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PCR/PLSR optimization based on noise covariance estimation and Kalman filtering theory
(Journal article; Peer reviewed, 2002)The theoretical connection between principal component regression (PCR) and partial least squares regression (PLSR) on one hand and Kalman filtering (KF) on the other is known from earlier work. In the present paper we ... 
Compression into twocomponent PLS factorizations
(Journal article; Peer reviewed, 2003)Partial least squares regression (PLSR) often requires more than two components also in the case of a scalar response variable. As shown in papers on orthogonal signal correction (OSC), it is possible to reduce the number ... 
Recruiting engineering students from vocational school
(Conference object, 2003)By the consent of the Norwegian Ministry of Education and Research, Telemark University College (TUe), Porsgrunn, Norway, this fall semester started a pilot class in electrical engineering recruiting solely from vocational ... 
Constrained numerical optimization of PCR/PLSR predictors
(Journal article; Peer reviewed, 2003)Assuming a fully known latent variables (LV) model, the optimal multivariate calibration predictor is found from Kalman filtering theory. From this follows the best possible column space for a loading weight matrix Wopt. ... 
Informative PLS scoreloading plots for process understanding
(Journal article; Peer reviewed, 2004)Principal component regression (PCR) based on principal component analysis (PCA) and partial least squares regression (PLSR) are well known projection methods for analysis of multivariate data. They result in scores and ... 
Vocational school interdisciplinary as a key to success
(Conference object, 2004)Since 1977 the Law of Secondary Training has governed Norwegian secondary schools, regardless if they were offering theoretical or practical training. Through this quarter of a century, the practical training offered by ... 
Recruiting competence from vocational schools : paradise regained?
(Conference object, 2004)After a period of declining student enrolment, in 2002 Telemark University College (TUC) took advantage of vocational schools reforms to establish a three years bachelor programme in electrical engineering for a pilot ... 
PLS postprocessing by similarity transformation: a simple alternative to OPLS
(Journal article; Peer reviewed, 2005)Several methods for orthogonal signal correction (OSC) based on preprocessing of the modeling data have been developed in recent years, and OPLS (orthogonal projections to latent structures) is a well known algorithm. ... 
Reduced PCR/PLSR models by subspace projections
(Journal article; Peer reviewed, 2006)Latent variables models used in principal component regression (PCR) or partial least squares regression (PLSR) often use a high number of components, and this makes interpretation of score and loading plots difficult. ... 
Educating future technical leaders
(Journal article, 2007) 
Modified Smithpredictor multirate control utilizing secondary process measurements
(Journal article; Peer reviewed, 2007)The Smithpredictor is a wellknown control structure for industrial time delay systems, where the basic idea is to estimate the nondelayed process output by use of a process model, and to use this estimate in an inner ... 
Finding Yrelevant part of X by use of PCR and PLSR model reduction methods
(Journal article; Peer reviewed, 2007)The paper is considering the following question: using principal component regression (PCR) or partial least squares regression (PLSR), how much data can be removed from X while retaining the original ability to predict ... 
The vanishing hero engineer
(Journal article, 2007) 
Industry/college cooperation on undergraduate project work as a college revenue source
(Conference object, 2007)Since 1994, the Norwegian Ministry for Education and Research has required government supported universities and colleges to find additional sources of income. For Telemark University College (TUC) in Porsgrunn, senior ... 
Informative scoreloadingcontribution plots for multiresponse process monitoring
(Journal article; Peer reviewed, 2009)The projection based multivariate data methods of principal component regression (PCR) and partial least squares regression (PLSR) are well established in the eld of process monitoring. Use of score and loading plots for ... 
Reinterpretation of NIPALS results solves PLSR inconsistency problem
(Journal article; Peer reviewed, 2009)The wellknown nonlinear iterative partial least squares (NIPALS) algorithm is commonly used for computation of components in partial least squares regression (PLSR) with orthogonalized score vectors. Based on generalized ... 
Empirical Modeling of Heating Element Power for the Czochralski Crystallization Process
(Journal article, 2010)The Czochralski (CZ) crystallization process is used to produce monocrystalline silicon. Monocrystalline silicon is used in solar cell wafers and in computers and electronics. The CZ process is a batch process, where ... 
On Tuning PI Controllers for Integrating Plus Time Delay Systems
(Journal article, 2010)Some analytical results concerning PI controller tuning based on integrator plus time delay models are worked out and presented. A method for obtaining PI controller parameters, Kp = k , and, Ti = , which ensures a ... 
Comparing PI Tuning Methods in a Real Benchmark Temperature Control System
(Journal article, 2010)This paper demonstrates a number of PI controller tuning methods being used to tune a temperature controller for a real air heater. Indices expressing setpoint tracking and disturbance compensation and stability margin ... 
Control of a BuoyancyBased Pilot Underwater Lifting Body
(Journal article, 2010)This paper is about position control of a speci c smallscale pilot underwater lifting body where the lifting force stems from buoyancy adjusted with an air pocket in the lifting body. A mathematical model is developed to ...