| 释义 |
stemmer
stem•mer (ˈstɛm ər)
n. a person or device that removes stems, as from tobacco or grapes. [1890–95] Thesaurus| Noun | 1. | stemmer - a worker who strips the stems from moistened tobacco leaves and binds the leaves together into bookssprigger, stripperworker - a person who works at a specific occupation; "he is a good worker" | | 2. | stemmer - a worker who makes or applies stems for artificial flowersworker - a person who works at a specific occupation; "he is a good worker" | | 3. | stemmer - an algorithm for removing inflectional and derivational endings in order to reduce word forms to a common stemstemming algorithmalgorithm, algorithmic program, algorithmic rule - a precise rule (or set of rules) specifying how to solve some problem | | 4. | stemmer - a miner's tamping bar for ramming packing in over a blasting chargetamp, tamper, tamping bar - a tool for tamping (e.g., for tamping tobacco into a pipe bowl or a charge into a drill hole etc.) | | 5. | stemmer - a device for removing stems from fruit (as from grapes or apples)device - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water" |
stemmer
stemmer (information science, human language)A program or algorithmwhich determines the morphological root of a given inflected(or, sometimes, derived) word form -- generally a written wordform.
A stemmer for English, for example, should identify thestring "cats" (and possibly "catlike", "catty" etc.) asbased on the root "cat", and "stemmer", "stemming", "stemmed"as based on "stem".
English stemmers are fairly trivial (with only occasionalproblems, such as "dries" being the third-person singularpresent form of the verb "dry", "axes" being the plural of"ax" as well as "axis"); but stemmers become harder to designas the morphology, orthography, and character encoding ofthe target language becomes more complex. For example, anItalian stemmer is more complex than an English one (becauseof more possible verb inflections), a Russian one is morecomplex (more possible noun declensions), a Hebrew one is evenmore complex (a hairy writing system), and so on.
Stemmers are common elements in query systems, since a userwho runs a query on "daffodils" probably cares about documentsthat contain the word "daffodil" (without the s).
(This dictionary has a rudimentary stemmer which currently(April 1997) handles only conversion of plurals to singulars).MedicalSeestemstemmer
Related to stemmer: stemming, Porter stemmerSynonyms for stemmernoun a worker who strips the stems from moistened tobacco leaves and binds the leaves together into booksSynonymsRelated Wordsnoun a worker who makes or applies stems for artificial flowersRelated Wordsnoun an algorithm for removing inflectional and derivational endings in order to reduce word forms to a common stemSynonymsRelated Words- algorithm
- algorithmic program
- algorithmic rule
noun a miner's tamping bar for ramming packing in over a blasting chargeRelated Wordsnoun a device for removing stems from fruit (as from grapes or apples)Related Words |