谷歌学术
Gives access to online education and research articles. Several languages and automatic translation also. Note: not everything is 100% free,
资源
图书馆、数据库、存储库、分类广告
英国EThOS学位论文搜索
Search over the 500k UK theses from over 120 UK institutions: the Electronic Theses Online Service (EThOS), operated by the
核心研究论文搜索
“The world’s largest collection of open access research papers” we could not describe better. 207+ million of them. Sortable by
世界科学研究门户
Aggregates 200 international research institutions and permits a centralized search on their research articles and databases. If you must start
ProQuest 出版物检索
Search millions of worldwide research publications. Integral or abstract view, up to the last 10 years, from 9000+ publishers. Free
电工百科 电工技术词汇
由国际电工委员会（又称 IEC）维护的 Electropedia 提供了用于电气和电子领域的所有术语和定义。
全球贸易项目代码 (GTIN) 规则
A comprehensive site to explain all rules, how and when, to define a new set of GTIN or EAN code,
生命周期评估数据库
Biggest repository of free and paid LCA databases. No Life Cycle Assessment without these: the openLCA Nexus service is a
MDPI科学出版物期刊
One of the largest scientific publication stream, with more than 450 journals, topic dedicated (applied science, sustainability, sensors, healthcare, micromachines,
超棒的公共数据集
To our knowledge, the largest directory of publicly available datasets: the “Awesome Public Datasets” repository is a community-driven directory that