搜索结果: 1-15 共查到“数学 instability”相关记录21条 . 查询时间(0.135 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Homological instability for the moduli space of smooth 4-manifolds
光滑 4-流形模空间 同调不稳定性
2023/5/5
The moduli space of a smooth manifold X is defined to be the classifying space of its diffeomorphism group. Understanding the cohomology group of this space is important because elements in this group...
Global instability in the elliptic restricted three body problem
Elliptic Restricted Three Body problem Arnold diffusion splitting of separatrices Melnikov integral
2015/9/25
The (planar) ERTBP describes the motion of a massless particle (a comet) under the gravitational field of two massive bodies (the primaries, say the Sun and Jupiter) revolving around their center of m...
A note on micro-instability for Hamiltonian systems close to integrable
micro-instability Hamiltonian systems close to integrable
2015/9/25
In this note, we consider the dynamics associated to a perturbation of an integrable Hamiltonian system in action-angle coordinates in any number of degrees of freedom and we prove the following resul...
ASB/ISB award paper Manipulating the edge of instability
Feedback Motor control Time-delay Hand Biomechanics
2015/8/25
We investigate the integration of visual and tactile sensory input for dynamic manipulation. Our experimental data and computational
modeling reveal that time-delays are as critical to task-optimal m...
A test of numerical instability and stiffness in the parametrizations of the ARPEGE and ALADIN models
numerical instability stiffness
2014/12/12
Meteorological numerical weather prediction
(NWP) models solve a system of partial differential equations in time and space.
Systems with large flexible server pools: Instability of "natural" load balancing
Systems large flexible server pools Instability of "natural" load balancing
2011/2/22
We consider general large-scale service systems with multiple customer classes and multiple server (agent) pools; mean service times depend both on the customer class and server pool. It is assumed th...
Exponential instability in the Gel'fand inverse problem on the energy intervals
Exponential instability Gel'fand inverse problem energy intervals
2011/1/20
We consider the Gel’fand inverse problem and continue studies of [Mandache,2001].We show that the Mandache-type instability remains valid even in the case of Dirichletto-Neumann map given on the energ...
Exponential instability in the inverse scattering problem on the energy interval
Exponential instability inverse energy interval
2011/2/28
We consider the inverse scattering problem on the energy interval in three dimensions.We are focused on stability and instability questions for this problem. In particular,we prove an exponential inst...
Exponential self similar solutions technique for instability phenomenon arising in double phase flow through porous medium with capillary pressure
Immiscible fluid Instability Flows in porous media
2010/9/25
The theoretical studies involved development of the differential equations which describe the instability of water by an oil-saturated rock. The basic assumption underlying the present investigation i...
Transverse instability for periodic waves of KP-I and Schrödinger equations
transverse instability periodic traveling waves KP-I equation Schr¨odinger equation
2011/1/21
We consider the quadratic and cubic KP - I and NLS models in 1+2 dimensions with periodic boundary conditions. We show that the spatially periodic travelling waves (with period
K) in the form u(t, x,...
Lattice Boltzmann study on Kelvin-Helmholtz instability: the roles of velocity and density gradients
Soft Condensed Matter (cond-mat.soft) Cellular Automata and Lattice Gases (nlin.CG) Computational Physics (physics.comp-ph) Plasma Physics (physics.plasm-ph)
2010/11/10
A two-dimensional lattice Boltzmann model with 19 discrete velocities for compressible Euler equations is proposed (D2V19-LBM). The fifth-order Weighted Essentially Non-Oscillatory (5th-WENO) finite d...
Development of instability of dark solitons generated by a flow of Bose-Einstein condensate past a concave corner
Pattern Formation and Solitons (nlin.PS) Quantum Gases (cond-mat.quant-gas)
2010/11/10
The stability of dark solitons generated by a supersonic flow of a Bose-Einstein condensate past a concave corner (or a wedge) is studied. It is shown that solitons in the dispersive shock wave genera...
Completely integrable Hamiltonian systems with weak Lyapunov instability or all periodic orbits on non-compact level sets
Completely integrable Hamiltonian system weak Lyapunov instability or all periodic orbits non-compact level sets
2010/12/1
The aim of this paper is to introduce a class of Hamiltonian autonomous systems in dimension 4 which are completely integrable and their dynamics is described in all details.
Nonlinear instability of linearly unstable standing waves for nonlinear Schrödinger equations
Nonlinear instability linearly unstable standing waves nonlinear Schrö dinger equations
2010/12/13
We study the instability of standing waves for nonlinear Schr¨odinger equations. Under a general assumption on nonlinearity, we prove that linear instability implies orbital instability in any dimensi...
Critical Magnetic Number in the MHD Rayleigh-Taylor instability
Rayleigh-Taylor instability MHD free boundary problem critical number
2010/12/14
We reformulate in Lagrangian coordinates the two-phase free boundary problem for the equations of Magnetohydrodynamics in a infinite slab, which is incompressible, vis-cous and of zero resistivity, as...