Meta-Semi state-of-the-art semi-supervised learning algorithm (IMAGE) Tsinghua University Press Caption Meta-Semi, shown in figure 1, trains deep networks using pseudo-labeled samples whose gradient directions are similar to labeled samples. Algorithm 1 shows the Meta Semi pseudo code. The Meta-Semi algorithm outperforms state-of-the-art semi-supervised learning algorithms. Credit CAAI Artificial Intelligence Research, Tsinghua University Press Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.