Results 61 to 70 of about 24,625 (256)

Compensation of Gaussian curvature in developable cones is local [PDF]

open access: yesPhysical Review E, 2009
12 pages; 5 ...
Wang, Jin W., Witten, Thomas A.
openaire   +3 more sources

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

open access: yesAdvanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi   +3 more
wiley   +1 more source

Prescribing Gaussian curvature on $R^2$ [PDF]

open access: yesProceedings of the American Mathematical Society, 1997
The author derives a sufficient condition for a radially symmetric function \(K(x)\) which is positive somewhere to be a conformal curvature on \(\mathbb{R}^2\). In particular, it is shown that every nonnegative radially symmetric continuous function \(K(x)\) on \(\mathbb{R}^2\) is a conformal curvature. This is equivalent to the problem of solving the
openaire   +1 more source

A Practical Noise2Noise Denoising Pipeline for High‐Throughput Raman Spectroscopy

open access: yesAdvanced Engineering Materials, EarlyView.
A lightweight and reproducible denoising pipeline for high‐throughput Raman spectroscopy is introduced, based on a 1D convolutional autoencoder trained with a Noise2Noise strategy. Using only repeated short‐exposure acquisitions, the method suppresses stochastic noise without reference spectra, enabling reliable spectral reconstruction while preserving
David Martin‐Calle   +5 more
wiley   +1 more source

Surfaces of a Constant Negative Curvature

open access: yesInternational Journal of Differential Equations, 2012
I study the geometric notion of a differential system describing surfaces of a constant negative curvature and describe a family of pseudospherical surfaces for the nonlinear partial differential equations with constant Gaussian curvature .
G. M. Gharib
doaj   +1 more source

Neural decision boundaries for maximal information transmission. [PDF]

open access: yesPLoS ONE, 2007
We consider here how to separate multidimensional signals into two categories, such that the binary decision transmits the maximum possible information about those signals.
Tatyana Sharpee, William Bialek
doaj   +1 more source

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

open access: yesAdvanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati   +11 more
wiley   +1 more source

Uniform Amorphization of Crystalline Silicon Surfaces Enabled by Deep Ultraviolet Femtosecond Laser Pulses

open access: yesAdvanced Engineering Materials, EarlyView.
Deep‐UV (258 nm) femtosecond pulses enable uniform amorphous silicon writing on Si(100)/(111) with a six‐fold larger fluence amorphization window than NIR methods. Optimized fluence and overlap yield 20–45 nm uniform and continuous amorphous layers. Microscopy shows sharp interfaces, and real‐time reflectivity reveals nanosecond melt–resolidification ...
Wissal Benali   +5 more
wiley   +1 more source

An Online Rapid Mesh Segmentation Method Based on an Online Sequential Extreme Learning Machine

open access: yesIEEE Access, 2019
The existing mesh segmentation methods currently require long training times and have high computational complexity. Consequently, many of these methods cannot meet the rapid requirements of digital geometry processing in the Web environment.
Feiyu Zhao   +5 more
doaj   +1 more source

On the curvatures of Gaussian random field manifolds

open access: yesCoRR, 2021
Information geometry is concerned with the application of differential geometry concepts in the study of the parametric spaces of statistical models. When the random variables are independent and identically distributed, the underlying parametric space exhibit constant curvature, which makes the geometry hyperbolic (negative) or spherical (positive ...
openaire   +2 more sources

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