Results 61 to 70 of about 24,551,019 (389)

Spectral analysis of deformed random networks

open access: yes, 2009
We study spectral behavior of sparsely connected random networks under the random matrix framework. Sub-networks without any connection among them form a network having perfect community structure.
A. Banerjee   +8 more
core   +1 more source

Regularized adaptive long autoregressive spectral analysis [PDF]

open access: yes, 2001
This paper is devoted to adaptive long autoregressive spectral analysis when (i) very few data are available, (ii) information does exist beforehand concerning the spectral smoothness and time continuity of the analyzed signals.
Desodt, G.   +3 more
core   +5 more sources

Spectral proper orthogonal decomposition and its relationship to dynamic mode decomposition and resolvent analysis [PDF]

open access: yesJournal of Fluid Mechanics, 2017
We consider the frequency domain form of proper orthogonal decomposition (POD), called spectral proper orthogonal decomposition (SPOD). Spectral POD is derived from a space–time POD problem for statistically stationary flows and leads to modes that each ...
A. Towne, O. Schmidt, T. Colonius
semanticscholar   +1 more source

The carboxylate “gripper” of the substrate is critical for C‐4 stereo‐inversion by UDP‐glucuronic acid 4‐epimerase

open access: yesFEBS Letters, EarlyView.
UDP‐glucuronic acid 4‐epimerase (UGAepi) catalyzes NAD+‐dependent interconversion of UDP‐glucuronic acid (UDP‐GlcA) and UDP‐galacturonic acid (UDP‐GalA) via C4‐oxidation, 4‐keto‐intermediate rotation, and C4‐reduction. Here, Borg et al. examined the role of the substrate's carboxylate group in the enzymic mechanism by analyzing NADH‐dependent reduction
Annika J. E. Borg   +2 more
wiley   +1 more source

Investigating methods in data preparation for stochastic rainfall modeling: A case study for Kermanshah synoptic station rainfall data, Iran [PDF]

open access: yesJournal of Applied Research in Water and Wastewater, 2019
Given the climate changes, achieving rainfall forecast is of high importance and facing such challenges affected markedly in vast areas of societies. Accordingly, numerous nonlinear and linear methods have been developed. Most hydrological phenomena like
Mohammad Zeynoddin, Hossein Bonakdari
doaj   +1 more source

Highly sensitive index of sympathetic activity based on time-frequency spectral analysis of electrodermal activity.

open access: yesAmerican Journal of Physiology. Regulatory Integrative and Comparative Physiology, 2016
Time-domain indices of electrodermal activity (EDA) have been used as a marker of sympathetic tone. However, they often show high variation between subjects and low consistency, which has precluded their general use as a marker of sympathetic tone.
Hugo F. Posada-Quintero   +3 more
semanticscholar   +1 more source

Localized spectral analysis on the sphere [PDF]

open access: yesGeophysical Journal International, 2005
It is often advantageous to investigate the relationship between two geophysical data sets in the spectral domain by calculating admittance and coherence functions. While there exist powerful Cartesian windowing techniques to estimate spatially localized (cross-)spectral properties, the inherent sphericity of planetary bodies sometimes necessitates an ...
Wieczorek, Mark, Simons, Frederik
openaire   +5 more sources

P‐glycoprotein modulates the fluidity gradient of the plasma membrane of multidrug resistant CHO cells

open access: yesFEBS Letters, EarlyView.
To explore the impact of the overexpression of the multidrug‐transporter P‐glycoprotein (ABCB1) on membrane fluidity, we compared the transversal gradient of mobility and microviscosity in plasma membranes of drug‐sensitive Chinese hamster ovary cells (AuxB1) and their multidrug‐resistant derivatives (B30) using the fluorescent n‐(9‐anthroyloxy) fatty ...
Roger Busche   +2 more
wiley   +1 more source

Spectral analysis of multi-year GNSS code multipath time-series

open access: yesBudownictwo i Architektura, 2020
In the presented study multi-year time series of changes in the L1 pseudo-range multipath are analysed. Data from 8 stations of the EUREF Permanent Network (EPN) were used in the study.
Jacek Kudrys
doaj   +1 more source

A Polynomial Spectral Calculus for Analysis of DG Spectral Element Methods

open access: yes, 2017
We introduce a polynomial spectral calculus that follows from the summation by parts property of the Legendre-Gauss-Lobatto quadrature. We use the calculus to simplify the analysis of two multidimensional discontinuous Galerkin spectral element ...
A.D. Beck   +18 more
core   +1 more source

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