Results 11 to 20 of about 74 (40)

Development of the ring ZhYTsD 712442.021 production process including the study of ring workpieces turning process [PDF]

, 2021
У кваліфікаційній роботі розроблено технологію виготовлення кільця ЖИЦД 712442.021 та спеціальні верстатні пристрої для її реалізації. Прийняті в кваліфікаційній роботі інженерні рішення дали змогу підвищити якість виготовлення деталі і зменшити ...
Elkenani, Moustafa Mohamed Mahmoud Hassan, Елькенані, Мустафа Мохамед Махмуд Хассан   +1 more
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A note on stability of the vertical uniform rotations of the heavy top

, 2012
We prove that the stability problem of a vertical uniform rotation of a heavy top is completely solved by using the linearization method and the conserved quantities of the differential system which describe the rotation of the heavy ...
Comanescu, Dan
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Nonlinear stability of elliptic equilibria in Hamiltonian systems with exponential time estimates [PDF]

, 2021
In the framework of nonlinear stability of elliptic equilibria in Hamiltonian systems with n degrees of freedom we provide a criterion to obtain a type of formal stability, called Lie stability.
Cárcamo Díaz, Daniela Jacqueline, Palacián Subiela, Jesús Francisco, Vidal Díaz, Claudio, Yanguas Sayas, Patricia   +3 more
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Existence and Stability of Symmetric Periodic Simultaneous Binary Collision Orbits in the Planar Pairwise Symmetric Four-Body Problem

, 2011
We extend our previous analytic existence of a symmetric periodic simultaneous binary collision orbit in a regularized fully symmetric equal mass four-body problem to the analytic existence of a symmetric periodic simultaneous binary collision orbit in a
A. Chenciner, A. Sivasankaran, A. Venturelli, C. Moore, C. Simó, Duokui Yan, G. Contopoulos, G.E. Roberts, G.E. Roberts, J. Hietarinta, J. Schubart, K.R. Meyer, K.R. Meyer, L.F. Bakker, Lennard F. Bakker, M. Hénon, M. Sekiguchi, M.M. Saito, M.M. Saito, M.M. Saito, R. Martinez, R. Moeckel, S.J. Aarseth, Skyler Simmons, T. Ouyang, T. Ouyang, Tiancheng Ouyang, W.L. Sweatman, W.L. Sweatman, X. Hu, X. Hu   +30 more
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Stability of equilibrium states in the Zhukovski case of heavy gyrostat using algebraic methods

, 2011
We study the stability of the equilibrium points of a skew product system. We analyze the possibility to construct a Lyapunov function using a set of conserved quantities and solving an algebraic system.
Aeyels, Birtea, Birtea, Comănescu, Gavrilov, Guirao Juan, Marsden, Puta, Rouche, Vera, Vera, Wittenburg   +11 more
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Relative periodic orbits in point vortex systems

, 2004
We give a method to determine relative periodic orbits in point vortex systems: it consists mainly into perform a symplectic reduction on a fixed point submanifold in order to obtain a two-dimensional reduced phase space.
Aref H, Aref H, Aref H, F Laurent-Polz, Helmholz H, Laurent-Polz F, Laurent-Polz F, Laurent-Polz F, Laurent-Polz F, Marsden J, Ortega J-P, Ortega J-P, Palais R, Pekarsky S   +13 more
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The reduction on the linear stability of elliptic Euler-Moulton solutions of the n-body problem to those of 3-body problems

, 2016
In this paper, we consider the elliptic collinear solutions of the classical $n$-body problem, where the $n$ bodies always stay on a straight line, and each of them moves on its own elliptic orbit with the same eccentricity.
Long, Yiming, Zhou, Qinglong
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Point vortices on the sphere: a case with opposite vorticities

, 2001
We study systems formed of 2N point vortices on a sphere with N vortices of strength +1 and N vortices of strength -1. In this case, the Hamiltonian is conserved by the symmetry which exchanges the positive vortices with the negative vortices.
, Aref H, Aref H, Bogomolov V, Chossat P, F Laurent-Polz, Glasser L, Golubitsky M, Helmholtz H, Kidambi R, Lerman E, Marsden J, Marsden J, Marsden J, Michel L, Montaldi J, Montaldi J, Ortega J-P, Palais R, Patrick G, Polvani L, Saffman P, Serre J-P, Simo J, Tokieda T Tourbillons dansants   +24 more
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Morse index and linear stability of the Lagrangian circular orbit in a three-body-type problem via index theory

, 2015
It is well known that the linear stability of the Lagrangian elliptic solutions in the classical planar three-body problem depends on a mass parameter $\beta$ and on the eccentricity $e$ of the orbit.
Barutello, Vivina, Jadanza, Riccardo D., Portaluri, Alessandro   +2 more
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Some stability results on nearly–integrable systems (with dissipation) [PDF]

, 2012
The stability of nearly–integrable systems can be studied over different time scales and with different techniques. In this paper we review some classical methods, like the averaging technique, the classical perturbation theory, KAM theorem and ...
Celletti, Alessandra
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