omputer Science For the following values, explain whether we can efficiently get the value from a default (standard) inverted index postings file. By efficiently we mean with one lookup--not scanning the entire index. Symbol Value |d| total number of terms in a given doc |d|u number of unique terms in a given doc df(w) number of documents term w appears in c(w, C) number of times term w occurs in corpus C c(w, d) number of times term w occurs in document d p(w, d) probability of term w occurring in document d   a. p(w,d)   b. |d|u   c. |d|   d. df(w)   e. c(w,C)   f. c(w,d)

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Computer Science

  1. For the following values, explain whether we can efficiently get the value from a default (standard) inverted index postings file. By efficiently we mean with one lookup--not scanning the entire index.

    Symbol Value
    |d| total number of terms in a given doc
    |d|u number of unique terms in a given doc
    df(w) number of documents term w appears in
    c(w, C) number of times term w occurs in corpus C
    c(w, d) number of times term w occurs in document d
    p(w, d) probability of term w occurring in document d
      a.

    p(w,d)

      b.

    |d|u

      c.

    |d|

      d.

    df(w)

      e.

    c(w,C)

      f.

    c(w,d)

     
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