Results 51 to 60 of about 2,027,139 (291)
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 +9 more
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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.
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Advanced Engineering Materials, EarlyView.Binder‐free laser powder bed fusion of 8YSZ with a femtosecond laser is used to map process windows linking scan strategy, heat accumulation, and grain growth. Time‐resolved thermography and simulations reveal thermal regimes that enable continuous, vitrified, and fine‐grained 8YSZ surface layers without absorptive additives and demonstrate ...
Markus Kühn +5 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 +2 more
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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.
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Coverings, Heat Kernels and Spanning Trees [PDF]
The Electronic Journal of Combinatorics, 1998 We consider a graph $G$ and a covering $\tilde{G}$ of $G$ and we study the relations of their eigenvalues and heat kernels. We evaluate the heat kernel for an infinite $k$-regular tree and we examine the heat kernels for general $k$-regular graphs.
Fan R. K. Chung, Shing-Tung Yau
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A survey of kernel and spectral methods for clustering [PDF]
, 2007 Clustering algorithms are a useful tool to explore data structures and have been employed in many disciplines. The focus of this paper is the partitioning clustering problem with a special interest in two recent approaches: kernel and spectral methods ...
Masulli, F. +11 more
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Advanced Engineering Materials, EarlyView.This study examines Invar composites reinforced with titanium carbide (TiC) and titanium nitride (TiN) using laser powder bed fusion (LPBF). It presents the influence of reinforcements on microstructure, tensile properties, and thermal expansion. Results show that TiC effectively strengthens Invar while maintaining low thermal expansion, whereas TiN ...
Ayodeji Nathaniel Oyedeji +3 more
wiley +1 more source
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
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Thermal quadrupole method with internal heat sources [PDF]
, 2012 A new method based on the thermal quadrupoles technique for heat transfer modelling in multilayered slabs with heat sources is proposed. Classical thermal quadrupoles use hyperbolic functions and numerical problems occur according to the argument value ...
A. Kusiak +21 more
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