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141.
142.
Carl H. Albright 《Nuclear Physics B》1974,75(3):539-545
Charmed-particle production by neutrinos is investigated with the quark parton model formalism. Emphasis is placed on the largest effects which can be tolerated by the present experimental data as well as those suggested by more conventional parton models. 相似文献
143.
Carl J Seliskar 《Journal of Molecular Spectroscopy》1974,53(2):140-149
Measurements of the electronic absorption spectra of vapor- and solution-phase salicylaldehydes are reported for wavelengths ≥1900 Å. Three intense absorption band systems are readily assigned as transitions by comparison with all-valence-electron computations. Moderate vibrational structure in the transitions of isotopic salicylaldehydes is analyzed and tentative assignments are made for the coupled vibrations. 相似文献
144.
Keane JM Chordia MD Mocella CJ Sabat M Trindle CO Harman WD 《Journal of the American Chemical Society》2004,126(21):6806-6815
A series of metal complexes was synthesized in which arenes were dihapto-coordinated to pi-basic metal fragments having the general form [TpM(pi-acid)(L)], where Tp = hydridotris(pyrazolyl)borate, M = rhenium, molybdenum, or tungsten, pi-acid = CO or NO(+), and L = 1-methylimidazole, 1-butylimidazole, pyridine, or trimethylphosphine. The arene complexes were shown to be significantly more basic than the analogous pentaammineosmium(II) arene complexes and were protonated by moderate acids to give remarkably stable eta(2) and eta(3) arenium cation complexes. A crystal structure of [TpRe(CO)(MeIm)(5,6-eta(2)-2H-anisolium)](OTf) confirmed the eta(2) coordination of the anisolium ligand, but suggests a weak long-range interaction between the metal and C1 of the anisolium. 相似文献
145.
Carl Ludwig Siegel 《Mathematische Annalen》1959,137(5):427-432
Ohne Zusammenfassung 相似文献
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Abstract— A methodology for the determination of chemiluminescence quenching terms is given. By using the oxidation of tetrakis(dimethylamino)ethylene as an example, it is shown how the nature and magnitude of the quenching terms help to elucidate the reaction mechanism, or how ignoring them can lead to false impressions. It is shown that chemiluminescence quenching effects need not be the same as those for photoluminescence of the same electronically excited species. 相似文献
150.
Vincent T’kindt Karima Bouibede-Hocine Carl Esswein 《4OR: A Quarterly Journal of Operations Research》2005,3(1):1-21
In this paper we tackle an important point of combinatorial optimisation: that of complexity theory when dealing with the counting or enumeration of optimal solutions. Complexity theory has been initially designed for decision problems and evolved over the years, for instance, to tackle particular features in optimisation problems. It has also evolved, more or less recently, towards the complexity of counting and enumeration problems and several complexity classes, which we review in this paper, have emerged in the literature. This kind of problems makes sense, notably, in the case of multicriteria optimisation where the aim is often to enumerate the set of the so-called Pareto optima. In the second part of this paper we review the complexity of multicriteria scheduling problems in the light of the previous complexity results.Received: November 2004 / Received version: March 2005MSC classification:
90B40, 90C29, 68Q15 相似文献