Knowledge Reductions Based on Descriptors in Incomplete Systems;

Attributes Reduct and Decision Rule Optimization Based on Descriptors in Information Systems;

The MEDV descriptors can be calculated through a relative electronegativity and a relative distance of the substituted aromatic compounds atoms.

To establish a new amino acid structure descriptor that can be applied to polypeptide quantitative structure activity relationship (QSAR) studies, a new descriptor, SVRDF, was derived from a principal components analysis of a matrix of 150 radial distribution function index of amino acids.

In this paper,we present a novel V-system descriptor for 2D models;the descriptor is invariant against the rotation,translation,scale transform,and can remove the effect of the arbitrary start point of the shape through the principal orientation.

By the approach,we first obtain orthogonal projections of the 3D models which contain the depth information of the models,and then we get similarity among 3D models through matching the shape similarity among orthogonal projections in terms of both Zernike descriptor and Reeb graph.