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Краевые задачи для непрерывно-дискретных функционально-дифференциальных систем
Вестник Нижегородского университета им. Н.И. Лобачевского. 2013. № 1-3. С. 77–83.
Chadov A. L., Семенов А. В.
The dynamic models considered in this work, contain at the same time as the equations describing dynamics of indicators in continuous time on a final interval, and the equations with discrete time, characteristic for econometric models. For the specified class of systems statements of tasks as tasks about approachibility of preset values of indi-cators, in a form allowing effective research with use of modern computer technologies are given. Resolvability of the redefined of tasks in a case when approximate performance of boundary conditions is allowed is investigated.
Language:
Russian
Lola I. S., Asoskov D., [б.и.], 2026.
Центр конъюнктурных исследований Института статистических исследований и экономики знаний НИУ ВШЭ представляет информационный обзор, характеризующий деловые тенденции, сложившиеся в отрасли информационных технологий (ИТ-отрасль) в 2025 г.
Работа базируется на результатах ежегодного специализированного конъюнктурного мониторинга деловой и цифровой активности около 700 организаций, оказывающих информационно-технологические услуги (код по ОКВЭД 2 – 62, 63). Мониторинг проводился АНО ИИЦ «Статистика России» по заказу ...
Added: May 20, 2026
Lola I. S., Ostapkovich G. V., Asoskov D. et al., ИСИЭЗ НИУ ВШЭ, 2026.
Центр конъюнктурных исследований Института статистических исследований и экономики знаний Национального исследовательского университета «Высшая школа экономики» подготовил информационно-аналитический материал, характеризующий экономические настроения российских предпринимателей и потребителей в I кв. 2026 г. - «Индекс экономического настроения (ИЭН ВШЭ)». Информационная база мониторинга содержит накопленную за 1998-2026 гг. категориальную статистику «балансов мнений», базирующуюся на ответах респондентов. Такая «мягкая» качественная статистика ...
Added: May 20, 2026
Denis Seliutskii, Russian Journal of Mathematical Physics 2025 Vol. 32 No. 2 P. 399–407
In this paper, we find an upper bound for the first Steklov eigenvalue for a surface of revolution with boundary consisting of two spheres of different radii. Moreover, we prove that, in some cases, this boundary is sharp. ...
Added: May 19, 2026
Кумар В., MSW Management 2026 Vol. 36 No. 1s P. 1746–1753
This study explores how profitability, export efficiency, and cost functionality correlated with the financial sustainability index (FSI) for Indian manufacturing companies and the development of the early warning system. The study was conducted on 50 Indian manufacturing companies those participate in the export business, whose data has been collected for the nine quarters from 2023 ...
Added: May 19, 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
Tekic A., Nguen C. M., Business Horizons 2026 Article In Press, Journal Pre-proof
Fast-moving consumer goods (FMCG) firms face intense pressure to internationalize, yet the traditional playbook—lengthy R&D cycles, costly market research, and standardized campaigns—often struggles to deliver local relevance at speed. This article argues that crowdsourcing—digitally mediated, large-scale consumer participation—can complement established internationalization tools by mobilizing local knowledge and community endorsement to mitigate key aspects of the ...
Added: May 19, 2026
Ulanov V. L., Springer, 2026.
This work is subject to copyright. All rights are solely and exclusively licensed by the Publisher, whether the whole or part of the material is concerned, specifically the rights of translation, reprinting, reuse of illustrations, recitation, broadcasting, reproduction on microfilms or in any other physical way, and transmission or information storage and retrieval, electronic adaptation, ...
Added: May 19, 2026
Semerikova E. V., Салов А. И., The Journal of the New Economic Association 2026 Vol. 1 No. 70 P. 221–237
In this paper, we assess the extent of agglomeration externalities that
mirror on labour productivity gains while accounting for the direct and indirect effects
of transportation exposure. To this end we combine data on the local average wage and
employment with comprehensive information on the public transportation and road networks
of the Saint Petersburg Metropolitan Area, one of the ...
Added: May 19, 2026
Жакупов О. Б., European Journal of Mathematics 2025 Vol. 11 Article 84
We provide examples of smooth three-dimensional Fano complete intersections of degree 2, 4, 6, and 8 that have absolute coregularity 0. Considering the main theorem of Avilov, Loginov, and Przyjalkowski (CNTP 18:506–577, 2024) on the remaining 101 families of smooth Fano threefolds, our result implies that each family of smooth Fano threefolds has an element of absolute ...
Added: May 18, 2026
Voytenkov V., Emerging Markets Review 2026 No. 101482 P. 1–37
This paper examines the effects of the 2008, 2014, and 2020 crises on household consumption patterns in Russian regions. The micro-level analysis is conducted using quarterly data from Rosstat's Household Budget Survey. Dependent variables are expenditure on food at home, out-of-home, alcohol, non-food items, services. Explanatory variables are household characteristics and dummy variables that capture ...
Added: May 18, 2026
Lodiagin B., Nazarova V., Rincon C. J., URBAN, PLANNING AND TRANSPORT RESEARCH 2026 Vol. 14 No. 1
This study applies an established social cost–benefit analysis (CBA), combined with sequential shock scenarios (COVID-19 and the post-2022 sanctions) and Monte Carlo sensitivity analysis, to evaluate the welfare robustness and recovery dynamics of the Pulkovo Airport PPP renovation project (St. Petersburg, Russia). Using traffic, operations, and cargo forecasts through 2040, we compare a pre-shock baseline ...
Added: May 17, 2026
Brodetskiy G., Gerami V., Shidlovskii I. et al., Транспорт: наука, техника, управление 2026 № 3 С. 3–8
В статье предложен специальный метод модификации процедур многокритериальной оптимизации. Он позволяет расширить набор критериев выбора, чтобы учитывать предпочтения лица, принимающего решения (ЛПР) как раз в моделях транспортного обеспечения работы цепей поставок. Реализуется изменение наклона направляющей для линий уровня критерия выбора в пространстве значений частных критериев (с нацеливанием выбора на утопическую точку). Разработаны и представлены требуемые ...
Added: May 17, 2026
Федоров Н. С., Финансовый журнал 2025 Т. 17 № 6 С. 99–112
The DCF model is one of the most commonly used models in valuing companies for investment deci sions. Nevertheless, estimating the accuracy of this model remains an important research question. This article presents an assessment of the accuracy of DCF model specifications based on analyzing the variance of fair share prices of companies listed on ...
Added: May 15, 2026
Федоров Н. С., Финансы и бизнес 2025 Т. 21 № 3 С. 34–50
Currently, the role of artificial intelligence is increasingly playing a significant role in various fields, including the increasing role of machine learning in finance. On the other hand, company valuation remains an important part of research due to its difficulty in correctly predicting the accuracy of target stock prices. This study provides an analysis of ...
Added: May 15, 2026
Lerman L. M., Turaev D. V., Regular and Chaotic Dynamics 2026 Vol. 31 No. 3 P. 349–369
We show that bifurcations of four-dimensional symplectic diffeomorphisms with a quadratic homoclinic tangency to a saddle periodic orbit with real multipliers produce 2-elliptic periodic orbits if the tangency is not partially hyperbolic. We show that a normal form for the rescaled first-return maps near such tangency is given by a four-dimensional symplectic H´enonlike map and study bifurcations of the ...
Added: May 15, 2026
Aleskerov F. T., Yakuba V. I., Khutorskaya O. et al., Springer, 2026.
The book contains new models of bibliometric analysis based on centrality measures in network analysis, pattern analysis and stability analysis. A distinctive feature of these centrality measures is that they account for the parameters of vertices and group influence of vertices to a vertex. This reveals specific groups of publications, authors, terms, journals and affiliations ...
Added: May 15, 2026
Kuptsov P., Panyushev A., Stankevich N., Chaos 2026 Vol. 36 No. 5 Article 053138
We develop a machine-learning approach to reproduce the behavior of two versions of the van der Pol oscillator exhibiting a subcritical Andronov–Hopf bifurcation, with or without a codimension-2 Bautin point. We construct a neural-network model that functions as a recur rent map and train it on short segments of oscillator trajectories. The results show that, ...
Added: May 15, 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
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
Qin X., Deng Y., Shchur L. et al., / Series arXiv "math". 2026. No. 2603.02962.
We perform a Monte Carlo analysis of the Ising model on many three-dimensional lattices. By means of finite-size scaling we obtain the critical points and determine the scaling dimensions. As expected, the critical exponents agree with the three-dimensional Ising universality class for all models. The irrelevant field, as revealed by the correction-to-scaling amplitudes, appears to ...
Added: April 20, 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
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 ...
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