Results 11 to 20 of about 1,090,342 (306)

Infinite series about harmonic numbers inspired by Ramanujan–like formulae

open access: yesElectronic Research Archive, 2023
By employing the coefficient extraction method from hypergeometric series, we shall establish numerous closed form evaluations for infinite series containing central binomial coefficients and harmonic numbers, including several conjectured ones made by Z.
Chunli Li, Wenchang Chu
doaj   +1 more source

Streamflow prediction using a hybrid methodology based on variational mode decomposition (VMD) and machine learning approaches

open access: yesApplied Water Science, 2023
The optimal management of water resources depends on accurate and reliable streamflow prediction. Therefore, researchers have become interested in the development of hybrid approaches in recent years to enhance the performance of modeling techniques for ...
Farshad Ahmadi   +2 more
doaj   +1 more source

Melanocytic lesions of the central nervous system: a case series [PDF]

open access: yesArquivos de Neuro-Psiquiatria, 2022
Background: Melanocytic lesions of the central nervous system (CNS) are an infrequent, broad and diverse group of entities, both benign and malignant, found in all age groups, with imaging findings ranging from well-circumscribed focal lesions to ...
Jorge VARELA-POBLETE   +4 more
doaj   +1 more source

Central Apnea in Patients with COVID-19 Infection

open access: yesJ, 2023
Background: The Coronavirus Disease 2019 (COVID-19) is a global pandemic that has killed over 1.5 million people worldwide. A constellation of multisystem involvement with SARS-CoV-2 has been reported.
Vikram Venkata Puram   +6 more
doaj   +1 more source

CA-discharge: Geo-Located Discharge Time Series for Mountainous Rivers in Central Asia

open access: yesScientific Data, 2023
We present a collection of 295 gauge locations in mountainous Central Asia with norm discharge as well as time series of river discharge from 135 of these locations collected from hydrological yearbooks in Central Asia.
Beatrice Marti   +6 more
doaj   +1 more source

Growth estimates for the maximal term and central exponent of the derivative of a Dirichlet series

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2020
Let $A\in(-\infty,+\infty]$, $\Phi:[a,A)\to\mathbb{R}$ be a continuous function such that $x\sigma-\Phi(\sigma)\to-\infty$ as $\sigma\uparrow A$ for every $x\in\mathbb{R}$, $\widetilde{\Phi}(x)=\max\{x\sigma -\Phi(\sigma):\sigma\in [a,A)\}$ be the Young ...
S.I. Fedynyak, P.V. Filevych
doaj   +1 more source

Patterns in the Multiannual Course of Growing Season in Central Europe Since the End of the 19th Century

open access: yesQuaestiones Geographicae, 2022
The research identified patterns in the multiannual course of start and end dates, and length of growing season (GS) in Central Europe since the end of the 19th century in selected cities of Central Europe in the period 1893–2020.
Szyga-Pluta Katarzyna   +3 more
doaj   +1 more source

Multiscaling NDVI Series Analysis of Rainfed Cereal in Central Spain

open access: yesRemote Sensing, 2021
Vegetation indices time series analysis is increasingly improved for characterizing agricultural land processes. However, this is challenging because of the multeity of factors affecting vegetation growth.
David Andrés Rivas-Tabares   +3 more
doaj   +1 more source

On Groups with Finite Hirsch Number [PDF]

open access: yesAdvances in Group Theory and Applications, 2020
Suppose G is a group with finite Hirsch number h modulo the k-th term of its upper central series. The Hirsch number of the (k + 1)-th term of the lower central series of G is known to be finite and of order bounded in terms of h and k.
B.A.F. Wehrfritz
doaj   +1 more source

Optimization of Central Pattern Generator based Quadruped Animation using Time Series with Genetic Algorithm

open access: yesSukkur IBA Journal of Computing and Mathematical Sciences, 2021
Generating believable quadruped motion is a challenging task for application like Games, Virtual Reality and Augmented Reality, where runtime user interaction is needed.
Zeeshan Bhatti   +2 more
doaj   +5 more sources

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