在现有的实体关系联合抽取任务中,级联解码的方法直接对三元组进行优化,解决了一部分重叠问题,但是在特定关系下解码的实体,造成实体识别不平衡问题。仅用集合预测的方法可以同时解码出实体和关系,虽然解决了三元组的顺序问题,但也导致...在现有的实体关系联合抽取任务中,级联解码的方法直接对三元组进行优化,解决了一部分重叠问题,但是在特定关系下解码的实体,造成实体识别不平衡问题。仅用集合预测的方法可以同时解码出实体和关系,虽然解决了三元组的顺序问题,但也导致实体之间联系性不强、实体和关系之间交互性差的问题。为了进一步提高联合抽取模型的效果,提出一种融合双阶段解码的实体关系联合抽取模型,包括级联策略下的实体解码与集合预测网络阶段的关系解码。该模型分为三个部分:采用Bert进行编码,有效关注到了上下文的信息;采用级联解码的策略先对实体识别,得到不受关系限制的实体信息,充分识别实体;将融合了实体信息的表示嵌入集合预测网络解码出实体-关系三元组,加强实体与关系的联系。在公开数据集纽约时报(The New York Times,NYT)、WebNLG和ACE2005上的实验结果表明,所提出的模型基本优于基线模型,验证了该模型的有效性。展开更多
A system of two separated computer-generated holograms termed cascaded Fresnel digital holography （CFDH） is proposed and its application to hiding information is demonstrated by a computer simulation experiment. The...A system of two separated computer-generated holograms termed cascaded Fresnel digital holography （CFDH） is proposed and its application to hiding information is demonstrated by a computer simulation experiment. The technique is that the reconstructed image is the result of the wave Fresnel diffraction of two sub-holograms located at different distances from the imaging plane along the illuminating beam. The two sub-holograms are generated by an iterative algorithm based on the projection onto convex sets. In the application to the hiding of optical information, the information to be hidden is encoded into the sub-hologram which is multiplied by the host image in the input plane, the other sub-hologram in the filter plane is used for the deciphering key, the hidden image can be reconstructed in the imaging plane of the CFDH setup.展开更多
文摘在现有的实体关系联合抽取任务中,级联解码的方法直接对三元组进行优化,解决了一部分重叠问题,但是在特定关系下解码的实体,造成实体识别不平衡问题。仅用集合预测的方法可以同时解码出实体和关系,虽然解决了三元组的顺序问题,但也导致实体之间联系性不强、实体和关系之间交互性差的问题。为了进一步提高联合抽取模型的效果,提出一种融合双阶段解码的实体关系联合抽取模型,包括级联策略下的实体解码与集合预测网络阶段的关系解码。该模型分为三个部分:采用Bert进行编码,有效关注到了上下文的信息;采用级联解码的策略先对实体识别,得到不受关系限制的实体信息,充分识别实体;将融合了实体信息的表示嵌入集合预测网络解码出实体-关系三元组,加强实体与关系的联系。在公开数据集纽约时报(The New York Times,NYT)、WebNLG和ACE2005上的实验结果表明,所提出的模型基本优于基线模型,验证了该模型的有效性。
文摘A system of two separated computer-generated holograms termed cascaded Fresnel digital holography （CFDH） is proposed and its application to hiding information is demonstrated by a computer simulation experiment. The technique is that the reconstructed image is the result of the wave Fresnel diffraction of two sub-holograms located at different distances from the imaging plane along the illuminating beam. The two sub-holograms are generated by an iterative algorithm based on the projection onto convex sets. In the application to the hiding of optical information, the information to be hidden is encoded into the sub-hologram which is multiplied by the host image in the input plane, the other sub-hologram in the filter plane is used for the deciphering key, the hidden image can be reconstructed in the imaging plane of the CFDH setup.
