Results 71 to 80 of about 436,828 (182)

Comparative study of ground-based and satellite observations of Pc5 geomagnetic pulsations during solar cycle 23

open access: yesDiscover Space
Pc5 geomagnetic pulsations (PGPs) are ultra-low frequency (ULF) waves within the 1–7 mHz frequency band observed both in space and on the ground. PGPs offer versatile methods for studying the interaction between the magnetosphere and ionosphere in space.
Sebwato Nasurudiin   +4 more
doaj   +1 more source

Optimal Transport Filtering with Particle Reweighing in Finance

open access: yes, 2017
We show the application of an optimal transportation approach to estimate stochastic volatility process by using the flow that optimally transports the set of particles from the prior to a posterior distribution.
Douady, Raphael, Miryusupov, Shohruh
core  

Stability of Matrix Polytopes with a Dominant Vertex and Implications for System Dynamics

open access: yesAbstract and Applied Analysis, 2013
The paper considers the class of matrix polytopes with a dominant vertex and the class of uncertain dynamical systems defined in discrete time and continuous time, respectively, by such polytopes. We analyze the standard concept of stability in the sense
Octavian Pastravanu   +1 more
doaj   +1 more source

A Novel NeighShrink Correction Algorithm in Image Denoising

open access: yesIranian Journal of Electrical and Electronic Engineering, 2017
Image denoising as a pre-processing stage is a used to preserve details, edges and global contrast without blurring the corrupted image. Among state-of-the-art algorithms, block shrinkage denoising is an effective and compatible method to suppress ...
E. Ehsaeyan
doaj  

IN THIS ISSUE: Food Systems Resilience

open access: yesJournal of Agriculture, Food Systems, and Community Development, 2017
In this combined spring and summer issue of JAFSCD we highlight the growing interest in food systems resilience, as depicted on our cover by the design of the Hyperions project by Vincent Callebaut Architectures.
Duncan Hilchey
doaj   +1 more source

Trace maps on rigid Stein spaces

open access: yesmanuscripta mathematica
AbstractWe provide a relative version of the trace map from the work of Beyer, which can be associated to any finite étale morphism $$ X \rightarrow Y$$ X → Y of smooth rigid Stein spaces and which then relates the Serre duality on X with ...
openaire   +3 more sources

A Stein variational Newton method

open access: yes, 2018
Stein variational gradient descent (SVGD) was recently proposed as a general purpose nonparametric variational inference algorithm [Liu & Wang, NIPS 2016]: it minimizes the Kullback-Leibler divergence between the target distribution and its approximation
Cui, Tiangang   +4 more
core  

Cohomology with compact supports for Stein spaces.

open access: yesJournal für die reine und angewandte Mathematik (Crelles Journal), 1987
It is known that if X is a Stein manifold of dimension n then \(H_ i(X;{\mathbb{Z}})=0\) for ...
openaire   +1 more source

Playfulness an (Un)-performability in Gertrude Stein's Modernist Drama

open access: yesSinais de Cena, 2018
Gertrude Stein's theatre, a theatre of modernism, can be studied as an example of experimental dramaturgy, in that it finds itself suspended between two identities: that of discourse, and that of a theatrical score.
Avra Sidiropoulou
doaj  

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