搜索结果: 1-15 共查到“应用数学 phase”相关记录15条 . 查询时间(0.09 秒)
Phase-field model for reconstructed stepped surface
Phase-field model reconstructed stepped surface
2015/10/16
We formulate a phase-field, or diffuse-interface, model for the evolution of stepped surfaces under surface diffusion in the presence of distinct material parameters across nanoscale terraces. In the ...
MICROPHONE ARRAY SPEECH ENHANCEMENT BY BAYESIAN ESTIMATION OF SPECTRAL AMPLITUDE AND PHASE
MICROPHONE ARRAY SPEECH ENHANCEMENT BAYESIAN ESTIMATION SPECTRAL AMPLITUDE AND PHASE
2015/9/29
Microphone arrays provide new opportunities for noise reduction and speech enhancement. This paper presents anovel decomposition of the estimation problems for short-time spectral amplitude (STSA), lo...
Fast Algorithms for Signal Reconstruction without Phase
Frames mutually unbiased bases equiangular frames projective 2-designs discrete chirps
2015/9/29
We derive fast algorithms for doing signal reconstruction without phase. This type of problem is important insignal processing, especially speech recognition technology, and has relevance for state to...
On signal reconstruction without phase
Frame Signal reconstruction Phase Speech recognition
2015/9/29
We will construct new classes of Parseval frames for a Hilbert space which allow signal reconstruction from theabsolute value of the frame coefficients. As a consequence, signal reconstruction can be ...
Fast geodesics computation with the phase flow method
Geodesics Weighted geodesics Geodesic flow The phase flow method Manifolds Tangent bundles Charts Surface parameterization Spline interpolation
2015/7/14
This paper introduces a novel approach for rapidly computing a very large number of geodesics on a smooth surface.The idea is to apply the recently developed phase flow method [L. Ying, E.J. Cande `s,...
Asymptotic ergodicity of the eigenvalues of random operators in the localized phase
Asymptotic ergodicity eigenvalues of random operators localized phase
2011/1/18
We prove that, for a general class of random operators, the family of the unfolded eigenvalues in the localization region is asymptotically ergodic in the sense of N. Minami (see [24]). N. Minami conj...
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...
On dynamical systems and phase transitions for $Q+1$-state $P$-adic Potts model on the Cayley tree
dynamical systems phase transitions
2010/11/11
In the present paper, we introduce a new kind of $p$-adic measures for $q+1$-state Potts model, called {\it $p$-adic quasi Gibbs measure}. For such a model, we derive a recursive relations with respe...
Oriented Site Percolation, Phase Transitions and Probability Bounds
Oriented site percolation Critical probability Phase transition Positive term power series
2008/6/27
We show that one half is a lower bound for the critical probability of an oriented site percolation process of Grimmett and Hiemer. This value improves the known lower bound of one third. We employ an...
A split-radix DCT base structure for linear phase paraunitary filter banks
discrete cosine transform lapped transform split radix algorithm
2010/9/15
In this study, base on traditional lapped transform’s properties, inherit from some of
the special characteristic properties of discrete cosine transform, trigonometric
identities and the structure ...
A phase-field model for the paraelectric-ferroelectric transition
Ferroelectricity Phase transition Evolution equations
2010/9/16
The purpose of the paper is to model the nonlinear relation characterizing the ferroelectric properties of polycrystals and to frame the paraelectric-ferroelectric transition as a classical transition...
Unified approach to evolution equations for non-isothermal phase transitions
Evolution equation Phase field Non-isothermal transitions
2010/9/15
The purpose of the paper is to set up a scheme which embodies and generalizes a wide class of phase-transition models and, moreover, provides a direct approach which avoids ad-hoc assumptions. The sta...
In this paper, the existence of a global periodic attractor for a third-order phase-lockedloop with tangential phase detector characteristic and frequency modulation input is provedunder some conditio...
The Modified Upwind Finite Difference Fractional Steps Method for Compressible Two-phase Displacement Problem
Two-phase displacement two-dimensional compressibility modified upwind finite difference fractional steps method convergence
2007/12/11
For compressible two-phase displacement problem, themodified upwind finite difference fractional steps schemes are putforward. Some techniques, such as calculus of variations,commutative law of multip...
Stability and Existence of Multidimensional Subsonic Phase Transitions
multidimensional subsonic phase transitions
2007/12/10
The purpose of this paper is to prove the uniform stability of multidimensional subsonic phase transitions satisfying the viscosity-capillarity criterion in a van der Waals fluid, and further to estab...