Temat: derivative - Katalog OPAC zbiorów

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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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