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In this paper, we investigate the synchronization problem for nonlinear coupled networks with time-delay. Nodes in the networks are assumed to be identical and node's dynamical behaviors are described by continuous-time equations. The networks topology is generalized to directed. By introducing an aperiodically intermittent control scheme combined with pinning strategy, some more general sufficient...
In recent years, structural controllability of complex network has aroused great interest. In literatures fruitful results have been achieved on finding the minimum number of driver nodes which guarantee the network structurally controllable. Algorithms for selecting a group of such driver nodes are also proposed. However, for practical applications, it is always desirable to have more possibilities...
Because of complicated pathogenesis and long disease course, COPD (Chronic Obstructive Pulmonary Disease) attracted more and more scholars' attention. Traditional Chinese medicine (TCM) showed obvious effect in treating COPD. However, with so much successful experience, systemic summarization on TCM is still needed. Traditional studies of TCM, based on complex network, ignored the implicit complexity...
The synchronization of multi-weighted complex dynamical networks with fixed and switching topologies is respectively investigated in this paper. Firstly, by putting to use Lyapunov functional approach and some inequality techniques, we establish a synchronization criterion for the multi-weighted complex dynamical network with fixed topology. In addition, the similar methods can be applied to get some...
Shell structure can help us understand the transport properties of the network clearly, and also identify the influential spreaders in complex networks. The robustness of networks suffering shell attacks is a topic of great interest since it is an important issue affecting many real-world networks. We study the robustness of two coupled network systems under shell attack, where multiple support-dependence...
A rumor spreading in a social network or a disease propagating in a community can be described by a contact network whose nodes are persons or centers of contagion and links heterogeneous relations among them. Suppose that a rumor or a disease originating from a single source among a set of suspects spreads in a network, how to root out this rumor/disease source? This problem is important and challenging...
In complex networks, identifying influential nodes is the very important issue, which has a wide range of applications. In this paper, factor analysis method is used to mine the relationships of multiple metric measurements, and then a new evaluation method of node importance in complex networks based on modified technique for order performance by similarity to ideal solution (TOPSIS) approach is...
In modern research the innovation is easy to appear in the multidisciplinary investigation. Understanding the interaction among related scientific research fields is an important problem. In this paper, we analyze the paper data published in IEEE Transactions on Automatic Control (TAC) during the past half century, and construct a field network to disclose the evolution of research fields in IEEE...
Interest point detection is one of the key technologies in image processing and target recognition. This paper presents a new method for detecting interest points in digital images and computer vision problems based on complex network theory. We associate a directed and weighted complex network model to each image and then we propose three different algorithms to locate these key points based on three...
Complex networks with time-varying parameters nodes are of considerable interest in many areas of science, engineering and nature. Reconstructing networks with unknown but bounded time-varying parameters nodes from limited measured information is desirable and of significant interest for using and controlling these networks. Based on the Lasso method and the Taylor expansion approximation, we develop...
The inner coupling faults may occur in a complex network so that the synchronization deteriorates even is destroyed in a complex network. How to synchronize a complex network under the circumstances? Here the inner coupling faults are transformed into the uncertainties of a network. Because the inner coupling faults occur among partial nodes, the inner coupling matrices of fault nodes are different...
This paper studies the state estimation problem for a class of discrete-time nonlinear complex networks. A recursive state estimator is developed by employing the structure of the extended Kalman filter (EKF) with coupling terms. By using the stochastic analysis technique, an upper bound is derived for the coupling strength to guarantee the boundedness of the estimation errors in the mean square sense...
In this paper, the non-fragile state estimation problem is investigated for a class of discrete time-delay nonlinear complex networks with randomly occurring gain variations. Two sequences of random variables obeying the Bernoulli distribution are employed to describe the phenomena of randomly occurring time-varying delays and randomly occurring gain variations. Through stochastic analysis and Lyapunov...
This paper proposes a fault tolerant cooperative control strategy for a class of complex network systems with the time varying interconnection topology. The general neighboring rule-based linear cooperative protocol is developed and a sufficient synchronization condition is derived. Moreover, it is shown that the target point is still reached with the proposed fault tolerant cooperative control method...
The synchronization problem is concerned for a complex network with inner-coupling faults. Firstly, the model of this kind of complex network is established where the inner-coupling faults are presented by a sequence of fault factors. Then the synchronization criteria are derived based on the Lyapunov stability theory and master stability equation method in the form of linear matrix inequalities....
Fault diagnosis of the wind power system is a common problem in the routine maintenance of the wind farm. However, most researches and practical applications focus on separate components, which do not take correlations of different components into consideration. This paper presents a novel two-layer Probabilistic Signed Directed Graph (PSDG) method for the fault diagnosis of the overall wind power...
With the development of economy, logistics becomes more and more important. Logistics efficiency depends on the structure of logistics networks. This paper briefly review the studies about complex networks from perspectives of statistical properties, structural models and application areas. Logistics networks and complex networks have same behavior pattern, so we can apply the theories of complex...
In this paper, we investigate the finite-time cluster synchronization problem for networks with nonlinearly coupled delayed networks of nonidentical delayed dynamic systems. We derive sufficient conditions for finite-time cluster synchronization through a proper controller based on finite-time stability theory. Some numerical examples are then given to illustrate the theoretical results.
In this paper, we respectively discuss passivity of multi-weighted complex dynamical networks with fixed and switching topologies. Firstly, several passivity criteria for the complex dynamical network with fixed topology and multi-weights are established by employing Lyapunov functional approach and inequality techniques. Furthermore, similar methods are used to derive some sufficient conditions for...
The main topic of this paper is the controllability of dynamic complex networks. In our current study, an index is selected for the sake of quantitatively measuring the controllability of networks. The influence of this index is mainly analyzed according to empirical researches on two classes of network structures, for instance, stochastic networks and small-world networks. With such an index, the...
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