Results 81 to 90 of about 9,502,067 (333)
ChemCatChem, Accepted Article.The activation of electron poor allenes with Lewis base catalysts allows for unique transformations and chiral isochalcogenoureas were recently introduced as powerful catalysts for allenoate‐based (4+2)‐cycloadditions. We herein now report the use of these catalysts for the activation and control of allenylsulfones and propargylsulfones for asymmetric (
Mario Hofer +3 more
wiley +1 more source
Energies, 2022 This paper presents the design optimization of a heat exchanger for a free-piston Stirling engine (FPSE) through an improved quasi-steady flow (iQSF) model and a central composite design.
Dong-Jun Kim +3 more
doaj +1 more source
Lagrange inversion and Stirling number convolutions [PDF]
, 2014 Recently Agoh and Dilcher proved a convolution identity involving Stirling numbers S(n, r) of the second kind. We prove an identity where S(n, r) is replaced by a more general doubly-indexed family A(n, r).
Chapman, Robin
core
Chemistry–Methods, EarlyView.The TMPHOTCAT‐137 database is introduced and employed for benchmarking DFT functionals. The database contains the digitized UV‐vis spectra for 137 transition metal photocatalysts together with optimized vertical absorption spectra calculated using 14 different DFT functionals.
Péter Pál Fehér, András Stirling
wiley +1 more source
Bell Numbers of Complete Multipartite Graphs [PDF]
Computer Science Journal of Moldova, 2016 The {\it Stirling number} $S(G;k)$ is the number of partitions of the vertices of a graph $G$ into $k$ nonempty independent sets and the number of all partitions of $G$ is its {\it Bell number}, $B(G)$.
Julian Allagan, Christopher Serkan
doaj
A new approach to the r-Whitney numbers by using combinatorial differential calculus
Acta Universitatis Sapientiae: Mathematica, 2019 In the present article we introduce two new combinatorial interpretations of the r-Whitney numbers of the second kind obtained from the combinatorics of the differential operators associated to the grammar G := {y → yxm, x → x}.
Méndez Miguel A., Ramírez José L.
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IET Renewable Power Generation, 2023 At present, commercial geothermal power stations are mainly high‐temperature and medium‐temperature geothermal energy, while the large number of low‐temperature geothermal energy resources are rarely used for power generation applications.
Tan Zhili +3 more
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Communications on Pure and Applied Mathematics, EarlyView.Abstract The problem of deriving a gradient flow structure for the porous medium equation which is thermodynamic, in that it arises from the large deviations of some microscopic particle system is studied. To this end, a rescaled zero‐range process with jump rate g(k)=kα,α>1$g(k)=k^\alpha, \alpha >1$ is considered, and its hydrodynamic limit and ...
Benjamin Gess, Daniel Heydecker
wiley +1 more source
Energy Science & Engineering, 2021 In a numerical analysis of a Stirling engine, the thermal and flow fields in the cylinder are three‐dimensional and periodically varying. Therefore, a computational fluid dynamic (CFD) analysis may provide detailed solution but it takes a long ...
Chin‐Hsiang Cheng, Duc‐Thuan Phung
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Pascal matrices and Stirling numbers
Applied Mathematics Letters, 1998 AbstractThis paper presents some relationships between Pascal matrices, Stirling numbers, and Bernouilli numbers.
P. Maltais, T.A. Gulliver
openaire +2 more sources