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61.
Summary The nonlinear CCSDTQ equations are written in a fully linearized form, via the introduction of computationally convenient intermediates. An efficient formulation of the coupled cluster method is proposed. Due to a recursive method for the calculation of intermediates, all computational steps involve the multiplication of an intermediate with aT vertex. This property makes it possible to express the CC equations exclusively in terms of matrix products which can be directly transformed into a highly vectorized program.This work has been supported by the U.S. Air Force Office of Scientific Research, Grant No. 90-0079 相似文献
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We present a network of delay log2N, whose comparators have only log2N different lengths with maximum length N/2. This network is log-sequential in that it will sort N data items when they are passed through it log2Ntimes. The design, which is related to the Batcher odd-even merge, is distinctly different from the first known example of a log-delay log-sequential network, due to Dowd, Perl, Rudolf, and Saks. It is quite probably the best possible sorting network. 相似文献
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Rodney W. Benoist Jean-Paul Marchand Wolfgang Yourgrau 《Foundations of Physics》1977,7(11-12):827-833
We analyze the quantum mechanical measuring process from the standpoint of information theory. Statistical inference is used in order to define the most likely state of the measured system that is compatible with the readings of the measuring instrument and the a priori information about the correlations between the system and the instrument. This approach has the advantage that no reference to the time evolution of the combined system need be made. It must, however, be emphasized that the result is to be interpreted as the statistically inferred state of the original system rather than the state of the system after measurement. The phenomenon of “reduction of states” appears in this light as a consequence of incomplete information rather than the physical interaction between measured system and measuring instrument. 相似文献
67.
Rodney J. Baxter 《Journal of statistical physics》1973,9(2):145-182
The order parameter of the two-dimensionalF-model, namely the spontaneous staggered polarizationP
0, is derived exactly. At the critical temperatureP
0 has an essential singularity, bothP
0 and all its derivatives with respect to temperature vanishing. 相似文献
68.
Gerald J. Smith Rodney F. C. Claridge Carolyn J. Smith 《Photochemistry and photobiology》1979,29(4):777-779
Abstract—The action spectra have been determined for two free radical species produced by irradiating wool protein containing bound iron(III) ions with light between 330 and 540 nm. The faster growing free radical displays an action spectrum with a peak at 405–415 nm. It is suggested that an iron (III) ion-sulphur complex is the chromophore responsible for the formation of this carbon type radical. 相似文献
69.
Excitation functions of the 15N(p, γ)16O proton capture reaction have been obtained at θγ = 45° and Ep = 150–2500 keV. Below Ep = 400 keV, the reaction is dominated by capture into the ground state of 16O. The observed excitation function for the latter process can be explained if, in addition to the two well-known Jπ = 1? resonances at Ep = 338 and 1028 keV, a direct radiative capture process (DC → 0) is included in the analysis. The direct capture component in the capture reaction is enhanced through interference effects on the tails of the two resonances. From the observed direct capture cross section, a single-particle spectroscopic factor of C2S(1p) = 1.8 ± 0.4 has been deduced for the ground state in 16O. The extrapolated astrophysical S-factor of S(0) = 64 ± 6 keV · b for the 15N(p, γ0)16O reaction is a factor of 2.5 larger than previously reported. This result amplifies the role of the oxygen side cycle in the CNO hydrogen burning process.The observed excitation function of the 15N(p, α1γ1)12C reaction at Ep = 150 – 2500 keV shows that this reaction makes a negligible contribution to hydrogen burning at stellar energies [S(0) ≈ 0.1 keV · b] compared to . 相似文献
70.