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Regression on manifolds with implications for system identification / Henrik Ohlsson.

Ohlsson, Henrik, 1981- (författare)
Linköpings universitet. Institutionen för systemteknik (utgivare)
Alternativt namn: Engelska: Linköping University. Department of Electrical Engineering
Alternativt namn: ISY
Publicerad: Linköping : Department of Electrical Engineering, Linköping University, 2008
Engelska 1 onlineresurs (xiv, 98 sidor)
Serie: Linköping studies in science and technology. Thesis, 0280-7971 ; 1382
Läs hela texten (Sammanfattning och fulltext från Linköping University Electronic Press)
  • E-bokAvhandling(Licentiatavhandling Linköping : Linköpings universitet, 2008)
Sammanfattning Ämnesord
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  • The trend today is to use many inexpensive sensors instead of a few expensive ones, since the same accuracy can generally be obtained by fusing several dependent measurements. It also follows that the robustness against failing sensors is improved. As a result, the need for high-dimensional regression techniques is increasing. As measurements are dependent, the regressors will be constrained to some manifold. There is then a representation of the regressors, of the same dimension as the manifold, containing all predictive information. Since the manifold is commonly unknown, this representation has to be estimated using data. For this, manifold learning can be utilized. Having found a representation of the manifold constrained regressors, this low-dimensional representation can be used in an ordinary regression algorithm to find a prediction of the output. This has further been developed in the Weight Determination by Manifold Regularization (WDMR) approach. In most regression problems, prior information can improve prediction results. This is also true for high-dimensional regression problems. Research to include physical prior knowledge in high-dimensional regression i.e., gray-box high-dimensional regression, has been rather limited, however. We explore the possibilities to include prior knowledge in high-dimensional manifold constrained regression by the means of regularization. The result will be called gray-box WDMR. In gray-box WDMR we have the possibility to restrict ourselves to predictions which are physically plausible. This is done by incorporating dynamical models for how the regressors evolve on the manifold. 

Ämnesord

Systemteori  (sao)
Systemidentifiering  (sao)
System identification  (LCSH)
System theory  (LCSH)

Indexterm och SAB-rubrik

System identification
High-dimensional regression
Manifold
Gray-box identification
Brb Cybernetik och informationsteori

Klassifikation

003 (DDC)
Brb (kssb/8)
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