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冰岛东部最美小镇白日梦想家们的隐世仙境

环球人文地理 2024年第13期 144-153页

作者：邓文倩 vladimir marieagns Nataliya Fotokon Sen Isabel Baldovi Marc Jedamus Kristina Ryan Unsplash 摄图网

冰岛东部峡湾，有一个小镇被群山、瀑布环绕，远离城市喧嚣，宛如被时间遗忘的世外桃源。在电影《白日梦想家》中，男主角沃尔特为了找到杂志新刊的底片，踏上了一段奇幻冒险旅程。他在影片里看似穿越了格陵兰岛、冰岛、尼泊尔、喜马拉...

冰岛东部峡湾，有一个小镇被群山、瀑布环绕，远离城市喧嚣，宛如被时间遗忘的世外桃源。在电影《白日梦想家》中，男主角沃尔特为了找到杂志新刊的底片，踏上了一段奇幻冒险旅程。他在影片里看似穿越了格陵兰岛、冰岛、尼泊尔、喜马拉雅山脉……但实际上整部电影的取景地全都在冰岛。影片最令人印象深刻的部分，大概是沃尔特用公仔和小孩子交换滑板后，在一条盘山公路上急速滑行。公路的尽头就是被LonelyPlanet评为“冰岛东部最美小镇”的塞济斯菲厄泽。

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Impact of normal stress-induced closure on laboratory-scale solute transport in a natural rock fracture

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Journal of Rock Mechanics and Geotechnical Engineering 2020年第4期12卷 732-741页

作者： Liangchao Zou vladimir Cvetkovic Division of Resources Energy and InfrastructureDepartment of Sustainable DevelopmentEnvironmental Science and EngineeringRoyal Institute of TechnologyStockholm10044Sweden Department of Physical Geography Stockholm UniversityStockholm10691Sweden

The impact of normal stress-induced closure on fluid flow and solute transport in a single rock fracture is demonstrated in this *** fracture is created from a measured surface of a granite rock *** Bandis model is used to calculate the fracture closure due to normal stress,and the fluid flow is simulated by solving the Reynold *** Lagrangian particle tracking method is applied to modeling the advective transport in the *** results show that the normal stress significantly affects fluid flow and solute transport in rock *** causes fracture closure and creates asperity contact areas,which significantly reduces the effective hydraulic aperture and enhances flow ***,the reduced aperture and enhanced channeling affect travel time *** particular,the enhanced channeling results in enhanced first arriving and tailing behaviors for solute *** fracture normal stiffness correlates linearly with the 5th and 95th percentiles of the normalized travel *** finding from this study may help to better understand the stress-dependent solute transport processes in natural rock fractures.

关键词： Normal stress Fluid flow Solute transport Stiffness Particle tracking

用于创建数据库和分析冬季运动项目运动员训练信息的技术——以北欧两项为例

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北京体育大学学报 2024年第2期47卷 149-153页

作者：弗拉基米尔·泽布泽耶夫崔明坤(译) 柴可夫斯基国立体育学院俄罗斯柴可夫斯基617740 北京体育大学教育学院中国北京100084

现代体育的显著特点是竞争异常激烈。运动员为了取得最高成绩,往往会进行超负荷的训练[1-3]。运动训练的效率主要取决于对运动员状态信息进行收集、系统化和存储的质量。为了达到这些目的,近年来人们开始使用数据库,它可以将信息存储在... 详细信息

现代体育的显著特点是竞争异常激烈。运动员为了取得最高成绩,往往会进行超负荷的训练[1-3]。运动训练的效率主要取决于对运动员状态信息进行收集、系统化和存储的质量。为了达到这些目的,近年来人们开始使用数据库,它可以将信息存储在计算机系统中,而不是零散地存储在纸质或电子媒介中。如此一来,就可以大大提高决策的效率,这在运动员训练和竞技过程中不断产生大量信息流的情况下尤为重要。

关键词：信息存储现代体育计算机系统运动员训练数据库电子媒介信息流冬季运动项目

On finite 2-groups all of whose subgroups are mutually isomorphic

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Science China Mathematics 2009年第2期52卷 254-260页

作者： EPULIC vladimir Faculty of Electrical Engineering and Computing University of Zagreb

In this paper we investigate the title groups which we call isomaximal. We give the list of all isomaximal 2-groups with abelian maximal subgroups. Further, we prove some properties of isomaximal 2-groups with nonabelian maximal subgroups. After that, we investigate the structure of isomaximal groups of order less than 64. Finally, in Theorem 14. we show that the minimal nonmetacyclic group of order 32 possesses a unique isomaximal extension of order 64.

关键词： p-groups maximal subgroups minimal nonabelian minimal nonmetacyclic 20D15

Powerful terahertz waves from long-wavelength infrared laser filaments

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Light(Science & Applications) 2020年第1期9卷 204-219页

作者： vladimir Yu.Fedorov Stelios Tzortzakis Science Program Texas A&M University at QatarP.O.Box 23874DohaQatar P.N.Lebedev Physical Institute of the Russian Academy of Sciences 53 Leninskiy ProspektMoscow 119991Russia Institute of Electronic Structure and Laser(IESL) Foundation for Research and Technology-Hellas(FORTH)P.O.Box 1527Heraklion GR-71110Greece Department of Materials Science and Technology University of CreteHeraklion GR-71003Greece

Strong terahertz(THz)electric and magnetic transients open up new horizons in science and *** review the most promising way of achieving sub-cycle THz pulses with extreme field *** the nonlinear propagation of two-color mid-infrared and far-infrared ultrashort laser pulses,long,and thick plasma strings are produced,where strong photocurrents result in intense THz *** corresponding THz electric and magnetic field strengths can potentially reach the gigavolt per centimeter and kilotesla levels,*** intensities of these THz fields enable extreme nonlinear optics and relativistic *** offer a comprehensive review,starting from the microscopic physical processes of light-matter interactions with mid-infrared and far-infrared ultrashort laser pulses,the theoretical and numerical advances in the nonlinear propagation of these laser fields,and the most important experimental demonstrations to date.

关键词： laser extreme optics

Example-based dynamic façade design using the façade daylighting performance improvement(FDPI)indicator

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Building Simulation 2023年第12期16卷 2261-2283页

作者： Luka Akimov Andrey Bezborodov vladimir Badenko Peter the Great Saint-Petersburg Polytechnic University 29 Polytechnicheskaya st.St.Petersburg195251Russian Federation Politecnico di Milano 32 Piazza Leonardo da VinciMilano20133Italy

It remains challenging to conduct an efficient dynamic façade *** this article authors try to address this issue introducing the façade daylighting performance improvement(FDPI)indicator aimed to evaluate the performance of a dynamic(adaptive)façade from its daylighting performance point of *** illustrate the FDPI application the authors introduced the preliminary dynamic façade concept for an office building located in Tel Aviv(Hot-summer Mediterranean Climate Csa)with further shape modification based on the daylighting performance analysis compared to the three alternatives representative of different typologies of dynamic faç*** Bahr,One Ocean and The University of Southern Denmark façade systems were simulated under the same weather and building conditions of the preliminary dynamic façade concept and were considered as a benchmark for the *** final dynamic façade concept elaborated by the authors in the preliminary comparative workflow showed noticeable daylight performance improvement with respect to the case studies comparative *** FDPI metric allowed to estimate a daylighting performance improvement of 43%of the final dynamic façade concept over the case study dynamic façade that showed the best performance in the daylighting simulations.

关键词： dynamic façade adaptive façade daylight performance performance evaluation façade daylighting performance Improvement

The non-Gaussian distribution of galaxy gravitational fields

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Research in Astronomy and Astrophysics 2017年第12期17卷 1-14页

作者： vladimir Stephanovich Wlodzimierz Godlowski Uniwersytet Opolski Institute of Physicsul.Oleska 4845-052 OpolePoland

We perform a theoretical analysis of the observational dependence between angular momentum of galaxy clusters and their mass（richness）, based on the method introduced in our previous *** that we obtain the distribution function of gravitational fields for astronomical objects（like galaxies and/or smooth halos of different kinds） due to their tidal interaction. By applying the statistical method of Chandrasekhar, we are able to show that the distribution function is determined by the form of interaction between objects and for multipole（tidal） interaction it is never Gaussian. Our calculation permits demonstrating how the alignment of galaxy angular momenta depends on cluster richness. The specific form of the corresponding dependence is due to assumptions made about cluster morphology. Our approach also predicts the time evolution of stellar object angular momenta within CDM and ΛCDM models. Namely, we have shown that angular momentum of galaxies increases with time.

关键词： galaxies:general galaxies:formation

Some Limit Theorems for a Particle System of Single Point Catalytic Branching Random Walks

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Acta Mathematica Sinica,English Series 2007年第6期23卷 997-1012页

作者： vladimir VATUTIN Jie XIONG Steklov Mathematical Institute Gubkin street 8 119991 Moscow Russia Department of Mathematics University of Tennessee Knoxville TN 37996 1300 USA Department of Mathematics Hebei Normal University Shijiazhuang 050016 P. R. China

We study the scaling limit for a catalytic branching particle system whose particles perform random walks on Z and can branch at 0 only. Varying the initial （finite） number of particles, we get for this system different limiting distributions. To be more specific, suppose that initially there are n^β particles and consider the scaled process Zt^n（·） = Znt（√n·）, where Zt is the measure-valued process 1 and to a representing the original particle system. We prove that Ztn converges to 0 when β 〈1/4 and to a nondegenerate discrete distribution when β=1/*** addition,if 1/4〈β〈1/2 then n-^（2β-1/2）Zt^n converges to a random limit,while if β 〉21then n^-βZtn converges to a deterministic limit.

关键词： Renewal equation branching particle system scaling limit

Improved theory of generalized meteo-ballistic weighting factor functions and their use

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Defence Technology（防务技术） 2016年第3期12卷 242-254页

作者： vladimir CECH Jiri JEVICKY Department of Weapons and Ammunition University of Defence Oprox Inc. Department of Mathematics and Physics University of Defence

It follows from the analysis of artillery fire errors that approximately two-thirds of the inaccuracy of indirect artillery fire is caused by inaccuracies in the determination of the meteo parameters included in fire error budget *** calculated under non-standard conditions are considered to be *** tools utilized for the analysis of perturbed trajectories are weighting factor functions(WFFs)which are a special kind of sensitivity *** are used for calculation of meteo ballistic elements B(ballistic wind w B,densityρB,virtual temperatureτB,pressure p B)as *** have found that the existing theory of WFF calculation has several significant *** aim of the article is to present a new,improved theory of generalized WFFs that eliminates the deficiencies *** this theory will improve methods for designing firing tables,fire control systems algorithms,and meteo message generation algorithms.

关键词： Exterior ballistic Non-standard projectile trajectory Perturbation Meteoconditions Sensitivity function (Generalized) weighting (factor) function(curve) (Generalized) effect function Norm effect