Results 11 to 20 of about 296,266 (130)

New Approaches to Fractal Dimension Estimation With Application to Gray-Scale Images

open access: yesIEEE Access, 2020
Two new approaches for calculating box-counting fractal dimension (FD) estimates for gray-scale images are considered to overcome some of the limitations of the standard box-counting method, which requires setting a threshold in a pre-processing step ...
Piotr D. Szyperski, D. Robert Iskander
doaj   +1 more source

Foundational Problems of Quantum Theory: Novel Approach to Temporal Probability Density

open access: yesJournal of Physics: Theories and Applications, 2022
Present study focuses on some foundational problems of quantum theory specifically deals with the concept of probability density and relating introductory problems.
Mustafa Erol, M. Emre Kuzucu
doaj   +1 more source

Neutrino oscillation in the q-metric

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
We investigate neutrino oscillation in the field of an axially symmetric space-time, employing the so-called q-metric, in the context of general relativity.
Kuantay Boshkayev   +2 more
doaj   +1 more source

A generalization of the standard map and its statistical characterization

open access: yesScientific Reports, 2022
From the statistical mechanical point of view, area-preserving maps have great potential and importance. These maps exhibit chaotic and regular behavior separately or together in the available phase space as the control parameter changes.
Kivanc Cetin   +2 more
doaj   +1 more source

Data-Targeted Prior Distribution for Variational AutoEncoder

open access: yesFluids, 2021
Bayesian methods were studied in this paper using deep neural networks. We are interested in variational autoencoders, where an encoder approaches the true posterior and the decoder approaches the direct probability.
Nissrine Akkari   +3 more
doaj   +1 more source

Fidelity of hyperbolic space for Bayesian phylogenetic inference.

open access: yesPLoS Computational Biology, 2023
Bayesian inference for phylogenetics is a gold standard for computing distributions of phylogenies. However, Bayesian phylogenetics faces the challenging computational problem of moving throughout the high-dimensional space of trees.
Matthew Macaulay   +2 more
doaj   +1 more source

Amyloid burden quantification depends on PET and MR image processing methodology.

open access: yesPLoS ONE, 2021
Quantification of amyloid load with positron emission tomography can be useful to assess Alzheimer's Disease in-vivo. However, quantification can be affected by the image processing methodology applied.
Guilherme D Kolinger   +7 more
doaj   +1 more source

An Image Encryption Algorithm Based on Discrete-Time Alternating Quantum Walk and Advanced Encryption Standard

open access: yesEntropy, 2022
This paper proposes an image encryption scheme based on a discrete-time alternating quantum walk (AQW) and the advanced encryption standard (AES). We use quantum properties to improve the AES algorithm, which uses a keystream generator related to AQW ...
Guangzhe Liu   +5 more
doaj   +1 more source

Confidence analysis of standard deviational ellipse and its extension into higher dimensional euclidean space. [PDF]

open access: yesPLoS ONE, 2015
Standard deviational ellipse (SDE) has long served as a versatile GIS tool for delineating the geographic distribution of concerned features. This paper firstly summarizes two existing models of calculating SDE, and then proposes a novel approach to ...
Bin Wang, Wenzhong Shi, Zelang Miao
doaj   +1 more source

Wigner function for the orientation state

open access: yesNew Journal of Physics, 2013
We introduce a quantum phase space representation for the orientation state of extended quantum objects, using the Euler angles and their conjugate momenta as phase space coordinates.
Timo Fischer   +2 more
doaj   +1 more source

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