Method and apparatus for detecting causality
First Claim
1. A causality detection apparatus for detecting causality of events based upon a database provided with log of the events, comprising:
- a sorter means for generating an event list by sorting in time sequence the events;
a frequency analysis means for calculating, based upon said event list, the number of appearances of an event set pair of a first event set and a second event set, the number of appearances of said first event set and the number of appearances of said second event set, said second event set occurring within a predetermined time period after a time of occurrence of said first event set; and
a causality detection means for detecting, based upon the number of appearances of said event set pair, upon the number of appearances of said first event set and upon the number of appearances of said second event set, significance of causality caused by said first event and said second event set occuring within said predetermined time period.
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Accused Products
Abstract
A causality detection apparatus for detecting causality of events based upon a database provided with log of the events includes a sorter module for generating an event list by sorting in time sequence the events, and a frequency analysis module for calculating, based upon the event list, the number of appearance of an event set pair <X,Y> of a first event set X(={ex1,ex2, . . . ,exn, . . . }, exn indicates an event and n is a natural number) and a second event set Y(={ey1,ey2, . . . ,eyn, . . . }, eyn indicates an event), the number of appearance of the first event set X and the number of appearance of the second event set Y. The event set pair <X,Y> has co-occurrence so that the second event set Y occurs within a predetermined time period (window size W) after a time of occurrence of the first event set X. The apparatus further includes a causality detection module for detecting, based upon the number of appearance of the event set pair <X,Y>, upon the number of appearance of the first event set X and upon the number of appearance of the second event set Y, significance of causality caused by the first event set X to occur the second event set Y within the window size W.
27 Citations
24 Claims
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1. A causality detection apparatus for detecting causality of events based upon a database provided with log of the events, comprising:
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a sorter means for generating an event list by sorting in time sequence the events; a frequency analysis means for calculating, based upon said event list, the number of appearances of an event set pair of a first event set and a second event set, the number of appearances of said first event set and the number of appearances of said second event set, said second event set occurring within a predetermined time period after a time of occurrence of said first event set; and a causality detection means for detecting, based upon the number of appearances of said event set pair, upon the number of appearances of said first event set and upon the number of appearances of said second event set, significance of causality caused by said first event and said second event set occuring within said predetermined time period. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A causality detection apparatus for detecting causality of events based upon a database provided with log of the events, comprising:
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a sorter means for generating an event list by sorting in time sequence the events; a frequency analysis means for calculating, based upon said event list, the number of appearances of an event pair of a first event and a second event, the number of appearance of the said first event and the number of appearances of said second event, said second event occurring within a predetermined time period after a time of occurrence of said first event; and a causality detection means for detecting, based upon the number of appearances of said event pair, upon the number of appearances of said first event and upon the number of appearances of said second event, significance of causality caused by said first event and said second event set occuring within said predetermined time period. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A causality detection method for detecting causality of events based upon a database provided with log of the events, said method comprising:
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a sorting step of generating an event list by sorting in time sequence the events; a frequency analysis step of calculating, based upon said event list, the number of appearances of an event set pair of a first event set and a second event set, the number of appearances of said first event set and the number of appearances of said second event set, said second event set occurring within a predetermined time period after a time of occurrence of said first event set; and a causality detection step of detecting, based upon the number of appearances of said event set pair, upon the number of appearances of said first event set and upon the number of appearances of said second event set, significance of causality caused by said first event and said second event set occuring within said predetermined time period. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A causality detection method for detecting causality of events based upon a database provided with log of the events, comprising:
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a sorting step of generating an event list by sorting in time sequence the events; a frequency analysis step of calculating, based upon said event list, the number of appearances of an event pair of a first event and a second event, the number of appearance of the said first event and the number of appearance of said second event, said second event occurring within a predetermined time period after a time of occurrence of said first event; and a causality detection step of detecting, based upon the number of appearance of said event pair, upon the number of appearances of said first event and upon the number of appearances of said second event, significance of causality caused by said first event and said second event set occuring within said predetermined time period. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification