Subjects: Library Science，Information Science >> Information Science submitted time 2024-04-24
Abstract： Abstract: Objective This paper reviews the relevant progress of semantic novelty research at home and abroad, and summarizes the relevant technologies to provide reference for the subsequent research. Coverage Using retrieval methods such as Novelty of the literature , semantic novelty , literature novelty , semantic novelty and literature evaluation , after reading and sorting, this paper traced the source of representative relevant theoretical researches, and finally selected 70 literatures for review. Methods This paper summarizes the relevant researches on semantic novelty at home and abroad, and analyzes the development status and future trend of semantic novelty evaluation in scientific and technological literature by focusing on the definition of novelty, evaluation indexes of novelty and different evaluation methods. Results Semantic novelty evaluation has gradually attracted widespread attention from the academic community. There have been related studies on semantic content mining and evaluation, but no unified measurement index has yet been formed. Limitations The existing literature novelty is mostly evaluated from external features, while the number of literatures directly focusing on semantic novelty is small, which has limitations in supporting the review. Conclusions The evaluation of semantic novelty of scientific and technological literature is based on the novelty of content. Quantitative research has become the mainstream research method, but the calculation method of evaluation index needs to be clarified, and the development direction of novelty evaluation should be combined with qualitative and quantitative methods to achieve a scientific and reasonable comprehensive evaluation.
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] This paper systematically reviews the theoretical basis and practical cases of domestic library new media mobile service research, sorts out their general characteristics, advantages and problems in research and practice, and proposes practical solutions to relevant problems.[Method/process] Taking "Sci-Think" as an example, this paper summarized its practice of service path, service mode and service ability.[Result/conclusion] "Sci-think" effectively solves the uncertain, unclear and incomplete orientation problems of new media services in China's libraries. Libraries need to speed up the transformation from traditional new media mobile service to new media mobile service with integrating multiple functions.
Subjects: Computer Science >> Natural Language Understanding and Machine Translation submitted time 2016-06-12
Abstract：随着电子商务的快速发展，互联网上出现大量商品评论信息，商品评论文本的情感分析与挖掘对于研究商品口碑、进行商品推荐都具有重要的价值。文中设计商品属性提取与过滤算法、情感词判别算法，分析商品的评论信息并自动抽取用户关注的商品属性和用户对相应属性的评价观点，进一步将其应用于商品评价文本的情感倾向性分析。在真实数据集上进行测试取得了准确率81.08%，召回率88.23%。
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