Guang Yuan Zhang

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Recommended by Guang Zhang This paper studies the existence and global asymptotical stability of periodic PC-mild solution for the T-periodic logistic system with time-varying generating operators and T 0-periodic impulsive perturbations on Banach spaces. Two sufficient conditions that guarantee the exponential stability of the impulsive evolution operator(More)
Social relationships such as friendship and partner choice are ruled by the proximity principle, which states that the more similar two individuals are, the more likely they will become friends. However, proximity, similarity, and friendship are concepts with blurred edges and imprecise grades of membership. This study shows how to simulate these friendship(More)
Copyright q 2010 Chang-you Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. We study the global asymptotic stability of the equilibrium point for the fractional difference equation(More)
In this paper we regard legged locomotion (e.g., running) as adaptive vibration, which is capable of adapting to changes in internal parameters and in the external environment. We propose control concepts for such adaptive running in general, and present a theoretical study of the bounding locomotion of a quadruped robot according to the proposed control(More)
A real sequence {x k } is said to be (*)-monotone with respect to a sequence {p k } and a positive integer σ if x k > 0 and (−1) n ∆ n (x k − p k x k−σ) ≥ 0 for n ≥ 0. This paper is concerned with the existence of (*)-monotone solutions of a neutral difference equation. Existence criteria are derived by means of a comparison theorem and by establishing(More)
The present study aimed to investigate the clinical outcomes of percutaneous transhepatic biliary drainage in patients with obstructive jaundice and identify potential predictors of patient survival. Clinical data from 102 patients (66 males and 36 females; median age, 63.50 years; range, 29-84 years) with a mean (± standard deviation) pre-drainage serum(More)