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Реализация рентгеновских томографических схем с применением различных кристаллов-монохроматоров
Заводская лаборатория. Диагностика материалов. 2011. Т. 77. № 10. С. 41–44.
Геранин А. С., Buzmakov A. V., Volkov Y. O., Zolotov D. A., Roshchin B. S., Якимчук И. В., Asadchikov V. E., Smirnov I. S., Shkurko V. N.
Shabanov N., Kuricheva O., Kurbatova J. et al., / Series Working Papers SSRN "Department of Economics Ca’ Foscari University of Venice". 2026.
The carbon balance of an ecosystem is the difference between Gross Primary Productivity (GPP) and Ecosystem Respiration (Reco) as expressed by Net Ecosystem Exchange (NEE). While remote sensing retrievals of GPP have reached maturity, Reco estimation remains underexplored and ultimately cast bias on NEE. Here we present an end-to-end multi-scale analysis of the mechanism of ...
Added: August 21, 2026
Ponomarenko A., / Series Computer Science "arxiv.org". 2025.
This paper addresses the challenge of merging hierarchical navigable small world (HNSW) graphs, a critical operation for distributed systems, incremental indexing, and database compaction. We propose three algorithms for this task: Naive Graph Merge (NGM), Intra Graph Traversal Merge (IGTM), and Cross Graph Traversal Merge (CGTM). These algorithms differ in their approach to vertex selection ...
Added: July 30, 2026
Piontkovski D., / Series arXiv "math". 2026.
A noncommutative projective variety is defined, following Artin and Zhang, by a graded coherent algebra 𝐴. The category of coherent sheaves is then the quotient qgr(𝐴) of the category of finitely presented graded modules by the subcategory of torsion modules. We consider the categorical and polynomial entropies of the Serre twist, that is, of the ...
Added: June 23, 2026
Piontkovski D., / Series arXiv "math". 2025.
If a symmetric multilinear algebra is weakly nil, then it is Engel. This result may be regarded as an infinite-dimensional analogue of the well-known Jacobian theorem, which states that if a polynomial mapping has a polynomial inverse, then its Jacobian matrix is invertible. This refines a theorem of Gerstenhaber and partially answers a question posed ...
Added: June 23, 2026
Shipilov F., Barnyakov A., Ivanov A. et al., / Series Physics "arxiv.org". 2026.
A fast simulation of the detector response is a vital task in high-energy physics (HEP). Traditional Monte-Carlo methods form the backbone of modern particle physics simulation software but are computationally expensive. We present a machine-learning-based approach to fast simulation of the Focusing Aerogel Ring Imaging Cherenkov (FARICH) detector response. Given a particle track and momentum, ...
Added: May 19, 2026
Гущина В. А., / Series chemrxiv-2023-vpzhz-v2 "ChemRxiv". 2023.
All-inorganic perovskite CsPbBr3 and Cs4PbBr6 nanoparticles are being intensively studied due to their unique properties and wide range of applications; however, however, the nature of their optical properties is not yet fully understood due to the difficulty of synthesis of singlephase nanoparticles. In this article we describe the features of the synthesis of single-phase particles ...
Added: May 14, 2026
Derkacheva A., Sakirkina M., Kraev G. et al., /. 2026.
Comprehensive data on natural hazards and their consequences are crucial for effective for risk assessment, adaptation planning, and emergency response. However, many countries face challenges with fragmented, inconsistent, and inaccessible data, particularly regarding local-scale events. To address this data gap in Russia, we developed an end-to-end processing pipeline that scrapes news from various online sources, ...
Added: April 28, 2026
Pilé I., Deng Y., Shchur L., / Series arXiv "math". 2026. No. 2604.10254.
We investigate the spatial overlap of successive spin configurations in Markov chain Monte Carlo simulations using the local Metropolis algorithm and the Svendsen-Wang and Wolff cluster algorithms. We examine the dynamics of these algorithms for two models in different universality classes: the Ising model and the Potts model with three components. The overlap of two ...
Added: April 20, 2026
Gabdullin N., Androsov I., / Series Computer Science "arxiv.org". 2026.
Label prediction in neural networks (NNs) has O(n) complexity proportional to the number of classes. This holds true for classification using fully connected layers and cosine similarity with some set of class prototypes. In this paper we show that if NN latent space (LS) geometry is known and possesses specific properties, label prediction complexity can ...
Added: April 2, 2026
Sorokin K., Beketov M., Онучин А. et al., / arxiv.org. Серия cs.SI "Social and Information Networks ". 2025.
Community detection in complex networks is a fundamental problem, open to new approaches in various scientific settings. We introduce a novel community detection method, based on Ricci flow on graphs. Our technique iteratively updates edge weights (their metric lengths) according to their (combinatorial) Foster version of Ricci curvature computed from effective resistance distance between the ...
Added: January 15, 2026
Kuznetsov A., Moiseev E., Abramov A. et al., Small 2023 Vol. 19 No. 28 Article 2301660
Emerging technologies for integrated optical circuits demand novel approaches and materials. This includes a search for nanoscale waveguides that should satisfy criteria of high optical density, small cross-section, technological feasibility and structural perfection. All these criteria are met with self-assembled gallium phosphide (GaP) epitaxial nanowires. In this work, the effects of the nanowire geometry on ...
Added: May 22, 2023
Суворов Э. В., Золотов Д., Асадчиков В. et al., Автометрия 2019 № 2 С. 28–35
This paper is a continuation of previous studies on the development of X-ray topotomography
using laboratory equipment. The results on the spatial location of a single polygonal
dislocation half-loop in a silicon single crystal were obtained as a result of testing the sensitivity of
the X-ray topo-tomo diffractometer. A comparison was made with high-resolution experimental data
obtained at the ...
Added: November 21, 2019
Ingacheva A., Чукалина М. В., Прун В. Е. et al., В кн.: Сборник материалов Седьмого международного научного семинара и Пятой международной молодежной научной школы-семинара "Современные методы анализа дифракционных данных и актуальные проблемы рентгеновской оптики" 24-29 августа 2015 г. В. Новгород.: [б.и.], 2015. С. 244–246.
Artifacts caused by intensely absorbing areas are encountered in computed tomography (CT) and may obscure or simulate pathology in medical applications, hide or mimic the cracks and cavities in the devices at industrial applications. We simulated sinograms with different levels of absorption to demonstrate the artifacts dynamics. If the analysis of the measured data shows ...
Added: November 30, 2015
Черноголовка: Институт проблем технологии микроэлектроники и особочистых материалов РАН, 2010.
The texts of papers presented at the workshop on "X-Ray Optics - 2010" are published. Topics of the meeting included the following topics: X-ray crystal optics, multilayer optics for X-ray and extreme ultraviolet, X-ray technology of optical elements, the use of X-ray optics for the study of micro-and nanostructures, X-ray lithography, X-ray microscopy and imaging, ...
Added: March 28, 2013
Asadchikov V. E., Buzmakov A. V., Zolotov D. A. et al., Мир измерений 2012 № 6 С. 22–31
The article presents the results of experimental studies of microobjects, defects of crystal structure, as well as the quality of concave spherical surfaces, by topo-tomography. The principle of tomography is based on obtaining information about the spatial structure of an object by a set of its X-ray images at different angles of its location relative ...
Added: December 13, 2012
Геранин А. С., Volkov Y. O., Roshchin B. S. et al., Заводская лаборатория. Диагностика материалов 2010 Т. 76 № 4 С. 34–39
В статье рассмотрена связь совершенства кристаллов-монохроматоров с параметрами фокусируемого с их помощью рентгеновского пучка. Обоснована возможность практического применения кристаллов-монохроматоров из фторидов лития и кремния в задачах рентгеновской рефлектометрии. ...
Added: April 12, 2012