共查询到20条相似文献,搜索用时 15 毫秒
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Qi Wang Jun Lu Hushan Xu Songlin Li Yongtai Zhu Yuhu Zhang Wendong Tian Zhichang Li 《中国科学A辑(英文版)》1997,40(4):412-416
Excitation functions of the projectile-like fragments in the dissipative reaction19F+51V have been measured at θ1 = 21.7°, 36.1° and 40.5°. The incident energies are from 102.25 to 109.50 MeV in 250 keV steps. The energy coherence width г and the rotation angular velocities ω of the corresponding dinuclear systems are extracted. The coherence rotation and its importance in the reaction process are discussed. 相似文献
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Pierre Bérard 《manuscripta mathematica》1990,69(1):255-259
In this note we give a sufficient condition for Δ+V to be positive on a closed Riemannian manifold. We also give an application to a Bochner type vanishing theorem.
This research was partially done under the E.E.C. Contract # SC 1-0105-C “GADGET” at the C.N.R.S. U.R.A. 188 相似文献
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在连通图G中,如果对任意的V∈V(G),G-v有完美匹配,则称G是因子临界图.该文刻画了具有|V(G)| +2个最大匹配的因子临界图.进而,刻画了一些特殊的双因子临界图. 相似文献
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Hiroki Shimakura 《Mathematische Zeitschrift》2006,252(4):849-862
In this article, we give a method of calculating the automorphism groups of the vertex operator algebras V+L associated with even lattices L. For example, by using this method we determine the automorphism groups of V+L for even lattices of rank one, two and three, and even unimodular lattices.
The author was supported by the Japan Society for the Promotion of Science Research Fellowships for Young Scientists and COE
grant of Hokkaido University. 相似文献
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A new characterization of spaces having a point-countable basis is obtained. This characterization is used in giving a simpler
proof of a recent theorem of Filippov.
Partly supported by an N.S.F. grant. 相似文献
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For the number of integer solutions of the title equation, withW≤;x (x a large parameter), an asymptotics of the form Ax log x + Bx + O(x
1/2 (log x)3 (loglog x)2) is established. This is achieved in a general setting which furnishes applications to some other natural arithmetic functions.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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Matthias Leclerc 《Archiv der Mathematik》1986,46(2):159-161
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N. A. Shirokov 《Journal of Mathematical Sciences》1988,42(2):1665-1667
One proves that an approximation estimate, given by V. V. Andrievskii, cannot be improved in a special domain.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 149, pp. 177–180, 1986. 相似文献
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Oxidation of light and heavy water by peroxy disulphate was studied at 60–70° C. The acid independent and acid dependent rate constants and respective ΔE values were computed. An attempt is made to explain the kinetic isotopic effect observed. A probable mechanism is proposed. 相似文献
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