Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Mihaela Sterpu"'
Publikováno v:
Electronic Research Archive, Vol 30, Iss 1, Pp 382-403 (2022)
The generic double-Hopf bifurcation is presented in detail in literature in textbooks like references. In this paper we complete the study of the double-Hopf bifurcation with two degenerate (or nongeneric) cases. In each case one of the generic condi
Externí odkaz:
https://doaj.org/article/e0d1fe4fcf3c496b91f85632a525d07f
Publikováno v:
Mathematics, Vol 11, Iss 15, p 3351 (2023)
This study proposes a generalized grey Lotka–Volterra model with a finite number of variables. The model is obtained by applying the grey modelling method to estimate the parameters of a finite dimensional quadratic Lotka–Volterra system. Subsequ
Externí odkaz:
https://doaj.org/article/17a1d10e95bc44b49b6178f843a246c1
Publikováno v:
Mathematics, Vol 11, Iss 13, p 2911 (2023)
Two nutrient–phytoplankton–zooplankton (NZP) models for a closed ecosystem that incorporates a delay in nutrient recycling, obtained using the gamma distribution function with one or two degrees of freedom, are analysed. The models are described
Externí odkaz:
https://doaj.org/article/015c6f4652944966bb0bf6ce9536f6f5
Publikováno v:
Technological and Economic Development of Economy, Vol 26, Iss 2 (2020)
This paper analyses the relationship between the following indicators: income inequality, gross domestic product, risk of poverty threshold and median equivalized net income for a panel of 28 countries of European Union (EU) over the period 2005-2016
Externí odkaz:
https://doaj.org/article/90a8a9d738bd4c98b58565a647bb95d4
Publikováno v:
Energies, Vol 14, Iss 9, p 2394 (2021)
This paper analyzes the impact of the COVID-19 pandemic on economic growth and electricity consumption and investigates the hypothesis of the influence of this consumption on the gross domestic product (GDP) for Romania. Using time series on monthly
Externí odkaz:
https://doaj.org/article/6fb367c3e34c4e74a2d0d9fa70fe3a28
Publikováno v:
Technological and Economic Development of Economy, Vol 24, Iss 3 (2018)
This study examines the causal relationship between economic growth and renewable energy consumption using data for 28 countries of European Union, taken from Eurostat database for years from 1995 to 2015. In addition, motivated by EU Directive 2009/
Externí odkaz:
https://doaj.org/article/2b322e80b4514e75ad57660008d4a276
Publikováno v:
Mathematics; Volume 11; Issue 13; Pages: 2911
Two nutrient–phytoplankton–zooplankton (NZP) models for a closed ecosystem that incorporates a delay in nutrient recycling, obtained using the gamma distribution function with one or two degrees of freedom, are analysed. The models are described
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=multidiscipl::babcd9e09610b2022a0b971cb4ae257a
Autor:
Mihaela Sterpu, Carmen Rocsoreanu
Publikováno v:
Electronic Research Archive. 30:382-403
The generic double-Hopf bifurcation is presented in detail in literature in textbooks like references. In this paper we complete the study of the double-Hopf bifurcation with two degenerate (or nongeneric) cases. In each case one of the generic condi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b04d6ff2ef3b895691bdd0ae317fc5c
https://doi.org/10.3934/era.2022020
https://doi.org/10.3934/era.2022020
Publikováno v:
Sustainability; Volume 14; Issue 14; Pages: 8943
This study analyzes the use of e-commerce by European Union enterprises. Based on an analysis of the evolution of the percentage of enterprises that perform e-commerce and the share of total turnover obtained from e-commerce, for the period of 2003
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ae1de4b02acb35c1822308704a05aea
https://doi.org/10.3390/su14148943
https://doi.org/10.3390/su14148943
Publikováno v:
Energies; Volume 14; Issue 9; Pages: 2394
Energies, Vol 14, Iss 2394, p 2394 (2021)
Energies, Vol 14, Iss 2394, p 2394 (2021)
This paper analyzes the impact of the COVID-19 pandemic on economic growth and electricity consumption and investigates the hypothesis of the influence of this consumption on the gross domestic product (GDP) for Romania. Using time series on monthly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9140d06f2a17bfc9453562599ce3109