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جستوجوی دقیق برای معنی 1. INTRODUCTION TO MANAGEMENT در واژهنامه ترجمیک
زمان جستجو: ۰.۰۰۱ هزارم ثانیه
درباره واژهنامه ترجمیک
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۰[توسط کاربر]
[... عمومی ...]
We have seen in the preceding chapters many alternatives in designing an
information retrieval (IR) system. How do we know which of these techniques
are effective in which applications? Should we use stop lists? Should
we stem? Should we use inverse document frequency weighting? IR has
developed as a highly empirical discipline, requiring careful and thorough
evaluation to demonstrate the superior performance of novel techniques on
representative document collections.
In this chapter, we begin with a discussion of measuring the effectiveness
of IR systems (Section 8.1) and the test collections that are most often used
for this purpose (Section 8.2). We then present the straightforward notion of
relevant and nonrelevant documents and the formal evaluation methodology
that has been developed for evaluating unranked retrieval results (Section
8.3). This includes explaining the kinds of evaluation measures that are
standardly used for document retrieval and related tasks like text classification
and why they are
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