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We propose a series of icosahedral matryoshka clusters of A@B12@A20 (A = Sn, Pb; B = Mg, Zn, Cd), which possess large HOMO-LUMO gaps (1.29 to 1.54 eV) and low formation energies (0.06 to 0.21 eV/atom). A global minimum search using a genetic algorithm and density functional theory calculations confirms that such onion-like three-shell structures are the(More)
The conventional antenna cover low efficiency, poor network quality, the field strength of the cover between the indoor distribution system in the different systems of different mutual interference and indoor distribution system redundant construction serious waste of resources. To solve above mentioned problems, China Unicom raised a novel sharing indoor(More)
This paper selects all the provincial libraries and the libraries of their capital cities for a total of 50 to investigate the application of Web2.0 technologies. The investigation includes RSS, Blog, Wiki, IM, Tag, Ajax, Toolbar and SNS and so on, and the paper analyzes the technologies and their application. The results show that the application of Web2.0(More)
In this paper, we prove the sharp estimates for the multilinear commutator related to the Marcinkiewicz operator. By using the sharp estimates, we obtain the boundedness of the multilinear commutator on Morrey spaces. 1. Introduction As the development of singular integral operators, their commutators have been well studied(see [1][3-5][10-12]). Let T be(More)
Speaker normalization may have a significant impact on both speaker-adaptive and speaker-independent speech recognition. In this paper, a codeword-dependent neural network (CDNN) is presented for speaker normalization. The network is used as a nonlinear mapping function to transform speech data between two speakers. The mapping function is characterized by(More)