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A New Bias Field Estimation Method based on Adapted PSO Method
Yunjie Chen,Yingying Chu,Jin Wang,Yuhui Zheng 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.8
It is hard to segmentation brain MR images for the bias fields. In this paper, a new fuzzy anisotropic diffusion function is presented to reduce the effect of the noise. We use Legendre polynomial functions to reconstruct the bias field, which make the entropy of the recovered image be smallest. But it needs to compute a lot of parameters to reconstruct the bias. The traditional method uses the gradient descending method to compute the parameters. The method plunges into local best easily. In order to deal with this problem, Particle swarm optimization (PSO) method is analyzed. A new particle swarm technique is proposed that incorporates initial location information and use mutate operation make the particles away from local maxima. The experiments show that the new method can get accurate result robustly.
On solutions to some nonlinear difference and differential equations
Wei Chen,Pei-Chu Hu,Yingying Zhang 대한수학회 2016 대한수학회지 Vol.53 No.4
In this paper, we study entire solutions of some nonlinear difference equations and transcendental meromorphic solutons of some nonlinear differential equations. Our results generalize the results due to \cite{LK1}, \cite{ZX}.
ON SOLUTIONS TO SOME NONLINEAR DIFFERENCE AND DIFFERENTIAL EQUATIONS
Chen, Wei,Hu, Pei-Chu,Zhang, Yingying Korean Mathematical Society 2016 대한수학회지 Vol.53 No.4
In this paper, we study entire solutions of some nonlinear difference equations and transcendental meromorphic solutons of some nonlinear differential equations. Our results generalize the results due to [11], [17].