• Proposes a comprehensive priority evaluation (CPE) method using web text, anchor text, and hyperlink context to reduce topic drift.
• Introduces an improved Bayesian classifier with weights (BCW) that adds label weights to feature words, boosting webpage classification accuracy.
• Develops a content block segmentation (CBS) technique based on backtracking to extract high-relevance hyperlinks and cross relevance tunnels.
• Validates the integrated BCW_CC strategy in rainstorm disaster and sports domains, showing improved focused crawling effectiveness.