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A. Heusler M. Endriss C. Fred Moore E. Grosse P. v. Brentano 《Zeitschrift für Physik A Hadrons and Nuclei》1969,227(1):55-64
Prominent resonances in the reaction207Pb(p, p′)207Pb leading to the low-lying states in207Pb(1/2? g.s., 5/2? 0.57 MeV, 3/2? 0.89 MeV, 7/2? 2.33 MeV) are observed betweenE p =16 and 18 MeV. The structures in the excitation functions are interpreted as being due to analogues of states in208Pb which are mixtures of neutron particle-hole configurations. 相似文献
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Joel Uckelman Yann Chevaleyre Ulle Endriss Jérôme Lang 《Mathematical Logic Quarterly》2009,55(4):341-361
We analyze the expressivity, succinctness, and complexity of a family of languages based on weighted propositional formulas for the representation of utility functions. The central idea underlying this form of preference modeling is to associate numerical weights with goals specified in terms of propositional formulas, and to compute the utility value of an alternative as the sum of the weights of the goals it satisfies. We define a large number of representation languages based on this idea, each characterized by a set of restrictions on the syntax of formulas and the range of weights. Our aims are threefold. First, for each language we try to identify the class of utility functions it can express. Second, when different languages can express the same class of utility functions, one may allow for a more succinct representation than another. Therefore, we analyze the relative succinctness of languages. Third, for each language we study the computational complexity of the problem of finding the most preferred alternative given a utility function expressed in that language (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) 相似文献
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