P process and apparatus for determining a match between several scintillations a question, and more events of a database. / p & & p & the method consists in using the tables of values of the data, each value representing the number of positions of events between the juxtaposition of an event of the question and a corresponding event of the data base, a group of values of the data being supplied to each of the events of the question and recorded in a monotonous in a memory (nozzle) corresponding. A manipulator arm 16 of the distributors detects that the values of data situated at the first end of the groups which is the largest and transfers it to a bag . A generator 18 then calculates a value of inaccuracy, which represents the sum of absolute values of the algebraic difference between the value of the bag and each of the values of the data available to the first extremity of the groups and in the other bags. The value of inaccuracy formed is compared with the value of the preceding it replaces if it is smaller. In this case, the value of the bag is loaded into a register of the value of position. / p
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