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Fair insurance premium level in connected SIR model under epidemic outbreak
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
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
Petrovanov I., Sergeev A., / Series Computer Science "arxiv.org". 2025. No. 2512.18332.
Transport coding reduces message delay in packet-switched networks by introducing controlled redundancy at the transport layer: original packets are encoded into coded packets, and the message is reconstructed after the first successful deliveries, effectively shifting latency from the maximum packet delay to the -th order statistic. We present a concise, reproducible discrete-event implementation of transport coding in OMNeT++, including ...
Added: December 24, 2025
Hessian-based lightweight neural network for brain vessel segmentation on a minimal training dataset
Меньшиков И. А., Бернадотт А. К., Elvimov N. S., / Series arXie "Statistical mechanics". 2025.
Accurate segmentation of blood vessels in brain magnetic resonance angiography (MRA) is essential for successful surgical procedures, such as aneurysm repair or bypass surgery. Currently, annotation is primarily performed through manual segmentation or classical methods, such as the Frangi filter, which often lack sufficient accuracy. Neural networks have emerged as powerful tools for medical image ...
Added: December 1, 2025
Rubchinskiy A., Chubarova D., / Series WP7 "Математические методы анализа решений в экономике, бизнесе и политике". 2025. No. WP7/2025/01.
The article examines one of the most famous examples of socio-economic systems, characterized by significant uncertainty – the S&P-500 stock market, where shares of 500 largest US companies are traded. No assumptions are made about the probabilistic characteristics of the stock market. A flexible algorithm for daily trading has been developed, based on both known fixed data ...
Added: November 9, 2025
Akaev A., Zvyagintsev A., Sarygulov A. et al., Mathematics 2022 Vol. 10 No. 19 Article 3654
The outburst of the COVID-19 pandemic and its rapid spread throughout the world in
2020 shed a new light on mathematic models describing the nature of epidemics. However, as
the pandemic shocked economies to a much greater extent than earlier epidemics, the recovery
potential of economies was emphasized and its inclusion in epidemic models is becoming more
important. The ...
Added: October 29, 2024
Pochekaev R. Y., В кн.: На изломе истории: эпидемии и катастрофы в странах Востока: Коллективная монография.: М.: Институт востоковедения РАН, 2023. Гл. 8 С. 226–235.
В главе анализируются меры по борьбе с эпидемией холеры в Оренбургском крае в 1829-1830 гг. и о начальном этапе исследования заразных болезней в сопредельных ханствах Средней Азии. ...
Added: December 27, 2023
М.: Институт востоковедения РАН, 2023.
Влияние катастроф и эпидемий на жизнь государства и общества, как правило, сопряженно с многочисленными потрясениями. Коллективная монография дает возможность взглянуть на происходившие в прошлом события как с политической и экономической точки зрения, так и с позиции влияния эпидемий, среди которых чума занимает особое место, а также катастроф (наводнений, землетрясений, цунами) на исторические этапы развития стран ...
Added: December 27, 2023
Chesnokova N., В кн.: Эпидемии, уединение, дистанцирование: многовековой путь Востока.: М.: Издательский дом НИУ ВШЭ, 2023. Гл. 2 С. 52–79.
Глава в коллективной монографии, посвященная распространению эпидемий в корейском королевстве Чосон и борьбе с ними. ...
Added: November 9, 2023
Zeltyn A., Zeltyn L., В кн.: Эпидемии, уединение, дистанцирование: многовековой путь Востока.: М.: Издательский дом НИУ ВШЭ, 2023. С. 270–286.
Epidemics, diseases and outbreaks of mass pestilence are one of the most common themes that are reflected in the books of Arabic-speaking authors. Description of the dramatic events experienced by the inhabitants of the Arabic-speaking world and described by some of them is a valuable source of information not only on the history of the ...
Added: October 31, 2023
Grafova M. A., Российская история 2022 № 2 С. 166–179
Studies of epidemics and related fears and neuroticisms are especially relevant nowadays. Our research topic is an interesting aspect of early Soviet healthcare which has not been extensively studied: Sanitary propaganda on the subject of Sexually Transmitted Disease (STD) which was widespread in the 1920s after the First World War, the Revolution and the Civil ...
Added: May 24, 2022
Steiner E. S., Обсерватория культуры 2021 Т. 18 № 6 С. 596–611
The article discusses the mechanisms of protection against infectious diseases that have been employed in Japan through ages, and the religious, social, and individual practices considered effective in the struggle with epidemics. Studying the cultural and ethnoreligious roots of Japanese attitude towards epidemics is particularly relevant these days. The coronavirus pandemic has reanimated the memory of old popular beliefs and actualized traditional, even ...
Added: December 9, 2021
Veld N., , in: Recent Trends in Analysis of Images, Social Networks and Texts. 9th International Conference, AIST 2020, Skolkovo, Moscow, Russia, October 15–16, 2020 Revised Supplementary ProceedingsVol. 12602.: Springer, 2021. P. 303–306.
During COVID-19 outbreak more interest in forecasting models has appeared. However, one of the popular sources of selecting the best models relies on specific leaderboards. The leaderboard maintainers utilize their own test configurations but it is unhelpful when they are trying to fit a model to not listed configuration or a model cannot be shown ...
Added: July 11, 2021
Бергер Е. Е., Uvarov P. Y., В кн.: Казнь Господня. Эпидемии в Европе XIV-XVI вв. Сборник документов.: М.: Институт всеобщей истории РАН, 2020. Гл. 1 С. 7–23.
В намеренном распространении чумы обвиняли некоторые категории населения. Подозрение падало,
например, на прокаженных, чья болезнь, как считали современники, ввергала их в состояние злобы и безумия.
Вину за распространение эпидемии общественное мнение зачастую возлагало на евреев, чьи гигиенические правила (бани и обливания) давали им некоторую защиту от заражения. Поэтому «Черная смерть» повлекла за собой вспышку антисемитизма: евреев обвиняли в злонамеренном отравлении колодцев с целью вызвать ...
Added: March 8, 2021
Petrova T., Soshnikov D. V., Grunin A., / Series 2310-287X "Preprints.org". 2020.
Real-time estimation of the parameters characterising infectious disease transmission is important for optimization quarantine interventions during outbreaks. One of the most significant parameters is the effective reproduction number - number of secondary cases produced by a single infection. The current study presents an approach for estimating the effective reproduction number and its application to COVID-19 outbreak. The method is based on fitting SIR epidemic ...
Added: November 20, 2020
Novikova A., В кн.: Искусство в контексте пандемии: медиатизация и дискурс катастрофизма.: М.: Издательские решения , 2020. Гл. 19 С. 456–475.
Статья посвящена анализу публичной дискуссии о различных стратегиях адаптации музеев к вызовам цифровой культуры, их готовности к корректировке приоритетов и конвергенции с медиа. Сложные условия, в которых оказались творческие индустрии всего мира в период карантина, стали для музеев испытанием, поставившим под сомнения целесообразность дальнейшей их ориентации на глобальный туризм и привычные форматы работы музеев с ...
Added: November 2, 2020
Chernov A., Kelbert M., Shemendyuk A., Mathematical Medicine and Biology 2020 Vol. 37 No. 3 P. 303–312
The aim of this work is to investigate the optimal vaccine sharing between two SIR centres in the presence of migration fluxes of susceptibles and infected individuals during the mumps outbreak. Optimality of the vaccine allocation means the minimisation of the total number of lost working days during the whole period of epidemic outbreak $[0,t_f]$, ...
Added: May 3, 2019
Scherbak A. N., Сенников Е. В., Лисовский Т. А., В кн.: Публичная политика - 2014. Сборник статей.: СПб.: НОРМА, 2015. С. 59–70.
Теория демократии и смена режимов по праву занимают одно из центральных мест в политической науке. Исследователи выдвинули немало предположений, объясняющих переход к демократии и устойчивость в обществе этой формы правления. Среди факторов, определяющих переход к демократии, наиболее популярны экономика, культура, историческое наследие, раскол элит. Все вышеперечисленное можно обозначить как социальные факторы. Мы в данной статье ...
Added: December 25, 2015