Mao-Zedong At SemEval-2023 Task 4: Label Represention Multi-Head
  Attention Model With Contrastive Learning-Enhanced Nearest Neighbor Mechanism
  For Multi-Label Text Classification
Che Zhang Ping'an Liu Zhenyang Xiao Haojun Fei
The study of human values is essential in both practical and theoretical
domains. With the development of computational linguistics, the creation of
large-scale datasets has made it possible to automatically recognize human
values accurately. SemEval 2023 Task 4\cite{kiesel:2023} provides a set of
arguments and 20 types of human values that are implicitly expressed in each
argument. In this paper, we present our team's solution. We use the
Roberta\cite{liu_roberta_2019} model to obtain the word vector encoding of the
document and propose a multi-head attention mechanism to establish connections
between specific labels and semantic components. Furthermore, we use a
contrastive learning-enhanced K-nearest neighbor
mechanism\cite{su_contrastive_2022} to leverage existing instance information
for prediction. Our approach achieved an F1 score of 0.533 on the test set and
ranked fourth on the leaderboard.