Results 21 to 30 of about 327,393 (318)
Perturbations of Superintegrable Systems [PDF]
, 2015 A superintegrable system has more integrals of motion than degrees d of freedom. The quasi-periodic motions then spin around tori of dimension n < d. Already under integrable perturbations almost all n-tori will break up; in the non-degenerate case the ...
Mathematical Modeling +3 more
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Incorporating Unmodeled Dynamics Into First-Principles Models Through Machine Learning
IEEE Access, 2021 First-principles modeling of dynamical systems is a cornerstone of science and engineering and has enabled rapid development and improvement of key technologies such as chemical reactors, electrical circuits, and communication networks.
Ward Quaghebeur +2 more
doaj +1 more source
The acquaintance time of (percolated) random geometric graphs [PDF]
, 2015 In this paper, we study the acquaintance time AC(G) defined for a connected graph G. We focus on G(n,r,p), a random subgraph of a random geometric graph in which n vertices are chosen uniformly at random and independently from [0,1]2, and two vertices ...
Mathematical Modeling +3 more
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Mathematics, 2022 For a nonlocal initial-boundary value problem for a one-dimensional heat equation with not strongly regular boundary conditions of general type, an approximate difference scheme with weights is constructed.
Makhmud A. Sadybekov +1 more
doaj +1 more source
Shrinking random β-transformation [PDF]
, 2017 For any n ≥ 3, let 1 < β < 2 be the largest positive real number satisfying the equation β n = β n−2 + β n−3 + · · · + β + 1. In this paper we define the shrinking random β-transformation K and investigate natural invariant measures for K, and the ...
Mathematical Modeling +3 more
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Vertical Transmission in a Two-Strain Model of Dengue Fever
Letters in Biomathematics, 2014 The role of vertical transmission in vectors has rarely been addressed in the study of dengue dynamics and control, in part because it was not considered a critical population-level factor.
David Murillo +4 more
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Mathematics, 2023 This article delves into the spectral problem associated with a multiple differentiation operator that features an integral perturbation of boundary conditions of one specific type, namely, regular but not strengthened regular.
Makhmud Sadybekov, Nurlan Imanbaev
doaj +1 more source
Simulation of thin film flows with a moving mesh mixed finite element method [PDF]
, 2018 We present an efficient mixed finite element method to solve the fourth-order thin film flow equations using moving mesh refinement. The moving mesh strategy is based on harmonic mappings developed by Li et al. (2001,2002). To achieve a high quality mesh,
Mathematical Modeling +3 more
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Random N-Continued Fraction Expansions [PDF]
, 2018 The N-continued fraction expansion is a generalization of the regular continued fraction expansion, where the digits 1 in the numerators are replaced by the natural number N. Each real number has uncountably many expansions of this form.
Mathematical Modeling +3 more
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Mathematical model of sarcoidosis [PDF]
Proceedings of the National Academy of Sciences, 2014 SignificanceSarcoidosis is a disease involving abnormal collection of granulomas that develop in the lung and other organs. The origin of the disease is unknown, clinical data are very limited, and there is no current effective treatment. This paper develops a mathematical model with simulations that are validated by the available clinical data.
Wenrui, Hao +2 more
openaire +2 more sources