Markov Models for Cross-Covariances |
| |
Authors: | A. G. Journel |
| |
Affiliation: | (1) Geological and Environmental Sciences Department, Stanford University, Stanford, California 94305-2220, USA |
| |
Abstract: | Markov models based on various data screening hypotheses are often used because they reduce the statistical inference burden. In the case of co-located cokriging, the commonly used Markov model results in the cross-covariance being proportional to the primary covariance. Such model is inappropriate in the presence of a smoothly varying secondary variable defined on a much larger volume support than the primary variable. For such cases, an alternative Markov screening hypothesis is proposed that results in a more continuous cross-covariance proportional to the secondary covariance model. A parallel development of both Markov models is presented. A companion paper provides a comparative application to a real data set. |
| |
Keywords: | cokriging screening effect coregionalization positive definiteness |
本文献已被 SpringerLink 等数据库收录! |
|