## Abstract Twentyβfive descriptors and 61 structurally different analytes have been used on a partial least squares (PLS) to latent structure technique in order to study chromatographically their interaction mechanism on a phenyl column. According to the model, 240 different retention times of the
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On the difference between gauss-markov and least squares estimates
β Scribed by P. Scobey; D. G. Kabe
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- English
- Weight
- 254 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0323-3847
No coin nor oath required. For personal study only.
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This paper investigates the efficiencies of several generalized least squares estimators (GLSEs) in terms of the covariance matrix. Two models are analyzed: a seemingly unrelated regression model and a heteroscedastic model. In both models, we define a class of unbiased GLSEs and show that their cov