Results 141 to 150 of about 8,142,358 (299)

Sleep Power Spectral Density and Spindles in PTSD and Their Relationship to Symptom Severity. [PDF]

Front Psychiatry, 2021
Denis D, Bottary R, Cunningham TJ, Zeng S, Daffre C, Oliver KL, Moore K, Gazecki S, Kram Mendelsohn A, Martinez U, Gannon K, Lasko NB, Pace-Schott EF.   +12 more
europepmc   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

The output autocorrelation function and power spectral density of a diode frequency converter [PDF]

, 1966
Output autocorrelation function and power spectral density of diode frequency ...
Ippolito, L. J.
core  

Plot of the mean power spectral density for each of the episodes used in this study.

, 2016
Plot of the mean power spectral density for each of the episodes used in this study.
Lucas C. Parra (266691), Eric Smouha (3342137), Simon Henin (3342140), Dovid Fein (3342134)   +3 more
core   +1 more source

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

Advanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar, Dhanadeep Dutta, G. Bharat Reddy   +2 more
wiley   +1 more source

Edgeworth Expansions for Spectral Density Estimates and Studentized Sample Mean - (Now published in Economic Theory, 17 (2001), pp.497-539. [PDF]

We establish valid Edgeworth expansions for the distribution of smoothed nonparametric spectral estimates, and of studentized versions of linear statistics such as the same mean, where the studentization employs such a nonparametric spectral estimate ...
Carlos Velasco, Peter M Robinson
core  

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source

Nonlinear distortion analysis for multisine excitation constrained by power spectral density

Journal of Measurement Science and Instrumentation, 2016
Nonlinear distortion introduced by an amplifier when subjected to a multisine excitation decreases the measurement accuracy in many metrological and measurement areas.In this paper,we performed qualitative and quantitative analyses of the nonlinear ...
ZHOU Kun-li, QU Ji-feng, ZHOU Zhen-yu
doaj  

Alterations of the alpha rhythm in visual snow syndrome: a case-control study

The Journal of Headache and Pain
Background Visual snow syndrome is a disorder characterized by the combination of typical perceptual disturbances. The clinical picture suggests an impairment of visual filtering mechanisms and might involve primary and secondary visual brain areas, as ...
Antonia Klein, Sarah A. Aeschlimann, Frederic Zubler, Adrian Scutelnic, Franz Riederer, Matthias Ertl, Christoph J. Schankin   +6 more
doaj   +1 more source

An investigation of gecko attachment on wet and rough substrates leads to the application of surface roughness power spectral density analysis. [PDF]

Sci Rep, 2022
Palecek AM, Garner AM, Klittich MR, Stark AY, Scherger JD, Bernard C, Niewiarowski PH, Dhinojwala A.   +7 more
europepmc   +1 more source