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Histone lysine demethylases in mammalian embryonic development
Hongjie Shen,Wenqi Xu,Fei Lan 생화학분자생물학회 2017 Experimental and molecular medicine Vol.49 No.-
Post-translational modifications, such as methylation, acetylation and phosphorylation, of histone proteins play important roles in regulating dynamic chromatin structure. Histone demethylation has become one of the most active research areas of epigenetics in the past decade. To date, with the exception of histone H3 lysine 79 methylation, the demethylases for all major lysine methylation sites have been discovered. These enzymes have been shown to be involved in various biological processes, with embryonic development being an exciting emerging area. This review will primarily discuss the involvement of these demethylases in the regulation of mammalian embryonic development, including their roles in embryonic stem cell pluripotency, primordial germ cell (PGC) formation and maternal-to-zygotic transition.
Guaranteed Cost Control of Networked Control Systems with DoS Attack and Time-varying Delay
Yeping Shen,Wen-an Zhang,Hongjie Ni,Dan Zhang,Li Yu 제어·로봇·시스템학회 2019 International Journal of Control, Automation, and Vol.17 No.4
This paper is concerned with the guaranteed cost control for a class of networked control systems (NCSs)with denial-of-service (DoS) attack and time-varying communication delay. First, an uncertain switched systemmodel is proposed that is capable of capturing the DoS attack and the short time-varying delay simultaneously. Toachieve the exponential stability with a guaranteed cost performance level, a sufficient condition is derived in termsof matrix inequalities. In our work, the proposed design condition establishes several quantitative relations betweensystem performance and attack parameters. Moreover, the critical value of strong attack frequency is also obtained. Finally, a practical example is given to show the effectiveness of our results.