The Effect of Oversampling and Undersampling on Classifying Imbalanced Text Datasets

PCT No. PCT/GB85/00507 Sec. 371 Date Aug. 7, 1986 Sec. 102(e) Date Aug. 7, 1986 PCT Filed Nov. 7, 1985 PCT Pub. No. WO86/02933 PCT Pub. Date May 22, 1986.A polyurethane reaction product of a di- or polyisocyanate and a diol or polyol having at least two hydroxyl groups capable of reacting with an isocyanate group and having the residue of at least one further hydroxyl group present in the form of a phosphorus acid ester group of formula (I), wherein n is 0 or 1, m is 2, 3, or 4 and each R independently is an alkyl group of 1 to 4 carbons optionally with a diol or polyol which does not contain a group of formula I is useful in biocompatible, particularly haemocompatible devices for use in methods of medical treatment.

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