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New insights in remote sensing applications to obtain information about water bodies
Earth from Space. 2015.
Multi-year experience of applying ERS data at the Hydrology Department of the Lomonosov Moscow State University demonstrated their high information value and efficiency when addressing a variety of global and local hydrological tasks. They can be extremely useful in determining the status of water bodies of different scale, parameterizations of different river runoff characteristics in order to highlight the ranges of their change, corresponding to dangerous hydrological events, in assessing the impact of climate change on water resources and the nature of hydrological processes.
Levashev V., / Series arXiv "math". 2026. No. 2609.06010.
We prove that continuous A-bilinear pairings on the ring of Laurent series that are invariant under continuous automorphisms coincide, up to a constant, with the pairing given by the residue of a differential form over any commutative associative ring with identity. ...
Added: September 24, 2026
Pyatov P. N., Pivovarov P. A., / Series math "arxiv.org". 2026. No. 2609.06274.
We investigate a special ansats that allows for an iterative solution of the constant Yang-Baxter equation. Testing this ansatz, we construct four sequences of the constant R-matrices. In each sequence the R-matrices act on the tensor squares of vector spaces of linearly growing dimensions. Each R-matrix also depends on a single complex parameter.
By analyzing the ...
Added: September 24, 2026
Medvedev V., / Series arXiv "math". 2026.
We study complete static manifolds with boundary admitting a nowhere-vanishing static potential. Our main result shows that, under a natural lower bound relating the scalar curvature and the boundary mean curvature, a simple static manifold with boundary must in fact have positive scalar curvature, negative boundary mean curvature, and be compact; we also obtain explicit ...
Added: September 19, 2026
Poddiakov A., / Series Social Science Research Network "Social Science Research Network". 2026. No. 7437658.
Clarity of knowledge and reasoning is necessary in many cases. Yet vagueness in scientific thinking related to surprise, curiosity, "ability to engage with not-knowing" (de Freitas) and abductive reasoning is also a crucially important source of scientific creativity which supplements combinatorial logic when dealing with the already known. Starting from studies by C. S. Peirce ...
Added: September 15, 2026
Glutsyuk A., / Series arXiv "math". 2026.
B.Josephson (Nobel Prize, 1973) predicted a tunnelling effect for a system of two superconductors separated by a narrow dielectric (such a system is called Josephson junction): existence of a supercurrent through it and equations governing it. The overdamped Josephson junction is modeled by the family of differential equations on the 2-torus, dθdτ=1ω(cosθ+B+Acosτ), which is known as ...
Added: September 8, 2026
Pochinka O., Shmukler V., / Series math.RT "arXiv:1808.06395 [math.RT]". 2026.
Anosov flows have a long and rich history, firstly motivated by the
study of geodesic flows in negative curvature surface by Anosov and Sinai.
Not every closed manifold admits an Anosov flow for well-known reasons:
the fundamental group of a 3-manifold M admitting an Anosov flow must
have exponential growth, and M must be universally covered by R3. Nevertheless,
there ...
Added: August 31, 2026
Loubenets E. R., / Series arxiv.org "quant-ph". 2026. No. 2607.18050.
In many quantum applications it is important to know whether or not a Bell nonlocal two-qudit state exhibits its nonlocality under correlation scenarios with some given numbers S1,S2≥1 of generalized quantum measurements at two sites. In the present article, we find analytically a new general locality condition sufficient for a nonseparable Werner state with a ...
Added: July 21, 2026
Bolbachan V., / Series math "arxiv.org". 2024.
Chow polylogarithms are some special functions arising in explicit description of the Beilinson regulator map. The most interesting functional equation for this function reflects its vanishing on the boundary in the Bloch's cycle complex. We show that this functional equation formally follows from more simple ones, namely skew-symmetry, functoriality and multiplicativity.
To prove this, we study ...
Added: July 16, 2026
Bolbachan V., / Series math "arxiv.org". 2024.
Let K be a field of characteristic zero. We prove that its motivic cohomology in degree m−1 and weight m is rationally isomorphic to the cohomology of the polylogarithmic complex. This gives a partial extension of A. Suslin theorem describing the indecomposable K3 of a field. ...
Added: July 16, 2026
Panov V., Ryabchenko A., / Series arXiv "stat.ME". 2026. No. 2607.05048.
This paper investigates the problem of statistical inference for a mixture distribution consisting of a discrete and a continuous component, with a particular focus on the class of rational-infinitely divisible distributions. We consider non-parametric estimation of both components of the mixture as well as the quasi-L{é}vy measure, assuming that the mixture belongs to the class ...
Added: July 9, 2026
Konakov V., Kucher D., Mammen E., / Series arXiv "math". 2026. No. 2606.11142v1.
In this paper, we construct strong approximations for discrete-time Markov chains weakly converging to continuous diffusion processes, as well as for their perturbed counterparts. Under the assumption of bounded coefficients, we construct closely coupled versions of these processes on a shared probability space. In particular, for both non-degenerate and degenerate cases, we maximize the probability ...
Added: June 11, 2026
Dorovskiy A., / Series arXiv "math". 2026.
In this paper the structural stability of generic families of vector fields of the PC-HC class on the two-dimensional sphere is proved. A classification of these families up to moderate equivalence in neighborhoods of their large bifurcation supports is presented, based on such invariants as the configuration and the characteristic set. The realization lemma is proved. ...
Added: May 14, 2026
Taletskii D., / Series arXiv "math". 2026.
A vertex subset of a graph is called a \textit{distance-$k$ independent set} if the distance between any two of its distinct vertices is at least $k + 1$. For all $n,k \geq 1$, we determine the minimum possible number of inclusion-wise maximal distance-$k$ independent sets among all $n$-vertex trees. It equals~$n$ if $n \leq k ...
Added: May 1, 2026
Ovcharenko M., / Series arXiv "math". 2026.
We introduce an explicit class of tempered Laurent polynomials in the sense of Villegas and Doran--Kerr in n⩽4 variables including all Landau--Ginzburg models for smooth Fano threefolds with very ample anticanonical class. We check that it contains Landau--Ginzburg models for various Fano fourfolds which are complete intersections in smooth toric varieties and Grassmannians of planes, ...
Added: April 30, 2026
Zlotnik Alexander, / Series arXiv "math". 2026. No. 2602.03481v1.
We deal with the global in time weak solutions to the 1D compressible Navier-Stokes system of equations for large discontinuous initial data and nonhomogeneous boundary conditions of three standard types. We prove the Lipschitz-type continuous dependence of the solution $(\eta,u,\theta)$, in a norm slightly stronger than $L^{2,\infty}(Q)\times L^2(Q)\times L^2(Q)$, on the initial data $(\eta^0,u^0,e^0)$ in a ...
Added: April 18, 2026
Zotov L., Орехова А. А., Фролова Н. Л., В кн.: Системы контроля окружающей среды – 2025 / Тезисы докладов Международной научно-практической конференции. – Севастополь, 10 – 13 ноября 2025 г.: Севастополь: ИП Куликов А.С., 2025. С. 82–82.
Миссии GRACE (2002-2017) и GRACE-FO (2018 – по настоящее время) основаны на паре
спутников-близнецов, следующих друг за другом с интервалом в 230 км на высоте 450 км над
Земной поверхностью. Измерения дальности и ее производной осуществляются
микроволновыми и лазерными дальномерами и, вместе с данными акселерометра, GPS,
звездных датчиков и др, дают после обработки ежемесячные разложения гравитационного
поля Земли по сферическим ...
Added: February 19, 2026
Zotov L., Фролова Н. Л., Орехова А. А. et al., В кн.: Арчиковские чтения - 2025: синтез географической науки, прикладных исследований, опыта и молодости. Материалы Всероссийской с международным участием научно-практической конференции, посвящённой 100-летию учёного-географа, педагога, организатора высшей географической школы в Чувашии, доктора географических наук, профессора Е.И. Арчикова, 180-летию Русского географического общества, 80-й годовщине Победы в Великой Отечественной войне.: Чебоксары: Чувашский государственный университет им. И.Н. Ульянова, 2025.
Спутники GRACE и GRACE-FO предоставляют данные о ежемесячных изменениях гравитационного поля Земли и являются одними из самых успешных миссий NASA/DLR в последние десятилетия. Мы применяем многоканальный сингулярный спектральный анализ (МССА) для фильтрации данных по гравитационному полю JPL Level 2 release 6.3 и накладываем маски бассейнов рек из гидрологической базы STN-30p. Это позволяет получить главные компоненты ...
Added: February 2, 2026
Zotov L., Orehova A. A., Frolova N. L. et al., , in: Информационные технологии и нанотехнологии (ИТНТ-2025) : материалы XI междунар. конф. и молодеж. шк.: Самарский университет, 2025. P. 149–150.
The GRACE and GRACE-FO satellites provide data on the Earth's gravitational field changes and are among the most successful NASA/DLR geodetic missions in recent decades. We use multichannel singular spectral analysis (MSSA) to filter JPL Level 2 release 6.3 data on gravity field and apply river basins masks from Simulated Topological Network (STN-30p) database. We ...
Added: February 2, 2026
М.: Библиотека журнала «Исследователь/Researcher», 2024.
Серия «Антология Всероссийского конкурса юношеских исследовательских работ им. В.И. Вернадского» включает наиболее интересные исследования школьников и рецензии специалистов на эти работы за последнее десятилетие. Каждое издание серии посвящено определенному направлению в области естественных наук. В сериях Антологии размещены фотографии природы, флоры и фауны разных континентов из собрания платформы «Золотая Черепаха», которые любезно предоставлены Благотворительным фондом ...
Added: April 21, 2025
Prozumentik K. V., Технологос 2024 № 3 С. 59–74
The article reconstructs Kant's views on the problem of forgiveness. Despite the fact that the German philosopher speaks very little about forgiveness in his texts, showing remarkable restraint with regard to this topic, in the corpus of his works, nevertheless, one can find enough indirect indications that the problem of forgiveness was significant for him. ...
Added: January 30, 2025
Юшкин В. Д., Zotov L., Басманов А. В. et al., Геодезия и картография 2021 № 11 С. 8–15
The article is devoted to the study of changes in the values of gravitational accelerations at the Russian comparison’s sites of the absolute gravimeters “Pulkovo”, “Svetloye” and “Zvenigorod” for the 2007 to 2013 period. Significant increase of the values instead of the expected decrease was obtained. The article attempts to understand the reasons for their ...
Added: November 26, 2021
Фролова Н. Л., Белякова П. А., Григорьев В. Ю. et al., Regional Environmental Change 2017 Vol. 17 P. 1965–1976
The Selenga River has historically provided 50% of the total freshwater water input to the Lake Baikal, transporting substances and pollutants that can considerably impact the unique lake ecosystem. In the context of on-going regional to global change, we here aim at identifying and understanding mechanisms behind spatial and temporal variability and trends in the ...
Added: February 27, 2018
Zotov L., Фролова Н. Л., Белякова П. А. et al., Водные ресурсы 2017 Т. 44 № 3 С. 243–255
Рассмотрены особенности многолетних колебаний стока рек бассейна Селенги, а также осадков, испаряемости и бассейновых влагозапасов. На основе обработки данных наземных (1932–2015 гг.) и спутниковых наблюдений (2002–2015 гг.), а также анализа литературных данных сделаны выводы о наличии внутривековых циклов в рядах годового и минимального стока. В бассейне Селенги, по сравнению с 1934–1975 гг., отмечаются общие тенденции ...
Added: March 1, 2017
Фролова Н. Л., Григорьев В. Ю., Харламов М. А., Вестник Московского университета. Серия 5: География 2015 № 4 С. 27–33
Рассмотрена возможность использования данных спутниковой гравиметрии, полученных в ходе эксперимента Gravity Recovery and Climate Experiment (GRACE), для решения различных гидрологических задач. Месячные изменения гравитационного поля Земли на суше предыдущими исследователями в значительной степени были отнесены движению водных масс внутри континентальной части гидрологического цикла. Технология GRACE позволяет получать реальные данные об изменении водных ресурсов суши при ...
Added: November 24, 2015