Results 21 to 30 of about 28,239 (233)

Constant slope, entropy, and horseshoes for a map on a tame graph [PDF]

open access: yesErgodic Theory and Dynamical Systems, 2019
We study continuous countably (strictly) monotone maps defined on a tame graph, i.e. a special Peano continuum for which the set containing branch points and end points has countable closure. In our investigation we confine ourselves to the countable Markov case.
ADAM BARTOŠ   +4 more
openaire   +3 more sources

Discriminating Bacterial Infection from Other Causes of Fever Using Body Temperature Entropy Analysis

open access: yesEntropy, 2022
Body temperature is usually employed in clinical practice by strict binary thresholding, aiming to classify patients as having fever or not. In the last years, other approaches based on the continuous analysis of body temperature time series have emerged.
Borja Vargas   +6 more
doaj   +1 more source

Research on Slope Stability Evaluation Based on Improved Set Pair Analysis Method: A Case of Tonglvshan Open-Pit Mine

open access: yesShock and Vibration, 2021
In this paper, combined with fuzzy analytic hierarchy process (FAHP), information entropy theory, and set pair analysis (SPA) theory, an improved set pair analysis model (EFAHP-SPA) for open-pit mine slope stability evaluation based on entropy method and
Xiaojie Yang   +3 more
doaj   +1 more source

Novel Features for Binary Time Series Based on Branch Length Similarity Entropy

open access: yesEntropy, 2021
Branch length similarity (BLS) entropy is defined in a network consisting of a single node and branches. In this study, we mapped the binary time-series signal to the circumference of the time circle so that the BLS entropy can be calculated for the ...
Sang-Hee Lee, Cheol-Min Park
doaj   +1 more source

A Double Feature Extraction Method for Rolling Bearing Fault Diagnosis Based on Slope Entropy and Fuzzy Entropy

open access: yesMathematical Problems in Engineering, 2022
Rolling bearings are the key components for the safe operation of mechanical equipment. It plays an irreplaceable role in the normal operation of mechanical equipment. Higher load makes higher failure rate of rolling bearing. Accurate identification of the fault location is an important step in the diagnosis of the rolling bearing fault.
Haomiao Ma, Yingfeng Xu, Jianye Wang
openaire   +1 more source

Rolling bearing state assessment based on the composite multiscale weight slope entropy and hierarchical prototype-based approach

open access: yesAdvances in Mechanical Engineering, 2022
To evaluate the state of rolling bearing more accurately, a new feature called composite multiscale weight slope entropy was proposed for the complexity measurement of vibration signals.
Jinbao Zhang   +4 more
doaj   +1 more source

Entropy Stable Discontinuous Galerkin Finite Element Method with Multi-Dimensional Slope Limitation for Euler Equations

open access: yesMoroccan Journal of Pure and Applied Analysis, 2022
We present an entropy stable Discontinuous Galerkin (DG) finite element method to approximate systems of 2-dimensional symmetrizable conservation laws on unstructured grids. The scheme is constructed using a combination of entropy conservative fluxes and
Madrane Aziz, Benkhaldoun Fayssal
doaj   +1 more source

Stability evaluation of sand slopes based on the Bayesian-PSO algorithm

open access: yesZhongguo dizhi zaihai yu fangzhi xuebao, 2021
Sand slide slope are sudden, unpredictable and has great harm.Through field investigations around Lhasa, 12 representative data sets of sand slide slope disaster points were collected.
Chaohua LOU   +4 more
doaj   +1 more source

Growth of Rényi Entropies in Interacting Integrable Models and the Breakdown of the Quasiparticle Picture

open access: yesPhysical Review X, 2022
Rényi entropies are conceptually valuable and experimentally relevant generalizations of the celebrated von Neumann entanglement entropy. After a quantum quench in a clean quantum many-body system they generically display a universal linear growth in ...
Bruno Bertini   +4 more
doaj   +1 more source

Research on the Longitudinal Section of River Restoration Using Probabilistic Theory

open access: yesEntropy, 2021
Since the 1960s, many rivers have been destroyed as a consequence of the process of rapid urbanization. As accurate figures are important to repair rivers, there have been many research reports on methods to obtain the exact river slope and elevation ...
Yeon-Moon Choo, Ji-Min Kim, Ik-Tae An
doaj   +1 more source

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