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MeSHy：Mining unanticipated PubMed information

已有 2893 次阅读 2020-7-13 16:41 |个人分类:生物医学文本挖掘|系统分类:科研笔记| MeSH, 共现, 词对

T. Theodosiou et al. / Journal of Biomedical Informatics 44 (2011) 919–926

The basic assumption is that the terms that have almost the same probability of being observed within the results of a query and also in the entire PubMed database (excluding the results of the query) do not contain important information specific to the documents related to the query

基本假设是：一个词在检索结果文献集中被观察到的概率，如果与其在整个数据库（排除掉检索到文献集）中出现的概率无异的话，那么这词就不会包含重要的信息，这个信息的重要性是相对于与检索策略相关文献来说的。

用“jamia[jour]”检索所有发表在美国医学信息学会杂志的文章，结果是这样的：

pair	MeSH 1	MeSH category	MeSH 2	MeSH 1 - MeSH 2	score	PMID(order):year[:type(s)]
1	Pediatric Nurse Practitioners [rare]	Named Groups (6)	Pediatricians [rare]	Pediatric Nurse Practitioners [rare] - Pediatricians [rare]	8.110	28339689(689):
2	Whole Genome Sequencing [rare]		Whole Exome Sequencing [rare]	Whole Genome Sequencing [rare] - Whole Exome Sequencing [rare]	8.110	30535356(381):
3	Zika Virus [rare]		Zika Virus Infection [rare]	Zika Virus [rare] - Zika Virus Infection [rare]	8.110	28449047(647):
4	Cancer Survivors [rare]		Survivorship [rare]	Cancer Survivors [rare] - Survivorship [rare]	7.417	26714765(923):
5	Electronic Nicotine Delivery Systems [rare]		Vaping [rare]	Electronic Nicotine Delivery Systems [rare] - Vaping [rare]	7.417	28505280(641):
6	Cloud Computing [rare]	Information Science (3)	Semantic Web [rare]	Cloud Computing [rare] - Semantic Web [rare]	7.012	29648604(507):
7	phenomycin [rare]	Chemical and Drugs (1)	Big Data [norm]	phenomycin [rare] - Big Data [norm]	6.724	29126253(562):
8	Patient Generated Health Data [norm]		Survivorship [rare]	Patient Generated Health Data [norm] - Survivorship [rare]	6.501	26714765(923):

会不会太重视罕见词了呢？

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