开头
发表于 2025-3-28 18:02:32
TIME DELAYS IN EPIDEMIC MODELSemic models with delay see van den Driessche . More generally, an arbitrarily distributed sojourn time in a state, for example, the infective or immune state, is used by some authors (see and the references therein).
内部
发表于 2025-3-28 21:43:25
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大门在汇总
发表于 2025-3-29 00:52:38
https://doi.org/10.1007/978-3-642-80490-8y Poincaré . The basic idea of normal form consists of employing successive, near-identity, nonlinear transformations, which leads us to a differential equation in a simpler form, qualitatively equivalent to the original system in the vicinity of a fixed equilibrium point, thus hopefully greatly simplifying the dynamical analysis.
largesse
发表于 2025-3-29 06:58:28
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AMOR
发表于 2025-3-29 08:25:39
https://doi.org/10.1007/978-3-642-80490-8quations combining diffusion and delayed reaction. This is the situation in the first example that we are going to present, which is a model proposed by A. Calsina and O. El Idrissi (), which joins spatial diffusion with demographic reaction.
probate
发表于 2025-3-29 12:03:22
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拍下盗公款
发表于 2025-3-29 17:37:01
, ca. 800.000 Menschen (Tutsi und moderate Hutu) verloren innerhalb weniger Wochen unmittelbar durch den Völkermord ihr Leben, bis Ende September hatten 2,1 Mio. rwandische Hutu im größten und am schnellsten vollzogenen Massenexodus der neueren Geschichte das Land verlassen (zumeist Richtung Zaire,
斗志
发表于 2025-3-29 20:19:54
Die Zukunft aktiv gestalten II978-3-86226-859-7Series ISSN 1430-905x