Results 71 to 80 of about 4,414,858 (168)

First-order and higher-order approximations of observation impact

open access: yesMeteorologische Zeitschrift, 2007
In studies by Errico (2007) and Gelaro et al. (2007), it was found that first order approximations of the reduction of forecast error by the analysis were systematically close to twice the correct value, while higher order approximations lead to ...
Yannick Trémolet
doaj   +1 more source

A Pure First Order Representation for Undamped Second Order Descriptor Systems [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2011
The aim of this paper is to analyze the undamped second order descriptor systems to show the possibility of transform an undamped second order descriptor system to a pure first order descriptor system ,on different ways, while stating some of its ...
A. Aasaraai
doaj  

First-order quojections

open access: yes, 1992
A quojection is a Fréchet space \(F\) which is the projective limit of a sequence of Banach spaces \(X_ n\) and surjective mappings \(R_ n: X_{n+1}\to X_ n\). A quojection is called twisted if it is not isomorphic to a product of Banach spaces. [For information about quojections see: the authors, Nato ASI Ser., Ser. C 287, 235-254 (1989; Zbl 0711.46008)
METAFUNE, Giorgio Gustavo Ermanno   +1 more
openaire   +3 more sources

On Strongly First-Order Dependencies [PDF]

open access: yes, 2016
We prove that the expressive power of first-order logic with team semantics plus contradictory negation does not rise beyond that of first-order logic (with respect to sentences), and that the totality atoms of arity k +1 are not definable in terms of the totality atoms of arity k.
openaire   +3 more sources

First-order planar autoregressive model

open access: yesModern Stochastics: Theory and Applications
This paper establishes the conditions for the existence of a stationary solution to the first-order autoregressive equation on a plane as well as properties of the stationary solution.
Sergiy Shklyar
doaj   +1 more source

Additive First-Order Queries.

open access: yes, 2019
A database query q is called additive if q(A U B) = q(A) U q(B) for domain-disjoint input databases A and B. Additivity allows the computation of the query result to be parallelised over the connected components of the input database. We define the "connected formulas" as a syntactic fragment of first-order logic, and show that a first-order query is ...
Gerald Berger   +4 more
openaire   +5 more sources

First-Order Semantics for Higher-Order Languages

open access: yesCrítica, 2018
Max Käsbauer
doaj   +1 more source

Development of FM screens

open access: yesJournal of Graphic Engineering and Design, 2012
What is a satisfactory quality when it comes to graphic arts industry? Acceptable quality of halftone image is becomesame as photographic picture. There are many different ways in which one can try to reach the desired quality.Different methods of ...
Ivan Pinćjer   +2 more
doaj  

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