based on different kernel functions, suitable kernel functions were selected for the recognition model. Furthermore, we have contrasted the model proposed in this paper with the model adopted by Vahid. Simulation results show that the recognition model proposed in this paper has very high recognition accuracy for all patterns, and the overall average recognition accuracy is 97.78%. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4919
Volume: 12
Issue: 5
Page: 3595-3602
Publish at: 2014-05-01

Design of a Grating Generator for Three-dimensional Scanner

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/3419
He Xingzheng
In the three-dimensional scanners (3D scanners) based on structured-light technology, the commercial video projector was always borrowed to act as the electronic grating generator, which is a key hardware to the device. But there were some defects existed. For example, the size was too large for setting in the case of the device, and it could not be controlled by a single chip microprocessor conveniently, etc.. To solve these problems, a new grating generator was designed. The gratings were numbered and encoded in computer instructions, and then a complex programmable logic device (CPLD) chip was used to control a liquid crystal on silicon (LCOS) video chip, to write its data ports directly corresponding to the instructions. It has small size, simple interfaces, prompt response, clear instructions, and it worked well. DOI : http://dx.doi.org/10.11591/telkomnika.v12i5.4920
Volume: 12
Issue: 5
Page: 3603-3608
Publish at: 2014-05-01
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