Zobrazeno 1 - 10
of 4 297
pro vyhledávání: '"long-range dependence"'
Publikováno v:
Frontiers in Physics, Vol 12 (2024)
Understanding the long-range dependence and self-similarity of global sea surface chlorophyll concentration (SSCC) will enrich its characteristics description and analysis with global change patterns. The satellite SSCC products were collected from t
Externí odkaz:
https://doaj.org/article/5681d0ea1dcf433f8de74a7ecc642c14
Publikováno v:
Fractal and Fractional, Vol 8, Iss 6, p 353 (2024)
We consider fractional integral operators (I−T)d,d∈(−1,1) acting on functions g:Zν→R,ν≥1, where T is the transition operator of a random walk on Zν. We obtain the sufficient and necessary conditions for the existence, invertibility, and
Externí odkaz:
https://doaj.org/article/4a27bd2b0a0f408c998148720347b3df
Publikováno v:
Modern Stochastics: Theory and Applications, Vol 10, Iss 4, Pp 343-366 (2023)
The so-called multi-mixed fractional Brownian motions (mmfBm) and multi-mixed fractional Ornstein–Uhlenbeck (mmfOU) processes are studied. These processes are constructed by mixing by superimposing or mixing (infinitely many) independent fractional
Externí odkaz:
https://doaj.org/article/5c2968438ebd483082828b38650f9c51
Publikováno v:
Heliyon, Vol 10, Iss 4, Pp e26635- (2024)
In this paper we discuss the details, limitations, and difficulties of the implementation in hardware of a memristor-based random number generator that exhibits monofractal/multifractal behavior. To do so, the components and selection criteria of a r
Externí odkaz:
https://doaj.org/article/b14a8ff10ec24c3bac09efab87945c9e
Autor:
Wanqing Song, Mingdeng Zhong, Minjie Yang, Deyu Qi, Simone Spadini, Piercarlo Cattani, Francesco Villecco
Publikováno v:
Fractal and Fractional, Vol 8, Iss 4, p 183 (2024)
Roller bearing degradation features fractal characteristics such as self-similarity and long-range dependence (LRD). However, the existing remaining useful life (RUL) prediction models are memoryless or short-range dependent. To this end, we propose
Externí odkaz:
https://doaj.org/article/f007d9a06989449b932bddf7406eb617
Publikováno v:
Energies, Vol 17, Iss 6, p 1335 (2024)
To enhance the economic viability of wind energy in cold regions and ensure the safe operational management of wind farms, this paper proposes a short-term wind turbine blade icing wind power prediction method that combines principal component analys
Externí odkaz:
https://doaj.org/article/1a70c82937af44dbb0c0be19da146ae5
Publikováno v:
Frontiers in Physics, Vol 11 (2023)
Recently, the growth of blockchain technology and the economic benefits of cryptocurrencies have led to a proliferation of malicious cryptomining activities on the internet, resulting in significant losses for companies and institutions. Therefore, a
Externí odkaz:
https://doaj.org/article/d63f349d0ba747b8bd8e9b7cd67cc2f3
Autor:
Aristotelis Koskinas, Eleni Zaharopoulou, George Pouliasis, Ilias Deligiannis, Panayiotis Dimitriadis, Theano Iliopoulou, Nikos Mamassis, Demetris Koutsoyiannis
Publikováno v:
Earth, Vol 3, Iss 3, Pp 1027-1041 (2022)
Hydroclimatic processes such as precipitation, temperature, wind speed and dew point are usually considered to be independent of each other. In this study, the cross–correlations between key hydrological-cycle processes are examined, initially by c
Externí odkaz:
https://doaj.org/article/b4391c1782b14d7783c8061fe2f84cd5
Autor:
Deyu Qi, Zijiang Zhu, Fengmin Yao, Wanqing Song, Aleksey Kudreyko, Piercarlo Cattani, Francesco Villecco
Publikováno v:
Fractal and Fractional, Vol 8, Iss 1, p 55 (2024)
Remaining useful life prediction guarantees a reliable and safe operation of turbofan engines. Long-range dependence (LRD) and heavy-tailed characteristics of degradation modeling make this method advantageous for the prediction of RUL. In this study
Externí odkaz:
https://doaj.org/article/31da1b3a0679457dac6ac412c6851727