宋千里 1,2赖华 1,2
作者单位
摘要
1 昆明理工大学 信息工程与自动化学院,云南 昆明 650500
2 昆明理工大学 云南省人工智能重点实验室,云南 昆明 650500
在小语种舆情监控领域,由于小语种的标注语料难以获取,导致深度学习的训练效果较差。对于民间及媒体发表的新闻内容很难准确抽取其核心观点句,从而影响了进一步的舆情分析效果。为了将研究问题具体化,以越南语为例,提出一种融入共享主题特征的汉越跨语言新闻观点句的抽取方法,可以借助充足的汉语标注语料解决小语种资源稀缺问题,并利用双语可比语料间可共享的主题信息来优化抽取效果,进而提升舆情监控效果。具体方法为,提取汉越可比新闻的隐含狄利克雷分布(Latent Dirichlet Allocation, LDA)主题来构建共享主题特征,借助共享主题词典和情感词典训练双语词嵌入模型来共享汉越语义空间表征,将特征融入词向量,通过将语义信息与主题、情感、位置信息相结合来提升抽取效果。在汉越可比新闻数据集里进行的实验结果表明,融入共享主题特征能够提升小语种新闻观点句的抽取效果,F1值达到0.721,对小语种舆情监控起到支撑作用。
小语种舆情监控 跨语言观点句抽取 汉越可比新闻 双语词嵌入 共享主题表征 public opinion monitoring in minor languages cross-lingual opinion sentence extraction Chinese-Vietnamese comparable news bilingual word embedding shared topic representation 
红外与激光工程
2021, 50(S2): 20210298
Author Affiliations
Abstract
1 Nanophotonics Research Centre, Shenzhen University, Shenzhen, 518060, China
2 Merchant Venturers School of Engineering, University of Bristol, Bristol, UK
3 Optics Research Group, Delft University of Technology, Lorentzweg 1, Delft, The Netherlands
Amplitude, phase and polarization are essential parameters of an optical field. In the past decade, with the enhancement of techniques in manipulating phase and polarization states in complex optical fields, optical vortices and vector beams are investigated in a closely coupled fashion in terms of efficient beam generation and manipulation, stable transmission and novel detection aimed at various applications. In this special issue 6 invited papers demonstrate a number of typical topics in the field, with emphasis on the vectorial beam generation and optical communication systems utilising orbital angular momentum (OAM).
Other topics of general interest Other topics of general interest Announcements Announcements awards awards news news and organizational activities and organizational activities Physics literature and publications Physics literature and publications 
Photonics Research
2016, 4(5): 0500OVB1
Author Affiliations
Abstract
Photonics Research Editor-in-Chief Zhiping (James) Zhou and Deputy Editor Michael Fiddy report on the status of the journal as the fourth volume begins.
Announcements Announcements awards awards news news and organizational activities and organizational activities Physics literature and publications Physics literature and publications 
Photonics Research
2016, 4(1): 01000ED1

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