Du D.,Information Technology PR |
Qi B.,Shanghai University |
Fei M.,Shanghai University |
Wang Z.,Shanghai University
Information Sciences | Year: 2016
Traditional analysis and design for networked control systems (NCSs) with state quantization have been investigated under single wired/wireless network environment. This paper studies the quantized control of distributed event-triggered NCSs under hybrid wired-wireless networks environment. Unlike the most existing NCSs, the controller communicates with distributed sensors through multiple wired-wireless channels and the measured signals from sensors might suffer from communication constraints of hybrid wired-wireless networks, which makes the quantized control of distributed event-triggered NCSs more complex. To reduce the communication burden of each channel, a distributed event-triggered mechanism and multiple quantization scheme are firstly proposed. The communication characters of hybrid wired-wireless networks are then analyzed, which are described by different Markov chains. Furthermore, a novel system model is presented, and a sufficient condition of the stochastic stability is derived. The relationship between the system stability criteria and the maximum hybrid wired-wireless network-induced delays, the event-generators parameters and multiple quantization parameters is established. Finally, simulation results confirm the effectiveness and feasibility of the proposed method. © 2016 Elsevier Inc.
Xiang L.,Jiangnan University |
Xie L.,Jiangnan University |
Liao Y.,Information Technology PR |
Ding R.,Jiangnan University
Mathematical and Computer Modelling | Year: 2010
This paper presents an auxiliary model based hierarchical least squares algorithm to estimate the parameters of single-input multi-output system modelling by combining the auxiliary model identification idea and the hierarchical identification principle. A numerical example is given to show the performance of the proposed algorithm. © 2010 Elsevier Ltd.
Andryieuski A.,Technical University of Denmark |
Zhukovsky S.V.,Technical University of Denmark |
Zhukovsky S.V.,Information Technology PR |
Lavrinenko A.V.,Technical University of Denmark
Optics Express | Year: 2014
We numerically investigate the influence of roughness in layer thicknesses on the properties of hyperbolic metamaterials (HMMs). We show that random spatial variation of dielectric and metal layer thicknesses, similar to what occurs during actual structure fabrication, leads to dramatic absorption increase compared to an ideal, smooth-layer HMM; the absorption increases more strongly when roughness is induced throughout the HMM rather than in its surface layer only. Hence, we have found that moderate surface roughness does not deteriorate the HMM functionality, at least in absorption-related applications, thus eliminating the challenge of ultrasmooth metal layer fabrication. More severe roughness can also prove useful in the design of inexpensive HMM-based broadband absorbers. © 2014 Optical Society of America.
Drozdov A.A.,Information Technology PR |
Sukhorukov A.A.,Australian National University |
Kozlov S.A.,Information Technology PR
International Journal of Modern Physics B | Year: 2014
We model propagation of initially single-cycle wave packet exhibiting paraxial spatial diffraction in a homogeneous isotropic dielectric medium with normal group velocity dispersion and instantaneous cubic nonlinearity. We show that for higher input intensity, the number of field oscillations is increased and the temporal spectrum shifts to shorter wavelengths in the axial beam part and to longer wavelengths at the periphery of the beam, and this is accompanied by the formation of closed surfaces of equal phase. We find that at tripled frequencies a minimum of spectral density forms at low spatial frequencies, which is characteristic for single-cycle pulses. At higher spatial frequencies, the maximum of the spectral density shifts to quadruple temporal frequencies. © 2014 World Scientific Publishing Company.
Jing T.,Nanjing University of Aeronautics and Astronautics |
Chen F.,Nanjing University of Aeronautics and Astronautics |
Zhang X.,Information Technology PR
Neurocomputing | Year: 2016
In this paper, finite-time lag synchronization of time-varying delayed complex networks is investigated. By designing a periodically intermittent feedback controller and adjusting periodically intermittent control strengths with the updated laws in two parts respectively, we achieve finite-time lag synchronization between two time-varying delayed complex networks. In addition, based on the same finite-time stability theory and the same sliding mode control, we ensure that the trajectory of error system converges to a chosen sliding surface within finite time and remains on it forever. Finally, two examples are given to demonstrate the effectiveness and correctness of the theoretical results obtained here. © 2016.
Stumpf S.A.,Information Technology PR |
Korolev A.A.,Information Technology PR |
Kozlov S.A.,Information Technology PR
Journal of Physics: Conference Series | Year: 2013
The paper reports results of computer simulation of strong light beam propagation in dielectric media in case of plasma generation. We investigate an extra-broadening of radiation spectrum to a 'violet' wing of visible range. We show that the resulting pulse spectrum is represented by sequence of well-separated maximums, broadening as propagation distance increases. Experimental data are compared with simulation results, showing a good mutual correspondence of spectral representations. © Published under licence by IOP Publishing Ltd.
Stepanov O.A.,Information Technology PR |
Vasilyev V.A.,Concern CSRI Elektropribor
IFAC Proceedings Volumes (IFAC-PapersOnline) | Year: 2014
The recurrence algorithms for the Cramer-Rao lower bound for a discrete-time nonlinear filtering problem in the conditions when a forcing noise, measurement errors and initial covariance matrix depend on the state vector to be estimated are derived. It is assumed that the state vector being estimated includes a subvector of time-invariant unknown parameters. Some examples are given to illustrate the applicability of the algorithms obtained. © IFAC.
Nikolaeva T.,Information Technology PR |
Petrov N.,Information Technology PR
Journal of Physics: Conference Series | Year: 2014
This paper is devoted to the numerical study of density fluctuations of scattering particles suspended in a volume of the optical medium. Two spatial distributions were considered: random distribution and normal distribution. As a result of statistical processing of the focused images of scattering particles normalized distributions of density in the image plane, which characterize the fluctuations in the volume of the optical medium were obtained. © Published under licence by IOP Publishing Ltd.
PubMed | Information Technology PR
Type: | Journal: The journal of physical chemistry letters | Year: 2017
A bismuth-based organohalide material, methylammonium bismuth iodide (MA