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Journal of Innovative Optical Health sciences 2020年第2期13卷 13-32页

作者： A.Abdurashitov V.Tuchin O.Semyachkina-Glushkovskaya Saratov State University Saratov 410012 Russian Federation Tomsk State University Tomsk 634050 Russian Federation institute of Precision Mechanics and Control russian academy of sciences Saratov 410028 Russian Federation

Photodynamic therapy(PDT)is a promising tool for least-invasive alternative methods for the treatment of brain *** newly discovered PDT-induced opening of the blood–brain barrier(BBB)permeability open novel strategies for drug-brain delivery during post-surgical treatment of glioblastoma *** we discuss mechanisms of PDT-mediated opening of the BBB and age differences in PDT-related increase in BBB permeability,including with formation of brain *** meningeal lymphatic system plays a crucial role in the mechanism of brain drainage and clearance from metabolites and toxic *** discuss that noninvasive photonic stimulation of°uid clearance via meningeal lymphatic vessels,and application of optical coherence tomography(OCT)for bed-side monitoring of meningeal lymphatic drainage has the promising perspective to be widely applied in both experimental and clinical studies of PDT and improving guidelines of PDT of brain tumors.

关键词： Photodynamic therapy optical coherence tomography(OCT) brain tumor meningeal lymphatic

Unsteadiness control of laminar junction flows on pressure fluctuations

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Applied Mathematics and Mechanics(English Edition) 2019年第3期40卷 373-380页

作者： Jianhua LIU Shucheng ZHAI E.KUDASHEV Fangwen HONG Kai YAN China Ship Scientific Research Center National Key Laboratory on Ship Vibration & Noise Space Research institute of russian academy of sciences

Smoke-wire flow visualization is conducted carefully in a laminar junction to explore the physical behavior of laminar junction flows. The two-dimensional(2 D)velocity fields in the 30?plane of a laminar junction flow are acquired by a time-resolved particle image velocimetry(PIV) system at a frame rate of 1 kHz, based on which the unsteady fluctuating pressure fields can be calculated by the multi-path integration method proposed in the literature(GAND, F., DECK, S., BRUNET,V., and SAGAUT, P. Flow dynamics past a simplified wing body junction. Physics of Fluids, 22(11), 115111(2010)).A novel control strategy is utilized to attenuate the unsteadiness of the horseshoe vortices of the laminar junction flow, and the consequent effect on pressure fields is analyzed.

关键词： junction flow horseshoe vortex pressure fluctuation flow visualization

Investigation of Al plasmas from thin foils irradiated by high-intensity extreme ultraviolet

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Matter and Radiation at Extremes 2017年第3期2卷 129-138页

作者： E.V.Grabovski P.V.Sasorov A.P.Shevelko V.V.Aleksandrov S.N.Andreev M.M.Basko A.V.Branitski A.N.Gritsuk G.S.Volkov Ya.N.Laukhin K.N.Mitrofanov G.M.Oleinik A.A.Samokhin V.P.Smirnov I.Yu.Tolstikhina I.N.Frolov O.F.Yakushev State Research Center of the russian Federation Troitsk institute for Innovation and Fusion Research 108840TroitskMoscowRussia Keldysh institute of Applied Mathematics of the russian academy of sciences Miusskaya pl.4125047MoscowRussia P.N.Lebedev Physical institute of the russian academy of sciences Leninsky pr.53Moscow119991Russia

dynamics and spectral transmission of Al plasma produced by extreme ultraviolet(EUV)irradiation of 0.75-mm thick Al foil is *** EUV radiation with the peak power density in the range of 0.19-0.54 TW/cm 2 is provided by Z-pinch formed by W multiwire array implosion in the Angara-5-1 *** of the experiment ensures that there are no plasma fluxes from the pinch toward the Al foil and *** same EUV source is used as a back illuminator for obtaining the absorption spectrum of Al plasma in the wavelength range of 5e24 *** comprises absorption lines of ions Al^(4+),Al^(5+),Al^(6+),Al^(7+).Analysis of relative intensities of the lines shows that those ions are formed in dense Al plasma with a temperature of~20 *** of Al plasma has been investigated with transverse laser *** have also performed radiation-gas-dynamics simulations of plasma dynamics affected by external radiation,which includes self-consistent radiation transport in a plasma *** simulations show good agreement with an experimental absorption spectrum and with experimental data concerning plasma dynamics,as well as with the analysis of line absorption *** confirms the correctness of the physical model underlying these simulations.

关键词： Z-pinch Dense plasma transparency

An improved simple snow-atmosphere-soil transfer model

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Science China Earth sciences 2012年第7期55卷 1206-1216页

作者： LIU HuiZhi ZHAI XiaoDong SUN ShuFen FENG JianWu WANG Lei State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China Graduate University of Chinese academy of sciences Beijing 100049China State Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

On the basis of a simple snow-atmosphere-soil transfer (SAST) model previously developed,this paper presents an improved snow-atmosphere-soil transfer (ISAST) model that has a new numerical scheme and an improved method of layering the *** new model takes the snow cover temperature and ice content in the snow cover as prognostic *** approach,which effectively solves the snow cover temperature distribution when the snow cover is melting or freezing,lessens the iteration time and computation time,which is important for GCM *** this model,the snow cover is divided into three layers (ISAST3) or seven layers (ISAST7).The simulation results obtained using the ISAST7 model agree well with observations in terms of snow depth,snow equivalent water and snow cover lifetime at five russian *** new ISAST model has better simulation capacity for snow cover than the previous SAST *** the snow cover is deep,the simulation of the ISAST7 model is better than that of the ISAST3 *** shows that our ISAST model is approximately 20% faster than the SAST model.

关键词： snow-atmosphere-soil transfer model snow cover depth snow equivalent water snow cover lifetime

Incubation time fracture criterion for FEM simulations

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Acta Mechanica Sinica 2011年第4期27卷 541-549页

作者： Vladimir Bratov institute for Problem in Mechanical Engineering of the russian academy of sciences Bolshoj pr.V.O.61199178St.-PetersburgRussia

The paper is discussing problems connected with embedment of the incubation time criterion for brittle fracture into finite element computational schemes. Incubation time fracture criterion is reviewed; practical questions of its numerical implementation are extensively discussed. Several examples of how the incubation time fracture criterion can be used as fracture condition in finite element computations are given. The examples include simulations of dynamic crack propagation and arrest, impact crater formation （i.e. fracture in initially intact media）, spall fracture in plates, propagation of cracks in pipelines. Applicability of the approach to model initiation, development and arrest of dynamic fracture is claimed.

关键词： Fracture dynamics Incubation time Crack dy-namics Finite element method Fracture arrest

Integrated modeling of fracturing-flowback-production dynamics and calibration on field data:Optimum well startup scenarios

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Petroleum Science 2023年第4期20卷 2202-2231页

作者： S.A.Boronin K.I.Tolmacheva I.A.Garagash I.R.Abdrakhmanov G.Yu Fisher A.L.Vainshtein P.K.Kabanova E.V.Shel G.V.Paderin A.A.Osiptsov Skolkovo institute of Science and Technology(Skoltech) Russia LLC Gazpromneft Science and Technology Center Russia The Schmidt institute of Physics of the Earth of the russian academy of sciences MoscowRussia

We aim at the development of a general modelling workflow for design and optimization of the well flowback and startup operation on hydraulically fractured *** flowback model developed earlier by the authors is extended to take into account several new fluid mechanics factors accompanying flowback,namely,viscoplastic rheology of unbroken cross-linked gel and coupled“fracture-reservoir”numerical submodel for influx from rock *** also developed models and implemented new geomechanical factors,namely,(i)fracture closure in gaps between proppant pillars and in proppant-free cavity in the vicinity of the well taking into account formation creep;(ii)propagation of plastic deformations due to tensile rock failure from the fracture face into the fluid-saturated *** carried out parametric calculations to study the dynamics of fracture conductivity during flowback and its effect on well production for the set of parameters typical of oil wells in Achimov formation of Western Siberia,*** first set of calculations is carried out using the flowback model in the reservoir linear flow *** is obtained that the typical length of hydraulic fracture zone,in which tensile rock failure at the fracture walls occurs,is *** the range of rock permeability in between 0.01 mD and 1 D,we studied the effect of non-dimensional governing parameters as well as bottomhole pressure drop dynamics on oil *** obtained a map of pressure drop regimes(fast,moderate or slow)leading to maximum cumulative oil *** second set of parametric calculations is carried out using integrated well production modelling workflow,in which the flowback model acts as a missing link in between hydraulic fracturing and reservoir commercial *** evaluated quantitatively effects of initial fracture aperture,proppant diameter,yield stress of fracturing fluid,pressure drop rate and proppant material type(ceramic and sand)on long-term well product

关键词： Fracture cleanup Flowback Tensile rock failure Fracture closure Proppant embedment Proppant pack compaction

The trade-off between COVID-19 and mental diseases burden during a lockdown: Mathematical modeling of control measures

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Infectious Disease Modelling 2023年第2期8卷 403-414页

作者： Alexei Alexeevich Romanyukha Konstantin Alexandrovich Novikov Konstantin Konstantinovich Avilov Timofey Alexandrovich Nestik Tatiana Evgenevna Sannikova Marchuk institute of Numerical Mathematics of the russian academy of sciences Gubkina str.8Moscow119333Russia institute of Psychology of the russian academy of sciences Yaroslavskaya str.13Moscow129366Russia

Background:During the COVID-19 pandemic,many countries used lockdowns as a containment *** lockdowns successfully contributed to slowing down the contagion,the related mobility restrictions were reportedly associated with an increased risk of major depressive and anxiety *** aimed to quantify the trade-off between the quality-adjusted life years(QALY)gain due to lower COVID-19 incidence as a result of a lockdown and QALY loss due to lockdown-induced mental ***:We developed an agent-based model of COVID-19 epidemic and coupled mental disorder development in the population of a large *** used data sources on the places of living,studying and working,public health and census *** of mental disorders was based on diathesis-stress *** quantified mental and physical health burden in terms of QALY taking into account major depressive and anxiety disorder episodes,lethal and non-lethal cases of COVID-19,and ***:We evaluated the dynamics of new major depressive disorder(MDD)and anxiety disorder(AD)cases during the period between September 2020 and December 2021 in Moscow,*** found that lockdown imposition increases the daily chances of getting MDD or ADD by a vulnerable person by 16.79%(95%CI[12.36%,21.23%]).The QALY loss associated with COVID-19-induced and lockdown-induced mental disorders was estimated to be 18.93%(95%CI[16.94%,19.73%])of the total QALY loss caused by COVID-19,immunization,and all kinds of mental *** a synthetic“strong”lockdown,it had been shown that QALY loss is minimized when about 70%of the population are ***:The burden associated with mental disorders amounts to a considerable part of COVID-19-related *** findings demonstrate that cost-benefit analysis of mobility restriction should include a forecast of mental disorder development in the population.

关键词： COVID-19 Agent-based model Major depressive and anxiety disorders Quality adjusted life years(QALY) Lockdown strictness Optimal lockdown

Computer study of the spectral characteristics of the disperse water methane system

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Chinese Physics B 2013年第12期22卷 238-242页

作者： A.Y.Galashev institute of Industrial Ecology Ural Branch Russian Academy of Sciences 62099S. Kovalevskaya Str. 20 Yekaterinburg Russia

The interaction of water clusters that adsorbed methane molecules with infrared radiation is studied by molecular dynamics. The presence of methane molecules in the disperse water system leads to an increase in absorption and emission of infrared radiation and a strong depletion of the Raman spectrum. In this case, the reflection coefficient of a monochromatic plane electromagnetic wave increases and its frequency spectrum significantly changes. The comparison of experimental data for similar characteristics of water, methane, or their mixtures is presented.

关键词： adsorption methane water cluster infrared and Raman spectra

Climate change evidence in tree growth and stand productivity at the upper treeline ecotone in the Polar Ural Mountains

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Forest Ecosystems 2020年第1期7卷 76-91页

作者： Nadezhda M.Devi Vladimir V.Kukarskih Аrina A.Galimova Valeriy S.Mazepa Andrey A.Grigoriev institute of Plant and Animal Ecology Ural BranchRussian Academy of Sciences8 Marta202/3Ekaterinburg 620144Russia

Background:Recent warming is affecting species composition and species areal distribution of many ***,although most treeline studies have estimated the rates of forest expansion into tundra,still little is known about the long-term dynamic of stand productivity at the forest-tundra ***,we make use of tree-ring data from 350 larch(Larix sibirica Ledeb.)and spruce(Picea obovata Ledeb.)sampled along the singular altitudinal treeline ecotone at the Polar Urals to assess the dynamic of stand establishment and productivity,and link the results with meteorological observations to identify the main environmental ***:The analysis of stand instalment indicated that more than 90%of the living trees appeared after *** this period,the stand became denser and moved 50m upward,while in recent decades the trees of both species grew *** maximum afforestation occurred in the last decades of the twentieth century,and the large number of encountered saplings indicates that the forest is still *** upward shift coincided with a slight increase of May-August and nearly doubling of September-April precipitation while the increase in growth matched with an early growth season warming(June+0.27°C per decade since 1901).This increase in radial growth combined with the stand densification led to a 6-90 times increase of biomass since ***:Tree-ring based twentieth century reconstruction at the treeline ecotone shows an ongoing forest densification and expansion accompanied by an increased *** changes are driven by climate change mechanism,whereby the leading factors are the significant increase in May-June temperatures and precipitation during the dormant *** of phytomass accumulation mechanisms within treeline ecotone is valuable for improving our understanding of carbon dynamics and the overall climate balance in current treeline ecosystems and for predicting how these will be altered by global ch

关键词： Polar Urals Treeline Productivity Climate change Radial growth Recruitment Larch Spruce

Corporate governance in generating companies of the russian electric power industry in the context of ESG agenda

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Global Energy Interconnection 2022年第5期5卷 512-523页

作者： Galina I.Sheveleva Melentiev Energy Systems institute of Siberian Branch of the russian academy of sciences 130 Lermontov St.Irkutsk 664033Russia

To address the issues of investment appeal in the russian electric power industry,this study analyzes the dynamics of corporate governance,including permanent redistribution of property and compliance with the russian Corporate Governance Code,in wholesale and territorial-generating *** increasing concentration of property in the hands of the state and its implications for investors are also *** study reveals the violations of essential principles,and the substantial differences in corporate governance practices,in the best-and worst-performing *** standards for better corporate governance practices to benefit the investors in the context of the current Environmental,Social,and corporate Governance(ESG)agenda are *** study provides a new insight at the development of corporate governance in russian power generating companies through property redistribution and compliance with corporate governance principles.

关键词： Corporate governance russian power generating companies ESG agenda