Персона: Новиков, Григорий Григорьевич
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Институт интеллектуальных кибернетических систем
Цель ИИКС и стратегия развития - это подготовка кадров, способных противостоять современным угрозам и вызовам, обладающих знаниями и компетенциями в области кибернетики, информационной и финансовой безопасности для решения задач разработки базового программного обеспечения, повышения защищенности критически важных информационных систем и противодействия отмыванию денег, полученных преступным путем, и финансированию терроризма.
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Григорий Григорьевич
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- ПубликацияТолько метаданныеStudy of the Effect of Doping with Iron on the Luminescence of Zinc-Selenide Single Crystals(2019) Gladilin, A. A.; Ilichev, N. N.; Kalinushkin, V. P.; Studenikin, M. I.; Novikov, G. G.; Новиков, Григорий ГригорьевичThe effect of doping with iron (thermal diffusion from a surface) on the luminescence of zinc-selenide single crystals in the wavelength range 0.44-0.72 m and on the spatial distribution of luminescence centers are studied. By means of two-photon confocal microscopy, planar and volume maps of edge (exciton) and impurity-defect luminescence in the above-indicated spectral range are obtained for both doped and undoped crystals. It is shown that crystal regions containing a high iron concentration exhibit low-intensity luminescence in this range. It is found that, in the process of diffusion, several types of impurity-defect centers distributed in a complex way within the crystal bulk are formed. The nature of these centers is discussed.
- ПубликацияТолько метаданныеRecognition Matrix for Comparing Pages of Text by a Robot(2020) Novikov, G. G.; Yadykin, I. M.; Новиков, Григорий Григорьевич; Ядыкин, Игорь Михайлович© 2020, Springer Nature Switzerland AG.A method is proposed for express estimation of the degree of similarity of two pages of text with the help of recognition matrices in the conditions of a shortage of computing resources of an autonomous robot. The method is based on the geometrical approach of finding the hashes of words, taking into account their location on the page. An algorithm for generating recognition matrices of hashes of words and their coordinates on the page is proposed. The method and algorithm for comparing matrices using a single pass based on the method of a sweeping curve are considered. The assessment of the contribution of quantitative and qualitative factors in the formation of the magnitude of the degree of similarity.
- ПубликацияТолько метаданныеStable aqueous colloidal solutions of nd3+: Laf3 nanoparticles, promising for luminescent bioimaging in the near-infrared spectral range(2021) Popov, A.; Orlovskaya, E.; Shaidulin, A.; Vagapova, E.; Novikov, G.; Новиков, Григорий Григорьевич© 2021 by the authors. Licensee MDPI, Basel, Switzerland.Two series of stable aqueous colloidal solutions of Nd3+: LaF3 single-phase well-crystallized nanoparticles (NPs), possessing a fluorcerite structure with different activator concentrations in each series, were synthesized. A hydrothermal method involving microwave-assisted heating (HTMW) in two Berghof speedwave devices equipped with one magnetron (type I) or two magnetrons (type II) was used. The average sizes of NPs are 15.4 ± 6 nm (type I) and 21 ± 7 nm (type II). Both types of NPs have a size distribution that is well described by a double Gaussian function. The fluorescence kinetics of the4F3/2 level of the Nd3+ ion for NPs of both types, in contrast to a similar bulk crystal, demonstrates a luminescence quenching associated not only with Nd–Nd self-quenching, but also with an additional Nd–OH quenching. A method has been developed for determining the spontaneous radiative lifetime of the excited state of a dopant ion, with the significant contribution of the luminescence quenching caused by the presence of the impurity OH– acceptors located in the bulk of NPs. The relative quantum yield of fluorescence and the fluorescence brightness of an aqueous colloidal solution of type II NPs with an optimal concentration of Nd3+ are only 2.5 times lower than those of analogous Nd3+: LaF3 single crystals.
- ПубликацияТолько метаданныеTHE CONCEPTUAL DESIGN OF THE 7.5 MeV/U LIGHT ION INJECTOR(2021) Zavyalov, N. V.; Smetanin, M. L.; Telnov, A. V.; Polozov, S. M.; Aksentyev, A. E.; Bulgacheva, M. M.; Deryabochkin, O. A.; Dmitriev, M. S.; Dmitriyeva, V. V.; Dyakonov, M. V.; Dyubkov, V. S.; Gerasimenko, A. V.; Gorchakov, A. A.; Gusarova, M. A.; Guzov, M. A.; Indiushnii, E. N.; Ivanov, O. A.; Korshunov, A. M.; Kozlovskiy, K. I.; Krasnov, A. S.; Lalayan, M. V.; Lozeev, Y. Y.; Lozeeva, T. A.; Makarov, A. I.; Matsievskiy, S. V.; Melekhov, A. P.; Murygin, O. V.; Nemchenko, R. E.; Novikov, G.; Novozhilov, A. E.; Panishev, A. S.; Pashentsev, V. N.; Plotnikov, E. A.; Ponomarenko, A. G.; Prokopenko, A. V.; Rashchikov, V. I.; Samoshin, A. V.; Savchik, A. A.; Shatokhin, V. L.; Shikanov, A. E.; Smirnov, K. D.; Tsarev, G. A.; Tumanov, S. A.; Yurin, I. A.; Zhigailova, M. I.; Полозов, Сергей Маркович; Аксентьев, Александр Евгеньевич; Булгачева, Маргарита Максатовна; Дерябочкин, Олег Владимирович; Дмитриев, Максим Сергеевич; Дмитриева, Валентина Викторовна; Дьяконов, Максим Валентинович; Дюбков, Вячеслав Сергеевич; Гусарова, Мария Александровна; Гузов, Максим Алексеевич; Индюшный, Евгений Николаевич; Иванов, Олег Александрович; Козловский, Константин Иванович; Краснов, Артем Сергеевич; Лалаян, Михаил Владимирович; Лозеев, Юрий Юрьевич; Лозеева, Татьяна Андреевна; Мациевский, Сергей Викторович; Мелехов, Андрей Петрович; Мурыгин, Олег Викторович; Новиков, Григорий Григорьевич; Новожилов, Александр Евгеньевич; Панишев, Александр Сергеевич; Пашенцев, Владимир Николаевич; Плотников, Евгений Александрович; Пономаренко, Алексей Гаврилович; Прокопенко, Александр Валерьевич; Ращиков, Владимир Иванович; Самошин, Александр Вячеславович; Савчик, Алексей Александрович; Шатохин, Вадим Леонидович; Шиканов, Александр Евгеньевич; Туманов, Сергей Алексеевич; Юрин, Илья Андреевич; Жигайлова, Марина Ивановна© 27th Russian Particle Accelerator Conference, RuPAC 2021. All rights reserved.The new linac for light ion beam injection is under development at MEPhI. Such linac was proposed for acceleration of 7.5 MeV/nucleon ion beam with A/Z=1-3.5 and current up to 5 mA for proton and 0.4 pmA for light ions. The linac general layout will include two types of ion sources: ECR ion source for proton and He ions and laser ion source for ions form Li to O. Following the LEBT ions will be bunched and accelerated to the final energy using RFQ section and 14 IH-cavities. These IH-cavities will be identical (divided into two groups) and independently phased. All cavities will operate on 81.25 MHz. Results of the beam dynamics simulations and the cavities design will be presented in the report.
- ПубликацияТолько метаданныеLaser ablation and fragmentation of Boron in liquids(2022) Aiyyzhy, K. O.; Barmina, E. V.; Voronov, V. V.; Uvarov, O. V.; AShafeev, G. A.; Novikov, G.; Новиков, Григорий Григорьевич© 2022 Elsevier LtdNanoparticles of elemental Boron are generated for the first time by laser ablation of a sintered Boron target in liquid isopropanol and subsequent laser fragmentation of the suspension. For this purpose an ytterbium doped fiber laser was used at wavelength of 1060–1070 nm, pulse repetition rate of 20 kHz, and pulse duration of 200 ns. The size of Boron nanoparticles after ablation and fragmentation of the suspension is between 5 and 50 nm with maximum of size distribution at 12 nm. Nanoparticles are made mostly of Boron and carbon, some particles have graphitized carbon shell. Allotropic composition of nanoparticles differs from that of the initial Boron target. Possible applications are discussed.