Results 21 to 30 of about 2,591,994 (263)
Methods of symmetry reduction and their application. [PDF]
, 2022 In this thesis methods of symmetry reduction are applied to several physically relevant partial differential equations. The first chapter serves to acquaint the reader with the symmetry methods used in this thesis. In particular the classical method of Lie, an extension of it by Bluman and Cole [1969], known as the nonclassical method, and the direct ...
openaire +1 more source
Resonant semilinear Robin problems with a general potential
Electronic Journal of Qualitative Theory of Differential Equations, 2017 We consider a semilinear Robin problem driven by the Laplacian plus an indefinite and unbounded potential. The reaction term is a Carath\'eodory function which is resonant with respect to any nonprincipal eigenvalue both at $\pm \infty$ and 0.
Nikolaos Papageorgiou +2 more
doaj +1 more source
Research on Organic Acids in Fruit Wine and Acid Reduction Strategies
Shipin gongye ke-ji, 2023 The type and content of organic acids have important influence on the quality of fruit wine. Proper amount of organic acids can give fruit wine soft taste, and has certain antibacterial effect.
Ying CAO +5 more
doaj +1 more source
Reliability Equivalence Factors for Coherent System using Survival Signature [PDF]
International Journal of Mathematical, Engineering and Management SciencesThis study presents a methodology aimed at enhancing the performance of coherent systems through the application of survival signature analysis, focusing on the calculation of reliability equivalence factors (REFs).
Deepak, Garima Chopra, Deeksha
doaj +1 more source
Damage Detection of Truss Structures by Reduction of Degrees of Freedom Using the Serep Method
The Baltic Journal of Road and Bridge Engineering, 2020 Damage detection of bridge structures during their operating lifetime is essential. In this paper, two approaches, All Degrees of Freedom and Reduction of the Degrees of Freedom methods, are used to detect the damages in structures.
Shahin Lale Arefi, Amin Gholizad
doaj +1 more source
ShakerMaker: A framework that simplifies the simulation of seismic ground-motions
SoftwareX, 2022 ShakerMaker is an open-source python framework which simplifies the generation of synthetic broad-band seismograms, produced by finite-fault kinematic representations of earthquake ruptures, using a 1-D layered model of the crust and the frequency ...
José A. Abell +2 more
doaj +1 more source
NanomaterialsAn enormous quantity of titanium slag has caused not merely serious environment pollution, but also a huge waste of iron and sulfur resources. Hence, recycling iron and sulfur resources from titanium slag has recently been an urgent problem.
Genkuan Ren, Yinwen Deng, Xiushan Yang
doaj +1 more source
Justification of the reduction method using the zero field method
Вісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2022 Relevance. The urgency of the task is due primarily to progress in the field of computer technology and the growth in the power of modern personal computers.
D. O. Batrakov
doaj +1 more source
Existence of normalized peak solutions for a coupled nonlinear Schrödinger system
Advances in Nonlinear AnalysisIn this article, we study the following nonlinear Schrödinger system −Δu1+V1(x)u1=αu1u2+μu1,x∈R4,−Δu2+V2(x)u2=α2u12+βu22+μu2,x∈R4,\left\{\begin{array}{ll}-\Delta {u}_{1}+{V}_{1}\left(x){u}_{1}=\alpha {u}_{1}{u}_{2}+\mu {u}_{1},& x\in {{\mathbb{R}}}^{4},\\
Yang Jing
doaj +1 more source
Iterative solution of elliptic equations
Electronic Journal of Qualitative Theory of Differential Equations, 2022 We reduce solution of the Dirichlet problem ($x \in D \subset R^m$) \[ \Delta u(x)+a(x)u(x)=f(x) \quad \mbox{in $D$}, \qquad u=0 \quad \mbox{on $\partial D$} \] to iterative solution of a simpler problem \[ \Delta u=f(x) \; \; \mbox{in $D$}, \; \; u=0
Philip Korman, Dieter Schmidt
doaj +1 more source