期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Slang feature extraction by analysing topic change on social media
1
作者 Kazuyuki Matsumoto Fuji Ren +2 位作者 masaya matsuoka Minoru Yoshida Kenji Kita 《CAAI Transactions on Intelligence Technology》 2019年第1期64-71,共8页
Recently,the authors often see words such as youth slang,neologism and Internet slang on social networking sites(SNSs)that are not registered on dictionaries.Since the documents posted to SNSs include a lot of fresh i... Recently,the authors often see words such as youth slang,neologism and Internet slang on social networking sites(SNSs)that are not registered on dictionaries.Since the documents posted to SNSs include a lot of fresh information,they are thought to be useful for collecting information.It is important to analyse these words(hereinafter referred to as‘slang’)and capture their features for the improvement of the accuracy of automatic information collection.This study aims to analyse what features can be observed in slang by focusing on the topic.They construct topic models from document groups including target slang on Twitter by latent Dirichlet allocation.With the models,they chronologically the analyse change of topics during a certain period of time to find out the difference in the features between slang and general words.Then,they propose a slang classification method based on the change of features. 展开更多
关键词 SNSs SOCIAL MEDIA
下载PDF
Visible Light-Induced Photocatalysis on Carbon Nitride Deposited Titanium Dioxide: Hydrogen Production from Sacrificial Aqueous Solutions
2
作者 Shinya Higashimoto Kohji Hikita +5 位作者 Masashi Azuma Mari Yamamoto Masanari Takahashi Yoshihisa sakata masaya matsuoka Hisayoshi Kobayashi 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2017年第2期165-172,共8页
Carbon and nitrogen species-involved TiO2 (CN-TiO2) were systematically synthesized by thermal condensa- tion of cyanuric acid on the TiO2 surface. And the photocatalytic reactions for H2 production from sacrificial... Carbon and nitrogen species-involved TiO2 (CN-TiO2) were systematically synthesized by thermal condensa- tion of cyanuric acid on the TiO2 surface. And the photocatalytic reactions for H2 production from sacrificial aque- ous solutions were performed on several CN-TiO2 photocatalyst under visible-light irradiation. The photocatalytic activity of the CN-TiO2 was influenced by total amounts of carbon and nitrogen species, and the preferable activity was ten times higher than that of pristine carbon nitride. Here, the states of the CN-TiO2 photocatalyst were charac- terized by XPS, FT-IR and UV-Vis spectroscopy as well as DFT calculations. The photo-electrochemical measure- ments confirmed that the enhancement of H2 production is associated with effective charge separation under photo- excitation of highly dispersed carbon nitride on the TiO2 surface. 展开更多
关键词 carbon nitride TiO2 visible light photo-electrochemistry DFT calculation sacrificial H2 production
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部