Results 31 to 40 of about 128,827 (147)

Assessing Forest Vitality and Forest Structure Using 3D Data: A Case Study From the Hainich National Park, Germany

open access: yesFrontiers in Forests and Global Change, 2022
The adaptation of forest management to changing environmental conditions due to climate change relies on information on the current forest and tree vitality. In common practice, the percentage of crown defoliation is used as a proxy for tree vitality, an
Marius G. Heidenreich, Dominik Seidel
doaj   +1 more source

Box dimension, oscillation and smoothness in function spaces

open access: yesJournal of Function Spaces and Applications, 2005
The aim of this paper is twofold. First we relate upper and lower box dimensions with oscillation spaces, and we develop embeddings or inclusions between oscillation spaces and Besov spaces.
Abel Carvalho
doaj   +1 more source

On sets containing a unit distance in every direction

open access: yesDiscrete Analysis, 2021
On sets containing a unit distance in every direction, Discrete Analysis 2021:5, 13 pp. A _Kakeya set_ in $\mathbb R^d$ is a subset $A\subset\mathbb R^d$ that contains a line in every direction. Besicovitch famously proved that a Kakeya set in $\mathbb
Pablo Shmerkin, Han Yu
doaj   +1 more source

Metric dimension, doubly resolving set and strong metric dimension for $(C_n\Box P_k)\Box P_m$

open access: yes, 2021
arXiv admin note: substantial text overlap with arXiv:2103 ...
Liu, Jia-Bao, Zafari, Ali
openaire   +2 more sources

An Improve Differential Box Counting Method to Estimate Fractal Dimension [PDF]

open access: yesEngineering and Technology Journal, 2015
The mathematical concept that used to measure the complexity of the fractal sets is known as fractal dimension. It is considered as a global feature for fractal images.
N.M.G. Alsaidi, W.J. Abdulaal
doaj   +1 more source

Estimation of Citarum Watershed Boundary’s Length Based on Fractal’s Power Law by the Modified Box-Counting Dimension Algorithm

open access: yesMathematics, 2023
This research aimed to estimate the length of the Citarum watershed boundary because the data are still unknown. We used the concept of fractal’s power law and its relation to the length of an object, which is still not described in other research.
Michael Lim   +2 more
doaj   +1 more source

Box-counting dimensions of generalised fractal nests [PDF]

open access: yesChaos, Solitons & Fractals, 2018
Fractal nests are sets defined as unions of unit $n$-spheres scaled by a sequence of $k^{-α}$ for some $α>0$. In this article we generalise the concept to subsets of such spheres and find the formulas for their box counting dimensions. We introduce some novel classes of parameterised fractal nests and apply these results to compute the dimensions ...
openaire   +3 more sources

A holistic approach to determine tree structural complexity based on laser scanning data and fractal analysis

open access: yesEcology and Evolution, 2018
The three‐dimensional forest structure affects many ecosystem functions and services provided by forests. As forests are made of trees it seems reasonable to approach their structure by investigating individual tree structure.
Dominik Seidel
doaj   +1 more source

Box-Counting Dimension Using Triangles

open access: yes, 2016
An alternate definition of the box-counting dimension is proposed, to provide a better approximation for fractals involving rotation such as the 'Bradley Spiral' structure. A curve fitting comparison of this definition with the box-counting dimension is also presented.
Athar, Tazeen   +2 more
openaire   +2 more sources

Persistent Homology and the Upper Box Dimension [PDF]

open access: yesDiscrete & Computational Geometry, 2019
39 pages, 8 ...
openaire   +3 more sources

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