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Using Recurrent neural networks for real-time pattern recognition.

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Good evening everybody,
I'm developing a Neural Network (patternnet) for recognition of phases of a standardized movement composed by 4 sequential steps.
Now basically my observations are composed by the signal of 8 accelerometers sampled at 100 ms (since i want a real time classification) and the model works pretty fine. However my next attempt is to use just one accelerometer and since i'm losing information about the movement, i would like to introduce the information about the sequence of motion (A -> B -> C -> D).
Now i was thinking about using a RNN to develop this but i'm not sure how to prepare my data:
  • the dataset is composed by 6xN°observation which correspond to 1xN°classes (which are basically phases A B C or D);
  • every 100 ms i should classify one class based on the actual inertial signal and (possibly) the past phases detected;
Does someone have some hints or suggestion on how to implement it ?
In last weeks I considering use various option, and it seemed that starting from patternnet implementation of a classification problem represent a viable way to solve my question.
So basically i create a default network for pattern recognition:
and then i modify some options:
net.outputs{2}.feedbackMode='open' % create an openloop structure
net.inputConnect(1,2)=1 % connect the feedback input
now i have two inputs one external and one feedback supposedly from previous output states of my classifier, let's say I want my model being able to recognize a real time input relying on previous 4 classified outputs.
My first plan is to modify the feedbackDelay property of outputs{2}:
net.outputs{2}.feedback Delay=4;
But from looking at documentation i can also work directly on the input line, setting:
So my questions are :
1- There is a difference between these two modalities?
2- How can I set not a 4 tapped delay line but a 1:4 tapped delay line ?

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