Yongfang Liu

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This paper investigates the problem of finite-time formation control formulti-agent systemswith general linear dynamics. First of all, the considered formation problem is converted into the motion planning problem,where the systems are steered from initial positions to the desired terminal configurations. Then, by using Pontryagin maximum principle, an(More)
OBJECTIVE The Centers for Disease Control and Prevention (CDC) has developed an approach to ventilator-associated events (VAE) surveillance. Using these methods, this study was performed to investigate VAE incidences and to test whether VAEs are associated with poorer outcomes in China. DESIGN A 4-month, prospective multicenter surveillance study between(More)
This paper studies the distributed average tracking problem for multiple time-varying signals generated by linear dynamics, whose reference inputs are nonzero and not available to any agent in the network. In the edge-based framework, a pair of continuous algorithms with, respectively, static and adaptive coupling strengths are designed. Based on the(More)
Epoxyeicosatrienoic acid (EET) has wide applications due to the unique biological effects of anti‑hyperlipidemia, inhibition of platelet aggregation, anti‑inflammation, anti‑cancer, anti‑lipid oxidation and the promotion of brain tissue development. The present study investigated whether EET ameliorates cerebral ischemia‑reperfusion injury (CIRI) by(More)
This paper studies the finite-time leader-following tracking problems for a group of autonomous agents modeled by second-order nonlinear dynamics under a dynamic reference leader. First, based on distributed binary measurements, a class of finite-time leader-following tracking algorithms are only requiring a single-bit quantization error relative to each(More)
This technical note addresses the distributed fixed-time consensus protocol design problem for multi-agent systems with general linear dynamics over directed communication graphs. By using motion planning approaches, a class of distributed fixed-time consensus algorithms are developed, which rely only on the sampling information at some sampling instants.(More)
In this paper, a distributed average tracking problem is studied for Lipschitz-type nonlinear dynamical systems. The objective is to design distributed average tracking algorithms for locally interactive agents to track the average of multiple reference signals. Here, in both the agents’ and the reference signals’ dynamics, there is a nonlinear term(More)