نتایج جستجو برای: tions

تعداد نتایج: 5446  

Journal: :Geo & Bio 2022

The article is dedicated to the memory of outstanding scientist-zoologist Vladyslav Ivanovich Monchenko. A brief outline main events scientist’s activity given. V. I. Monchenko’s scientific achievements include 191 works published during his lifetime (among them 8 monographs and textbooks), almost 50 newly described taxa copepod crustaceans their parasites, a unique collection Copepoda. Fundame...

Journal: :Journal of Biotechnology and Biodiversity 2021

In Central Brazil, plateaus, the most common geomorphologic form, have been undergoing intense conversion from native vegetation to pasture and agriculture in recent decades. We used carbon stable isotope ratios (δ13C) nitrogen (δ15N) assess possible changes soil organic matter dynamics under such land use modifications. This study aimed evaluate differences δ13C δ15N C N stocks between agricul...

2000
Glynda M. Moorer

main tains a range of struc tural units that sup port ac tivi ties and func tions which, col lec tively, sus tain an en v i ron ment which sup ports the in tel lec tual en ter prise that is Michi gan State Uni ver sity. Such ac tivi ties and func tions in c lude re search and out reach pro grams; cul tural events; health, coun sel ing, and rec rea tive serv ices; and pub li c in for ma tion. So...

2013
Ryan O'Donnell

We onsider a fundamental problem in omputational learning theory: learning an arbitrary Boolean fun tion that depends on an unknown set of k out of n Boolean variables. We give an algorithm for learning su h fun tions from uniform random examples that runs in time roughly (n k ) ! !+1 ; where ! < 2:376 is the matrix multipli ation exponent. We thus obtain the rst polynomial fa tor improvement o...

N. Rahimi Y. Ordokhani

Abstract. In this paper, we implement numerical solution of differential equations of frac- tional order based on hybrid functions consisting of block-pulse function and rationalized Haar functions. For this purpose, the properties of hybrid of rationalized Haar functions are presented. In addition, the operational matrix of the fractional integration is obtained and is utilized to convert compu...

Journal: :E3S web of conferences 2022

Higher throughput requirements of the radio access network (RAN) 5th generation (5G) lead in turn to even more higher capacity require-ments wireless backhaul segment. Current research proposes a model microwave link channel with adaptive modulation under fading condi-tions. This allows estimate maximum possible re-quired bit error probability (BEP) for un-der conditions. The contribution curre...

1999
ENRICO MARIA VITALE Aurelio Carboni Enrico Maria Vitale

We give an abstract characterization of categories which are localiza-tions of Maltsev varieties. These results can be applied to characterize localizations of naturally Maltsev varieties.

Journal: :IEEE Transactions on Power Delivery 2022

The classical electromagnetic time reversal (EMTR) fault location method in power systems requires multiple simula-tions the backward step, assuming different guessed loca-tions along line. This process can be consuming especially when a high accuracy is desired, as it may require significant number of locations. To cope with this issue, concept EMTR mismatched media has recently been introduce...

Journal: :Applied aspects of information technologies 2021

This work is dedicated to the study of various discrete approximation methods for continuous links, which obligatory step in digital control systems synthesis dynamic objects and guidelines development performing these opera tions using MATLAB programming system. The paper investigates such sampling as pulse-, step-, linearly invariant Z-transformations, substitution based on usage numerical in...

Journal: :Computers & Mathematics with Applications 2014
Benny Y. C. Hon Robert Schaback M. Zhong

1. Introdu tion. There are plenty of appli ation papers in whi h kernels or radial basis fun tions are su essfully used for solving partial di erential equations by meshless methods. The usage of kernels is typi ally based on spatial interpolation at s attered lo ations, writing the trial fun tions entirely in terms of nodes [2℄. For stationary partial di erential equations, the dis retization ...

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