This paper addresses stability problem for a class of networked controlsystems (NCSs) with network attacks. As a network attack to controlsystems, denial-of-service attacks are fully taken into account in the NCSs m...
详细信息
This paper addresses stability problem for a class of networked controlsystems (NCSs) with network attacks. As a network attack to controlsystems, denial-of-service attacks are fully taken into account in the NCSs modelling. Under the scenario that there exist denial-of-service attacks in the communication channel, a closed-loop system with an error function is provided for the studied NCSs, where the denial-of-service attacks are well considered. Then based on the above constructed system model, one sufficient condition is derived for ensuring the uniformly ultimately boundedness of the derived system under consideration, and the upper bound of the maximum allowable number of denial-of-service attack is obtained. Moreover, the celebrated time-delay system technology method is introduced to improve the result of the upper bound of the maximum allowable number of denial-of-service attack. Finally, one numerical example is given to show the effectiveness of the proposed method.
Combining sliding mode control method with radial basis function neural network (RBFNN), this paper proposes a robust adaptive control scheme based on backstepping design for re-entry attitude tracking control of near...
详细信息
This paper studies the distributed filtering problem of sensor networks, where a set of heterogeneous sensing nodes is required to estimate the state of a linear discrete-time dynamic system in a collaborative manner....
详细信息
ISBN:
(纸本)9781467374439
This paper studies the distributed filtering problem of sensor networks, where a set of heterogeneous sensing nodes is required to estimate the state of a linear discrete-time dynamic system in a collaborative manner. Due to limited sensing range and communication constraints, just part of sensors can get observations of the process and a consensus based sub-optimal filtering algorithm is designed. The convergence properties of the estimation error covariance is further studied, and a necessary and sufficient convergence condition is provided based on LMIs. This condition shows that the convergence of the algorithm requires the target node in the extended topology of network is globally reachable and each sensing node is observable to the process. Simulation examples are given to illustrate the results.
Disrupting the circadian rhythms will cause health problems such as sleep disorders, memory disorders and obesity. Finding the suitable external stimulation to synchronize a model with a desired phase is a biologicall...
详细信息
ISBN:
(纸本)9781467374439
Disrupting the circadian rhythms will cause health problems such as sleep disorders, memory disorders and obesity. Finding the suitable external stimulation to synchronize a model with a desired phase is a biologically significant issue. The phase control of circadian rhythms for Drosophila is considered from controlengineering viewpoint in this paper. If all parameters of the model are known, we can use the feedback linearization to design a tracking controller for the phase ***, in practice, parameters uncertainties always exist. To deal with this problem, a slide-mode controller is proposed for the phase tracking control of circadian rhythms. The simulation results show the effectiveness of the proposed method.
A novel method for nonlinear time-varying systems identification based on multi-dimensional Taylor network and variable forgetting factor recursive least squares algorithm is proposed. In this paper, the connection we...
详细信息
Using the pseudo-generalized Hamiltonian method, this paper investigates the decentralized nonlinear robust coordinated control of multiple static synchronous compensators(STATCOMs) in multi-machine multiload power sy...
详细信息
ISBN:
(纸本)9781509009107
Using the pseudo-generalized Hamiltonian method, this paper investigates the decentralized nonlinear robust coordinated control of multiple static synchronous compensators(STATCOMs) in multi-machine multiload power systems. First,the uncertain nonlinear differential algebraic equation model is constructed for the power system. Then, the dissipative pseudogeneralized Hamiltonian realization of the system is established by means of variable transformation and prefeedback ***, based on the obtained dissipative pseudo-generalized Hamiltonian realization, a new-style decentralized nonlinear robust coordinated controller is put forward. Simulation results demonstrate the effectiveness and robustness of the control scheme.
With the addition of heating in thermal power *** to lack of guidance for heating scheduling in traditional scheduling mode,it has been unable to satisfy the current costs for energy conservation and saving of thermal...
详细信息
ISBN:
(纸本)9781467397155
With the addition of heating in thermal power *** to lack of guidance for heating scheduling in traditional scheduling mode,it has been unable to satisfy the current costs for energy conservation and saving of thermal power *** load distribution(especially heat load dispatch) is an important subject in the operation optimization of a thermal power *** model of heat load dispatch on the condition of economic power dispatch is established and linear programming for optimized heat load distribution among units based on LINGO is *** average distribution and linear programming distribution are contrasted in a thermal power *** is obviously shown by simulation and calculation that linear programming distribution gets more optimal results than current average *** has important significance to reduce energy consumption and save costs.
Radio Frequency Identification(RFID) technology has shown its potential in the field of indoor positioning in recent years,and has been widely used in large establishments such as the airport lobby,supermarkets,librar...
详细信息
ISBN:
(纸本)9781467397155
Radio Frequency Identification(RFID) technology has shown its potential in the field of indoor positioning in recent years,and has been widely used in large establishments such as the airport lobby,supermarkets,libraries,underground parking and so ***,the complexity of the indoor environments make positioning a challenging problem in terms of accuracy,stability,reliability,and interference *** this paper,we develop an algorithm of passive RFID indoor positioning based on interval Kalman filter,according to the geometric constraints of responding tags,combined with the target motion *** interval Kalman filter is adopted to integrate target position of one preceding time point and reference tags position to estimate the current *** of this algorithm is to use passive tags to reduce hardware costs,and on the other hand the introduction of filtering algorithm improves the positioning accuracy.
Type 2 diabetes (T2D) is a heterogeneous disease that develops through diverse pathophysiological processes and molecular mechanisms that are often specific to cell type. Here, to characterize the genetic contribution...
Type 2 diabetes (T2D) is a heterogeneous disease that develops through diverse pathophysiological processes and molecular mechanisms that are often specific to cell type. Here, to characterize the genetic contribution to these processes across ancestry groups, we aggregate genome-wide association study data from 2,535,601 individuals (39.7% not of European ancestry), including 428,452 cases of T2D. We identify 1,289 independent association signals at genome-wide significance (P < 5 × 10) that map to 611 loci, of which 145 loci are, to our knowledge, previously unreported. We define eight non-overlapping clusters of T2D signals that are characterized by distinct profiles of cardiometabolic trait associations. These clusters are differentially enriched for cell-type-specific regions of open chromatin, including pancreatic islets, adipocytes, endothelial cells and enteroendocrine cells. We build cluster-specific partitioned polygenic scores in a further 279,552 individuals of diverse ancestry, including 30,288 cases of T2D, and test their association with T2D-related vascular outcomes. Cluster-specific partitioned polygenic scores are associated with coronary artery disease, peripheral artery disease and end-stage diabetic nephropathy across ancestry groups, highlighting the importance of obesity-related processes in the development of vascular outcomes. Our findings show the value of integrating multi-ancestry genome-wide association study data with single-cell epigenomics to disentangle the aetiological heterogeneity that drives the development and progression of T2D. This might offer a route to optimize global access to genetically informed diabetes care.
This article deals with the problem of driving a family of second-order nonlinear agents to land on a sphere and formation tracking a set of given orbits on the sphere.A novel geometric extension called the concentric...
详细信息
ISBN:
(纸本)9781467397155
This article deals with the problem of driving a family of second-order nonlinear agents to land on a sphere and formation tracking a set of given orbits on the sphere.A novel geometric extension called the concentric compression method is proposed to give a solution to spheral landing and then combines with the control of spherical meridian and parallel to achieve formation motion along given orbits on the *** asymptotic stability of system is proved by Lyapunov-based method when the communication topology is *** effectiveness of the analytical result is verified by a numerical simulation.
暂无评论