Questions tagged [sequence-modelling]

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Are there any well-known ways to fuzzy-cluster (variable length) sequences of trajectories?

I have this issue where I need to create 'soft' clusters for different trajectories. The data is sequences of integers where each integer means a specific point; so I have sequences like $s=(1,47,9)$ ...
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18 views

Continuous sequence data with Transformer model

What is the right way to input continuous, temporal(time series) data into Transformer network. Assume we're using the basic TransformerBlock here. Since data is continuous with no tokens, Token ...
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21 views

What is the difference between model setup, model configuration, and model customization?

In the context of research papers related to deep learning models, the authors usually mention these terms in the experiment section when they are talking about the model: configuration, setup. For ...
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24 views

Why and when transformers are better than CNN's in sequence modeling tasks?

Transformers have made a revolution in the domain of NLP and gave rise to a rapid boost of neural networks in a variety of language modelling problems, TTS and, recently, achieved competitive accuracy ...
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14 views

Seq2Seq Models not used for NLP - input to the Decoder?

I am looking into Seq2Seq models but using it to make multi-step predictions of factory data and I am getting a little confused with the inputs to the Decoder model. Correct me if I am wrong, but the ...
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11 views

MBART and better Domain Specific Translations Using Masks?

I'm implementing https://huggingface.co/facebook/mbart-large-50-many-to-many-mmt for translations as it has shown promising results but I wanted to see if there was a way to translate specific parts ...
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1answer
49 views

Can Reinforcement Learning be used to generate sequences?

Can we use reinforcement learning for sequence-to-sequence tasks? If yes, whether or not this is a good choice, how could this be done?
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20 views

Are there any successful applications of transformers of small size (<10k weights)?

In the problems of NLP and sequence modeling Transformer architectures based on self-attention mechanism https://arxiv.org/abs/1706.03762 have achieved impressive results and now are the first choices ...
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1answer
25 views

Normalization of possibly not fully representative data

I am trying to train a classification RNN model on a sequence of table medical data, but I stuck with the normalization problem. I realized that I cannot simply use MinMaxScaler, because of 3 problems:...
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24 views

Representing variable-length sequences

I want to train a model over a variable-length sequential data (e.g. the temperature at different times of day) where the output depends on what the temperature is at time ...
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99 views

How are temporal links made between following sequences in RNN?

Say I use an RNN, whatever is the cell's type, to perform time series classification. It can thus be seen as sequence classification. The time series is split into random, equal size, overlapping ...
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22 views

Building a resume recommendation for a job post?

There are few challenges I am facing when building a resume recommendation for a particular job positing. Let's say we convert the resume into a vector on n-dimensions and job description also as an n-...
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381 views

Can we use transformers for audio classification tasks?

Since transformers are good at processing sequential data, can we also use them for audio classification problems (same as RNNs)?
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63 views

Mining repeated subsequences in a given sequence

Given an alphabet $I=\left\{i_1,i_2,\dots,i_n\right\}$ and a sequence $S=[e_1,e_2,\dots,e_m]$, where items $e_j \in I$, I am interested in finding every single pattern (subsequence of $S$) that ...
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62 views

NLP Bible verse division problem: Whats the best model/method?

I'm working on a project compiling various versions of the Bible into a dataset. For the most part versions separate verses discreetly. In some versions, however, verses are combined. Instead of verse ...
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51 views

How to input a given sequence to a transformer (or an RNN) with probability of occurrence?

I'm experimenting with music and transformers, and I have sequences $S$ of shape: $(B,L,N)$ where $B$ is the batch size, $L$ is the sequence length, and $N=12$ are the number of musical notes with ...
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21 views

What's the difference between RNNs and Feed Forward Neural Networks if a fixed size vector can preserve sequential information?

I was watching a Youtube video in which the problem of trying to predict the last word in a sentence was posed. The sentence was "I took my cat for a" and the last word was "walk"....
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21 views

Why does the RNN-T beam search algorithm need to loop over the prefixes of y

I'm looking at the beam search psuedo code for the RNN-T decoder https://arxiv.org/pdf/1211.3711.pdf Why are lines 5-7 needed?
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34 views

Network design to learn multiple sequences of multiple categories

For learning a single sequence, LSTM only should suffice. However, my situation is different here. I have a list of sequences to learn: The sale volumes of 12 months, these are the sequences And ...
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1answer
154 views

Number of LSTM layers needed to learn a certain number of sequences

Theoretically, number of units for a LSTM layer is the number of hidden states or the max length of sequences as per my practice. For example, in Keras: ...
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1answer
41 views

Text classification of non-equal length texts, should I pad left or right?

Text classification of equal length texts works without padding, but in reality, practically, texts never have the same length. For example, spam filtering on blog article: ...
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1answer
63 views

Do transformers have success in other domains different than NLP?

Everybody knows how successful transformers have been in NLP. Is there known work on other domains (e.g that also have a sequential natural way of occurring, such as stock price prediction or other ...
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1answer
47 views

How do LSTM or GRU gates learn to specialize in their desired tasks?

While I was studying the equations for the computation inside GRU and LSTM units, I realized that although the different gates have different Weight matrices, their overall structure is the same. They ...
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1answer
213 views

How can I use machine learning to predict properties (such as the area) of simple polygons?

Imagine a set of simple (non-self-intersecting) polygons given by the coordinate pairs of their vertices $[(x_1, y_1), (x_2, y_2), \dots,(x_n, y_n)]$. The polygons in the set have a different number ...
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27 views

length independent sequence classification methods

I am looking to do sequence classification using deep learning. The length of my sequences can vary from a few hundred to several tens of thousands of characters. I was wondering what is a good ...
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1answer
113 views

How does the number of stacked LSTM layers or units in each layer affect the model complexity?

I playing around sequence modeling to forecast the weather using LSTM. How does the number of layers or units in each layer exactly affect the model complexity (in an LSTM)? For example, if I ...
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46 views

Model for supervised sequence classification task

The Problem I am currently working on a sequence classification problem I try to solve with machine learning. The target variable is the current state of a system. This target variable is following a ...
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22 views

What's the best method to predict/generate signal from one sensor (source) to signal from another another (target)?

I was wondering what is the best method out there to find relationship between two 1D signals so that I can predict/generate one (source) from the other (target). For example, let's say that in ...
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36 views

How to pad sequences during training for an encoder decoder model

I've got an encoder-decoder model for character level English language spelling correction, it is pretty basic stuff with a two LSTM encoder and another LSTM decoder. However, up until now, I have ...
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24 views

Generation of realistic real-valued sequences using Wasserstein GAN fails

My goal is to generate artificial sequences of real-valued data (e.g. time series) with GANs. Starting simple I tried to generate realistic sine-waves using a Wasserstein GAN. But even on this simple ...
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2answers
273 views

How to use LSTM to generate a paragraph

A LSTM model can be trained to generate text sequences by feeding the first word. After feeding the first word, the model will generate a sequence of words (a sentence). Feed the first word to get the ...
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40 views

Can sequence-to-sequence models be used to convert source code from one programming language to another?

Sequence-to-sequence models have achieved good performance in natural language translation. Could these models also be applied to convert source code written in one programming language to source code ...
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1answer
28 views

Can a character-level Seq2Seq setup learn to perfectly reconstruct structured data like name strings?

If not perfect, how well can they do? For example, if I give the Seq2Seq setup a name it did not see in the training process, can it output the same name without error? Example ...
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36 views

Sequence-to-Sequence models without specifying the start and end of sentences

Is there a seq-to-seq model which does not require to know the start and end of a sentence? I need to model a system which gets a long sequence of words and creates a long sequence of tokens as long ...
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2answers
590 views

What evaluation metric are used for sequence-to-sequence prediction problems?

I am solving many sequence-to-sequence prediction problems using RNN/LSTM. What type of evaluation metrics can be used for sequence prediction problems? One metric is the mean squared error (MSE) ...
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1answer
103 views

Why do small datasets require more samples, while big datasets require fewer samples in negative sampling?

In the deep learning specialization course by Andrew Ng, in the video Sequence Models (minute 4:13), he says that in negative sampling we have to choose a sample of words from the corpus to train ...
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200 views

Why is the transformer for time series forecasting faster than RNN?

I've been reading different papers which implements the Transformer for time series forecasting. Most of the them are claiming that the training time is significantly faster then using a normal RNN. ...
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34 views

Best approach for online Machine Translation with few hundred of samples?

I want to implement a model that improves itself with the passage of time. My main task is to build a machine translator (from English to Urdu).. The problem I am facing is that I have very little ...
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16 views

Make an LSTM model for each class separately

I have a dataset of some activities. The dataset contains the status of different sensors and the label of activity. T trained a model in Keras with the following architecture which models the ...
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1answer
912 views

Is “dataset size” and “model size” same thing?

I mean what is determine my model size, connection amount between layers and neurons, or size of my dataset?
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24 views

Literature on Sequence Regresssion

I have some rated time-sequential data and I would like to test if an ANN can learn a correlation between my measurements and ratings. I suspect I could just try a CNN where 1 Dimension is time or an ...
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22 views

Language Model from missing data

I want to learn how a set of operations (my vocabulary) are composed in a dataset of algorithms (corpus). The algorithms are a sequence of higher level operations which have varying low-level ...
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3answers
149 views

In sequence-to-sequence, why is the output of the decoder used as its input?

The basic seq-2-seq model consists of 2 parts: a recurrent encoder that compresses a sequence to a vector and decoder that unrolls the vector into the output sequence: Why is the output, ...
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1answer
88 views

Can HMM, MRF, or CRF be used to classify the state of a single observation, not the entire observation sequence?

I learn that the Viterbi algorithm used for Hidden Markov Model (HMM) can classify a sequence of hidden states from the corresponding observations; Markov Random Field (MRF) and Conditional Random ...
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1answer
56 views

Why feeding the correct output as input during training of seq2seq models?

So, I've read about seq2seq for time-series and it seemed really promising, but when I went to implement it, all the tutorial I've found use the correct output as input to the decoder phase during ...
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1answer
310 views

Why can we approximate the joint probability distribution using the output vector of an LSTM?

In the paper, Contextual String Embeddings for Sequence Labeling, the authors state that \begin{equation} P(x_{0:T}) = \prod_{t=0}^T P(x_t|x_{0:t-1}) \end{equation} They also state that, in the LSTM ...
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3answers
2k views

Can the decoder in a transformer model be parallelized like the encoder?

Can the decoder in a transformer model be parallelized like the encoder? As far as I understand, the encoder has all the tokens in the sequence to compute the self-attention scores. But for a decoder,...
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1answer
242 views

Convolutional Sequence to Sequence Learning: Training vs Generation

I am struggling to understand the use of the Convolutional Sequence to Sequence (Conv-Seq2Seq) model. The image below is take directly from the paper and is the nearly canonical diagram of the ...
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2answers
814 views

Why do we need both encoder and decoder in sequence to sequence prediction?

Why do we need both encoder and decoder in sequence to sequence prediction? We could just have a single RNN that, given input $x$, outputs some value $y(t)$ and hidden state $h(t)$. Next, given $h(t)$...
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1answer
2k views

Will attention based networks prevail over RNN and LSTM? [closed]

There is no point in picking one of the growing number of articles that come up in a web search for, "Deep learning attention networks," however the bold claims in Attention Is All You Need, Ashish ...