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- 저자 : Jingqi Fu (검색결과 3 건)
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Output-based Security Control of NCSs Under Resilient Event-triggered Mechanism and DoS Attacks
Lisai Gao,Jingqi Fu,Fuqiang Li 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.4
This paper studies the output-based security control of networked control systems under resilient eventtriggered mechanism (RETM) and periodic denial-of-service (DoS) attacks. Firstly, using attack period and sleepinginterval of jammer, an output-based resilient event-triggered mechanism is introduced, which can save system resources despite DoS attacks. Secondly, a switched system model is built, which integrates impacts of the RETM andDoS attacks in a unified framework. Thirdly, using piecewise Lyapunov functional approach, exponential stabilitycriteria are obtained, which establish quantitative relationships among the RETM, DoS attacks, sampling periodand exponential decay rate. Further, sufficient conditions for co-designing the RETM and output-based securitycontroller are presented. Finally, example confirms effectiveness of the proposed method.
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Event-triggered Output Feedback Resilient Control for NCSs under Deception Attacks
Lisai Gao,Fuqiang Li,Jingqi Fu 제어·로봇·시스템학회 2020 International Journal of Control, Automation, and Vol.18 No.9
This paper studies event-triggered output feedback resilient control for networked control systems (NCSs) under stochastic deception attacks following a Bernoulli distribution. Unlike continuous event-triggered mechanism (ETM) requiring dedicated hardware and complex Zeno-avoidance computation, an output-based discrete ETM is firstly introduced, which overcomes limits of continuous ETM and relaxes state-available constraint. Secondly, a novel time-delay system model is established, which makes it possible to study effects of the ETM, stochastic attacks and network-induced delays in a unified framework. Thirdly, less-conservative asymptotic stability criteria with desired H∞ index are obtained, which derive quantitative relationships among the ETM, stochastic attacks, network delays, plant and resilient controller. Further, sufficient conditions to co-deign the ETM and resilient controller are presented. Finally, examples confirm effectiveness of the proposed method.
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Zhendi Wang,Zhuo Zuo,Lu Li,Suping Ren,Tianchang Gao,Jingqi Fu,Yongyong Hou,Yanyan Chen,Jingbo Pi 대한약학회 2020 Archives of Pharmacal Research Vol.43 No.3
White adipocytes play a key role in maintainingwhole body energy homeostasis by forming white adiposetissue (WAT). The impairment of WAT formation or WATdysfunction is clearly associated with severe metabolic disorders. Mature adipocytes are derived from differentiatedpreadipocytes and are pivotal in energy storage and metabolism. Nuclear factor erythroid 2-related factor 2 (Nrf2) isa member of a family of CNC-bZIP proteins which exerttheir transcriptional control on genes harboring antioxidantresponse elements (ARE) in partnership with smallmusculoaponeurotic fibrosarcoma proteins. The activationof Nrf2-ARE coordinated by specific repressor Kelch-likeECH-associated protein 1 (Keap1) regulates networks ofgenes controlling diverse homeostatic processes involvingadaptive antioxidant response and detoxification amongmany other adaptive responses. Interestingly, accumulatingevidence indicates that Nrf2 may act as a transcription factorin regulating the formation and function of adipose tissues,including adipogenesis, lipid metabolism and insulin sensitivity. In this mini-review, an overview on the distinct rolesof Nrf2 in adipocytes is provided. While highlighting the regulatory role of Nrf2 in adipogenesis, recent key findingson Nrf2 in insulin signal transduction and energy metabolismof adipocytes are also summarized.
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