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With the implementation of some large sky surveys such as LAMOST, We will collect massive spectra data. The automated spectral classification becomes more and more important. In this paper, a local mean based k-nearest neighbor (LMKNN) method is used for the automated classification of galaxies and QSOs (quasars). The main idea of LMKNN is that it selects k nearest neighbors from each class of training...
Numerical relativistic simulations of a supernova core collapse indicate that a gravitational waveform from the supernova core collapse has several types. The gravitational waveform is strongly related to the stellar structure such as a rotation of the supernova core and an equation of state. Knowing the distribution of the types of the gravitational waveforms is an probe to elucidate the story of...
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