Results 21 to 30 of about 203,327 (292)

Permutations, Signs, and Sum Ranges

open access: yesAxioms, 2023
The sum range SRx;X, for a sequence x=(xn)n∈N of elements of a topological vector space X, is defined as the set of all elements s∈X for which there exists a bijection (=permutation) π:N→N, such that the sequence of partial sums (∑k=1nxπ(k))n∈N converges
Sergei Chobanyan   +3 more
doaj   +1 more source

Generating biometric random cryptographic key based on unique fingerprint features [PDF]

open access: yesهوش محاسباتی در مهندسی برق, 2023
This paper uses the unique biometric features of fingerprints to generate random cryptographic keys. The main aspects of the security of the generated key include the privacy of the fingerprint and the randomness and complexity of the key generation ...
Bahram Rashidi, Ali Goudarzi
doaj   +1 more source

A Re-Evaluation of the Swiss Hail Suppression Experiment Using Permutation Techniques Shows Enhancement of Hail Energies When Seeding

open access: yesAtmosphere, 2021
Grossversuch IV is a large and well documented experiment on hail suppression by silver iodide seeding. The original 1986 evaluation remained vague, although indicating a tendency to increase hail when seeding.
Armin Auf der Maur, Urs Germann
doaj   +1 more source

The Refined Composite Downsampling Permutation Entropy Is a Relevant Tool in the Muscle Fatigue Study Using sEMG Signals

open access: yesEntropy, 2021
Surface electromyography (sEMG) is a valuable technique that helps provide functional and structural information about the electric activity of muscles. As sEMG measures output of complex living systems characterized by multiscale and nonlinear behaviors,
Philippe Ravier   +3 more
doaj   +1 more source

The Use of the Permutation Algorithm for Suboptimising the Position of Used Nozzles on the Field Sprayer Boom

open access: yesApplied Sciences, 2022
The worn-out nozzles of field sprayers cause agricultural treatment to be uneven and therefore ineffective. Spray nozzles are consumable elements of the field sprayer that are subject to inspection and in the event of their excessive wear should be ...
Jacek Wawrzosek, Stanisław Parafiniuk
doaj   +1 more source

Scale Invariant Digital Color Image Encryption Using a 3D Modular Chaotic Map

open access: yesIEEE Access, 2021
Cryptography is one of the most important security mechanisms for the transmission of digital media on the Internet. Most proposed cryptographic image methods based on chaotic maps are dependent upon image sizes and most of them worked on square images ...
Ali Momeni Asl   +2 more
doaj   +1 more source

Dynamic S-Box Design Using a Novel Square Polynomial Transformation and Permutation

open access: yesIEEE Access, 2021
New era ciphers employ substitution boxes (S-boxes) which assist in the provision of security for the plaintext in the encryption phase and transforming the ciphertext on the receiver side into original plaintext in the decryption phase.
Amjad Hussain Zahid   +11 more
doaj   +1 more source

Permutation and sampling with maximum length CA for pseudorandom number generation [PDF]

open access: yes, 2007
In this paper, we study the effect of dynamic permutation and sampling on the randomness quality of sequences generated by cellular automata (CA). Dynamic permutation and sampling have not been explored in previous CA work and a suitable implementation ...
Wijaya, S, Guan, SU, Tan, SK
core   +6 more sources

Ballot permutations and odd order permutations [PDF]

open access: yesDiscrete Mathematics, 2020
There was an error with an alternative formula for b(n,3) that was on page ...
openaire   +3 more sources

Calculating Permutation Entropy without Permutations [PDF]

open access: yesComplexity, 2020
A method for analyzing sequential data sets, similar to the permutation entropy one, is discussed. The characteristic features of this method are as follows: it preserves information about equal values, if any, in the embedding vectors; it is exempt from combinatorics; and it delivers the same entropy value as does the permutation method, provided the ...
openaire   +4 more sources

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