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Спектральные характеристики в задачах обработки текстовой информации - PowerPoint PPT Presentation


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Спектральные характеристики в задачах обработки текстовой информации. Зябрев Илья Николаевич генеральный директор, AlterTrader Research Ltd. Базовая метрика спектральной модели -SLM. Нормализованная частота. TF ( L , d ) - внутренняя частота леммы L в документе d ,

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Спектральные характеристики в задачах обработки текстовой информации

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, AlterTrader Research Ltd.


-SLM

TF(L,d) - L d,

len(d) d

SF(L,v) , ,

L , v.


BM25 SLM ,


SLM

, , , DFR.

, , TF DF .

.


-2010


-

q , d

-

kdoc, ktitle, kbegin , . .

Mdoc(q, d) ;

Mtitle(q, d) ;

Mbegin(q, d) ;


SLM:

BM25:

DFR:


R1


R2


SLM

:

SLM ( )


SLM SLM


R1


R2



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