Hitachi, Ltd.

Toru Hisamitsu

Makoto Iwayama

Yoshiki Niwa

Osamu Imaichi

Shingo Nishioka

Kazuyuki Shimada

Yoshihiro Shima

Tetsuo Nishikawa

Masakazu Fujio

Kunihiko Kido

Masayuki Ohta

Yoshihiko Nitta

Katsumi Marukawa

Jumpei Sato

Syuntaro Yui

Hiroaki Shimokawabe

Upon evaluation of a value of a diagnostic process, the value of a diagnostic process is evaluated not based on a simple cost but on a cost required for all processes of a patient who was in the diagnostic process through a follow-up survey. Diagnostic processes that are not relevant to a target diagnostic process are eliminated, clustering is performed on patients to divide the patients into clinically meaningful homogeneous groups, and the target diagnostic process is evaluated for each of the homogeneous groups. For the purpose, importance scores of data pieces of the clinical data are calculated and the relevant data is output using the output result of the medical knowledge extraction unit, clustering is performed on patients in the clinical data, and a clinical index and a cost are output for each of the clusters.

Diagnostic process analysis system

Ordering is properly performed for document databases registered in an associative search server. In an associative search server capable of performing an associative search by correlating a plurality of document databases, the history of the associative search is stored as an associative search recording table by associative search recording table storing means. By using this associative search recording table, a showing order of document databases presented by document database selecting means is properly set by showing order changing means. Alternatively, by registration fee calculating means, calculation is properly carried out as to registration fees of the document database registered in the associative search server.

Document retrieval system and search server

A system for displaying the results of a search provided by one of two different search systems enabling continuous searching. One search system includes a search takeover data production command used to output search takeover data articles from the search. The other search system includes a search takeover data reading command used to read search takeover data. A document identifier correspondence table associates the identifiers specified in the search takeover data. When a user clicks a search system transfer instruction button in one search system, the search takeover data producing command is executed to produce search takeover data which is passed to the other search system. The latter search system regards the list of identifiers of articles which was passed by the search takeover data reading command as the search results, and thus operates continuously.

Search system

The present invention visualizes the contents of a plurality of documents without a lack of the listing property. Two document units are extracted from a document database and relevance degrees between individual elements of a group of the document units are calculated. The results are displayed on a two-dimensional coordinate plane depending on the relevance degree.

Document information display system and method, and document search method

A known method for selecting words (or word sequences), which is an important aspect of information retrieval, involves the problems of inability to eliminate high-frequency common words and of often arbitrary setting of the threshold value for dividing important and unimportant words. These problems are solved by normalizing the difference between the word distribution in a subset of all documents containing a word to be extracted (or a subset of said document set) and the word distribution in the set of all documents with the number of words in the said subset of all documents containing the word as a parameter, and the accuracy of support information retrieval is thereby enhanced.

Word importance calculation method, document retrieving interface, word dictionary making method

A character recognition method is arranged to supplement an erroneously recognized character with a linguistic knowledge. In this method, the extraction of a candidate based on the search of a word dictionary occupies a large part of the operation. To speed up the extraction of a candidate word, therefore, the method is provided to search the dictionary by using a group of candidate characters or a dictionary header for processing an inflected form of a verb. Further, the present method is provided for calculating a word matching cost for improving an efficiency of modifying an erroneous recognition. The word search is done by using a 'hybrid method' arranged of 'candidate-character-driven word extraction' and 'dictionary-driven word extraction'. Moreover, the word-dictionary is arranged to have a header word composed of an inflectional ending of a verb and an auxiliary verb or a particle added to the tail of the inflectional ending. The present method attaches much importance to the difference of the matching cost about a character with a totally high confidence ratio than the difference of the matching cost about a character with a totally low confidence ratio.

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Oi, Japan

Toru Hisamitsu