5 research outputs found
Analysis of promotions
Article describes the classification of promotions and determining the effectiveness of specific measures to stimulate sales (which isnt possible practically in most advertising companies)
ΠΡΠΊΡΠΎΡ Π²ΠΈΠ»ΡΠΎΠ²Ρ Π΅Π»Π΅ΠΊΡΡΠΎΠ΄ΠΈΠ½Π°ΠΌΡΡΠ½Ρ Ρ Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΠΊΠ΅ΡΠ°ΠΌΡΡΠ½ΠΈΡ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»ΡΠ²
ΠΠ°Π²Π΅Π΄Π΅Π½ΠΎ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΅ΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΈΡ
Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Ρ ΡΠΎΠ·ΡΠΎΠ±Π»Π΅Π½ΠΎΡ ΠΎΠ±Π»ΠΈΡΡΠ²Π°Π»ΡΠ½ΠΎΡ ΠΊΠ΅ΡΠ°ΠΌΡΡΠ½ΠΎΡ ΠΏΠ»ΠΈΡΠΊΠΈ Π· Π΅Π»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΡΠ΄Π½ΠΈΠΌΠΈ Π΄ΠΎΠ±Π°Π²ΠΊΠ°ΠΌΠΈ SiC 10 Ρ 20 ΠΌΠ°Ρ. %. ΠΠ° Π΄ΠΎΠΏΠΎΠΌΠΎΠ³ΠΎΡ Π²Π΅ΠΊΡΠΎΡΠ½ΠΎΠ³ΠΎ Π°Π½Π°Π»ΡΠ·Π°ΡΠΎΡΠ° ΠΌΠ΅ΡΠ΅ΠΆΡ
Keysight Technologies PNA N5227A Π²ΠΈΠΌΡΡΡΠ²Π°Π»ΠΈΡΡ ΠΎΡΠ½ΠΎΠ²Π½Ρ Π΅Π»Π΅ΠΊΡΡΠΎΠ΄ΠΈΠ½Π°ΠΌΡΡΠ½Ρ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΠΊΠ΅ΡΠ°ΠΌΡΠΊΠΈ: ΠΌΡΠΊΡΠΎΡ
Π²ΠΈΠ»ΡΠΎΠ²Π° Π΄ΡΠ΅Π»Π΅ΠΊΡΡΠΈΡΠ½Π° ΠΏΡΠΎΠ½ΠΈΠΊΠ½ΡΡΡΡ, ΡΠ°Π½Π³Π΅Π½Ρ ΠΊΡΡΠ° Π΄ΡΠ΅Π»Π΅ΠΊΡΡΠΈΡΠ½ΠΈΡ
Π²ΡΡΠ°Ρ, ΠΊΠΎΠ΅ΡΡΡΡΡΠ½ΡΠΈ Π·Π°Π³Π°ΡΠ°Π½Π½Ρ Ρ Π²ΡΠ΄Π±ΠΈΡΡΡ Π² Π΄ΡΠ°ΠΏΠ°Π·ΠΎΠ½Ρ ΡΠ°ΡΡΠΎΡ 1-67 ΠΠΡ. ΠΡΠΎΠ³ΡΠ°ΠΌΠ½Π΅ Π·Π°Π±Π΅Π·ΠΏΠ΅ΡΠ΅Π½Π½Ρ ΠΏΡΠΈΠ»Π°Π΄Ρ Π°Π²ΡΠΎΠΌΠ°ΡΠΈΠ·ΡΡ Π²ΠΈΠΌΡΡΡΠ²Π°Π½Π½Ρ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΠΎΡ Π΄ΡΠ΅Π»Π΅ΠΊΡΡΠΈΡΠ½ΠΎΡ ΠΏΡΠΎΠ½ΠΈΠΊΠ½ΠΎΡΡΡ Ρ ΠΌΠ°Π³Π½ΡΡΠ½ΠΎΡ ΠΏΡΠΎΠ½ΠΈΠΊΠ½ΠΎΡΡΡ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»ΡΠ². Π Π΅Π·ΡΠ»ΡΡΠ°ΡΠΈ ΠΌΠΎΠΆΡΡΡ
Π±ΡΡΠΈ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ Π² ΡΠΎΡΠΌΠ°ΡΡ S-ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡΠ², Ξ΅', Ξ΅", tanΞ΄, Β΅' Ρ Β΅". ΠΡΠ΅ΠΊΡΠΈΠ²Π½Π° Π΄ΡΠ΅Π»Π΅ΠΊΡΡΠΈΡΠ½Π° ΠΏΡΠΎΠ½ΠΈΠΊΠ½ΡΡΡΡ
ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡ Π·Π°Π»Π΅ΠΆΠΈΡΡ Π²ΡΠ΄ ΠΊΠΎΠ΅ΡΡΡΡΡΠ½ΡΠ° Π·Π°ΠΏΠΎΠ²Π½Π΅Π½Π½Ρ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠ½ΠΎΡ ΠΌΠ°ΡΡΠΈΡΡ ΡΠ°ΡΡΠΈΠ½ΠΊΠ°ΠΌΠΈ (Π²ΡΠ΄Π½ΠΎΡΠ΅Π½Π½Ρ Π·Π°Π³Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΎΠ±'ΡΠΌΡ ΡΠ°ΡΡΠΈΠ½ΠΎΠΊ Π΄ΠΎ Π²ΡΡΠΎΠ³ΠΎ ΠΎΠ±'ΡΠΌΡ ΡΠ΅ΡΠ΅Π΄ΠΎΠ²ΠΈΡΠ°). Π£ ΡΠ°Π·Ρ Π½ΠΈΠ·ΡΠΊΠΈΡ
ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΡΠΉ Π½Π°Π½ΠΎΡΠ°ΡΡΠΈΠ½ΠΎΠΊ ΠΏΡΠ΄Ρ
ΡΠ΄, Π·Π°ΡΠ½ΠΎΠ²Π°Π½ΠΈΠΉ Π½Π° ΡΠ΅ΠΎΡΡΡ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ ΡΠ΅ΡΠ΅Π΄ΠΎΠ²ΠΈΡΠ° ΠΠ°ΠΊΡΠ²Π΅Π»Π»Π°-ΠΠ°ΡΠ½Π΅ΡΡΠ°, Π΄Π°Ρ Π΄ΠΎΡΠΈΡΡ ΡΠΎΡΠ½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ.
ΠΠΎΠΊΠ°Π·Π°Π½ΠΎ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠΈ ΡΠΎΠ·ΡΠΎΠ±Π»Π΅Π½ΠΎΡ ΠΊΠ΅ΡΠ°ΠΌΡΠΊΠΈ, ΡΠΊΡ Π΄ΠΎΠ·Π²ΠΎΠ»ΡΡΡΡ Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠ²Π°ΡΠΈ ΡΡ Π² ΠΊΠΎΠ½ΡΡΡΡΠΊΡΡΠΉΠ½ΡΠΉ
ΡΠ΅Ρ
Π½ΡΡΡ ΡΠ° Π΅Π»Π΅ΠΊΡΡΠΎΠ½Π½ΠΈΡ
ΠΏΡΠΈΡΡΡΠΎΡΡ
Π· ΠΌΠ΅ΡΠΎΡ Π΅ΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠ³ΠΎ Π΅ΠΊΡΠ°Π½ΡΠ²Π°Π½Π½Ρ ΡΠΊΡΠ΄Π»ΠΈΠ²ΠΎΠ³ΠΎ Π΅Π»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΡΡΠ½ΠΎΠ³ΠΎ
Π²ΠΈΠΏΡΠΎΠΌΡΠ½ΡΠ²Π°Π½Π½Ρ. Π‘Π°ΠΌΡ ΠΊΠ΅ΡΠ°ΠΌΡΠΊΡ Π·Π° ΠΊΠ»Π°ΡΠΈΡΡΠΊΠ°ΡΡΡΡ ΠΌΠΎΠΆΠ½Π° Π²ΡΠ΄Π½Π΅ΡΡΠΈ Π΄ΠΎ ΡΠ°Π΄ΡΠΎΠΏΠΎΠ³Π»ΠΈΠ½Π°ΡΡΠΎΡ.The results of experimental studies of the developed veneering ceramics with electrically conductive
SiC admixtures of 10 and 20 wt. % are presented. The main electrodynamic characteristics of ceramics
such as microwave permittivity, dielectric loss tangent, attenuation and reflection coefficients were measured by PNA N5227A Keysight Technologies vector network analyzer in the frequency range of 1-67 GHz.
The instrument software automates measurements of complex permittivity and permeability of materials.
The results can be presented in S-parameter format, Ξ΅', Ξ΅", tanΞ΄, Β΅' and Β΅". The effective permittivity of the
composite depends on the filling factor of the composite matrix with particles (the ratio of the total volume
of particles to the entire volume of the medium). In the case of low concentrations of nanoparticles, the approach based on the Maxwell-Garnett effective medium theory provides fairly accurate results. The characteristics of the developed ceramics are shown, which allow its use in construction engineering and electronic devices in order to effectively shield harmful electromagnetic radiation. According to the classification,
ceramics themselves can be attributed to radio-absorbing ceramics
ΠΡΠΊΡΠΎΡ Π²ΠΈΠ»ΡΠΎΠ²Ρ Π²Π»Π°ΡΡΠΈΠ²ΠΎΡΡΡ ΠΠΠ-ΠΏΠΎΠ»ΡΠΌΠ΅ΡΠ½ΠΈΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΠ² Π· ΡΠ΅Π³ΡΠ΅Π³ΠΎΠ²Π°Π½ΠΎΡ ΠΏΡΠΎΠ²ΡΠ΄Π½ΠΎΡ ΠΌΠ΅ΡΠ΅ΠΆΠ΅Ρ
Π£ ΡΠΎΠ±ΠΎΡΡ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΈ Π΄ΠΎΡΠ»ΡΠ΄ΠΆΠ΅Π½Π½Ρ Π΅Π»Π΅ΠΊΡΡΠΎΠ΄ΠΈΠ½Π°ΠΌΡΡΠ½ΠΈΡ
Ρ Π΅ΠΊΡΠ°Π½ΡΡΡΠΈΡ
Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊ Π² Π΄ΡΠ°ΠΏΠ°Π·ΠΎΠ½Ρ 40-60 ΠΠΡ ΠΏΠΎΠ»ΡΠΌΠ΅ΡΠ½ΠΈΡ
ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΠ² Π· Π³ΡΠ°ΡΡΡΠΎΠ²ΠΈΠΌΠΈ Π½Π°Π½ΠΎΠΏΠ»Π°ΡΡΠΈΠ½ΠΊΠ°ΠΌΠΈ Ρ Π΄Π²ΠΎΠΌΠ° ΡΡΠ·Π½ΠΈΠΌΠΈ ΡΠΈΠΏΠ°ΠΌΠΈ ΠΏΠΎΠ»ΡΠΌΠ΅ΡΡ. Π―ΠΊ ΠΏΠΎΠ»ΡΠΌΠ΅ΡΠ½Ρ ΠΌΠ°ΡΡΠΈΡΡ Π²ΠΈΠΊΠΎΡΠΈΡΡΠΎΠ²ΡΠ²Π°Π»ΠΈ Π½Π°Π΄Π²ΠΈΡΠΎΠΊΠΎΠΌΠΎΠ»Π΅ΠΊΡΠ»ΡΡΠ½ΠΈΠΉ ΠΏΠΎΠ»ΡΠ΅ΡΠΈΠ»Π΅Π½ ΡΠ° ΠΏΠΎΠ»ΡΠ°ΠΌΡΠ΄ ΠΠ΅ΠΉΠ»ΠΎΠ½ 12.
ΠΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΠΎ ΠΎΠ΄Π½ΠΎΡΡΠ΄Π½ΡΡΡΡ Π³ΡΠ°Π½ΡΠ»ΠΎΠΌΠ΅ΡΡΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΊΠ»Π°Π΄Ρ ΠΏΠΎΠ»ΡΠΌΠ΅ΡΡ Π² ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡ ΡΠΈΠ»ΡΠ½ΠΎ Π²ΠΏΠ»ΠΈΠ²Π°Ρ Π½Π° Π²Π΅Π»ΠΈΡΠΈΠ½Ρ ΠΏΠ΅ΡΠΊΠΎΠ»ΡΡΡΠΉΠ½ΠΎΠ³ΠΎ ΠΏΠΎΡΠΎΠ³Ρ Π΅Π»Π΅ΠΊΡΡΠΎΠΏΡΠΎΠ²ΡΠ΄Π½ΠΎΡΡΡ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΠ², Π° ΡΠ°ΠΌΠ΅: ΡΠΈΠΌ ΠΌΠ΅Π½ΡΠ° Π΄ΠΈΡΠΏΠ΅ΡΡΡΡ ΡΠΎΠ·ΠΌΡΡΡΠ² ΡΠ°ΡΡΠΈΠ½ΠΎΠΊ,
ΡΠΈΠΌ Π½ΠΈΠΆΡΠΈΠΉ ΠΏΠΎΡΡΠ³ ΠΏΠ΅ΡΠΊΠΎΠ»ΡΡΡΡ. ΠΠ°Π»Π΅ΠΆΠ½ΠΎΡΡΡ Π΄ΡΠ΅Π»Π΅ΠΊΡΡΠΈΡΠ½ΠΎΡ ΠΏΡΠΎΠ½ΠΈΠΊΠ½ΠΎΡΡΡ Π²ΡΠ΄ ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΡΡ Π½Π°ΠΏΠΎΠ²Π½ΡΠ²Π°ΡΠ° Π΄ΠΎΡΠ»ΡΠ΄ΠΆΡΠ²Π°Π½ΠΈΡ
ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΠ² Π½Π΅ ΠΌΠ°ΡΡΡ ΠΏΠ΅ΡΠΊΠΎΠ»ΡΡΡΠΉΠ½ΠΎΡ ΠΏΠΎΠ²Π΅Π΄ΡΠ½ΠΊΠΈ Ρ ΠΌΠ°ΠΉΠΆΠ΅ Π½Π΅ Π·Π°Π»Π΅ΠΆΠ°ΡΡ Π²ΡΠ΄ ΡΠ°ΡΡΠΎΡΠΈ ΠΠΠ ΡΠ° ΡΠ°Π΄ΡΡΡΠ°
ΠΏΠΎΠ»ΡΠΌΠ΅ΡΠ½ΠΈΡ
Π³Π»ΠΎΠ±ΡΠ». ΠΡΠΈ ΡΡΠΎΠΌΡ ΠΎΠ΄Π½ΠΎΡΡΠ΄Π½ΡΡΡΡ Π³ΡΠ°Π½ΡΠ»ΠΎΠΌΠ΅ΡΡΠΈΡΠ½ΠΎΠ³ΠΎ ΡΠΊΠ»Π°Π΄Ρ ΠΏΠΎΠ·ΠΈΡΠΈΠ²Π½ΠΎ Π²ΠΏΠ»ΠΈΠ²Π°Ρ Π½Π° Π·Π±ΡΠ»ΡΡΠ΅Π½Π½Ρ
ΠΏΠΎΠ³Π»ΠΈΠ½Π°Π½Π½Ρ Π΅Π»Π΅ΠΊΡΡΠΎΠΌΠ°Π³Π½ΡΡΠ½ΠΈΡ
Ρ
Π²ΠΈΠ»Ρ Ρ ΠΌΠ°ΡΠ΅ΡΡΠ°Π»Ρ, ΡΠΎ ΠΏΡΠ΄ΡΠ²Π΅ΡΠ΄ΠΆΡΡΡΡΡΡ Π±ΡΠ»ΡΡ Π²ΠΈΡΠΎΠΊΠΈΠΌΠΈ Ρ
Π°ΡΠ°ΠΊΡΠ΅ΡΠΈΡΡΠΈΠΊΠ°ΠΌΠΈ
ΠΏΠΎΠ³Π»ΠΈΠ½Π°Π½Π½Ρ Ρ ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΡΠ² Π½Π° ΠΎΡΠ½ΠΎΠ²Ρ Π½Π΅ΠΉΠ»ΠΎΠ½Ρ ΠΏΠΎΡΡΠ²Π½ΡΠ½ΠΎ Π· ΠΊΠΎΠΌΠΏΠΎΠ·ΠΈΡΠ°ΠΌΠΈ Π· ΠΏΠΎΠ»ΡΠ΅ΡΠΈΠ»Π΅Π½ΠΎΠΌ.This work presents the results of investigation of the electrodynamic and shielding characteristics in
the range of 40-60 GHz of polymer composites with graphite nanoplatelets and two different types of polymers. Ultra-high molecular weight polyethylene and Nylon 12 polyamide were used as a polymer matrix. It
was found that the uniformity of the polymer particle size distribution in a composite strongly affects the
value of the percolation threshold of the electrical conductivity of composites, namely, the lower the particle size dispersion, the lower the percolation threshold. The dielectric permittivity dependences on the filler concentration of investigated composites do not have percolation behavior and are almost independent of
the electromagnetic radiation (EMR) frequency and the radius of polymer globules. At the same time, the
uniformity of the particle size distribution has a positive effect on the increase in the absorption of electromagnetic waves in the material, which is confirmed by higher absorption characteristics in nylon-based
composites compared to composites with polyethylene