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第二届IMA非线性和相干结构会议（2nd IMA Conference on Nonlinearity and Coherent Structures）
第二届 IMA非线性和相干结构 会议
2017/4/24
Nonlinearity plays an important role in many fields of Science, Engineering and Technology.The aim of this conference is to bring together researchers working on aspects of nonlinear phenomena and to ...
NON-SQUARE BLIND SOURCE SEPARATION UNDER COHERENT NOISE BY BEAMFORMING AND TIME-FREQUENCY MASKING
NON-SQUARE BLIND SOURCE SEPARATION COHERENT NOISE BY BEAMFORMING TIME-FREQUENCY MASKING
2015/9/29
To be applicable in realistic scenarios, blind source separation approaches should deal evenly with non-square cases and the presence of noise. We consider an additive noisemixing model with an arbitr...
Two-subspace Projection Method for Coherent Overdetermined Systems (Technical Report)
Two-subspace Projection Method Coherent Overdetermined Systems Technical Report Numerical Analysis
2012/4/17
In this technical report we present a Projection onto Convex Sets (POCS) type algorithm for solving systems of linear equations. POCS methods have found many applications ranging from computer tomogra...
Two-subspace Projection Method for Coherent Overdetermined Systems
Two-subspace Projection Method Coherent Overdetermined Systems Numerical Analysis Probability
2012/4/17
We present a Projection onto Convex Sets (POCS) type algorithm for solving systems of linear equations. POCS methods have found many applications ranging from computer tomography to digital signal and...
现金流上的Coherent风险度量
Coherent风险度量 现金流 表示定理
2013/10/19
本文讨论现金流情形下的Coherent风险度量的表示定理,给出了初始时刻的Coherent风险度量的表示定理,还给出了现金流期内任一时刻t的Ft-Coherent风险度量的表示定理.
Homotopy coherent diagrams and approximate fibrations
Approximate fibration homotopy coherence ENR
2011/9/21
Abstract: Let p be a fibration over a finite simplicial complex, whose fibers have the homotopy type of finite simplicial complexes. Then p is equivalent to an approximate fibration whose total space ...
Coherent discrete embeddings for Lagrangian and Hamiltonian systems
Lagrangian systems Hamiltonian systems variational integrators discrete embeddings numerical schemes
2011/8/25
Abstract: The general topic of the present paper is to study the conservation for some structural property of a given problem when discretising this problem. Precisely we are interested with Lagrangia...
Coherent vortex structures and 3D enstrophy cascade
Coherent vortex structures 3D enstrophy cascade
2011/8/22
Abstract: Existence of 2D enstrophy cascade in a suitable mathematical setting, and under suitable conditions compatible with 2D turbulence phenomenology, is known both in the Fourier and in the physi...
Detecting coherent structures using braids
topological chaos dynamical systems Lagrangian coherent structures
2011/7/5
The detection of coherent structures is an important problem in
uid dynamics,
particularly in geophysical applications. For instance, knowledge of how regions of
uid are isolated from each other...
Ordering of small particles in one-dimensional coherent structures by time-periodic flows
time-periodic flows small particles Ordering one-dimensional coherent structures
2011/7/7
Small particles transported by a fluid medium do not necessarily have to follow the flow. We show that for a wide class of time-periodic incompressible flows inertial particles have a tendency to spon...
Coherent potential approximation for disordered bosons
Coherent potential disordered bosons
2011/2/25
A family of random models for bosonic quasi-particle excitations, e.g. the vibrations of a disordered solid, is introduced. The generator of the linearized phase space dynamics of these models is the ...
On construction of coherent states associated with homogeneous spaces
Locally compact abelian group Semidirect product Fourier transform Square integrable representation Coherent states
2010/12/21
In this article, assume that G=H\timest K is the semidirect product of two locally compact groups H and K, respectively and consider the quasi regular representation on G. Then for some closed subgrou...
Non-coherent Components of the Toric Hilbert Scheme
Non-coherent Components Toric Hilbert Scheme
2010/12/9
We want to understand the geometry of all irreducible components of the toric Hilbert scheme. Until now it is known that the coherent component is (up to normalisation)the toric variety associated to ...
Coherent Structures and Carrier Shocks in the Nonlinear Periodic Maxwell Equations
Coherent Structures Carrier Shocks Nonlinear Periodic Maxwell Equations
2010/12/15
We consider the one-dimensional propagation of electromagnetic waves in a weakly nonlinear
and low-contrast spatially inhomogeneous medium with no energy dissipation. We focus on the case of a period...
On the Hall algebra of coherent sheaves on P^1 over F_1
Hall algebra coherent sheaves P^1 over F_1
2010/12/8
Using a model of schemes over F1 in the spirit of Deitmar and Haran, we study the categoryCoh(P1) of coherent sheaves onP1 overF1. This category resembles in most ways a finitary abelian category, but...