Questions tagged [attention]

Methods for aggregating a set feature vectors into a single feature vector relevant to a context.

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Is it true that Bahdanau's attention mechanism is not Global like Luong's?

I was reading the pytorch tutorial on a chatbot task and attention where it said: Luong et al. improved upon Bahdanau et al.’s groundwork by creating “Global attention”. The key difference is that ...
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139 views

Why do attention models need to choose a maximum sentence length?

I was going through the seq2seq-translation tutorial on pytorch and found the following sentence: Because there are sentences of all sizes in the training data, to actually create and train this ...
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26 views

Attention weights for identifying influence

This question concerns the application of self-attention weights for identifying influence of words in sentences. For instance, we are performing a classification task on a set of sentences (e.g. ...
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39 views

Attention mechanism in LSTM model to predict next action

I have a dataset. Each data point of this set contains a variable length of sequences with 7 letters. For example, Data point 1 has a sequence (A, A, B, E, B, C, D, E, D.....). I used LSTM to predict ...
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25 views

performing function (maxcol) across the column

I'm currently going through this paper: Bidirectional Attention Flow for Machine Comprehension, Seo, Minjoon, et al. (2016) They perform a $max_{col}$ function over a matrix $S \in \mathbb R^{TxJ}$: ...
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55 views

Encoding Layers in the Transformer

In the transformer architecture for NLP, at each layer there are multiple self-attention filters. My question is about the encoded content within these filters. An example can be found here: My ...
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1answer
50 views

How to use/treat a hidden layer as the new target to predict in a neural network?

Let's suppose I have a neural network with one hidden layer. During training, for a given pair of (input, target), I want to perform several iterations, such that the first iteration would be trying ...
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37 views

Attention for short sequence length. Is it reasonable?

Will the attention mechanism be useful for the short sequence length? Let's say your training corpus has each query of MAX length 10. and most queries are of word length 3-4 words. How reasonable is ...
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1answer
138 views

Hard attention loss function

I am referring to paper: Show, Attend and Tell: Neural Image Caption Generation with Visual Attention (page 4). I wished to know, why we look to maximize the lower bound of the log likelihood ...
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22 views

How does network structure (model complexity) affects covergence speed?

I trained Bi-GRU and HAN (Hierarchical Attention Networks) on my own datasets, and found HAN converges faster than Bi-GRU, within less number of epochs. What would be the reason for this? I guess ...
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505 views

On masked multi-head attention and layer normalization in transformer model

I came to read Attention is All you Need by Vaswani. There two questions came up to me: 1. How is it possible to mask out illegal connections in decoder multi-head attention? It says by setting ...
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114 views

Custom Loss Function - Inducing sparsity

From the comments, I realized that my question wasn't clear enough, so I'll start with a short background. I am trying to construct an attention model that performs classification based on just a ...
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172 views

Can attention be implemented without encoder / decoder?

I just got into models beyond biLSTM, would like to start with applying attention to my existing network (RNN). I find examples for attention always with encoder decoder architecture, however is it ...
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82 views

What are paralell training and attention mechanism?

I read a quite interesting paper here: http://hanj.cs.illinois.edu/pdf/kdd18_cyang.pdf Accordingly, the basic idea is to combine clustering and churn prediction so that it can imply some insight from ...
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430 views

How to use the transformer for inference

I am trying to understand the transformer model from Attention is all you need, following the annotated transformer. The architecture looks like this: Everything is essentially clear, save for the ...
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182 views

What stops the network from learning the same weights in multi-head attention mechanism

I have been trying to understand the transformer network and specifically the multi-head attention bit. So, as I understand it that multiple attention weighted linear combination of the input features ...
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99 views

Attention based models for machine comprehension

Currently, I am understanding Attention models. I specifically need it to build a machine comprehension model (a model which can find answer to a question from a given comprehension). But I want to ...
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Meaning of different softmax notations in papers

I was wondering if the different notations of the softmax input mean different things especially about the size of the output. For example, in the paper Pointer Networks, it sometimes state the input ...
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2k views

What are attention mechanisms exactly?

Attention mechanisms have been used in various Deep Learning papers in the last few years. Ilya Sutskever, head of research at Open AI, has enthusiastically praised them: https://towardsdatascience....
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203 views

Attention methods

When using Attention, for example with LSTM (but not necessarily), one can use the following methods to attend: MLP: $ug(W^1v+W^2q)$ dot product: $v \cdot q$ biaffine transform: $v^TWq$ ($v$ is the ...