Results 21 to 30 of about 153,856 (313)

Research and development theory methods and models for forecasting time series with insurance increments

open access: yesНовые технологии, 2019
The most actively developing area of the Russian economy is insurance. 213 insurance companies practicing in Russia have permission to provide insurance services for 2019.
K. A. Kovaleva, I. M. Yakhontova
doaj   +1 more source

The Classical Action as a Tool to Visualise the Phase Space of Hamiltonian Systems

open access: yesDynamics, 2023
In this paper, we analyse the classical action as a tool to reveal the phase space structure of Hamiltonian systems simply and intuitively. We construct a scalar field using the values of the action along the trajectories to analyse the phase space.
Francisco Gonzalez Montoya
doaj   +1 more source

The existence of chaotic regimes of the fractional analogue of the Duffing-type oscillator

open access: yesVestnik Samarskogo Gosudarstvennogo Tehničeskogo Universiteta. Seriâ: Fiziko-Matematičeskie Nauki, 2019
In this paper, we study the chaotic regimes of the fractional Duffing oscillator. To do this, using the Wolf algorithm with Gram-Schmidt orthogonalization, we calculated the spectra of maximum Lyapunov exponents depending on the values of the control ...
Roman Ivanovich Parovik
doaj   +1 more source

Accelerating dual cardiac phase images using undersampled radial phase encoding trajectories [PDF]

open access: yesMagnetic Resonance Imaging, 2016
A three-dimensional dual-cardiac-phase (3D-DCP) scan has been proposed to acquire two data sets of the whole heart and great vessels during the end-diastolic and end-systolic cardiac phases in a single free-breathing scan. This method has shown accurate assessment of cardiac anatomy and function but is limited by long acquisition times.
Karis Letelier   +6 more
openaire   +5 more sources

Identifying reaction pathways in phase spaceviaasymptotic trajectories [PDF]

open access: yesPhysical Chemistry Chemical Physics, 2020
The asymptotic trajectories indicate the edge of the reaction pathway.
Yutaka Nagahata   +3 more
openaire   +3 more sources

Control of designed target seeker, used in self-guided anti-aircraft missiles, by employing motors with a constant torque

open access: yesAviation, 2014
This paper presents the results of research on control of a designed target seeker (Gapiński, D. 2008), which was carried out using of the so-called “signum” function. The technical feasibility of controlling the seeker axis in the phase of searching the
Daniel Gapiński, Konrad Stefański
doaj   +1 more source

Quantifying measurement-induced quantum-to-classical crossover using an open-system entanglement measure

open access: yesPhysical Review Research, 2023
The evolution of a quantum system subject to measurements can be described by stochastic quantum trajectories of pure states. Instead, the ensemble average over trajectories is a mixed state evolving via a master equation.
Christian Carisch   +2 more
doaj   +1 more source

Controlling multiple returnings in non-sequential double ionization with orthogonal two-color laser pulses

open access: yesFrontiers in Physics, 2023
With the three-dimensional semi-classical ensemble model, we studied the non-sequential double ionization by orthogonal two-color laser pulses. Our calculations show that the proportion of events experiencing multiple returnings, the sum of the final ...
Xiaomeng Ma   +4 more
doaj   +1 more source

Automatic Vehicles’ Trajectories Optimization on Highway Exclusive Lanes

open access: yesJournal of Advanced Transportation, 2022
The rapid development of V2X communication has made it possible to optimize and control the trajectories of vehicles from the whole traffic flow’s perspective and improve traffic performance.
Lingjuan Chen, Yangbo Ruan, Yiquan Gou
doaj   +1 more source

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

open access: yesFrontiers 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   +3 more
doaj   +1 more source

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