Implementation and Application of Automata : 6th International Conference, CIAA 2001, Pretoria, South Africa, July 23-25, 2001. Revised Papers

TheCIAAconferenceseriesprovidesaforumforthenewproblemsand challenges. Intheseconferences,boththeoreticalandpracticalresultsrelatedto theapplicationandimplementationofautomatawerepresentedanddiscussed, andsoftwarepackagesandtoolkitsweredemonstrated. Theparticipantsofthe conferenceserieswerefrombothresearchinstitutionsandindustry. Wethankalloftheprogramcommitteemembersandrefereesfortheire?orts inrefereeingandselectingpapers. Thisvolumewaseditedwithmuchhelpfrom NanetteSaesandHannekeDriever,whiletheconferenceitselfwasrunsmoothly withthehelpofElmarieWillemse,NanetteSaes,andTheoKoopman. VI Foreword WealsowishtothanktheSouthAfricanNRF(forfundingairfares)andthe DepartmentofComputerScience,UniversityofPretoria,fortheir?nancialand logisticsupportoftheconference. WealsothanktheeditorsoftheLectureNotes inComputerScienceseriesandSpringer-Verlag,inparticularAnnaKramer,for theirhelpinpublishingthisvolume. October2002 BruceW. Watson DerickWood CIAA 2001 Program Committee BernardBoigelot Universit´edeLiege,Belgium Jean-MarcChamparnaud Universit´edeRouen,France MaximeCrochemore UniversityofMarne-la-Vall´ee,France OscarIbarra UniversityofCaliforniaatSantaBarbara,USA LauriKarttunen XeroxPaloAltoResearchCenter,USA NilsKlarlund AT&TLaboratories,USA DenisMaurel Universit´edeTours,France MehryarMohri AT&TLaboratories,USA Jean-EricPin Universit´eParis7,France KaiSalomaa Queen’sUniversity,Canada HelmutSeidl TrierUniversity,Germany BruceWatson(Chair) UniversityofPretoria,SouthAfrica EindhovenUniversity,TheNetherlands DerickWood(Co-chair) HongKongUniversityofScience andTechnology,China ShengYu UniversityofWesternOntario,Canada Table of Contents UsingFiniteStateTechnologyinNaturalLanguageProcessingofBasque. . . 1 I˜nakiAlegria,MaxuxAranzabe,NereaEzeiza,AitzolEzeiza, andRubenUrizar CascadeDecompositionsareBit-VectorAlgorithms. . . . . . . . . . . . . . . . . . . . . . . . 13 AnneBergeronandSylvieHamel SubmoduleConstructionandSupervisoryControl:AGeneralization. . . . . . . 27 Gregorv. Bochmann CountingtheSolutionsofPresburgerEquations withoutEnumeratingThem. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 BernardBoigelotandLouisLatour Brzozowski’sDerivativesExtendedtoMultiplicities. . . . . . . . . . . . . . . . . . . . . . . . 52 Jean-MarcChamparnaudandG´erardDuchamp FiniteAutomataforCompactRepresentation ofLanguageModelsinNLP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 JanDaciukandGertjanvanNoord PastPushdownTimedAutomata. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 ZheDang,Tev?kBultan,OscarH. Ibarra,andRichardA. Kemmerer SchedulingHardSporadicTasksbyMeans ofFiniteAutomataandGeneratingFunctions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 Jean-PhilippeDubernardandDominiqueGeniet Bounded-GraphConstruction forNoncanonicalDiscriminating-ReverseParsers. . . . . . . . . . . . . . . . . . . . . . . . . . 101 JacquesFarr´eandJos´eFortesGalvez ´ Finite-StateTransducerCascadetoExtractProperNamesinTexts. . . . . . . 115 NathalieFriburgerandDenisMaurel IsthisFinite-StateTransducerSequentiable?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 Tamas ´ Ga´al CompilationMethodsofMinimalAcyclicFinite-StateAutomata forLargeDictionaries. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135 JorgeGran ˜a,Fco. MarioBarcala,andMiguelA. Alonso BitParallelism–NFASimulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 149 JanHolub ImprovingRasterImageRun-LengthEncodingUsingDataOrder. . . . . . . . . 161 MarkusHolzerandMartinKutrib X Table of Contents EnhancementsofPartitioningTechniques forImageCompressionUsingWeightedFiniteAutomata . . . . . . . . . . . . . . . . . 177 FrankKatritzke,WolfgangMerzenich,andMichaelThomas Extractionof -CyclesfromFinite-StateTransducers. . . . . . . . . . . . . . . . . . . . . . 190 Andr´e