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PUBMED数据库智能检索策略,采用了检索用词系统自动匹配技术,包括MESH主题词、文献中的文本词、期刊、作者等字段中的词汇,构置的检索策略全面、准确,能保证文献检索的查全率和查准率。
科研人员和检索查新人员在检索其它文献数据库时,可以参考应用PUBMED数据库的检索策略。
检索实例:艾滋病与肺癌(aids and lung cancer)
智能检索策略如下:
("acquired immunodeficiency syndrome"[MeSH Terms] OR ("acquired"[All Fields] AND "immunodeficiency"[All Fields] AND "syndrome"[All Fields]) OR "acquired immunodeficiency syndrome"[All Fields] OR "aids"[All Fields]) AND ("lung neoplasms"[MeSH Terms] OR ("lung"[All Fields] AND "neoplasms"[All Fields]) OR "lung neoplasms"[All Fields] OR ("lung"[All Fields] AND "cancer"[All Fields]) OR "lung cancer"[All Fields])
Result: 检索结果 | ||||
1181 | ||||
Stopword(s) Ignored: 禁用词 | ||||
and | ||||
Translations: 检索式 | ||||
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Database: 数据库 | ||||
PubMed | ||||
User query: 检索提问 | ||||
aids and lung cancer |
http://www.ncbi.nlm.nih.gov/pubmed/details?querykey=8
PUBMED数据库的检索用词是如何自动匹配的?
Untagged terms that are entered in the search box are matched (in this order) against a MeSH (Medical Subject Headings) translation table, a Journals translation table, the Full Author translation table, Author index, the Full Investigator (Collaborator) translation table and an Investigator (Collaborator) index.
When a match is found for a term or phrase in a translation table the mapping process is complete and does not continue on to the next translation table.
MESH主题词表中的词汇
The MeSH Translation Table contains:
If a match is found in this translation table, the term will be searched as MeSH (that includes the MeSH term and any specific terms indented under that term in the MeSH hierarchy), and in all fields.
For example, if you enter child rearing in the search box, PubMed will translate this search to: "child rearing"[MeSH Terms] OR ("child"[All Fields] AND "rearing"[All Fields]) OR "child rearing"[All Fields]
If you enter a MeSH Term that is also a Pharmacologic Action PubMed will search the term as [MeSH Terms], [Pharmacologic Action], and [All Fields].
If you enter an entry term for a MeSH term the translation will also include an all fields search for the MeSH term associated with the entry term. For example, a search for odontalgia will translate to: "toothache"[MeSH Terms] OR "toothache"[All Fields] OR "odontalgia"[All Fields] because Odontalgia is an entry term for the MeSH term toothache.
Substance name mappings do not include a mapping for individual terms in a phrase, e.g., IL-22 will not include IL[All Fields AND 22[All Fields].
MeSH term mappings that include a standalone number or single character do not include a mapping for individual terms in a phrase, e.g., Protein C will not include Protein[All Fields] or C[All Fields].
More information about automatic term mapping:
期刊相关信息
The Journals translation table contains the:
These will automatically map to the journal abbreviation that is used to search journals in PubMed and in all fields. For example, a search for endocrine pathology will translate to: "Endocr Pathol"[Journal] OR ("endocrine"[All Fields] AND "pathology"[All Fields]) OR "endocrine pathology"[All Fields]
作者全称
The full author translation table includes full author names for articles published from 2002 forward, if available. Enter a full author name in natural or inverted order, e.g., julia s wong or wong julia s.
More information about full author searching:
研究者(合作者)
If the term is not found in the above tables, except for Full Author, and is not a single term, the full investigator table is consulted for a match. The full investigator (collaborator) translation table includes full names, if available. Enter a full investigator name in natural or inverted order, e.g., harry janes or janes harry.
作者索引
If the term is not found in the above tables, except for Full Author or Full Investigator, and is not a single term, PubMed checks the author index for a match. PubMed automatically truncates a search for an author's name to account for varying initials, e.g., o'brien j retrieves o'brien ja, o'brien jb, o'brien jc jr, as well as o'brien j.
When combining multiple authors, to avoid a match with full author names, include initials or use the [au] search tag, e.g., ryan[au] james[au]. Author names comprised of only stopwords, e.g., as a, are not searched as authors if they are part of phrase, chemical burn as a danger, unless the search only includes the author name, e.g., as a.
研究者(合作者)索引
If the term is not found in the above tables, except for Full Author, Author, or Full Investigator, and is not a single term, PubMed checks the investigator index for a match.
没有匹配的信息怎么办?
PubMed breaks apart the phrase and repeats the above automatic term mapping process until a match is found. PubMed ignores stopwords in searches.
If there is no match, the individual terms will be combined (ANDed) together and searched in all fields.
http://www.ncbi.nlm.nih.gov/books/NBK3827/#pubmedhelp.How_PubMed_works_aut
采用PUBMED数据库的检索策略在生物学数据库(BIOSIS)中的检索结果如下:
BIOSIS Previews® |
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采用PUBMED数据库的检索策略在科学引文数据库(WEB OF SCIENCE)中的检索结果如下:
Web of Science® |
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采用PUBMED数据库的检索策略在Ovid MEDLINE(R) 1946 to Present with Daily Update中的检索结果如下:
syndromemesh
syndromemeshes
terms
sitting
sittings
term
termini
terminus
terminuses
term resin
temporary endodontic restorative material
acquiredall
acquiredalls
fields
field
fields stain
immunodeficiencyall
immunodeficiencyalls
syndromeall
syndromealls
aidsall
aidsalls
lung
lungfuls
lungs
respiratory system lung
pulm
pulmonary
lung structure
neoplasmsmesh
neoplasmsmeshes
lungall
lungalls
neoplasmsall
neoplasmsalls
cancerall
canceralls
acquired immunodeficiency
http://ovidsp.tx.ovid.com/sp-3.10.0b/ovidweb.cgi
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