Results 41 to 50 of about 3,926,530 (307)

Quantification of Vessel Density in Retinal Optical Coherence Tomography Angiography Images Using Local Fractal Dimension.

Investigative Ophthalmology and Visual Science, 2016
PURPOSE To evaluate a fully automated local fractal dimension method to quantify vessel density and foveal avascular zone (FAZ) area in optical coherence tomography angiography (OCTA) images.
Rong Hu, Chun Ding
semanticscholar   +1 more source

From rock microstructure to macromechanical properties based on fractal dimensions

Advances in Mechanical Engineering, 2019
Basic rock mechanical parameters, that is, the uniaxial compressive strength σ c and elastic modulus E , have close relationships with the fractal dimension and inhomogeneity.
Dongmei Huang, Xikun Chang, Yunliang Tan, Kai Fang, Yanchun Yin   +4 more
doaj   +1 more source

Numerical Simulation of Rockfill Materials Based on Fractal Theory

Applied Sciences, 2021
With the use of the particle flow code in two dimensions, a fractal model is established with the number of particles of different particle fractions used as the statistics to study the fractal characteristics of particle size distribution.
Hongxing Han, Yun Ma, Wei He, Weifang Yang, Xudong Fu   +4 more
doaj   +1 more source

Patterning the Void: Combining L‐Systems with Archimedean Tessellations as a Perspective for Tissue Engineering Scaffolds

Advanced Functional Materials, EarlyView.
This study introduces a novel multi‐scale scaffold design using L‐fractals arranged in Archimedean tessellations for tissue regeneration. Despite similar porosity, tiles display vastly different tensile responses (1–100 MPa) and deformation modes. In vitro experiments with hMSCs show geometry‐dependent growth and activity. Over 55 000 tile combinations
Maria Kalogeropoulou, Kenny A. van Kampen, Pierpaolo Fucile, Carlos Mota, Lorenzo Moroni   +4 more
wiley   +1 more source

Incidencia del tamaño de la ventana en la calidad de las imágenes fusionadas mediante mapas de dimensión fractal [PDF]

, 2010
El objetivo de este trabajo es investigar la influencia del tamaño de ventana (wsize) utilizado en un nuevo paradigma de fusión que pretende minimizar los efectos de alta variabilidad espacial y baja separabilidad espectral que caracterizan a las ...
Gonzalo Martín, Consuelo, Lillo Saavedra, Mario Fernando   +1 more
core   +1 more source

Supraparticles Composed of Graphitic Carbon Nitride Nanoparticles and Silica‐Supported Horseradish Peroxidase as Customizable Hybrid Catalysts for Photo‐Biocatalytic Cascade Reactions in Continuous Flow

Advanced Functional Materials, EarlyView.
Herein presented supraparticles combine the nanoparticulate photocatalyst graphitic carbon nitride with the enzyme horseradish peroxidase, which is immobilized on silica nanoparticles. In an optimized compatibility range, both catalysts operate effectively within the hybrid supraparticles and catalyze a cascade reaction consisting of the photocatalytic
Bettina Herbig, Egzon Cermjani, Doris Hanselmann, Johannes Prieschl, Angelika Schmitt, Michael S. Moritz, Christian Papp, Greta Nölke, Stefano Di Fiore, Christoph Deckers, Thomas H. Rehm, Susanne Wintzheimer   +11 more
wiley   +1 more source

Fusión iHS Ponderada Mediante Dimensión Fractal [PDF]

, 2008
En este trabajo, se ha utilizado la capacidad de la dimensión fractal para distinguir entre zonas con diferentes características texturales. En base a ello, se propone utilizar mapas de dimensión fractal local, de las imágenes fuentes a fusionar, para ...
Gonzalo Martín, Consuelo, Lillo Saavedra, Mario Fernando, Merino, Francisco J., Zambrano, Francisco   +3 more
core   +1 more source

Multiband Switchable Microwave Absorbing Metamaterials Based on Reconfigurable Kirigami–Origami

Advanced Functional Materials, EarlyView.
A reconfigurable metamaterial featuring tunable microwave‐absorbing and load‐bearing performance is proposed. Stretchable kirigami and bistable origami configurations are integrated as actuating components, and the synergistic deformation mechanisms are systematically analyzed.
Weimin Ding, Zhong Zhang, Zeang Zhao, Shengyu Duan, Panding Wang, Xiaogang Guo, Hongshuai Lei, Daining Fang   +7 more
wiley   +1 more source

Sucesiones y la dimensión fractal [PDF]

, 2012
A través de una serie de problemas, cuya solución nos sumerge en el mundo matemático de los procesos infinitos, en forma natural se llega a la idea de sucesión y límite de una sucesión. En algunos de los problemas planteados aparecen objetos geométricos,
Hernández, Luis
core  

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

Advanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker, Robert Winkler, Ulrich Hohenester, Evelin Fisslthaler, Daniel Knez, Gerald Kothleitner, Georg Haberfehlner   +6 more
wiley   +1 more source