Autor: Demchenko, A. V. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Experience of Suckling Perfection of Secondary Clarifier of Aeration Station in Almaty, Kazakhstan
Autorzy:: Ospanov, K. T.
Demchenko, A. V.
Kudaiberdi, Z.
Powiązania:: https://bibliotekanauki.pl/articles/123839.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: water disposal
waste water
secondary sedimentation tank
activated sludge
cesspool emptier
sucker
Opis:: This article presents the results of experimental studies pertaining to the suckling improvement of secondary clarifier in an aeration station in Almaty. According to the obtained research results, the work of secondary clarifiers was evaluated for the removal of suspended solids, concentration of returned sludge and sediment moisture. The technical specifications of aerations, secondary settling tanks and cesspool emptier in the aeration station of Almaty were defined. Additionally, it was shown that the use of the articulated sucker with movable scrapers can increase the efficiency of cleaning the bottom of the circular tanks. In this practical test, the proposed suckling radial settler in aeration station of Almaty during the year showed that the sucker reduces the costs for the installation and maintenance of cesspool emptier and has no damaging effects on the bottom of the sump.
Źródło:: Journal of Ecological Engineering; 2018, 19, 5; 210-218
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Probabilistic approach for the determination of cuts permissible braking modes on the gravity humps
Вероятностный подход к определению допустимых режимов торможения отцепов на сортировочных горках
Autorzy:: Bobrovskyi, V.
Kozachenko, D.
Dorosh, A.
Demchenko, E.
Bolanovska, T.
Kolesnik, A.
Powiązania:: https://bibliotekanauki.pl/articles/374423.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: marshalling yard
freight train
gravity hump
braking mode
brake position
stacja rozrządowa
pociąg towarowy
próg grawitacji
tryb hamowania
pozycja hamowania
Opis:: The paper presents the research results of cuts braking modes on the gravity humps. The objective of this paper is developing the methods for assessment of braking modes of cuts under conditions of fuzziness of their rolling properties, as well as selecting the permissible starting speed range of cuts from retardant positions. As a criterion for assessing the modes of target control of cut rolling speed, it was proposed to use an average gap size on a classification track at the established norms of probable exceeding of permissible speed of cars collision and their stop in retarders. As a criterion for evaluating the modes of interval control of cuts rolling speed, using the risk of their nonseparation on the switches was proposed. Using the simulation modeling and mathematical statistics, the configuration of the range of permissible speed of cuts coming out from retardant positions has been set. The conducted researches allow simplifying the choice of cut braking modes in systems of automatic control of cut rolling speed.
В статье представлены результаты исследований режимов торможе-ния отцепов на сортировочных горках. Целью статьи является разработка методов оценки режимов торможения отцепов в условиях неопределенности их ходовых характеристик, а также поиск области допустимых скоростей выхода отцепов из тормозных позиций. В качестве критерия для оценки режимов прицельного регу-лирования скорости скатывания отцепов предложено использовать среднюю вели-чину окна на сортировочном пути при установленных нормах вероятности превы-шения допустимых скоростей соударения вагонов и остановки их в замедлителях. В качестве критерия для оценки режимов интервального регулирования скорости скатывания отцепов предложено использовать риск их неразделения на стрелках. Спомощью методов имитационного моделирования и математической статистики установлена конфигурация области допустимых споростей выхода отцепов из тор-мозных позиций. Выполненные исследования позволяют упростить решение задачи выбора режимов торможения отцепов в системах автоматического управления скоростью их скатывания.
Źródło:: Transport Problems; 2016, 11, 1; 147-155
1896-0596
2300-861X
Pojawia się w:: Transport Problems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Specific Features of Content Dependences for Energy Gap in $In_{x}Tl_{1-x}I$ Solid State Crystalline Alloys
Autorzy:: Kashuba, A.
Piasecki, M.
Bovgyra, O.
Stadnyk, V.
Demchenko, P.
Fedorchuk, A.
Franiv, A.
Andriyevsky, B.
Powiązania:: https://bibliotekanauki.pl/articles/1398249.pdf
Data publikacji:: 2018-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.Nr
71.20.-b
42.70.Gi
71.35.-y
Opis:: A series of $In_{x}Tl_{1-x}I$ (x=0.4-0.9) single crystalline solid state alloys were successfully synthesized by the vertical Bridgman method. For the first time the density functional theory based band structure calculations are performed and features of the band energy dispersion are discussed. Comparison with the experimental energy gap $E_{g}$ obtained from the optical photoconductivity is discussed. An essential role of the localized defects and excitons in formation of the edge photoconductivity is analyzed. Relation between the crystal structure and photoconductivity of the materials studied is discussed. Also the origin of the principal valence and conduction bands is explored. Experimental measurements of the band gap $E_{g}$ by the optical and photoconductivity methods have given opposite dependences with respect to the indium content x. Features of the photoconductivity spectra for different crystallographic directions have been discussed with taking into account the chemical bonds anisotropy.
Źródło:: Acta Physica Polonica A; 2018, 133, 1; 68-75
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: (Eu,Gd)Te - MBE Growth and Characterization
Autorzy:: Dziawa, P.
Taliashvili, B.
Domuchowski, W.
Łusakowska, E.
Arciszewska, M.
Demchenko, I.
Dobrowolski, W.
Dybko, K.
Fedorych, O. M.
Nadolny, A. J.
Osinniy, V.
Petrouchyk, A.
Story, T.
Powiązania:: https://bibliotekanauki.pl/articles/2038228.pdf
Data publikacji:: 2004-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 75.50.Pp
81.15.Hi
Opis:: Monocrystalline thin layers of (Eu,Gd)Te, n-type ferromagnetic semiconductor, were grown by molecular beam epitaxy technique on BaF$\text{}_{2}$ (111) substrates. Reflection high-energy electron diffraction, X-ray diffraction, and atomic force microscopy characterization proved epitaxial mode of growth and high crystal quality of the layers. Magnetic susceptibility and magnetic resonance measurements showed that in (Eu,Gd)Te layers ferromagnetic transition takes place at about 13 K. Electrical characterization carried out by the Hall effect and resistivity measurements revealed very high electron concentration of 10$\text{}^{20}$~cm$\text{}^{-3}$ and sharp maximum of resistivity at transition temperature.
Źródło:: Acta Physica Polonica A; 2004, 106, 2; 215-221
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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