10,153 research outputs found
Canonical interpretation of and in the family
Inspired by the new resonance , we calculate the masses and
two-body OZI-allowed strong decays of the higher vector bottomonium sates
within both screened and linear potential models. We discuss the possibilities
of and as mixed states via the mixing. Our
results suggest that and might be explained as
mixed states between - and -wave vector states. The
and resonances may correspond to the mixed states
dominated by the - and -wave components, respectively. The mass and the
strong decay behaviors of the resonance are consistent with
the assignment of the state in the potential models.Comment: 9 pages, 4 figures. More discussions are adde
Nonadiabatic molecular dynamics simulation: An approach based on quantum measurement picture
Mixed-quantum-classical molecular dynamics simulation implies an effective
measurement on the electronic states owing to continuously tracking the atomic
forces.Based on this insight, we propose a quantum trajectory mean-field
approach for nonadiabatic molecular dynamics simulations. The new protocol
provides a natural interface between the separate quantum and classical
treatments, without invoking artificial surface hopping algorithm. Moreover, it
also bridges two widely adopted nonadiabatic dynamics methods, the Ehrenfest
mean-field theory and the trajectory surface-hopping method. Excellent
agreement with the exact results is illustrated with representative model
systems, including the challenging ones for traditional methods
A Data Preprocessing Algorithm for Classification Model Based On Rough Sets
AbstractAimed to solve the limitation of abundant data to constructing classification modeling in data mining, the paper proposed a novel effective preprocessing algorithm based on rough sets. Firstly, we construct the relation Information System using original data sets. Secondly, make use of attribute reduction theory of Rough sets to produce the Core of Information System. Core is the most important and necessary information which cannot reduce in original Information System. So it can get a same effect as original data sets to data analysis, and can construct classification modeling using it. Thirdly, construct indiscernibility matrix using reduced Information System, and finally, get the classification of original data sets. Compared to existing techniques, the developed algorithm enjoy following advantages: (1) avoiding the abundant data in follow-up data processing, and (2) avoiding large amount of computation in whole data mining process. (3) The results become more effective because of introducing the attributes reducing theory of Rough Sets
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