16 research outputs found

    Новые полные метрики и меры нетривиальности для формул многозначных логик в автоматической кластеризации формул из логической базы знаний. II

    Get PDF
    В статье рассмотрены следующие задачи: обобщены ранее введённые расстояния и меры нетривиальности на n -значный случай любой логики, сняв ограничения на параметры; используя новые расстояния, разработаны алгоритмы кластеризации множеств формул в n -значной логике; проведены кластеризации подмножеств формул из различных баз знаний и предложены способы сравнения результатов различных адаптированных алгоритмов кластеризации

    Distribution of local density of states in disordered metallic samples: logarithmically normal asymptotics

    Full text link
    Asymptotical behavior of the distribution function of local density of states (LDOS) in disordered metallic samples is studied with making use of the supersymmetric σ\sigma--model approach, in combination with the saddle--point method. The LDOS distribution is found to have the logarithmically normal asymptotics for quasi--1D and 2D sample geometry. In the case of a quasi--1D sample, the result is confirmed by the exact solution. In 2D case a perfect agreement with an earlier renormalization group calculation is found. In 3D the found asymptotics is of somewhat different type: P(\rho)\sim \exp(-\mbox{const}\,|\ln^3\rho|).Comment: REVTEX, 14 pages, no figure

    Project of deuteron accelerator based neutron source for rib production

    No full text
    The project of a high-intense neutron source for the SPES project in LNL, Legnaro, Italy [1] is developed. The source is based on the rotating carbon target. The target is bombarded by the deuteron beam with energy 20 MeV, diameter 1 cm, average power 100 kW. The target is cooled by its thermal radiation, and its temperature can reach 1800ºC. It is shown that high density graphite can be used as a material for neutron production. The source can produce up to 10¹⁴ neutrons per second with energy within few MeV - few dozens MeV range, its lifetime is around few thousand hours

    Project of a fast neutron target based on a 10 MeV 300 kW proton accelerator

    No full text
    Project of targets for high intense neutron source is proposed. The source is based on a proton continuous accelerator with the 10 MeV particle energy and up to 300 kW mean beam power. Problems of fabrication of these targets are discussed. Hot solid state and liquid target designs are considered. Maximum admissible target parameters are presented. Advantages and disadvantages of various types of target for neutron production are discussed

    Новые полные метрики и меры нетривиальности для формул многозначных логик в автоматической кластеризации формул из логической базы знаний. I

    No full text
    В статье рассмотрены следующие задачи: обобщены ранее введённые расстояния и меры нетривиальности на n -значный случай любой логики, сняв ограничения на параметры; используя новые расстояния, разработаны алгоритмы кластеризации множеств формул в n -значной логике; проведены кластеризации подмножеств формул из различных баз знаний и предложены способы сравнения результатов различных адаптированных алгоритмов кластеризации

    Fertilizer circulation and nitrogen balance in the agrophytocenosis of sugar beet when acidizing typical chernozem (study with

    No full text
    The studies were carried out under the conditions of a microfield experiment on typical chernozem (Belgorod region) with two soils (pH 5.0 and 6.5) with the addition of urea (enriched in 15N, 17.1 at. %) And effluents from a pig-breeding complex (PSC) at doses of 6 and 12 g N/m2 (against the background of phosphate and potash fertilizers, P6K6). The largest amount of nitrogen was consumed by sugar beets with the combined introduction of CCA and urea (25.8 g N/m2). When the soil was acidified to pHsalt 5.0, the consumption of nitrogen in mineral fertilizers decreased by 15-18%, soil ni-trogen – by 21-52%, and waste nitrogen – by 16%. At the same time, the immobilization of nitrogen in the fertilizer decreased by 13-18%, and the loss of gaseous nitrogen compounds increased by 47-108%. The effluent from the pig-breeding complex increased the immobilization of nitrogen in mineral fertilizers (by 38-46%) and reduced gaseous nitrogen losses (by 22-44%). The highest stability and productivity (root crop yield 1654 g/m2, tops yield 239 g/m2) was exhibited by agrophytocenosis on soil with pH 6.5 with the combined application of CCA and urea. When the soil solution was acid-ified to pH 5.0, the yield of beet root crops decreased by 30% and the yield of tops – by 24%. On soil with pH 5.0, fertilizers increased the sugar content in root crops by 0.2-1.3%, on soil with pH 6.5, they decreased by 1.3-2.0%
    corecore