Now showing items 21-40 of 129

    • PCR/PLSR optimization based on noise covariance estimation and Kalman filtering theory 

      Ergon, Rolf; Esbensen, Kim H. (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 two-component PLS factorizations 

      Ergon, Rolf (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 

      Clausen, Trond; Hagen, Svein Thore; Hasleberg, Harald; Aarnes, Jens Harald (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 

      Ergon, Rolf (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 score-loading plots for process understanding 

      Ergon, Rolf (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 

      Clausen, Trond (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? 

      Clausen, Trond; Hagen, Svein Thore; Hasleberg, Harald (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 post-processing by similarity transformation: a simple alternative to OPLS 

      Ergon, Rolf (Journal article; Peer reviewed, 2005)
      Several methods for orthogonal signal correction (OSC) based on pre-processing 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 

      Ergon, Rolf (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 

      Clausen, Trond (Journal article, 2007)
    • Modified Smith-predictor multirate control utilizing secondary process measurements 

      Ergon, Rolf (Journal article; Peer reviewed, 2007)
      The Smith-predictor is a well-known control structure for industrial time delay systems, where the basic idea is to estimate the non-delayed process output by use of a process model, and to use this estimate in an inner ...
    • Finding Y-relevant part of X by use of PCR and PLSR model reduction methods 

      Ergon, Rolf (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 

      Clausen, Trond (Journal article, 2007)
    • Industry/college cooperation on undergraduate project work as a college revenue source 

      Clausen, Trond; Holta, Randi Toreskås (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 score-loading-contribution plots for multi-response process monitoring 

      Ergon, Rolf (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 ...
    • Re-interpretation of NIPALS results solves PLSR inconsistency problem 

      Ergon, Rolf (Journal article; Peer reviewed, 2009)
      The well-known 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 

      Komperød, Magnus; Lie, Bernt (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 

      Di Ruscio, David (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 

      Haugen, Finn (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 Buoyancy-Based Pilot Underwater Lifting Body 

      Haugen, Finn (Journal article, 2010)
      This paper is about position control of a speci c small-scale 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 ...