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Image Denoising Based on Surface Design Method and Grid Smoothing
Liu Hongping,Chen Mingyi 보안공학연구지원센터 2015 International Journal of Signal Processing, Image Vol.8 No.12
In order to solve the issues like the feature detection algorithm surface design too sensitive to the presence of noise, this thesis proposes the grid processing algorithm. Firstly, the constrained smoothing model is used to smooth the grid, in which the bound terms are the sparse constraint terms of the error term of l2 norm and l1 norm. In the process of smoothing, the points of the smooth location move less, while the there is a greater movement of feature points. And then through the anglicizing the movement distances the initial feature points are extracted; finally, after the generating of the initial feature points, the feature points are more complete. Experimental results show that: the proposed algorithm can handle the noise of too sensitive.
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>