الگوریتم MEAD

[MahdiAlHoseini]

بسم الله الرحمن الرحیم
با سلام
الگوریتم MEAD چه جوری عمل می کند؟
پاراگراف زیر قسمتی از یک مقاله است:
 Centroid-based methods: This type of methods ranks sentences
by computing their salience using a set of features. For example,
MEAD (Radev, Jing, Stys, & Tam, 2004) is a typical centroidbased
algorithm which extracts sentences according to three
parameters, i.e. centroid value, positional value, and first-sentence
overlap. The centroid value of a sentence is computed
as the average cosine similarity between the sentences and
the rest of the sentences in the document collection. The positional
value is computed as follows: the leading sentence is
assigned score 1 and the score decreases by 1=n for each sentence,
where n is the number of sentences in these documents.
The overlap value is computed as the cosine similarity between
a sentence and the first sentence in the same document. Then
the three values are linearly combined with equal weights.

با تشکر

[ravegoat]

با سلام،

در دو مقاله ی زیر تشریح شده است:
http://clair.si.umich.edu/~radev/papers/lrec-mead04.pdf
http://clair.si.umich.edu/~radev/papers/centroid.pdf (در بخش سوم)

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