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Hyperspectral Image Classification by Fusion of Multiple Classifiers
Yanbin Peng,Zhigang Pan,Zhijun Zheng,Xiaoyong Li 보안공학연구지원센터 2016 International Journal of Database Theory and Appli Vol.9 No.2
Hyperspectral image mostly have very large amounts of data which makes the computational cost and subsequent classification task a difficult issue. Firstly, to solve the problem of computational complexity, spectral clustering algorithm is imported to select efficient bands for subsequent classification task. Secondly, due to lack of labeled training sample points, this paper proposes a new algorithm that combines support vector machines and Bayesian classifier to create a discriminative/generative hyperspectral image classification method using the selected features. Experimental results on real hyperspectral image show that the proposed method has better performance than the other state-of-the-art methods.
LingLi Zhang,Weizhi Wang,XIAOYONG PAN 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.4
Single-walled carbon nanotubes (SWCNTs) with incovalently attached iodine, were obtained byphysical absorption. The di®erent diameter sizes of SWCNTs, with di®erent numbers of iodinemolecule, enhance the density contrast between them which becomes evident in density gradientultracentrifugation (DGU) targeted to sort certain species of SWCNTs. The results of opticalabsorbance and photoluminescence emission showed that iodine-assisted DGU preferentiallyseparates semiconducting nanotubes with certain diameters [(6, 5), (7, 5), (8, 4), and (7, 6)].Wehave applied these semiconducting, species enriched SWCNTs to prepare solution-processed ¯elde®ect transistor (FET) devices with random nanotube network active channels. The devicesexhibit stable p-type semiconductor behavior in air with very promising characteristics. The on-o® current ratio reaches up to 2 ? 10 4 within a narrow window of voltage ( ? 10 V to 10 V), andestimated hole mobility of 21.7 cm2V? 1 s? 1 .
Manifold Sparse Coding Based Hyperspectral Image Classification
Yanbin Peng,Zhijun Zheng,Jiming Li,Zhigang Pan,Xiaoyong Li,Zhinian Zhai 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.12
Hyperspectral image classification has received an increasing amount of interest in recent years. However, when representing pixels as vectors, the dimensionality of feature space is high, which causes “curse of dimensionality” problem. In this paper, in order to alleviate the impact of above problem, a manifold sparse coding method is proposed. Firstly, matrix decomposition technique is used to find a concept set and calculates relative data projection in the concept set. Secondly, manifold learning regularization is imported into objective function to capture the intrinsic geometric structure in the data. Finally, LASSO regularization is used to obtain sparse representation of data projection. Experimental results on real hyperspectral image show that the proposed method has better performance than the other state-of-the-art methods.
Zhang, Jinglan,Shi, Xiaomin,Li, Yehua,Kim, Beom-Jun,Jia, Junling,Huang, Zhiwei,Yang, Tao,Fu, Xiaoyong,Jung, Sung Yun,Wang, Yi,Zhang, Pumin,Kim, Seong-Tae,Pan, Xuewen,Qin, Jun Elsevier 2008 Molecular cell Vol.31 No.1
<P><B>Summary</B></P><P>Sister chromatid cohesion is normally established in S phase in a process that depends on the cohesion establishment factor Eco1, a conserved acetyltransferase. However, due to the lack of known in vivo substrates, how Eco1 regulates cohesion is not understood. Here we report that yeast Eco1 and its human ortholog, ESCO1, both acetylate Smc3, a component of the cohesin complex that physically holds the sister chromatid together, at two conserved lysine residues. Mutating these lysine residues to a nonacetylatable form leads to increased loss of sister chromatid cohesion and genome instability in both yeast and human. In addition, we clarified that the acetyltransferase activity of Eco1 is essential for its function. Our study thus identified a molecular target for the acetyltransferase Eco1 and revealed that Smc3 acetylation is a conserved mechanism in regulating sister chromatid cohesion.</P>