JSM 2004 Online Program

Abstract #302169

This is the preliminary program for the 2004 Joint Statistical Meetings in Toronto, Canada. Currently included in this program is the "technical" program, schedule of invited, topic contributed, regular contributed and poster sessions; Continuing Education courses (August 7-10, 2004); and Committee and Business Meetings. This on-line program will be updated frequently to reflect the most current revisions.

To View the Program:
You may choose to view all activities of the program or just parts of it at any one time. All activities are arranged by date and time.

The views expressed here are those of the individual authors
and not necessarily those of the ASA or its board, officers, or staff.

Back to main JSM 2004 Program page

Activity Number:	118
Type:	Contributed
Date/Time:	Monday, August 9, 2004 : 10:30 AM to 12:20 PM
Sponsor:	IMS
Abstract - #302169
Title:	On the Linear Combination of Spatio-temporal Covariances and Variograms
Author(s):	Chunsheng Ma*+
Companies:	Wichita State University
Address:	Dept. of Mathematics and Statistics, Wichita, KS, 67260-0033,
Keywords:	spatio-temporal ; covariance ; variogram
Abstract:	The covariance function and the variogram are commonly used to describe the space-time interaction for a process that evolves in both space and time. Although the sum of two covariance functions (or variograms) is also a covariance function (or variogram), this is not necessarily true for the difference or for a linear combination of two covariance functions (or variograms). We discuss the conditions for a linear combination of two covariance functions (or variograms) to be a valid covariance (or variogram), and propose some new spatio-temporal covariance models and variograms.

The address information is for the authors that have a + after their name.
Authors who are presenting talks have a * after their name.

Back to the full JSM 2004 program