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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 93 Documents
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Search results for , issue "Vol 11, No 10: October 2013" : 93 Documents clear
Optimization and Construction of Single-side Nuclear Magnetic Resonance Magnet Ji Yongliang; He Wei; He Xiaolong
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

Single-sided NMR devices can operate under conditions inaccessible to conventional NMR while featuring portability and the ability to analyze arbitrary-sized objects. In this paper, a semi-elliptic Halbach magnet array was designed and built for single-side Nuclear Magnetic Resonance (NMR). We present an easy-to-implement target field algorithm for single-side NMR magnet design based on Gram-Schmidt Orthogonal method. The creating magnetic field of designed magnet structure could achieve best flatness in the region of interesting for NMR applications. The optimizing result shows that the best magnet structure can generate magnetic fields which flatly distributed in the horizontal direction and the gradient was distributed in the vertical direction with gradient of 2mT/mm. The field strength and gradient were measured by a three dimensions Hall probe and agreed well with the simulations. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3460  
An Image Sparse Representation for Saliency Detection Jun Yang; Tusheng Lin; Xiaoli Jin
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

This paper presents a novel method for detecting saliency in static images based on image sparse representation. For each color channel, first, the image is partitioned into non-overlapping patches and each patch is represented by the way of sparse coding from a learned dictionary of patches from natural scenes. Then, global saliency and local saliency are calculated and fused to attain saliency of each patch. Local saliency is shown by popping out a patch from its surrounding patches. Global saliency is indicated by the rarity of a patch in the overall patches of the image. The final saliency map is attained by normalizing and fusing local and global saliency maps of all color channels. Experimental results in the benchmark image dataset demonstrate that the proposed method achieves a superior performance compared with most of state-of-the-art methods. Furthermore, both robustness and the low computational complexities make the presented algorithm feasible for subsequent applications. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.2791
Study on Application of Quantum BP Neural Network to Curve Fitting Zhixia Zhang; Yanchang Liu; Jianping Xie
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

Based on the Quantum mechanics in a Quantum phase-shifted door and two negates controlled both general door, using them as the basic unit composed of activation function neural Network, this paper puts forward a Quantum state with input and output of the Quantum neuron Quantum state model and three layers of Quantum BP neural Network model of Network learning algorithm and performance to carry on the thorough study. Experimental results show that compared with BP neural Network, QBP appears quickly learn and convergent effect, with better fitting ability than the BP neural Network. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3388 
Analysis on the Key Parameters of Aerospace Microminiaturization Decelerator Xiangyang Jin; Jianyuan Feng; Lili Zhao
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

A high efficiency special transmission decelerator is designed by scheme design, structural design, optimization design, and return difference analysis and computer simulation. Small teeth difference transmission with the first level bevel gear pair and the second level beveloid gear pair is adopted as the form of transmission in the decelerating system. Great torque and big bending moment are available by transmission ratio formula deduction, force analysis and strength analysis. The particle swarm optimization and the genetic algorithm have been combined and the mutation operator optimization model has been proposed to optimize the design of decelerator. Then the transmission with large transmission ratio, high torque, high power and high precision will be realized in small space. This model has solved the problems of particle swarm optimization in mechanical design. For example, there are more variables, it is constrained and it is easily precocious. This model has provided the theoretical basis for the optimum design of microminiaturization gear system. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3399
An Experimental Study on the Driving System of Vibratory Feeding Liang Han; WeiZhong Wu; YinHang Bian
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

This paper describes the development of vibratory transmission system, and concentrates on its driving technology. Vibratory feeder is used to transfer parts from one place to another by vibration which plays an important role in assembly automation. Decoupled vibratory feeder (DVF) is a novel feeder which can be excited in two mutual perpendicular directions. In decoupled vibratory feeder system (DVFS), vibration angle, frequency and waveform of driving signals can be easily adjusted in software way, as well as the phase angle between vertical vibration and horizontal vibration, so DVFS has a great superiority. Up to now, two DVFS prototypes have been successfully developed, but the driving technology cannot meet the demands of parts’ smooth moving. The electromagnet, the core of the drive system, should be optimized in its external dimensions and drive performance. And we fabricate a series of electromagnets. To test electromagnet performance, a test system has been designed. Presently, two researches on the electromagnet driving circuit have been made in our laboratory. One method is to receive analog signal from D/A output, then drive electromagnet through power amplifier. The other method actually is to use a switching circuit controlled by PWM technology. In this paper, we used the latter method in the test system and control system. The author makes experience about influencing factors of the electromagnetic force and gets some data. Also, the controller has greatly improved the performance of vibratory feeder. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3415
Research on an Improved Wireless Sensor Networks Clustering Protocol Zheng-Qiu Lu; Lin-Ge Wang; Jin Shan
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

Energy consumption of clustering routing protocol is one of the exigent problems needs to solve in wireless sensor networks. Aiming at the uneven energy consumption and unreasonable cluster heads selection in LEACH protocol, a new clustering routing protocol is proposed in this paper including number of cluster heads, cluster head choosing algorithm and network topology. Finally we give some analysis and comparison between the improved protocol and other two protocols, and the results show that the improved protocol can increase node energy-efficiency and prolong network survival lifetime. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3431 
The Evolution of Dual-Wavelength Dissipative Soliton in Yb-Doped Fiber Lasers Yanyan Zhang; Qiang Li
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

Dual-wavelength dissipation soliton (DS) in the all-normal-dispersion ytterbium-doped fiber laser (YDFL) is reported. Using a phase-shift long period fiber grating (PS-LPFG) as an all-fiber format spectral filter in the laser cavity, self-starting dual-wavelength pulses are obtained by nonlinear polarization evolution (NPE). The mode-locking mechanism of the ANDi cavity with different central wavelengths has analyzed. Experimental results show that the NPE together with the PS-LPFG play key roles in the generation of the dual-wavelength, meanwhile, a switchable dual-wavelength mode-locked fiber laser can achieve through change the polarization of the cavity. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.2961
An Optimal Routing Strategy Based on Specifying Shortest Path Yonghua Xu; Fei Shao
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

Unlike the shortest path is randomly chosen in the traditional shortest path routing strategy, a novel routing strategy to improve the network transportation capacity is proposed in this paper. According to the different characteristics of the nodes along actual paths, we specify the shortest paths of all pairs of nodes aiming at reducing the betweenness of those high-betweenness nodes. Simulations on both computer-generated and real-world networks show that the new routing strategy can enhance the network transportation capacity greatly. And it works better in those networks with the fuzzy community structure. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.2963
Application of ERPs to Evaluation of Clothing Comfort through physiological signals LIU Yunjuan; CHEN Dongsheng
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

Based on analyzing domestic and foreign literatures concerning event-related potential research, this paper analyses the theory of comfort of wearing by using ERPs. This paper makes a summary of what comfort evaluation for wearing using ERPs, Finally propose the research direction in this domain of identifying from EEG the nerve reflection related to special feeling and neurocognitive events, for the purpose of using impersonal metrics to evaluate subjective feelings of clothing comfort and then provide a new method for designing clothing to be more comfortable. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3345 
Solar Electric Bicycle Body Modeling and Simulation Zhikun Wang
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

A new solar electric bicycle design and study were carried out on in this paper. Application of CAD technology to establish three-dimension geometric model, using the kinetic analysis on the frame and other parts for numerical simulation and static strength analysis for the vehicle model design, virtual assembly, complete frame dynamics analysis and vibration analysis, with considering other factors, first on the frame structure improvement, second on security of design calculation analysis and comparison, finally get the ideal body design. DOI: http://dx.doi.org/10.11591/telkomnika.v11i10.3410 

Page 6 of 10 | Total Record : 93

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