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Zhou J.,Zhejiang University | Zhou J.,Shenzhen University | Zhou J.,Shenzhen Key Laboratory of Embedded System Design | Ji Z.,Shenzhen University | And 5 more authors.
2010 Chinese Conference on Pattern Recognition, CCPR 2010 - Proceedings | Year: 2010

A Gabor wavelet based face recognition algorithm of PSOGabor is introduced in this paper. By using particular Gabor filters in feature extraction on important region of face image, PSOGabor can attain more representative feature information with less processing time. To overcome the drawback of overly dependence on the input parameters in intelligent single particle optimizer (ISPO), an improved algorithm of self-adaptive ISPO (AdpISPO) is proposed in this paper. With no critical parameter required, AdpISPO can achieve higher performance than original algorithms. Experimental results demonstrated that, by employing AdpISPO in Gabor filters' selection, PSOGabor can attain higher recognition rate with less computational time. ©2010 IEEE. Source


Zeng Q.-M.,Shenzhen University | Zeng Q.-M.,Shenzhen Key Laboratory of Embedded System Design | Ji Z.,Shenzhen Key Laboratory of Embedded System Design | Li Y.,Shenzhen University | And 3 more authors.
Tien Tzu Hsueh Pao/Acta Electronica Sinica | Year: 2014

This paper proposes an extreme learning machine (ELM) and memetic algorithm (MA) based miniature four-band (0.92/2.4/3.5/5.8GHz) antenna design algorithm namely the AntMA-ELM. It combines a comprehensive learning particle swarm optimizer(CLPSO) based global search and a DSCG(Davies, Swann, and Campey with Gram-schmidt) orthogonalization based local search in the MA framework to form a novel optimization algorithm for the geometrical parameters selection of the antenna. An ELM based regression model is introduced to estimate antenna performance, and accelerate the search speed. Experimental results show that the AntMA-ELM obtains promising performance with short computational time. Particularly, the return losses at all targeted frequency bands are smaller than -10dB. ©, 2014, Chinese Institute of Electronics. All right reserved. Source


Li H.,Xian Jiaotong University | Mou X.,Xian Jiaotong University | Ji Z.,Shenzhen University | Ji Z.,Shenzhen Key Laboratory of Embedded System Design | And 4 more authors.
Chinese Journal of Electronics | Year: 2012

A novel wideband 5.8GHz CPW-fed antenna is presented for Radio frequency identification (RFID) tag. Four U-shaped and four L-shaped branches are used as additional resonators to achieve wideband operation. The proposed antenna was analyzed numerically using the Method of moment (MOM) and the Finite element method (FEM). With the antenna size limited to 30 × 30mm 2, the - 10dB bandwidth obtained by MOM is 3.235GHz (5.765∼9GHz) and the -9.5dB bandwidth obtained by FEM is 2.74GHz (5.32∼8.06GHz), corresponding to 55.7% and 47.2% of the center frequency 5.8GHz respectively. Moreover, the simulated results show that the proposed antenna has gain of more than 4.8dBi and the radiation pattern is nearly omnidirectional in the H-plane. The measured-10dB bandwidth is 2.68GHz (5.63GHz∼8.31GHz), 46.2% of the 5.8GHz frequency. Furthermore, there are three measured resonant frequencies at 1.34GHz, 3.23GHz and 5.8GHz with lower than-10dB return loss respectively. The measurement result achieves a wideband RFID tag antenna performance and is in good agreement with the calculated results. Source


Li H.,Xian Jiaotong University | Mou X.,Xian Jiaotong University | Ji Z.,Shenzhen University | Ji Z.,Shenzhen Key Laboratory of Embedded System Design | And 6 more authors.
Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering | Year: 2012

A novel four-band CPW-fed antenna simultaneously satisfied the requirement for Radio Frequency Identification (RFID) tag and WiMAX /WLAN applications is reported in this paper. Limited to 30×30 mm2 area on a PCBoard with ε r=4.4, the antenna has four U-shaped, two F-shaped and eight L-shaped slots as additional resonators to achieve multi-band operation. Intelligent Single Particle Optimization (ISPO) algorithm is used to determine the optimized slot configuration for the best return loss at 0.96 GHz, 2.5 GHz, 3.76 GHz and 5.8 GHz simultaneously. The performance of the designed antenna was validated through simulations using both the Finite Element Method and the Method of Moment. © 2012 ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering. Source


Zhou J.-R.,Zhejiang University | Zhou J.-R.,Shenzhen University | Zhou J.-R.,Shenzhen Key Laboratory of Embedded System Design | Ji Z.,Shenzhen University | And 6 more authors.
Tien Tzu Hsueh Pao/Acta Electronica Sinica | Year: 2013

A data model namely the approximate repeat vector (ARV) is introduced to describe the similar fragments in DNA sequences.By employing bioinformatics features in data preprocessing, and using ARVs in compression codebook's construction, we propose an asymmetric DNA sequence compression algorithm of biological Lempel-Ziv-Markov chain algorithm 2(BioLZMA-2).The particle swarm optimization (PSO) based memetic algorithm improvement namely the comprehensive learning intelligent particle swarm optimization memetic algorithm (CLIPSO-MA) is employed in the compression codebook's design.Experimental results on benchmark sequences demonstrate better performance of BioLZMA-2 than the original DNA sequence compression algorithms. Source

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