Abstract. This paper deals with new descriptive statistics for histogram data, in the framework of symbolic data analysis. A main contribution consists in defining the main order statistics (median and quartiles) of a histogram variable using the quantile functions associated with the corresponding empirical distribution functions of the observed histograms. The definition of an order relations...

Abstract This paper aims to explore the simulation method of random spatial distribution natural fragments. The transformation between three-dimensional coordinates and two-dimensional planar fragments is realized by coordinate mapping inverse mapping, uniform in plane Monte Carlo stochastic points method, so as obtain position

In this study, we compared age-related lip movement variability with acoustic variability across repetitions using Functional Data Analysis (FDA). Lip movement and acoustic data of 1520 repetitions of a short Swedish phrase from 50 Swedish speakers were collected. Results showed weak to moderate negative correlations for age and variability in lip movements, phrase duration and sound pressure l...

A progressive spatial query retrieves spatial data based on previous queries (e.g., to fetch data in a more restricted area with higher resolution). A direct query, on the other side, is defined as an isolated window query. A multi-resolution spatial database system should support both progressive queries and traditional direct queries. It is conceptually challenging to support both types of qu...