Abstract: A method, a computer system, and a program product for retrieving and/or ranking documents in a database.

Abstract: A method and a system for sorting a specific collection of documents in various orderings, and defining a new ranking metrics by composing multiple ranking to provide a user with highly relevant search results is provided. Collections of documents are sorted with multiple ranking metrics, a new collection of documents in higher-ranking positions of the sorted collections of documents is determined; and an arithmetical operation between the new collections of documents in higher-ranking positions is performed. A search result is determined by the documents in higher-ranking positions as result of the arithmetical operation. Final search results are acquired by performing an arithmetical operation among specific (with fixed search results) collections of documents sorted in various orderings. The most suitable arrangement of search results can be specified by interactively combining such ranking metrics.

Abstract: [Objective] To provide an information retrieval system, a method for information retrieval, a program for executing the information retrieval, and a storage medium comprising the program for executing the information retrieval

Abstract: The present invention discloses a method, a computer system, a program product which provide a useful interface to rank the documents in a very large database using neural network(s).

Abstract: The present invention provides a data hiding method of hiding media data in message data and a data extraction method of extracting the hidden data wherein message data is dispersively hidden in media data such as an image or sound to prevent a third person from modifying the message data easily.

Abstract: A method, a computer system, and a program product for retrieving and/or ranking documents in a database.

Abstract: The present invention discloses a computer system and program product. A computer system including an algorithm for computing a characteristic value of a matrix comprising steps of; providing a first matrix comprising M rows and N columns (M-by-N matrix); providing second matrixes by randomly selecting rows from the first matrix, each of the second matrixes including predetermined numbers of rows smaller than the numbers of rows of the first matrix; computing the characteristic values for the second matrixes; plotting each of the characteristic values with respect to the predetermined numbers of rows; and extrapolating the plots to said number of rows of the first matrix so as to obtain a characteristic value of the first matrix.

Abstract: Detecting and tracking of new events/classes of documents are disclosed. A method for detecting new events and/or classes of documents and tracking evolution thereof in a database, said new events and/or classes of said documents being added to said database, said documents including attribute data related to a temporal parameter, said method includes the steps of providing vectors of said documents related to attribute data including said temporal parameter included therein, and detecting said new events and classes and tracking the evolution thereof using said vectors.

Abstract: The present invention provides a data hiding method of hiding media data in message data and a data extraction method of extracting the hidden data wherein message data is dispersively hidden in media data such as an image or sound to prevent a third person from modifying the message data easily.More specifically, the present invention relates to a data hiding method in which media data is expressed as a media array while message data is expressed as a message array so that the array elements of the message array can be dispersively hidden in the message array based on a state values specifying a particular array element of the media array, comprising the steps of:(a) determining the j-th (j.gtoreq.0) state value S.sub.j ;(b) determining (j+1)-th state value S.sub.

Abstract: A speech synthesis system making use of a pitch-synchronous waveform overlap method to realize stable speech synthesis processing in which pitch shaking is negligible. The present invention is characterized in that glottal closure instants are used as reference points (pitch marks) for overlapping. Since the glottal closure instants can be extracted stably and accurately by using dyadic Wavelet conversion, speech in which pitch shaking is negligible and rumbling sounds are minimized can be synthesized stably. In addition, more flexible waveform separation becomes possible by setting the reference point for overlapping and the reference point for waveform separation to different positions. The extraction of glottal closure instants is performed by searching the local peaks of the dyadic Wavelet conversion, but preferably a threshold value for searching for the local peaks of the dyadic Wavelet conversion is adaptively controlled each time dyadic Wavelet conversion is obtained.