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作者：Jin, Junyang; Yuan, Ye; Goncalves, Jorge
作者单位：University of Luxembourg; Huazhong University of Science & Technology; University of Cambridge
摘要：Network inference has been attracting increasing attention in several fields, notably systems biology and biomedicine. Indeed, one of our biggest challenges is to uncover and understand complex molecular networks behind cells and organisms. A network is mainly characterized by its topology and internal dynamics. In particular, sparse topologies with stable dynamics are properties present in most real-world networks. Moreover, experiments typically measure a partial set of nodes. Linear systems...
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作者：Ning, Boda; Han, Qing-Long; Zuo, Zongyu
作者单位：Swinburne University of Technology; Swinburne University of Technology; Beihang University
摘要：This article is concerned with bipartite consensus tracking for second-order multiagent systems with signed directed graphs. A time-varying function-based preset-time approach is proposed to realize the convergence in predetermined time. First, a class of time-varying functions with generalized properties are presented. Second, two time-varying function-based auxiliaries and a corresponding manifold are constructed. Under a structurally balanced and strongly connected graph, a time-varying fun...
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作者：Chen, Wei; Wang, Dan; Liu, Ji; Chen, Yongxin; Khong, Sei Zhen; Basar, Tamer; Johansson, Karl H.; Qiu, Li
作者单位：Peking University; Peking University; Hong Kong University of Science & Technology; State University of New York (SUNY) System; Stony Brook University; University System of Georgia; Georgia Institute of Technology; University of Illinois System; University of Illinois Urbana-Champaign; Royal Institute of Technology; University of Melbourne; Lund University; University of Minnesota System; University of Minnesota Twin Cities; University of Hong Kong
摘要：Signed graphs have appeared in a broad variety of applications, ranging from social networks to biological networks, from distributed control and computation to power systems. In this article, we investigate spectral properties of signed Laplacians for undirected signed graphs. We find conditions on the negative weights under which a signed Laplacian is positive semidefinite via the Kron reduction and multiport network theory. For signed Laplacians that are indefinite, we characterize their in...
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作者：Notarnicola, Ivano; Sun, Ying; Scutari, Gesualdo; Notarstefano, Giuseppe
作者单位：University of Bologna; Purdue University System; Purdue University
摘要：We study distributed big-data nonconvex optimization in multiagent networks. We consider the (constrained) minimization of the sum of a smooth (possibly) nonconvex function, i.e., the agents' sum-utility, plus a convex (possibly) nonsmooth regularizer. Our interest is on big-data problems in which there is a large number of variables to optimize. If treated by means of standard distributed optimization algorithms, these large-scale problems may be intractable due to the prohibitive local compu...
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作者：Cao, Xuanyu; Zhang, Junshan; Poor, H. Vincent
作者单位：University of Illinois System; University of Illinois Urbana-Champaign; Arizona State University; Arizona State University-Tempe; Princeton University
摘要：This article studies online stochastic optimization, where the random parameters follow time-varying distributions. In each time slot, after a control variable is determined, a sample drawn from the current distribution is revealed as feedback information. This form of stochastic optimization has broad applications in online learning and signal processing, where the underlying ground-truth is inherently time-varying, e.g., tracking a moving target. Dynamic optimal points are adopted as the per...
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作者：Liu, Tao; Huang, Jie
作者单位：Chinese University of Hong Kong
摘要：In this article, we first establish an exponential stability result for a class of linear switched systems and then apply this result to show the existence of the distributed observer for a discrete-time leader system over jointly connected switching networks. Then, we further develop the adaptive distributed observer for the discrete-time leader system over jointly connected switching networks, which has the advantage over the distributed observer in that, it does not require that every follo...
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作者：Braun, Philipp; Kellett, Christopher M.; Zaccarian, Luca
作者单位：University of Newcastle; Australian National University; Centre National de la Recherche Scientifique (CNRS); Universite de Toulouse; University of Trento
摘要：We propose a constructive design method for linear systems with a nontrivial drift term, guaranteeing robust global asymptotic stability of the origin of the closed-loop system, as well as robust obstacle avoidance. To obtain discontinuous input actions, our controller is designed in the framework of hybrid systems. Using our proposed hybrid controller, we demonstrate that solutions do not enter a sphere, which we term an avoidance neighborhood, around specified isolated points. The constructi...
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作者：Peters, Andres A.; Vargas, Francisco J.; Chen, Jie
作者单位：Universidad Tecnologica Metropolitana; Universidad Tecnica Federico Santa Maria; City University of Hong Kong
摘要：This article provides performance bounds for a particular H-infinity model-matching problem. We consider scalar linear time-invariant plants in a one-degree-of-freedom control loop. We obtained explicit expressions for the Gramians needed when Nehari's theorem is applied to this problem, leading to a simple algebraic equation for the optimal performance. This formula sheds light upon the effect that nonminimum-phase zeros have on the optimal performance and yields easily computable bounds and ...
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作者：Wang, Kai; Chen, Michael Z. Q.
作者单位：Jiangnan University; Nanjing University of Science & Technology
摘要：This article solves the minimal realizability problem of a specific biquadratic impedance with double poles and zeros as a three-reactive-element series-parallel network, where the main conclusion shows that any three-reactive seven-element series-parallel network realizing such a specific biquadratic impedance can always be equivalent to a three-reactive six-element series-parallel network (containing three resistors). First, necessary and sufficient conditions are derived for such biquadrati...
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作者：Zhang, Pengpeng; Liu, Tengfei; Jiang, Zhong-Ping
作者单位：Northeastern University - China; New York University
摘要：This article presents a solution to event-triggered stabilization of a class of nonlinear time-delay systems in the strict-feedback form. Set-valued maps are employed to handle the event-triggered sampling errors, and the closed-loop system is transformed into an interconnection of input-to-state stable subsystems through a set-valued constructive design. The event trigger is designed to satisfy a cyclic-small-gain condition, and the stability of the closed-loop event-triggered system is guara...
