1,411 research outputs found
On the solution of trivalent decision problems by quantum state identification
The trivalent functions of a trit can be grouped into equipartitions of three
elements. We discuss the separation of the corresponding functional classes by
quantum state identifications
Broad spectral line and continuum variabilities in QSO spectra induced by microlensing of diffusive massive substructure
We investigate the variability of the continuum and broad lines in QSO
spectra (particularly in the H line and continuum at 5100 \AA
) caused by microlensing of a diffuse massive structure (like an open star
cluster). We modeled the continuum and line emitting region and simulate a
lensing event by a star cluster located in an intervening galaxy. Such a type
of microlensing event can have a significant influence on magnification and
centroid shift of the broad lines and continuum source. We explore
relationships between the continuum and broad line flux variability during the
microlensing event.Comment: 19 pages, 11 figure
Kinematic differences between NLS1 and BLAGN sources
It is well-known that the higher policyclic aromatic hydrocarbon (PAH)
abundance, lower black hole mass, higher accretion rate and lower luminosities
are among the major characteristics of Narrow-Line Seyfert galaxies (NLS1),
when they are compared to Broad line Seyfert galaxies (BLS1). NLS1s may be
normal Seyfert galaxies at an early stage of evolution, their black holes may
still be growing and/or they could be special for some other reason. In this
work we discuss the findings that NLS1s have most of line and continuum
luminosities correlated with FWHM(H), which may be the trace of their
rapid black hole mass grow. BLS1 do not show such trends. Also, PAHs may be
destroyed as the black hole grows and the starbursts are removed, for NLS1
objects.Comment: Revisiting narrow-line Seyfert 1 galaxies and their place in the
Universe - NLS1 Padov
Discretization of control law for a class of variable structure control systems
A new method for the discretization of a class of continuous-time variable structure control systems, based on the linear complementarity theory, is proposed. The proposed method consists two steps. In the first step, the motion projected on the sliding manifold (the fast dynamics) is discretized by means of backward Euler time-step method. In the second step, the sampled and hold control law is determined such that the trajectories of the discrete-time closed loop system projected on the sliding manifold coincide with the trajectories of discretized fast dynamics. The discrete-time closed-loop system exhibits discrete-time sliding motion. It means that the trajectories of the discrete-time closed loop system reach the sliding manifold in a finite number of steps and stay on it after that. Also, it is proved that control law is a continuous function. Therefore, the closed loop system is chattering free. The theoretically obtained results are verified on the example of the non-holonomic integrator. \u
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