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concepts/perception-cognition-recommendation.md
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concepts/perception-cognition-recommendation.md
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title: "感知-认知推荐层次 (R0-R3)"
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created: 2026-06-10
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updated: 2026-06-10
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type: concept
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tags: [recommendation, reasoning, perception, cognition, hierarchy]
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sources: [raw/papers/onereason-team-onereason-2026.md]
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---
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# 感知-认知推荐层次 (R0-R3)
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> OneReason 提出的推荐推理四层递进体系:Perception → Derivation → Evolution → Recommendation。
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## 层次结构
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### R0: Perception(感知)
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**基础能力**:将 [[itemic-tokens|itemic token]] 扎根到其显式语义内容中。
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- Item Understanding:给定 item,生成自然语言描述
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- Itemic Pattern Grounding:给定描述,定位到对应 item
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- Item QA:基于 item 内容的问答
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**没有 R0,用户行为完全不可解读。**
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### R1: Derivation(推导)
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从单个 item 语义推理 item-to-item 关系。
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- 通过常识/知识关联从噪声交互历史中提取潜在兴趣
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- 任务:Item2Item 关联匹配
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### R2: Evolution(演化)
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将同一潜在兴趣的 item 建模为时序过程。
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- 捕捉长期/短期/周期性偏好
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- 任务:演化行为选择、演化主题生成、演化链直接生成
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### R3: Recommendation(推荐)
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在所有服务域中连贯推理,产出推荐决策。
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- 单域推荐(视频/商品/广告/直播)
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- 跨域推荐
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## 设计哲学
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推荐推理是 [[abductive-reasoning-recommendation|溯因 (Abductive)]] 而非演绎——从行为反推隐含兴趣点。R0-R3 层次将这一过程中每个诊断能力独立评估和训练。
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## 与 OneReason-Bench 的关系
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[[onereason-bench|OneReason-Bench]] 的评测体系直接对应 R0-R3 层次,作为训练各阶段的测量协议。
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## 参考
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- [[onereason|OneReason]]
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- [[recommendation-reasoning|推荐推理]]
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- [[recommendation-cot|推荐 CoT]]
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- [[onereason-bench|OneReason-Bench]]
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