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Academic Articles & Research Papers
Showing 20 of 227 academic articles
Julles Mitoura dos Santos Junior, Adriano Pinto Mariano • Eng
(2024)
As one of the main industrial segments of the current geoeconomics scenario, agro-industrial activities generate excessive amounts of waste. The gasification of such waste using supercritical water (SCWG) has the potential to convert the wa...
DOAJ
Open Access (DOAJ)
DOI: 10.3390/eng5020060
Peiliang Zuo, Tao Peng, Wangdan Linghu, Wenbo Wang • IEEE Access
(2018)
Cognitive satellite communications (SatCom) is considered to be able to alleviate the bottleneck of spectrum resource shortage due to traditional spectrum allocation. This paper focuses on a special scenario where the frequency band of SatC...
DOAJ
Open Access (DOAJ)
DOI: 10.1109/ACCESS.2018.2882795
Zahra Abdelmalek, M. Zubair Akbar Qureshi, S. Bilal, Qadeer Raza et al. • Case Studies in Thermal Engineering
(2021)
The consolidation power of different nanomaterials such as metallic nanoparticles and metallic-oxides nanoparticles in a new-fangled and energetic hybrid material should give rise to fascinating properties that combine the advantages of eac...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.csite.2020.100744
Yong-Min Li, M. Ijaz Khan, Sohail A. Khan, Sami Ullah Khan et al. • Scientific Reports
(2021)
Abstract Entropy optimization in convective viscous fluids flow due to a rotating cone is explored. Heat expression with heat source/sink and dissipation is considered. Irreversibility with binary chemical reaction is also deliberated. Nonl...
DOAJ
Open Access (DOAJ)
DOI: 10.1038/s41598-021-89739-7
Li Ji, Huayong Zhang, Huayong Zhang, Zhongyu Wang et al. • Frontiers in Marine Science
(2025)
Warming is a key factor influencing the function of the structure and function of phytoplankton communities. However, the impacts of temperature on phytoplankton resource use efficiency (RUE) in mountain rivers remain poorly understood. Her...
DOAJ
Open Access (DOAJ)
DOI: 10.3389/fmars.2025.1565858
S. Byrdina, P. Shebalin, P. Shebalin, C. Narteau et al. • Nonlinear Processes in Geophysics
(2006)
In order to estimate the hazard rate distribution of the largest seismic events in Vrancea, South-Eastern Carpathians, we study temporal properties of historical and instrumental catalogues of seismicity. First, on the basis of Generalized ...
DOAJ
Open Access (DOAJ)
K. Unnikrishnan • Nonlinear Processes in Geophysics
(2010)
In the present study, the latitudinal aspect of chaotic behaviour of ionosphere during quiet and storm periods are analyzed and compared by using GPS TEC time series measured at equatorial trough, crest and outside crest stations over India...
DOAJ
Open Access (DOAJ)
DOI: 10.5194/npg-17-765-2010
V. Stolbova, P. Martin, B. Bookhagen, N. Marwan et al. • Nonlinear Processes in Geophysics
(2014)
This paper employs a complex
network approach to determine the topology and evolution of the network of
extreme precipitation that governs the organization of extreme rainfall
before, during, and after the Indian Summer Monsoon (ISM) season...
DOAJ
Open Access (DOAJ)
DOI: 10.5194/npg-21-901-2014
G. Lacorata, A. Vulpiani • Nonlinear Processes in Geophysics
(2007)
We show how a general formulation of the Fluctuation-Response Relation is able to describe in detail the connection between response properties to external perturbations and spontaneous fluctuations in systems with fast and slow variables. ...
DOAJ
Open Access (DOAJ)
K. Kurosawa, K. Kurosawa, S. Kotsuki, S. Kotsuki et al. • Nonlinear Processes in Geophysics
(2023)
This study explores coupled land–atmosphere data assimilation (DA) for improving weather and hydrological forecasts by assimilating soil moisture (SM) data. This study integrates a land DA component into a global atmospheric DA system of th...
DOAJ
Open Access (DOAJ)
DOI: 10.5194/npg-30-457-2023
I.D. Mayergoyz (1991)
The research described in this proposal is currently being supported by the US Department of Energy under the contract Mathematical Models of Hysteresis''. Thus, before discussing the proposed research in detail, it is worthwhile to describ...
OPENALEX
Open Access
DOI: https://doi.org/10.2172/6911694
Jose Luiz Boldrini, Cristina Lucia Dias Vaz • Electronic Journal of Differential Equations
(2003)
We study the existence and regularity of weak solutions of a phase field type model for pure material solidification in presence of natural convection. We assume that the non-stationary solidification process occurs in a two dimensional bou...
DOAJ
Open Access (DOAJ)
Irina Astashova • Mathematical Modelling and Analysis
(2016)
The asymptotic behavior of all solutions to the fourth-order Emden– Fowler type differential equation with singular nonlinearity is investigated. The equation is transformed into a system on the three-dimensional sphere. By investigation of...
DOAJ
Open Access (DOAJ)
DOI: 10.3846/13926292.2016.1185043
Saeed Dinarvand • Journal of Applied Mathematics
(2012)
The steady three-dimensional flow of condensation or spraying on inclined spinning disk is studied analytically. The governing nonlinear equations and their associated boundary conditions are transformed into the system of nonlinear ordinar...
DOAJ
Open Access (DOAJ)
DOI: 10.1155/2012/634102
I.D. Mayergoyz • IEEE Transactions on Magnetics
(1986)
A new approach to the scalar Preisach model of hysteresis, which emphasizes its phenomenological nature and mathematical generality, is described. The theorem, which gives the necessary and sufficient conditions for the representation of ac...
OPENALEX
DOI: https://doi.org/10.1109/tmag.1986.1064347
Jens G. Balchen, Bernt Lie, Ingar Solberg • Modeling, Identification and Control
(1988)
A simple method has been investigated for the total or partial removal of the effect of non-linear process phenomena in multi-variable feedback control systems. The method is based upon computing the control variables which will drive the p...
DOAJ
Open Access (DOAJ)
DOI: 10.4173/mic.1988.3.3
Eric Ngondiep • Heliyon
(2024)
This paper constructs a three-step second-order numerical approach for solving a mathematical model on the dynamic of corruption and poverty. The stability and error estimates of the proposed technique are analyzed using the L2-norm. The de...
DOAJ
Open Access (DOAJ)
DOI: 10.1016/j.heliyon.2024.e38236
Tengfei Shen, Wenbin Liu, Taiyong Chen, Xiaohui Shen • Electronic Journal of Differential Equations
(2014)
In this article, we consider the multi-point boundary-value problem
for nonlinear fractional differential equations with $p$-Laplacian operator:
$$\displaylines{
D_{0^+}^\beta \varphi_p (D_{0^+}^\alpha u(t))
= f(t,u(t),D_{0^+}^{\alp...
DOAJ
Open Access (DOAJ)
Manel Alaya, Hanen Damak, Nizar Hadj Taieb, Mohamed Ali Hammami • Archives of Control Sciences
(2024)
In this paper, a particular form of practical ℎ-observers for piecewise continuous Lipschitz, one-sided piecewise continuous Lipschitz systems and quasi-one-sided piecewise continuous Lipschitz systems is extended to nonlinear non-autonomou...
DOAJ
Open Access (DOAJ)
DOI: https://doi.org/10.24425/acs.2024.153106
Jianjun Cao, Bailing An, Enran Hou, Fuzhang Wang • Frontiers in Physics
(2026)
This study presents a novel local meshless approach for solving one-dimensional Fisher’s equation, combining a local scheme, Gaussian radial basis functions (G-RBF), and a collocation technique. The method leverages the Gaussian basis’s non...
DOAJ
Open Access (DOAJ)
DOI: 10.3389/fphy.2026.1792548