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This paper is devoted to investigation of features that will be the most appropriate for description of high resolution satellite imagery. We developed an image description model which is based on the distribution of image object classes. Proposed model could be used for image similarity estimation.
Nanocrystalline cobalt-zinc phosphates were synthesized co-precipitated, starting from metal sulfates. The color properties in these systems mainly depend upon the preparative method and cation distributions, which have been determined by X-ray powder diffraction using. We observe the influence concentration of cations Co2+ upon the formation and the color development of CoZn phosphate pigments. With...
Bragg waveguide with additional layers between hollow core and periodic cladding is considered. On the base of dispersion equation solutions dispersion diagrams are obtained. The transversal spatial distributions of the electric field intensity are shown. The characteristics of Bragg waveguide respect to additional layer thickness and permittivity are considered. It is shown that increase of additional...
Chlorophyllin heteroassociation with berberine, methylene blue and doxorubicin was investigated by spectrophotometric method. Decomposition of titration spectra of chlorophyllin-ligand systems was fulfilled by multivariate curve resolution — alternative least squares method. It allowed us to determine the concentrations of absorbing particles in solutions and calculate the constants of chlorophyllin...
The influence of the magnetic gradient tomography systems instability on the reconstruction quality is investigated. The simulation circuit of the tomograph was used to calculate the signal of free induction recession from the conditional object — the real tomogram. After that, the restoration was performed using an array of calculated signals. The visual and quantitative comparison criteria, including...
Advancements in both computer science and biotechnology opened way for an unprecedented amount and variety of gene expression raw data to appear in the open access. It is sometimes worth to rearrange and unite data from several similar gene expression studies into new case-control groups to test new hypothesis using available data. Unfortunately, most popular gene expression databases, such as GEO...
In this paper the three-phase cylindrical inductor that heats the ferromagnetic tube to a temperature that is below the magnetic changes was considered. For axisymmetrical formulation of the problem the all components of the electromagnetic field was determined.
One of the most challenging problems is the wear of articular cartilage caused by the surfaces sliding over each other. It could be reduced with benefit of synovial layer which have the unique lubrication properties. This paper develops the model of fluid layer based on the Markov theory. In our study, we consider the synovial fluid as two-phase fluid with solid and liquid phase within the joint capsule...
The paper describes the tests of the prototype detector mini ELITPC conducted at IFIN-HH in Romania in 2016. The mini ELITPC detector was built for the development of the ELITPC detector — an active target time projection chamber designed to investigate reactions of interest for nuclear astrophysics, especially synthesis of oxygen. These will be investigated by time inversed photodisintegration reactions...
The paper analyzes the problem of drinking water pollution, as well as a brief overview of known methods and means for its purification. The general structure is proposed and the corresponding mathematical analysis of the original technology of controlled magneto hydrodynamic separation of liquids in strong transverse magnetic fields is performed, which is quite suitable for solving the problem of...
The article is devoted to the investigation of the structure of macro- and mesopores on the surface and inside of modified NH4NO3 granules. The main quality indicators of modified NH4NO3 granules are presented and the relationship between the nanoporous structure of granules and the quality indicators is shown. Various thermodynamic conditions for obtaining a nanoporous structure of the surface and...
This paper presents guidelines for passive components design of single-stage buck-boost inverter with unfolding circuit. This inverter has low number of passive components and it is intended for application where a wide input regulation range is required. All theoretical statements are confirmed by simulation results.
By means of PBW (Proton Beam Writing) technology n-Si monocrystal was irradiated. The energy of ions H+ was 1.5 MeV. The integrated dose was 2•1015 p/cm2. This treatment of the sample led to modification of the electrical properties of the material. Two layers were appeared under the surface of the silicon. The first one had higher resistivity than non-irradiated Si. The second one formed with much...
The characteristics of a simple generator of pseodo-random numbers used in IRE NASU for the system of astronomical observation modeling are studied. The principle of the generator is based on the fact that the set of all n-bit binary words excepting 0 forms a cyclic additive group of 2n-1 order with cyclic addition as a group operation. The tests are demonstrating the high quality of this generator.
We have considered the response of an ensemble of uniaxial ferromagnetic nanoparticles placed into a fluid to an alternating field in the presence of thermal bath. The attention was paid to the absorbtion of the field energy as a result of nanoparticles rotation in a viscous fluid. The influence of the inter-particle interaction effects was studied numerically based on the effective Langevin equation...
There are several approaches to the THz-frequency generation, however the existing techniques require complex experimental setups and can not be realized even at micron-scale. In contradiction to this a thin antiferromagnetic nanostructure covered by a thin metal layer having the strong spin-orbital coupling and biased by a DC spin current can be used as nano-scale source of electromagnetic AC signals...
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