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  1. www.sciencedirect.com › science › articleModified least squares estimators for Ornstein–Uhlenbeck...

    11 de may. de 2024 · The Ornstein–Uhlenbeck (OU) process X = { X t } t ≥ 0 is defined as the unique solution to the following stochastic differential equation (SDE) (1) d X t = − θ X t d t + σ d W t, X 0 = x, where θ > 0 is the drift parameter, σ > 0 is the diffusion parameter, and x ∈ R is the initial value.

  2. academic.oup.com › evolut › advance-article-abstractChallenges And Advances In Measuring Phenotypic Convergence

    21 de may. de 2024 · These methods include the commonly applied C 1– C 4 measures of Stayton (2015), which measure morphological distances between lineages, and Ornstein-Uhlenbeck (OU) model-fitting analyses, which test whether lineages converged on shared adaptive peaks.

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  4. www.oxfordreference.com › abstract › 10Uhlenbeck, George Eugene - Oxford Reference

    7 de may. de 2024 · "Uhlenbeck, George Eugene" published on by Oxford University Press. (1900–88)Dutch-born US physicist. We use cookies to enhance your experience on our website.

  5. www.cosmos-indirekt.de › Physik-Schule › Natrium-D-LinieNatrium-D-Linie – Physik-Schule

    2 de may. de 2024 · Die beobachtete Aufspaltung der Natrium-D-Linie sowie ähnlicher Linien anderer Alkalimetalle veranlasste Samuel Abraham Goudsmit und George Eugene Uhlenbeck im Jahre 1925, die Existenz des Elektronenspins zu postulieren.

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  7. arxiv.org › pdf › 2405VARIATIONAL INEQUALITIES THE HIGHER–DIMENSIONAL CASE - arXiv.org

    2 de may. de 2024 · We study the ρ-th order variation seminorm of a general Ornstein– Uhlenbeck semigroup (Ht) in Rn, t>0 taken with respect to t. We prove that this seminorm defines an operator of weak type (1, 1) with respect to the invariant measure when ρ > 2. For large t, one has an enhanced version of the standard weak-type (1, 1) bound.

  8. www.cosmos-indirekt.de › Physik-Schule › Samuel_Abraham_GoudsmitSamuel Abraham Goudsmit – Physik-Schule

    18 de may. de 2024 · Neben verschiedenen Arbeiten zur Atom- und Kernphysik postulierte er 1925 noch als Student in Leiden gemeinsam mit George Eugene Uhlenbeck die Existenz des Elektronenspins. 1927 promovierte er in Leiden und war ab 1927 Associate Professor und ab 1932 Professor an der University of Michigan.

  9. www.degruyter.com › database › PHYSIKOGeorge Eugene Uhlenbeck und Samuel Abraham Goudschmidt - De...

    10 de may. de 2024 · Should you have institutional access? Here's how to get it ... Search Physik Online. Browse