Abbreviations

AP

average precision

ASR

automatic speech recognition

CLEF

Cross-Language Evaluation Forum

CSA

Cambridge Scientific Abstracts

DFR

divergence from randomness

EM

expectation maximization

eMAP

expected MAP

eR-prec

expected R-precision

eP10

expected precision at rank 10

ESA

explicit semantic analysis

INEX

Initiative for the Evaluation of XML Retrieval

GIRT

German Indexing and Retrieval Testdatabase

IDF

inverse document frequency

IR

information retrieval

LDA

latent dirichlet allocation

LM

language model

LOD

Linked Open Data

LSA

latent semantic analysis

LSI

latent semantic indexing

MAP

mean average precision

MBF

model-based feedback

MeSH

Medical Subject Headings

MLE

maximum likelihood expansion

ML

maximum likelihood

MRR

mean reciprocal rank

NB

naive bayes

NDCG

normalized discounted cumulative gain

NLLR

normalized log-likelihood ratio

NLM

U.S. National Library of Medicine

NTCIR

NII Test Collection for IR Systems

ODP

Open Directory Project

P5

precision@5

P10

precision@10

PLSI

probabilistic latent semantic indexing

PRP

probability ranking principle

PRF

pseudo relevance feedback

QL

query likelihood

RM

relevance model

R-prec

R-precision

SA

Sociological Abstracts

SW

semantic web

SVM

support vector machine

TF

term frequency

TREC

Text Retrieval Conference

VSM

vector space model

WSD

word sense disambiguation