Results 91 to 100 of about 191,849 (199)

Interpretability and Representability of Commutative Algebra, Algebraic Topology, and Topological Spectral Theory for Real‐World Data

Advanced Intelligent Discovery, Volume 2, Issue 5, October 2026.
This article investigates how persistent homology, persistent Laplacians, and persistent commutative algebra reveal complementary geometric, topological, and algebraic invariants or signatures of real‐world data. By analyzing shapes, synthetic complexes, fullerenes, and biomolecules, the article shows how these mathematical frameworks enhance ...
Yiming Ren, Guo‐Wei Wei
wiley   +1 more source

Edge‐Based Discretizations on Triangulations in Any Dimension, With Special Attention to Four‐Dimensional Space

International Journal for Numerical Methods in Fluids, Volume 98, Issue 10, Page 1143-1164, October 2026.
This article provides important geometric formulas for node‐centered, edge‐based schemes in any number of dimensions. These formulas are noteworthy, as they do not require the explicit formation of dual regions. We prove several key geometric results, with a particular focus on the four‐dimensional case, due to potential space‐time applications ...
Nicholas Tufillaro, David M. Williams, Hiroaki Nishikawa   +2 more
wiley   +1 more source

Research on 3D modeling method of complex rock strata surfaces based on unit divisio

Gong-kuang zidonghua, 2017
In view of the problem that existing 3D modeling method of rock strata surfaces does not systematically consider the construction of 3D modeling of complex rock strata surfaces with geological conditions such as fault and collapse column, horizontal ...
LIU Yong, CUI Hongqing
doaj   +1 more source

Micro‐ and Nanopatterning of Highly Conductive PEDOT Thin Films

Macromolecular Rapid Communications, Volume 47, Issue 19, 6 October 2026.
This work presents micro‐ and nanoscale fabrication strategies for organic thin‐film devices using non‐commercial PEDOT synthesized by V2O5‐mediated oxidative polymerization. Optimized films show controlled thickness and tunable conductivity. At the nanoscale, nanosphere lithography enables large‐area hexagonally packed PEDOT nanopillar arrays down to ...
Francesco Bisio, Sinan Baran Akdemir, Vittorio Bonino, Fabio Michieletti, Natascia De Leo, Valentina Brunella, Davide Comoretto, Angelo Angelini, Katia Sparnacci   +8 more
wiley   +1 more source

A comparison of clustering approaches to create sites for occupancy models from opportunistic biodiversity surveys

Methods in Ecology and Evolution, Volume 17, Issue 10, Page 2977-2993, October 2026.
Abstract Opportunistic surveys, such as those archived by citizen science biodiversity inventory programs, can provide species observations over large spans of space and time. Like most biodiversity data, opportunistic reports suffer from imperfect detection of organisms, which can distort species distribution models used for science and natural ...
Nahian Ahmed, Mark Roth, Tyler A. Hallman, W. Douglas Robinson, Rebecca A. Hutchinson   +4 more
wiley   +1 more source

Generalizing the Convex Hull of a Sample: The R Package alphahull [PDF]

This paper presents the R package alphahull which implements the ñ-convex hull and the ñ-shape of a finite set of points in the plane. These geometric structures provide an informative overview of the shape and properties of the point set. Unlike the
Alberto Rodríguez-Casal, Beatriz Pateiro-López   +1 more
core  

Capturing Non‐Linear Neighborhood Structure: An Autoencoder Approach to Census‐Based Dimensionality Reduction for Residential Differentiation

Geographical Analysis, Volume 58, Issue 4, October 2026.
ABSTRACT Dimensionality reduction is fundamental to applied spatial data analysis, condensing high‐dimensional indicators into parsimonious representations for mapping and modeling. Principal component analysis (PCA) remains a dominant approach, yet its linearity assumptions constrain its capacity to capture the complex, non‐linear dependencies ...
Alex Singleton, Owen Goodwin, Stef De Sabbata   +2 more
wiley   +1 more source

Geographical distribution of the Pinnated Bittern (Botaurus pinnatus): Update and seasonal movement pattern

Ibis, Volume 168, Issue 4, Page 1483-1499, October 2026.
The Pinnated Bittern Botaurus pinnatus (Ardeidae) is a widely distributed Neotropical wading bird whose distribution and seasonal status remain poorly resolved. Discrepancies among published literature, citizen science records and the range currently assumed by BirdLife International indicate that both its geographical distribution and migratory ...
Helon Simões Oliveira, Tuany Siqueira‐Silva, Sérgio Roberto Posso, Sidney Feitosa Gouveia   +3 more
wiley   +1 more source

A Novel Model of Conforming Delaunay Triangulation for Sensor Network Configuration

Abstract and Applied Analysis, 2015
Delaunay refinement is a technique for generating unstructured meshes of triangles for sensor network configuration engineering practice. A new method for solving Delaunay triangulation problem is proposed in this paper, which is called endpoint triangle’
Yan Ma, Yan-ling Hao, Feng-min Tian
doaj   +1 more source

Multiphysics Simulation of Positive Streamer Discharge in Air Using Finite Element Method

International Journal for Numerical Methods in Engineering, Volume 127, Issue 18, 30 September 2026.
ABSTRACT Streamer discharge modeling by means of the Finite Element Method (FEM) presents a formidable challenge in computational physics due to its nonlinear and convection‐dominated characteristics that cause numerical instabilities, including negative densities of charged particles.
Hasupama Jayasinghe, Bilen Emek Abali, Liliana Arevalo, Vernon Cooray   +3 more
wiley   +1 more source