Abstract: A method and apparatus for performing a document information search to uncover specified text data containing a given search subject key word from a group of document text data stored in a memory. In the document information search method, two stages of presearch are carried out to perform the document search with respect to a desired subject key word. In a first stage of presearch, a character component table is generated in which the existence of character codes for every document is set forth with respect to all the character codes contained in the group of document text data of stored documents. The character component table is searched for all the character codes comprising a designated search subject key word to thereby extract all documents containing all the character codes comprising the search subject key word. Further, in the presearch step, all texts without the possibility of containing the search subject key word are eliminated.

Abstract: An apparatus having a storage device for storing information, a CPU for controlling the information and the overall apparatus, and a data bus connecting these constituent elements, there are disposed a plurality of retrieval devices for retrieving information so as to effect concurrent retrieval processing. The retrieval device includes a circuit to conduct a hardware retrieval, a processing unit to achieve a software retrieval, and a data bus connecting these components. The retrieval data is subdivided into partitions by the CPU so as to be subjected to parallel processing in the respective retrieval devices in a distributed fashion.

Abstract: Disclosed in this invention is a gas generating composition for air bags for automobiles, comprising sodium azide, aluminum sulfate, one of silicon dioxide, alumina and aluminum silicate, and preferably a lubricant and/or a binder. This composition has the advantages such as adequate speed of gas generation and small amount of heat and harmful substances produced when the gas is generated from the composition.

Abstract: A method and apparatus for making document information search and a magnetic disk unit to be used for realizing the method and apparatus. In the document information search method, in performing document search with respect to a desired subject key word, two stages of presearch are carried out. In a first stage of presearch (step 402), a character component table (500) in which existence of character codes for every document is stated with respect to all the character codes contained in the group of document text data of stored documents is generated, and the character component table is searched for all the character codes constituting a desiredly designated search subject key word to thereby extract all the documents each containing all the character codes constituting the search subject key word.

Abstract: A compact character string retrieving system capable of producing correctly the result of matching without omission even upon occurrence of multiple matching in which a plurality of search terms are matched for one character string by a finite automation. A destination state for transition brought about by a trailing character of the search term is newly created instead of an initial state. A transition table storage stores the destination state. On the basis of the source state number and a specified pattern character code, the destination state number is read out from the state transition table storage. When the state number read out represents the destination state of the transition brought about by the trailing character of the specified pattern character string, an identifier thereof is outputted. The identifiers of the search terms matched are each represented by one bit information, and a group of corresponding flags is stored in one slot. Multiple matching can be performed without omission.