APPLICATION OF MACHINE LEARNED BAYESIAN NETWORKS TO DETECTION OF ANOMALIES IN COMPLEX SYSTEMS
First Claim
1. A computer-implemented method for anomaly detection, the method comprising:
- in response to a set of data for anomaly detection, applying a Bayesian belief network (BBN) model to the data set, including for each of a plurality of features of the BBN model, performing an estimate using known observed values associated with remaining features to generate a posterior probability for the corresponding feature; and
performing a scoring operation using a predetermined scoring algorithm on posterior probabilities of all of the features to generate a similarity score, wherein the similarity score represents a degree to which a given event represented by the data set is novel relative to historical events represented by the BBN model.
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Abstract
According to one embodiment, in response to a set of data for anomaly detection, a Bayesian belief network (BBN) model is applied to the data set, including for each of a plurality of features of the BBN model, performing an estimate using known observed values associated with remaining features to generate a posterior probability for the corresponding feature. A scoring operation is performed using a predetermined scoring algorithm on posterior probabilities of all of the features to generate a similarity score, wherein the similarity score represents a degree to which a given event represented by the data set is novel relative to historical events represented by the BBN model.
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Citations
36 Claims
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1. A computer-implemented method for anomaly detection, the method comprising:
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in response to a set of data for anomaly detection, applying a Bayesian belief network (BBN) model to the data set, including for each of a plurality of features of the BBN model, performing an estimate using known observed values associated with remaining features to generate a posterior probability for the corresponding feature; and performing a scoring operation using a predetermined scoring algorithm on posterior probabilities of all of the features to generate a similarity score, wherein the similarity score represents a degree to which a given event represented by the data set is novel relative to historical events represented by the BBN model. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A non-transitory machine-readable medium having instructions stored therein, which when executed by a processor, cause the processor to perform a method for anomaly detection, the method comprising:
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in response to a set of data for anomaly detection, applying a Bayesian belief network (BBN) model to the data set, including for each of a plurality of features of the BBN model, performing an estimate using known observed values associated with remaining features to generate a posterior probability for the corresponding feature; and performing a scoring operation using a predetermined scoring algorithm on posterior probabilities of all of the features to generate a similarity score, wherein the similarity score represents a degree to which a given event represented by the data set is novel relative to historical events represented by the BBN model. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A data processing system, comprising:
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a processor; and a memory storing instructions, which when executed from the memory, cause the processor to in response to a set of data for anomaly detection, apply a Bayesian belief network (BBN) model to the data set, including for each of a plurality of features of the BBN model, performing an estimate using known observed values associated with remaining features to generate a posterior probability for the corresponding feature, and perform a scoring operation using a predetermined scoring algorithm on posterior probabilities of all of the features to generate a similarity score, wherein the similarity score represents a degree to which a given event represented by the data set is novel relative to historical events represented by the BBN model.
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Specification