stemmer 音标拼音: [st'ɛmɚ]
除梗机; 导火线; 炮棍
除梗机; 导火线; 炮棍
stemmer n 1 :
a worker who strips the stems from moistened tobacco leaves and binds the leaves together into books [
synonym : {
stripper },
{
stemmer }, {
sprigger }]
2 :
a worker who makes or applies stems for artificial flowers 3 :
an algorithm for removing inflectional and derivational endings in order to reduce word forms to a common stem [
synonym :
{
stemmer }, {
stemming algorithm }]
4 :
a miner '
s tamping bar for ramming packing in over a blasting charge 5 :
a device for removing stems from fruit (
as from grapes or apples )
Stemmer \
Stem "
mer \,
n .
One who ,
or that which ,
stems (
in any of the senses of the verbs ).
[
1913 Webster ]
A program or {algorithm }
which determines the morphological root of a given inflected
or , sometimes , derived ) word form -- generally a written word
form .
A stemmer for English , for example , should identify the
string } "cats " (and possibly "catlike ", "catty " etc .) as
based on the root "cat ", and "stemmer ", "stemming ", "stemmed "
as based on "stem ".
English stemmers are fairly {trivial } (with only occasional
problems , such as "dries " being the third -person singular
present form of the verb "dry ", "axes " being the plural of
ax " as well as "axis "); but stemmers become harder to design
as the morphology , orthography , and {character encoding } of
the target language becomes more complex . For example , an
Italian stemmer is more complex than an English one (because
of more possible verb inflections ), a Russian one is more
complex (more possible noun declensions ), a Hebrew one is even
more complex (a {hairy } writing system ), and so on .
Stemmers are common elements in {query } systems , since a user
who runs a query on "daffodils " probably cares about documents
that contain the word "daffodil " (without the s ).
This dictionary } has a rudimentary stemmer which currently
April 1997 ) handles only conversion of plurals to singulars ).
1997 -04 -09 )
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