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Wei Wang,Mingyi He,Huan Zhang,Yatang Dai 한국자기학회 2016 Journal of Magnetics Vol.21 No.2
In this paper, 10 nm Fe₃O₄ nanoparticles were modified on the surface of 2 μm flower-like bismuth oxychloride (BiOCl) spheres by a facile co-precipitation method. The results showed that the Fe₃O₄/BiOCl nanocomposites exhibited excellent photocatalytic activity and superparamagnetic property (Ms = 3.22 emu/g) under visible light for Rhodamine B (RhB) degradation. Moreover, the Fe₃O₄-BiOCl photocatalyst possessed magnetic recyclable property, which could maintain high photocatalytic effective even after 20 cycle times. These characteristic indicates a promising application for wastewater treatment.
Farid Muhammad Imran,Mingyi He,Yifan Zhang 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.9
Hyperspectral Image processing is usually time consuming, due to its huge data size. Nowadays Hyperspectral Imaging is used in many fields where real-time solutions are required. A systemic comparison study of linear feature extraction methods for classification of hyperspectral images with various types of noises is carried out in this paper, in which the performance of different linear feature extraction methods for classification and their computation cost reduction are compared. In practice, hyperspectral images are often contaminated by different types of noises, as the atmosphere around hyperspectral cameras may change all the time. In this paper, to make it more realistic, different types of noises, including Salt-and-Pepper noise, Gaussian noise, Speckle noise and their mixtures, are artificially imposed on the hyperspectral image. Support Vector Machine based classification is employed for classification performance comparison. The experimental results are very helpful for selecting linear feature extraction methods for classification of hyperspectral images that are usually affected with noises.
Farid Muhammad Imran,Mingyi He 보안공학연구지원센터 2015 International Journal of Hybrid Information Techno Vol.8 No.9
This paper presents a new technique for marker selection called marker selection using skeletonization. Markers are the most reliable pixels that represent a particular class. Marker selection using skeletonization is further analysed to do classification of hyperspectral image with very low training samples, as low as one pixel per class. Both spatial and spectral information are used to improve the final classification accuracy. An Extended Morphological Profile with duality is used to extract spatial information. Furthermore, it is shown that by using the spatial and spectral information with non- parametric supervised feature extraction methods, better classification accuracy can be achieved even when very low training samples are available. The classification maps will be shown and discussed for very low training sample analysis using marker selection by skeletonization technique.
An Essential Role for 14-3-3 Proteins in Brassinosteroid Signal Transduction in <i>Arabidopsis</i>
Gampala, Srinivas S.,Kim, Tae-Wuk,He, Jun-Xian,Tang, Wenqiang,Deng, Zhiping,Bai, Mingyi-Yi,Guan, Shenheng,Lalonde, Sylvie,Sun, Ying,Gendron, Joshua M.,Chen, Huanjing,Shibagaki, Nakako,Ferl, Robert J. Elsevier 2007 DEVELOPMENTAL CELL Vol.13 No.2
<P><B>Summary</B></P><P>Brassinosteroids (BRs) are essential hormones for plant growth and development. BRs regulate gene expression by inducing dephosphorylation of two key transcription factors, BZR1 and BZR2/BES1, through a signal transduction pathway that involves cell-surface receptors (BRI1 and BAK1) and a GSK3 kinase (BIN2). How BR-regulated phosphorylation controls the activities of BZR1/BZR2 is not fully understood. Here, we show that BIN2-catalyzed phosphorylation of BZR1/BZR2 not only inhibits DNA binding, but also promotes binding to the 14-3-3 proteins. Mutations of a BIN2-phosphorylation site in BZR1 abolish 14-3-3 binding and lead to increased nuclear localization of BZR1 protein and enhanced BR responses in transgenic plants. Further, BR deficiency increases cytoplasmic localization, and BR treatment induces rapid nuclear localization of BZR1/BZR2. Thus, 14-3-3 binding is required for efficient inhibition of phosphorylated BR transcription factors, largely through cytoplasmic retention. This study demonstrates that multiple mechanisms are required for BR regulation of gene expression and plant growth.</P>