{
  "paper": {
    "arxiv_id": "2502.03036",
    "title": "FuXi-α: Scaling Recommendation Model with Feature Interaction Enhanced Transformer",
    "url": "https://arxiv.org/abs/2502.03036"
  },
  "dataset": {
    "name": "MovieLens-1M",
    "users": 420,
    "items": 640,
    "full_catalog_evaluation": true
  },
  "setup": {
    "seed": 42,
    "mechanism": "multichannel_attention"
  },
  "baseline": {
    "name": "single-channel sequential attention",
    "hit_at_10": 0.14047619047619048,
    "ndcg_at_10": 0.07513562832974019,
    "mrr_at_10": 0.05541099773242629,
    "head_share_at_10": 0.21761904761904763
  },
  "method": {
    "name": "FuXi-α multi-channel attention + staged FFN",
    "hit_at_10": 0.14285714285714285,
    "ndcg_at_10": 0.07194173607324948,
    "mrr_at_10": 0.05069633408919124,
    "head_share_at_10": 0.3969047619047619
  },
  "relative": {
    "hit_at_10_percent": 1.694915254237282,
    "ndcg_at_10_percent": -4.250835891694408,
    "mrr_at_10_percent": -8.508534110866673,
    "head_share_at_10_percent": 82.38512035010942
  },
  "diagnostics": {
    "channels": [
      "temporal",
      "semantic",
      "popularity"
    ],
    "validation_blend_weight": 0.25,
    "validation_ndcg_candidates": [
      0.059212,
      0.054674,
      0.035001,
      0.029848
    ]
  },
  "paper_results": {
    "songs_played_percent": 4.67,
    "listening_duration_percent": 5.1
  },
  "scope": "实际计算时间、语义、流行度三个注意力通道及分阶段交互门控，并在完整候选集排序；未复刻华为音乐十亿级参数、私有连续特征和线上部署。",
  "schema_version": 2,
  "manifest_ref": "reproduction:fuxi-alpha",
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42
    ],
    "formal_comparison": false,
    "claim_policy": "single/few-seed smoke result; do not claim a stable improvement"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2502.03036-fuxi-alpha/metrics/movielens-1m-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}