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Multi-Level Knowledge Distillation with Positional Encoding Enhancement
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DOI：10.1016/j.patcog.2025.111458.png)
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Abstract
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In recent years, Graph Neural Networks (GNNs) have achieved substantial success in addressing graph-related tasks. Knowledge Distillation (KD) has increasingly been adopted in graph learning as a classical technique for model compression and acceleration, enabling the transfer of predictive power from trained GNN models to lightweight, easily deployable Multi-Layer Perceptron (MLP) models. However, this approach often neglects node positional features and relies solely on trained GNN-generated labels to train MLPs based on node content features. Moreover, it heavily depends on local information aggregation, making it challenging to capture global graph structure and thereby limiting performance in node classification tasks. To address this issue, we propose Multi-Level Knowledge Distillation with Positional Encoding Enhancement (MLKD-PE). Our method employs positional encoding technique to generate node positional features, which are then combined with node content features to enhance the MLP's ability to perceive node positions. Additionally, we introduce a multi-level KD technique that aligns the final output of the student model with the teacher model's output, facilitating detailed knowledge transfer by incorporating intermediate layer outputs from the teacher model. Experimental results demonstrate that our method significantly improves classification accuracy across multiple datasets compared to the baseline model, confirming its superiority in node classification tasks.
Keywords:
Graph neural networks
Multi-layer perceptrons
Graph knowledge distillation
Positional encoding
Efficient training and inference
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