Results 1 to 10 of about 792,098 (298)

A Two-Level Optimization Method for Hypersonic Periodic Cruise Trajectory

International Journal of Aerospace Engineering, 2021
Periodic cruise has the potential to improve the fuel-saving efficiency of hypersonic cruise vehicle but is difficult to optimize. In this paper, a two-level optimization method for the trajectory of periodic cruise is proposed.
Hesong Li, Yi Wang, Yunfan Zhou, Shangcheng Xu, Dan Su   +4 more
doaj   +1 more source

Generalized isocline method of plotting phase-plane trajectories [PDF]

IEEE Transactions on Automatic Control, 1965
By considering simultaneously the N-x (or the N-\dot{x} ), where N=d\dot{x}/dx and the \dot{x}-x planes, second order non-linear autonomous systems (not easily amendable to the existing methods) described by the differential equation \ddot{x}=F(x, \dot{x}) can be studied.
Deekshatulu, BL, Murthy, ISN
openaire   +2 more sources

Anomalous Indoor Human Trajectory Detection Based on the Transformer Encoder and Self-Organizing Map

IEEE Access, 2023
Anomalous human trajectory detection is a critical task in security surveillance in working areas. To identify anomalous human trajectories, understanding features of their movement plays an important role.
Doi Thi Lan, Seokhoon Yoon
doaj   +1 more source

A Real-Time Trajectory Optimization Method for Hypersonic Vehicles Based on a Deep Neural Network

Aerospace, 2022
Considering the high-efficient trajectory planning requirements for hypersonic vehicles, this paper proposes a real-time trajectory optimization method based on a deep neural network.
Jianying Wang, Yuanpei Wu, Ming Liu, Ming Yang, Haizhao Liang   +4 more
doaj   +1 more source

Trajectory-free approximation of phase space structures using the trajectory divergence rate [PDF]

Nonlinear Dynamics, 2019
18 pages, 15 ...
Gary K. Nave, Peter J. Nolan, Shane D. Ross   +2 more
openaire   +3 more sources

Bohmian trajectories and quantum phase space distributions [PDF]

Physics Letters A, 2002
12 pages, to appear in Phys.
Dias, Nuno Costa, Prata, João Nuno
openaire   +2 more sources

Классическая математическая модель С.В. Дубовского и ее некоторые модификации для описания К-волн в экономике

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
В настоящей работе была исследована классическая математическая модель С.В. Дубовского для описания длинных волн Н.Д. Кондратьева (К-волн). Эта модель описывает динамику свободных колебаний эффективности новых технологий и эффективности фондоотдачи.
Макаров, Д.В.
doaj   +1 more source

Dimension of Phase Point Trajectory

International Journal of Modern Nonlinear Theory and Application, 2015
In a physical system, phase point trajectory is impossible to be space-filling curve, of which the dimension is not greater than one. Equipotential map concept is proposed. When phase point trajectory dimension is 0, calculus tool is no longer applicable. System state can be changed instantly.
openaire   +2 more sources

Математическая модель дробного осциллятора Ван дер Поля-Эйри

Vestnik KRAUNC: Fiziko-Matematičeskie Nauki
В работе предложена математическая модель нелинейного осциллятора Ван дер Поля-Эйри с учетом наследственности. Нелинейность осциллятора обусловлена наличием зависимости коэффициента трения от квадрата функции смещения, что характерно для осциллятора Ван ...
Салимова, А.И., Паровик, Р.И.   +1 more
doaj   +1 more source

Dubovsky’s Class of Mathematical Models for Describing Economic Cycles with Heredity Effects

Fractal and Fractional
The article is devoted to the study of economic cycles and crises, which are studied within the framework of the theory of N.D. Kondratiev long waves (K-waves). The object of the study is the fractional mathematical models of S. V.
Danil Makarov, Roman Parovik, Zafar Rakhmonov   +2 more
doaj   +1 more source