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documents/DYCOS/Analyse.tex
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documents/DYCOS/Analyse.tex
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Für den DYCOS-Algorithmus wurde in \cite{aggarwal2011} bewiesen,
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dass sich nach Ausführung von DYCOS für einen unbeschrifteten
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Knoten mit einer Wahrscheinlichkeit von höchstens
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$(1-k)\cdot e^{-l \cdot b^2 / 2}$ eine Knotenbeschriftung ergibt, deren
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relative Häufigkeit weniger als $b$ der häufigsten Beschriftung ist.
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Dabei ist $k$ die Anzahl der Klassen und $l$ die Länge der
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Random-Walks.
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Außerdem wurde experimentell anhand des DBLP-Datensatzes\footnote{http://dblp.uni-trier.de/}
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und des CORA-Datensatzes\footnote{http://people.cs.umass.edu/~mccallum/data/cora-classify.tar.gz}
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gezeigt, dass die Klassifikationsgüte nicht wesentlich von der
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maximalen Listenlänge $a$ und der Anzahl der Wörter mit
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höchstem Gini-Koeffizient $m$ abhängt. Obwohl es sich nicht sagen lässt,
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wie genau die Ergebnisse aus \cite{aggarwal2011} zustande gekommen sind,
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eignet sich das Kreuzvalidierungsverfahren zur Bestimmung der Klassifikationsgüte
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wie es in \cite{Lavesson,Stone1974} vorgestellt wird:
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\begin{enumerate}
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\item Betrachte nur $V_{L,T}$.
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\item Unterteile $V_{L,T}$ zufällig in $k$ disjunkte Mengen $M_1, \dots, M_k$.
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\item \label{schritt3} Teste die Klassifikationsgüte, wenn die Knotenbeschriftungen
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aller Knoten in $M_i$ für DYCOS verborgen werden für $i=1,\dots, k$.
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\item Bilde den Durchschnitt der Klassifikationsgüten aus \cref{schritt3}.
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\end{enumerate}
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Es wird $k=10$ vorgeschlagen.
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@ -63,6 +63,9 @@
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\section{DYCOS}
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\input{DYCOS-Algorithmus}
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\section{Analyse des DYCOS-Algorithmus}
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\input{Analyse}
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\section{Probleme des DYCOS-Algorithmus}
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\input{SchwaechenVerbesserungen}
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@ -97,6 +97,51 @@
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address = {New York, NY, USA},
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}
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@MASTERSTHESIS{heck,
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AUTHOR = {Heck, Michael},
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TITLE = {Unsupervised Acoustic Model Training for Simultaneous Lecture Translation in Incremental and Batch Mode},
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SCHOOL = {Karlsruhe Institute of Technology},
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TYPE = {Diploma Thesis},
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ADDRESS = {Germany},
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MONTH = DEC,
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YEAR = 2012,
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PDF = {http://isl.anthropomatik.kit.edu/cmu-kit/downloads/Diplomarbeit_Heck_Michael.pdf}
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}
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@MASTERSTHESIS{Lavesson,
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AUTHOR = {Lavesson, Niklas},
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TITLE = {Evaluation and analysis of supervised learning algorithms and classifiers},
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SCHOOL = {Blekinge Institute of Technology},
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TYPE = {Diploma Thesis},
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ADDRESS = {Sweden},
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MONTH = DEC,
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YEAR = 2006,
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PDF = {http://www.bth.se/fou/Forskinfo.nsf/Sok/c655a0b1f9f88d16c125714c00355e5d/$file/Lavesson_lic.pdf}
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}
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@article{Stone1974,
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abstract = {{A generalized form of the cross-validation criterion is applied to the choice and assessment of prediction using the data-analytic concept of a prescri
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ption. The examples used to illustrate the application are drawn from the problem areas of univariate estimation, linear regression and analysis of variance.}},
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author = {Stone, M.},
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citeulike-article-id = {6758792},
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citeulike-linkout-0 = {http://dx.doi.org/10.2307/2984809},
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citeulike-linkout-1 = {http://www.jstor.org/stable/2984809},
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doi = {10.2307/2984809},
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issn = {00359246},
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journal = {Journal of the Royal Statistical Society. Series B (Methodological)},
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keywords = {biomarker, cross\_validation},
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number = {2},
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pages = {111--147},
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posted-at = {2011-08-02 14:22:37},
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priority = {2},
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publisher = {Blackwell Publishing for the Royal Statistical Society},
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title = {{Cross-Validatory Choice and Assessment of Statistical Predictions}},
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url = {http://dx.doi.org/10.2307/2984809},
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volume = {36},
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year = {1974}
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}
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@incollection{porter,
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author = {Porter, M. F.},
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chapter = {An Algorithm for Suffix Stripping},
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address = {San Francisco, CA, USA},
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}
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@incollection{szummer,
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title = {Partially labeled classification with Markov random walks},
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author = {Martin Szummer and Jaakkola, Tommi},
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