Results 11 to 20 of about 44,177 (192)

Numerical Investigation of Liquid Flow Behaviors through Closed Rough Fractures in the Self-Propped Shale Formation

open access: yesEnergies, 2022
The surface morphology of fractures formed by hydraulic fracturing is usually rough. The roughness of the fracture surface is the main reason the actual fracture conductivity deviates from the ideal flat plate model result.
Qiqi Wang, Mian Chen, Jiaxin Lv
doaj   +1 more source

On the quermassintegrals of convex bodies [PDF]

open access: yesJournal of Inequalities and Applications, 2013
The well-known question for quermassintegrals is the following: For which values of i ∈ N and every pair of convex bodies K and L ,i s it true that Wi(K + L) Wi+1(K + L) ≥ Wi(K) ˜ Wi+1(K) + Wi(L) Wi+1(L) ? In 2003, the inequality was proved if and only if i = n –1o ri = n – 2.
Zhao, C, Cheung, WS
openaire   +4 more sources

Equilibria of Plane Convex Bodies [PDF]

open access: yesJournal of Nonlinear Science, 2021
AbstractWe obtain a formula for the number of horizontal equilibria of a planar convex body K with respect to a center of mass O in terms of the winding number of the evolute of $$\partial K$$ ∂ K with respect to O.
Jonas Allemann   +2 more
openaire   +4 more sources

Convex hull estimation of mammalian body segment parameters

open access: yesRoyal Society Open Science, 2021
Obtaining accurate values for body segment parameters (BSPs) is fundamental in many biomechanical studies, particularly for gait analysis. Convex hulling, where the smallest-possible convex object that surrounds a set of points is calculated, has been ...
Samuel J. Coatham   +2 more
doaj   +1 more source

Scaling of convex hull volume to body mass in modern primates, non-primate mammals and birds. [PDF]

open access: yesPLoS ONE, 2014
The volumetric method of 'convex hulling' has recently been put forward as a mass prediction technique for fossil vertebrates. Convex hulling involves the calculation of minimum convex hull volumes (vol(CH)) from the complete mounted skeletons of modern ...
Charlotte A Brassey, William I Sellers
doaj   +1 more source

Wireless Sensor Network-Based Rigid Body Localization for NLOS Parameter Estimation

open access: yesSensors, 2022
In wireless sensor network (WSN)-based rigid body localization (RBL) systems, the non-line-of-sight (NLOS) propagation of the wireless signals leads to severe performance deterioration.
Pengwu Wan   +3 more
doaj   +1 more source

Ellipses surrounding convex bodies

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2022
If, for a double normal xx* of a convex body K, an ellipse E ∋ x, x* is included in K, we say that E is surrounded by the boundary of K. If, instead, in the plane of E, K is included in the convex hull of E, then we say that E is surrounding K.
Zamfirescu Tudor
doaj   +1 more source

The Heart of a Convex Body [PDF]

open access: yes, 2013
15 pages, 3 figures. appears as "Geometric Properties for Parabolic and Elliptic PDE's", Springer INdAM Series Volume 2, 2013, pp 49 ...
Lorenzo Brasco, MAGNANINI, ROLANDO
openaire   +3 more sources

Nested Convex Bodies are Chaseable [PDF]

open access: yesAlgorithmica, 2018
In the Convex Body Chasing problem, we are given an initial point $v_0$ in $R^d$ and an online sequence of $n$ convex bodies $F_1, ..., F_n$. When we receive $F_i$, we are required to move inside $F_i$. Our goal is to minimize the total distance travelled. This fundamental online problem was first studied by Friedman and Linial (DCG 1993).
Bansal, Nikhil   +4 more
openaire   +9 more sources

Elastic energy of a convex body [PDF]

open access: yesMathematische Nachrichten, 2015
In this paper a Blaschke‐Santaló diagram involving the area, the perimeter and the elastic energy of planar convex bodies is considered. More precisely we give a description of set urn:x-wiley:0025584X:media:mana201400256:mana201400256-math-0001where A is the area, P is the perimeter and E is the elastic energy, that is a Willmore type energy in the ...
Takéo Takahashi   +3 more
openaire   +5 more sources

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