National and University Library, Ljubljana (NUK)
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Avtomatsko krnjenje besedil s področja bibliotekarstva : magistrsko deloVilar, PolonaPredstavljena je priprava optimalnega algoritma za krnjenje bibliotekarskih besedil in njegova primerjava z dvema drugima algoritmoma za krnjenje, imenovanima Popovičev in generični. Popovičev je ... statističen algoritem, delujoč po principu najdaljšega ujemanja, s pravili za uporabo končnic in za popravljanje krnov. Oba druga je razvil Dimec s sodelavci. Generični algoritem deluje po principu najdaljšega ujemanja, z dodatno nalogo, preprečevati premočno krnjenje. Iz njega se je razvil optimalni algoritem, katerega namen je prilagajanje krnjenja strokovnim jezikom. Poskuša izoblikovati najdaljši, namesto najkrajšega krna in se s tem izogniti premalo natančnemu krnjenju. Za učenje algoritma je bilo uporabljenih 790.000 besed s področja bibliotekarstva. Zgrajeni so bili seznami krnov in končnic ter blokiranih besed. Testna faza je obsegala testiranje zgrajenih sestavnih delov algoritma z dodatnim korpusom, obsegajočim 167.000 besed. Sledi primerjava delovanja vseh treh algoritmov na istem korpusu. Ročno je pripravljen kontrolni rezultat krnjenja, z množicami semantično povezanih besed, zastopanih s krni, v katerem ni napak. S kontrolnim rezultatom so primerjani vsi trije algoritmi. Spremljano je premalo natančno krnjenje - koliko krnov, ki zastopajo semantično povezane besede, izdela posamezen algoritem. Rezultati so statistično obdelani s Kruskal-Wallisovim testom. Optimalni algoritem daje najboljše rezultate. Največkrat doseže popolno ujemanje z referenčnim rezultatom in hkrati izdela najmanj krnov za en semantični pomen. Sledi Popovičev z majhnim odstopanjem. Najmanj natančen je generični. Opisani postopki lahko predstavljajo izhodišče za nadaljno gradnjo orodij za avtomatsko indeksiranje dokumentov s področja bibliotekarstva in poizvedovanjepo njih.Type of material - master's thesis ; adult, seriousPublication and manufacture - Ljubljana : [P.Vilar], 2001Language - slovenianCOBISS.SI-ID - 15357794
Author
Vilar, Polona
Other authors
Maver, Jasna
Topics
Indeksiranje |
Avtomatsko indeksiranje |
Avtomatsko krnjenje |
Algoritmi |
Slovenščina |
Bibliotekarstvo |
Magistrske naloge
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Vilar, Polona | 19614 |
Maver, Jasna | 06618 |
Source: Personal bibliographies
and: SICRIS
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