309 research outputs found

    Разработка системы управления процессом приготовления топлива в форме органоводоугольных суспензий

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    Разработана система управления процессом приготовления топлива в форме органоводоугольных суспензий для сжигания в котельном агрегате. Автоматизированная система подготавливает необходимое топливо путем регулирования расходов компонентов, входящих в состав топлива. В данной работе проведены экспериментальные исследования по определению стабильности органоводоугольных топлив, а также минимальных температур зажигания и максимальных температур горения суспензий.A control system for preparing fuel in the form of organic coal-water slurry for combustion in a boiler unit has been developed. Automated system preparing necessary fuel by control of component consumption. In this work experimental research have been carried out to define the stability of organic coal-water fuels, as well as minimum ignition temperatures and maximum combustion temperatures of slurries

    Эколого-биогеохимическая оценка территории г. Улан-Удэ по данным изучения листьев тополя

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    Цель: провести эколого-биогеохимическую оценку состояния территории г. Улан-Удэ по данным изучения листьев тополя и выявить возможные источники рассеяния химических элементов в атмосферном воздухе с помощью биогеохимических исследований. Объект исследования: листья тополя бальзамического (Populus Balsamifera L.) Предмет исследования: химический и минеральный состав листьев тополя на территории г. Улан-Удэ. Пробы отобраны в августе 2014 года по равномерной сети опробования 2*2 км. В период 2016-2017 г. проведён инструментальный нейтронно-активационный и атомно-абсорбционный анализ проб. В 2020-2021 г. проведены электронно-микроскопические исследования минерального состава листвы тополя и рентгенофазовый анализ золы листьев.Purpose: to conduct an ecological and biogeochemical assessment of the state of the territory of Ulan-Ude based on the study of poplar leaves and to identify possible sources of dispersion of chemical elements in the atmospheric air using biogeochemical studies. Object of research: balsamic poplar leaves (Populus Balsamifera L.) Subject of research: chemical and mineral composition of poplar leaves on the territory of Ulan-Ude. The samples were taken in August 2014 using a uniform sampling network of 2*2 km. In the period 2016-2017, instrumental neutron activation and atomic absorption analysis was conducted. In 2020-2021, electron microscopic studies of the mineral composition of poplar foliage and X-ray phase analysis of leaf ash were conducted

    Комплексный подход к методам борьбы с гидратообразованием на Казанском нефтегазоконденсатном месторождении (Томская область)

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    Выбор наиболее эффективного метода для предупреждения и ликвидации гидратообразования на Казанском месторождении.Selection of the most effective method to prevent and eliminate hydrate formation at the Kazan field

    The Role of Myeloid-Derived Cells in the Progression of Liver Disease

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    Control of homeostasis and rapid response to tissue damage in the liver is orchestrated by crosstalk between resident and infiltrating inflammatory cells. A crucial role for myeloid cells during hepatic injury and repair has emerged where resident Kupffer cells, circulating monocytes, macrophages, dendritic cells and neutrophils control local tissue inflammation and regenerative function to maintain tissue architecture. Studies in humans and rodents have revealed a heterogeneous population of myeloid cells that respond to the local environment by either promoting regeneration or driving the inflammatory processes that can lead to hepatitis, fibrogenesis, and the development of cirrhosis and malignancy. Such plasticity of myeloid cell responses presents unique challenges for therapeutic intervention strategies and a greater understanding of the underlying mechanisms is needed. Here we review the role of myeloid cells in the establishment and progression of liver disease and highlight key pathways that have become the focus for current and future therapeutic strategies

    K0s K0s Final State in Two-Photon Collisions and Implications for Glueballs

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    The K0s K0s final state in two-photon collisions is studied with the L3 detector at LEP. The mass spectrum is dominated by the formation of the f_2'(1525) tensor meson in the helicity-two state with a two-photon width times the branching ratio into K Kbar of 76 +- 6 +- 11 eV. A clear signal for the formation of the f_J(1710) is observed and it is found to be dominated by the spin-two helicity-two state. No resonance is observed in the mass region around 2.2 GeV and an upper limit of 1.4 eV at 95% C.L. is derived for the two-photon width times the branching ratio into K0s K0s for the glueball candidate xi(2230)

    Study of Z Boson Pair Production in e^+e^- Interactions at \sqrt{s}=192 - 202 GeV

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    The cross section for the production of Z boson pairs is measured using the data collected by the L3 detector at LEP in 1999 in e^+e^- collisions at centre-of-mass energies ranging from 192 GeV up to 202 GeV. Events in all the visible final states are selected, measuring the cross section of this process. The special case of final states containing b quarks is also investigated. All results are in agreement with the Standard Model predictions

    Measurement of the W-Pair Production Cross Section and W-Decay Branching Fractions in e+ee^{+}e^{-} Interactions at s\sqrt{s}= 189 GeV

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    The data collected by the L3 experiment at LEP at a centre-of-mass energy of 188.6 GeV188.6~\rm{Ge\kern -0.1em V} are used to measure the W-pair production cross section and the W-boson decay branching fractions. These data correspond to an integrated luminosity of 176.8~pb1^{-1}. The total cross section for W-pair production, combining all final states, is measured to be σWW=16.24±0.37 (stat.)±0.22 (syst.)\sigma_{\rm{WW}}= 16.24 \pm 0.37~(stat.) \pm 0.22~(syst.)~pb. Including our data collected at lower centre-of-mass energies, the hadronic branching fraction of the W-boson is determined to be B(Wqq)=[68.20±0.68 (stat.)±0.33 (syst.)] % B(\rm{W} \rightarrow \rm{qq})= \left[ 68.20 \pm 0.68~(stat.) \pm 0.33~(syst.)\right]~\%. The results agree with the Standard Model predictions.The data collected by the L3 experiment at LEP at a centre-of-mass energy of 188.6 GeV are used to measure the W-pair production cross section and the W-boson decay branching fractions. These data correspond to an integrated luminosity of 176.8pb^-1. The total cross section for W-pair production, combining all final states, is measured to be sigma_WW = 16.24 +/- 0.37(stat.) +/- 0.22(syst.) pb. Including our data collected at lower centre-of-mass energies, the hadronic branching fraction of the W-boson is determined to be B(W ->qq) = [68.20 +/- 0.68 (stat.) +/- 0.33 (syst.) ] %. The results agree with the Standard Model predictions.The data collected by the L3 experiment at LEP at a centre-of-mass energy of 188.6 GeV are used to measure the W-pair production cross section and the W-boson decay branching fractions. These data correspond to an integrated luminosity of 176.8 pb −1 . The total cross section for W-pair production, combining all final states, is measured to be σ WW =16.24±0.37 (stat.)±0.22 (syst.) pb. Including our data collected at lower centre-of-mass energies, the hadronic branching fraction of the W-boson is determined to be B (W→qq)=[68.20±0.68 (stat.)±0.33 (syst.)]%. The results agree with the Standard Model predictions
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