Results 41 to 50 of about 953 (217)

Creep‐Induced Microstructural Evolution in an A2‐B2 Superalloy

Advanced Engineering Materials, EarlyView.
A 27.3Ta‐27.3Mo‐27.3Ti‐8Cr‐10Al (at.%) refractory high‐entropy alloy with precipitation‐strengthened A2‐B2 microstructure was studied by creep tests at 1030°C, which demonstrate a transition in deformation mechanisms in the range of 100–150 MPa applied stress. This is associated with changes in dislocation–precipitate interactions. Relevant deformation
Liu Yang, Aparajita Pramanik, Sandipan Sen, Shubhashis Dixit, Marcel Muench, R. J. Vikram, Daniel Schliephake, Yolita M. Eggeler, Ankur Chauhan, Martin Heilmaier, Alexander Kauffmann   +10 more
wiley   +1 more source

Impacts of Heat Stress around Flowering on Growth and Development Dynamic of Maize (Zea mays L.) Ear and Yield Formation

Plants, 2022
Heat stress around flowering is harmful to maize growth and yield. Ear traits are closely related to yield; however, the effects of heat stress before and after flowering on ear development and yield traits remain unclear for different heat-tolerant ...
Na Wang, Qi Liu, Bo Ming, Wenxin Shang, Xuefeng Zhao, Xuqing Wang, Jing Wang, Junlong Zhang, Zhongkui Luo, Yong Liao   +9 more
doaj   +1 more source

Heat kernel and scaling of gravitational constants [PDF]

Physical Review D, 1995
We consider the non-local energy-momentum tensor of quantum scalar and spinor fields in $2 w$-dimensional curved spaces. Working to lowest order in the curvature we show that, while the non-local terms proportional to $\Box {\cal R}$, $\Box \Box{\cal R}$, $\ldots, \Box^{w-2} {\cal R}$ are fully determined by the early-time behaviour of the heat kernel,
Dalvit, D. A. R., Mazzitelli, F. D.
openaire   +3 more sources

Influence of Test Temperature and Test Frequency on Fatigue Life of Aluminum Alloy EN AW‐2618A

Advanced Engineering Materials, EarlyView.
The influence of test temperature and test frequency on the fatigue life of EN AW‐2618A is investigated. High‐cycle fatigue tests are performed at different test temperatures and frequencies on the 1000 h/230°C overaged state. Both test parameters reduce fatigue life due to time‐dependent damage mechanisms.
Ying Han, Julian M. Rosalie, Jan Radners, Mauro Madia, Philipp von Hartrott, Birgit Skrotzki   +5 more
wiley   +1 more source

On the generalised heat kernel

Вычислительные технологии, 2004
The authors investigate the equation \(\frac{\partial}{\partial t}u(x,t)=-c^2(-\triangle)^ku(x,t)\) with the initial conditions \(u(x,0)=f(x)\), where \(x\in{\mathbb R}^n\). The operator \(\triangle^k\) is said to be the Laplace operator iterated \(k\) times and is defined as \(\triangle^k=(\frac{\partial^2}{\partial x_1^2}+ \frac{\partial^2}{\partial ...
Nonlaopon, К., Kananthai, A.
openaire   +2 more sources

Artin formalism and heat kernels

Journal für die reine und angewandte Mathematik (Crelles Journal), 1994
The Artin formalism for \(L\)-series of number fields is known to be satisfied in topology, in the context of the characteristic polynomial in linear algebra, when one has an endomorphism acting functorially on some representation spaces associated with a finite covering.
Lang, Serge, Jorgenson, Jay
openaire   +2 more sources

Heat Kernels of Metric Trees and Applications [PDF]

SIAM Journal on Mathematical Analysis, 2013
We consider the heat semi-group generated by the Laplace operator on metric trees. Among our results we show how the behavior of the associated heat kernel depends on the geometry of the tree. As applications we establish new eigenvalue estimates for Schroedinger operators on metric trees.
Rupert L. Frank, Hynek Kovarík
openaire   +3 more sources

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

Gradient estimates for a weighted nonlinear parabolic equation and applications

Open Mathematics, 2020
This paper derives elliptic gradient estimates for positive solutions to a nonlinear parabolic equation defined on a complete weighted Riemannian manifold.
Abolarinwa Abimbola, Oladejo Nathaniel K., Salawu Sulyman O.   +2 more
doaj   +1 more source

An estimate on the hessian of the heat kernel [PDF]

Journées équations aux dérivées partielles, 1995
Summary: Let \(M\) be a compact, connected Riemannian manifold, and let \(p_t(x,y)\) denote the fundamental solution to Cauchy initial value problem for the heat equation \({\partial u\over\partial t}={1\over 2} \Delta u\), where \(\Delta\) is the Levi-Civita Laplacian.
openaire   +2 more sources