Later, the suspect's father (who was also a suspect in the drug raid) found the documents, which contained information about a confidential DEA informant who had helped build the case.
All scientifically relevant keywords contained within individual abstracts were extracted, constructing a phenotype concept profile and allowing the calculation of inverse document frequency (IDF) scores ie a score relating the number of resulting documents which contained the keywords in question.
Information Retrieval – gathering documents which contain key words or phrases.
I encourage you to read both documents, which contain details about new and ongoing work in these areas.
But the current White House blocked the release of those documents, which contain confidential communications between President Reagan and his advisers, including Mr. Bush's father, George Bush, who was Mr. Reagan's vice president.
"This was only supposed to take 10 minutes," Mr. Cheney told investigators, according to the documents, which contain summaries of interviews with the two pilots as well as other reports in the inquiry.
The climatic conditions of older periods, however, have to be "reconstructed" with the help of historical documents (which contain figures on food production, the length of growing seasons, and the duration of ice on bodies of water) and other indirect measures of climate (including "climate proxies" such as tree rings, ice cores, and sediment cores).
With a search tool such as Google or indexed searches made available by Lexis-Nexis, Westlaw, or the World Legal Information Institute, the legal researcher can input key words into a search and get in return a (usually long) list of documents which contain, or are indexed by, those key words.
Document frequency is calculated by the number of documents which contain a specific term in the corpus of documents.
"Senior government sources confirmed that China had also cracked the encrypted documents, which contain details of secret intelligence techniques and information that could allow British and American spies to be identified," the newspaper added.
If n is used to denote the number of documents which contain t in the training set, the calculation formula of idf t is as follows: {idf}_{t}=logleft(frac{N}{n}right) (6).
