Results 61 to 70 of about 773,938 (293)

Fault Diagnosis of the Bearing based on the Wavelet Transform and Approximate Entropy

open access: yesJixie chuandong, 2015
Combining the wavelet transform and approximate entropy theory,according to the characteristic that the approximate entropy will become larger with the increase of signal complexity,it is applied to the analysis of acoustic emission signals of the ...
Zhang Penglin   +4 more
doaj  

Effectiveness of Resistance Intradialytic Exercise Compared to Aerobic Intradialytic Exercise for Patients With Chronic Kidney Disease: A Randomized Controlled Clinical Trial

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Patients with chronic kidney disease undergoing hemodialysis commonly experience reduced physical function, fatigue, poor sleep quality, and impaired health‐related quality of life. Intradialytic exercise has been proposed as a non‐pharmacological strategy to improve these outcomes.
Klebson da Silva Almeida   +6 more
wiley   +1 more source

Free and classical entropy over the circle. [PDF]

open access: yes, 2007
Relative entropy with respect to normalized arclength measure on the circle is greater than or equal to the negative logarithmic energy (Voiculescu's negative free entropy) and is greater than or equal to the modified relative free entropy.
Blower, Gordon
core   +2 more sources

近似熵在欠驱动五杆机构混沌边缘分析中的应用

open access: yesJixie chuandong, 2014
Entropy is an approach to measure the irregularity of a set of data and one of rare quantitative analysis indicators for chaos.By using the method of entropy the edge of chaos for a mechanism is found and the threshold for the calculation of approximate ...
张猛   +4 more
doaj  

Quaternion Entropy for Analysis of Gait Data

open access: yesEntropy, 2019
Nonlinear dynamical analysis is a powerful approach to understanding biological systems. One of the most used metrics of system complexities is the Kolmogorov entropy. Long input signals without noise are required for the calculation, which are very hard
Agnieszka Szczęsna
doaj   +1 more source

Fractional Cumulative Residual Mean Relative Entropy and Its Application in an Aeroengine Gas Path System

open access: yesFractal and Fractional, 2023
Mean relative entropy has a wide range of applications in measuring information differences. However, relative entropy is difficult to approximate from empirical distribution entropy.
Keqiang Dong, Shushu Li
doaj   +1 more source

Approximation and Entropy Numbers of Embeddings Between Approximation Spaces

open access: yesConstructive Approximation, 2017
We consider general linear approximation spaces $X^b_q$ based on a quasi-Banach space $X$, and we analyse the degree of compactness of the embedding $X^b_q \hookrightarrow X$. Applications are given to periodic Besov spaces on the $d$-torus, including spaces of generalized and logarithmic smoothness.
Cobos Díaz, Fernando   +2 more
openaire   +4 more sources

Is There a Unique Physical Entropy? Micro versus Macro [PDF]

open access: yes, 2012
Entropy in thermodynamics is an extensive quantity, whereas standard methods in statistical mechanics give rise to a non-extensive expression for the entropy. This discrepancy is often seen as a sign that basic formulas of statistical mechanics should be
Dieks, D.G.B.J.   +4 more
core  

Microgravity Spherical Droplet Evaporation and Entropy Effects [PDF]

open access: yes, 2023
Recent efforts to understand low-temperature combustion (LTC) in internal combustion engines highlight the need to improve chemical kinetic mechanisms involved in the negative temperature coefficient (aka cool flame) regime.
Depcik, Christopher
core   +1 more source

Comparative Evaluation of Hemodiafiltration, Hemoperfusion, and Standard Hemodialysis on Efficacy, Inflammatory Control, Dialysis Adequacy, and Safety in End‐Stage Renal Disease: A Prospective Observational Study

open access: yesTherapeutic Apheresis and Dialysis, EarlyView.
ABSTRACT Background Chronic micro‐inflammation in patients with end‐stage renal disease (ESRD) is a significant driver of cardiovascular complications and diminished quality of life. While standard hemodialysis (SHD) effectively manages small‐molecule clearance, its ability to remove medium‐to‐large uremic toxins—the primary catalysts of systemic ...
Hongwei Zuo   +5 more
wiley   +1 more source

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