296 research outputs found
The use of orthogonal signal correction to improve NIR readings of pulp fibre properties
No full textIn 1999 Tembec Industries and the National Renewal Energy Laboratories worked together in developing a methodology to use Near-infrared (NIR). Technology of in-house pulp fibre quality properties Q99 and Q97. The initial results with dry samples of pulp were encouraging. the wet samples results were initially disappointing using the standard chemometric techniques. Svante Wold developed a new chemometric method called Orthogonal Signal correction (OSC), which was used to obtain a good correction of Q99 in the wet pulp samples.</p
The World Loanword Database (WOLD) 2009
No full text<p>Haspelmath, Martin & Tadmor, Uri (eds.) 2009. World Loanword Database. Leipzig: Max Planck Institute for Evolutionary Anthropology. (Available online at http://wold.clld.org)</p>This deposit contains both, the data of WOLD as well as the software serving http://wold.clld.org. Robert Forkel is author of the latter
The prediction theory of stationary random fields. III. Fourfold Wold decompositions
No full textAbstractIn this paper, we investigate various fourfold Wold-type decompositions of stationary random fields under different hypotheses of commutation properties. Spectral characterizations of the three multiplicities of the innovation subspaces are obtained. The equivalence relations between the weak commutation property, fourfold Wold-type decomposition, and quarter-plane moving average representation are proved. A complete spectral characterization of the weak commutation property is also given
Orthogonal projections to latent structures (O-PLS)
No full textA generic preprocessing method for multivariate data, called orthogonal projections to latent structures (O-PLS), is described. O-PLS removes variation from X (descriptor variables) that is not correlated to Y (property variables, e.g. yield, cost or toxicity). In mathematical terms this is equivalent to removing systematic variation in X that is orthogonal to Y. In an earlier paper, Wold et al. (Chemometrics Intell. Lab. Syst. 1998; 44: 175-185) described orthogonal signal correction (OSC). In this paper a method with the same objective but with different means is described. The proposed O-PLS method analyzes the variation explained in each PLS component. The non-correlated systematic variation in X is removed, making interpretation of the resulting PLS model easier and with the additional benefit that the non-correlated variation itself can be analyzed further. As an example, near-infrared (NIR) reflectance spectra of wood chips were analyzed. Applying O-PLS resulted in reduced model complexity with preserved prediction ability, effective removal of non-correlated variation in X and, not least, improved interpretational ability of both correlated and non-correlated variation in the NIR spectra.</p
A Tribute to the Memory of Svante Arrhenius (1859-1927) [Elektronisk resurs] : a Scientist Ahead of His Time
No full textPit-digging, occupation and structured deposition on Rudston Wold Eastern Yorkshire
No full textExcavated Neolithic pit clusters, like those found on Rudston Wold in eastern Yorkshire, have often been seen as the remains of occupation sites. The features are interpreted as possessing practical roles, including their use for storing grain, and the incorporated material culture regarded as casually discarded waste. More recent interpretations, however, have emphasized these features\u27 functional unsuitability, rather seeing pit-digging, and the deposition of ideologically-charged objects, as a deliberate attempt to inscribe meaning across a landscape. These two different approaches are considered by a detailed examination of the Peterborough Ware and Grooved Ware associated pits, dug-out swallow-holes and hollows of Rudston Wold. It is argued that their lithic assemblage demonstrates a conventionality best understood as representing occupation at and around the features, themselves once part of small-scale dwellings, but that this material nonetheless resulted from deliberate and purposeful acts which changed during the later Neolithic. \ua9 2006 The Author; Journal compilation \ua9 2006 Blackwell Publishing Ltd
The delimitation of Giffenity for the Wold-Juréen (1953) utility function using relative prices: A note
No full textIn the study of Giffen behavior or "Giffenity", there remains a paradox. On one hand, the Wold-Juréen (Demand analysis: A study in Econometrics, 1953) utility function has been touted as the progenitor of a multi-decade search for those two-good, particular utility functions, which exhibit Giffenity. On the other hand, there is no evidence that the Wold- Juréen (1953) utility function has ever been fully evaluated for Giffenity, with perhaps one minor exception, Weber (The case of a Giffen good: Comment, 1997). But there, Weber (1997) showed that the Giffenity of Good 1 depends upon the relative magnitude of income vis-à-vis the price of Good 2. Weber's precondition is so vague that it lacks broad appeal. This paper offers a new and a clear cut precondition for Giffen behavior under the Wold-Juréen (1953) utility function. That is, the author shows that if the price of Good 1 is greater than or equal to the price of Good 2, then Good 1 is a Giffen good
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