Results 11 to 20 of about 2,910,785 (256)

Gray Images of Constacyclic Codes Over Some Polynomial Residue Rings

open access: yesپژوهش‌های ریاضی, 2021
Let  be the quotient ring    where  is the finite field of size   and  is a positive integer. A Gray map  of length  over  is a special map from  to ( .
Reza Sobhani
doaj  

An Authentication Code over Galois Rings with Optimal Impersonation and Substitution Probabilities

open access: yesMathematical and Computational Applications, 2018
Two new systematic authentication codes based on the Gray map over a Galois ring are introduced. The first introduced code attains optimal impersonation and substitution probabilities.
Juan Carlos Ku-Cauich   +2 more
doaj   +1 more source

The Steganography Based On Chaotic System for Random LSB Positions

open access: yesWasit Journal of Computer and Mathematics Science, 2022
The objective of hiding text in an image is hiding text without raising suspicions that the image contains a hidden message or text, which leads to protecting and maintaining text confidentiality.
Rusul Mansoor Al-Amri   +2 more
doaj   +1 more source

Quantitative myelin-related maps from R1 and T2* ratio images using a single ME-MP2RAGE sequence in 7T MRI

open access: yesFrontiers in Neuroanatomy, 2022
Background: There still are limitations associated with quantifying myelin content using brain magnetic resonance imaging (MRI) despite several studies conducted on this subject.
Jeong-Min Shim   +4 more
doaj   +1 more source

Constacyclic codes over 𝔽pm[u1, u2,⋯,uk]/〈 ui2 = ui, uiuj = ujui〉

open access: yesOpen Mathematics, 2018
In this paper, we study linear codes over ring Rk = 𝔽pm[u1, u2,⋯,uk]/〈ui2$\begin{array}{} u^{2}_{i} \end{array} $ = ui, uiuj = ujui〉 where k ≥ 1 and 1 ≤ i, j ≤ k.
Zheng Xiying, Kong Bo
doaj   +1 more source

Effects of Vacuum and Modified Atmosphere Packaging on the Quality and Shelf-Life of Gray Triggerfish (Balistes capriscus) Fillets

open access: yesFoods, 2021
Seafood products are perceived as healthy foods. However, several species of seafood are still not fully utilized for different reasons or can be valued outside the original locale, if issues with the short shelf-life and/or the preparation/presentation ...
Eduardo Esteves   +2 more
doaj   +1 more source

Gray isometries for finite $p$-groups [PDF]

open access: yesTransactions on Combinatorics, 2013
We construct two classes of Gray maps, called type-I Gray map and type-II Gray map, for a finite $p$-group $G$. Type-I Gray maps are constructed based on the existence of a Gray map for a maximal subgroup $H$ of $G$.
Reza Sobhani
doaj  

Characterization of the cortical myeloarchitecture with inhomogeneous magnetization transfer imaging (ihMT)

open access: yesNeuroImage, 2021
Background: Myelin specific imaging techniques to characterize white matter in demyelinating diseases such as multiple sclerosis (MS) have become an area of increasing focus.
Fanny Munsch   +6 more
doaj   +1 more source

A Gray Scale Correction Method for Side-Scan Sonar Images Based on Retinex

open access: yesRemote Sensing, 2019
When side-scan sonars collect data, sonar energy attenuation, the residual of time varying gain, beam patterns, angular responses, and sonar altitude variations occur, which lead to an uneven gray level in side-scan sonar images.
Xiufen Ye   +4 more
doaj   +1 more source

Two-Dimensional Compact Variational Mode Decomposition-Based Low-Light Image Enhancement

open access: yesIEEE Access, 2019
In this paper, a novel methodology is proposed for low-light image enhancement. The proposed algorithm contains three stages: image reconstruction, image enhancement and color restoration. Two-dimensional compact variational mode decomposition (2D-TV-VMD)
Fengji Ma, Junyi Chai, Hai Wang
doaj   +1 more source

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