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Tytuł:
Influence of the supporting spring stiffness on the vibrations and stability of geometrically non-linear column
Autorzy:
Przybylski, J.
Powiązania:
https://bibliotekanauki.pl/articles/280637.pdf
Data publikacji:
2001
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
natural vibrations
divergence
flutter
Opis:
In the paper, the non-linear vibrations and stability of a compound tworod column with different bending rigidities of its members are investigated. The support of the column is pinned and has a rotational spring the stiffness of which can be either constant or dependent on the applied load. A perturbation technique is chosen to solve the problem. As the column is loaded by a partially follower load it loses its stability via divergence or flutter. For the case of the nonconservative load an adjoint system is formulated for finding the amplitude-frequency relation. The linear part of the natural frequency for adjoint systems is the same, but the non-linear terms differ for each system because they depend on the vibration modes. The support stiffening may lower the critical load of the column.
Wpływ sztywności sprężyny podpierającej geometrycznie nieliniową kolumnę na jej drgania i stateczność. W pracy analizowane są drgania i stateczność kolumny złożonej z dwóch prętów i podpartej na sprężynie rotacyjnej, której sztywność jest stała lub zależna od przyłożonego obciążenia zewnętrznego. Ponieważ siła zewnętrzna jest częściowo śledząca, to kolumna może tracić stateczność przez dywergencję lub flatter. Celem znalezienia relacji amplituda-częstość dla obciążenia niezachowawczego znaleziono układ sprzężony. Wykazano, że liniowy składnik rozwinięcia częstości drgań obu układów jest taki sam, natomiast składowe nieliniowe są różne. Przeprowadzono badania numeryczne, na podstawie których stwierdzono m.in., że wzrost sztywności sprężyny podpierającej kolumnę może obniżać wartość jej siły krytycznej.
Źródło:
Journal of Theoretical and Applied Mechanics; 2001, 39, 1; 129-152
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wokół liczb i szeregów harmonicznych
Around harmonic numbers and harmonic series
Autorzy:
Wiśniewski, Damian
Powiązania:
https://bibliotekanauki.pl/articles/1791001.pdf
Data publikacji:
2017-07-04
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
harmonic numbers
harmonic series
divergence
Opis:
The harmonic series is one of the most celebrated infinite series ofmathematics. From a pedagogical point of view, the harmonic series providesa wealth of opportunities. Applications such as Gabriel’s wedding cake andEuler’s proof of the divergence of prime numbers can lead to some verynice discussions. The main idea of this article is to survey some of unusual,insightful and inspiring divergence proofs. First of all, this article is addressedat first-year calculus students.
Źródło:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia; 2015, 7; 99-109
2080-9751
2450-341X
Pojawia się w:
Annales Universitatis Paedagogicae Cracoviensis. Studia ad Didacticam Mathematicae Pertinentia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the Macroeconomic Stability of Central and Eastern European Countries with a View Toward their Membership in the European Union. Multidimensional Risk Analysis
Autorzy:
Pera, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/633147.pdf
Data publikacji:
2016-09-01
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
stability
risk
imbalance
destabilisation
divergence
Opis:
The economies of European countries have been undergoing constant turbulence for several years. This is the consequence of a range of factors, in particular: the 2007 crisis; violations of the convergence criteria and fiscal discipline; problems with the liquidity of international financial markets; depreciation of the euro currency; increasing unemployment in European Union Member States; the slow increase in productivity in the majority of EU economies; growing indebtedness of public finance sectors; problems with retirement schemes – in particular with correlation between their effectiveness and unemployment and low rate of natural increase. Thus, the author posits that it is important to analyse the key aspects related to these economic parameters which may affect this process in a significant way and decide the risk of its occurrence. This is the assumed aim of this work. The work shows the results of the author’s own study, carried out with the use of different methods, such as the macroeconomic stabilisation pentagon, the Scoreboard, and Spearman's rank correlation coefficient. The variety of test methods employed results on one hand from the problem's complexity, and on the other from a profound analysis of all dependencies and risks resulting from this complexity. The conducted study shows that there is a significant correlation between the Scoreboard parameter imbalances and the intensity of crisis phenomena in case of violations of the acceptable thresholds in terms of current account balance, net international investment position, export market shares, nominal unit labour costs, real house prices, private sector debt, government debt, and the unemployment rate. The imbalances of these eight indicators may form an adverse macroeconomic environment favouring the occurrence of intense crisis phenomena, which means that they should be subject to special monitoring. The shapes of the macroeconomic stabilisation pentagon for CEEC economies in 2014 shows that none of the analysed countries is characterised by total filling of the pentagon. This means that the economic situation in these countries is not stable and requires constant monitoring. The figures related to all analysed indicators, apart from GDP, are characterised by a flattened shape, which is characteristic for such a situation.
Źródło:
Comparative Economic Research. Central and Eastern Europe; 2016, 19, 3; 69-92
1508-2008
2082-6737
Pojawia się w:
Comparative Economic Research. Central and Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The risk of the increasing divergence of the eurozone and the problem of macroeconomic imbalances in a three-gap model
Autorzy:
Jacek, Pera
Powiązania:
https://bibliotekanauki.pl/articles/557871.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Ekonomiczny w Poznaniu
Tematy:
convergence
divergence
risk
eurozone
imbalance
Opis:
The negative effects of the last financial and economic crisis as seen in the deterioration of the state of public finances of the eurozone Member States highlighted weaknesses in the present institutional system. The fact that structural reforms have stopped, as well as unfavourable demographic changes, make the convergence processes and the growth of eurozone economies slow down. Increasing divergence with regard to trade balance deficits, budget deficits, investments and private savings is a significant limiting factor here. The aim of this paper is to answer the question as to whether the present situation of the eurozone economies is of a convergent or divergent nature. For this purpose the following have been analysed and assessed: the last financial crisis' consequences for eurozone countries; basic indicators related to the EU Member States' macroeconomic situation; domestic economies convergence/divergence in the eurozone - in relation to other Member States; increased divergence of regional development within a country, the so-called regional divergence; criteria of convergence; macroeconomic factors and – as mentioned before – the listed indicators resulting from the research method adopted . The method of study in this paper was the analysis of the risk of the eurozone's macroeconomic imbalance on the basis of the three-gap model.Results of the analysis showed significant imbalances within individual economies in terms of all the above mentioned parameters. This analysis showed the increasing trend related to eurozone divergence.
Źródło:
Economics and Business Review; 2016, 2(16), 2; 18-38
2392-1641
Pojawia się w:
Economics and Business Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On bifurcation load of a three-member slender system with an internal crack subjected to Euler’s load
Autorzy:
Uzny, S.
Sokół, K.
Powiązania:
https://bibliotekanauki.pl/articles/280847.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
column
divergence
conservative load
crack
Opis:
The results of numerical simulations presented in this paper are concerned with instability of a three member slender system subjected to Euler load. The investigated column is built up as a flat frame composed of three rods. In the internal one, the defect is present in form of a crack. The boundary problem has been formulated on the basis of a static criterion of instability. The boundary conditions associated with different types of supports are obtained by proper selection of parameters of the generalized load. On the basis of these results, the magnitude of bifurcation load can be determined.
Źródło:
Journal of Theoretical and Applied Mechanics; 2018, 56, 1; 269-281
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Convergence and divergence processes in regional development
Autorzy:
Burnasov, Alexander
Ilyushkina, Maria
Kovalev, Yuri
Stepanov, Anatoly
Powiązania:
https://bibliotekanauki.pl/articles/438255.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
Tematy:
convergence
divergence
globalization
regional development
Opis:
The article deals with the basic trends of regions in the context of globalization and regionalizationof the world’s economy. The most important factors of regional development today are theinnovation resource areas, their institutional environment, political regimes as well as regional policy,and geographical and socio-demographic factors.
Źródło:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego; 2014, 26; 25-30
2080-1653
Pojawia się w:
Prace Komisji Geografii Przemysłu Polskiego Towarzystwa Geograficznego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contingence et représentation arborescente: le cheminement de Darwin des les otebooks jusqu’à la première édition de l’Origine des Espèces
Contingence and tree-like representation: Darwin from the 1otebooks to the first edition of the Origin of the Species
Autorzy:
Soubbotnik, Michael A.
Powiązania:
https://bibliotekanauki.pl/articles/1048489.pdf
Data publikacji:
2018-05-16
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Darwin
1otebooks
representation
divergence
selection
contingence
Opis:
This study attempts to show how Darwin’s 1otebooks provide evidence that the author of the Origin of the Species moved further and further away from various versions of a “system of nature” based on some complex, abstract, finalized order, by combining empirical testing and shifts in the schematic representation of the relations between taxonomic categories.
Źródło:
Studia Romanica Posnaniensia; 2017, 44, 4; 95-115
0137-2475
2084-4158
Pojawia się w:
Studia Romanica Posnaniensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dywergencja zachowań konsumenckich na przykładzie rynku turystycznego
Divergence in Consumer Behavior Based on the Tourism Market
Дивергенция потребительского поведения на примере туристического рынка
Autorzy:
Niezgoda, Agnieszka
Markiewicz, Ewa
Gierczak, Beata
Powiązania:
https://bibliotekanauki.pl/articles/549354.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
konsument
dywergencja
rynek turystyczny
consumer
divergence
tourism market
Opis:
Celem artykułu jest próba usystematyzowania zjawiska dywergencji zachowań konsumentów. Rozważania skupione zostaną wokół problematyki rynku turystycznego, jako przykładu rynku, na którym mogą zachodzić omawiane zjawiska. Na złożonym rynku turystycznym analiza procesów wynikających z tych procesów jest ważna z uwagi na możliwość indywidualnego podejścia do kompleksowego produktu turystycznego. Artykuł ma charakter przeglądowy, a główną metodą badawczą jest kwerenda literatury. Autorki dokonują przeglądu pojęć zjawiska dywergencji i dokonują usystematyzowania podejść wielu autorów. Zjawisko dywergencji prezentowane jest bowiem w ujęciu ogólnym, psychologicznym (tzw. myślenie dywergencyjne), a także w odniesieniu do procesów rozwoju regionalnego. Rzadziej zjawisko to omawiane jest w odniesieniu do zjawisk rynkowych. Autorki skupiają się właśnie na tym ostatnim podejściu, wykorzystując analizę rynku turystycznego, jako rynku, na którym istnieją warunki zachowań dywergen-cyjnych konsumentów. Cechy produktu turystycznego powodują występowanie zachowań dywergencyjnych w ra-mach usług świadczonych przez dany podmiot turystyczny. Jednocześnie mogą występować rów-nież zachowania konwergencyjne, czyli przeciwstawne do zjawisk dywergencyjnych (na przykład konwergencja wobec usługi noclegowej i dywergencja wobec usługi gastronomicznej danego przedsiębiorstwa hotelowego). W sytuacji nabywania gotowych pakietów, zachowania dywergencyjne nie zdarzają się tak często, jak w przypadku indywidualnego zestawiania usług przez konsumenta, który traktuje produkt turystyczny w ujęciu produktu obszaru. Omawiane procesy współistnieją ze zjawiskami charakteryzującymi współczesny rynek turystyczny po stronie popytu: prosumpcją, indywidualizacją oraz wirtualizacją konsumpcji. Zjawiskiem warunkującym te procesy jest globalizacja.
This article attempts to systematize the phenomenon of divergence in consumer behaviour. Considerations are focused on problems of the tourism market, as an example of the market where the discussed phenomenon can occur. An analysis of processes resulting from these processes is important on the complex tourism market because of the possibility of an individual approach to a comprehensive tourism product. The article is a review, and literature query is the main research method. The authors present a review of the concepts of divergence and systematize approaches of many other authors. Divergence is presented generally and psychologically (i.e. ‘divergent thinking’), as well as in relation to processes of regional development. This phenomenon is rarely discussed in relation to market phenomena. The authors focus is on the latter approach, using an analysis of the tourism market as the market where there are conditions for the divergence in consumer behaviour. Features of the tourism product cause the incidence of behavioural divergence within the services provided by a tourist operator. At the same time convergent behaviour may also occur, which is the opposite to the divergence phenomena (for example the convergence of an accommodation service and divergence of a catering service provided by a particular hotel). Divergent behaviour occurs less often when a package is bought compared with a custommade offer, as the customer regards the tourism product in terms of a product from the particular area. These processes coexist with the phenomena characterizing contemporary tourist market on the demand side: prosumption, individualization and virtualization of consumption. Globalization conditions these processes.
Źródło:
Nierówności Społeczne a Wzrost Gospodarczy; 2016, 45; 96-104
1898-5084
2658-0780
Pojawia się w:
Nierówności Społeczne a Wzrost Gospodarczy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Konwergencja czy dywergencja polskich rynków pracy?
Convergence or Divergence of Polish Job Markets
Autorzy:
Misiak, Tadeusz
Tokarski, Tomasz
Włodarczyk, Robert W.
Powiązania:
https://bibliotekanauki.pl/articles/574267.pdf
Data publikacji:
2011-08-31
Wydawca:
Szkoła Główna Handlowa w Warszawie. Kolegium Analiz Ekonomicznych
Tematy:
labor market
labor productivity
unemployment
wages
convergence
divergence
Opis:
The authors employ statistical analysis to determine if Poland’s regional and local job markets are subject to convergence or divergence in macroeconomic terms. The article analyzes selected labor market variables such as productivity at the regional level, real wages and the unemployment rate. The analyses are based on data from the website www.stat.gov.pl for the 2002-2009 period and for the 2002-2007 period in the case of labor productivity. The authors examine the main theoretical aspects of the processes of real convergence and divergence. They present statistical analyses of unconditional s - and b-convergence at the regional and local levels using panel data. The article ends with a summary and a set of conclusions. The research carried out by the authors reveals that none of the analyzed labor market variables, at either the local or regional levels, was subject to s-convergence throughout the analyzed period, but in specific sub-periods both convergence and divergence processes were observed. The convergence equations estimated by the authors show that only the unemployment rate was subject to b-convergence in both regional and local terms. In the analysis at the regional level, a divergence of real wages was observed in 15 provinces, with Mazovia province being the only exception nationwide. In turn, the research did not confirm that there is a divergence of wages at the county level, the authors note. In the analyzed period, labor productivity at the regional level was not subject to either b-convergence or divergence.
Źródło:
Gospodarka Narodowa. The Polish Journal of Economics; 2011, 249, 7-8; 47-69
2300-5238
Pojawia się w:
Gospodarka Narodowa. The Polish Journal of Economics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cielesność dywergencyjna – komponent integralnej edukacji wychylonej w przyszłość
Divergent corporality as a component of integral education inclined towards the future
Autorzy:
Krasoń, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1388684.pdf
Data publikacji:
2015-12-31
Wydawca:
Uniwersytet Gdański. Wydawnictwo Uniwersytetu Gdańskiego
Tematy:
expression
theatre of movement in pre-school education
divergence
Opis:
A child is endowed with a natural inclination to manifest its feelings, to control things and ideas in the form of behaviour which could be an expression of various fine arts. Each element of art (music, dancing as a system of signs may change its code, as the same symbols may be conveyed in another semiotic code, for example: a system of sounds in kinetic-spatial exemplification. Listening to music (acoustic signs) is in this play transcoded into kinetic-bodily signs. Experiencing oneself by means of movement, creating an individual story about oneself through gesture activates the subconscious, facilitates visualizing past experiences, feeling them again, and analyzing. The present study focuses on the connection between the classes devoted to kinesthetic visualization and the motoric behaviour presented by a child displaying the level of its creativity. The text presents individualizing experimental tests carried out in a group of five-year-old children.
Źródło:
Problemy Wczesnej Edukacji; 2015, 31, 4; 7-22
1734-1582
2451-2230
Pojawia się w:
Problemy Wczesnej Edukacji
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The world economy in the XXI c.: will the XX c. trends persist?
Autorzy:
Gomułka, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/703016.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
global economic trends
centuries XX and XXI
convergence
divergence
Opis:
The paper proposes a list of five „stylized facts”, regarded as the main trends with respect to the development of the global economy in the 20th c. The author’s main purpose is to answer the question whether, in the light of the contemporary growth theory and demographic forecasts, these trends are likely to continue unchanged also in the 21st c. Taking into account this theory and those forecasts, the paper offers forecasts of the average GDP per capita for both the countries of the Technology Frontier Area (TFA) and the catching-up countries. By these forecasts, the strong divergence trend of the last two centuries will be replaced by a strong convergence trend during the 21st c. Moreover, the global rate of growth of the per capita  GDP will continue to be high in the first half of the current century, but strongly declining in the second half.
Źródło:
Nauka; 2017, 1
1231-8515
Pojawia się w:
Nauka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Information infrastructure as a pillar of the knowledge-based economy ? an analysis of regional differentiation in Poland
Autorzy:
Wierzbicka, Wioletta
Powiązania:
https://bibliotekanauki.pl/articles/22446582.pdf
Data publikacji:
2018
Wydawca:
Instytut Badań Gospodarczych
Tematy:
information infrastructure
knowledge-based economy
regional differentiation
divergence
convergence
Opis:
Research background: Information infrastructure is a very important pillar within a knowledge-based economy. The widespread use of information and communication technologies facilitates effective communication, dissemination and processing of information and knowledge. It also creates new opportunities for the effective use of knowledge and information in building competitive advantage. Information infrastructure is also a significant determinant in the development of territorial units, and therefore it affects the regional dimension of building the knowledge-based economy in Poland. Purpose of the article: The purpose of the study was to evaluate regional differentiation of the level of information infrastructure in Poland, and changes which occurred in this respect between 2010 and 2015. An attempt was made to provide an answer to the following question: Are regional differences in the level of information infrastructure in Poland increasing or decreasing, i.e. is a regional divergence or a regional convergence process taking place in this respect? Methods: Taxonomic methods were used, including linear ordering based on a synthetic variable and a method of grouping linearly-ordered objects. Findings & Value added: The regional differentiation of the level of information infra-structure in Poland has slightly decreased, which means, that a slow convergence process has taken place in this respect. This fact is confirmed by the value of the variation coefficient, which fell from a level of 17.6% in 2010 to a level of 14.4% in 2015. Convergence processes were observed in twelve provinces. In the case of seven of them, they had the nature of a catching-up effect, and in the case of the remaining five — a lagging-behind effect. Divergence processes were observed in four provinces. The Dolnośląskie and Mazowieckie Provinces distanced themselves from other areas of the country. In the Małopolskie and Opolskie Provinces a marginalisation effect was observed.
Źródło:
Equilibrium. Quarterly Journal of Economics and Economic Policy; 2018, 13, 1; 123-139
1689-765X
2353-3293
Pojawia się w:
Equilibrium. Quarterly Journal of Economics and Economic Policy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Global Economy in the 21st Century: Will the Trends of the 20th Century Continue?
Autorzy:
Gomułka, Stanisław
Powiązania:
https://bibliotekanauki.pl/articles/1357658.pdf
Data publikacji:
2018-03-21
Wydawca:
Uniwersytet Warszawski. Wydział Nauk Ekonomicznych
Tematy:
global economic trends
20th and 21st centuries
convergence
divergence
Opis:
This paper compares three lists of basic ‘stylized facts’ of global economic growth and proposes a list of five ‘stylized trends’ that describe the main developments of the global economy in the 20th century. The author’s main purpose is to answer the question whether, in the light of the contemporary growth theory and demographic forecasts, these trends are likely to continue in the 21st century. Considering this theory, it is argued that the global economy rate of growth of the per capita gross domestic product (GDP) is likely to continue to be high in the first half of the current century, but decline significantly in the second half. This paper offers forecasts for the average growth rates during this century, and the levels by its end, of the per capita GDP for the technology frontier area (TFA) of the world, and for the countries outside the TFA. According to these forecasts, the strong divergence trend of the 19th and 20th centuries will be replaced by a strong convergence between the TFA and the other countries during the 21st century.
Źródło:
Central European Economic Journal; 2017, 2, 49; 62 - 72
2543-6821
Pojawia się w:
Central European Economic Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Solving the stationary hydroaeroelasticity problem for dynamic deflection elements of separation devices
Autorzy:
Pavlenko, I.
Liaposhchenko, A.
Ochowiak, M.
Demyanenko, M.
Powiązania:
https://bibliotekanauki.pl/articles/127686.pdf
Data publikacji:
2018
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
finite element method
gas-dispersed flow
divergence
metoda elementów skończonych
rozbieżność
Opis:
The paper presents a method for expanding the working range of separation elements, where the separation is conducted through the use of inertia particles. The presented dynamic separation elements work as the automatic control system (the regulating action is the elastic energy; the regulation object is the hydraulic resistance). It was taken the first step to the engineering method development for their calculation using analytical dependences of the finite element method. The critical velocity of the gas-liquid flow was determined, that causes a divergence phenomenon of dynamic separation device elements and expressions for generalized forces for the system “gas-liquid flow is a dynamic deflection element.” Two-knot finite elements with two degrees of freedom (transverse displacement and angle of the cross-section rotation) were used for dynamic deflection elements. The given number of degrees of freedom of the mechanical system “gas-liquid flow is a dynamic deflection element” due to the consideration of the transverse deformations of the plate allows simplifying the mathematical model. It was suggested to use aerohydroplastic phenomena of dynamic non-stability of dynamic deflection elements of separating devices, analogous to the method of applying acoustic oscillations to a heterogeneous stream, for the coagulation of dispersed particles in the flow.
Źródło:
Vibrations in Physical Systems; 2018, 29; 1-7
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Population diversity maintenance in brain storm optimization algorithm
Autorzy:
Cheng, S.
Shi, Y.
Qin, Q.
Zhang, Q
Bai, R.
Powiązania:
https://bibliotekanauki.pl/articles/91571.pdf
Data publikacji:
2014
Wydawca:
Społeczna Akademia Nauk w Łodzi. Polskie Towarzystwo Sieci Neuronowych
Tematy:
brainstorm
optimization algorithm
convergence
divergence
brainstorm optimization
BSO
swarm intelligence
BSO algorithm
Opis:
The convergence and divergence are two common phenomena in swarm intelligence. To obtain good search results, the algorithm should have a balance on convergence and divergence. The premature convergence happens partially due to the solutions getting clustered together, and not diverging again. The brain storm optimization (BSO), which is a young and promising algorithm in swarm intelligence, is based on the collective behavior of human being, that is, the brainstorming process. The convergence strategy is utilized in BSO algorithm to exploit search areas may contain good solutions. The new solutions are generated by divergence strategy to explore new search areas. Premature convergence also happens in the BSO algorithm. The solutions get clustered after a few iterations, which indicate that the population diversity decreases quickly during the search. A definition of population diversity in BSO algorithm is introduced in this paper to measure the change of solutions’ distribution. The algorithm’s exploration and exploitation ability can be measured based on the change of population diversity. Different kinds of partial reinitialization strategies are utilized to improve the population diversity in BSO algorithm. The experimental results show that the performance of the BSO is improved by part of solutions re-initialization strategies.
Źródło:
Journal of Artificial Intelligence and Soft Computing Research; 2014, 4, 2; 83-97
2083-2567
2449-6499
Pojawia się w:
Journal of Artificial Intelligence and Soft Computing Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 35

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