Results 161 to 170 of about 2,183 (247)

Mixture multigroup structural equation modelling for ordinal data

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract Social scientists often compare groups in terms of relations between latent variables (LV) (i.e. structural relations) using Structural Equation Modelling (SEM). LVs are measured indirectly by questionnaires; thus, measurement invariance must be evaluated before comparisons can be made. To efficiently compare many groups, the recently proposed
Andres F. Perez Alonso, Jeroen K. Vermunt, Yves Rosseel, Kim De Roover   +3 more
wiley   +1 more source

Geodesic Convexity of the Symmetric Eigenvalue Problem and Convergence of Steepest Descent. [PDF]

J Optim Theory Appl
Alimisis F, Vandereycken B.
europepmc   +1 more source

FluidMap: Proportional and Spatially Consistent Layout Enrichments in Multidimensional Projections

Computer Graphics Forum, EarlyView.
FluidMap faithfully represents the frequency of an attribute and preserves spatial consistency. Current space‐filling methods over‐ or under‐represent attribute categories (i.e., all Voronoi‐based methods), sacrifice spatial consistency (i.e., Nmap) or both (i.e., Voronoi‐MWα).
Daniela Blumberg, Patrick Paetzold, Michael Stroh, Oliver Deussen, Daniel A. Keim, Frederik L. Dennig   +5 more
wiley   +1 more source

Quantum higher-order Fourier analysis and the Clifford hierarchy. [PDF]

Proc Natl Acad Sci U S A
Bu K, Gu W, Jaffe A.
europepmc   +1 more source

SDFs from Unoriented Point Clouds using Neural Variational Heat Distances

Computer Graphics Forum, EarlyView.
We propose a novel variational approach for computing neural Signed Distance Fields (SDF) from unoriented point clouds. We first compute a small time step of heat flow (middle) and then use its gradient directions to solve for a neural SDF (right). Abstract We propose a novel variational approach for computing neural Signed Distance Fields (SDF) from ...
Samuel Weidemaier, Florine Hartwig, Josua Sassen, Sergio Conti, Mirela Ben‐Chen, Martin Rumpf   +5 more
wiley   +1 more source

Vertebral Growth Modulation Through Periosteal Resection and Fixed Length Deformity Overcorrection: Computational and In Vivo Pilot Study. [PDF]

JOR Spine
Halanski MA, Jeffers C, Abubakr Y, Zhou M, Kokinos B, Twedt M, Bennett D, Hamman S, Crenshaw T, O'Connell GD, Haider H.   +10 more
europepmc   +1 more source

Statistical Denoising of Transient Rendering

Computer Graphics Forum, EarlyView.
Abstract Transient rendering simulates light in motion, measuring the time of flight from the light source to the camera. However, the stochastic nature of Monte Carlo is aggravated in transient rendering, since samples are now spread along the temporal domain.
Oscar Pueyo‐Ciutad, Alvaro Lopez, Diego Gutierrez   +2 more
wiley   +1 more source

Regularized Tensor Quantile Regression With Applications to Neuroimaging Data Analysis. [PDF]

Stat Med
Pietrosanu M, Yu D, Mizera I, Jiang B, Kong L.   +4 more
europepmc   +1 more source

Survey on differential estimators for 3d point clouds

Computer Graphics Forum, EarlyView.
Abstract Recent advancements in 3D scanning technologies, including LiDAR and photogrammetry, have enabled the precise digital replication of real‐world objects. These methods are widely used in fields such as GIS, robotics, and cultural heritage. However, the point clouds generated by such scans are often noisy and unstructured, posing challenges for ...
Léo Arnal–Anger, Thibault Lejemble, David Coeurjolly, Loïc Barthe, Nicolas Mellado   +4 more
wiley   +1 more source

Design and Vision-Based Calibration of a Five-Axis Precision Dispensing Machine. [PDF]

Micromachines (Basel)
Wang R, Liao J, Wang B, Zhong Q, Dong Y, Wang H.   +5 more
europepmc   +1 more source