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Noesis
Unsupervised Pattern Recognition (UPR)
Noesis offers very
advanced functions in acoustic emission or arbitrary data analysis and
clustering (data grouping). Unsupervised Pattern Recognition (UPR) is the
process by which mathematical algorithms and neural networks are used to
separate the data set (all data) into groups (clusters) which contain similar
data. The data are grouped as similar depending on their features and a
number of user choices. The user can select the features to be used for the
data clustering the method to be used (algorithm) and several other parameters
which can control / improve the method. The results can provide an insight to
the physical phenomena producing each type of emission. The various clusters
are shown in different (user defined) colors and labels and statistics are
calculated for each cluster (class). All actions are easily undone to provide a
high level of flexibility and user friendliness. The following is a list of the
functions available with UPR in Noesis:
-
UPR Wizard lets
even inexperienced users perform complex UPR algorithms. The wizard provides
information about pre-processing, UPR methods and method parameters and guides
the user. -
Data pre-processing,
feature selection, normalizing, projection generation etc. to assist in more
efficient and arithmetically solid clustering via UPR. -
Automatic pre-processing of any data
set. -
Multiple UPR algorithms,
including Neural Networks, for automatically clustering data (Max-Min Distance,
k-Means, LVQ Net etc.). -
All actions are applied to a Working
Copy of the data leaving the Main Data Set unaffected for
better result viewing and reporting. -
Manual clustering is
available for evaluation and classification using common AE practices (see also
Data Handling). -
Classification result output
to PAC (DTA, TDA or WFS) files (see also
Data Handling). -
Descriptive statistics regarding
classification (see also
Statistics).
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