3 items
极研期刊助手在文献页面显示极阅 Data 提供的期刊指标和来源。 极研期刊助手（JiYan Journal Companion）属于极研 / JiYan Research 科研产品家族，把公开期刊元数据带回你的文献阅读流程。在支持的 PubMed、PMC 和 Google Scholar 页面，扩展会根据页面公开显示的 ISSN 或期刊名称查询极阅 Data（JiYue Data），并展示： • JCR 影响因子、四分位和排名 • CAS 分区和 Top 标记 • CCF、CCF-T 与新锐期刊目录信息 • 预警信号、来源、年份和数据版本 扩展只发送期刊 ISSN 或规范化名称，不上传论文正文、PDF、页面 URL、Cookie、账号或浏览历史。所有结果带有来源标签和版本信息；ShowJCR 数据不代表 Clarivate 官方 JCR 产品。
rating_count is the Chrome Web Store ratings count, not a written-review count.
Media assets
Screenshots and videos on the listing.
Has promo video
Whether the listing includes at least one video.
Languages
Declared language locales.
Developer website
Listing exposes a developer website URL.
Contact email
Listing exposes a contact email.
Keyword in name
Case-insensitive substring match in the name.
Keyword in description
Case-insensitive substring match in the description.
Keyword occurrences in description
Count of case-insensitive occurrences in the description.
Category user-count percentile
Share of same-category extensions with fewer users (null if unknown).
These are transparent listing completeness / keyword signals, not a prediction of Chrome Web Store search ranking.