Results 31 to 40 of about 449,947 (310)

Acknowledgement to Reviewers of Entropy in 2018

open access: yesEntropy, 2019
Rigorous peer-review is the corner-stone of high-quality academic publishing [...]
Entropy Editorial Office
doaj   +1 more source

BD entropy and Bernis–Friedman entropy

open access: yesComptes Rendus. Mathématique, 2018
In this note, we propose in the full generality a link between the BD entropy introduced by D. Bresch and B. Desjardins for the viscous shallow-water equations and the Bernis–Friedman (called BF) dissipative entropy introduced to study the lubrication equations.
Bresch, Didier   +4 more
openaire   +5 more sources

An entropy inequality

open access: yesQuantum Information and Computation, 2009
Let $S(\rho)=-\Tr (\rho\log\rho)$ be the von Neumann entropy of an $N$-dimensional quantum state $\rho$ and $e_2(\rho)$ the second elementary symmetric polynomial of the eigenvalues of $\rho$. We prove the inequality S(\rho) \;\le \; c(N) \; \sqrt{e_2(\rho)} where $c(N)=\log(N) \, \sqrt{\frac{2N}{N-1}}$.
Meik Hellmund, Armin Uhlmann
openaire   +2 more sources

Entropy: Modern Lab Management Software

open access: yes, 2022
Fixed ParamStore GUI now looks for param.db file in .entropy folder ParamStore GUI tags are now editable and correctly displayedIf you use this software in your published work, please cite it as ...
Quantum Machines
core   +1 more source

Entropy and Sorting

open access: yesJournal of Computer and System Sciences, 1992
AbstractWe reconsider the old problem of sorting under partial information, and give polynomial time algorithms for the following tasks: (1) Given a partial order P, find (adaptively) a sequence of comparisons (questions of the form, "is x < y?") which sorts ( i.e., finds an unknown linear extension of) P using O(log(e(P))) comparisons in worst case ...
Jeff Kahn 0001, Jeong Han Kim
openaire   +1 more source

Entropy-based semi-fragile watermarking of remote sensing images in the wavelet domain

open access: yes, 2019
This article presents a semi-fragile image tampering detection method for multi-band images. In the proposed scheme, a mark is embedded into remote sensing images, which have multiple frequential values for each pixel, applying tree-structured vector ...
Serra Ruiz, Jordi   +5 more
core   +1 more source

Tailoring Ferrimagnetic Transition Temperatures, Coercivity Fields, and Saturation Magnetization by Modulating Mn Concentration in (CoCrFeNi)1−xMnx High-Entropy Alloys

open access: yesFrontiers in Materials, 2022
Cr and Mn play intriguing roles in determining the magnetic properties of CoFeNi-based high-entropy alloys (HEA). In this study, we tune the stoichiometric Mn composition to systematically explore the magnetic properties of (CoCrFeNi)1−xMnx HEAs.
Chi-Hung Lee   +15 more
doaj   +1 more source

On the Entropy and the Maximum Entropy Principle of Uncertain Variables

open access: yes, 2023
A new variance formula is developed using the generalized inverse of an increasing function. Based on the variance formula, a new entropy formula for any uncertain variable is provided.
Guanzhong Ma, Yujun Liu
core   +1 more source

Memory and Entropy

open access: yesEntropy, 2022
I study the physical nature of traces. Surprisingly, (i) systems separation with (ii) temperature differences and (iii) long thermalization times are sufficient conditions to produce macroscopic traces. Traces of the past are ubiquitous because these conditions are largely satisfied in our universe.
openaire   +5 more sources

On the entropy of couplings

open access: yesInformation and Computation, 2015
In this paper, some general properties of Shannon information measures are investigated over sets of probability distributions with restricted marginals. Certain optimization problems associated with these functionals are shown to be NP-hard, and their special cases are found to be essentially information-theoretic restatements of well-known ...
Mladen Kovacevic 0001   +2 more
openaire   +3 more sources

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