Results 221 to 230 of about 726,036 (269)

Thermodynamic Properties of R-227ea, R-365mfc, R-115, and R-13I1

Journal of Chemical & Engineering Data, 2015
Equations of state are presented for the refrigerants 1,1,1,2,3,3,3-heptafluoropropane (R-227ea) and 1,1,1,3,3-pentafluorobutane (R-365mfc). For R-227ea, the uncertainties in densities are 0.05 % in the liquid region up to 360 K, 0.3 % in the vapor phase, and 0.5 % in the supercritical region.
Eric W. Lemmon, Roland Span
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Property (R) for Upper Triangular Operator Matrices

Acta Mathematica Sinica, English Series, 2023
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yang, Li Li, Cao, Xiao Hong
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Thermodynamic Properties of Mixtures of R-32, R-125, R-134a, and R-152a

International Journal of Thermophysics, 1999
A mixture model explicit in Helmholtz energy has been developed that is capable of predicting thermodynamic properties of refrigerant mixtures containing R-32, R-125, R-134a, and R-152a. The Helmholtz energy of the mixture is the sum of the ideal gas contribution, the compressibility (or real gas) contribution, and the contribution from mixing.
E. W. Lemmon, R. T. Jacobsen
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Thermodynamic Properties for R-404A

International Journal of Thermophysics, 1999
An 18-coefficient modified Benedict–Webb–Rubin equation of state has been developed for R-404A, a ternary mixture of 44% by mass of pentafluoroethane (R-125), 52% by mass of 1,1,1-trifluoroethane (R-143a), and 4% by mass of 1,1,1,2-tetrafluoroethane (R-134a).
K. Fujiwara, S. Nakamura, M. Noguchi
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Weighted V@R and its Properties

Finance and Stochastics, 2006
The author considers coherent risk measures \(\rho_\mu (X)\) defined on the space \(L^0\) of all random variables. As usual, these measures are considered on \(L^{\infty}\), so a procedure of extension is described. Then the basic facts about such coherent risk measures as Tail V\@R and Weighted V\@R, two representations of Weighted V\@R and two ...
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New properties of r-Stirling series

Acta Mathematica Hungarica, 2008
The Stirling numbers of the first kind denoted \([{{n}\over {m}}]\) count the number of permutations of \(n\) elements with \(m\) cycles, while the Stirling numbers of the second kind \(\{{{n}\over{m}}\}\) count the number of partitions of a set with \(n\) elements into \(m\) nonempty disjoint subsets. For a positive integer \(r\), let \([{{n}\over {m}}
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Intersection properties of boxes in R d

Combinatorica, 1982
A family of sets is calledn-pierceable if there exists a set ofn points such that each member of the family contains at least one of the points. Helly’s theorem on intersections of convex sets concerns 1-pierceable families. Here the following Helly-type problem is investigated: Ifd andn are positive integers, what is the leasth =h(d, n) such that a ...
Danzer, Ludwig, Grünbaum, Branko
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On the Reswitching Property of R&D

Management Science, 1982
Existing theoretical models of research and development (R&D) treat R&D as a single economic activity. Once R&D terminates, the only way for the activity to resume is by assuming some exogenous changes in the basic parameters of the model, e.g., the distribution of technological advances.
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Magnetic properties of R3Co8Sn4 (R=Y, Gd)

Journal of Magnetism and Magnetic Materials, 2000
Abstract The magnetic properties of the intermetallic phases R3Co8Sn4 (R=Y, Gd) are presented. The two compounds order ferro- (Y) and ferri-magnetically (Gd) with transition temperatures of 61.5 and 102.5 K, respectively. In the paramagnetic region, the Y-compound follows the Curie–Weiss law with μ=0.98 μB/Co and θP=62.0 K while a more complex ...
CANEPA, FABIO MICHELE, NAPOLETANO M., MANFRINETTI, PIETRO, PALENZONA A., CIRAFICI S., F. MERLO   +5 more
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Special properties of the ring Sn(R)

Journal of Algebra and Its Applications, 2017
Let [Formula: see text] be a ring with compatible endomorphisms [Formula: see text]. We investigate the quasi-Armendariz, Armendariz, McCoy, semicommutative properties and Property (A) of the ring [Formula: see text]. Our results yield more examples of quasi-Armendariz rings, Armendariz rings, McCoy rings, semicommutative rings and rings with Property
Zhang, Wanru, Liu, Zhongkui
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