Fine-Grained Classification of Localized Educational Resources Based on Deep Knowledge Tracing Model
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Abstract
Accurate representation and classification of sequential information are critical for intelligent engineering systems involving complex signal processing and adaptive decision-making. To address the data sparsity problem in fine-grained classification of localized educational resources, this study proposes a contrast-enhanced attentional knowledge tracing framework that combines Attentive Knowledge Tracing (AKT), sliding-window sequence augmentation, and InfoNCE-based contrastive learning. The proposed method extracts cognitive state transition vectors as latent representations of resource functions and performs hierarchical clustering to identify implicit instructional categories without relying on large-scale annotated corpora or textual features. Experimental results demonstrate that the proposed framework achieves a silhouette coefficient of 0.72 under full-data conditions and maintains robust clustering performance under extremely sparse data scenarios, significantly outperforming conventional knowledge tracing models. The learned cognitive representations exhibit weak correlation with coarse-grained subject labels while effectively capturing latent functional characteristics of educational resources. By providing an efficient mechanism for high-dimensional sequential representation learning and feature discrimination, the proposed framework offers valuable insights for educational data mining, adaptive instructional design, and data-driven resource classification strategies that are relevant to intelligent tutoring systems and personalized learning applications.
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