Patent ID: 11885720
Assignee: NEC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. An information processing apparatus comprising:
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to:
determine a plurality of first periods during which a measurement target is in a normal state, based on data measured from the measurement target;
determine a second period during which the measurement target is in an anomalous state, based on the data measured from the measurement target and a threshold;
for each first period, extract, from first time series data of the each first period, a first combination of a plurality of parameters in which a first value of a first parameter is maximum for a first given value of a second, as a normal period maximum value;
extract, from second time series data of the second period, a second combination of the plurality of parameters in which a second value of the first parameter is maximum for a second given value of the second parameter, as an anomalous period maximum value;
update the threshold used to determine whether the measurement target is in the anomalous state, as the normal period maximum value of one of the first periods, based on the normal period maximum value of each first period and based on the anomalous period maximum value; and
determine that the measurement target is in the anomalous state based on the updated threshold.