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Saint Petersburg, Russia

ITMO University , former Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, abbreviated as SPbNRU ITMO, is a Russian technical university located in St. Petersburg, Russia. It trains specialists in cutting-edge technologies directed at science and technical development. The university is awarded a National Research University category in 2009. It belongs to the list of top 15 Russian universities included in the government program of improving international competitiveness among leading research and educational centers.Today, ITMO University has over 13,000 students, 30 academic departments and about 1000 teaching staff. The main university campus is on Kronverkskiy Prospect, 49.University scientific interests are concentrated in the fields of information technologies, photonics and optics. Wikipedia.


Petrov M.,Saint Petersburg State University of Information Technologies, Mechanics and Optics
Physical Review A - Atomic, Molecular, and Optical Physics | Year: 2015

In this paper we report on a numerical study of plasmonic nanoparticle chains with long-range dipole-dipole interaction. We have shown that introduction of positional disorder gives a peak in the density of resonant states at the frequency of individual nanoparticle resonance. This peak is referred to as Dyson singularity in one-dimensional disordered structures and, according to our calculations, governs the spectral properties of local density of states. This provides disorder-induced Purcell enhancement that can find applications in random lasers and for surface-enhanced Raman-scattering spectroscopy. We stress that this effect relates not only to plasmonic nanoparticles but also to an arbitrary chain of nanoparticles or atoms with resonant polarizabilities. © 2015 American Physical Society. Source


Oreshnikov I.,Saint Petersburg State University | Driben R.,University of Paderborn | Yulin A.V.,Saint Petersburg State University of Information Technologies, Mechanics and Optics
Optics Letters | Year: 2015

The effect of mutual interaction between second-order soliton and dispersive waves (DWs) is investigated. It is predicted analytically and confirmed numerically that DWs (both transmitted and reflected components) become polychromatic after interaction with the soliton. Collision with DWs of considerable intensity can lead to acceleration/deceleration and central frequency shift of the soliton, while still preserving the soliton's oscillating structure. Two second-order solitons with resonant DWs trapped between them can form an effective solitonic cavity with "flat" or "concave mirrors," depending on the intensity of the input. © 2015 Optical Society of America. Source


Oreshnikov I.,Saint Petersburg State University | Driben R.,University of Paderborn | Yulin A.V.,Saint Petersburg State University of Information Technologies, Mechanics and Optics
Optics Letters | Year: 2015

The effect of mutual interactions between dark solitons and dispersive waves is investigated numerically and analytically. The condition of the resonant scattering of dispersive waves on dark solitons is derived and compared against the results of the numerical simulations. It is shown that the interaction with intense dispersive waves affects the dynamics of the solitons by accelerating, decelerating, or destroying them. It is also demonstrated that two dark solitons can form a cavity for dispersive waves bouncing between the two dark solitons. The differences of the resonant scattering of the dispersive waves on dark and bright solitons are discussed. In particular, we demonstrate that two dark solitons and a dispersive wave bouncing in between them create a solitonic cavity with convex "mirrors," unlike the concave "mirror" in the case of bright solitons. © 2015 Optical Society of America. Source


Sizikov V.S.,Saint Petersburg State University of Information Technologies, Mechanics and Optics
International Journal of Artificial Intelligence | Year: 2015

Further development of the new version of a posteriori choosing (NVAC) the regularization parameter α in the Tikhonov regularization method is performed. Refined lemmas and theorems on the error and the convergence rate of the regularized solution using its sourcewise representability are proved. A numerical example is given. © 2015 by IJAI (CESER PUBLICATIONS). Source


Bobtsov A.A.,Saint Petersburg State University of Information Technologies, Mechanics and Optics | Pyrkin A.A.,Institute for Problems of Mechanical Engineering
International Journal of Adaptive Control and Signal Processing | Year: 2012

In this paper, a new approach for cancelation of a multiharmonic disturbance is proposed. Compared with a number of known results in this paper, the disturbance cancelation problem is solved when the output variable is measured only, a relative degree of the plant is arbitrary and the control channel has delay. The numerical example is presented to illustrate the theoretical result. The reaction wheel pendulum on a movable platform is considered as the plant to demonstrate that the proposed approach is realizable and can be plugged in practice. The second goal is the development of mechatronic applications for use in education. Copyright © 2011 John Wiley & Sons, Ltd. Source

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