نتایج جستجو برای: center manifold

تعداد نتایج: 312100  

Journal: :Transactions of the Society of Instrument and Control Engineers 2009

Journal: :SIAM J. Applied Dynamical Systems 2012
Maciej J. Capinski Pablo Roldán

We present a method of proving existence of center manifolds within specified domains. The method is based on a combination of topological tools, normal forms, and rigorous computer-assisted computations. We apply our method to obtain a proof of a center manifold in an explicit region around the equilibrium point L1 in the Earth–Sun planar restricted circular three-body problem.

ژورنال: تحقیقات موتور 2019
, ,

Design of exhaust manifold is important due to its effects on performance of catalyst, thermal and thermo- mechanical loads. In this paper, first transient analysis of fluid was carried out with FLUENT software, then time-average temperature and heat transfer coefficient contour for three cycle were mapped on inner surface of exhaust manifold with MATLAB software for thermomechanical analysis. ...

Journal: :Applied Mathematics and Computation 2013
Yuting Ding Weihua Jiang Pei Yu

Keywords: Neutral delayed differential equation Double Hopf bifurcation Normal form Multiple time scales Center manifold reduction a b s t r a c t In this paper, we study dynamics in a container crane model with delayed position feedback , with particular attention focused on non-resonant double Hopf bifurcation. By using multiple time scales and center manifold reduction methods, we obtain the...

Journal: :Linear Algebra and its Applications 2021

This paper concerns the minimax center of a collection linear subspaces. For k-dimensional subspaces an n-dimensional vector space, this can be cast as finding minimum enclosing ball on Grassmann manifold. differing dimension, setting becomes disjoint union Grassmannians rather than single manifold, and problem is no longer well-defined. However, natural geometric maps exist between these manif...

Journal: :bulletin of the iranian mathematical society 2015
x. chen r. yan

in this paper‎, ‎the‎ ‎authors prove that a strictly kähler-berwald manifold with‎ ‎nonzero constant holomorphic sectional curvature must be a‎ kähler manifold‎.

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده علوم ریاضی و مهندسی کامپیوتر 1392

هدف از این پایان نامه تعمیم قضایای بوهلر (1969)، هید (1971) و هید - براون (1971) در یک فرایند شاخه ای با محیط تصادفی است. برای فرایند شاخه ای $ lbrace z_{n} brace _ {ngeq0 } $ ، با فرض $ z_{0}=1 $ و $ m= e(z_{1}) in (0,infty) $، می دانیم $ w_{n}=z_{n}/m^{n} $ یک مارتینگل نامنفی و تقریبا مطمئن به متغیر تصادفی $ w_{infty} $ همگراست. برای نرخ همگرایی این مارتینگل، هید و بوهلر به ترتیب نتیجه گرف...

Journal: :SIAM Review 2009
Margaret Beck C. Eugene Wayne

The large-time behavior of solutions to the Burgers equation with small viscosity is described using invariant manifolds. In particular, a geometric explanation is provided for a phenomenon known as metastability, which in the present context means that solutions spend a very long time near the family of solutions known as diffusive N-waves before finally converging to a stable self-similar dif...

Journal: :SIAM J. Applied Dynamical Systems 2005
Stella Abreu Philip Aston Ian Melbourne

We study a codimension two steady-state/steady-state mode interaction with D4 symmetry, where the center manifold is three-dimensional. Primary branches of equilibria undergo secondary Hopf bifurcations to periodic solutions which undergo further bifurcations leading to chaotic dynamics. This is not an exponentially small effect, and the chaos obtained in simulations using DsTool is large-scale...

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