Questions tagged [multilayer-perceptron]

For question about Multi Layer Perceptron model/architecture, its training and other related details and parameters associated with the model.

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Does a varying ANN model accuracy mean underfitting or overfitting?

Background: This is for a simulated robot with four legs, walking on a flat terrain. The ANN (an MLP) is given inputs as the robot's body angle, positions and angle of each leg with respect to the ...
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22 views

Applying Machine Learning to 2D Laser Scanner Data

We are using 2D Laser Scanner to scan various objects of different geometric shapes for e.g. cylinder, spiked, cylinder with notch, cylinder with curved edges e.t.c. The dataset contains points in the ...
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629 views

Why use a recurrent neural network over a feedforward neural network for sequence prediction?

If recurrent neural networks (RNNs) are used to capture prior information, couldn't the same thing be achieved by a feedforward neural network (FFNN) or multi-layer perceptron (MLP) where the inputs ...
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1answer
24 views

How can I access the weights at each training iteration of an MLP with scikit-learn?

I'm building an MLP with scikit-learn. Is there a way I can access the weights and biases of the output layer per iteration? There is an option mlp.coefs_, but it ...
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1answer
25 views

How can we print weights per iteration in a simple feed forward MLP for an specific class?

im working on a project in which I have to make a multi-layer perceptron with two hidden layers with 3 nodes in each. The target value in my data contains 8 unique values/classes. One of the tasks ...
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44 views

Is there data available about successful neural network architectures?

I am curious to if there is data available for MLP architectures in use today, their initial architecture, the steps that were taken to improve the architecture to an acceptable state and what the ...
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3answers
83 views

One vs multiple output neurons

Consider an MLP that outputs an integer 'rating' of 0 to 4. Would it be correct to say this could be modeled in either of the following ways: map each rating in the dataset to a 'normalized set' ...
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1answer
82 views

Backpropagation equation for a variant on the usual Linear Neuron architecture

Recently I encountered a variant on the normal linear neural layer architecture: Instead of $Z = XW + B$, we now have $Z = (X-A)W + B$. So we have a 'pre-bias' $A$ that affects the activation of the ...
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40 views

How can an ANN efficiently predict multiple numbers with fixed sum (in other words, proportions)?

I need a neural network (or any other solution) to predict 3 values which sum equals a fixed number (100). This will help me calculate proportions. Which is the most efficient way to do this? The ...
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1answer
20 views

Why are activation functions independent layers in CNNs rather than part of convolutional layers?

I have been reading up on CNNs. One of the different confusing things has been that people always talk of normalization layers. A common normalization layer is a ReLU layer. But I never encountered an ...
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2answers
54 views

Which online machine learning technique to use for multi-class classification problem with multiple inputs?

I have the following problem. We have $4$ separate discrete inputs, which can take any integer value between $-63$ and $63$. The output is also supposed to be a discrete value between $-63$ and $63$. ...
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Does skewed distribution for features in dataset impact neural network accuracy?

I am working on image classification problem where I have to identify whether given image is original one or disguised.During data analysis I found that data is evenly distributed amongst class/target ...
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2answers
98 views

How can a neural network learn to play sudoku?

I'm just beginning to understand neural networks and I've performed a couple of successful tests with numerical series where the NN was trained to find the odd one or a missing value. It all works ...
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3answers
903 views

Why MLP momentum term must be in the range 0-1?

Why momentum factor greater than 1 is a bad idea? What are the mathematical conclusions?
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1answer
120 views

Unable to overfit using MLP

I'm building a 5-class classifier with a private dataset. Each data sample has 67 features and there are about 40000 samples. Samples of a particular class were duplicated to overcome class imbalance ...
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0answers
199 views

Sigmoid output layer and Cross-Entropy cost function

I use Sigmoid activation function for neurons at output layer of my Multi-Layer Perceptron also, I use cross-entropy cost function. As I know when activation functions like Tanh is used in output ...
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1answer
66 views

How to deal with padded inputs in a fully connected feed forward network?

I have a fully connected network that takes in a variable length input padded with 0. However the network doesn't seem to be learning and I am guessing that the high number of zeros in the input ...
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1answer
144 views

Using a MLP to predict a 12x12 matrix

So, i need to use an MLP to predict a 12x12 matrix composed of floating points. The matrices are as this one that follows: Most matrices have this "pattern". As input, i have 7 floating points, ...
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1answer
210 views

Comments on my proposed “Jitter” neuron

I have an application of neural networks (standard MLP architecture) where I want to forecast a tanh output (ranging from -1 to +1) with about 1500 input features in ~700 samples. Each sample ...
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1answer
129 views

Is it a valid assumption that a purely MLP based tic-tac-toe player will learn lookahead strategies?

I'm doing a little tic-tac-toe project to learn neural networks and machine learning (beginner level). I've written a MLP based program that plays with other search based programs and trains with the ...
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1answer
374 views

Perceptions in a Neural network

In a Neural network, there is an input layer, any number of hidden layers, and an output layer. My question is: Are the input and output layer nodes actually perceptions? Or do they just signify what/...
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4answers
137 views

What are some datasets to train an MLP on simple tasks?

I have implemented an MLP. Now, I want to train it to solve simple tasks. Are there any data sets to train the MLP on simple tasks, that is, tasks with a small number of inputs and outputs? I ...
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1answer
2k views

Did Minsky and Papert know that multi-layer perceptrons could solve XOR?

In their famous book entitled Perceptrons: An Introduction to Computational Geometry, Minsky and Papert show that a perceptron can't solve the XOR problem. This contributed to the first AI winter, ...