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Use of the Partial Least Squares Method with Acoustic Vibration Spectra as a New Grading Technique for Structural Timber

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Published/Copyright: June 1, 2005
Holzforschung
From the journal Volume 57 Issue 6

Summary

This study develops a high performance grading process based on the analysis of acoustic vibrations in the audible frequency range. The unique feature of the method is that the spectrum is directly applied to obtain predictive variables for estimating the modulus of elasticity and modulus of rupture. A partial least squares regression was used. This powerful method represents a compromise between principal component regression and multi-linear regression. Partial least squares regression screens for factors which account for the variance in the predictor variables and achieves the best correlation between factors and predicted variable. The method is based on projections, similar to principle components regression, whereby a set of correlated variables is compressed into a smaller set of uncorrelated factors.

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Published Online: 2005-06-01
Published in Print: 2003-10-30

Copyright © 2003 by Walter de Gruyter GmbH & Co. KG

Articles in the same Issue

  1. Contents
  2. Subject Index
  3. Species Index
  4. Author Index
  5. Diurnal Differences in the Innermost Surface of the S2 Layer in Differentiating Tracheids of Cryptomeria japonica Corresponding to a Light-Dark Cycle
  6. The Isolation of Specific Bio-Control Agents for the Dry Rot Fungus Serpula Lacrymans
  7. TEM Examination of Surface Characteristics of Rubberwood (Hevea brasiliensis) HTMP Fibers
  8. Termiticidal Performance of Wood-Based Composites Treated with Silafluofen Using Supercritical Carbon Dioxide
  9. Use of Animal Proteins to Limit Leaching of Active Copper Ions Preservatives from Treated Wood
  10. Speciation of Cr and As Leachates from CCA Treated Wood by Differential Pulse Polarography
  11. Delignification Mechanism during High-Boiling Solvent Pulping Part 3. Structural Changes in Lignin Analyzed by 13C-NMR Spectroscopy
  12. Topochemical Investigations on Delignification of Picea abies [L.] Karst. during Alkaline Sulfite (ASA) and Bisulfite Pulping by Scanning UV Microspectrophotometry
  13. Delignification of Bamboo (Bambusa procera acher) Part 2. Characterisation of Kraft Black Liquors from Different Cooking Conditions
  14. The Effect of Magnesium Ions and Chelants on Peroxide Bleaching
  15. Moisture Content of Green Wood in High Temperature Water Vapor
  16. Wood Fracture Pattern during the Water Adsorption Process
  17. Use of the Partial Least Squares Method with Acoustic Vibration Spectra as a New Grading Technique for Structural Timber
  18. Mode I Fracture Behaviour on the Growth Ring Scale and Cellular Level of Spruce (Picea abies [L.] Karst.) and Beech (Fagus sylvatica L.) Loaded in the TR Crack Propagation System
  19. Microtensile Testing of Wood Fibers Combined with Video Extensometry for Efficient Strain Detection
  20. Mapping Radial,Tangential and Longitudinal Shrinkages and Relation to Tension Wood in Discs of the Tropical Tree Symphonia globulifera
  21. Assessment of Wood-Cement Compatibility: A New Approach
https://doi.org/10.1515/HF.2003.097

Articles in the same Issue

  1. Contents
  2. Subject Index
  3. Species Index
  4. Author Index
  5. Diurnal Differences in the Innermost Surface of the S2 Layer in Differentiating Tracheids of Cryptomeria japonica Corresponding to a Light-Dark Cycle
  6. The Isolation of Specific Bio-Control Agents for the Dry Rot Fungus Serpula Lacrymans
  7. TEM Examination of Surface Characteristics of Rubberwood (Hevea brasiliensis) HTMP Fibers
  8. Termiticidal Performance of Wood-Based Composites Treated with Silafluofen Using Supercritical Carbon Dioxide
  9. Use of Animal Proteins to Limit Leaching of Active Copper Ions Preservatives from Treated Wood
  10. Speciation of Cr and As Leachates from CCA Treated Wood by Differential Pulse Polarography
  11. Delignification Mechanism during High-Boiling Solvent Pulping Part 3. Structural Changes in Lignin Analyzed by 13C-NMR Spectroscopy
  12. Topochemical Investigations on Delignification of Picea abies [L.] Karst. during Alkaline Sulfite (ASA) and Bisulfite Pulping by Scanning UV Microspectrophotometry
  13. Delignification of Bamboo (Bambusa procera acher) Part 2. Characterisation of Kraft Black Liquors from Different Cooking Conditions
  14. The Effect of Magnesium Ions and Chelants on Peroxide Bleaching
  15. Moisture Content of Green Wood in High Temperature Water Vapor
  16. Wood Fracture Pattern during the Water Adsorption Process
  17. Use of the Partial Least Squares Method with Acoustic Vibration Spectra as a New Grading Technique for Structural Timber
  18. Mode I Fracture Behaviour on the Growth Ring Scale and Cellular Level of Spruce (Picea abies [L.] Karst.) and Beech (Fagus sylvatica L.) Loaded in the TR Crack Propagation System
  19. Microtensile Testing of Wood Fibers Combined with Video Extensometry for Efficient Strain Detection
  20. Mapping Radial,Tangential and Longitudinal Shrinkages and Relation to Tension Wood in Discs of the Tropical Tree Symphonia globulifera
  21. Assessment of Wood-Cement Compatibility: A New Approach
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