Results 91 to 100 of about 1,409,025 (319)
An introduction to geometric complexity theory [PDF]
arXiv, 2015 I survey methods from differential geometry, algebraic geometry and representation theory relevant for the permanent v. determinant problem from computer science, an algebraic analog of the P v. NP problem.
arxiv
Automatic normal orientation in point clouds of building interiors
, 2019 Orienting surface normals correctly and consistently is a fundamental problem in geometry processing. Applications such as visualization, feature detection, and geometry reconstruction often rely on the availability of correctly oriented normals.
J Wang +5 more
core +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose This study quantitatively evaluates bladder changes and their dosimetric impact during the on‐couch adaptive process on a commercial CBCT‐based online adaptive radiotherapy (CT‐gART) platform. Methods Data from 183 fractions of ten patients receiving online ART for pelvic cancers were analyzed retrospectively.
Ingrid Valencia Lozano +7 more
wiley +1 more source
Digital Geometry, a Survey [PDF]
arXiv, 2018 This paper provides an overview of modern digital geometry and topology through mathematical principles, algorithms, and measurements. It also covers recent developments in the applications of digital geometry and topology including image processing, computer vision, and data science.
arxiv
Detection of edges using local geometry [PDF]
Researchers described a new representation, the local geometry, for early visual processing which is motivated by results from biological vision. This representation is richer than is often used in image processing.
Gualtieri, J. A., Manohar, M.
core +1 more source
Technique for depositing silicon dioxide on indium arsenide improves adhesion [PDF]
, 1970 Planar array processing of indium arsenide wafers includes dicing into a prescribed geometry, then cleaning and drying, and finally pre-oxidizing in an oxygen atmosphere at 500 degrees C.
core +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose A new workflow was investigated for Elekta Unity MR‐Linac by removing the computed tomography (CT)‐simulation step and using diagnostic CT (DCT) for reference plan generation. Materials and methods Ten patients with ultra‐hypofractionated prostate cancer treated with magnetic resonance imaging (MRI)‐guided adaptive radiotherapy were ...
Yuan Xu +5 more
wiley +1 more source
CAD-Based Monte Carlo Neutron Transport KSTAR Analysis for KSTAR
EPJ Web of Conferences, 2017 The Monte Carlo (MC) neutron transport analysis for a complex nuclear system such as fusion facility may require accurate modeling of its complicated geometry.
Seo Geon Ho +2 more
doaj +1 more source
Journal of Applied Clinical Medical Physics, EarlyView.Abstract Purpose Due to the tight curvature in their design, ring applicators are usually associated with large positioning errors. The standard practice to correct for these deviations based on global offsets may not be sufficient to comply with the recommended tolerance.
Leon G. Aldrovandi +3 more
wiley +1 more source
On diffusion approximation with discontinuous coefficients [PDF]
arXiv, 2002 Convergence of stochastic processes with jumps to diffusion processes is investigated in the case when the limit process has discontinuous coefficients. An example is given in which the diffusion approximation of a queueing model yields a diffusion process with discontinuous diffusion and drift coefficients.
arxiv