Skocz do pozycji: 1.

Tytuł:

A univalence criterion for meromorphic functions

Autorzy:

Miazga, J.
Wesołowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/1312357.pdf

Data publikacji:

1991

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

Löwner chain
Schwarz derivative

Opis:

A sufficient univalence condition for meromorphic functions is given

Źródło:

Annales Polonici Mathematici; 1991-1992, 56, 1; 63-66
0066-2216

Pojawia się w:

Annales Polonici Mathematici

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

Electrical impedance tomography: from topology to shape

Autorzy:

Hintermuller, M.
Laurain, A.

Powiązania:

https://bibliotekanauki.pl/articles/970303.pdf

Data publikacji:

2008

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

electrical impedance tomography
inverse problem
shape derivative
topological derivative
level set method

Opis:

A level set based shape and topology optimization approach to electrical impedance tomography (EIT) problems with piecewise constant conductivities is introduced. The proposed solution algorithm is initialized by using topological sensitivity analysis. Then it relies on the notion of shape derivatives to update the shape of the domains where conductivity takes different values.

Źródło:

Control and Cybernetics; 2008, 37, 4; 913-933
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

Topological derivative for optimal control problems

Autorzy:

Sokołowski, J.
Żochowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/206790.pdf

Data publikacji:

1999

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

sterowanie optymalne
asymptotic expansion
control problems
shape derivative
shape optimization
topological derivative

Opis:

The topological derivative is introduced for the extremal values of cost functionals for control problems. The optimal control problem considered in the paper is defined for the elliptic equation which models the deflection of an elastic membrane. The derivative measures the sensitivity of the optimal value of the cost with respect to changes in topology. A change in topology means removing a small ball from the interior of the domain of integration. The topological derivative can be used for obtaining the numerical solutions of the shape optimization problems.

Źródło:

Control and Cybernetics; 1999, 28, 3; 611-625
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Analysing experimental research data with the help of numerical derivative

Autorzy:

Książkiewicz, A.

Powiązania:

https://bibliotekanauki.pl/articles/97475.pdf

Data publikacji:

2013

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

numerical methods
derivative
electrical contacts

Opis:

A lot of research data is generated during carrying out experiments like for example in case of oscilloscope records. In this huge amount of information a lot of it is irrelevant. Therefore finding the useful information can be difficult. The influence of closing a short- circuit current with an electromagnetic relay on its contacts was tested. During those tests a large amount of data, recorded by oscilloscope, was created. Only a small portion of this information was useful. The problem was to find specific information in all of the gathered data. This article presents the usage of scientific software designed to solve this issue. It also describes the usage of numerical derivate for finding a specific time range of collected waveforms.

Źródło:

Computer Applications in Electrical Engineering; 2013, 11; 304-309
1508-4248

Pojawia się w:

Computer Applications in Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Analytical Solution to Linear Conformable Fractional Partial Differential Equations

Autorzy:

Dixit, Ajay
Ujlayan, Amit

Powiązania:

https://bibliotekanauki.pl/articles/1159232.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Conformable fractional derivative
Fractional partial differential equation
Katugampola’s derivative
Method of separation of variables

Opis:

An analytical solution is better than an approximate or series solution of a problem. Here we develop an analytical formulation to solve linear fractional order partial differential equations with given boundary conditions. We discuss the method for the simultaneous fractional derivative, in space as well as time and up to order two. Examples reflect the effectiveness and simplicity of the method. First we convert the fractional derivative into integer order derivative and then use method of separation of variables in usual sense to get the complete solution. The fractional derivative has been taken in the sense of Katugampola’s derivative.

Źródło:

World Scientific News; 2018, 113; 49-56
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

Determination of kinetic parameters of decomposition of tetrahydropyrimidine derivatives

Autorzy:

Bhesaniya, K.
Patel, A.
Baluja, S.

Powiązania:

https://bibliotekanauki.pl/articles/411745.pdf

Data publikacji:

2013

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

tetrahydropyrimidine derivative
TGA
DSC
kinetic parameter

Opis:

Some new tetrahydropyrimidine derivatives have been synthesized and their structural determination was done by IR, NMR and mass spectral data. Thermal analysis of these synthesized dihydropyrimidinthiones has been carried out by TGA and DSC techniques. From the thermograms, various kinetic parameters such as order of degradation (n), energy of activation (E), frequency factor (A) and entropy change (ΔS) have been evaluated. Further, thermal stability of tetrahydropyrimidine have been determined which is found to depend on the type of substituent present in the compounds.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2013, 13; 23-32
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

On shape sensitivity analysis of the cost functional without shape sensitivity of the state variable

Autorzy:

Kasumba, H.
Kunisch, K.

Powiązania:

https://bibliotekanauki.pl/articles/206115.pdf

Data publikacji:

2011

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

shape derivative
Navier-Stokes equations
cost functional

Opis:

A general framework for calculating shape derivatives for domain optimization problems with partial differential equations as constraints is presented. The first order approximation of the cost with respect to the geometry perturbation is arranged in an efficient manner that allows the computation of the shape derivative of the cost without the necessity to involve the shape derivative of the state variable. In doing so, the state variable is only required to be Lipschitz continuous with respect to geometry perturbations. Application to shape optimization with the Navier-Stokes equations as PDE constraint is given.

Źródło:

Control and Cybernetics; 2011, 40, 4; 989-1017
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

МОРФОНОЛОГИЧЕСКИЕ МОДЕЛИ НОМИНАТИВНОЙ ДЕРИВАЦИИ (К ПРОБЛЕМЕ ФУНКЦИЙ ДЕРИВАЦИОННОЙ МОРФОНОЛОГИИ РУССКОГО ЯЗЫКА)
Morphonological Models of the Nominative Derivation (the Functional Aspect of Derivative Morphonology of the Russian Language)

Autorzy:

Antipov, Aleksandr

Powiązania:

https://bibliotekanauki.pl/articles/444736.pdf

Data publikacji:

2008-12-01

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

derivative morphonology
semiotic functions
categorization
Russian dialects

Opis:

The article is devoted to study the semiotic aspect of the Russian derivative morphonology. The dynamics and perspectives of this functional aspect are shown in connection with the nomina- tive categorization on the example of the Russian dialectal morphonology.

Źródło:

Acta Neophilologica; 2008, X; 21-30
1509-1619

Pojawia się w:

Acta Neophilologica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Classical solutions of hyperbolic partial differential equations with implicit mixed derivative

Autorzy:

Marano, Salvatore

Powiązania:

https://bibliotekanauki.pl/articles/1312194.pdf

Data publikacji:

1992

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

hyperbolic equation
implicit mixed derivative
classical solution

Opis:

Let f be a continuous function from $[0,a] × [0,β] × (ℝ^n)⁴$ into $ℝ^n$. Given $u₀,v₀ ∈ C⁰([0,β],ℝ^n)$, with f(0, x, ∫_0^x u₀(s)ds, ∫_0^x v₀(s)ds, u₀(x), v₀(x)) = v₀(x) for every x ∈ [0,β], consider the problem (P) { ∂²z/(∂t∂x) = f(t, x, z, ∂z/∂t, ∂z/∂x, ∂²z/(∂t∂x)),
$z(t,0) = ϑ_{ℝ^n}$, $z(0,x)=∫_0^x u₀(s)ds$, ∂²z(0,x)/(∂t∂x) = v₀(x). In this paper we prove that, under suitable assumptions, problem (P) has at least one classical solution that is local in the first variable and global in the other. As a consequence, we obtain a generalization of a result by P. Hartman and A. Wintner ([4], Theorem 1).

Źródło:

Annales Polonici Mathematici; 1991-1992, 56, 2; 163-178
0066-2216

Pojawia się w:

Annales Polonici Mathematici

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

On \(\mathbb{I}\)-approximate limits and \(\mathbb{I}\)-approximate smoothness

Autorzy:

Zduńczyk, Rafał

Powiązania:

https://bibliotekanauki.pl/articles/746328.pdf

Data publikacji:

2006

Wydawca:

Polskie Towarzystwo Matematyczne

Tematy:

Density point
algebra of sets
generalized derivative

Opis:

In this paper we present some results based on slightly modified idea of the \(\mathbb{I}\)-density introduced by Władysław Wilczyński. Some theorems are generalized versions of results from [2] and [3]. We investigate properties of functions from \(\mathbb{R}^X\), where \(X\) is supplied with the \(\mathbb{I}\)-density. We try to free our considerations from the assumption of Baire property, or measurability. In some cases this is not done yet. Star-marked statements still need that assumption, proofs presented here are done for Baire property, but it is possible to adapt them to measure. \(\mathbb{I}\)-density itself does not require any structure of considered space but a metric vector space over \(\mathbb{R}\). However, in last section we confine ourselves to \(\mathbb{R}\), for we make use of \(\mathbb{R}\)’s structure for simplicity. To find more about related topics see [4], [5], more bibliography one can find in [1] and [5].

Źródło:

Commentationes Mathematicae; 2006, 46, 1
0373-8299

Pojawia się w:

Commentationes Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Point derivations for Lipschitz functions andClarkes generalized derivative

Autorzy:

Demyanov, Vladimir
Pallaschke, Diethard

Powiązania:

https://bibliotekanauki.pl/articles/1339173.pdf

Data publikacji:

1997

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

point derivations
generalized directional derivative
Lipschitz functions

Opis:

Clarke's generalized derivative $f^0(x,v)$ is studied as a function on the Banach algebra Lip(X,d) of bounded Lipschitz functions f defined on an open subset X of a normed vector space E. For fixed $x\in X$ and fixed $v\in E$ the function $f^0(x,v)$ is continuous and sublinear in $f\in Lip(X,d)$. It is shown that all linear functionals in the support set of this continuous sublinear function satisfy Leibniz's product rule and are thus point derivations. A characterization of the support set in terms of point derivations is given.

Źródło:

Applicationes Mathematicae; 1996-1997, 24, 4; 465-474
1233-7234

Pojawia się w:

Applicationes Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Лексика песенных зачинов в белорусской свадьбе: семантика, структурные трансформации (на примере одной группы текстов)

Autorzy:

Кутырёва-Чубаля [Kutyriowa-Czubala], Галина [Galina]

Powiązania:

https://bibliotekanauki.pl/articles/676529.pdf

Data publikacji:

2016

Wydawca:

Polska Akademia Nauk. Instytut Slawistyki PAN

Tematy:

incipit
semantics
transformations
affixation
derivative
dynamic typology

Opis:

Lexical Forms of Song’s Incipits in Belarusian Wedding Cycle: Semantics, Structural Transformations (an Example of One Type of Texts) In the context of the study on dynamic typology and dialectal features of Belarusian folk songs, the paradigm of texts relating to the episode when the Bride parts with her parents is considered here. Such texts have the same lexical and poetic basis; are characterized by common type of incipit in different variants. All of these texts depict an dramatic for the Bride moment of “intrusion” into her backyard “an alien” family – the Groom’s family. Different versions of this incipit have been noticed within the large territory of Belarus and on the frontier (Latvia, Poland). Structural transformations of this type of incipits are manifested by reduction or, quite the opposite, by adding (affixation) syllables in verses. It is conditioned by non-verbal semantics expressed through vocalic rhythmic – the superiority of recitation elements or motor and somatic dynamics. Expansion of an incipit verses by adding to the initial word its rhymed synonym is also a typical phenomena.Diachrony of a given paradigm texts is also revealed by comparing the texts related thematically to the wedding moment mentioned above. A large number of these texts are abridged versions (a middle and a final part) of full texts of paradigm in question. A song in the abbreviated version begins with the culminative part and omits the metaphorical and descriptive initial part (such transformations can be observed in the periphery districts of a radical area). Accordingly, in such a case a different stanza fulfills the incipit function. The method of dynamic typology is applied while analyzing various texts that belong strictly to the same syllabic and rhythmic paradigm. It is a promising approach to study on linguo-musical dialects and diachronic changes in folk song language. Leksyka incipitów białoruskich pieśni weselnych: semantyka, transformacje strukturalne (na przykładzie jednej grupy tekstów)W kontekście badań typologii dynamicznej oraz cech dialektalnych białoruskiej pieśni ludowej rozpatrujemy paradygmat tekstów dotyczących epizodu rozstawania się panny młodej z rodzicami. Są to teksty o tym samym podłożu leksykalno-poetyckim, które charakteryzuje wspólny typ incipitu w różnych jego wariantach. Wszystkie one symbolizują dramatyczny dla panny młodej moment „wtargnięcia” na jej podwórko „obcego” rodu – rodu narzeczonego. Metafora ta zawarta jest w formule incipitu. Warianty formuły zanotowano na znacznym obszarze Białorusi oraz na terenach przygranicznych (Łotwa, Polska). Transformacje strukturalne tego typu incipitów polegają na redukcji lub rozrastaniu (afiksacji) składu sylabowego wersolinii. Wszystko to jest uwarunkowane semantyką pozawerbalną, wyrażoną przez rytmikę wokaliczną – z przewagą albo elementów deklamacyjności, albo dynamiki motoryczno-somatycznej. Charakterystyczne jest również poszerzenie wersu incipitu za pomocą dodawania do początkowego wyrazu synonimu rymowanego.Diachronia tekstów danego paradygmatu ujawnia się także przy zestawieniu tekstów tematycznie związanych z tymże epizodem wesela. Spora liczba tych tekstów przedstawia wersję skróconą – środkowy i końcowy fragmenty – tekstu pierwotnego danej grupy. Pieśń w wersji skróconej rozpoczyna się od punktu kulminacyjnego, z pominięciem metaforyczno-narracyjnej części wstępnej. Odpowiednio rolę incipitu pełni tu inna strofa. Teksty w wersji skróconej lokalizują się na peryferiach areału. Metodę dynamicznej typologii pieśni stosujemy do opisu tekstów różnych gatunków, o różnej tematyce, jednak należących ściśle do tego samego paradygmatu sylabo-rytmicznego. Otwiera to nowe perspektywy w badaniach dialektów lingwo-muzycznych oraz zmian diachronicznych w języku pieśni ludowej.

Źródło:

Acta Baltico-Slavica; 2016, 40
2392-2389
0065-1044

Pojawia się w:

Acta Baltico-Slavica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

On a partial Hadamard fractional integral inclusion

Autorzy:

Cernea, Aurelian

Powiązania:

https://bibliotekanauki.pl/articles/729602.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

Hadamard fractional derivative
integral inclusion
decomposable set

Opis:

We study a class of nonconvex Hadamard fractional integral inclusions and we establish some Filippov type existence results.

Źródło:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2016, 36, 2; 141-153
1509-9407

Pojawia się w:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Experimental evaluation of forward speed effect on maneuvering hydrodynamic derivatives of a planing hull

Autorzy:

Kazerooni, M. F.
Seif, M. S.

Powiązania:

https://bibliotekanauki.pl/articles/135366.pdf

Data publikacji:

2017

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

planing hull
maneuvering
model test
derivative
hydrodynamic

Opis:

The calculation of unknown hydrodynamic derivatives of the equations of motion is the first step to estimate ship maneuverability and dynamic stability. These derivatives can be obtained theoretically, experimentally and numerically. Despite the development of the oblique towing model test to measure the hydrodynamic derivatives of displacement ships, limited experimental results are available for hydrodynamic derivatives of high speed crafts and speed dependency of the hydrodynamic derivatives is not understood well. In this paper a systematic series of model tests is described to determine the effect of forward speed on hydrodynamic derivatives of a monohull planing craft and the variations of the hydrodynamic derivatives by forward speed are derived. According to the results, hydrodynamic derivatives of planing hull are dramatically changed by variations of forward speed. Moreover, it is not possible to introduce a constant hydrodynamic derivative in the all the ranges of drift angle. Thus, the method of known constant hydrodynamic derivatives is not applicable to the simulation of planing craft maneuvering and variable hydrodynamic derivatives should be applied.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2017, 49 (121); 40-53
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Faza rekonstrukcyjna derywacyjnej koncepcji wykładni - próba krytycznej analizy

Autorzy:

Mularski, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/1788236.pdf

Data publikacji:

2017-05-14

Wydawca:

Polska Akademia Nauk. Instytut Nauk Prawnych PAN

Tematy:

derywacyjna koncepcja wykładni
derivative concept of interpretation

Opis:

The subject matter of the paper is the reconstructive phase of the derivative conception of interpretation. In this phase, the task of the interpreter is to recreate (reconstruct) from provisions of law a normative expression which later becomes the subject of further interpretation aimed at obtaining (or recognising, reconstructing) norm established by the legislator. Conducting the reconstructive phase allows you to move on to the next, perceptual phase of interpretation, grouping different types of interpretation directives. The paper presents doubts raised by the derivative conception in the chosen scope and attempts to indicate its possible modifications. Especially the theses on the "transition" procedure (paraphrase, semantic derivation) from provisions of law to the normative expression are considered controversial. The proposed modifications concern primarily a thesis of the need to make a set of legal provisions relevant prima facie for determining legal consequences of a given class of events the subject matter of interpretation carried out according to the principles of the perceptual phase.

Źródło:

Studia Prawnicze; 2017, 3 (211); 7-46
0039-3312
2719-4302

Pojawia się w:

Studia Prawnicze

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Contemporary trends in development of active substances possessing the pesticidal properties: neonicotinoid insecticides

Autorzy:

Legocki, J.
Polec, I.

Powiązania:

https://bibliotekanauki.pl/articles/55158.pdf

Data publikacji:

2008

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

insecticide
nicotinoid insecticide
nicotine
nitroguanidine derivative
pesticidal property
2-nitroethane derivative
nicotinic acetylcholine receptor
neonicotinoid insecticide
agonistic activity

Opis:

A new group of insecticides, widely introduced to the agriculture practice since the 90-ies of XX century - neonicotinoides, is discussed. The history of its arise, and insecticidal properties, mode of action, and short characteristics of some of its representatives is presented.

Źródło:

Pestycydy; 2008, 1-2; 143-159
0208-8703

Pojawia się w:

Pestycydy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

On derivo-periodic multifunctions

Autorzy:

Jüttner, Libor

Powiązania:

https://bibliotekanauki.pl/articles/729346.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

differential of multivalued functions
multivalued differential
contingent derivative
linearity of contingent derivative
periodic multivalued functions
derivo-periodic multivalued functions

Opis:

The problem of linearity of a multivalued derivative and consequently the problem of necessary and sufficient conditions for derivo-periodic multifunctions are investigated. The notion of a derivative of multivalued functions is understood in various ways. Advantages and disadvantages of these approaches are discussed.

Źródło:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2001, 21, 1; 81-95
1509-9407

Pojawia się w:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Necessary optimality conditions for quasi-singular controls for systems with Caputo fractional derivatives

Autorzy:

Yusubov, Shakir Sh.
Mahmudov, Elimhan N.

Powiązania:

https://bibliotekanauki.pl/articles/27321480.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

fractional derivative
fractional optimal control
necessary optimality condition

Opis:

In this paper, we consider an optimal control problem in which a dynamical system is controlled by a nonlinear Caputo fractional state equation. First we get the linearized maximum principle. Further, the concept of a quasi-singular control is introduced and, on this basis, an analogue of the Legendre-Clebsch conditions is obtained. When the analogue of Legendre-Clebsch condition degenerates, a necessary high-order optimality condition is derived. An illustrative example is considered.

Źródło:

Archives of Control Sciences; 2023, 33, 3; 463--496
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Словотвірні варианты мужских личных собственных имен Луцкой замковой книги 1560-1561 гг.
Word‑formative Variants of Male Personal Proper Nouns in the Lutsk Castle Book of 1560‑1561

Autorzy:

Ящук, Леся
Литвинчук, Оксана

Powiązania:

https://bibliotekanauki.pl/articles/16506419.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

name
word‑formative variant
formant
derivative
heritage site

Opis:

The article is devoted to an analysis of the suffixal and truncated suffixal variants of male Christian names in the Lutsk castle book of 1560‑1561(2013), and the identification of productive / unproductive formants in the composition of the researched names. The Polish academic I. Mytnik prepared a monograph Anthroponymy of Volynia of the 16th‑18th centuries (2010), using a wide source base – 58 manuscripts and 32 printed sources, but this 16th‑century Volyn literary heritage site did not serve as a basis for her study. Having studied the word‑formative derivatives of the male Christian names in the Lutsk castle book of 1560‑1561 we came to the conclusion that the most productive formants are ‑k(o) (67 variants) and ‑ets (40 variants); the suffixes ‑yna (10), ‑uk (9), ‑ash (6), ‑osh (4) show a slightly lower productivity. With the help of the suffixes ‑k(a), ‑yk, ‑ysh, ‑ut(a), ‑yts(a) 2 nominal variants are formed. Names with the formants ‑ok, ‑as, ‑ys, ‑os, ‑ay constitute single examples. The most commonly used names in Volyn documents from the middle of the 16th century were Yatsko / Ya(ts)ko (35 bearers), Fede(ts) / Khvede(ts) (22), Vasko / Va(s)ko (20), Hrytsko / Hry(ts)ko, Yvane(ts) (18), Le(v)ko (15), Andree(ts) / Andrѣe(ts) (14), Yvashko / Yva(sh)ko, Matys (11), Mykhno, Tyshko / Ty(sh)ko, Fe(d)ko / Khve(d)ko (10). Among the truncated suffix name variants, the most productive form is ‑khno: it being attested in 9 names. While the most commonly used name is Mykhno (10 bearers).

Źródło:

Slavia Orientalis; 2022, LXXI, 1; 193-206
0037-6744

Pojawia się w:

Slavia Orientalis

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Die polnische Wortbildungsterminologie im Vergleich mit der deutschen

Autorzy:

Stopyra, Janusz

Powiązania:

https://bibliotekanauki.pl/articles/504780.pdf

Data publikacji:

2012

Wydawca:

Komisja Nauk Filologicznych Polskiej Akademii Nauk, Oddział we Wrocławiu

Tematy:

predicate-argument structure
derivative
compound
suffix
descriptive models

Opis:

The article discusses the model classifying German motivated words that takes its origin in the work of Fillmore entitled "The Case for Case" (1968) and is used by Hans Wellmann in his description of German word formation processes in 1984-1998 (Duden. Die Grammatik, Band 4). The model stands in agreement with the rule of assigning the semantic roles to individual parts of the sentence, which was formulated in German language by Wolfgang Motsch (2004). Renata Grzegorczykowa and Jadwiga Puzynina used the same rule in Polish word formation in their „Gramatyka współczesnego języka polskiego. Morfologia.” (1999). Each time, the model classifies the derivative words with reference to their semantic role and the motivating part of the explicatory paraphrase. Such derivatives may be, at the same time, classified according to their suiffxes. In the case of compounds and case government structures that are motivated by the functioning in the particular language verbal phrase, the motivational aspect comes from the particular verbal phrase (used as an explicating paraphrase) – its motivational argument and reference argument. The latter one belongs to the verb case government present in the explicating phrase and is added to the compound on its left side. The model described in the article is also used in order to describe the Danish derivatives which appear as equivalents of German words in the literary translations.

Źródło:

Academic Journal of Modern Philology; 2012, 1; 119-127
2299-7164
2353-3218

Pojawia się w:

Academic Journal of Modern Philology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Shape derivatives for general objective functions and the incompressible Navier-Stokes equations

Autorzy:

Schmidt, S.
Schulz, V.

Powiązania:

https://bibliotekanauki.pl/articles/969869.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

shape optimization
shape derivative
Navier-Stokes
adjoint calculus

Opis:

The aim of this paper is to present the shape derivative for a wide array of objective functions using the incompressible Navier-Stokes equations as a state constraint. Most real world applications of computational fluid dynamics are shape optimization problems in nature, yet special shape optimization techniques are seldom used outside the field of elliptic partial differential equations and linear elasticity. This article tries to be self contained, also presenting many useful results from the literature. We conclude with a comparison of different objective functions for the shape optimization of an obstacle in a channel, which can be done quite conveniently when one knows the general form of the shape gradient.

Źródło:

Control and Cybernetics; 2010, 39, 3; 677-713
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Shape differentiability of the Neumann problem of the Laplace equation in the half-space

Autorzy:

Amrouche, C.
Necasova, S.
Sokołowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/970287.pdf

Data publikacji:

2008

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

shape optimization
Neumann problem
unbounded domain
material derivative

Opis:

We deal with the existence of the material derivative of the Laplace equation with the Neumann boundary condition in the half space. We consider two different perturbations of domains to get the existence of weak Gateaux material derivative and the existence of Fréchet material derivatives.

Źródło:

Control and Cybernetics; 2008, 37, 4; 747-769
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Exciter fractional model and its susceptibility on parameter changes

Autorzy:

Majka, Łukasz
Sowa, Marcin

Powiązania:

https://bibliotekanauki.pl/articles/376922.pdf

Data publikacji:

2020

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

exciter
measurements
fractional derivative
parameter estimation
numerical solver

Opis:

The paper concerns the application of fractional calculus in the modeling of a selected part of a power system generating unit, which is the high frequency AC exciter. The model’s fractional derivative-based generalization is recalled. The basis of the estimation process for the model consists of two sets of measurement waveforms. In order to solve the fractional and nonlinear problem – a numerical solver is applied. The solver and the estimation procedure have been both implemented in GNU Octave. The model parameter susceptibility is examined. The changes of each model parameter value is studied in a way that the influence on the model output is observed.

Źródło:

Poznan University of Technology Academic Journals. Electrical Engineering; 2020, 104; 87-98
1897-0737

Pojawia się w:

Poznan University of Technology Academic Journals. Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 24.

Tytuł:

Software tools in didactics of mathematics

Autorzy:

Dudzińska-Baryła, Renata
Kopańska-Bródka, Donata
Michalska, Ewa

Powiązania:

https://bibliotekanauki.pl/articles/421290.pdf

Data publikacji:

2015

Wydawca:

Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu

Tematy:

visualisations
GeoGebra
multi-objective programming
fuzzy sets
derivative

Opis:

The use of software tools in the teaching process allows us to enrich the traditional methods. Graphics and animation complement the text and create positive associations related to the presented content. Recent research shows that using the visual methods in teaching leads to better scores obtained by students. The aim of the paper is to present the dynamic visualisations of selected concepts taught in mathematics and other “quantitative” subjects at university. Our dynamic visualisations can be used during lectures to help students to better understand difficult ideas and dependencies, for example the derivate of a function, the concept of fuzzy sets and the operations on these sets as well as the concept of the best solution in multi-objective programming problems. Visualisations of these issues are prepared in GeoGebra, which combines algebra and geometry and allows for the dynamic visualisation of concepts with a mathematical background.

Źródło:

Didactics of Mathematics; 2015, 12(16); 35-46
1733-7941

Pojawia się w:

Didactics of Mathematics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Properties of novel composite alloys used for the engine pistons

Autorzy:

Kowalski, M.
Jankowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/949489.pdf

Data publikacji:

2017

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

novel composite alloys
engine pistons
thermal derivative analysis

Opis:

The article presents the results of the investigations cover novel composite silumins with new alloying additives, such as chromium and molybdenum (not yet used in this type of silumin) and increased content of nickel and copper. The samples strength tests were performed at room temperature (20°C) and at elevated temperatures (up to 350°C), and were carried out using the strength machine, equipped with the special climate chamber. The dimensional stability of the new aluminum alloy was investigated using the precision dilatometer. This device allows one to register and record the sample dimensions as a function of temperature, during sample heating and cooling. During the DTA crystallization process investigations, derivative curves have been determined, that allows the analysis of the solidification process and the analysis of the heat transfer process in the sample structure and phase transformations. In the article shows the derivative curve and representative microstructures, and characteristic temperatures for the conventional AlSi12 alloy and novel composite alloy. All research results indicated that the newly developed composite aluminum alloy has far better parameters than aluminum alloys used previously for pistons of the internal combustion engines. This article concludes with a summary of the advantages of the new composite alloys.

Źródło:

Journal of KONES; 2017, 24, 4; 109-116
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

Lifetime of a soluble solid particle in a stagnant medium: approximate analytical modelling involving fractional (half-time) derivatives

Autorzy:

Hristov, J.

Powiązania:

https://bibliotekanauki.pl/articles/779388.pdf

Data publikacji:

2013

Wydawca:

Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie

Tematy:

particle dissolution
analytical model
fractional half-time derivative

Opis:

Approximate analytical solutions concerning lifetime of soluble solid particles in an unbounded stagnant medium have been developed by simple application of fractional half-time derivative in the Riemann-Liouville sense to express the relationship between the net surface mass flux and the concentration at the interface. The solutions start with the initial formulation of Rice and Do on the time-depletion of the radius of a spherical particle expressed through terms including the solubility parameter as the only key parameter controlling the process of dissolution. The two approximate developed solutions use different scaling and dimensionless variables: The 1st solution is developed by an introduction of a similarity variable [xxx] while the 2nd solution applies the classical scaling using the initial sphere radius as a length scale that leads to dimensionless radius r = R/R0 and time τ = Dt/R02. Both solutions provide approximate relationships close to that of Rice and Do.

Źródło:

Polish Journal of Chemical Technology; 2013, 15, 3; 74-77
1509-8117
1899-4741

Pojawia się w:

Polish Journal of Chemical Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Some efficient seventh-order derivative-free families in root-finding

Autorzy:

Soleymani, F.

Powiązania:

https://bibliotekanauki.pl/articles/254710.pdf

Data publikacji:

2013

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

numerical analysis
derivative-free families
order
iterative methods

Opis:

The interest in efficient root-finding iterations is nowadays growing and influenced by the widespread use of high-speed computers. On the other hand, the calculation of derivatives is often hard, when the problems are formulated in terms of nonlinear equations and as a result, the importance of derivative-free methods emerges. For these reasons, some efficient three-step families of iterations for solving nonlinear equations are suggested, where the analytical proofs show their seventh-order error equations consuming only four function evaluations per iteration. We employ hard numerical test problems to illustrate the accuracy of the new methods from the families.

Źródło:

Opuscula Mathematica; 2013, 33, 1; 163-173
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Existence of minimal and maximal solutions to RL fractional integro-differential initial value problems

Autorzy:

Denton, Z.
Ramirez, J. D.

Powiązania:

https://bibliotekanauki.pl/articles/255901.pdf

Data publikacji:

2017

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

Riemann Liouville derivative
integro-differential equation
monotone method

Opis:

In this work we investigate integro-differential initial value problems with Riemann Liouville fractional derivatives where the forcing function is a sum of an increasing function and a decreasing function. We will apply the method of lower and upper solutions and develop two monotone iterative techniques by constructing two sequences that converge uniformly and monotonically to minimal and maximal solutions. In the first theorem we will construct two natural sequences and in the second theorem we will construct two intertwined sequences. Finally, we illustrate our results with an example.

Źródło:

Opuscula Mathematica; 2017, 37, 5; 705-724
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Generalized Isoperimetric FVPs Via Caputo Approach

Autorzy:

Taïeb, Amele
Dahmani, Zoubir

Powiązania:

https://bibliotekanauki.pl/articles/2188101.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Jagielloński. Wydawnictwo Uniwersytetu Jagiellońskiego

Tematy:

Caputo derivative
Fractional calculus of variations
isoperimetric problems

Opis:

In this paper, we study several fractional variational problems with functionals that contain n unknown functions with their higher order Caputo derivatives and Riemann–Liouville integrals. We prove generalized fractional Euler–Lagrange equations. We also study an isoperimetric problem with multiple constraints, and we find the optimality conditions. Some examples are provided to illustrate the applications of the results.

Źródło:

Universitatis Iagellonicae Acta Mathematica; 2019, 56; 23-40
2084-3828
0083-4386

Pojawia się w:

Universitatis Iagellonicae Acta Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

On fractional random differential equations with delay

Autorzy:

Vu, H.
Phung, N. N.
Phuong, N.

Powiązania:

https://bibliotekanauki.pl/articles/254723.pdf

Data publikacji:

2016

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

sample path fractional integral
sample path fractional derivative
fractional differential equations
sample fractional random differential equations
Caputo fractional derivative
delay

Opis:

In this paper, we consider the existence and uniqueness of solutions of the fractional random differential equations with delay. Moreover, some kind of boundedness of the solution is proven. Finally, the applicability of the theoretical results is illustrated with some real world examples.

Źródło:

Opuscula Mathematica; 2016, 36, 4; 541-556
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Sind Präfixbildungen Zusammensetzungen oder Ableitungen? – Die Zugehörigkeit der Wortbildungen mit Hilfe von Präfixen
Are word-formation using prefixes compositions or derivatives? - Belonging to wordforms with prefixes

Autorzy:

Bielewicz-Dubiec, Anna

Powiązania:

https://bibliotekanauki.pl/articles/16530399.pdf

Data publikacji:

2020

Wydawca:

Akademia im. Jakuba z Paradyża w Gorzowie Wielkopolskim

Tematy:

Wortbildung
Präfix
Kompositabildung
Derivation
word formation
prefix
composition
derivative

Opis:

Die Stellung von Komposition und Ableitung im Deutschen als den beiden Hauptmethoden der Wortbildung ist in der Wortbildung unbestritten. Im Folgenden wird geklärt, ob die Wortbildung mit den Präfixen zur Komposition oder zum Derivat gehört oder vielleicht eine eigenständige Gruppe darstellt. Die folgende Analyse beschränkt sich auf fünf Autoren: Henzen, Fleischer, Erben, Eichinger und Coseriu.
The position of composition and derivation in German as the two main methods of word formation are unquestionable in word formation. It will be explained below whether word formation by means of prefixes belongs to the composition or to the derivative, or on the other hand, whether it forms an independent group. The following analysis is limited to five authors: Henzen, Fleischer, Erben, Eichinger and Coseriu.

Źródło:

Studia – konteksty pogranicza; 2020, 4; 19-30
2543-6465

Pojawia się w:

Studia – konteksty pogranicza

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

On identities for derivative operators

Autorzy:

Baran, Mirosław
Ozorka, Paweł

Powiązania:

https://bibliotekanauki.pl/articles/93182.pdf

Data publikacji:

2019

Wydawca:

Państwowa Wyższa Szkoła Zawodowa w Tarnowie

Tematy:

derivative operator
polynomial inequality
operator instrumentów pochodnych
nierówność wielomianowa

Opis:

Let X be a commutative algebra with unity e and let D be a derivative on X that means the Leibniz rule is satisfied: D(f\cdot g)=D(f)\cdot g+f\cdot D(g). If D^{(k)} is k-th iteration of D then we prove that the following identity holds for any positive integer k frac{1}{k!}\sum\limits_{j=0}^k(-1)^j\binom{k}{j}f^jD^{(m)}(gf^{k-j})=\Phi_{k,m}(g,f)=\begin{cases}0,\ 0\leq m As an application we prove a sharo version of Bernstein’s inequality for trigonometric polynomials.

Źródło:

Science, Technology and Innovation; 2019, 7, 4; 13-16
2544-9125

Pojawia się w:

Science, Technology and Innovation

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Comparative in vitro studies on liposomal formulations of amphotericin B and its derivative, N-methyl-N-D-fructosyl amphotericin B methyl ester (MFAME).

Autorzy:

Cybulska, Barbara
Kupczyk, Karolina
Szlinder-Richter, Joanna
Borowski, Edward

Powiązania:

https://bibliotekanauki.pl/articles/1043809.pdf

Data publikacji:

2002

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

nontoxic antifungals
liposomal formulation
amphotericin B derivative
amphotericin B

Opis:

N-Methyl-N-D-fructosyl amphotericin B methyl ester (MFAME) is a semisynthetic derivative of the antifungal antibiotic amphotericin B (AMB). In contrast to the parent antibiotic, the derivative is characterised by low toxicity to mammalian cells and good solubility in water of its salts. Comparative studies on biological properties of free MFAME, AMB and their liposomal formulations were performed. To obtain liposomal forms, the antibiotics were incorporated into small unilamellar vesicles composed of dimyristoyl phosphatidylcholine (DMPC) and DMPC:cholesterol or ergosterol, 8:2 molar ratio. The effectivity of the liposomal and free forms of AMB and MFAME were compared by determination of fungistatic and fungicidal activity against Candida albicans ATCC 10261, potassium release from erythrocytes, and haemolysis. The results obtained indicate that in contrast to AMB, incorporation of MFAME into liposomes did not further improve its selective toxicity. Studies on the antagonistic effect of ergosterol and cholesterol on the antifungal activity of the antibiotics indicated that sterol interference was definitely less pronounced in the case of MFAME than in the case of AMB.

Źródło:

Acta Biochimica Polonica; 2002, 49, 1; 67-75
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

“gcdAlpha” – a semi-analytical method for solving fractional state equations

Autorzy:

Sowa, M.

Powiązania:

https://bibliotekanauki.pl/articles/377385.pdf

Data publikacji:

2018

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

semi-analytical method
fractional derivative
circuit analysis
different orders

Opis:

The paper discusses a semi-analytical method for solving systems of fractional state equations with various orders. The method bases on an expansion of the system into one where there is a single derivative order. The formulation of the matrices of the new system is explained in detail. Another characteristic feature of the method is also introduced – a consideration of forms, in which the time functions appear and the terms appearing in the solution as a result. A fractional circuit example is presented in order to test the method. The computation time for the method is also studied.

Źródło:

Poznan University of Technology Academic Journals. Electrical Engineering; 2018, 96; 231-242
1897-0737

Pojawia się w:

Poznan University of Technology Academic Journals. Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

$(H_p,L_p)$-type inequalities for the two-dimensional dyadic derivative

Autorzy:

Weisz, Ferenc

Powiązania:

https://bibliotekanauki.pl/articles/1287322.pdf

Data publikacji:

1996

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

Hardy spaces
p-atom
interpolation
Walsh functions
dyadic derivative

Opis:

It is shown that the restricted maximal operator of the two-dimensional dyadic derivative of the dyadic integral is bounded from the two-dimensional dyadic Hardy-Lorentz space $H_{p,q}$ to $L_{p,q}$ (2/3 < p < ∞, 0 < q ≤ ∞) and is of weak type $(L_1,L_1)$. As a consequence we show that the dyadic integral of a ∞ function $f ∈ L_1$ is dyadically differentiable and its derivative is f a.e.

Źródło:

Studia Mathematica; 1996, 120, 3; 271-288
0039-3223

Pojawia się w:

Studia Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Bayesian Pricing of an European Call Option Using a GARCH Model with Asymmetries
Bayesowska wycena europejskiej opcji kupna z wykorzystaniem modelu GARCH z asymetriami

Autorzy:

Osiewalski, Jacek
Pipień, Mateusz

Powiązania:

https://bibliotekanauki.pl/articles/906870.pdf

Data publikacji:

2004

Wydawca:

Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego

Tematy:

Bayesian inference
financial econometrics
volatility models
forecasting
derivative pricing

Opis:

In this paper option pricing is treated as an application of Bayesian predictive analysis. The distribution of the discounted payoff, induced by the predictive density of future observables, is the basis for direct option pricing, as in Bauwens and Lubrano (1997). We also consider another, more eclectic approach to option pricing, where the predictive distribution of the Black-Scholes value is used (with volatility measured by the conditional standard deviation at time of maturity). We use a model framework that allows for two types of asymmetry in GARCH processes: skewed t conditional densities and different reactions of conditional scale to positive/negative stocks. Our skewed t-GARCH(l, 1) model is used to describe daily changes of the Warsaw Stock Exchange Index (WIG) from 4.01.1995 till 8.02.2002. The data till 28.09.2001 are used to obtain the posterior and predictive distributions, and to illustrate Bayesian option pricing for the remaining period.
W prezentowanym artykule wycena opcji jest traktowana jako jedno z zastosowań bayesowskiej analizy predyktywnej. Rozkład wartości zdyskontowanej wypłaty, indukowany przez gęstość predyktywną przyszłych stóp zwrotu, jest podstawą bezpośredniej wyceny opcji (zob. Bauwens, Lubrano, 1997). Rozważamy też bardziej eklektyczne podejście, wykorzystujące rozkład predyktywny formuły Blacka i Scholesa (ze zmiennością określoną jako warunkowe odchylenie standardowe w momencie realizacji opcji). Przyjmujemy ramy modelowe, które uwzględniają dwa rodzaje asymetrii w procesach GARCH: skośne rozkłady warunkowe (typu t-Studenta) oraz zróżnicowane reakcje wariancji warunkowej na szoki dodatnie lub ujemne. Model: skośny £-GARCH(l, 1) jest stosowany do opisu dziennej zmienności Warszawskiego Indeksu Giełdowego (WIG) od 4.01.1995 r. do 8.02.2002 r. Dane do 28.09.2001 wykorzystujemy do budowy rozkładów a posteriori i predyktywnego oraz do ilustracji bayesowskiej wyceny opcji na pozostały okres.

Źródło:

Acta Universitatis Lodziensis. Folia Oeconomica; 2004, 177
0208-6018
2353-7663

Pojawia się w:

Acta Universitatis Lodziensis. Folia Oeconomica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

A multidimensional singular stochastic control problem on a finite time horizon

Autorzy:

Boryc, Marcin
Kruk, Łukasz

Powiązania:

https://bibliotekanauki.pl/articles/747102.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej

Tematy:

Singular stochastic control
generalized derivative
HJB equation
optimal control

Opis:

A singular stochastic control problem in n dimensions with timedependent coefficients on a finite time horizon is considered. We show that the value function for this problem is a generalized solution of the corresponding HJB equation with locally bounded second derivatives with respect to the space variables and the first derivative with respect to time. Moreover, we prove that an optimal control exists and is unique.

Źródło:

Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica; 2015, 69, 1
0365-1029
2083-7402

Pojawia się w:

Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Variable order 3D models of bone remodelling

Autorzy:

Valério, D.
Neto, J.
Vinga, S.

Powiązania:

https://bibliotekanauki.pl/articles/202197.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

variable-order derivative
bone remodelling
cancer
przebudowa kości
rak

Opis:

This paper presents simulations of a three-dimensional model of the bone remodelling process. The model consists of a set of variable order partial differential equations, in which the varying order depends on the presence of tumour cells. The simulations are of a two-dimensional bone, to make visualisation simpler. They show that this model corresponds to the known evolution of bone remodelling, and is simpler than integer order models found in the literature.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2019, 67, 3; 501-508
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Janusze, halyny, sebixy i karyny. Memy internetowe jako źródło nowych eponimów

Autorzy:

Burkacka, Iwona

Powiązania:

https://bibliotekanauki.pl/articles/2084130.pdf

Data publikacji:

2020-04

Wydawca:

Towarzystwo Kultury Języka

Tematy:

eponym
neosemantism
derivative
meme
word formation
appelativisation of onyms

Opis:

Internet memes are an important element of the modern culture and their vocabulary is transmitted to other texts thus becoming an important component of communication and familiarity with it becomes necessary for the understanding of various statements and utterances. The object of the description is the meme eponyms and their derivatives. In the analysis of derivative words, the nest methodology and synchronic word formation principles were applied, and in the description of their bases, i.e. eponyms identical to the base ones, references were made to the studies by B. Dereń and M. Rutkowski. The research permitted the determination of a high word formation activity of meme eponyms the status of which varies: some of them are stabilised, which allows their recognition as dictionary units, while others are textual. A large number of the structures have been created with the use of the same formants and word formation techniques. What deserves particular attention is verbs, which are very seldom coined based on first names. Similarities to creating eponyms based on last names can be seen in derivation. Adjectives with the suffi xes –owat(y) and –ow(y) are coined fairly often. The analysed eponyms and their derivatives refer to the stereotypes of Poles functioning in online texts, which differ from the self-stereotypes functioning in the Polish culture to date.

Źródło:

Poradnik Językowy; 2020, 773, 4; 21-34
0551-5343

Pojawia się w:

Poradnik Językowy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

CHARAKTERYSTYKA, KLASYFIKACJA I FUNKCJE INSTRUMENTÓW FINANSOWYCH
CHARACTERISTICS, CLASSIFICATION AND FUNCTIONS OF FINANCIAL INSTRUMENTS

Autorzy:

Skolimowska, Anna

Powiązania:

https://bibliotekanauki.pl/articles/546368.pdf

Data publikacji:

2019

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie

Tematy:

financial instruments,
securities,
derivative financial instruments,
bonds,
shares,
option

Opis:

The aim of this paper was to present main information about financial instruments. Financial instruments are very important for law and as well for economy; for this reason studies in this field are very broad and affects of many aspects. This article present a general characteristic, classification and main functions of financial instruments. The most important is the division of financial instruments on securities and derivative financial instruments. The derivatives market reallocates risk from the people who prefer risk aversion to the people who have an appetite for risk. Debt instruments are assets that require a fixed payment to the holder, usually with interest. The equity market (often referred to as the stock market) is the market for trading equity instrument.

Źródło:

Civitas et Lex; 2019, 2(22); 23-37
2392-0300

Pojawia się w:

Civitas et Lex

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Comparative studies on cell stimulatory, permeabilizing and toxic effects induced in sensitive and multidrug resistant fungal strains by amphotericin B (AMB) and N-methyl-N-D-fructosyl amphotericin B methyl ester (MFAME).

Autorzy:

Szlinder-Richert, Joanna
Cybulska, Barbara
Grzybowska, Jolanta
Borowski, Edward
Prasad, Rajendra

Powiązania:

https://bibliotekanauki.pl/articles/1044404.pdf

Data publikacji:

2000

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

antifungal action
amphotericin B derivative
multidrug resistance
amphotericin B

Opis:

N-Methyl-N-D-fructosyl-amphotericin B methyl ester (MFAME) is a new derivative of amphotericin B, which is characterised by low toxicity to mammalian cells and good solubility in water of its salts. The antifungal activity and effects of MFAME towards Candida albicans and Saccharomyces cerevisiae multidrug resistant MDR(+) and sensitive MDR(-) strains was compared with those of parent compound. The results obtained indicate that MDR(+) S. cerevisiae was sensitive to MFAME as well as to AMB. MFAME exhibited the same effects on fungal cells studied as parent antibiotic. The two antibiotics, depending on the dose applied induced cell stimulation, K+ efflux, and/or had a toxic effect.

Źródło:

Acta Biochimica Polonica; 2000, 47, 1; 133-140
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Hyperbolically convex functions II

Autorzy:

Ma, William
Minda, David

Powiązania:

https://bibliotekanauki.pl/articles/1294054.pdf

Data publikacji:

1999

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

hyperbolic convexity
two-variable characterization
Schwarzian derivative
distortion theorem

Opis:

Unlike those for euclidean convex functions, the known characterizations for hyperbolically convex functions usually contain terms that are not holomorphic. This makes hyperbolically convex functions much harder to investigate. We give a geometric proof of a two-variable characterization obtained by Mejia and Pommerenke. This characterization involves a function of two variables which is holomorphic in one of the two variables. Various applications of the two-variable characterization result in a number of analogies with the classical theory of euclidean convex functions. In particular, we obtain a uniform upper bound on the Schwarzian derivative. We also obtain the sharp lower bound on |f'(z)| for all z in the unit disk, and the sharp upper bound on |f'(z)| when |z| ≤ √2 - 1.

Źródło:

Annales Polonici Mathematici; 1999, 71, 3; 273-285
0066-2216

Pojawia się w:

Annales Polonici Mathematici

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 43.

Tytuł:

A note on Radon-Nikodym derivatives and similarity for completely bounded maps

Autorzy:

Gheondea, A.
Kavruk, A. S.

Powiązania:

https://bibliotekanauki.pl/articles/255174.pdf

Data publikacji:

2009

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

Radon-Nikodym derivative
C*-algebra
completely positive map
similarity

Opis:

We point out a relation between the Arveson's Radon-Nikodym derivative and known similarity results for completely bounded maps. We also consider Jordan type decompositions coming out from Wittstock's Decomposition Theorem and illustrate, by an example, the nonuniqueness of these decompositions.

Źródło:

Opuscula Mathematica; 2009, 29, 2; 139-145
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 44.

Tytuł:

Anthracene derivatives in some species of Rumex L. genus

Autorzy:

Wegiera, M
Smolarz, H.D.
Wianowska, D.
Dawidowicz, A.L.

Powiązania:

https://bibliotekanauki.pl/articles/58287.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Botaniczne

Tematy:

anthracene derivative
determination
Rumex
botany
leaf
fruit
root
identification

Opis:

Eight anthracene derivatives (chrysophanol, physcion, emodin, aloe-emodin, rhein, barbaloin, sennoside A and sennoside B) were signified in six species of Rumex L. genus: R. acetosa L., R. acetosella L., R. confertus Willd., R. crispus L., R. hydrolapathum Huds. and R. obtusifolius L. For the investigations methanolic extracts were prepared from the roots, leaves and fruits of these species. Reverse Phase High Performance Liquid Chromatography was applied for separation, identification and quantitative determination of anthracene derivatives. The identity of these compounds was further confirmed with UV-VIS. Received data were compared. The roots are the best organs for the accumulation of anthraquinones. The total amount of the detected compounds was the largest in the roots of R. confertus (163.42 mg/g), smaller in roots R. crispus (25.22 mg/g) and the smallest in roots of R. hydrolapathum (1.02 mg/g).

Źródło:

Acta Societatis Botanicorum Poloniae; 2007, 76, 2
0001-6977
2083-9480

Pojawia się w:

Acta Societatis Botanicorum Poloniae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 45.

Tytuł:

The role of magnesium in the protection of entomopathogenic nematodes from soil pollution with oil derivatives
Rola magnezu w ochronie owadobójczych nicieni w przypadku zanieczyszczenia gleby substancjami ropopochodnymi

Autorzy:

Jaworska, M.

Powiązania:

https://bibliotekanauki.pl/articles/14553.pdf

Data publikacji:

2014

Wydawca:

Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza

Tematy:

magnesium
nematode
protection
entomopathogenic nematode
soil pollution
oil derivative

Opis:

The aim of the paper was to identify the influence of magnesium on the preservation of pathogenic abilities of entomopathogenic nematodes living in soil contaminated with oil derivatives. Entomopathogenic nematodes living under natural conditions in soil or applied to soil as biopreparations for plant pest control are sensitive to soil contamination with heavy metals and oil derivatives. These nematodes do not respond directly by higher mortality but by a decrease in their pathogenic abilities, which adversely affects the success in searching and eliminating pests. A Polish commercial preparation called Owinema SC, containing infective juveniles of Steinernema feltiae Filipjev (Rhabditida: Steinernematidae), was used to test the effect of oil derivatives on pathogenicity and reproduction of entomopathogenic nematodes. Soil was polluted with petrol, diesel oil and used engine oil; the control was soil unpolluted with oil derivatives. Magnesium sulphate was also added (MgSO4∙H2O) in the amount of 160 mg per 1 liter of the suspension. The three oil derivatives in concentrations of: 0.3, 0.6 and 1.0 g or in double doses, i.e. 0.6, 1.2 and 2.0 g were poured over weighted soil batches. The control remained intact. Three replications of each treatment were made. Subsequently, Tenebrio molitor L. larvae used as bait inesct were placed in containers with the suspension. The bait insects were kept in the containers for 7 days, and afterwards they were removed from the soil and taken from the traps in order to check their mortality rate. Furthermore, to test the reproduction ability of entomopathogenic nematodes, dead larvae were moved to “islands” previously prepared according to the Dutky method. The results were presented as the number of entomopathogenic nematodes per 1 dead larvae of Tenebrio molitor L.
Celem pracy było rozeznanie wpływu magnezu na ochronę zdolności patogenicznych owadobójczych nicieni przebywających w glebie skażonej substancjami ropopochodnymi. Owadobójcze nicienie żyjące w warunkach naturalnych w glebie, a także stosowane doglebowo jako biopreparaty do zwalczania szkodników roślin, są wrażliwe na skażenie gleby metalami ciężkimi oraz substancjami ropopochodnymi. Nicienie te nie reagują wówczas śmiertelnością, ale zmniejszeniem zdolności patogenicznych, co wpływa na ich efektywność w wyszukiwaniu i zabijaniu szkodników roślin. W doświadczeniu laboratoryjnym wykazano, że siarczan magnezu dodany do gleby skażonej substancjami ropopochodnymi zwiększa zdolności patogeniczne nicieni, ale nie reprodukcje wewnątrz owadów żywicielskich. Owinema S.C. – polski preparat komercyjny zawierający larwy inwazyjne Steinernema feltiae (Rhabditis, Steinernematidae) – używano w testach laboratoryjnych nad oddziaływaniem zanieczyszczenia ropopochodnymi na patogeniczność i reprodukcje owadobójczych nicieni. Glebę zanieczyszczono benzyną, olejem i olejem silnikowym. Dodano siarczan magnezu (MgSO4 H2O) w dawce 160 mg l-1 zawiesiny. Ropopochodne użyto w dawkach 0,3 g, 0,6 g i 1,0 g lub podwójnej, tj. 0,6 g, 1,2 g i 2,0 g. Gleba nie zanieczyszczona stanowiła próbę kontrolną. W pojemniku z glebą umieszczono owady testowe – larwy mączlika młynarka Tenebrio molitor L. Owady po 7 dniach wyjmowano i sprawdzono ich śmiertelność związaną z patogenicznością nicieni i zanieczyszczeniem ropopochodnymi. Zdolności reprodukcji nicieni badano metodą Dutkego na „wyspach” szkiełek w szalkach. Wyniki przedstawiono jako liczebność larw nicieni z 1 martwej larwy owada T. monitor.

Źródło:

Journal of Elementology; 2014, 19, 3
1644-2296

Pojawia się w:

Journal of Elementology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 46.

Tytuł:

A subinterval-based method for circuits with fractional order elements

Autorzy:

Sowa, M.

Powiązania:

https://bibliotekanauki.pl/articles/201236.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

fractional derivative
circuit equations
numerical method
polynomial interpolation
subinterval

Opis:

The paper deals with the solution of problems that concern fractional time derivatives. Specifically the author’s interest lies in solving circuit problems with so called fractional capacitors and fractional inductors. A numerical method is proposed that involves polynomial interpolation and the division of the entire time interval (for which computations are performed) into subintervals. Analytical formulae are derived for the integro-differentiation according to the Caputo fractional derivative. The rules that concern the subinterval dynamics throughout the computation are also presented in the paper. For exemplary linear circuit problems (AC and transient) involving fractional order elements the solutions have been obtained. These solutions are compared with ones obtained by means of traditional methods.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 449-454
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 47.

Tytuł:

Hydrocarbons on sea water: steady-state spreading signatures determined by an optical method

Autorzy:

Boniewicz-Szmyt, K.
Pogorzelski, S.
Mazurek, A.

Powiązania:

https://bibliotekanauki.pl/articles/49155.pdf

Data publikacji:

2007

Wydawca:

Polska Akademia Nauk. Instytut Oceanologii PAN

Tematy:

oil pollution
optical method
sea water
hydrocarbon
contamination
petroleum derivative

Opis:

The spreading properties of several hydrocarbons (vegetable, engine, gear and crude oils) on distilled and artificial sea water were determined under laboratory conditions using a novel optical method. With the aid of Langmuir’s equation, the geometrical signatures of a discrete lens of each hydrocarbon droplet floating on a water tank served to calculate the entering E (31.30–94.18 mN m−1) and spreading S (−3.50 to −57.49 mN m−1) coefficients, and equilibrium thicknesses t∞ (0.20–1.25 cm). They appeared to be in agreement with the values derived from direct interfacial tension measurements (Wilhelmy plate and stalagmometer methods). Empirical relations of the normalized lens radius rL/rdrop and S on the water surface tension γAW were postulated as being of significant value in oil spill assessment studies at sea. The parameters obtained together with the surface properties of a natural surfactant-containing water body represent the principal input data required for modelling the spreading of a surface-tension-gradient-driven oil spill at sea.

Źródło:

Oceanologia; 2007, 49, 3
0078-3234

Pojawia się w:

Oceanologia

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 48.

Tytuł:

Analysis of linear continuous-time systems by the use of the conformable fractional calculus and Caputo

Autorzy:

Piotrowska, E.

Powiązania:

https://bibliotekanauki.pl/articles/141097.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

conformable fractional derivative
fractional electrical circuit
different fractional order system

Opis:

The paper presents general solutions for fractional state-space equations. The analysis of the fractional electrical circuit in the transient state is described by the equation of the state and space equations. The results are presented for the voltage of a capacitor and current in a coil, for different alpha values. The Caputo and conformable fractional derivative definitions have been considered. At the end, the results have been obtained.

Źródło:

Archives of Electrical Engineering; 2018, 67, 3; 629--639
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

An existence theorem for set differential inclusions in a semilinear metric space

Autorzy:

De Blasi, F. S.
Lakshmikantham, V.
Bhaskar, T. G.

Powiązania:

https://bibliotekanauki.pl/articles/970280.pdf

Data publikacji:

2007

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

approximate continuous selections
Cauchy problem
set differential inclusions
Hukuhara derivative

Opis:

Using the notion of continuous approximate selections, we establish an existence theorem for set differential inclusions in a semi-linear metric space.

Źródło:

Control and Cybernetics; 2007, 36, 3; 571-582
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 50.

Tytuł:

Rachunkowość zabezpieczeń grupy kapitałowej. Studium przypadku
Hedge accounting for capital group. Case study

Autorzy:

Barczyk, Krystyna

Powiązania:

https://bibliotekanauki.pl/articles/593520.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Ekonomiczny w Katowicach

Tematy:

Instrumenty pochodne
Rachunkowość zabezpieczeń
Ryzyko
Derivative instruments
Hedge accounting
Risk

Opis:

Rachunkowość zabezpieczeń jest uznawana za jeden z najbardziej zaawansowanych i najtrudniejszych obszarów rachunkowości. Zastosowanie rachunkowości zabezpieczeń ma na celu uchronić wartość wyniku finansowego przed nadmierną fluktuacją. Wykorzystywanie instrumentów pochodnych w celu zabezpieczenia jednostki przed zmiennością czynników zewnętrznych nie jest tożsame ze stosowaniem rachunkowości zabezpieczeń. Artykuł analizuje zasady ewidencji oraz prezentacji instrumentów pochodnych przez Grupę Kapitałową ABC w celu zabezpieczania przed ryzykiem zmienności przepływów pieniężnych oraz wyników finansowych wyrażonych w walutach krajowych ze względu na zmiany cen materiałów i towarów.
Hedge accounting is recognized as one of the most advanced and the most difficult areas of accounting. The application of hedge accounting is to protect the value of the financial result against excessive fluctuation. The use of derivative instruments to hedge volatility of the individual against external factors is not identical to the application of hedge accounting. This article presents and examines the principles of records (accounting principles) and the presentation of derivative instruments by the Group ABC to hedge against the risk of fluctuations in cash flows (cash flow hedge) and the financial results denominated in national currencies due to changes in the prices of materials and goods.

Źródło:

Studia Ekonomiczne; 2015, 225; 7-17
2083-8611

Pojawia się w:

Studia Ekonomiczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 51.

Tytuł:

Solutions to fractional diffusion-wave equation in a circular sector

Autorzy:

Povstenko, Y.

Powiązania:

https://bibliotekanauki.pl/articles/121674.pdf

Data publikacji:

2013

Wydawca:

Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane

Tematy:

Mittag-Leffler function
Caputo derivative
funkcja Mittag-Lefflera
pochodna Caputo

Opis:

The time-fractional diffusion-wave equation with the Caputo derivative of the order 0 < α ≤ 2 is considered in a domain 0 ≤ r < R, 0 < ϕ < ϕ0 under different boundary conditions. The Laplace integral transform with respect to time, the finite Fourier transforms with respect to the angular coordinate, and the finite Hankel transforms with respect to the radial coordinate are used. The fundamental solutions are expressed in terms of the Mittag-Leffler function. The particular cases of the obtained solutions corresponding to the diffusion equation (α = 1) and the wave equation (α = 2) coincide with those known in the literature.

Źródło:

Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2013, 18; 41-54
2450-9302

Pojawia się w:

Scientific Issues of Jan Długosz University in Częstochowa. Mathematics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 52.

Tytuł:

Existence results for random fractional differential equations

Autorzy:

Lupulescu, V.
O’Regan, D.
Rahman ur, G.

Powiązania:

https://bibliotekanauki.pl/articles/255930.pdf

Data publikacji:

2014

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

random fractional differential equations
fractional integral
Caputo fractional derivative
existence

Opis:

In this paper, an existence result for a random fractional differential equation is established under a Carathéodory condition. Existence results for extremal random solutions are also proved. Finally, an existence and uniqueness result is given.

Źródło:

Opuscula Mathematica; 2014, 34, 4; 813-825
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 53.

Tytuł:

Inequalities concerning polar derivative of polynomials

Autorzy:

Ahuja, Arty
Dewan, K. K.
Hans, Sunil

Powiązania:

https://bibliotekanauki.pl/articles/747153.pdf

Data publikacji:

2011

Wydawca:

Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej

Tematy:

Polynomials
maximum modulus
inequalities in the complex domain
polar derivative

Opis:

In this paper we obtain certain results for the polar derivative of a polynomial \(p(z) = c_nz^n +\sum_{j=\mu}^n c_{n-j}z^{n-j}\), \(1\leq\mu\leq n\), having all its zeros on \(|z| = k\), \(k\leq 1\), which generalizes the results due to Dewan and Mir, Dewan and Hans. We also obtain certain new inequalities concerning the maximum modulus of a polynomial with restricted zeros. [Editor's note: There are flaws in the paper, see M. A. Qazi, Remarks on some recent results about polynomials with restricted zeros, Ann. Univ. Mariae Curie-Skłodowska Sect. A 67 (2), (2013), 59-64 ]

Źródło:

Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica; 2011, 65, 1
0365-1029
2083-7402

Pojawia się w:

Annales Universitatis Mariae Curie-Skłodowska, sectio A – Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 54.

Tytuł:

Thermal Assessment of Modified Ultra-Light Magnesium-Lithium Alloys

Autorzy:

Król, M.
Mikuszewski, T.
Kuc, D.
Tański, T.
Hadasik, E.

Powiązania:

https://bibliotekanauki.pl/articles/354863.pdf

Data publikacji:

2017

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

cast magnesium-lithium alloys
crystallisation
thermal-derivative analysis
grain refinement

Opis:

The paper presents the results of the influence of commercial TiBor and AlSr10 master alloys on the refine the grains size, hardness and crystallisation process based on the thermal-derivation analysis of light cast magnesium-lithium-aluminium alloys. The effects of TiBor and AlSr10 content on the characteristic parameters of the crystallisation process of Mg-Li-Al alloys were investigated by thermal-derivative analysis (TDA). Microstructural evaluations were identified by light microscope, X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The results showed that the addition of TiBor master alloy reduced the grain size of Mg-9Li-1.5Al cast alloy from 900 μm to 500 μm, while the addition of AlSr10 master alloy reduced the grain size of investigated cast alloy from 900 μm to 480 μm. Moreover, an addition of TiBor and AlSr10 simultaneously reduced the grain size from 900 μm to 430 μm. Results from the thermal-derivative analysis showed that the addition of grain refinement causes a decrease in nucleation temperature and solidus temperature.

Źródło:

Archives of Metallurgy and Materials; 2017, 62, 4; 2433-2440
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 55.

Tytuł:

On relations among the generalized second-order directional derivatives

Autorzy:

Pastor, Karel

Powiązania:

https://bibliotekanauki.pl/articles/729322.pdf

Data publikacji:

2001

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

generalized second-order directional derivative
convexity
second-order optimality conditions

Opis:

In the paper, we deal with the relations among several generalized second-order directional derivatives. The results partially solve the problem which of the second-order optimality conditions is more useful.

Źródło:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2001, 21, 2; 235-247
1509-9407

Pojawia się w:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 56.

Tytuł:

On controllability of fractional positive continuous-time linear systems with delay

Autorzy:

Sikora, Beata
Matlok, Natalia

Powiązania:

https://bibliotekanauki.pl/articles/1409030.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

fractional systems
positive systems
Caputo derivative
controllability
delay
Metzler matrix

Opis:

In the paper positive fractional continuous-time linear systems are considered. Positive fractional systems without delays and positive fractional systems with a single delay in control are studied. New criteria for approximate and exact controllability of systems without delays as well as a relative controllability criterion of systems with delay are established and proved. Numerical examples are presented for different controllability criteria. A practical application is proposed.

Źródło:

Archives of Control Sciences; 2021, 31, 1; 29-51
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 57.

Tytuł:

Study on the structure of sulphur derivatives of haemin

Autorzy:

Jankiewicz, L.
Kwasny, M.
Bytniewska, J.
Graczyk, A.

Powiązania:

https://bibliotekanauki.pl/articles/1371717.pdf

Data publikacji:

1992

Wydawca:

Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie

Tematy:

pigment
meat
meat tissue
sulphur derivative
hemin
colour
meat product

Źródło:

Polish Journal of Food and Nutrition Sciences; 1992, 01, 1; 51-57
1230-0322
2083-6007

Pojawia się w:

Polish Journal of Food and Nutrition Sciences

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 58.

Tytuł:

Boundary value problems for differential inclusions with fractional order

Autorzy:

Benchohra, Mouffak
Hamani, Samira

Powiązania:

https://bibliotekanauki.pl/articles/729463.pdf

Data publikacji:

2008

Wydawca:

Uniwersytet Zielonogórski. Wydział Matematyki, Informatyki i Ekonometrii

Tematy:

differential inclusion
Caputo fractional derivative
fractional integral
existence
fixed point

Opis:

In this paper, we shall establish sufficient conditions for the existence of solutions for a boundary value problem for fractional differential inclusions. Both cases of convex valued and nonconvex valued right hand sides are considered.

Źródło:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization; 2008, 28, 1; 147-164
1509-9407

Pojawia się w:

Discussiones Mathematicae, Differential Inclusions, Control and Optimization

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 59.

Tytuł:

Linkages of natural gas and oil futures prices on the American and European derivatives market

Autorzy:

Łęt, Blanka

Powiązania:

https://bibliotekanauki.pl/articles/584121.pdf

Data publikacji:

2017

Wydawca:

Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu

Tematy:

natural gas
crude oil
derivative market
constant conditional correlation model

Opis:

In recent years, the world natural gas market is changing mainly due to the wid-er access to LNG (Liquefied Natural Gas). This technology allows to trade between the market participants all over the world. The natural gas prices on the American and European market are benchmarked to Henry Hub and National Balancing Point (NBP) natural gas. The goal of this paper is to investigate whether the listings of natural gas in the derivatives markets are linked and to analyse the relationship between natural gas and crude oil prices. We show that the probability distribution of returns is not normal and that there is a strong ARCH effect. We use multivariate GARCH model to describe the linkages between several series. We take into account two return series of natural gas futures contracts (Henry Hub and National Balancing Point) and two returns series of crude oil futures contracts (West Texas Intermediate and Brent) to measure the strength of linkages across two commodity markets of the most important fossil fuels.

Źródło:

Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu; 2017, 482; 158-168
1899-3192

Pojawia się w:

Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 60.

Tytuł:

Generalized J-integral method for sensitivity analysis of static shape design

Autorzy:

Ohtsuka, K.
Chludnev, A.

Powiązania:

https://bibliotekanauki.pl/articles/205915.pdf

Data publikacji:

2000

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

derivative of energy functional
domain perturbation
GJ-integral
sensitivity analysis

Opis:

The paper analyses the concept of GJ-integral. This concept is linked with the derivative of the energy functional with respect to a general perturbation of the domain and it is useful in studying many problems of sensitivity analysis. Applications of the GJ-integral method to numerous linear and nonlinear problems are indicated.

Źródło:

Control and Cybernetics; 2000, 29, 2; 513-533
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 61.

Tytuł:

Axisymmetric solutions to the Cauchy problem for time-fractional diffusion equation in a circle

Autorzy:

Povstenko, Y.

Powiązania:

https://bibliotekanauki.pl/articles/121736.pdf

Data publikacji:

2010

Wydawca:

Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane

Tematy:

Cauchy problem
circle
Caputo fractional derivative
problem Cauchy'ego
koło

Opis:

The Cauchy problems for time-fractional diffusion equation with delta pulse initial value of a sought-for function is studied in a circle domain in the axisymmetric case under zero Dirichlet and Neumann boundary conditions, respectively. The Caputo fractional derivative is used. The Laplace and finite Hankel integral transforms are employed. The results are illustrated graphically.

Źródło:

Scientific Issues of Jan Długosz University in Częstochowa. Mathematics; 2010, 15; 109-117
2450-9302

Pojawia się w:

Scientific Issues of Jan Długosz University in Częstochowa. Mathematics

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 62.

Tytuł:

DAQ-based measurements and study of supercapacitor frequency characteristics

Autorzy:

Sowa, Marcin
Jakubowska-Ciszek, Agnieszka

Powiązania:

https://bibliotekanauki.pl/articles/376459.pdf

Data publikacji:

2019

Wydawca:

Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej

Tematy:

supercapacitor
frequency characteristics
data acquisition device
measurement card
fractional derivative

Opis:

The paper concerns the beginning of a modeling study for supercapacitors. A data acquisition (DAQ) based system is presented, where an automated procedure has been implemented for the measurement of frequency characteristics. For a typical range of the supply voltage the characteristics are obtained. A model basing on fractional calculus is recalled and parameters for the model are obtained. The frequency characteristics of the model are compared with those obtained from measurements. Later the tested supercapacitor has its characteristics taken for various amplitudes and offsets of the source voltage. A few remarks are given for a possible expansion of the model when nonlinearity should be considered.

Źródło:

Poznan University of Technology Academic Journals. Electrical Engineering; 2019, 97; 203-213
1897-0737

Pojawia się w:

Poznan University of Technology Academic Journals. Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 63.

Tytuł:

PEG mediated eco-friendly one pot sunthesis of benzylamine coumarin derivatives using multicomponent reactant

Autorzy:

Viradiya, D. J.
Kotadiya, V. C
Khunt, M. D.
Baria, B. H.
Bhoya, U. C.

Powiązania:

https://bibliotekanauki.pl/articles/412545.pdf

Data publikacji:

2014

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

one pot reaction
benzylamine coumarin derivative
green synthesis
PEG-400

Opis:

A green resourceful, eco-friendly and facile protocol was developed for the synthesis of benzylamine coumarin derivatives by the reaction of 4-hydroxy coumarin, secondary amine and aromatic aldehyde in the presence of PEG400 as a solvent as well as catalyst at room temperature. A wide range of functional groups were tolerated in the developed protocol. The structures of all the synthesized compounds were confirmed by 1H NMR, IR, MASS and Elemental Analysis. The target molecules were obtained in good to excellent yield applying this method.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 177-184
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 64.

Tytuł:

Monotone iterative technique for fractional differential equations with periodic boundary conditions

Autorzy:

Ramirez, J. D.
Vatsala, A. S.

Powiązania:

https://bibliotekanauki.pl/articles/255247.pdf

Data publikacji:

2009

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

Riemann-Liouville fractional derivative
monotone method
periodic boundary value problem

Opis:

In this paper we develop Monotone Method using upper and lower solutions for fractional differential equations with periodic boundary conditions. Initially we develop a comparison result and prove that the solution of the linear fractional differential equation with periodic boundary condition exists and is unique. Using this we develop iterates which converge uniformly monotonically to minimal and maximal solutions of the nonlinear fractional differential equations with periodic boundary conditions in the weighted norm.

Źródło:

Opuscula Mathematica; 2009, 29, 3; 289-304
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 65.

Tytuł:

Mittag-Leffler stability for a Timoshenko problem

Autorzy:

Tatar, Nasser-eddine

Powiązania:

https://bibliotekanauki.pl/articles/1838213.pdf

Data publikacji:

2021

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

Caputo fractional derivative
Mittag-Leffler stability
multiplier technique
resolvent operator

Opis:

A Timoshenko system of a fractional order between zero and one is investigated here. Using a fractional version of resolvents, we establish an existence and uniqueness theorem in an appropriate space. Moreover, it is proved that lower order fractional terms (in the rotation component) are capable of stabilizing the system in a Mittag-Leffler fashion. Therefore, they deserve to be called damping terms. This is shown through the introduction of some new functionals and some fractional inequalities, and the establishment of some properties, involving fractional derivatives. In the case of different wave speeds of propagation we obtain convergence to zero.

Źródło:

International Journal of Applied Mathematics and Computer Science; 2021, 31, 2; 219-232
1641-876X
2083-8492

Pojawia się w:

International Journal of Applied Mathematics and Computer Science

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 66.

Tytuł:

Leśne gniazdo toponimiczne
The Forest Toponimic Nest

Autorzy:

Makarski, Władysław

Powiązania:

https://bibliotekanauki.pl/articles/1953857.pdf

Data publikacji:

2005

Wydawca:

Katolicki Uniwersytet Lubelski Jana Pawła II. Towarzystwo Naukowe KUL

Tematy:

toponimiczne pole semantyczne
derywacja toponimiczna
toponimic semantic field
toponimic derivative

Opis:

The subject matter of the paper are local names (microtoponims, oiconims, and macrotoponims) derived from the noun las (forest, wood) and its direct derivatives: leśny (woody), lasek (wood, grove), laska ‘leszczyna’ (hazel bough), and indirect of the kind of laskowy, leszcze ‘leszczyna’, leśnik (forester), leśniczy (forester), leśnictwo (forestry), and others. Toponims constructed on this popular lexical basis are varied with regard to form and semantics. One can find in this material synonymous series in the form of physiographics: Lesica, Laskówka, Laskowic, Leszcze(-a), Leszczyna, Leszczyniec, Leszczyniak, all of them denoting a hazel place or Lesice, Leśnie(-o)wice, Lasowice, Leśce, denoting people of the forest. With the same plural forms, and also singular in the form of Laskowa, Laskówka, is connected with phenomenon of homonymy with regard to their appelative or anthroponimic basis. Therefore they may also be treated as potential derivative (singular) or patronymic (plural) forms. The toponimic “leśne” (woody) field presented here, together with others, fills in the onomastic map of a concrete area. Its morphological and semantic wealth, stemming from the appelative basis of the language, makes its that it is an important component, not only a margin, as it sometimes thought.

Źródło:

Roczniki Humanistyczne; 2005, 53, 6; 81-98
0035-7707

Pojawia się w:

Roczniki Humanistyczne

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 67.

Tytuł:

Optimality conditions for preinvex functions using symmetric derivative

Autorzy:

Rastogi, Sachin
Iqbal, Akhlad
Rajan, Sanjeev

Powiązania:

https://bibliotekanauki.pl/articles/2204082.pdf

Data publikacji:

2022

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

invex set
preinvex function
symmetric derivative
Fritz John optimality conditions

Opis:

As a generalization of convex functions and derivatives, in this paper, the authors study the concept of a symmetric derivative for preinvex functions. Using symmetrical differentiation, they discuss an important characterization for preinvex functions and define symmetrically pseudo-invex and symmetrically quasi-invex functions. They also generalize the first derivative theorem for symmetrically differentiable functions and establish some relationships between symmetrically pseudo-invex and symmetrically quasi-invex functions. They also discuss the Fritz John type optimality conditions for preinvex, symmetrically pseudo-invex and symmetrically quasi-invex functions using symmetrical differentiability.

Źródło:

Operations Research and Decisions; 2022, 32, 4; 91--101
2081-8858
2391-6060

Pojawia się w:

Operations Research and Decisions

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 68.

Tytuł:

The fractional derivative rheological model and the linear viscoelastic behavior of hydrocolloids

Autorzy:

Orczykowska, M.
Dziubiński, M.

Powiązania:

https://bibliotekanauki.pl/articles/185109.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

guma ksantanowa
hydrokoloidy
hydrocolloids
fractional derivative rheological model
xanthan gum

Opis:

This study was aimed at evaluating the possibility to use the Friedrich-Braun fractional derivativerheological model to assess the viscoelastic properties of xanthan gum with rice starch and sweet potato starch. The Friedrich-Braun fractional derivative rheological model allows to describe viscoelastic properties comprehensively, starting from the behaviour characteristic of purely viscous fluids to the behaviour corresponding to elastic solids. The Friedrich-Braun fractional derivative rheological model has one more virtue which distinguishes it from other models, it allows to determine the relationship between stress and strain and the impact of each of them on viscoelastic properties on the tested material. An analysis of the data described using the Friedrich-Braun fractional derivative rheological model allows to state that all the tested mixtures of starch with xanthan gum form macromolecular gels exhibiting behaviour typical of viscoelastic quasi-solid bodies. The Friedrich-Braun fractional derivative rheological model and 8 rheological parameters of this model allow to determine changes in the structure of the examined starch - xanthan gum mixtures. Similarly important is the possibility to find out the trend and changes going on in this structure as well as their causes.

Źródło:

Chemical and Process Engineering; 2012, 33, 1; 141-151
0208-6425
2300-1925

Pojawia się w:

Chemical and Process Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 69.

Tytuł:

Stabilization of multivariable linear time-invariant systems by proportional-plus-derivative state feedback

Autorzy:

Kiritsis, Konstadinos H.

Powiązania:

https://bibliotekanauki.pl/articles/31342764.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

stabilization
proportional-plus-derivative state feedback
linear time-invariant systems

Opis:

This paper is devoted to the study of the problem of stabilization by proportional-plus-derivative state feedback for multivariable linear time-invariant systems. In particular, explicit necessary and sufficient conditions are established for the stability of a closed-loop system obtained by proportional-plus-derivative state feedback from the given multivariable linear time-invariant system. A procedure is given for the computation of stabilizing proportional- plus-derivative state feedback. Our approach is based on properties of real and polynomial matrices.

Źródło:

Control and Cybernetics; 2023, 52, 1; 53-77
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 70.

Tytuł:

Surface Water Polluted with Petroleum-Derivative Substances in Podlasie Region
Zanieczyszczenie wody powierzchniowej substancjami ropopochodnymi na Podlasiu

Autorzy:

Piekutin, J.

Powiązania:

https://bibliotekanauki.pl/articles/389036.pdf

Data publikacji:

2011

Wydawca:

Towarzystwo Chemii i Inżynierii Ekologicznej

Tematy:

woda powierzchniowa
substancje ropopochodne
transport
surface water
petroleum-derivative substances
motorization

Opis:

Subject of this work is to reveal the occurrence of petroleum-derivatives substances in surface water in Podlasie. Water samples were taken in test points localized on rivers cut by varied amount of traffic routes and roads with different surface quality. In water was determined: total suspension, CODMn, chlorides, sum of petroleum hydrocarbons, mineral oil index and lead. The result of conducted research in water samples was content of petroleum-derivative substances expressed in mineral oil index and sum of hydrocarbons, lead and chlorides, high concentration of easily decomposable substances and variable suspension value. Presented material indicates problem’s seriousness and proves necessity of making more.
Przedmiotem pracy są substancje ropopochodne w wodach powierzchniowych Podlasia. Próbki wody pobierano w punktach zlokalizowanych na rzekach przecinanych przez zróżnicowaną liczbę tras komunikacyjnych o kontrastowym natężeniu ruchu oraz trasy o różnej jakości nawierzchni. W wodzie oznaczano: zawiesinę ogólną, ChZT-Mn, chlorki, sumę węglowodorów ropopochodnych, indeks oleju mineralnego i ołów. W wyniku przeprowadzonych badań w próbkach wody stwierdzono zawartość substancji ropopochodnych wyrażonych poprzez indeks oleju mineralnego i sumę węglowodorów, ołowiu i chlorków, duże stężenie substancji organicznych łatwo rozkładalnych i zmienną zawartość zawiesiny. Przedstawiony materiał sygnalizuje wagę problemu i dowodzi konieczności dalszych, szczegółowych badań w tym zakresie.

Źródło:

Ecological Chemistry and Engineering. A; 2011, 18, 9-10; 1321-1326
1898-6188
2084-4530

Pojawia się w:

Ecological Chemistry and Engineering. A

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 71.

Tytuł:

On the asymptotic behavior of nonoscillatory solutions of certain fractional differential equations with positive and negative terms

Autorzy:

Graef, John R.
Grace, Said R.
Tune, Ercan

Powiązania:

https://bibliotekanauki.pl/articles/255164.pdf

Data publikacji:

2020

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

integro-differential equations fractional differential equations nonoscillatory solutions boundedness
Caputo derivative

Opis:

This paper is concerned with the asymptotic behavior of the nonoscillatory solutions of the forced fractional differential equation with positive and negative terms of the form [formula] where t ≥ c ≥ α ∈(0, 1), η ≥ 1 is the ratio of positive odd integers, and [formula] denotes the Caputo fractional derivative of y of order α. The cases [formula] are considered. The approach taken here can be applied to other related fractional differential equations. Examples are provided to illustrate the relevance of the results obtained.

Źródło:

Opuscula Mathematica; 2020, 40, 2; 227-239
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 72.

Tytuł:

Modulating element method in the identification of a generalized dynamical system

Autorzy:

Wysocki, Hubert
Zellma, Marek

Powiązania:

https://bibliotekanauki.pl/articles/1340449.pdf

Data publikacji:

1995

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

identification
dynamical system
modulating element
integral
derivative
limit condition
operational calculus

Opis:

In this paper the identification of generalized linear dynamical differential systems by the method of modulating elements is presented. The dynamical system is described in the Bittner operational calculus by an abstract linear differential equation with constant coefficients. The presented general method can be used in the identification of stationary continuous dynamical systems with compensating parameters and for certain nonstationary compensating or distributed parameter systems.

Źródło:

Applicationes Mathematicae; 1993-1995, 22, 4; 447-467
1233-7234

Pojawia się w:

Applicationes Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 73.

Tytuł:

The Effect of Hydrazide group on the oxydation of ferrocene at two different electrodes using Rotating Disk Electrode (RDE) in organic medium

Autorzy:

Nacer, S. N.
Lanez, T.

Powiązania:

https://bibliotekanauki.pl/articles/412271.pdf

Data publikacji:

2013

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Rotating Disk Electrode (RDE)
diffusion coefficient
ferrocene derivative
half-wave potential

Opis:

Through this work we adopted Rotating Disk Electrode (RDE) Voltammetry to study the kinetics of oxidation and the effect of hydrazide group on ferrocene in organic medium. Thus, two different electrodes (Pt and Ge) were used in order to determine this latter. According to the ferrocene taken as a witness the hydrazide group related to the ferrocene made oxidation more difficult. This ferrocenic derivative showed an electrochemical stability, a reversible electrochemical system and an electronic attractor effect of these substitutional ferrocene groups. Finally, we calculated some electrochemical parameters which were: the diffusion coefficients (D), the layer thickness in addition to the electron transfer rate.

Źródło:

International Letters of Chemistry, Physics and Astronomy; 2013, 7, 1; 1-7
2299-3843

Pojawia się w:

International Letters of Chemistry, Physics and Astronomy

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 74.

Tytuł:

Implementacja ułamkowego rachunku różniczkowego do identyfikacji modeli systemów ułamkowych
Implementation of fractional differential calculus to identify models of fractional systems

Autorzy:

Janiczek, T.
Janiczek, J.

Powiązania:

https://bibliotekanauki.pl/articles/156210.pdf

Data publikacji:

2007

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

pochodna ułamkowa
ułamkowy rachunek różniczkowy
identyfikacja
fractional derivative
fractional calculus
identification

Opis:

W artykule omówiono podstawowe pojęcia związane z ułamkowym rachunkiem różniczkowym jak uogólnione definicje całki i pochodnej rzędu ułamkowego oraz właściwości przekształceń z nimi związanych. Pokazano przekształcenia i możliwości wykorzystania ułamkowego rachunku różniczkowego na bazie identyfikacji parametrów przetwornika PVDF i modyfikowanego tlenku bizmutu Bi₂O₃, pozwalające na wyliczenie funkcji oryginalnej.
This paper presents fundamental definitions concerning fractional calculus as generalized definitions of fractional integral and derivative and their properties. It shows transformations and possibilities of using fractional differential equation on a base of identification of parameters of PVDF transducer and of a modified bismuth oxides Bi₂O₃, leading to evaluate the original function.

Źródło:

Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 194-197
0032-4140

Pojawia się w:

Pomiary Automatyka Kontrola

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 75.

Tytuł:

Mathematical modeling of traveling autosolitons in fractional-order activator-inhibitor systems

Autorzy:

Datsko, B.
Gafiychuk, V.

Powiązania:

https://bibliotekanauki.pl/articles/200733.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

fractional derivative
nonlinear dynamics
instability
autosoliton
pochodna ułamkowa
dynamika nieliniowa
niestabilność

Opis:

In the article, basic properties of traveling spatially nonhomogeneous auto-wave solutions in nonlinear fractional-order reactiondiffusion systems are investigated. Such solutions, called autosolitons, arise in a stability region of the system and can coexist with the spatially homogeneous states. By a linear stability analysis and computer simulation, it is shown that the order of the fractional derivative can substantially change the properties of such auto-wave solutions and significantly enrich nonlinear system dynamics. The results of the linear stability analysis are confirmed by computer simulations of the generalized fractional van der Pol-FitzHugh-Nagumo model. A common picture of traveling auto-waves including series in time-fractional two-component activator-inhibitor systems is presented. The results obtained in the article for the distributed system have also been of interest for nonlinear dynamical systems described by fractional ordinary differential equations.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 4; 411-418
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 76.

Tytuł:

A solution to the problem of time-fractional heat conduction in a multi-layer slab

Autorzy:

Siedlecka, U.
Kukla, S.

Powiązania:

https://bibliotekanauki.pl/articles/122925.pdf

Data publikacji:

2015

Wydawca:

Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej

Tematy:

heat conduction
fractional derivative
multi-layer slab
przewodnictwo ciepła
pochodna ułamkowa

Opis:

In this paper a solution of the time-fractional heat conduction problem in a multilayer slab is presented. The boundary conditions of the third kind and the perfect contact at the interfaces are assumed. A space-time dependent volumetric heat source in the slab and time dependent surroundings temperatures are taken into account in the formulation of the problem. The solution is obtained in the form of a series expansion with respect to eigenfunctions of an auxiliary problem. A numerical example shows temperature distribution in the slab for various values of the order of the Caputo fractional derivative in the heat conduction equation.

Źródło:

Journal of Applied Mathematics and Computational Mechanics; 2015, 14, 3; 95-102
2299-9965

Pojawia się w:

Journal of Applied Mathematics and Computational Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 77.

Tytuł:

4,6-Diazido-N-(2,4,6-trinitrophenyl)-1,3,5-triazin-2-amine (TNADAzT) and Its Silver Salt − Synthesis and Characterization

Autorzy:

Musil, T.
Matyáš, R.
Zeman, S.
Růžička, A.
Lyčka, A.
Majzlík, J.
Vala, R.
Knotek, P.

Powiązania:

https://bibliotekanauki.pl/articles/358533.pdf

Data publikacji:

2017

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego

Tematy:

azido derivative of triazine
silver salt
sensitivity
MTX-1
X-ray

Opis:

4,6-Diazido-N-(2,4,6-trinitrophenyl)-1,3,5-triazin-2-amine (TNADAzT) and its silver salt (AgTNADAzT) were prepared and characterized. Elemental analysis, FTIR, NMR, DSC, AAS and X-ray diffraction were used for analytical characterization. The sensitivities of TNADAzT and AgTNADAzT were determined and compared with common explosives and MTX-1. The crystal density of TNADAzT is 1.794 g·cm−3 and its heat of formation 899 kJ·mol−1. The sensitivity of TNADAzT to impact and friction slightly exceeds PETN; the sensitivity to electrostatic discharge is lower than RDX. The sensitivity of AgTNADAzT is on the level of a primary explosives (between mercury fulminate and PETN). The initiation efficiency of AgTNADAzT is higher than 200 mg (acceptor PETN compressed by 64-70 MPa) and therefore excludes it from practical use as a primary explosive in detonators.

Źródło:

Central European Journal of Energetic Materials; 2017, 14, 2; 304-320
1733-7178

Pojawia się w:

Central European Journal of Energetic Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 78.

Tytuł:

Applications of differential calculus in economics. A few simple examples for first-year students

Autorzy:

Biernacki, Marek

Powiązania:

https://bibliotekanauki.pl/articles/421301.pdf

Data publikacji:

2016

Wydawca:

Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu

Tematy:

derivative of function of one variable and two variables
utility
elasticity

Opis:

First-year students usually ask whether they really need mathematics. This paper presents several simple examples applying differential calculus in microeconomics, which allow students to perceive that learning mathematics during their studies of economics does “pay off”.

Źródło:

Didactics of Mathematics; 2016, 13(17); 5-12
1733-7941

Pojawia się w:

Didactics of Mathematics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 79.

Tytuł:

Differentiation of a Fourier series

Autorzy:

Cruz-Santiago, R.
López-Bonilla, J.
López-Vázquez, R.

Powiązania:

https://bibliotekanauki.pl/articles/1177486.pdf

Data publikacji:

2018

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Fejér-Lanczos σ-Factors
Fourier series
Generalized derivative
Least squares method

Opis:

It is very known that if the operator d/dx acts on each term into a convergent Fourier series (FS) then it may result a divergent series. This situation is remedied applying the symmetric derivative to FS, which implies the existence of the important Fejér-Lanczos factors. In this note, we show that the orthogonal derivative also leads to these factors.

Źródło:

World Scientific News; 2018, 102; 188-192
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 80.

Tytuł:

Growth control of cracks under contact conditions based on the topological derivative of the Rice’s integral

Autorzy:

da Silva Xavier, Marcel Duarte
Novotny, Antonio André
Sokołowski, Jan

Powiązania:

https://bibliotekanauki.pl/articles/1839141.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

Rice’s integral
Griffith’s criterion
Eshelby’s tensor
topological derivative

Opis:

In the present paper we propose a simple method for dealing with growth control of cracks under contact type boundary conditions on their lips. The aim is to find a mechanism for decreasing the energy release rate of cracked components, which means increasing their fracture toughness. The method consists in minimizing a shape functional defined in terms of the Rice’s integral, with respect to the nucleation of hard and/or soft inclusions, according to the information provided by the associated topological derivative. Based on Griffith’s energy criterion, this simple strategy allows for an increase in fracture toughness of the cracked component. Since the problem is non-linear, the domain decomposition technique, combined with the Steklov-Poincaré pseudo-differential boundary operator, is used to obtain the sensitivity of the associated shape functional with respect to the nucleation of a small circular inclusion with different material property from the background. Then, the obtained topological derivatives are used to indicate the regions, where the controls should be positioned in order to solve the minimization problem we are dealing with. Finally, a numerical example is presented showing the applicability of the proposed methodology.

Źródło:

Control and Cybernetics; 2019, 48, 2; 307-323
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 81.

Tytuł:

Pharmacological profile of three different gamma-butyrolactone derivatives in mice

Autorzy:

Salat, K.
Librowski, T.
Filipek, B.

Powiązania:

https://bibliotekanauki.pl/articles/3034.pdf

Data publikacji:

2010

Wydawca:

Instytut Medycyny Wsi

Tematy:

pharmacological profile
gamma-butyrolactone derivative
mice
mouse
hot plate
capsaicin
toxicity

Źródło:

Journal of Pre-Clinical and Clinical Research; 2010, 04, 1
1898-2395

Pojawia się w:

Journal of Pre-Clinical and Clinical Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 82.

Tytuł:

Growth of solutions of a class of linear fractional differential equations with polynomial coefficients

Autorzy:

Hamouda, Saada
Mahmoudi, Sofiane

Powiązania:

https://bibliotekanauki.pl/articles/2216191.pdf

Data publikacji:

2022

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

linear fractional differential equations
growth of solutions
Caputo fractional derivative operator

Opis:

This paper is devoted to the study of the growth of solutions of certain class of linear fractional differential equations with polynomial coefficients involving the Caputo fractional derivatives by using the generalized Wiman–Valiron theorem in the fractional calculus.

Źródło:

Opuscula Mathematica; 2022, 42, 3; 415-426
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 83.

Tytuł:

Applying the topological derivative and the boundary element method to design of shape of the heat exchanger

Autorzy:

Freus, K.
Freus, S.

Powiązania:

https://bibliotekanauki.pl/articles/122334.pdf

Data publikacji:

2015

Wydawca:

Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej

Tematy:

topological derivative
topological sensitivity
Laplace equation
boundary element method
heat transfer

Opis:

In this work, the topological derivative for the Laplace equation is used to solve a design problem. This derivative describes the sensitivity of the problem when a small hole is formed at an arbitrary point of the domain. The goal of this work is to design topology of the domain when the Robin condition is imposed on the holes. Physically, the holes can be construed as cooling channels. For finding the solution of the governing equation the boundary element method is applied. The final part of the paper presents the design of the heat exchanger and results of computations.

Źródło:

Journal of Applied Mathematics and Computational Mechanics; 2015, 14, 2; 5-12
2299-9965

Pojawia się w:

Journal of Applied Mathematics and Computational Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 84.

Tytuł:

Denominal Adjectives With Basic Suffixal Formatives in Contemporary Macedonian
Przymiotniki odrzeczownikowe z podstawowymi formantami sufiksalnymi w języku macedońskim

Autorzy:

Stryszewska, Maria

Powiązania:

https://bibliotekanauki.pl/articles/2014900.pdf

Data publikacji:

2021

Wydawca:

Komisja Nauk Filologicznych Polskiej Akademii Nauk, Oddział we Wrocławiu

Tematy:

word-formation
derivative
Macedonian language
relational adjectives
denominal adjectives
suffixal formatives

Opis:

The main subject of the paper are denominal adjectives with chosen formatives in the Macedonian language. Denominal adjectives in Slavonic languages have been described in accordance with various linguistic concepts which differ significantly in their starting point for analysis. Owing to the fact that standard Macedonian was codified only in 1945 and has developed since, there are still many areas that have not been earnestly analysed and described. Denominal adjectives in Macedonian require a complete coverage, which takes into consideration the accomplishment of contemporary Slavic word-formation. Analysis of previous research devoted to Slavic denominal adjectives leads to the conclusion that in the foreground there is contextual significance of the derivatives. As the most adequate model of describing Macedonian relational adjectives, I have chosen the one proposed in Grammar of Contemporary Polish Language. Morphology, which consists of relationships between the derivative and the noun it determines. Most of the denominal adjectives with basic formatives have a general meaning “related to what is named by the base noun”, hence it is possible to specify the meaning of the derivatives only in their contextual use.

Źródło:

Academic Journal of Modern Philology; 2021, 12; 195-205
2299-7164
2353-3218

Pojawia się w:

Academic Journal of Modern Philology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 85.

Tytuł:

Delayed differential detection for absorption spectroscopy recovery

Autorzy:

Cong, Menglong
Sun, Dandan

Powiązania:

https://bibliotekanauki.pl/articles/173211.pdf

Data publikacji:

2019

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

wavelength modulation spectroscopy
WMS
absorption
derivative spectrum
harmonic detection
laser diode

Opis:

An elaborately designed system has been devoted to the recovery of the line shape function of absorption spectrum. Laser power passing through trace gas has been divided into the real-time and delayed components, and their difference, i.e. the equivalent of the first-order derivative spectrum, is recorded and integrated to reconstruct the absorption line profile. Since the real-time and delayed signals are derived from the only gas cell and photodetector, the elimination of background is more effective, relative to the general used double beam detection that involves two gas cells and photodetectors. Compared with the 1st harmonic detection used in the wavelength modulation spectroscopy, here the generation of derivative spectrum is achieved without modulating the injection current of laser. Additionally, the expensive lock-in amplifier working for wavelength modulation spectroscopy is replaced by a homemade device, which is made of an all-pass filter and an instrumentation amplifier. Therefore, the complexity and cost are significantly reduced, and the stability is improved. For the purpose of validation, recovering of the absorption spectroscopy is carried out using a methane sample at its R(3) absorption line of the 2ν₃ overtone, and the obtained data are found to be in a high agreement with theoretical deductions.

Źródło:

Optica Applicata; 2019, 49, 2; 303-315
0078-5466
1899-7015

Pojawia się w:

Optica Applicata

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 86.

Tytuł:

Nonoscillation of damped linear differential equations with a proportional derivative controller and its application to Whittaker-Hill-type and Mathieu-type equations

Autorzy:

Ishibashi, Kazuki

Powiązania:

https://bibliotekanauki.pl/articles/29519191.pdf

Data publikacji:

2023

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

nonoscillation
proportional derivative controller
Riccati technique
Mathieu equation
Whittaker-Hill equation

Opis:

The proportional derivative (PD) controller of a differential operator is commonly referred to as the conformable derivative. In this paper, we derive a nonoscillation theorem for damped linear differential equations with a differential operator using the conformable derivative of control theory. The proof of the nonoscillation theorem utilizes the Riccati inequality corresponding to the equation considered. The provided nonoscillation theorem gives the nonoscillatory condition for a damped Euler-type differential equation with a PD controller. Moreover, the nonoscillation of the equation with a PD controller that can generalize Whittaker-Hill-type equations is also considered in this paper. The Whittaker-Hill-type equation considered in this study also includes the Mathieu-type equation. As a subtopic of this work, we consider the nonoscillation of Mathieu-type equations with a PD controller while making full use of numerical simulations.

Źródło:

Opuscula Mathematica; 2023, 43, 1; 67-79
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 87.

Tytuł:

Applications of Second Order Derivative of Planck Distribution to Cosmic Microwave Background and Melting Point

Autorzy:

Moorthy, C. Ganesa

Powiązania:

https://bibliotekanauki.pl/articles/1065329.pdf

Data publikacji:

2019

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Cosmic Microwave Background
Planck’s Distribution
Second Order Derivative
Wien’s Approximation

Opis:

The second order derivative of Planck distribution for black body radiation has been applied to conclude that minimum temperature of cosmic microwave background can never be less than 1.6 Kelvin. The same derivative has been applied to derive a melting point of all materials naturally to begin to become nonsolid materials, and to derive a limit of temperature for materials naturally to begin to become radioactive materials which radiate.

Źródło:

World Scientific News; 2019, 135; 283-288
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 88.

Tytuł:

Fractional Integral Approximation and Caputo Derivatives with Modification of Trapezoidal Rule

Autorzy:

Pandiangan, Naomi
Johar, Dwindi
Purwani, Sri

Powiązania:

https://bibliotekanauki.pl/articles/1193326.pdf

Data publikacji:

2021

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Caputo fractional derivative
Fractional integral
Modified trapezoidal rule
Rieman Liouville fractional integral

Opis:

In classical calculus, a function can be derived or integrated as many as natural numbers. Then a question arises regarding the fractional order of derivatives and integrals. There is a development of classical calculus called fractional calculus. Fractional calculus may be a department of science that amplifies the orders of derivatives and integrals into the order of rational numbers or even real numbers. The difficulty of finding solutions analytically for a complicated function of fractional integrals or fractional derivatives often occurs. In this paper, we will solve Rieman Liouville's fractional integral and Caputo's fractional derivative analytically using the trapezoidal rule modification method. Trapezoidal method is an approximation method that is resulted from the linear interpolation function. In this paper, we will find numerical simulations with modified trapezoidal method, to estimate some functions, and the results will be compared with previous research related to the Rieman Liouville fractional integral approximation and the Caputo fractional derivative. The result from simulation find that modified trapezoidal can approximate Caputo fractional derivative by replace α with -α and Quadratic schemes method is the best method to approximate Rieman Liouville fractional integral and Caputo fractional derivative.

Źródło:

World Scientific News; 2021, 153, 2; 169-180
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 89.

Tytuł:

Connectivity of diagonal products of Baire one functions

Autorzy:

Maliszewski, Aleksander

Powiązania:

https://bibliotekanauki.pl/articles/1208439.pdf

Data publikacji:

1994

Wydawca:

Polska Akademia Nauk. Instytut Matematyczny PAN

Tematy:

Darboux function
peripheral continuity
approximate continuity
derivative
Baire one function
diagonal product

Opis:

We characterize those Baire one functions f for which the diagonal product x → (f(x), g(x)) has a connected graph whenever g is approximately continuous or is a derivative.

Źródło:

Fundamenta Mathematicae; 1994-1995, 146, 1; 21-29
0016-2736

Pojawia się w:

Fundamenta Mathematicae

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 90.

Tytuł:

No effect of3-(N-p-isopropoxyphenylsuccinimidomethylamino)-cinnamic acid on anticonvulsant action of different classical antiepileptic drugs in mouse maximal electroshock-induced seizure model

Autorzy:

Luszczycki, J. J.
Marczewski, T.
Marzeda, E.
Durmowicz, D.
Podgorska, D.
Kocharov, S. L.
Florek-Luszczki, M.

Powiązania:

https://bibliotekanauki.pl/articles/972739.pdf

Data publikacji:

2012

Wydawca:

Instytut Medycyny Wsi

Tematy:

antiepileptic drugs
maximal electroshock-induced seizures
pharmacokinetic/pharmacodynamic interaction
p-isopropoxyphenylsuccinimide derivative

Opis:

Introduction and objective: The aim of the study was to determine the effects of 3-(N-p-isopropoxyphenylsuccinimidomethylamino)-cinnamic acid (IPPSMA-CA – a new succinimide derivative) on the protective action of 4 classical antiepileptic drugs (AEDs): carbamazepine [CBZ], phenobarbital [PB], phenytoin [PHT] and valproate [VPA]), against maximal electroshock (MES)-induced tonic seizures in mice. Materials and methods: Tonic hind limb extension (seizure activity) was evoked in adult male albino Swiss mice by a current (sine-wave, 25 mA, 500 V, 50 Hz, 0.2 s stimulus duration) delivered via auricular electrodes. Acute adverse-effectprofiles of the combination of IPPSMA-CA and 4 classical AEDs (CBZ, PB, PHT and VPA) with respect to motor performance, long-term memory and skeletal muscular strength were measured in the chimney, passive avoidance and grip-strength tests, respectively. Results: IPPSMA-CA administered at 150 mg/kg (i.p.) significantly elevated the threshold for electroconvulsions in mice (p<0.01). IPPSMA-CA at doses of 50 and 100 mg/kg, however, had no significant impact on the threshold for electroconvulsions in mice. Nor did IPPSMA-CA (100 mg/kg) significantly affect the anticonvulsant activity of CBZ, PB, PHT and VPA in the MES test in mice. None of the examined combinations of IPPSMA-CA (100 mg/kg, i.p.) with CBZ, PB, PHT and VPA (at their ED50 values from the MES-induced seizure test) affected motor coordination in the chimney test, long-term memory in the passive avoidance task, and muscular strength in the grip-strength test in mice. This indicates no possible acute adverse effects in animals. Conclusions: IPPSMA-CA elevated the threshold for electroconvulsions in mice in a dose-dependent manner. However, IPPSMA-CA at a sub-protective dose of 100 mg/kg did not affect the anticonvulsant action of various classical AEDs in the mouse MES model. Thus, the combinations of IPPSMA-CA with CBZ, PB, PHT and VPA are neutral from a preclinical viewpoint.

Źródło:

Journal of Pre-Clinical and Clinical Research; 2012, 06, 1; 20-24
1898-2395

Pojawia się w:

Journal of Pre-Clinical and Clinical Research

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 91.

Tytuł:

The "Second Derivative" of a Non-Differentiable Function and its Use in Interval Optimization Methods

Autorzy:

Kubica, B. J.

Powiązania:

https://bibliotekanauki.pl/articles/308398.pdf

Data publikacji:

2011

Wydawca:

Instytut Łączności - Państwowy Instytut Badawczy

Tematy:

Dirac delta
distributions
generalized derivative
interval computations
interval Newton method
nondifferentiable optimization

Opis:

The paper presents an idea to use weak derivatives in interval global optimization. It allows using the Newton operator to narrow domains of non-differentiable functions. Preliminary computational experiments are also presented.

Źródło:

Journal of Telecommunications and Information Technology; 2011, 4; 81-85
1509-4553
1899-8852

Pojawia się w:

Journal of Telecommunications and Information Technology

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 92.

Tytuł:

Optimal control of a fractional-order enzyme kinetic model

Autorzy:

Al-Basir, F.
Elaiw, A. M.
Kesh, D.
Roy, P. K.

Powiązania:

https://bibliotekanauki.pl/articles/206336.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Instytut Badań Systemowych PAN

Tematy:

enzyme kinetics
cooperative phenomenon
fractional derivative
mathematical modeling
Hamiltonian
optimal control problem

Opis:

Enzymes play a significant role in controlling the characteristics of various chemical and biochemical reactions. They act as catalysts that increase the rate of reaction without undergoing any change in quantity. Enzymatic reactions occur through the active sites, which combine with the substrates to form intermediate complexes, subsequently leading to products. An enzyme having two active sites can show cooperative phenomena. Against this background, an enzyme-kinetic mathematical model is formulated using fractional order derivatives. Optimal control mechanism has been incorporated into the fractional-order model system to maximize the product output. Euler-Lagrange optimality conditions are derived for the FOCP (fractional order control problem) using maximum principle. Numerical iterative schemes have been developed to solve the fractional order optimal control problem through Matlab.

Źródło:

Control and Cybernetics; 2015, 44, 4; 443-461
0324-8569

Pojawia się w:

Control and Cybernetics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 93.

Tytuł:

Próba subpikselowej lokalizacji linii konturowych z wykorzystaniem drugiej pochodnej obrazu cyfrowego

Autorzy:

Jachimski, J.
Mikrut, S.

Powiązania:

https://bibliotekanauki.pl/articles/130022.pdf

Data publikacji:

1998

Wydawca:

Stowarzyszenie Geodetów Polskich

Tematy:

obraz cyfrowy
druga pochodna
linia konturowa
digital image
second derivative
contour line

Źródło:

Archiwum Fotogrametrii, Kartografii i Teledetekcji; 1998, 8; 25-1-25-8
2083-2214
2391-9477

Pojawia się w:

Archiwum Fotogrametrii, Kartografii i Teledetekcji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 94.

Tytuł:

Numerical solutions to boundary value problem for anomalous diffusion equation with Riesz-Feller fractional operator
Numeryczne rozwiązanie zagadnienia brzegowego równania anomalnej dyfuzji z operatorem frakcjalnym Riesza-Fellera

Autorzy:

Ciesielski, M.
Leszczyński, J.

Powiązania:

https://bibliotekanauki.pl/articles/280627.pdf

Data publikacji:

2006

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

Riesz-Feller fractional derivative
boundary value problem
Dirichlet conditions
finite difference method

Opis:

In this paper, we present a numerical solution to an ordinary differential equation of a fractional order in one-dimensional space. The solution to this equation can describe a steady state of the process of anomalous diffusion. The process arises from interactions within complex and non-homogeneous background. We present a numerical method which is based on the finite differences method. We consider a boundary value problem (Dirichlet conditions) for an equation with the Riesz-Feller fractional derivative. In the final part of this paper, some simulation results are shown. We present an example of non-linear temperature profiles in nanotubes which can be approximated by a solution to the fractional differential equation.
W pracy zaprezentowano numeryczne rozwiązanie jednowymiarowego równania różniczkowego zwyczajnego niecałkowitego rzędu. Rozwiązanie tego równania może opisywać stan ustalony procesu anomalnej dyfuzji. Proces ten wynika z oddziaływań zachodzących w złożonych i niejednorodnych systemach. Zaprezentowana metoda numeryczna oparta jest na metodzie różnic skończonych. Rozważane było zagadnieriie brzegowe z warunkami Dirichleta dla tego równania z pochodną frakcjalną RieszaFellera. W końcowej części przedstawiono wyniki symulacji. Jako przykład zaprezentowano nieliniowy profil temperatury w nanorurkach, który może być przybliżony przez rozwiązanie frakcjalnego równania różniczkowego.

Źródło:

Journal of Theoretical and Applied Mechanics; 2006, 44, 2; 393-403
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 95.

Tytuł:

Wykorzystywanie metod spektroskopowych w oznaczaniu aktywności mikroorganizmów

Autorzy:

Kaczorek, E.
Olszanowski, A.

Powiązania:

https://bibliotekanauki.pl/articles/274375.pdf

Data publikacji:

2010

Wydawca:

Roble

Tematy:

mikroorganizmy
metody spektoskopowe
biodegradacja substancji ropopochodnych
microorganisms
spectroscopis methods
biodegradation
petroleum derivative

Źródło:

LAB Laboratoria, Aparatura, Badania; 2010, 15, 5; 6-16
1427-5619

Pojawia się w:

LAB Laboratoria, Aparatura, Badania

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 96.

Tytuł:

Limit-point criteria for the matrix Sturm-Liouville operator and its powers

Autorzy:

Braeutigam, I. N.

Powiązania:

https://bibliotekanauki.pl/articles/255833.pdf

Data publikacji:

2017

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

quasi-derivative
quasi-differential operator
matrix Sturm-Liouville operator
deficiency numbers
distributions

Opis:

We consider matrix Sturm-Liouville operators generated by the formal expression [formula] in the space [formula]. Let the matrix functions P := P(x), Q := Q(x) and R := R(x) of order n (n ∈ N) be defined on I, P is a nondegenerate matrix, P and Q are Hermitian matrices for x ∈ I and the entries of the matrix functions[formula], Q and R are measurable on I and integrable on each of its closed finite subintervals. The main purpose of this paper is to find conditions on the matrices P, Q and R that ensure the realization of the limit-point case for the minimal closed symmetric operator generated by [formula]. In particular, we obtain limit-point conditions for Sturm-Liouville operators with matrix-valued distributional coefficients.

Źródło:

Opuscula Mathematica; 2017, 37, 1; 5-19
1232-9274
2300-6919

Pojawia się w:

Opuscula Mathematica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 97.

Tytuł:

Design of a Predictive PID Controller Using Particle Swarm Optimization

Autorzy:

Mustafa, Norhaida
Hashim, Fazida Hanim

Powiązania:

https://bibliotekanauki.pl/articles/1844451.pdf

Data publikacji:

2020

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

proportional integral derivative controller
particle swarm optimization (PSO) algorithm
optimization
predictive PID

Opis:

The proportional-integral-derivative (PID) controller is widely used in various industrial applications such as process control, motor drives, magnetic and optical memory, automotive, flight control and instrumentation. PID tuning refers to the generation of PID parameters (Kp, Ki, Kd) to obtain the optimum fitness value for any system. The determination of the PID parameters is essential for any system that relies on it to function in a stable mode. This paper proposes a method in designing a predictive PID controller system using particle swarm optimization (PSO) algorithm for direct current (DC) motor application. Extensive numerical simulations have been done using the Mathwork’s Matlab simulation environment. In order to gain full benefits from the PSO algorithm, the PSO parameters such as inertia weight, iteration number, acceleration constant and particle number need to be carefully adjusted and determined. Therefore, the first investigation of this study is to present a comparative analysis between two important PSO parameters; inertia weight and number of iteration, to assist the predictive PID controller design. Simulation results show that inertia weight of 0.9 and iteration number 100 provide a good fitness achievement with low overshoot and fast rise and settling time. Next, a comparison between the performance of the DC motor with PID-PSO, with PID of gain 1, and without PID were also discussed. From the analysis, it can be concluded that by tuning the PID parameters using PSO method, the best gain in performance may be found. Finally, when comparing between the PID-PSO and its counterpart, the PI-PSO, the PID-PSO controller gives better performance in terms of robustness, low overshoot (0.005%), low minimum rise time (0.2806 seconds) and low settling time (0.4326 seconds).

Źródło:

International Journal of Electronics and Telecommunications; 2020, 66, 4; 737-743
2300-1933

Pojawia się w:

International Journal of Electronics and Telecommunications

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 98.

Tytuł:

Stabilization of autonomous linear time invariant fractional order derivative switched systems with different derivative in subsystems

Autorzy:

Balochian, S.

Powiązania:

https://bibliotekanauki.pl/articles/200478.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

linear time invariant fractional order derivative
switching systems
linear matrix inequality
LMI

Opis:

In this paper, the stabilization problem of a autonomous linear time invariant fractional order (LTI-FO) switched system with different derivative order in subsystems is outlined. First, necessary and sufficient condition for stability of an LTI-FO switched system with different derivative order in subsystems based on the convex analysis and linear matrix inequality (LMI) for two subsystems is presented and proved. Also, sufficient condition for stability of an LTI-FO switched system with different derivative order in subsystems for more than two subsystems is proved. Then a sliding sector is designed for each subsystem of the LTI-FO switched system. Finally, a switching control law is designed to switch the LTI-FO switched system among subsystems to ensure the decrease of the norm of the switched system. Simulation results are given to show the effectiveness of the proposed variable structure controller.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 3; 495-503
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 99.

Tytuł:

On optimal control problem subject to fractional order discrete time singular systems

Autorzy:

Chiranjeevi, Tirumalasetty
Biswas, Raj Kumar
Devarapalli, Ramesh
Babu, Naladi Ram
García Márquez, Fausto Pedro

Powiązania:

https://bibliotekanauki.pl/articles/2083465.pdf

Data publikacji:

2021

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

fractional optimal control problem
discrete time singular system
fractional derivative
Hamiltonian technique

Opis:

In this work, we present optimal control formulation and numerical algorithm for fractional order discrete time singular system (DTSS) for fixed terminal state and fixed terminal time endpoint condition. The performance index (PI) is in quadratic form, and the system dynamics is in the sense of Riemann-Liouville fractional derivative (RLFD). A coordinate transformation is used to convert the fractional-order DTSS into its equivalent non-singular form, and then the optimal control problem (OCP) is formulated. The Hamiltonian technique is used to derive the necessary conditions. A solution algorithm is presented for solving the OCP. To validate the formulation and the solution algorithm, an example for fixed terminal state and fixed terminal time case is presented.

Źródło:

Archives of Control Sciences; 2021, 31, 4; 849-863
1230-2384

Pojawia się w:

Archives of Control Sciences

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 100.

Tytuł:

Functional-technological properties of meat-and-vegetable emulsions with the addition of chitosan derivatives

Autorzy:

Shestopalova, Irina Anatolyevna
Kolodyaznaya, Valentina Stepanovna
Kiprushkina, Elena Ivanovna
Kuprina, Elena Eduardovna
Petrova, Valentina Aleksandrovna
Rogozina, Elena Andreevna
Danko, Veronika Olegovna

Powiązania:

https://bibliotekanauki.pl/articles/1034377.pdf

Data publikacji:

2018

Wydawca:

Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe

Tematy:

chitosan derivative
functional-technological properties
meat-and-vegetable emulsion
micronising
rheological properties

Opis:

This article provides data on the analysis of the properties of chitosan derivatives as a functional ingredient used in food technologies as a structure-forming agent, immunomodulator, enterosorbent of xantobiotics, anti-sclerotic and anti-arthritic factor, and as a regulator of the acidity of gastric juice. The expediency of the use of N-methylallyl-chitosan (chitosan derivative) as a substance that improves the functional-technological (moisture and fat-retaining power) and rheological properties of meat-and-vegetable emulsions is shown. The modes of micronising the emulsion depending on the chitosan derivative mass concentration, the speed of rotation of the knives of the microniser and the processing time were studied. Dependences on the change of moisture and fat-retaining power (MRP, FRP) and effective viscosity (η) on the above-mentioned parameters were investigated. The parameters of micronising were validated: the speed of rotation of the knives (υ) was 2500 rpm, the processing time (τ) was 60 s, υ was 3000 rpm, and τ was 50 s; also, the mass fraction of chitosan derivatives was 0.06%, which ensures the production of meat-and-vegetable emulsions of high quality.

Źródło:

Progress on Chemistry and Application of Chitin and its Derivatives; 2018, 23; 170-178
1896-5644

Pojawia się w:

Progress on Chemistry and Application of Chitin and its Derivatives

Dostawca treści:

Biblioteka Nauki

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