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Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum

Light(science & Applications) 2020年第1期9卷 1480-1487页

作者： Vasily Kravtsov Ekaterina Khestanova Fedor A.Benimetskiy Tatiana Ivanova Anton K.samusev Ivan s.sinev Dmitry Pidgayko Alexey M.Mozharov Ivan s.Mukhin maksim s.lozhkin Yuri V.Kapitonov Andrey s.Brichkin Vladimir D.Kulakovskii Ivan A.shelykh Alexander I.Tartakovskii Paul M.Walker Maurice s.skolnick Dmitry N.Krizhanovskii Ivan V.Iorsh ITMO University Saint Petersburg 197101Russia st.Petersburg Academic University Saint Petersburg 194021Russia saint Petersburg state University ul.Ulyanovskaya 1Saint Petersburg 198504Russia Institute of solid state Physics RASChernogolovka 142432Russia science Institute University of IcelandDunhagi 3IS-107ReykjavikIceland Department of Physics and Astronomy University of SheffieldSheffield S37RHUK

Optical bound states in the continuum(BICs)provide a way to engineer very narrow resonances in photonic *** extended interaction time in these systems is particularly promising for the enhancement of nonlinear optical processes and the development of the next generation of active optical ***,the achievable interaction strength is limited by the purely photonic character of optical ***,we mix the optical BIC in a photonic crystal slab with excitons in the atomically thin semiconductor Mose_(2) to form nonlinear exciton-polaritons with a Rabi splitting of 27 meV,exhibiting large interaction-induced spectral *** asymptotic BIC-like suppression of polariton radiation into the far field toward the BIC wavevector,in combination with effective reduction of the excitonic disorder through motional narrowing,results in small polariton linewidths below 3 *** with a strongly wavevector-dependent Q-factor,this provides for the enhancement and control of polariton–polariton interactions and the resulting nonlinear optical effects,paving the way toward tuneable BIC-based polaritonic devices for sensing,lasing,and nonlinear optics.

关键词： polar nonlinear continuum

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两类特殊故障源作用下函数元系统的可靠性评估

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控制与决策 2001年第2期16卷 159-162页

作者：邓北星 s A lozhkin 清华大学电子工程系北京100084 莫斯科国立大学计算数学与控制论学院莫斯科119899

证明了在故障源作用下无可靠输入数组的函数元系统的可靠性估计定理 ,建立了一种新的故障源模型 ,即具有可靠输入数组的常可靠故障源。利用概率分析方法研究了在这类故障源作用下 ,由函数单元构成的函数元系统的可靠性 ,给出了函数元系... 详细信息

证明了在故障源作用下无可靠输入数组的函数元系统的可靠性估计定理 ,建立了一种新的故障源模型 ,即具有可靠输入数组的常可靠故障源。利用概率分析方法研究了在这类故障源作用下 ,由函数单元构成的函数元系统的可靠性 ,给出了函数元系统可靠度的下界估计 ,阐明了在此类故障源作用下的单元函数不可能构成充分可靠的函数元系统。

关键词：故障源函数元系统可靠性评估 Neuman定理

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spatial and seasonal dynamics of soil loss ratio in mountain rangelands of south-western Kyrgyzstan

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Journal of Mountain science 2016年第2期13卷 316-329页

作者： maksim KULIKOV Udo sCHICKI-IOFF Peter BORCHARDT CEN Center for Earth system Research and sustainability Institute of Geography University of Hamburg Germany

Vegetation cover is the main factor of soil loss *** C-factor of the RUsLE(Revised Universal soil Loss Equation) was predicted with NDVI,ground data and exponential regression equation for mountain rangelands of *** series of C-factor,precipitation and temperature were decomposed into seasonal and trend components with sTL(seasonal decomposition by loess) to assess their interrelations.C-factor,precipitation and temperature trend components indicated significant lagged correlation,whereas seasonal components indicated more complex relations with climate factors which can be promoting as well as limiting factors for vegetation development,depending on the *** springs and hot summers may increase soil loss dramatically,whereas warm and dry springs with rainy summers can decrease *** slopes indicated higher soil loss ratio,whereas flat areas were better protected by vegetation.

关键词： soil loss ratio C-factor RUsLE NDVI Time series Remote sensing

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Education in cardiopulmonary resuscitation in Russia:A systematic review of the available evidence

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World Journal of Emergency Medicine 2017年第4期8卷 245-252页

作者： Alexei Birkun maksim Glotov Department of Anaesthesiology Resuscitation and Emergency MedicineMedical Academy named after S.I.Georgievskyof V.I.Vernadsky Crimean Federal UniversitySimferopol 295051Russian Federation

BACKGROUND: To summarise and appraise cumulative published scientific evidence relevant to cardiopulmonary resuscitation(CPR) education in *** REsOURCEs: We searched Medline, scopus, science Direct and Russian science Citation Index databases from December 1991 to December 2016 to identify studies pertaining to the field of CPR education that were carried out by Russian researchers and/or investigated the topic of interest for Russia/Russian population. Reference lists of eligible publications, contents pages of relevant Russian journals and Google scholar were also searched. There was no limitation based on publication language or study ***: Of 7 964 unique citations identified, 22 studies were included. All studies were published from 2009 to 2016, mainly in Russian. Only three studies were reported to be randomized controlled. Non-medical individuals constituted 17% of studied populations. Most of the studies aimed to assess effects of CPR educational interventions, generally suggesting positive influence of the training conducted. The studies were highly heterogeneous as for methodological approaches, structure and duration of educational interventions, evaluation methods and criteria being used. Methodological quality was generally poor, with >40% publications not passing quality screening and only 2 studies meeting the criteria of moderate high ***: The results suggest paucity, low population coverage, high thematic and methodological heterogeneity and low quality of the studies addressing CPR education, which were carried out in the Russian Federation. There is a critical need in conducting methodologically consistent, large-scale, randomized, controlled studies evaluating and comparing efficiency of educational interventions for teaching CPR in different population categories of Russia.

关键词： Cardiac arrest Cardiopulmonary resuscitation Education Training Russia

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Test Time Minimization for Hybrid BIsT of Core-Based systems

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Journal of Computer science & Technology 2006年第6期21卷 907-912页

作者： Gert Jervan Petru Eles Zebo Peng Raimund Ubar maksim Jenihhin Embedded systems Laboratory (EsLAB) Linkoeing University Sweden Department of Computer Engineering Tallinn University of Technology Estonia

This paper presents a solution to the test time minimization problem for core-based systems. We assume a hybrid BIsT approach, where a test set is assembled, for each core, from pseudorandom test patterns that are generated online, and deterministic test patterns that are generated off-line and stored in the system. In this paper we propose an iterative algorithm to find the optimal combination of pseudorandom and deterministic test sets of the whole system, consisting of multiple cores, under given memory constraints, so that the total test time is minimized. Our approach cmploys a fast estimation methodology in order to avoid exhaustive search and to speed-up the calculation process. Experimental results have shown the efficiency of the algorithm to find near optimal solutions.

关键词： soC self-test hybrid BIsT

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Algorithm for the layout of a piezoelectric element in an elastic medium providing the maximal piezoelectric effect within a specified frequency range

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International Journal of smart and Nano Materials 2019年第4期10卷 268-284页

作者： Dmitrii Oshmarin Nataliia Iurlova Natalia sevodina maksim Iurlov Department of complex problems of deformable solids mechanics Institute of Continuous Media Mechanics of the Ural Branch of RASPermRussian Federation

An algorithm for the layout of a piezoelectric that provides the most efficient performance within a specified range of vibration frequencies is proposed in this *** algorithm is based on the consideration of a special parameter within the area of a piezoelectric element’s possible *** parameter characterizes the superposition of electromechanical coupling coefficients’for all the natural vibration frequencies included in a specified frequency *** condition for defining the best option for location of the piezoelectric element in the case of several equivalent positions is *** efficiency of the proposed algorithm is shown *** electromechanical coupling coefficients were calculated numerically based on solution to the problem of natural vibrations for electroelastic bodies using a finite element *** calculations were performed to define the best location for a single piezoelectric element at the surface of a thin-walled shell having a half-cylindrical *** results are presented for natural vibration frequencies within the frequency range from 0 up to 1100 *** numerical results were obtained by solving the problem of natural vibrations with a finite element method using the ANsYs software package.

关键词： Piezoelectric element’s layout natural vibrations continuous frequency range electromechanical coupling coefficient

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The influence of collision energy on magnetically tuned^(6)Li-^(6)Li Feshbach resonance

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Chinese Physics B 2022年第6期31卷 326-333页

作者： Rong Zhang Yong-Chang Han shu-Lin Cong maksim B shundalau Department of Physics Dalian University of TechnologyDalian 116024China DUT-BsU Joint Institute Dalian University of TechnologyDalian 116024China Physics Department Belarusian State UniversityMinskBelarus

The effect of collision energy on the magnetically tuned^(6)Li-^(6)Li Feshbach resonance(FR)is investigated theoretically by using the coupled-channel(CC)method for the collision energy ranging from 1μK·kBto 100μK·*** the collision energy of 1μK·kB,the resonance positions calculated are 543.152 Gs(s wave,the unit 1 Gs=10^(-4)T),185.109 Gs(p wave|ml|=0),and 185.113 Gs(p wave|ml|=1),*** p-wave FR near 185 Gs exibits a doublet structure of 4 mGs,associated with dipole-dipole *** the increase of the collision energy,it is found that the splitting width remains the same(4 mGs),and that the resonance positions of s and p waves are shifted to higher magnetic fields with the increase of collision *** variations of the other quantities including the resonance width and the amplitude of the total scattering section are also discussed in *** thermally averaged elastic rate coefficients at T=10,15,20,25 K are calculated and compared.

关键词： Feshbach resonance collision energy ^(6)Li-^(6)Li system

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Mountain Pastures and Grasslands in the sW Tien shan,Kyrgyzstan-Floristic Patterns,Environmental Gradients,Phytogeography,and Grazing Impact

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Journal of Mountain science 2011年第3期8卷 363-373页

作者： BORCHARDT Peter sCHICKHOFF Udo sCHEITWEILER sabrina KULIKOV maksim University of Hamburg Institute of Geography

Vast grasslands are found in the walnut-fruit forest region of southern Kyrgyzstan,Middle *** above the worldwide unique walnutfruit forests and used for grazing,they play a pivotal role in the mixed mountain agriculture of local ***,these pastures are subject to an increasing utilization pressure reflecting the changing political and social conditions in the transformation process from a soviet republic to an independent state.A first detailed analysis of mountain pasture vegetation in the Ferghana Range answers the following questions:What are the main plant community types among Kyrgyzstan's mountain pastures? What are the main environmental gradients that shape their species composition? Which phytogeographical distribution types are predominant? How does grazing affect community composition and species richness in these grasslands? species composition was classified by cluster analysis;underlying environmental gradients were explored using DCA.A dataset of 395 relevés was used for classification,and a subset of 79 relevés was used in a DCA to analyze the correlation between vegetation,environment,and grazing *** investigated pastures were classified into four distinctive plant *** site factors altitude,heat load,inclination and grazing impact were found to be the major determinants of the vegetation pattern.A significant overlap between floristic composition and structural and spatial properties was *** majority of the species pool consisted of Middle Asian endemics and Eurosiberian ***,disturbance-tolerant species played a significant role with respect to species composition and coverage of the herbaceous layer in vast areas of southern Kyrgyzstan's mountain *** general,an intense grazing impact is clearly reflected by both species composition and structural variables of plant *** highly diverse and unique ecosystem is modified by an increasing utilization *** order to ma

关键词： Central Asia Classification Endemics Gradient Analysis Grazing impact Middle Asia Pasture Management Ruderals Transformation Process Walnut-fruit forest.

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Modelling soil erodibility in mountain rangelands of southern Kyrgyzstan

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Pedosphere 2020年第4期30卷 443-456页

作者： maksim KULIKOV Udo sCHICKHOFF Alexander GRONGROFT Peter BORCHARDT Centrum für Erdsystemforschung und Nachhaltigkeit(CEN) Center for Earth System Research and SustainabilityInstitute of GeographyUniversity of HamburgHamburg D-20146(Germany) Centrum für Erdsystemforschung und Nachhaltigkeit(CEN) Center for Earth System Research and SustainabilityInstitute of Soil ScienceUniversity of HamburgHamburg D-20146(Germany)

soil erosion in mountain rangelands in Kyrgyzstan is an emerging problem due to vegetation loss caused by overgrazing. It is further exacerbated by mountain terrain and high precipitation values in Fergana range in the south of Kyrgyzstan. The main objective of this study was to map soil erodibility in the mountainous rangelands of Kyrgyzstan. The results of this effort are expected to contribute to the development of soil erodibility modelling approaches for mountainous areas. In this study, we mapped soil erodibility at two sites, both representing grazing rangelands in the mountains of Kyrgyzstan and having potentially different levels of grazing pressure. We collected a total of 232 soil samples evenly distributed in geographical space and feature space. Then we analyzed the samples in laboratory for grain size distribution and calculated soil erodibility values from these data using the Revised Universal soil Loss Equation (RUsLE) K-factor formula. After that, we derived different terrain indices and ratios of frequency bands from AsTER GDEM and LANDsAT images to use as auxiliary data because they are among the main soil forming factors and widely used for prediction of various soil properties. soil erodibility was significantly correlated with channel network base level (geographically extrapolated altitude of water channels), remotely sensed indices of short-wave infrared spectral bands, exposition, and slope degree. We applied multiple regression analysis to predict soil erodibility from spatially explicit terrain and remotely sensed indices. The final soil erodibility model was developed using the spatially explicit predictors and the regression equation and then improved by adding the residuals. The spatial resolution of the model was 30 m, and the estimated mean adjusted coefficient of determination was 0.47. The two sites indicated different estimated and predicted means of soil erodibility values (0.035 and 0.039) with a 0.05 significance level, which i

关键词： channel network base level K-factor LANDsAT RUsLE soil enhancement ratio soil mapping slope terrain

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Russian and the Us in space Relations in the 2010s:between Competition and Cooperation

Russian and the US in Space Relations in the 2010s:between C...

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作者： Komov maksim 华东师范大学

学位级别：硕士

本研究旨在确定俄美政策如何影响两国在空间领域的伙伴关系。空间主题的重要性是由许多公共和私人国际关系对象的利益所决定的。在本人的研究中,我试图追查所选择的政治路线与空间领域之间的相互依存的关系。本文采用比较分析方法作为... 详细信息

本研究旨在确定俄美政策如何影响两国在空间领域的伙伴关系。空间主题的重要性是由许多公共和私人国际关系对象的利益所决定的。在本人的研究中,我试图追查所选择的政治路线与空间领域之间的相互依存的关系。本文采用比较分析方法作为本研究的基础,可以回答本研究的主要问题,并可以追踪空间政策的形成主要是受两国总统影响、还是受较低层次的官员决策影响的问题。本文实证部分采用了可靠的文献资料:我使用并分析了官方高级会议的正式文件、简报和摘要、权威专家的文章以及新闻资源。对21世纪俄美总统关于空间政策的相关信息的分析使本人得出结论:美国与俄罗斯之间的伙伴关系将继续保持,但将发生变化,因为政治领导人直接影响空间政策的形成。人所共知,政治领导人对解决问题的看法不同,这也会直接影响到空间领域的合作。

关键词：总统的影响力空间关系太空伙伴关系

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