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Wyświetlanie 1-15 z 602
Tytuł:
Modes of \((\alpha)\)-convergence of sequences of functions
Autorzy:
Athanassiadou, E.
Boccuto, A.
Papanastassiou, N.
Powiązania:
https://bibliotekanauki.pl/articles/746661.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Matematyczne
Tematy:
sympathetic convergence, fine convergence, sympathetic-\(\alpha\)-convergence, fine-\(\alpha\)-convergence
Opis:
In this paper we deal with continuous convergence and some related properties of sequences of functions. We present some conditions to get uniform convergence of the sequence involved to a constant function. As an application, we give a result on equivalence between modes of convergence.
Źródło:
Commentationes Mathematicae; 2013, 53, 1
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local convergence of a multi-step high order method with divided differences under hypotheses on the first derivative
Autorzy:
Argyros, Ioannis K.
George, Santhosh
Powiązania:
https://bibliotekanauki.pl/articles/744644.pdf
Data publikacji:
2017-12-01
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
Multi-step method
restricted convergence domain
radius of convergence
local convergence
Opis:
This paper is devoted to the study of a multi-step method with divided differences for solving nonlinear equations in Banach spaces. In earlier studies, hypotheses on the Fréchet derivative up to the sixth order of the operator under consideration is used to prove the convergence of the method. That restricts the applicability of the method. In this paper we extended the applicability of the sixth-order multi-step method by using only hypotheses on the first derivative of the operator involved. Our convergence conditions are weaker than the conditions used in earlier studies. Numerical examples where earlier results cannot be applied to solve equations but our results can be applied are also given in this study.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica; 2017, 16
2300-133X
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
THE CONVERGENCE OF THE ECONOMIC SIZE OF FARMS IN POLAND – THE ECONOMETRIC ANALYSIS
Autorzy:
Muszyńska, Joanna
Müller-Frączek, Iwona
Powiązania:
https://bibliotekanauki.pl/articles/453894.pdf
Data publikacji:
2014
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Katedra Ekonometrii i Statystyki
Tematy:
agricultural development
economic size of the farm
b convergence
σ-convergence
γ-convergence
Opis:
The research discussed in the article concerned the level of development of agriculture in Poland. The main aim of the study was to verify the hypothesis of convergence of the economic size of farms. The analysis confirmed the existence of -convergence, however, showed no occurrence of σ-convergence and γ-convergence. Based on the results of the analysis of marginal vertical -convergence, Poland was divided into two clubs with different paths of development. In one of them the process of convergence was confirmed, but in the second one the phenomenon of divergence was revealed.
Źródło:
Metody Ilościowe w Badaniach Ekonomicznych; 2014, 15, 2; 157-166
2082-792X
Pojawia się w:
Metody Ilościowe w Badaniach Ekonomicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Konwergencja gospodarcza na poziomie regionalnym w wybranych grupach państw Unii Europejskiej w latach 2000-2014
Economic convergence in selected groups of the European Union’s member states during the period of 2000-2014
Autorzy:
Tylec, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/587930.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Konwergencja gospodarcza
Konwergencja typu beta
Konwergencja typu sigma
Beta-convergence
Economic convergence
Sigma-convergence
Opis:
W opracowaniu podjęto interesującą poznawczo problematykę konwergencji gospodarczej. Wyznaczono cel i określono tezę. Zdefiniowano pojęcie konwergencji gospodarczej i zaznaczono jej związek z polityką spójności. Następnie omówiono dwie metody jej badania: konwergencję typu beta oraz sigma. Przeprowadzono analizę empiryczną w zakresie poziomu PKB per capita na poziomie regionalnym NUTS2 w wybranych grupach krajów. Dodatkowo przedstawiono rozbieżności w poziomie PKB per capita w ramach wybranych krajów Europy Środkowo-Wschodniej. Całość opracowania zakończono podsumowaniem.
In the study problems of economic convergence was taken. The goal and the thesis was determined. The concept of economic convergence was defined, and its relationship with cohesion policy was underlined. Further, two methods of research were discussed: beta- and sigma-convergence. Empirical analysis in terms of GDP per capita at regional level NUTS 2 in selected groups of countries was conducted. In addition, the differences in the level of GDP per capita in selected countries in Central and Eastern Europe was presented. The whole study was completed by a summary.
Źródło:
Studia Ekonomiczne; 2017, 319; 259-267
2083-8611
Pojawia się w:
Studia Ekonomiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Parallel regional convergence in Poland before and after EU accession
Autorzy:
Wójcik, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/1069019.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Warszawski. Wydział Geografii i Studiów Regionalnych
Tematy:
Regional convergence
EU accession
parallel convergence
sigma
Polska
Opis:
The purpose of the study is to analyze the dynamics of regional disparities on NUTS 2 level in Poland for the period 1990–2017 within the framework of sigma convergence. We focus in particular on comparing the patterns of regional convergence before and after EU accession, introducing the methodology of parallel sigma convergence. The results show that the Mazowieckie voivodeship grew much above the average in both the pre-and post-accession periods, while eastern regions lagged behind. EU accession did not have a significant impact on the pattern of internal sigma convergence in Poland. Disparities between regions were increasing at the same pace before and after 2004, despite significant resources having been allocated to cohesion-focused undertakings after EU accession, especially in lagging eastern regions.
Źródło:
Miscellanea Geographica. Regional Studies on Development; 2021, 25, 2; 83-92
0867-6046
2084-6118
Pojawia się w:
Miscellanea Geographica. Regional Studies on Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Convergence of optimal solutions in control problems for hyperbolic equations
Autorzy:
Migórski, S.
Powiązania:
https://bibliotekanauki.pl/articles/1311423.pdf
Data publikacji:
1995
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
control problem
hyperbolic equation
G-convergence
Γ-convergence
Opis:
A sequence of optimal control problems for systems governed by linear hyperbolic equations with the nonhomogeneous Neumann boundary conditions is considered. The integral cost functionals and the differential operators in the equations depend on the parameter k. We deal with the limit behaviour, as k → ∞, of the sequence of optimal solutions using the notions of G- and Γ-convergences. The conditions under which this sequence converges to an optimal solution for the limit problem are given.
Źródło:
Annales Polonici Mathematici; 1995, 62, 2; 111-121
0066-2216
Pojawia się w:
Annales Polonici Mathematici
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the $L_1$-convergence of Fourier series
Autorzy:
Fridli, S.
Powiązania:
https://bibliotekanauki.pl/articles/1219140.pdf
Data publikacji:
1997
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Fourier series
$L_1$-convergence
a.e. convergence
Opis:
Since the trigonometric Fourier series of an integrable function does not necessarily converge to the function in the mean, several additional conditions have been devised to guarantee the convergence. For instance, sufficient conditions can be constructed by using the Fourier coefficients or the integral modulus of the corresponding function. In this paper we give a Hardy-Karamata type Tauberian condition on the Fourier coefficients and prove that it implies the convergence of the Fourier series in integral norm, almost everywhere, and if the function itself is in the real Hardy space, then also in the Hardy norm. We also compare it to the previously known conditions.
Źródło:
Studia Mathematica; 1997, 125, 2; 161-174
0039-3223
Pojawia się w:
Studia Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Convergence Analysis of An Improved Extreme Learning Machine Based on Gradient Descent Method
Autorzy:
Yusong, L.
Zhixun, S.
Bingjie, Y.
Xiaoling, G.
Zhaoyang, S.
Powiązania:
https://bibliotekanauki.pl/articles/972914.pdf
Data publikacji:
2016
Wydawca:
Społeczna Akademia Nauk w Łodzi
Tematy:
neural networks
monotonicity
weak convergence
strong convergence
USUA
MNIST
Opis:
Extreme learning machine (ELM) is an efficient algorithm, but it requires more hidden nodes than the BP algorithms to reach the matched performance. Recently, an efficient learning algorithm, the upper-layer-solution-unaware algorithm (USUA), is proposed for the single-hidden layer feed-forward neural network. It needs less number of hidden nodes and testing time than ELM. In this paper, we mainly give the theoretical analysis for USUA. Theoretical results show that the error function monotonously decreases in the training procedure, the gradient of the error function with respect to weights tends to zero (the weak convergence), and the weight sequence goes to a fixed point (the strong convergence) when the iterations approach positive infinity. An illustrated simulation has been implemented on the MNIST database of handwritten digits which effectively verifies the theoretical results.
Źródło:
Journal of Applied Computer Science Methods; 2016, 8 No. 1; 5-15
1689-9636
Pojawia się w:
Journal of Applied Computer Science Methods
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Convergence acceleration by the $E_{+p}$-algorithm
Autorzy:
Fdil, A.
Powiązania:
https://bibliotekanauki.pl/articles/1339005.pdf
Data publikacji:
1998
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
convergence acceleration
E-algorithm
linear periodic convergence
numerical quadrature
Opis:
A new algorithm which generalizes the E-algorithm is presented. It is called the $E_{+p}$-algorithm. Some results on convergence acceleration for the $E_{+p}$-algorithm are proved. Some applications are given.
Źródło:
Applicationes Mathematicae; 1998-1999, 25, 3; 327-338
1233-7234
Pojawia się w:
Applicationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Health Inequalities Across The European Union Regions: A Beta-Convergence Approach
Autorzy:
Jaworska, Renata
Powiązania:
https://bibliotekanauki.pl/articles/633175.pdf
Data publikacji:
2014-12-01
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
health inequalities
club convergence
beta-convergence
European Union regions
Opis:
The European Union is currently facing a serious problem concerning the occurrence of significant health inequalities observed between particular member states as well as within these states. Substantial efforts are being made to achieve an economic and social cohesion and the reduction of health inequalities between the EU regions is an important element of this process. This work is devoted to the study of the variations of health status (measured by life expectancy) across the EU regions of NUTS II level. We apply existing tools developed in economic growth literature to study a mortality convergence. Using the idea of unconditional convergence model developed for economic growth, we can confirm a decrease or increase of regional health inequalities. The main research hypothesis is as follows: whether regions with lower initial life expectancies have experienced the largest increases in life expectancies. To verify the hypothesis of beta-convergence we use spatial econometric models which additionally allow to take the geographic dependence among the surveyed regions into consideration. Due to the heterogeneity of the surveyed spatial units we also verify the hypothesis of the club beta-convergence.
Źródło:
Comparative Economic Research. Central and Eastern Europe; 2014, 17, 4; 71-86
1508-2008
2082-6737
Pojawia się w:
Comparative Economic Research. Central and Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mierniki konwergencji realnej wybranych krajów strefy euro. Wnioski dla Polski
Measures of real convergence of selected euro zone countries. Conclusions for Poland
Autorzy:
Michalczyk, Wawrzyniec
Powiązania:
https://bibliotekanauki.pl/articles/569840.pdf
Data publikacji:
2016
Wydawca:
Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
Tematy:
real convergence
euro zone
monetary union
measures of convergence
Opis:
The study constitutes an attempt to join the discussion about the importance of assessing convergence in the process of enlargement of European monetary union and it focuses on the comparative aspect of the degree of similarity of Polish economy in relation to the euro area and of countries that are already part of the single currency area. The aim of the article is to present the results of the indicator analysis of real convergence, which unlike the nominal one, gives a fuller picture of the desirability of state’s participation in the monetary union. These results, on the one hand, allow to draw certain conclusions regarding Poland and supporting the process of choosing the date of adoption of the euro, and on the other hand, help to determine if during the post-crisis period there occurred tendencies indicating an increase of the degree of similarity of economies already using the common currency. The research related, apart from Poland, to selected euro zone member states: France, Greece, Spain, the Netherlands, Ireland, Lithuania, Germany, Slovakia and Italy. For the purpose of the study, it was accepted that an appropriately broad selection of indicators, allowing to achieve the necessary objectivity degree of assessment of countries’ real convergence in relation to the entire euro area, would consist of: growth rate of real GDP and correlation coefficients relating to this measure, GDP per capita as a determinant of income, GDP per hour worked as an indicator of labour productivity, hourly labour costs, level of long-term unemployment, structure of gross value added, changes in the real exchange rate, long-term real interest rate and real money market rate (which, at the same level of the nominal short-term interest rate in the euro zone, is determined in each member state by the prices’ level growth rate). As the research period the years of 2004-2014 were adopted. The conducted indicator analysis of real convergence allowed to formulate a number of observations: the degree of similarity of the analysed economies to the whole monetary union is different in most cases, depending on which sphere is related to a measure; the scale of convergence of individual economies in relation to the euro zone also varies; in respect of the analysed countries, it is difficult to notice a trend towards deepening the scale of convergence in the post-crisis period; in the case of Poland, one should not rather talk about the similarity, but about far-reaching real divergences in relation to the euro zone, which result in postponing a reasonable moment to adopt the common currency.
Źródło:
Ekonomia XXI Wieku; 2016, 1 (9); 80-99
2353-8929
Pojawia się w:
Ekonomia XXI Wieku
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Roadway stability evaluation on the basis of modern monitoring of displacement
Autorzy:
Majcherczyk, T.
Niedbalski, Z.
Ulaszek, A.
Powiązania:
https://bibliotekanauki.pl/articles/178295.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
roadways
monitoring
convergence
Opis:
The paper presents the application of a 3D laser measurement technology in a modern monitoring of roadways. The authors analyze the possibility of using a three-dimensional scanning measurement of longwall working dimensions. The measurement results are presented in the form of a cloud of points obtained from a 3D laser scanning. The paper also presents a comparison of the results obtained from the convergence of traditionally-made measurements with the measurements derived from the threedimensional scanning and discusses possible methods of comparing different point clouds.
Źródło:
Studia Geotechnica et Mechanica; 2015, 37, 1; 45-52
0137-6365
2083-831X
Pojawia się w:
Studia Geotechnica et Mechanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Épistémologie du web. Convergence, collaboration, affiliation
Epistemology of the Web. Convergence, Collaboration, Affiliation
Autorzy:
Dubucs, Jacques
Powiązania:
https://bibliotekanauki.pl/articles/14977046.pdf
Data publikacji:
2022-04-06
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
convergence
collaboration
affiliation
Opis:
Résumé. En trente ans, le rapport d’Internet à l’entreprise scientifique a changé. Nous sommes passés d’un instrument de collaboration scientifique à un dispositif de réseaux sociaux qui assure la plus large diffusion à l’irrationalisme et à l’alt-factualisme. Pour comprendre ce changement, il convient de réexaminer les mécanismes de la convergence des opinions. La première source de cette convergence est l’existence d’un monde commun, qui nous expose aux mêmes faits et qui détermine par révision successive des croyances de chacun, sans que la moindre communication soit requise, une convergence asymptotique des opinions, et ce quelles que soient les croyances de départ. Naturellement, si les faits connus par les uns sont communiqués aux autres, cette convergence s’accélère considérablement, si bien que nous devons considérer la connaissance comme le résultat d’une activité collective, et l’échange d’informations comme l’une de ses sources nécessaires. D’une part, cette coopération épistémique est naturelle et facilement implémentable : en vertu des propriétés caractéristiques de l’information, qui est un bien que nous conservons lorsque nous le donnons, le partage informationnel est exempt des difficultés qui affectent généralement la coopération. D’autre part, cette coopération est intrinsèquement productive : la collaboration entre celui qui sait que φ et celui qui sait que φ implique ψ met chacun des deux agents en possession de la connaissance de ψ, qui n’était pourtant détenue par personne avant l’échange. L’internet des débuts donne à cette coopération informationnelle une ampleur inégalée. La situation actuelle est différente. Un certain nombre de facteurs, dont la porosité croissante entre les scientifiques et le large public, ont mis au premier plan l’échange, non des informations factuelles, mais celui des opinions. Les biais notoires de la psychologie humaine, au premier rang desquels le biais de confirmation, tendent à inverser le rapport entre les faits et les opinions. On cherche les faits confirmant les opinions entretenues, on met en doute les faits récalcitrants et l’on crée des faits corroborants. En bref, on passe d’une problématique de la coopération à une logique de l’affiliation, segmentant l’internet en groupes doxastiques homogènes.
Within thirty years, the relation between the Internet and the scientific activity has changed profoundly. The Internet has shifted from being an instrument of academic collaboration to being a tool used by social media, allowing for a maximum diffusion of irrationalism and alt-factualism. To understand this change, one needs re-examine the mechanisms of opinion convergence. This convergence stems primarily from the existence of the world we share, which exposes us to the same facts and determines the constant revision of each person’s beliefs. In this process of asymptotic opinion convergence, no communication between individuals is required. Of course, if the facts known by some are communicated to others, this convergence accelerates considerably, so much so that we must regard knowledge as a result of collective activity, and the exchange of information as one of its crucial sources. On the one hand, this epistemic cooperation seems natural and easy to implement. Given the properties of information, which is an asset we keep even if we share it, the sharing of information is not subject to the usual difficulties related to cooperation. Defection provides no profit, making the prisoner’s dilemma not applicable to epistemic cooperation. On the other hand, such cooperation is productive by nature: the collaboration of the one who knowns φ and the one who knows that φ implies ψ results in both agents having the knowledge of ψ, which neither of them had before the exchange. The earlier Internet allowed for an extreme intensity of this informational cooperation. At present, we are dealing with a different kind of situation. Several factors, including the growing porosity between scientists and the public, have strengthened the role of exchange. It is not an exchange of information, but an exchange of opinions. The biases inherent to human nature, and especially the confirmation bias, tends to reverse the relationship between facts and opinions. We search for the facts confirming the opinions we hold, doubt those which undermine them and create facts to corroborate what we believe. Hence, we go from cooperation to affiliation, dividing the Internet into homogenic groups of believers.
Źródło:
Zagadnienia Naukoznawstwa; 2022, 55, 3; 47-71
0044-1619
Pojawia się w:
Zagadnienia Naukoznawstwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On some triple sequence spaces of χ^3
Autorzy:
Esi, Ayhan
Nagarajan, Subramanian
Powiązania:
https://bibliotekanauki.pl/articles/1178064.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Nθ - convergence
Rough lacunary statistical convergence
chi sequence
triple sequences
Opis:
We introduce the concepts in probability of rough lacunary statistical convergence and Nθ - rough convergence of a triple sequence spaces of real numbers and discuss general properties of above rough convergence.
Źródło:
World Scientific News; 2018, 95; 159-166
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Główne wskaźniki konwergencji gospodarczej w kontekście poszczególnych polsko-ukraińskich regionów przygranicznych
The main indicators of economic convergence in the context of particular polish-ukrainian border regions
Autorzy:
Kucab-Bąk, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/2082493.pdf
Data publikacji:
2019-12-31
Wydawca:
Państwowa Wyższa Szkoła Techniczno-Ekonomiczna im. ks. Bronisława Markiewicza w Jarosławiu
Tematy:
convergence
cross-border
region
(beta) β-convergence
(sigma) σ-convergence
konwergencja
transgraniczność
(beta) β-konwergencja
(sigma) σ-konwergencja
Opis:
Głównymi czynnikami przyczyniającymi się do konwergencji w obszarze finansowym i inwestycyjnym polsko-ukraińskiego regionu transgranicznego w obecnych warunkach integracji europejskiej są intensyfikacja transgranicznych procesów inwestycyjnych w sektorach bankowym i ubezpieczeniowym, zwiększenie efektywności wykorzystania środków finansowych przeznaczonych na programy pomocy technicznej UE, jak również rozpoczęcie wspólnych transgranicznych działań instytucji finansowych. Głównym kierunkiem konwergencji społecznej i gospodarczej w ukraińsko-polskim regionie transgranicznym w ciągu ostatniej dekady była konwergencja produktu regionalnego brutto per capita.
The main factors contributing to the convergence in the financial and investment area of the Polish-Ukrainian cross-border region in the current conditions of European integration are the intensification of cross-border investment processes in the banking and insurance sectors, increasing the efficiency of the use of funds allocated to EU technical assistance programs, as well as the launch of joint cross-border activities of financial institutions. The main direction of social and economic convergence in the Ukrainian-Polish cross-border region over the last decade was the convergence of gross regional product per capita.
Źródło:
Edukacja • Terapia • Opieka; 2019, 1; 223-241
2658-0071
2720-2429
Pojawia się w:
Edukacja • Terapia • Opieka
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 602

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