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Distributed Reset Control for Leader-following Consensus of Nonlinear Multi-agent Systems
Guanglei Zhao,Hailong Cui,Zhijie Li 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.3
This paper studies the leader-following consensus problem of nonlinear multi-agent systems with directed graph. A distributed reset control protocol that has jumping changes is proposed for the purpose of improving transient consensus performance. First, the case with continuous communication between neighboring agents is considered, and the obtained results are extended to the case with asynchronous sampling, which is more practical under network environment. Then, a hybrid model consisting of both flow dynamics and jump dynamics is constructed for the closed-loop system to deal with different jump dynamics in an unified framework. Based on this model, sufficient conditions are derived for consensus analysis. Finally, numerical examples are presented to testify the effectiveness of theoretical results.
He, Chunlin,Cheng, Guanglei,Zheng, Chengbin,Wu, Li,Lee, Yong-Ill,Hou, Xiandeng The Royal Society of Chemistry 2015 Analytical methods Vol.7 No.7
<▼1><P>Mercury vapor from photo-chemical vapor generation (CVG) was enriched in gold nanorods (AuNRs) for enhancing sensitivity of GF-AAS.</P></▼1><▼2><P>A new and sensitive method is described for the on-line preconcentration and determination of ultra-trace mercury by coupling a trapping scheme based on coating gold nanorods onto the inner wall of the graphite furnace for mercury vapor from photochemical vapor generation (photo-CVG) and graphite furnace atomic absorption spectrometric (GF-AAS) detection. The optimal experimental conditions for the photo-CVG, trapping and atomization were carefully investigated, together with the interference from transition metals. The limit of detection of this method was found to be 0.02 μg L<SUP>−1</SUP> and the precision was better than 5% at 0.1 μg L<SUP>−1</SUP>. Mercury in four spiked water samples and two certified reference materials was successfully determined by the proposed method.</P></▼2>
Yanyan Ren,Hongfeng Li,Guanglei Wu,Le Yang,Chenhui Zheng,LIUDING WANG,Fang Ren,Hui Xing,HONGJING WU 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.2
Al/Fe/Co doped ordered mesoporous carbon (OMC) composites have been synthesized by a facile method, and the influence of dopant on the electromagnetic (EM) and microwave absorption properties was investigated in the frequency range of 2–18 GHz. Compared with Fe/Co– OMC composites, the Al–OMC nanocomposite played a great role in adjusting values and frequency dependence of complex permittivity, which gives rise to significant improved microwave absorption and reduced thickness of the corresponding paraffin wax composites. Reflection loss (RL) values less than -5 dB and -10 dB were obtained in the frequency range of 9.2–18 GHz and 10.7–14.7 GHz with a single thickness of 2.00 mm, respectively. Such enhanced EM wave absorption property of the Al–OMC/paraffin wax composite was ascribed to its superior impedance matching characteristic. Thin thickness, broadband absorption microwave absorbers with Al doped OMC nanocomposites were obtained.
Xingyou Zhang,Bo Chen,Fei Wang,Xin Wang,Yan Cheng,Guanglei Li 대한전기학회 2019 Journal of Electrical Engineering & Technology Vol.14 No.5
Connecting neighbor microgrids into a multi-microgrids system (MMS) is one of research hotspots in the field of microgrids. This paper analyzes difference of distributed generators configuration and load types among each microgrid in a MMS. A method to evaluate the influence of dynamic behaviors and energy exchange behaviors on power supply reliability of microgrids in a MMS is proposed in this paper. A reliability assessment algorithm which takes account of connectivity ability among microgrids and intermittence characteristics of distributed energy, different load type and energy exchange behavior is also proposed in this paper. Since the proposed model can characterize dynamic behavior of microgrids in a MMS, the proposed method is of great significance for design and operation of a MMS.