1. PubMed Advanced Search Example (Advanced SearchExample)
Task (task): To search the literature of "uncertainty quantification" (find the literature of "uncertainty quantification").
Step 1 : Analyze the topic
Uncertainty quantification (UQ) plays a key role in reducing uncertainty in optimization and decision-making processes and is used to address various practical applications in science and engineering. Everyday scenarios involve uncertainty in various domains, from investment opportunities and medical diagnoses to sports games and weather forecasts, and in all cases the goal is to make decisions based on collected observations and knowledge of the uncertain domain.
Step 2: Enter the advanced search interface.
Because it involves: ① uncertainty quantification ( uncertainty quantification ) ② accidental uncertainty ( aleatoric quantification ) ③ cognitive uncertainty ( epistemic quantification ) and other search terms, it is suitable to use advanced search methods, because advanced search can handle multiple logical relationship between search terms. What needs to be reminded here is that every time we switch the search method, we need to enter the home page first (by clicking the icon "PubMed").
Then enter the advanced search interface on the home page.
Step 3: In the advanced search interface, use the "Add with OR" button to search for " uncertainty quantification ( uncertainty quantification ) ② accidental uncertainty ( aleatoric quantification ) ③ epistemic quantification " search terms (in English) Type into the search box.
Note that the search keywords are enclosed in English "" here
检索式如下：(("uncertainty quantification") OR ("aleatoric quantification")) OR ("epistemic quantification")
Step 4: Get hit documents.
(1) Limited to 13-23 years: research + review
(2) Limited to 13-23 years: comprehensive
(3) Limited to 19-23 years: research + review
(4) Limited to 19-23 years: comprehensive
Step 5: Extract relevant information according to the requirements of the question.
1 ) Search Access: Advanced Search;
2）Search Expression（检索表达式）:(("uncertainty quantification") OR ("aleatoric quantification")) OR ("epistemic quantification")
3 ) Search Result (number of retrieved records):
| research + review | Review | |
| 13-23 years | 987 | 50 |
| 19-23 | 738 | 41 |
4 ) Extracted bibliographical records:
omit
2. Pubmed topic retrieval example (MeSH Database Examples)
(1) Analyze the search target
This goal involves two topics: uncertainty quantification (uncertainty quantification), drug (drugs), two topics need to be extracted from the topic approach and matched with the corresponding sub-theme words.
(2) Subject search process
1) On the Pubmed homepage, select MeshDatabase to enter the topic path, and use uncertainty quantification and drug to search respectively.
Figure 1 Click on "Mesh Database" on the homepage of Pubmed to enter the subject path
Figure 2 Enter the first topic concept word " uncertainty quantification " on the topic approach (MeSH) interface (it is not known whether it is a topic word at this time)
As shown in the figure above, there are no related keywords. If " uncertainty quantification " ranks first, it means that it is a keyword
Search " uncertainty quantification " directly in pubmed phrase (13-23 years)
Starting from another topic concept "drug", the operation steps are the same as before. It should be noted that you need to return to the Pubmed homepage to enter other search methods. The method is to click the "Pubmed" icon on the upper left of the search result interface. Remember remember.
search in pubmed
Through the above steps, we obtained 970 documents of "uncertainty quantification" and 78322 documents of "drugDrug Carriers". The next thing to do is to use the logical symbol "AND" to logically combine the above two document sets to obtain their intersection literature. How to do it in Pubmed system? The answer is through its "Advanced Search". Still need to go back to the Pubmed homepage, click "Advanced Search" to enter. In the advanced search interface, you can see the search history, select the search formula, and click "Add in builder".
After clicking "Add in builder" for both search numbers "#8 and #10", the search box will display the standardized search expression "("uncertainty quantification" AND (2013:2023[pdat])) AND ("Drug Carriers "[Mesh] AND (2003:2023[pdat]))", click "Search" to get the hit documents.
The search results are as follows
