远程监督关系抽取通过自动对齐自然语言文本与知识库生成带有标签的训练数据集,解决样本人工标注的问题。目前的远程监督研究大多没有关注到长尾(long-tail)数据,因此远程监督得到的大多数句包中所含句子太少,不能真实全面地反映数据的...远程监督关系抽取通过自动对齐自然语言文本与知识库生成带有标签的训练数据集,解决样本人工标注的问题。目前的远程监督研究大多没有关注到长尾(long-tail)数据,因此远程监督得到的大多数句包中所含句子太少,不能真实全面地反映数据的情况。因此,提出基于位置-类型注意力机制和图卷积网络的远程监督关系抽取模型PG+PTATT。利用图卷积网络GCN聚合相似句包的隐含高阶特征,并对句包进行优化以此得到句包更丰富全面的特征信息;同时构建位置-类型注意力机制PTATT,以解决远程监督关系抽取中错误标签的问题。PTATT利用实体词与非实体词的位置关系以及类型关系进行建模,减少噪声词带来的影响。提出的模型在New York Times数据集上进行实验验证,实验结果表明提出的模型能够有效解决远程监督关系抽取中存在的问题;同时,能够有效提升关系抽取的正确率。展开更多
In this letter,the cosmic distance-duality relation has been constrained with a model-independent method by combining the baryon acoustic oscillation(BAO)data and the type Ia supernova(SNe Ia)data.The results show tha...In this letter,the cosmic distance-duality relation has been constrained with a model-independent method by combining the baryon acoustic oscillation(BAO)data and the type Ia supernova(SNe Ia)data.The results show that this relation is consistent with the observational data in the 68.27%error range,except for the instance of Union 2.1 plus BAO with the statistic errors only,where the relation is consistent with the observations in the 95.45%error range.To study the result of the uncertainty of the Hubble constant on the investigation of this relation,we treat the dimensionless Hubble constant h as a free parameter and get that the observational data favors the relation in the 68.27%error range.And then h has been marginalized and the results support that this relation is favored by the observations in the 68.27%error range too.展开更多
The Heisenberg commutation relation, QP P Q = ihI, is the most fundamental relation of quantum mechanics. Heisenberg's encoding of the ad-hoc quantum rules in this simple relation embodies the character-istic inde...The Heisenberg commutation relation, QP P Q = ihI, is the most fundamental relation of quantum mechanics. Heisenberg's encoding of the ad-hoc quantum rules in this simple relation embodies the character-istic indeterminacy and uncertainty of quantum theory. Representations of the Heisenberg relation in various mathematical structures are discussed. In particular, after a discussion of unbounded operators affiliated with finite von Neumann algebras, especially, factors of Type Ⅱ1 , we answer the question of whether or not the Heisenberg relation can be realized with unbounded self-adjoint operators in the algebra of operators affiliated with a factor of type Ⅱ1 .展开更多
文摘远程监督关系抽取通过自动对齐自然语言文本与知识库生成带有标签的训练数据集,解决样本人工标注的问题。目前的远程监督研究大多没有关注到长尾(long-tail)数据,因此远程监督得到的大多数句包中所含句子太少,不能真实全面地反映数据的情况。因此,提出基于位置-类型注意力机制和图卷积网络的远程监督关系抽取模型PG+PTATT。利用图卷积网络GCN聚合相似句包的隐含高阶特征,并对句包进行优化以此得到句包更丰富全面的特征信息;同时构建位置-类型注意力机制PTATT,以解决远程监督关系抽取中错误标签的问题。PTATT利用实体词与非实体词的位置关系以及类型关系进行建模,减少噪声词带来的影响。提出的模型在New York Times数据集上进行实验验证,实验结果表明提出的模型能够有效解决远程监督关系抽取中存在的问题;同时,能够有效提升关系抽取的正确率。
基金supported by the Foundation of the Guizhou Provincial Education Department of China under Grants No.KY[2016]104the National Natural Science Foundation of China under Grants Nos.11465011 and 11865018the Foundation of Guizhou Provincial Science and Technology of China under Grants No.J[2014]2150.
文摘In this letter,the cosmic distance-duality relation has been constrained with a model-independent method by combining the baryon acoustic oscillation(BAO)data and the type Ia supernova(SNe Ia)data.The results show that this relation is consistent with the observational data in the 68.27%error range,except for the instance of Union 2.1 plus BAO with the statistic errors only,where the relation is consistent with the observations in the 95.45%error range.To study the result of the uncertainty of the Hubble constant on the investigation of this relation,we treat the dimensionless Hubble constant h as a free parameter and get that the observational data favors the relation in the 68.27%error range.And then h has been marginalized and the results support that this relation is favored by the observations in the 68.27%error range too.
文摘The Heisenberg commutation relation, QP P Q = ihI, is the most fundamental relation of quantum mechanics. Heisenberg's encoding of the ad-hoc quantum rules in this simple relation embodies the character-istic indeterminacy and uncertainty of quantum theory. Representations of the Heisenberg relation in various mathematical structures are discussed. In particular, after a discussion of unbounded operators affiliated with finite von Neumann algebras, especially, factors of Type Ⅱ1 , we answer the question of whether or not the Heisenberg relation can be realized with unbounded self-adjoint operators in the algebra of operators affiliated with a factor of type Ⅱ1 .
