Publications

All CQ consultants (co-) authored several papers on Chemometrics / Applied Statistics., and co-autored leading textbooks.

  • 'Using the correct intervals for prediction: a tutorial on tolerance intervals for ordinary least-squares regression', S. De Gryze, I. Langhans, M. Vandebroek, Chem. Intell. Lab. Systems, 87, 147-154, 2007
  • "Identifying effects under a split-plot design structure", Ivan Langhans, Peter Goos, Martina Vandebroek, J. Chemometrics 2005; 19; 5-15
  • "Practical inference from industrial split-plot designs", Peter Goos, Ivan Langhans, Martina Vandebroek, Accepted for publication by Journal of Quality Technology
  • ‘In situ UV-Vis diffuse reflectance spectroscopy - on line activity measurements of supported chromium oxide catalysts: relating isobutane dehydrogenation activity with Cr-speciation via experimental design’ , Bert M. Weckhuysen, An A. Verberckmoes, Jan Debaere, Kristine Ooms, Ivan Langhans, Robert A. Schoonheydt, The Journal of Molecular Catalysis: A. Chemical 151 (2000) 115
  • "Designs for response surface modelling", I. Langhans in "Design and Analysis in Chemical Research", 1999, ed. Tranter, Sheffield Academic Press Ltd
  • ‘Nondestructive measurement of acidity soluble solids and firmness of Jonagold apples using NIR-spectroscopy’ , Lammertyn J, Nicolai B, Ooms K, et al., [J]. Trans. of the ASAE, 1998, 41(4):1089-1094
  • "Effect of glucose on production and release of proinsulin conversion products by cultured human islets", Y. Zambre, Z. Ling, X. Hou, A; Foriers, B. Van den Bogaert, C. van Schravendijk and D. Pipeleers, J. of Clinical Endocrinology and Metabolism, 83, 1234-1238 (1998)
  • "Chemometric Analysis of Diffuse Reflectance Spectra of Co2+-exchanged Zeolites: Spectroscopic Fingerprinting of Coordination Environments", Verberckmoes A.A., Weckhuysen B.M., Schoonheydt R.A., Ooms K., Langhans I., Analytica Chimica Acta, 348, 267-272, 1997
  • "Prediction error based model selection and evaluation of PLS regression models for calibration based on many X-variables" CQ Research report 1, I. Langhans, 1996
  • "Identification of potentially causal regressors in PLS models", CQ Research report 2, K. Ooms, 1996
  • "Finding frequencies in signals: the Fourier transform", B. van den Bogaert, Chapters 1 & 2
  • "When frequencies change in time; towards the wavelet transform", B. van den Bogaert, in Wavelets in Chemisty, Beata Walczak (Ed.)
  • "Application of wavelet packet transform in pattern recognition of NIR data", B. Walczak, B. van den Bogaert & D.L. Massart. . Anal. Chem., 68, 1742-1747 (1996).
  • "Orthogonal projection approach applied to peak purity assessment",F. Cuesta Sanchez, J. Toft, B. van den Bogaert & D.L. Massart. . Anal. Chem., 68, 79-85 (1996).
  • "Resolution of overlapping mid-infrared spectra using simplisma and a 2nd order derivative approach", J. Toft, F. Cuesta Sánchez, B. van den Bogaert, F.O. Libnau, & D.L. Massart. . Vibrational Spectroscopy, 10, 125-138 (1996).
  • "Tutorial : multivariate peak purity approaches", F. Cuesta Sánchez, B. van den Bogaert, S.C. Rutan & D.L. Massart.. Chem. Intell. Lab. Systems, 34, 139-171 (1996).
  • "Application of the needle algorithm for exploratory analysis and resolution of HPLC-DAD data", A. de Juan, B. van den Bogaert, F. Cuesta Sánchez, and D.L. Massart. . Chem. Intell. Lab. Syst., 33, 133-145 (1996).
  • "Dynamic Link Libraries. I. Introduction", Pieter Vankeerbergen, Bas van den Bogaert and D.L. Massart, Trends in Analytical Chemistry, 15, 436-438 (1996)
  • Dynamic Link Libraries. II. Development, Pieter Vankeerbergen, Bas van den Bogaert and D.L. Massart, Trends in Analytical Chemistry, 15, 439-444 (1996)
  • "Monitoring powder blending by NIR spectroscopy", F. Cuesta Sanchez, J. Toft, B. Van den Bogaert, D.L. Massart, S.S. Dive & P. Hailey.. Fresenius J. Anal. Chem., 352, 771-778 (1995).
  • "Branching ratio of the C2H2 + O reaction at 290 K from kinetic modelling of relative methylene concentration-versus-time profiles in C2H2/O/H systems", J. Peeters, W. Boullart, I. Langhans, Int. J. Chem. Kinet., 26, 869-886, 1994
  • " Formation of CH(a4Σ- and/or X2Π) in the reaction of Ketenyl radicals with Oxygen atoms. Determination of the Methylidine yield at 290 K and Ab Initio Calculations", J. Peeters; I. Langhans; W. Boullart; M.T. Nguyen; K. Devriendt, J. Phys. Chem., 98, 11988-11996, 1994
  • "Quantification of chromatographic data using a matched filter; evaluation and correction of signal model errors", B. van den Bogaert, H.F.M. Boelens and H.C. Smit, , Anal Chim Acta 274, 71, (1993)
  • "Quantification of chromatographic data using a matched filter; robustness towards noise model errors", B. van den Bogaert, H.F.M. Boelens and H.C. Smit, , Anal Chim Acta 274, 87, (1993)
  • B. van den Bogaert, H.F.M. Boelens and H.C. Smit, Chemom. Intell Lab Syst, ???
  • "Expert system for the determination of the analytical strategy in a laboratory for elemental analysis; Project definition", B. van den Bogaert, J.B.W. Morsink and H.C. Smit, , Anal Chim Acta 270, 107, (1992)
  • "Expert system for the determination of the analytical strategy in a laboratory for elemental analysis; Development of an X-Ray fluorescence subsystem", B. van den Bogaert, J.B.W. Morsink and H.C. Smit, , Anal Chim Acta 270, 115, (1992)
  • "Rate Constants of the Reactions of CF3O2, i-C3H7O2 and t-C4H9O2 with NO" J. Peeters, J. Vertommen, I Langhans, Ber. Bunsenges. Phys. Chem., 96, 431-436, 1992