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Query expansion — (QE) is the process of reformulating a seed query to improve retrieval performance in information retrieval operations. [cite journal last = Vectomova | first = Olga | coauthors = Wang, Ying | year = 2006 title = A study of the effect of term… … Wikipedia
Tf–idf — The tf–idf weight (term frequency–inverse document frequency) is a weight often used in information retrieval and text mining. This weight is a statistical measure used to evaluate how important a word is to a document in a collection or corpus.… … Wikipedia
Vector space model — (or term vector model ) is an algebraic model for representing text documents (and any objects, in general) as vectors of identifiers, such as, for example, index terms. It is used in information filtering, information retrieval, indexing and… … Wikipedia
Latent semantic analysis — (LSA) is a technique in natural language processing, in particular in vectorial semantics, of analyzing relationships between a set of documents and the terms they contain by producing a set of concepts related to the documents and terms. LSA was … Wikipedia
Real estate appraisal — Real estate appraisal, property valuation or land valuation is the practice of developing an opinion of the value of real property, usually its Market Value. The need for appraisals arises from the heterogeneous nature of property as an… … Wikipedia
Alfred Winslow Jones — Infobox Person name = Alfred Winslow Jones caption = birth date = 9 September 1900 birth place = Melbourne, Australia death date = 2 June 1989 death place = Redding, Connecticut, United States residence = Redding, Connecticut New York City known… … Wikipedia
Modern portfolio theory — Portfolio analysis redirects here. For theorems about the mean variance efficient frontier, see Mutual fund separation theorem. For non mean variance portfolio analysis, see Marginal conditional stochastic dominance. Modern portfolio theory (MPT) … Wikipedia
TREX search engine — SAP NetWeaver TREX= TREX is a search engine in the SAP NetWeaver integrated technology platform produced by SAP AG. The TREX engine is a standalone component that can be used in a range of system environments but is used primarily as an integral… … Wikipedia
MIMO — This article is about MIMO in wireless communication. For other uses, see MIMO (disambiguation). Understanding of SISO, SIMO, MISO and MIMO (note that the terms input and output refer to the radio channel carrying the signal, not to the devices… … Wikipedia
Psychoacoustics — is the study of subjective human perception of sounds. Alternatively it can be described as the study of the psychological correlates of the physical parameters of acoustics. Background Hearing is not a purely mechanical phenomenon of wave… … Wikipedia
The Bell Curve — For other uses, see Bell curve (disambiguation). The Bell Curve … Wikipedia
