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Showing papers on "Centroid published in 1968"


Patent
06 Feb 1968

44 citations


Journal ArticleDOI
TL;DR: In this article, the authors proposed a method to reduce transient matrix heat transfer test data in the low Ntu-range (0·5 < Ntu < 5·0).

20 citations





Journal ArticleDOI
TL;DR: The oblique powered vector factor analysis utilizes a preliminary direct orthogonal solution to identify clusters, passes primary axes through the cluster centroids and produces final oblique reference structure by simple trans- formation.
Abstract: Good simple structure is the natural consequence of fitting hyperplanes to cluster centroids in analyses of data in which distinct cluster configuration exists. The oblique powered vector factor analysis utilizes a preliminary direct orthogonal solution to identify clusters, passes primary axes through the cluster centroids and produces final oblique reference structure by simple trans- formation. The hyperplane for each oblique factor is fitted precisely to the centroids for clusters of variables projecting primarily on other factors. The method is computationally efficient and has in practical applications produced meaningful results with good simple structure characteristics. An illustration of application to the 24-variable Harman problem is included.

3 citations


Journal ArticleDOI
TL;DR: In this article, a simplified method, sufficiently accurate to eliminate such iterations in most cases, is given, based on the Thomsen & Yap analysis of statistical errors in centroid, median, and peak.
Abstract: One definition employed by crystallographers in fixing the centroid of an X-ray diffraction profile has previously involved in its application the use of successive approximations. A simplified method, sufficiently accurate to eliminate such iterations in most cases, is given, based on the Thomsen & Yap analysis of statistical errors in centroid, median, and peak. Certain differences between the above error analysis and Wilson's recent work are discussed briefly.

2 citations


Journal ArticleDOI
TL;DR: In this paper, a correction of the moment method for finite range of integration has been introduced and has been applied in detail to the particular case of lifetime data analysis, in the case in which one or two mean lives occur.

1 citations