7 research outputs found

    Experimental investigations and mathematical modeling of the dynamics of thermal decomposition of carbon composites

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    The thermolysis of carbon compositions of leading enterprises of the electrode branch of industry is experimentally investigated by methods of differential thermal and gravimetric analysis in a temperature range of 200-900°C using a Setsys Evolution 1750 derivatograph. The samples of "green" billets differed in the granulometric composition of carbon of the filling agent and the type of the binding agent (pitch). They were heated at a rate of 15 K/min in the inert medium. The data on the isolation of volatiles were processed by mathematical modeling in the Mathcad-11 medium by one- and two-component diagrams of computation of the kinetics of the thermolysis process. Mathematical models adequately describing these experimental data were constructed. The constants or the reaction rate and activation energies of decomposition of the binder of carbon composites for both diagrams of the computations were established. An example of the computation of thermolysis for industrial conditions of roasting the graphitized electrode of the EG Ø200 mm grade is presented

    ЀизичСская Π°ΠΊΡ‚ΠΈΠ²Π½ΠΎΡΡ‚ΡŒ Π²ΠΎΠ΅Π½Π½ΠΎ-морских спСциалистов ΠΊΠ°ΠΊ Ρ„Π°ΠΊΡ‚ΠΎΡ€ сохранСния ΠΈΡ… ΠΏΡ€ΠΎΡ„Π΅ΡΡΠΈΠΎΠ½Π°Π»ΡŒΠ½ΠΎΠΉ

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    The purpose of the study was to assess the physical activity of naval specialists in the conditions of the march, for which they evaluated their physical performance and revealed its dependence on the regularity of the exercise program. In total, 80 crew members of the ship aged 20 to 40 years old were surveyed during a two-month hike with a different physical training regime β€” not engaged, engaged in physical training under the guidance of a ship-driver according to a specially developed program, and doing it independently. As a result of the study, it was revealed that naval specialists who were not engaged in physical training during a hike, have multidirectional dynamics of their physical performance, improving in the middle of the hike, and returning to the initial state by the end of the hike. Naval specialists, who regularly exercised independently, have a positive dynamics of their physical performance, which significantly increases both in the middle and at the end of the cruise. A tendency towards a deterioration in the level of physical performance is observed among persons engaged in independent and irregular ways at the end of a hike. As a result of the research, it has been established that the use of a specially developed training program for physical activity allows us not only to preserve, but also improve the physical performance of naval specialists in the conditions of a hike.ЦСлью исслСдования Π±Ρ‹Π»ΠΎ ΠΈΠ·ΡƒΡ‡Π΅Π½ΠΈΠ΅ физичСской активности Π²ΠΎΠ΅Π½Π½ΠΎ-морских спСциалистов Π² условиях ΠΏΠΎΡ…ΠΎΠ΄Π°, для Ρ‡Π΅Π³ΠΎ ΠΎΡΡƒΡ‰Π΅ΡΡ‚Π²Π»ΡΠ»Π°ΡΡŒ ΠΎΡ†Π΅Π½ΠΊΠ° ΠΈΡ… физичСской работоспособности ΠΈ выявлСниС Π΅Π΅ зависимости ΠΎΡ‚ рСгулярности выполнСния ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΡ‹ физичСских Π½Π°Π³Ρ€ΡƒΠ·ΠΎΠΊ. ВсСго Π±Ρ‹Π»ΠΎ обслСдовано 80 Ρ‡Π΅Π»ΠΎΠ²Π΅ΠΊ экипаТа корабля Π² возрастС ΠΎΡ‚ 20 Π΄ΠΎ 40 Π»Π΅Ρ‚ Π½Π° протяТСнии двухмСсячного ΠΏΠΎΡ…ΠΎΠ΄Π° с Ρ€Π°Π·Π»ΠΈΡ‡Π½Ρ‹ΠΌ Ρ€Π΅ΠΆΠΈΠΌΠΎΠΌ физичСской Ρ‚Ρ€Π΅Π½ΠΈΡ€ΠΎΠ²ΠΊΠΈ β€” Π½Π΅ Π·Π°Π½ΠΈΠΌΠ°ΡŽΡ‰ΠΈΡ…ΡΡ, Π·Π°Π½ΠΈΠΌΠ°ΡŽΡ‰ΠΈΡ…ΡΡ физичСскими Ρ‚Ρ€Π΅Π½ΠΈΡ€ΠΎΠ²ΠΊΠ°ΠΌΠΈ ΠΏΠΎΠ΄ руководством ΠΊΠΎΡ€Π°Π±Π΅Π»ΡŒΠ½ΠΎΠ³ΠΎ Π²Ρ€Π°Ρ‡Π° ΠΏΠΎ ΡΠΏΠ΅Ρ†ΠΈΠ°Π»ΡŒΠ½ΠΎ Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π½ΠΎΠΉ ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΠ΅, ΠΈ Π·Π°Π½ΠΈΠΌΠ°ΡŽΡ‰ΠΈΡ…ΡΡ ΡΠ°ΠΌΠΎΡΡ‚ΠΎΡΡ‚Π΅Π»ΡŒΠ½ΠΎ. ВыявлСно, Ρ‡Ρ‚ΠΎ Ρƒ Π²ΠΎΠ΅Π½Π½ΠΎ-морских спСциалистов, Π½Π΅ Π·Π°Π½ΠΈΠΌΠ°Π²ΡˆΠΈΡ…ΡΡ физичСскими Ρ‚Ρ€Π΅Π½ΠΈΡ€ΠΎΠ²ΠΊΠ°ΠΌΠΈ Π² ΠΏΠΎΡ…ΠΎΠ΄Π΅, Π½Π°Π±Π»ΡŽΠ΄Π°Π΅Ρ‚ΡΡ разнонаправлСнная Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ° физичСской работоспособности, ΡƒΠ»ΡƒΡ‡ΡˆΠ°ΡΡΡŒ Π² сСрСдинС ΠΏΠΎΡ…ΠΎΠ΄Π° ΠΈ Π²ΠΎΠ·Π²Ρ€Π°Ρ‰Π°ΡΡΡŒ ΠΊ исходному ΡΠΎΡΡ‚ΠΎΡΠ½ΠΈΡŽ ΠΊ ΠΊΠΎΠ½Ρ†Ρƒ ΠΏΠΎΡ…ΠΎΠ΄Π°. Π£ Π²ΠΎΠ΅Π½Π½ΠΎ-морских спСциалистов, рСгулярно Π·Π°Π½ΠΈΠΌΠ°Π²ΡˆΠΈΡ…ΡΡ физичСскими упраТнСниями ΡΠ°ΠΌΠΎΡΡ‚ΠΎΡΡ‚Π΅Π»ΡŒΠ½ΠΎ, Π½Π°Π±Π»ΡŽΠ΄Π°Π΅Ρ‚ΡΡ ΠΏΠΎΠ»ΠΎΠΆΠΈΡ‚Π΅Π»ΡŒΠ½Π°Ρ Π΄ΠΈΠ½Π°ΠΌΠΈΠΊΠ° физичСской работоспособности, которая достовСрно увСличиваСтся ΠΊΠ°ΠΊ Π² сСрСдинС, Ρ‚Π°ΠΊ ΠΈ Π² ΠΊΠΎΠ½Ρ†Π΅ ΠΏΠΎΡ…ΠΎΠ΄Π°. Π£ Π»ΠΈΡ†, Π·Π°Π½ΠΈΠΌΠ°Π²ΡˆΠΈΡ…ΡΡ ΡΠ°ΠΌΠΎΡΡ‚ΠΎΡΡ‚Π΅Π»ΡŒΠ½ΠΎ ΠΈ нСрСгулярно Π² ΠΊΠΎΠ½Ρ†Π΅ ΠΏΠΎΡ…ΠΎΠ΄Π°, Π½Π°Π±Π»ΡŽΠ΄Π°Π΅Ρ‚ΡΡ тСндСнция ΠΊ ΡƒΡ…ΡƒΠ΄ΡˆΠ΅Π½ΠΈΡŽ физичСской работоспособности. Π’ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Π΅ исслСдования установлСно, Ρ‡Ρ‚ΠΎ ΠΏΡ€ΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ ΡΠΏΠ΅Ρ†ΠΈΠ°Π»ΡŒΠ½ΠΎ Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π½ΠΎΠΉ ΠΏΡ€ΠΎΠ³Ρ€Π°ΠΌΠΌΡ‹ Ρ‚Ρ€Π΅Π½ΠΈΡ€ΠΎΠ²ΠΎΠΊ физичСской активности позволяСт достовСрно Π½Π΅ Ρ‚ΠΎΠ»ΡŒΠΊΠΎ ΡΠΎΡ…Ρ€Π°Π½ΠΈΡ‚ΡŒ, Π½ΠΎ ΠΈ ΡƒΠ»ΡƒΡ‡ΡˆΠΈΡ‚ΡŒ Ρ„ΠΈΠ·ΠΈΡ‡Π΅ΡΠΊΡƒΡŽ Ρ€Π°Π±ΠΎΡ‚ΠΎΡΠΏΠΎΡΠΎΠ±Π½ΠΎΡΡ‚ΡŒ Π²ΠΎΠ΅Π½Π½ΠΎ-морских спСциалистов Π² условиях ΠΏΠΎΡ…ΠΎΠ΄Π°.</p
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