Results 31 to 40 of about 659,787 (293)

Exploring the behavior feature of complex trajectories of ships with Fourier transform processing: a case from fishing vessels

Frontiers in Marine Science, 2023
The significant uncertainty and complexity of vessels at sea poses challenges for regulatory bodies in the fishing industry. This paper presents a method for identifying fishing vessel trajectory characteristics involving the Fourier series transform ...
Qinghua Zhu, Yongtao Xi, Shenping Hu, Yan Chen   +3 more
doaj   +1 more source

Confining and escaping magnetic field lines in tokamaks: Analysis via symplectic maps

Fundamental Plasma Physics, 2023
In magnetically confined plasma, it is possible to qualitatively describe the magnetic field configuration via phase spaces of suitable symplectic maps.
Matheus S. Palmero, Iberê L. Caldas
doaj   +1 more source

Dynamics of cosmological models with nonlinear classical phantom scalar fields. II. Qualitative analysis and numerical modeling

, 2019
A detailed qualitative analysis and numerical modeling of the evolution of cosmological models based on nonlinear classical and phantom scalar fields with self-action are performed.
Agathonov, A. A., Ignat'ev, Yu. G.
core   +1 more source

Selkov’s Dynamic System of Fractional Variable Order with Non-Constant Coefficients

Mathematics
This article uses an approach based on the triad model–algorithm–program. The model is a nonlinear dynamic Selkov system with non-constant coefficients and fractional derivatives of the Gerasimov–Caputo type.
Roman Parovik
doaj   +1 more source

Lyapunov instability of fluids composed of rigid diatomic molecules

, 1996
We study the Lyapunov instability of a two-dimensional fluid composed of rigid diatomic molecules, with two interaction sites each, and interacting with a WCA site-site potential. We compute full spectra of Lyapunov exponents for such a molecular system.
A. Lambert, A. Wolf, András Baranyai, B. J. Alder, Ch. Dellago, Ch. Dellago, Ch. Dellago, D. J. Evans, D. J. Evans, D. Ruelle, G. Benettin, G. Benettin, H. A. Posch, H. A. Posch, H. A. Posch, H. A. Posch, H. A. Posch, I. Goldhirsch, I. Shimada, István Borzsák, J. P. Eckmann, M. D'Alessandro, S. Sarman, V. I. Arnold, V. I. Oseledec, W. E. Wiesel, W. G. Hoover, W. G. Hoover   +27 more
core   +1 more source

Two-phase framework for optimal multi-target Lambert rendezvous

, 2017
This paper proposes a two-phase framework to solve an optimal multi-target Lambert rendezvous problem. The first phase solves a series of single-target rendezvous problems for all departure-arrival object pairs to generate the elementary solutions, which
Ahn, Jaemyung, Bang, Jun
core   +1 more source

Deschampsia antarctica population dynamics given the trends in air temperature and penguin activity

Український антарктичний журнал
The main objective of the study is to describe the dynamics of the total size of Deschampsia antarctica population of Galindez Island, Argentine Islands, the maritime Antarctic, during 1964–2021, both in total and as eight sectoral groups of populations ...
Nataliia Miryuta, Denys Pishniak, Valentyna Malanchuk, Anton Puhovkin, Ivan Parnikoza   +4 more
doaj   +1 more source

Attractor Behavior of Phantom Cosmology

, 2005
We investigate the cosmological attractor of the minimally coupled, self-interacting phantom field with a positive energy density but negative pressure.
Aguirregabiria, Barrow, Bastero-Gil, Caldwell, Caldwell, Carroll, Chiba, Dabrowski, Frampton, Gibbons, Guo, Guo, Guo, Guo, Kehagias, Liddle, Lidsey, Meng, Mersini, Nojiri, Nojiri, Piao, Piao, Pollock, Sami, Schulz, Singh, Torres, Yuan-Zhong Zhang, Yun-Song Piao, Zong-Kuan Guo   +30 more
core   +1 more source

Sirolimus for Extracranial Arteriovenous Malformations: A Scoping Review of the Evidence in Syndromic and Non‐Syndromic Cases

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Arteriovenous malformations (AVMs) are rare, high‐flow, vascular anomalies that can occur either sporadically or as part of a genetic syndrome. AVMs can progress with serious morbidity and even mortality if left unchecked. Sirolimus is an mTOR inhibitor that is effective in low‐flow vascular malformations; however, its role in AVMs is unclear.
Will Swansson, Ingrid Winship, Gary Hammerschlag, Laura Scardamaglia   +3 more
wiley   +1 more source

ON BEHAVIOR OF TRAJECTORIES OF WEAK SOLUTIONS OF N-DIMENSIONAL STOCHASTIC NAVIER-STOKES EQUATIONS

Российский технологический журнал, 2017
The research paper study a behavior of trajectories of weak solutions of n-dimensional (n≥2) Navier-Stokes equations, perturbed by an additive white noise. It is shown that at any given moment t trajectories in its subsequent motion along the phase space
D. A. Khrychev
doaj   +1 more source