Spatio-Temporal Self Organising Map
First Claim
1. A method of classifying a data record as belonging to one of a plurality of classes, the data records comprising a plurality of data samples, each sample comprising a plurality of features derived from a value sampled from a sensor signal at a point in time, the method including:
- (a) defining a selection variable indicative of the temporal variation of the sensor signals within a time window;
(b) defining a selection criterion for the selection variable;
(c) comparing a value of the selection variable to the selection criterion to select an input representation for a self organising map, the map having a plurality of input and output units, and deriving an input from the data samples within the time window in accordance with the selected input representation; and
(d) applying the input to a self organising map corresponding to the selected input representation and classifying the data record based on a winning output unit of the self organising map.
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Accused Products
Abstract
A method of classifying a data record as belonging to one of a plurality of classes, the data records comprising a plurality of data samples, each sample comprising a plurality of features derived from a value sampled from a sensor signal at a point in time, the method including: defining a selection variable indicative of the temporal variation of the sensor signals within a time window; defining a selection criterion for the selection variable; comparing a value of the selection variable to the selection criterion to select an input representation for a self organising map, the map having a plurality of input and output units, and deriving an input from the data samples within the time window in accordance with the selected input representation; and applying the input to a self organising map corresponding to the selected input representation and classifying the data record based on a winning output unit of the self organising map.
49 Citations
16 Claims
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1. A method of classifying a data record as belonging to one of a plurality of classes, the data records comprising a plurality of data samples, each sample comprising a plurality of features derived from a value sampled from a sensor signal at a point in time, the method including:
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(a) defining a selection variable indicative of the temporal variation of the sensor signals within a time window; (b) defining a selection criterion for the selection variable; (c) comparing a value of the selection variable to the selection criterion to select an input representation for a self organising map, the map having a plurality of input and output units, and deriving an input from the data samples within the time window in accordance with the selected input representation; and
(d) applying the input to a self organising map corresponding to the selected input representation and classifying the data record based on a winning output unit of the self organising map. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of training a classifier for classifying a data record as belonging to one of a plurality of classes, the data record comprising a plurality of data samples and each sample comprising a plurality of features derived from a value sampled from a sensor signal at a point in time, the method including:
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(a) computing a derived representation representative of a temporal variation of the features of a dynamic data record within a time window; (b) using the derived representation as an input for a second self-organised map; and (c) updating the parameters of the self-organised map according to a training algorithm. - View Dependent Claims (15, 16)
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Specification