Results 151 to 160 of about 2,165,172 (354)

Point cloud geometry compression with sparse cascaded residuals and sparse attention

Electronics Letters
Effective compression of point clouds is essential for implementing virtual and mixed reality applications, which require encoding millions or even tens of millions of points. This paper offers a new geometric compression for point clouds based on sparse
Shiyu Lu, Huamin Yang, Cheng Han
doaj   +1 more source

Bisectors determining unique pairs of points in the bidisk [PDF]

arXiv, 2016
Bisectors are equidistant hypersurfaces between two points and are basic objects in a metric geometry. They play an important part in understanding the action of subgroups of isometries on a metric space. In many metric geometries (spherical, Euclidean, hyperbolic, complex hyperbolic, to name a few) bisectors do not uniquely determine a pair of points,
arxiv  

A comparative analysis of deep learning architectures with data augmentation and multichannel input for locoregional breast cancer radiotherapy

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Studies on deep learning dose prediction increasingly focus on 3D models with multiple input channels and data augmentation, which increases the training time and thus also the environmental burden and hampers the ease of re‐training. Here we compare 2D and 3D U‐Net models with clinical accepted plans to evaluate the appropriateness of
Rosalie Klarenberg, Nienke L. M. Bakx, Coen W. Hurkmans   +2 more
wiley   +1 more source

An Environment Recognition Algorithm for Staircase Climbing Robots

Remote Sensing
For deformed wheel-based staircase-climbing robots, the accuracy of staircase step geometry perception and scene mapping are critical factors in determining whether the robot can successfully ascend the stairs and continue its task.
Yanjie Liu, Yanlong Wei, Chao Wang, Heng Wu   +3 more
doaj   +1 more source

Holographic two-point functions in a disorder system

Physics Letters B, 2023
We study the holographic dual of two-point correlation functions for nonconformal field theories. We first take into account a Lifshitz geometry as the dual of a Lifshitz field theory which may appear at a critical or IR fixed point.
Chanyong Park
doaj  

Rationality of forms of $\overline{\mathcal M}_{0,n}$ [PDF]

arXiv
We study equivariant geometry and rationality of moduli spaces of points on the projective line, for twists associated with permutations of the points.
arxiv  

Multivariance as a crucial property of microcosm [PDF]

arXiv, 2008
The conventional method of a generalized geometry construction, based on deduction of all propositions of the geometry from axioms, appears to be imperfect in the sense, that multivariant geometries cannot be constructed by means of this method. Multivariant geometry is such a geometry, where at the point P there are many vectors PP', PP'',...
arxiv  

Closest-Point Problems in Computational Geometry [PDF]

, 2000
Michiel Smid
openalex   +1 more source

On the geometry of fixed points and discontinuity

Hacettepe Journal of Mathematics and Statistics
Recently, there has been a considerable effort to obtain new solutions to the Rhoades' open problem on the existence of contractive mappings that admit discontinuity at the fixed point. An extended version of this problem is also stated using a geometric approach.
Rajendra Prasad PANT, Nihal ÖZGÜR, Bharti JOSHI, Mangey RAM   +3 more
openaire   +2 more sources

Some Points in the Geometry of Cubic Surfaces [PDF]

Proceedings of the London Mathematical Society, 1913
n ...
openaire   +3 more sources