The authors of the article test the hypothesis about the impact of digitalisation processes on the level of territories’ economic development. This hypothesis is based on the fact that in the Russian ...Federation digital transformation is considered as a conceptual model for improving the activities of intraregional economic units and the development of modern society, as well as a factor of economic and social breakthrough. The purpose of the study is to develop scientific and methodological support for the territories’ transformations management based on digital transformation. Systematization and generalization of methodological approaches to the assessment of digital transformation in the region have been carried out. For this purpose, a scientific approach to the design of indicators system characterizing the processes of digitalisation is proposed. To test the approach, a correlation analysis of the current state of digital development impact on the territories’ economic results was carried out. The analysis of the statistical dependence between the development and welfare level of Russian regions and the parameters of their digitalization showed a low (moderate) relationship. This means that with the current volume of funding for digital transformation and the use of information technologies, devices and special software, it is impossible to ensure the breakthrough development of regional economic systems and their production complexes.
The properties of a technical cushion fabric modified by a low-temperature plasma are studied. It established that the treatment with plasma of low pressure allows us to give anti-adhesive properties ...of technical fabrics with improvement of physical and mechanical properties.
The long and short range orders in 0.4Na
1/2
Bi
1/2
TiO
3
-(0.6-x)SrTiO
3
-xPbTiO
3
solid solutions were studied by x-ray diffraction and Raman spectroscopy. X-ray diffraction patterns for these ...compositions in the relaxor state are different for bulk and powdered samples. It was found that, in spite of different tetragonality depending on PbTiO
3
content, the Raman spectra suggest similarity of local structure for all studied compositions. Both methods indicate a disappearance of tetragonal phase upon increasing temperature.
The electric properties of the Fe - doped BaTiO
3
ceramics was investigated as a function of frequency and temperature. The structure and morphology of investigated sample were characterized by an ...X-ray diffraction and scanning electron microscopy. The impedance measurements were carried out at the temperature ranging from 450 K to 600 K, and at the frequency range from 0.1 Hz to 10 MHz. Based on these parameters the electrical properties of the grains and grains boundaries were described. The bulk and grains boundaries resistance of ceramics and the thermal activation energies were determined.
The paper reports on a new protective coating composed of polyanionic cellulose, Al and micro-additive Zr powders. The work has investigated a structure and phase composition of the composite ...coating. The study hasn't revealed any change of chemical composition in components of the overlay when coating and found macro-molecules of the polymer react with oxidic shells of particles due to hydrogen bonding. It has been established that adhesion strength of the coating increases 4 to 15 MPa when modifying an original suspension with zirconium micro-particles of less than 5 µm. The reason adhesion of the coating increases is reported to be agglomerates of Al and Zr fine fractions localized in hollows of the surface to be protected and on "adhesive-base" boundary.
Phase coexistence region is studied by x-ray diffraction for Na
1/2
Bi
1/2
TiO
3
-BaTiO
3
solid solutions in the tetragonal phase side from the morphotropic phase boundary. The first order ...ferroelectric phase transition, determined from a jump in the temperature dependence of dielectric permittivity, is located inside the coexistence region of cubic and tetragonal phases and is below the temperature, where tetragonality disappears. At low BaTiO
3
concentrations phase transition into ferroelectric state at cooling is slowly approached in time and is smeared over large temperature range. Rietveld method, applied for more precise evaluation of phase content, reveals large local deformations inside the ferroelectric phase.
The BaTiO
3
and BaTiO
3
+X%wt.Eu
2
O
3
(X = 1, 2, 3) ceramics were prepared by a solid phase reaction. The structural and morphology studies were carried out by means of an X-ray diffraction ...technique and scanning electron microscopy, respectively. Elastic moduli were determined with the use of an ultrasonic method. The dielectric permittivity (ϵ′) and tanδ as a function of composition and temperature were investigated. The increasing concentration of Eu ions leads to a slight shift of the Curie temperature and changes the characteristics of ϵ′ and tanδ. The structural, mechanical and dielectric properties of the BTEX ceramics were discussed in terms of microstructure and dopants contents.
Presents the results of studying the influence of efficiency gas turbine and steam section of CCGT on the thermal efficiency of combined-cycle plant with back-pressure based on a powerful ...high-temperature gas turbine. To assess the impact of selected parameters was made analysis by method of small-deflection. The advantages of one-circuit combined-cycle in comparison with more complex schemes. According to the research results, have been made corresponding conclusions.
Lead-free (Na
0.5
Bi
0.5
)
1
x
Sr
x
TiO
3
(x = 0, 0.01 and 0.02) ceramics were manufactured through a solid-state mixed oxide method and their ac (σ
ac
) and dc (σ
dc
) electric conductivity were ...studied. It is shown that the low-frequency (100 Hz-1 MHz) ac conductivity obeys a power law σ
ac
∼ ω
s
characteristic for disordered materials. Both the dc and ac conductivities have thermally activated character and possess linear parts with different activation energies. The calculated activation energies are attributed to different mechanism of conductivity. Frequency dependence of σ
dc
and exponent s is reasonably interpreted by a correlated barrier hopping model. The NBT-ST system is expected to be a new promising candidate for lead-free electronic materials.
A study of low-frequency relaxation of polarization in conventionally prepared ceramic compounds of (1-x)(K
0.5
Na
0.5
)(Nb
0.93
Sb
0.07
)O
3
+xBaTiO
3
+0.5mol.%MnO
2
(x = 0.02, 0.04) examined over a ...wide temperature range is reported. Anomalous behavior of the temperature dependence of the coercive field E
c
(T) is detected in the temperature range of the orthorhombic to tetragonal phase transition. The observed features of polarization are assigned to dynamics of the domain structure at the temperature range of phase coexistence.
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