Computer simulators are often used as a substitute of complex real-life phenomena, which either expensive or infeasible to experiment with. This paper focuses on how efficiently solve the inverse problem for an evaluate time-series-valued computer simulator. The research is motivated by hydrological simulator has be tuned generating realistic rainfall–runoff measurements in Athens, Georgia, USA...

Abstract A pore-scale forward modelling approach for NMR relaxation responses of sandstones incorporating their dual-scale nature is presented. The utilises X-ray micro-CT images to capture inter-granular porosity and scanning electron microscopy reconstruct clay regions via a resolved micro-structure model. key calculating the response with development internal magnetic field calculation. This...

In this paper we consider two recovery problems based on information given with an error. First is the problem of optimal class $W^T_q = \{(t_1h_1,t_2h_2,\ldots)\in \ell_q\,:\,\|h\|_q\leqslant 1\}$, where $1\le q < \infty$ and $t_1\geqslant t_2\geqslant \ldots \geqslant 0$, in space $\ell_q$ when capacity inexact know either first $n\in\mathbb{N}$ elements a sequence error measured finite seque...

We report the results of new XMM-Newton observations middle-aged ($\sim$10$^5$ yr) radio pulsar PSR J1740+1000 carried out in 2017-2018. These long pointings ($\sim$530 ks) show that non-thermal emission, well described by a power-law spectrum with photon index $\Gamma=1.80\pm0.17$, is pulsed $\sim$30% fraction above 2 keV. The thermal emission can be fit sum two blackbodies temperatures $kT_1=...

Context: We present a new study of the eclipsing cataclysmic variable CzeV404 Her (Porb = 0.098 d) that is located in period gap. Aims: This report determines origin object and system parameters probes accretion flow structure system. Methods: conducted simultaneous time-resolved photometric spectroscopic observations Her. applied our light-curve modelling techniques Doppler tomography method t...

When the number of strongly correlated electrons becomes larger, single-reference coupled-cluster (CC) CCSD, CCSDT, etc. hierarchy displays an erratic behavior, while traditional multi-reference approaches may no longer be applicable due to enormous dimensionalities underlying model spaces. These difficulties can alleviated by approximate coupled-pair (ACP) theories, in which selected $(T_2)^2$...

The B20-type cobalt germanide CoGe was investigated by measuring the specific heat, resistivity, and $^{59}$Co nuclear magnetic resonance (NMR). We observed a phase transition at $T_Q=13.7$ K, evidenced very narrow peak of heat sharp changes spin-spin ($T_2^{-1}$) spin-lattice ($T_1^{-1}$) relaxation rates. fact that entropy release is extremely small Knight shift almost independent temperature...

Abstract Quantum systems are under various unwanted interactions due to their coupling with the environment. Efficient control of quantum system is essential for information processing. Weak-coupling ubiquitous, and it very difficult suppress them using optimal method, because operation at a time scale coherent life system. Nitrogen-vacancy (NV) center diamond promising platform The $$^{13}$$ <...

Motivated by the potential for cuprate-like superconductivity in monolayer rare-earth nickelate superlattices, we study effects of crystal field splitting, lattice distortions and strain on charge, magnetic, orbital order undoped two-dimensional (2D) monolayers $R$NiO$_3$. We use a two-band Hubbard model to describe low-energy electron states, with correlations controlled effective $U$ Hund's $...

Abstract We study and classify smooth bounded domains in an analytic Riemannian manifold which are critical for the heat content at all times $$t&gt;0$$ t &gt; 0 . do that by first computing variation of content, then showing $$\Omega $$ Ω</mml:...