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融合字詞語(yǔ)義信息的獼猴桃種植領(lǐng)域命名實(shí)體識(shí)別研究
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國(guó)家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2020YFD1100601)、陜西省重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2021NY-138)和中央高?;究蒲袠I(yè)務(wù)專(zhuān)項(xiàng)資金項(xiàng)目(2452019064)


Kiwifruit Planting Entity Recognition Based on Character and Word Information Fusion
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    摘要:

    針對(duì)獼猴桃種植領(lǐng)域命名實(shí)體識(shí)別任務(wù)中實(shí)體詞復(fù)雜度較高,識(shí)別精確率較低的問(wèn)題,提出一種融合字詞語(yǔ)義信息的獼猴桃種植實(shí)體識(shí)別方法。以BiGRU-CRF為基本模型,融合詞級(jí)別和字符級(jí)別的信息。在詞級(jí)別上,通過(guò)引入詞集信息,并使用多頭自注意力(Multiple self-attention mechanisms,MHA)調(diào)整詞集中不同詞的權(quán)重;同時(shí)使用注意力機(jī)制忽略不可靠的詞集,將注意力集中在重要的詞集上,從而提高實(shí)體識(shí)別效果;在字符級(jí)別上,引入無(wú)監(jiān)督的基于轉(zhuǎn)換器的雙向編碼表征(Bidirectional encoder representations form transformers,BERT)預(yù)訓(xùn)練模型增強(qiáng)字的語(yǔ)義表示。在包含12477條標(biāo)注樣本和7個(gè)類(lèi)別實(shí)體的獼猴桃種植領(lǐng)域自制語(yǔ)料上進(jìn)行了實(shí)驗(yàn),結(jié)果表明,本文模型與SoftLexicon模型相比,F(xiàn)1值提高1.58個(gè)百分點(diǎn)。此外,本文模型在公開(kāi)數(shù)據(jù)集ResumeNER上與Lattice-LSTM、WC-LSTM等模型進(jìn)行實(shí)驗(yàn)對(duì)比取得了最佳效果,F(xiàn)1值達(dá)到96.17%,表明本文模型具有一定的泛化能力。

    Abstract:

    Aiming at the problem of high complexity of real words and low recognition accuracy in the named entity recognition task of kiwifruit planting field, a entity recognition method of kiwifruit planting integrating character and word information was proposed. Based on BiGRU-CRF model, word level and character level information were fused. At the word level, by introducing word set information and using multiple self-attention mechanisms (MHA) to adjust the weights of different words in the word set. At the same time, attention mechanism was used to ignore the unreliable word sets and focus on the important word sets to improve the entity recognition effect. At the character level, the unsupervised bidirectional encoder representations form transformers (BERT) pre-training model was introduced to enhance the semantic representation of words. Experiments were conducted on a homemade corpus in the kiwifruit cultivation domain containing 12477 annotated samples and seven categories of entities, and the results showed that the F1 value of the model was improved by 1.58 percentage points compared with the SoftLexicon model. In addition, the experimental comparison of the model ResumeNER with Lattice-LSTM, WC-LSTM and other models in the open data set ResumeNER was carried out, and the best recognition effect was achieved. The F1 value reached 96.17%, indicating that the method proposed had certain generalization ability.

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李書(shū)琴,張明美,劉斌.融合字詞語(yǔ)義信息的獼猴桃種植領(lǐng)域命名實(shí)體識(shí)別研究[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2022,53(12):323-331. LI Shuqin, ZHANG Mingmei, LIU Bin. Kiwifruit Planting Entity Recognition Based on Character and Word Information Fusion[J]. Transactions of the Chinese Society for Agricultural Machinery,2022,53(12):323-331.

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  • 收稿日期:2021-12-19
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  • 在線發(fā)布日期: 2022-01-24
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