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Wyświetlanie 1-15 z 541
Tytuł:
Cone solutions of multi-order fractional difference systems
Autorzy:
Girejko, E.
Mozyrska, D.
Powiązania:
https://bibliotekanauki.pl/articles/206510.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
fractional difference operator
fractional difference equation
cone solutions
Opis:
The fractional difference system of equations with different fractional orders is considered. We obtain the existence and uniqueness results for the initial value problem. Cone solutions are presented. An example is given to illustrate the results.
Źródło:
Control and Cybernetics; 2013, 42, 2; 419-429
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On oscillatory solutions of certain difference equations
Autorzy:
Grzegorczyk, G.
Werbowski, J.
Powiązania:
https://bibliotekanauki.pl/articles/255794.pdf
Data publikacji:
2006
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
difference equations
oscillation
Opis:
Some difference equations with deviating arguments are discussed in the context of the oscillation problem. The aim of this paper is to present the sufficient conditions for oscillation of solutions of the equations discussed.
Źródło:
Opuscula Mathematica; 2006, 26, 2; 317-326
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On asymptotic expansions of global errors
Autorzy:
Pfeifer, Eckhard
Powiązania:
https://bibliotekanauki.pl/articles/747786.pdf
Data publikacji:
1990
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
Finite difference methods
Opis:
.
We consider a linear partial differential equation with constant coefficients and the corresponding difference equation. Conditions are given under which the error possesses an asymptotic expansion with respect to h. These results are applied to obtain asymptotic expansions of some quadratures and of the approximate solution of a boundary value problem for a second order differential equation.
Źródło:
Mathematica Applicanda; 1990, 18, 32
1730-2668
2299-4009
Pojawia się w:
Mathematica Applicanda
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cross-national sanctions and green innovation: Worldwide investigation
Autorzy:
Fu, Qiang
Chang, Chun-Ping
Powiązania:
https://bibliotekanauki.pl/articles/39993687.pdf
Data publikacji:
2024
Wydawca:
Instytut Badań Gospodarczych
Tematy:
difference-in-difference model
green innovation
cross-national sanction
Opis:
Research background: Cross-national sanctions are external factors with high uncertainty. The current situation of green innovation is not optimistic and the future of the uncertain development is worth exploring. Purpose of the article: This study intends to investigate how cross-national sanctions affect green innovations by examining data from 130 countries from 1990 to 2020. We use six different forms of sanctions (including those from the U.S., EU, UN, as well as unilateral, plurilateral, and economic sanctions) as the primary explanatory variables, with environmental management innovations serving as a proxy for green innovations. Methods: Difference-in-Difference (DID) technique; Logit model. Findings & value added: The number of environmental management inventions produced by a nation's inventors is negatively affected by plurilateral and economic sanctions, as well as by the US and the EU sanctions, while other types of sanctions have weaker effects. In terms of sub-indicators, plurilateral and the US sanctions have a serious negative impact on air pollution control and water pollution control inventions, while plurilateral, The EU and economic sanctions have a negative impact on waste management innovations. However, unilateral and the UN sanctions have no apparent effect on any type of environmental technology. Further logit model tests show that the US and economic sanctions lead to a decrease in green innovations. Moreover, the difference between Asian and African countries is that the negative effects of plurilateral, the U.S., the EU, and economic sanctions are more obvious in African countries, while cross-national sanctions have no significant impact on Asian countries. The results of our study should help countries under sanctions to respond more effectively to environmental progress.
Źródło:
Oeconomia Copernicana; 2024, 15, 2; 435-469
2083-1277
Pojawia się w:
Oeconomia Copernicana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Edge Reduced Skolem Difference Mean Number of Some Graphs
Autorzy:
Murugan, K.
Powiązania:
https://bibliotekanauki.pl/articles/1192710.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Skolem difference mean graph
edge reduced skolem difference mean number
skolem difference mean labeling
some graphs
Opis:
A graph G =(V,E) with p vertices and q edges is said to have skolem difference mean labeling if it is possible to label the vertices x ϵ V with distinct elements f (x) from {1,2,3,…,p+q} in such a way that the edge e =uv is labeled with |f(u)-f(v)|/2 if |f(u)-f(v)| is even and (|f(u)-f(v)|+1)/2 if |f(u)-f(v)| is odd and the resulting labels of the edges are distinct and are from {1,2,3,…,q}. A graph that admits skolem difference mean labeling is called a skolem difference mean graph. In this paper, the author studied the edge reduced skolem difference mean number of some graphs.
Źródło:
World Scientific News; 2016, 30; 129-142
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the nonoscillatory behavior of solutions of three classes of fractional difference equations
Autorzy:
Grace, Said Rezk
Alzabut, Jehad
Punitha, Sakthivel
Muthulakshmi, Velu
Adiguzel, Hakan
Powiązania:
https://bibliotekanauki.pl/articles/255333.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Caputo difference operator
nonoscillation criteria
fractional difference equation mathematical inequalities
Opis:
In this paper, we study the nonoscillatory behavior of three classes of fractional difference equations. The investigations are presented in three different folds. Unlike most existing nonoscillation results which have been established by employing Riccati transfor mation technique, we employ herein an easily verifiable approach based on the fractional Taylor’s difference formula, some features of discrete fractional calculus and mathematical inequalities. The theoretical findings are demonstrated by examples. We end the paper by a concluding remark.
Źródło:
Opuscula Mathematica; 2020, 40, 5; 549-568
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Conditions for asymptotic stability of first order scalar differential-difference equation with complex coefficients
Autorzy:
Kapica, Rafał
Zawiski, Radosław
Powiązania:
https://bibliotekanauki.pl/articles/27314669.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
first order differential-difference equation with complex coefficients
stability of differential-difference equation
characteristic exponential polynomial of differential-difference equation
retarded differential-difference equation
DDE
Opis:
We investigate a scalar characteristic exponential polynomial with complex coefficients associated with a first order scalar differential-difference equation. Our analysis provides necessary and sufficient conditions for allocation of the roots in the complex open left half-plane what guarantees asymptotic stability of the differential-difference equation. The conditions are expressed explicitly in terms of complex coefficients of the characteristic exponential polynomial, what makes them easy to use in applications. We show examples including those for retarded PDEs in an abstract formulation.
Źródło:
Archives of Control Sciences; 2023, 33, 3; 607--629
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Różnica, która boli. Fenomenologiczny aspekt nierówności społecznych w kontekście procesów tożsamościowych
Autorzy:
Leszniewski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2045777.pdf
Data publikacji:
2015-03-31
Wydawca:
Wydawnictwo Adam Marszałek
Tematy:
difference
exclusion
identity
individuality
Opis:
The article presents problem of social difference and the related mechanisms of exclusion. The paper shows the process how the difference needed in the world is born inequality, discrimination, human suffering, often as unwanted and unintended consequences of group processes. The factor differentiating way to experience the social difference and forms of engagement in reality, is the human identity. The text presents the arguments in favor of the thesis that the difference does not necessarily lead to inequality, and a key role in this process is the identity of the man, with his basic need of recognition. Educational activities are considered an important factor in institutional support in this process. Also shows the process of individualization (the problem of individualism) in the social world as an essential factor in the offending unfavorable balance between an inclusion and social exclusion.
Źródło:
Kultura i Edukacja; 2015, 1(107); 34-53
1230-266X
Pojawia się w:
Kultura i Edukacja
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inclusion, integration, assimilation. Conceptions of incorporation of Others and definition of “freedom” in contemporary philosophy and political thought of modern liberal democracies: considerations of philosophers and cultural representations
Autorzy:
Pichnicka, Patrycja
Powiązania:
https://bibliotekanauki.pl/articles/531337.pdf
Data publikacji:
2019
Wydawca:
Fundacja Instytut Nauki o Polityce
Tematy:
Assimilation
Difference-neutral
Difference-specific
Distinctiveness
Equality
Freedom
Individualism
Integration
Queer
Opis:
Equality and freedom are the foundations of liberal democracy and the Western society. However, they can be differently defined, and their definition implicates the different conditions and shaping of both culture and society. The main line of distinction is the orientation of definitions of both equality and freedom: they can be individual-oriented or group-oriented. The philosophical dilemma about what is true freedom and true equality is also a practical problem: which definition should be applied in today’s social politics and how to integrate individuals and groups into a single multicultural postmodern society. I shall demonstrate the main conceptions and potential consequences of their application. Then I shall analyse cultural representations of those conceptions. Such representations not only reflect but also influence popular thinking. Finally, I shall try to draw some conclusions regarding the implementation of different social conceptions.
Źródło:
Polish Journal of Political Science; 2019, 5, 2; 61-85
2391-3991
Pojawia się w:
Polish Journal of Political Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podobny w inności i inny w podobieństwie – rzecz o spotkaniu innego w ujęciu Józefa Tischnera
Similar in otherness and other in similarity: Józef Tischner on the encounter with the other
Autorzy:
Mizdrak, Inga
Powiązania:
https://bibliotekanauki.pl/articles/920174.pdf
Data publikacji:
2014-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
other
experience
relation
difference
Opis:
Otherness is encountered, noticed and, as the case may be, analyzed in a relation, because it is in a relation that the identity of I and the identity of You is revealed, and our identity is basically rooted in the individual constitution of a specific I and a specific You. The aim of the present study is to probe the phenomenon of otherness (alterity), and through it the fundamental question of who is the other we encounter, and next to show the main ways of experiencing the encounter with the other, whichalways occurs in the sphere of good and evil. In Józef Tischner’s view the experience of the other is a fundamental one, in that it reveals much of our own self-experience. My encounter with the other also throws into relief myself as the other and the fact that his otherness is different from mine. In the beginning of this discovery of otherness, the gap between I and You appears to be unbridgeable. But Tischner believes that the sensation of separateness and even of “being alien” assumes a kind of similarity,with the proviso that the latter occurs on the plane of our mutual being foreach other. Tischner stresses otherness in similarity and similarity in otherness, both constituted and coexistent in the relation between I and You. Tischner’s idea involves a paradox: to open oneself to the alterity of the other, we have in a way to “bear” our own otherness and thereby to come to be “for the other”.
Źródło:
Interdyscyplinarne Konteksty Pedagogiki Specjalnej; 2014, 7; 57-71
2300-391X
Pojawia się w:
Interdyscyplinarne Konteksty Pedagogiki Specjalnej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Relationship between gender role conflict and attitude towards seeking professional psychological help
Autorzy:
Loganathan, Nirooj
Foo, Fatt Mee
Powiązania:
https://bibliotekanauki.pl/articles/2129763.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gender role conflict
attitude towards psychological help-seeking
gender difference
ethnic difference
Opis:
This study examined the relationship between gender role conflict and attitude towards psychological help-seeking. This study involved 120 university students from a university. Gender Role Conflict Scale was used to measure gender role conflict and Attitude towards Seeking Professional Psychological Help Scale-Short Form was used to measure attitude towards psychological help-seeking. The results found there is a significant negative relationship between gender role conflict and attitude towards seeking psychological help. The results suggest that it is essential for mental health professionals to recognise the impact of gender roles on the counselling process.
Źródło:
Polish Psychological Bulletin; 2019, 50, 4; 352-356
0079-2993
Pojawia się w:
Polish Psychological Bulletin
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Full-order observers for linear fractional multi-order difference systems
Autorzy:
Wyrwas, M.
Powiązania:
https://bibliotekanauki.pl/articles/199928.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
difference operators
fractional order difference system
observer
operator różniczkowy
obserwator
system różniczkowy
Opis:
The paper is devoted to the construction of observers for linear fractional multi–order difference systems with Riemann–Liouville– and Grünwald–Letnikov–type operators. Basing on the Z-transform method the sufficient condition for the existence of the presented observers is established. The behaviour of the constructed observer is demonstrated in numerical examples.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2017, 65, 6; 891-989
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fractional-order discrete model of an independent wheel electrical drive of the autonomous platform
Autorzy:
Bąkała, M.
Nowakowski, J.
Ostalczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/200875.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fractional-order backward difference
difference equation
identification
model dyskretny
równanie różniczkowe
identyfikacja
Opis:
In the paper the linear time-invariant fractional-order models of the separated wheel closed-loop electrical drive of the autonomous platform are considered. As a reference model one considers the classical model described by the second-order linear difference equation. Two discrete-time fractional-order models are considered: non-commensurate and commensurate. According to the sum of the squared error criterion (SSE) one compares two-parameter integer-order model with the four-parameter non-commensurate and three-parameter commensurate fractional-order ones. Three mathematical models are built and simulated. The computer simulation results are compared with measured velocity of the real autonomous platform separate wheel closed-loop electrical drive.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 4; 433-440
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extra Skolem Difference Mean Labeling of Some Graphs
Autorzy:
Sundari, G. Muppidathi
Murugan, K.
Powiązania:
https://bibliotekanauki.pl/articles/1030829.pdf
Data publikacji:
2020
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
F-tree
Skolem difference mean labeling
Y-tree
extra skolem difference mean labeling
Opis:
A graph G =(V,E) with p vertices and q edges is said to have skolem difference mean labeling if it is possible to label the vertices x ϵ V with distinct elements f (x) from the set {1,2…p+q} in such a way that the edge e =uv is labeled with |f(u)-f(v)|/2 if |f(u)-f(v)| is even and (|f(u)-f(v)|+1)/2 if |f(u)-f(v)| is odd and the resulting labels of the edges are distinct and are from {1,2…q}. A graph that admits skolem difference mean labeling is called a skolem difference mean graph. If one of the skolem difference mean labeling of G satisfies the condition that all the labels of the vertices are odd, then we call this skolem difference mean labeling an extra skolem difference mean labeling and call the graph G an extra skolem difference mean graph. In this paper, extra skolem difference mean labeling of some graphs are studied.
Źródło:
World Scientific News; 2020, 145; 210-221
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On asymptotic stability of a linear difference equation depending on parameters
Autorzy:
Przyłuski, M.
Powiązania:
https://bibliotekanauki.pl/articles/115517.pdf
Data publikacji:
2012
Wydawca:
Fundacja na Rzecz Młodych Naukowców
Tematy:
difference equation
asymptotic stability
optimisation
Opis:
The paper focuses on a linear diffrence equation depending on parameters. The equation is related to Good win’s theory of extrapolative expectations. The stability region of the equation is investigated. Conditions for asymptotic stability are formulated and presented as an optimisation problem, which is further analysed. Despite employing state-of-the-art solvers, numerical results have turned out to be too ambiguous to provide the basis for definite conclusions about the investigated stability region.
Źródło:
Challenges of Modern Technology; 2012, 3, 3; 11-14
2082-2863
2353-4419
Pojawia się w:
Challenges of Modern Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 541

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