About the thesaurus for the subject domain: equations of mixed type

Abstract

The search for mathematical articles on the Internet and related issues are discussed. The main problem of search are the features of the query formation and the presence of information noise. When using formulas in the search query, there are additional difficulties and additional information noise, although the goal is completely different-the specification of the query to obtain the pertinental, information. Difficulties are caused by the fact that not all are ready to use the symbolic notation in the search query, for example, TeX-notation, and publications are often presented in pdf-format. Information noise arises as a consequence of the search for formulas to within analogies. Problems are aggravated also if the formula does not have a generally accepted name, designations, unlike, for example, from such as the d'Alembert formula, the Tricomi equation, etc. There is one more circumstance that is not sufficiently discussed, namely, a rather complex mechanism for replenishing information resources with formulas that can and should be used in the search form. On the example of the thesaurus on the subject domain "mixed problems of mathematical physics", a variant of using formulas for searching mathematical articles is proposed. We consider a version of the work of a user knowledgeable in the subject domain with mathematical texts of a publication made using TeX-notation. A usual document markup mechanism is specified when there are keywords in secondary documents. Otherwise, using a frequency analysis, a local thesaurus or dictionary for the article is compiled. The dictionary article in this form contains all the fields for identifying the corresponding formulas in the text.

Expansion of subject domain of retrieval due to knowledge ontology of digital library LibMeta

“…Предлагается подход, основанный на учете смежных областей благодаря ассоциативным связям терминов тезауруса. Ранее была предложена технология пополнения тезауруса адресата, тезауруса по обыкновенным дифференциальным уравнениям и уравнениям смешанного типа [3][4]…”