{"id":6105,"date":"2026-10-19T09:48:28","date_gmt":"2026-10-19T09:48:28","guid":{"rendered":"https:\/\/phd.hi.is\/doktorsvorn\/doktorsvorn-i-reikniverkfraedi-markus-gotz\/"},"modified":"2026-10-19T09:48:28","modified_gmt":"2026-10-19T09:48:28","slug":"doktorsvorn-i-reikniverkfraedi-markus-gotz","status":"publish","type":"phd_defence","link":"https:\/\/phd.hi.is\/en\/doktorsvorn\/doktorsvorn-i-reikniverkfraedi-markus-gotz\/","title":{"rendered":"Doktorsv\u00f6rn \u00ed reikniverkfr\u00e6\u00f0i: Markus G\u00f6tz"},"content":{"rendered":"
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Doktorsefni:<\/strong> Markus G\u00f6tz<\/p>\n

Heiti ritger\u00f0ar:<\/strong> Skalanleg gagnagreining me\u00f0 ofurt\u00f6lvum<\/p>\n

Andm\u00e6lendur<\/strong><\/p>\n

Dr. H\u00e5kan Grahn, pr\u00f3fessor \u00ed T\u00f6lvuverkfr\u00e6\u00f0i vi\u00f0 T\u00e6knih\u00e1sk\u00f3lann \u00ed Blekinge, Sv\u00ed\u00fej\u00f3\u00f0<\/p>\n

Dr. Shantenu Jha, pr\u00f3fessor \u00ed t\u00f6lvunarfr\u00e6\u00f0i vi\u00f0 Rutgers H\u00e1sk\u00f3lann \u00ed Bandar\u00edkjunum.<\/p>\n

Lei\u00f0beinandi: <\/strong>Dr. Morris Riedel, gestad\u00f3sent vi\u00f0 IVT-deild H\u00cd<\/p>\n

A\u00f0rir \u00ed doktorsnefnd: <\/strong>Dr. \u00d3lafur P\u00e9tur P\u00e1lsson og Dr. Matthias Book, pr\u00f3fessorar vi\u00f0 IVT-deild H\u00cd<\/p>\n

Doktorsv\u00f6rn st\u00fdrir:<\/strong> Kristj\u00e1n J\u00f3nasson, forseti I\u00f0na\u00f0arverkfr\u00e6\u00f0i- v\u00e9laverkfr\u00e6\u00f0i og t\u00f6lvunarfr\u00e6\u00f0ideildar<\/p>\n

\u00c1grip af ranns\u00f3kn: <\/strong>\u00c1 s\u00ed\u00f0astli\u00f0num \u00e1ratug hefur or\u00f0i\u00f0 mikil aukning \u00ed framlei\u00f0slu og geymslu gagna \u00ed i\u00f0na\u00f0i sem og ranns\u00f3knum. \u00der\u00e1tt fyrir a\u00f0 gagnagreining s\u00e9 ekki n\u00fd af n\u00e1linni, stendur h\u00fan frammi fyrir \u00feeirri \u00e1skorun a\u00f0 r\u00e1\u00f0a vi\u00f0 s\u00edauki\u00f0 magn, bandv\u00eddd og fl\u00e6kjustig gagna. \u00deetta gerir hef\u00f0bundnar a\u00f0fer\u00f0ir \u00f3skilvirkar og hefur \u00feetta vandam\u00e1l veri\u00f0 nefnt gagnagn\u00f3tt (e. Big Data). \u00cd v\u00edsindum koma g\u00f6gn helst fr\u00e1 umfangsmiklum tilraunum og hermunum. Hinga\u00f0 til hefur ekki veri\u00f0 fyllilega unni\u00f0 \u00far g\u00f6gnunum, heldur hafa \u00feau veri\u00f0 geymd \u00ed gagnageymslum fyrir greiningu s\u00ed\u00f0ar meir, vegna skorts \u00e1 skilvirkum \u00farvinnslua\u00f0fer\u00f0um. Af \u00feessu m\u00e1 draga \u00fe\u00e1 \u00e1lyktun a\u00f0 til a\u00f0 greina \u00feessi g\u00f6gn \u00feurfi v\u00ed\u00f0t\u00e6ka umgj\u00f6r\u00f0 fyrir gagnagreiningu og algr\u00edmas\u00f6fn og er t\u00f6lvuumhverfi\u00f0 sem mi\u00f0a\u00f0 er vi\u00f0, misleit kerfi sem \u00e6tlu\u00f0 eru fyrir st\u00f3rfellda t\u00f6lvuvinnslu (e. high performance computing).<\/p>\n

\u00deessi ritger\u00f0 leggur til h\u00f6nnun og frumger\u00f0ar\u00fatf\u00e6rslu \u00e1 sl\u00edkri umgj\u00f6r\u00f0 sem byggir \u00e1 reynslu sem fengin er \u00far raunverulegum notkunard\u00e6mum, einkum jar\u00f0v\u00edsindum. S\u00e9rstaklega voru sko\u00f0u\u00f0 d\u00e6mi um merkingu \u00fatl\u00edna hluta \u00ed punktask\u00fdsg\u00f6gnum og l\u00edffr\u00e6\u00f0ilegu myndefni, \u00fatlagar (e. outliers) \u00ed haffr\u00e6\u00f0ilegum t\u00edmara\u00f0ag\u00f6gnum og flokkun \u00e1 fjark\u00f6nnunarmyndefni. Til a\u00f0 r\u00e1\u00f0a vi\u00f0 hi\u00f0 mikla magn gagna voru tv\u00f6 greiningaralgr\u00edm a\u00f0l\u00f6gu\u00f0 fyrir samhli\u00f0a vinnslu \u00ed kerfum me\u00f0 samnota- og dreift minni. \u00deetta eru HPDBSCAN, sem er kl\u00f6sunara\u00f0fer\u00f0 bygg\u00f0 \u00e1 \u00fe\u00e9ttif\u00f6llum og Distributed Max-Trees, s\u00edunaralgr\u00edm fyrir myndir. B\u00e1\u00f0ar a\u00f0fer\u00f0ir voru f\u00e6r\u00f0ar yfir \u00ed almenna frumger\u00f0 sem einfaldar framsetningu skalanlegra algr\u00edma fyrir a\u00f0rar samb\u00e6rilegar greiningara\u00f0fer\u00f0ir. \u00dear a\u00f0 auki gerir \u00feetta kleift a\u00f0 setja fram skilgreiningu \u00e1 \u00fe\u00f6rfum fyrir h\u00f6nnun v\u00ed\u00f0t\u00e6kra gagnagreiningaumgjar\u00f0ar og s\u00f6fn algr\u00edma fyrir misleit kerfi \u00e6tlu\u00f0 til dreif\u00f0rar st\u00f3rt\u00e6krar t\u00f6lvuvinnslu. A\u00f0 lokum er frumger\u00f0 \u00e1 \u00fatf\u00e6rslu sl\u00edkrar umgjar\u00f0ar kynnt sem nefnd er Juelich Machine Learning Library, sem veitir a\u00f0gang a\u00f0 l\u00e1gt\u00e6knieiningum og tilb\u00fanum \u00fatf\u00e6rslum \u00e1 greiningaralgr\u00edmum.<\/p>\n

Lykilor\u00f0 \u2014Gagnagreining, Gagnagreiningaumgj\u00f6r\u00f0, Reiknigreind, Ofurt\u00f6lvureikningar, Jar\u00f0v\u00edsindi, Raund\u00e6mi.<\/p>\n

Um doktorsefni\u00f0: <\/strong><\/p>\n

BS pr\u00f3f \u00ed uppl\u00fdsingat\u00e6kniverkfr\u00e6\u00f0i 2010 fr\u00e1 H\u00e1sk\u00f3lanum \u00ed Potsdam, \u00de\u00fdskalandi<\/p>\n

MS pr\u00f3f \u00ed s\u00f6mu grein \u00a0fr\u00e1 sama sk\u00f3la 2013.<\/p>\n

Kv\u00e6ntur Ewa G\u00f6tz.<\/p>\n

Facebook vibur\u00f0ur<\/a><\/p>\n<\/div><\/div>","protected":false},"featured_media":1901,"template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_phd_date_start":"2017-12-05T14:00:00+00:00","_phd_date_end":"2017-12-05T17:00:00+00:00","_phd_location":"A\u00f0albygging H\u00e1t\u00ed\u00f0asalur","_phd_admission":"A\u00f0gangur \u00f3keypis","_phd_thesis_title":"Skalanleg gagnagreining me\u00f0 ofurt\u00f6lvum","_phd_source_url":"https:\/\/gamli.hi.is\/vidburdir\/doktorsvorn_i_reikniverkfraedi_markus_gotz","_phd_source_node_id":"309158","_phd_source_type":"vidburdir","_phd_member_id":521,"footnotes":""},"phd_school":[108,93],"phd_discipline":[112],"class_list":["post-6105","phd_defence","type-phd_defence","status-publish","has-post-thumbnail","hentry","phd_school-idnadarverkfraedi-velaverkfraedi-og-tolvunarfraedideild","phd_school-verkfraedi-og-natturuvisindasvid","phd_discipline-phd-i-reikniverkfraedi"],"_links":{"self":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6105","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence"}],"about":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/types\/phd_defence"}],"version-history":[{"count":0,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_defence\/6105\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media\/1901"}],"wp:attachment":[{"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/media?parent=6105"}],"wp:term":[{"taxonomy":"phd_school","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_school?post=6105"},{"taxonomy":"phd_discipline","embeddable":true,"href":"https:\/\/phd.hi.is\/en\/wp-json\/wp\/v2\/phd_discipline?post=6105"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}