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Questions tagged [weights]

For questions about the concept of weight (or parameter) of a machine learning model, such as a neural network or a linear regression model.

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66 votes
12 answers
60k views

In a CNN, does each new filter have different weights for each input channel, or are the same weights of each filter used across input channels?

My understanding is that the convolutional layer of a convolutional neural network has four dimensions: ...
Ryan Chase's user avatar
6 votes
2 answers
2k views

Can neurons in MLP and filters in CNN be compared?

I know they are not the same in working, but an input layer sends the input to $n$ neurons with a set of weights, based on these weights and the activation layer, it produces an output that can be fed ...
Tibo Geysen's user avatar
16 votes
5 answers
3k views

Why are the initial weights of neural networks randomly initialised?

This might sound silly to someone who has plenty of experience with neural networks but it bothers me... Random initial weights might give you better results that would be somewhat closer to what a ...
Matas Vaitkevicius's user avatar
2 votes
0 answers
143 views

Are there any new weight initialization techniques for DNN published after 2015?

Considering weights initialization in my personal projects, I always used some standard techniques such as: Glorot (also known as Xavier) initialization (2010). Mertens initialization (2010). He ...
Stefano Barone's user avatar
2 votes
2 answers
1k views

In the multi-head attention mechanism of the transformer, why do we need both $W_i^Q$ and ${W_i^K}^T$?

In the Attention is all you need paper, on the 4th page, we have equation 1, which describes the self-attention mechanism of the transformer architecture $$ \text { Attention }(Q, K, V)=\operatorname{...
Uğurcan Özalp's user avatar
0 votes
0 answers
135 views

Using parameter estimation for training a neural network

Assume that we have 4 layers in a neural network. $$z_1 = L_1(x, W_1)$$ $$z_2 = L_2(z_1, W_2)$$ $$z_3 = L_3(z_2, W_3)$$ $$y = L_1(z_3, W_4)$$ Where $x$ is the vector input, $y$ is the vector output ...
euraad's user avatar
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