Class imbalance has been reported as an important obstacle to apply traditional learning algorithms to real-world domains. Recent investigations have questioned whether the imbalance is the unique factor that hinders the performance of classifiers. In this paper, we study the behavior of six algorithms when classifying imbalanced, overlapped data sets under uncommon situations (e.g., when the o...

We represent music as sets of points or sets of horizontal line segments in the Euclidean plane. Via this geometric representation we cast transposition invariant content-based music retrieval problems as ones of matching sets of points or sets of horizontal line segments in plane under translations. For finding the exact occurrences of a point set (the query pattern) of size within another poi...

One of the main approaches to extract multi-word units is the frequency threshold approach, but the way this approach considers dispersion data still leaves a lot to be desired. This study adopts Gries’s (2008) dispersion measure to extract trigrams from a Chinese corpus, and the results are compared with those of the frequency threshold approach. It is found that the overlap between the two ap...

The dual mirror technique has been proposed as a method to reduce the cost of achieving a small pixel size for a prescribed S/N sensitivity. As a byproduct, the trigger sensitivity is enhanced. This is an important consideration as moonlight threatens to reduce the detector's trigger aperture. The uorescence detector shower resolution depends critically on good angular resolution as well as the...

We present a novel method to characterize the e phase space at the IP of the SLAC B-factory, that combines single-beam measurements with a detailed mapping of luminous-region observables. Transverse spot sizes are determined in the two rings with synchrotron-light monitors and extrapolated to the IP using measured lattice functions. The specific luminosity, which is proportional to the inverse ...

A controllable energy method, which considers the undersampling issue of transfer function and valid spectral a source signal, is proposed to implement angular spectrum diffraction calculation in near far fields. The method provides an optimized frequency boundary fCE within it always keeps be diffracted. significantly reduces number samples while having same accuracy as previous methods, imply...

Analytic results for twoand three-centre integrals are derived for the truncated spherical-wave basis set designed for first-principles pseudopotential calculations within density-functional theory. These allow the overlap, kinetic energy and non-local pseudopotential matrix elements to be calculated efficiently and accurately. In particular, the scaling of the computational effort with maximum...