A recent study on the condition numbers of mixed least squares-total squares (MTLS) problem is due to Zheng and Yang (Numer Linear Algebra Appl. 2019;26(4):e2239). However, associated expressions are not compact Kronecker-product operations make computation costly. In this paper, we first present new alternative closed formula for order perturbation estimate MTLS solution. Then reveal relations...

Proceedings @ IJITCS ( ISSN : 2091-1610 ) http://www.iisrc.org/ijitcs/about_ijitcs.php , OLS ( ISSN : 2091-0266 ) ( http://www.openlearningsociety.com) , IMACST ( ISSN 1857-7202) http://www.imacst.com/ The Role of Virtual Learning Environment in Improving Information and Communcation Tecnology Adoption in Teaching Exploring How Virtual Learning Environments Improve University Teacher’s Attitude...

Partial least squares (PLS) is sometimes used as an alternative to covariance-based structural equation modeling (SEM). This paper briefly reviews currently available SEM techniques, and provides a critique of the perceived advantages of PLS over covariance-based SEM as commonly cited by PLS users. Specific attention is drawn to the primary disadvantage of PLS, namely the lack of consistency of...

In robust regression theory the estimators, which can “resist” contamination of nearly fifty percent of the data, due to the fact that they are highly important in practice, were intensively studied. In this paper we describe three methods with high breakdown point: the least trimmed squares (LTS), the least median of squares (LMS) and their generalization the least weighted squares (LWS) estim...