Zobrazeno 1 - 10
of 3 687
pro vyhledávání: '"A. Loescher"'
Autor:
Y. Wang, G. Broquet, F.-M. Bréon, F. Lespinas, M. Buchwitz, M. Reuter, Y. Meijer, A. Loescher, G. Janssens-Maenhout, B. Zheng, P. Ciais
Publikováno v:
Geoscientific Model Development, Vol 13, Pp 5813-5831 (2020)
This study assesses the potential of satellite imagery of vertically integrated columns of dry-air mole fractions of CO2 (XCO2) to constrain the emissions from cities and power plants (called emission clumps) over the whole globe during 1 year. The i
Externí odkaz:
https://doaj.org/article/7ce2df84ed4b4c43ae3daf7c5158b7af
We consider a distributed optimal control problem subject to a parabolic evolution equation as constraint. The control will be considered in the energy norm of the anisotropic Sobolev space $[H_{0;,0}^{1,1/2}(Q)]^\ast$, such that the state equation o
Externí odkaz:
http://arxiv.org/abs/2404.10350
We propose, analyze, and test new robust iterative solvers for systems of linear algebraic equations arising from the space-time finite element discretization of reduced optimality systems defining the approximate solution of hyperbolic distributed,
Externí odkaz:
http://arxiv.org/abs/2404.03756
Autor:
Y. Wang, P. Ciais, G. Broquet, F.-M. Bréon, T. Oda, F. Lespinas, Y. Meijer, A. Loescher, G. Janssens-Maenhout, B. Zheng, H. Xu, S. Tao, K. R. Gurney, G. Roest, D. Santaren, Y. Su
Publikováno v:
Earth System Science Data, Vol 11, Pp 687-703 (2019)
A large fraction of fossil fuel CO2 emissions emanate from “hotspots”, such as cities (where direct CO2 emissions related to fossil fuel combustion in transport, residential, commercial sectors, etc., excluding emissions from electricity-producin
Externí odkaz:
https://doaj.org/article/bfc5e66f1bca43b29961acac2f3c243b
In this paper, we analyze the discrete inf-sup condition and related error estimates for a modified Hilbert transformation as used in the space-time discretization of time-dependent partial differential equations. It turns out that the stability cons
Externí odkaz:
http://arxiv.org/abs/2402.08291
We propose, analyze, and test new iterative solvers for large-scale systems of linear algebraic equations arising from the finite element discretization of reduced optimality systems defining the finite element approximations to the solution of ellip
Externí odkaz:
http://arxiv.org/abs/2312.12282
In this paper, we recast the variational formulation corresponding to the single layer boundary integral operator $\operatorname{V}$ for the wave equation as a minimization problem in $L^2(\Sigma)$, where $\Sigma := \partial \Omega \times (0,T)$ is t
Externí odkaz:
http://arxiv.org/abs/2312.12547
We consider the numerical solution of an abstract operator equation $Bu=f$ by using a least-squares approach. We assume that $B: X \to Y^*$ is an isomorphism, and that $A : Y \to Y^*$ implies a norm in $Y$, where $X$ and $Y$ are Hilbert spaces. The m
Externí odkaz:
http://arxiv.org/abs/2309.14300
Autor:
Löscher, Robin, Moreno, Victor, Adamou, Dionysis, Kesim, Denizhan K., Schroeder, Malte C., Clerici, Matteo, Wolf, Jean-Pierre, Saraceno, Clara J.
Publikováno v:
APL Photonics 8, 111303 (2023)
Filamentation has extensively been explored and is well understood at repetition rates <1 kHz due to the typical availability of multi-mJ laser systems at a moderate average power. The advent of high-power Yb-lasers opened new possibilities for filam
Externí odkaz:
http://arxiv.org/abs/2309.03636
In this paper we discuss the numerical solution of elliptic distributed optimal control problems with state or control constraints when the control is considered in the energy norm. As in the unconstrained case we can relate the regularization parame
Externí odkaz:
http://arxiv.org/abs/2306.15316