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Simple test of our semi-supervised algorithm (SSLDEC) using a two-half-moons distribution. (a) Data distribution: 8 labeled points (orange points, 4 of each label) were used as labeled training data and the rest (blue points) were considered unlabeled data; (b) decision boundary after supervised training with labeled data; (c) decision boundary after SSLDEC. The accuracy score after SSLDEC reached 99.8%.
