Results 31 to 40 of about 77,815 (315)
Inverse Problem In Optical Tomography Using Diffusion Approximation and Its Hopf-Cole Transformation [PDF]
Journal of Systemics, Cybernetics and Informatics, 2003 In this paper, we derive the Hopf-Cole transformation to the diffusion approximation. We find the analytic solution to the one dimensional diffusion approximation and its Hopf-Cole transformation for a homogenous constant background medium.
Taufiquar R. Khan
doaj
A new model approximating M/PH/1 queuing systems during the transient period
Mathematical Modelling and Analysis, 2001 This paper presents an efficient approximation for M/PH/1 queuing systems based on the replacement of the majority of the vector valued state probabilities by a diffusion approximation. The strength of the new approximation is that it gives more accurate
H. Gao, M. A. M. Lynch
doaj +1 more source
Diffusion approximation of recurrent schemes for financial markets, with application to the Ornstein-Uhlenbeck process [PDF]
Opuscula Mathematica, 2015 We adapt the general conditions of the weak convergence for the sequence of processes with discrete time to the diffusion process towards the weak convergence for the discrete-time models of a financial market to the continuous-time diffusion model ...
Yuliya Mishura
doaj +1 more source
Image compression with anisotropic diffusion [PDF]
, 2008 Compression is an important field of digital image processing where well-engineered methods with high performance exist. Partial differential equations (PDEs), however, have not much been explored in this context so far. In our paper we introduce a novel
Welk, Martin +19 more
core +1 more source
Mathematics, 2020 In this paper we propose and compare two methods to optimize the numerical computations for the diffusion term in a nonlocal formulation for a reaction-diffusion equation.
Mitică CRAUS, Silviu-Dumitru PAVĂL
doaj +1 more source
Diffusion effects in undulator radiation
Physical Review Special Topics. Accelerators and Beams, 2014 Quantum diffusion effects in undulator radiation in semiclassical approximation are considered. Short-term effects on the electron beam motion are discussed and it is shown that approaches based on diffusion approximation with drift-diffusion ...
Ilya Agapov, Gianluca Geloni
doaj +1 more source
On Local Linear Approximations to Diffusion Processes [PDF]
International Journal of Mathematics and Mathematical Sciences, 2011 Diffusion models have been used extensively in many applications. These models, such as those used in the financial engineering, usually contain unknown parameters which we wish to determine. One way is to use the maximum likelihood method with discrete samplings to devise statistics for unknown parameters.
Duan, X, Qian, Z, Zheng, W
openaire +2 more sources
Structural insights into an engineered feruloyl esterase with improved MHET degrading properties
FEBS Letters, EarlyView.A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa +5 more
wiley +1 more source
Particle approximation of the Wasserstein diffusion
Journal of Functional Analysis, 2010 We construct a system of interacting two-sided Bessel processes on the unit interval and show that the associated empirical measure process converges to the Wasserstein Diffusion, assuming that Markov uniqueness holds for the generating Wasserstein Dirichlet form.
Andres, Sebastian, von Renesse, Max-K.
openaire +2 more sources
FEBS Letters, EarlyView.Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas +3 more
wiley +1 more source