9. An apparatus, implemented on a computer system, that builds an association tensor to facilitate document and word-level processing operations, comprising: a processor; a memory; a receiving mechanism configured to receive a collection of reference documents containing textual information; an association-tensor-building mechanism configured to build the association tensor representing pair-wise similarities corresponding to a co-occurrence of term pairs in the collection of reference documents; a lower-dimensionality-association-tensor computing mechanism configured to compute a lower-dimensional vector-space representation of terms that preserves the pair-wise similarities in the association tensor based on a singular value decomposition of the association tensor; a lower-dimensionality-matrix-deriving mechanism configured to derive a lower-dimensional vector-space representation of a document based on a weighted linear combination of computed term vectors in the lower-dimensional vector-space representation of the terms in the collection of reference documents; and a performing mechanism configured to perform semantic analysis upon the collection of reference documents using the lower-dimensional vector-space representation of the document.
9. An apparatus, implemented on a computer system, that builds an association tensor to facilitate document and word-level processing operations, comprising: a processor; a memory; a receiving mechanism configured to receive a collection of reference documents containing textual information; an association-tensor-building mechanism configured to build the association tensor representing pair-wise similarities corresponding to a co-occurrence of term pairs in the collection of reference documents; a lower-dimensionality-association-tensor computing mechanism configured to compute a lower-dimensional vector-space representation of terms that preserves the pair-wise similarities in the association tensor based on a singular value decomposition of the association tensor; a lower-dimensionality-matrix-deriving mechanism configured to derive a lower-dimensional vector-space representation of a document based on a weighted linear combination of computed term vectors in the lower-dimensional vector-space representation of the terms in the collection of reference documents; and a performing mechanism configured to perform semantic analysis upon the collection of reference documents using the lower-dimensional vector-space representation of the document. 12. The apparatus of claim 9 , wherein the collection of the reference documents is a World Wide Web (WWW) or a proprietary document collection; and wherein while building the association tensor, the tensor-building mechanism is configured to use a search engine to query the collection of the reference documents to determine the pair-wise similarities.