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English(EN) RoPE Distinguishes Neither Positions Nor Tokens in Long Contexts, Provably

研究发现RoPE位置嵌入在长上下文模型中失效

一项新的理论分析揭示了旋转位置嵌入(RoPE)在用于长上下文Transformer模型时存在的根本性局限性。研究证明,随着上下文长度的增加,RoPE区分相邻和遥远位置的能力,以及其Token相关性的一致性,会下降到50%的概率,类似于随机猜测。调整RoPE参数可以在牺牲位置区分能力的情况下改善Token区分能力,但无法同时改善两者,这表明未来的长上下文模型需要新颖的位置编码机制。 AI

影响 指出了长上下文模型位置编码的核心局限性,并暗示了对新架构方法的需要。

排序理由 学术论文,对Transformer模型中的一个组件进行理论分析。[lever_c_demoted from research: ic=1 ai=1.0]

在 arXiv cs.CL 阅读 →

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研究发现RoPE位置嵌入在长上下文模型中失效

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学术论文,对Transformer模型中的一个组件进行理论分析。[lever_c_demoted from research: ic=1 ai=1.0]
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报道来源 [1]

  1. arXiv cs.CL TIER_1 English(EN) · Hao Peng ·

    RoPE 在长上下文环境中无法区分位置或 Token,可证

    We identify intrinsic limitations of Rotary Positional Embeddings (RoPE) in Transformer-based long-context language models. Our theoretical analysis abstracts away from the specific content of the context and depends only on its length. We prove that as context length increases, …