Results 31 to 40 of about 9,107 (262)

Fractal dimension based geographical clustering of COVID-19 time series data

Scientific Reports, 2023
Understanding the local dynamics of COVID-19 transmission calls for an approach that characterizes the incidence curve in a small geographical unit. Given that incidence curves exhibit considerable day-to-day variation, the fractal structure of the time ...
Yessika Adelwin Natalia, Christel Faes, Thomas Neyens, Pieter Chys, Naïma Hammami, Geert Molenberghs   +5 more
doaj   +1 more source

Volatility Similarities of Stock Prices within the Same Industries

Recoletos Multidisciplinary Research Journal, 2013
It is prevalently known in finance, and even economics, that prices are the market players’ reflection of its collective reaction to the market. Market players’ perceptions on an industry may have direct effects on the volatility levels of its member ...
Chris Rudyard F. Naval, Kristine June D. Uy   +1 more
doaj   +1 more source

The Fractal Characterization of Mechanical Surface Profile Based on Power Spectral Density and Monte-Carlo Method

E3S Web of Conferences, 2018
The analysis of rough surface morphology plays an important role in the functional characteristics of the contact surface of mechanical parts. Fractal geometry method is more accurate and sensitive than classical statistics model.
Shen Jingfang, Gong Yuqi, Meng Hang, Yang Jiajun   +3 more
doaj   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Historical Foundation and Practical Guideline for Ferroelectric Switching Kinetic Studies

Advanced Functional Materials, EarlyView.
The P and U pulses in the conventional PUND measurements are not identical because of the interplay between switching current and the measurement circuit components. This circuit effect can lead to a shift in polarization transients and misinterpreted physics in the switching kinetics.
Yi Liang, Pat Kezer, John T. Heron
wiley   +1 more source

Power Metal Corrosion Evaluation Method Based on Image Feature Analysis

Journal of Harbin University of Science and Technology, 2021
In order to quickly and effectively diagnose the metal corrosion state of power equipment，the corrosion image of the metal material Q235 steel in the hanging piece experiment of the substation was analyzed，and a metal corrosion state evaluation method ...
ZHONG Yao, ＲEN Xiao, WU Gao-lin, WANG Qian, WANG Xu-peng, HAO Jian   +5 more
doaj   +1 more source

Fusogenic RNA Nanomodules for Fusion‐Mediated and Multiplexed siRNA Delivery

Advanced Functional Materials, EarlyView.
A fusogenic lipid‐layered RNA nanomodules (L‐CRAMs) enable high‐capacity and long‐lasting siRNA delivery through membrane fusion. These nanomodules carry exceptionally large siRNA payloads, avoid conventional endosomal uptake, and release multiple functional siRNAs through Dicer‐mediated processing.
Sunghyun Moon, Iksoo Jang, Taehyeon Kim, Nayoung Yoon, Kyuha Yum, Jong Bum Lee   +5 more
wiley   +1 more source

Fractal Geometric Model for Statistical Intermittency Phenomenon

Entropy, 2023
The phenomenon of intermittency has remained a theoretical concept without any attempts to approach it geometrically with the use of a simple visualization. In this paper, a particular geometric model of point clustering approaching the Cantor shape in 2D, with a symmetry scale θ being an intermittency parameter, is proposed.
Tarraf, Walid, Queiros-Condé, Diogo, Ribeiro, Patrick, Absi, Rafik   +3 more
openaire   +3 more sources

Water Permeates and Plasticizes Amorphous Carbon Dots: Unraveling the Inner Accessibility of the Nanoparticles by Glass Transition Studies

Advanced Materials, EarlyView.
The water permeability of amorphous carbon dots (CDs) is demonstrated by investigating their plasticization. Novel polyamide‐based and amorphous nanoparticles are synthesized by controlling their inner packing density. Water plasticization is evidenced by the decrease of the CDs glass transition temperature with increasing the hydration degree.
Elisa Sturabotti, Valerio Di Lisio, Lucia Cardo, Alessandro Camilli, Estela Moretón Alfonsín, Daniele Cangialosi, Amaia Iturrospe Ibarra, Arantxa Arbe, Maurizio Prato   +8 more
wiley   +1 more source

Behavioral fractal method associated with GPS tracking to spatial activity sequences of grazing cattle

Scientia Agricola, 2022
Global positioning and geographic information systems are essential for studying foraging animal behavior. This study aims to implement a fractal self-similarity and chaos game computational efficient methodology to determine the behavior-associated ...
Miguel Armando Rodriguez Marquez, Héctor Andrés Granada Díaz, Jairo Mora Delgado   +2 more
doaj   +1 more source