Results 21 to 30 of about 31,702 (236)

Pavement distress detection using terrestrial laser scanning point clouds – Accuracy evaluation and algorithm comparison

open access: yesISPRS Open Journal of Photogrammetry and Remote Sensing, 2022
In this paper, we compared five crack detection algorithms using terrestrial laser scanner (TLS) point clouds. The methods are developed based on common point cloud processing knowledge in along- and across-track profiles, surface fitting or local ...
Ziyi Feng   +8 more
doaj   +1 more source

Pointwise Bounds for Joint Eigenfunctions of Quantum Completely Integrable Systems [PDF]

open access: yesCommunications in Mathematical Physics, 2020
AbstractLet (M, g) be a compact Riemannian manifold of dimensionnand$$P_1:=-h^2\Delta _g+V(x)-E_1$$P1:=-h2Δg+V(x)-E1so that$$dp_1\ne 0$$dp1≠0on$$p_1=0$$p1=0. We assume that$$P_1$$P1is quantum completely integrable (ACI) in the sense that there exist functionally independent pseuodifferential operators$$P_2,\dots P_n$$P2,⋯Pnwith$$[P_i,P_j]=0$$[Pi,Pj]=0,$
Galkowski, J, Toth, JA
openaire   +4 more sources

Separation of Wood and Foliage for Trees From Ground Point Clouds Using a Novel Least-Cost Path Model

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
Nowadays, laser scanning technology has provided an effective andnondestructive approach to reveal the forest's developmental process and physiological properties.
Sheng Xu, Kai Zhou, Yuan Sun, Ting Yun
doaj   +1 more source

Weak Completeness of Coalgebraic Dynamic Logics [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2015
We present a coalgebraic generalisation of Fischer and Ladner's Propositional Dynamic Logic (PDL) and Parikh's Game Logic (GL). In earlier work, we proved a generic strong completeness result for coalgebraic dynamic logics without iteration.
Helle Hvid Hansen, Clemens Kupke
doaj   +1 more source

Completeness results for quasi-categories of algebras, homotopy limits, and related general constructions [PDF]

open access: yes, 2015
Consider a diagram of quasi-categories that admit and functors that preserve limits or colimits of a fixed shape. We show that any weighted limit whose weight is a projective cofibrant simplicial functor is again a quasi-category admitting these (co ...
Riehl, Emily, Verity, Dominic
core   +2 more sources

Weighted Hardy inequalities beyond Lipschitz domains [PDF]

open access: yes, 2012
It is a well-known fact that in a Lipschitz domain \Omega\subset R^n a p-Hardy inequality, with weight d(x,\partial\Omega)^\beta, holds for all u\in C_0^\infty(\Omega) whenever ...
Lehrbäck, Juha
core   +1 more source

On Open Scattering Channels for Manifolds with Ends [PDF]

open access: yes, 2012
In the framework of time-dependent geometric scattering theory, we study the existence and completeness of the wave operators for perturbations of the Riemannian metric for the Laplacian on a complete manifold of dimension $n$.
Hempel, Rainer   +2 more
core   +1 more source

When is an ultracomplete space almost locally compact?

open access: yesApplied General Topology, 2006
We study spaces X which have a countable outer base in βX; they are called ultracomplete in the most recent terminology. Ultracompleteness implies Cech-completeness and is implied by almost local compactness (≡having all points of non-local compactness ...
Daniel Jardón Arcos   +1 more
doaj   +1 more source

Character groups of Hopf algebras as infinite-dimensional Lie groups [PDF]

open access: yes, 2015
In this article character groups of Hopf algebras are studied from the perspective of infinite-dimensional Lie theory. For a graded and connected Hopf algebra we construct an infinite-dimensional Lie group structure on the character group with values in ...
Bogfjellmo, Geir   +2 more
core   +3 more sources

On the equivalence of stochastic completeness, Liouville and Khas'minskii condition in linear and nonlinear setting [PDF]

open access: yes, 2012
Set in Riemannian enviroment, the aim of this paper is to present and discuss some equivalent characterizations of the Liouville property relative to special operators, in some sense modeled after the p-Laplacian with potential. In particular, we discuss
Mari, Luciano, Valtorta, Daniele
core   +2 more sources

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