Questions tagged [artificial-intelligence]
Artificial Intelligence (AI) is a topic in computer science that deals with the study / creation of intelligent machines. Use this tag for on-topic questions that have an AI aspect.
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Which model to use for word tokenization?
What type of model for word tokenization in a group of words is good?? I want to tokenize skills in a group. There are multiple groups, and I want to predict group number using a single skill.
I have ...
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What type of Autoencoder is this? [closed]
I have an autoencoder structure which is given below. Now, I want to know what type of autoencoder is this? Is it Bayesian or Gaussian?? Or is it something else?
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Convolutional Neural Networks - Flattening with multiple feature maps
I have a very simple question about CNNs, which I unfortunately couldn't find an explanation for.
Imagine we have a CNN, that has four filters (eg right, left, top, bottom edges) each of those outputs ...
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Low MSE between the vectors but different distribution
I have two output tensors whose MSE is really small (0.04) but on checking the distribution of the tensors they are very different.
I am using:
torch.nn.MSE(output_tensor, input_tensor) = 0.04
I am ...
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Error in accuracy test [duplicate]
This is an update from my previous question.
I'll put my Model Development code here for your reference:
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How to address bias in AI Image Recognition Model: Oversampling, Undersampling, and Ensemble Techniques Not Working
I am currently working on an image recognition project using AI, but I am facing challenges with bias in my model's predictions. The model seems to be biased toward the majority classes in my dataset. ...
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How this is possible? Test loss is under train
I got this graph for my loss.
As you can see the distance between the two graphs is so much!
Can we say it shows bias is large and it's underfitting?
Is this thing that I just said true or isn't true?...
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Dataset for Swimming with Heartbeat and Motion Data [closed]
I am currently working on my final project CS degree that involves analyzing swimming data, specifically focusing on both heartbeat and motion data. I am looking for a dataset that includes these two ...
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Understanding bias-variance tradeoff decomposition
This is the formula :
$E[(Y−f^2)]=σ^2 +Bias^2[f^]+Var[f^]$
What i cant understand , the expectation is over the training Set for a fixed $x_0$ , thus the
$E(ϵ^2) =E(ϵ(x_0)^2) = ϵ(x_0)^2$ and not $...
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Should I fit(X_train, y_train) or fit(X,y) when using pipeline with gridsearchCV and cross_validate? (python)
I'm trying to make a pipeline that will do the following things: preprocessing, train one model (e.g. random forest), use GridSearchCV to tune hyperparameters (using nested cross validation to prevent ...
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Does a 1x1 convolutional Layer have a bias (Inception Modules)?
This question is regarding to the 1x1 convolutional layer idea from the paper
"Going Deeper with Convolutions"(https://arxiv.org/abs/1409.4842) that describe the idea of so called inception ...
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Machine learning and Artificial intelligence algorithms in identifying and classifying Airplane parts
Airplane parts and functions
Can Machine Learning and Artificial intelligence Algorithms assist in identifying and classifying Airplane images parts?
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Machine learning and Natural Language Processing Algorithms for Indian Surnames Homophones [closed]
Homophones
Indian Surnames List
English last names
Can machine learning, Natural Language Processing (NLP), Artificial intelligence assist in classifying , interpreting and specifying the differences ...
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Minimizing the expected loss (PRML)
In Bishop's PRML in section 1.5.2, the author introduces a loss function for classification, which is the expected loss,
$$
E[L]=\sum_k \sum_j \int_{R_j} L_{kj}p(\textbf{x},C_k)d\text{x}
$$
where Lkj ...
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Should the mean of NN's predicted values match the mean of the original values?
I built a neural network model in R using the Keras' package and for some reason, the mean of the predicted values of the neural network doesn't match the mean of the original values. For every other ...
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entries into machine learning, deep learning, artificial intelligence for social scientists
As far as CrossValidated allows users to ask for reference,
does anyone know (top-notch, authoritative) books, resources, or references about ML, DL, or AI for social scientists?
If there are still &...
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about training disease detection model
We are doing a study on disease detection in the field of health. For a better result. Should the model be trained only with the unhealthy data set or should the healthy data set also be given to the ...
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What is the roadmap to self-taught probability and statistics for artificial intelligence?
I am trying to self-teach probability and statistics for Machine Learning career. However I want to learn very well as doing research in AI is my goal.
Which books should I use to learn probability, ...
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Neural Networks - Can I Use Any Activation for the Output Layer?
I'm new to neural networks, and in almost everything I'm reading, the activation function recommended on the output layer follows a specific pattern:
If the network does binary classification (1 ...
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Identifying and refining AI problem stmt
I am looking for some guidance. My company is a electronic goods manufacturing company. We work with multiple distributors (around 7 distributors) across specific regions to sell our products. But ...
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Reinforcement learning needs dataset?
Sorry for this dummy question based on the number of contents in the field that I am asking about but
It seems that there are tons of texts and videos explaining what ...
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Can there be 3 initial weights for 2 inputs in a backpropagation network?
I am fairly new to machine learning and Neural Network. I was given a scenario where there is a 2-input single unit backpropagation Neural Network has 3 initial weights. The inputs are x and y. The ...
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Can I apply a confusion matrix to classification tasks outside of ML?
I would like to know if it's possible to use a confusion matrix to measure the performance of a classification tool outside the realm of ML or a statistical model.
For example, if I had a small script ...
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Tic tac toe AI, general questions
Tl;dr - Very new to AIs and neural networks, trying to make tic tac toe. Trying to use a genetic algorithm that plays against other AIs, and the looser leaves. They seem to never learn even to not ...
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If dropout is going to remove neurons, why are those neurons built?
I know that Dropout will remove neurons randomly to reduce over-fitting.
If Dropout is going to remove neurons, why are those neurons built? We could remove those neurons from the architecture.
Why ...
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Using AI for human like mouse movement between two points
I am trying to use Neural Networks or ML to make my mouse cursor move as humanly as possible, I want to be able to generate a set of points which are needed for the mouse to move from point A (...
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Are Deep Learning and GPUs changing the game? [closed]
"Essentially, all models are wrong, but some are useful."
--- Box, George E. P.; Norman R. Draper (1987). Empirical Model-Building and Response Surfaces, p. 424, Wiley. ISBN 0471810339.
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CT-Scan Classification Overfitting Problem
I am currently trying to train pretrained convolutional neural networks trained on the imagenet dataset to be able to classify ct-scans into two classes. Viral Pneumonia and Normal.
I am using K-fold ...
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Splitting medical dataset by patient
I am currently trying to train a CNN model to classify CT-scans.
I split the dataset using K-fold cross-validation and since the dataset I am using contains multiple slices per patient, I split the ...
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Which metric to use for language translation?
So I am using a pre-trained model to do the language translation
Eg:
Input = "Good morning"
Output = "Bonjour"
I would like to see if the ...
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Should I join train and validation sets for final NN model training? If yes, when to stop training the final model?
Normally we divide our dataset into 3 sets:
train set,
validation set,
test set.
We use train set to find optimal parameters (weights and biases of NN) and validation set to find optimal NN ...
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What is Max Pooling?
What is Max Pooling and why would I use it?
There are a lot of questions about Max Pooling on Stack Exchange, but none of them explain what it is, why we want to use it, the problem it solves, or ...
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The added value of Machine Learning compared to traditional rule based methods
I would like to showcase the value of machine learning compared to traditional rule based (symbolic AI) methods.
I would also like to break it down for Unsupervised, Supervised and Reinforcement ...
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Can a DQN learn when to avoid actions?
Imagine there is a problem with 3 possible outputs: A, B and C. But, only output ...
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What's the MAG of this underlying DAG?
I am studying causal discovery, with an interest on constraint-based algorithms like FCI (Fast Causal Inference).
I want to know what's the Maximal Ancestral Graph (MAG) of this underlying DAG (...
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What is the difference between K-Nearest Neighbor and Adaptive K-Nearest Neighbor algoritms?
While studying KNN, I have come to see "Adaptive K-Nearest Neighbor algorithm" and I understand KNN but I wonder how "Adaptive K-Nearest Neighbor" work. I tried to find some ...
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About "Flow Network based Generative Models for Non-Iterative Diverse Candidate Generation"？
I am reading the Yoshua Bengio et al, Flow Network based Generative Models for Non-Iterative Diverse Candidate Generation. After read this paper, I wonder how to establish a GFlowNet if I don't know ...
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Question about the "sample" in "Flow Network based Generative Models for Non-Iterative Diverse Candidate Generation"
I'm reading this paper recently. I'm confused about the "sample a distribution of trajectories" repeatedly mentioned in the article. I don't understand what this means. What is the sample ...
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Best grouping rows method with Multi-Armed Bandit
I have a dataframe , here above a sample :
...
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Time series forecasting: classical methods vs. machine learning / artificial intelligence [closed]
Do you know papers that researched how accurate predictions are using time series or AI? I see more papers using VAR/VECM than XGBoost. Do you guys know why this?
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Using Machine Learning to Create Periodic Paths
Question: How can I use Machine Learning to predict the right initial conditions $(P_0,V_0)$, given the angles of the triangular table, that will result in periodic paths in the triangular billiard ...
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Why applying Grad-CAM to the input layer is not common?
Grad-CAM is a popular tool that could be applied to the last convolutional layer to understand the inner structure of the deep neural network.
It is general to apply Grad-CAM onto the last ...
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Which is the correct ROC metric type to use for Imbalanced Dataset (macro,micro, weighted) for multiclass classification?
I am working on a classification task where I have more than 350 classes with HUGE data imbalance. I want to check my model performance but I am confused which metric to use. So I Googled some ...
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Objective functions of the flow network based generative model by Yoshua Bengio?
I am reading the Yoshua Bengio et al, Flow Network based Generative Models for Non-Iterative Diverse Candidate Generation. The objective function, Equation (11) and (12) are set for a given trajectory ...
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Rationale for the objective function in a flow network based generative model by Yoshua Bengio?
I am reading the Yoshua Bengio et al, Flow Network based Generative Models for Non-Iterative Diverse Candidate Generation. It seems to me the objective of the paper is to generate the flow $F$ given ...
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700,000 data points are true values while 1,300,000 data points are false values, is it an imbalanaced dataset? [closed]
I am trying to build a decision tree model and I have 700,000 true values while 1,300,000 data points are false values, in total, I have 2,000,000 data points including duplicates. I am wondering if ...
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Gradient descent - no way to find the global optimum if the model is stuck at local optima?
When I was learning about gradient descent a few minutes ago, I looked at the equation
This is supposed to find the slope of a point on the cost function J(θ0, θ0), and then go in the opposite ...
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Gradient descent - why the partial derivative?
I'm quite new to AI/ML, and I was learning about gradient descent. I saw this equation that explained the gradient descent algorithm:
I quite understood everything except the reason this equation ...
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Which machine learning or AI algorithm is best for this scenario?
I have a program which takes 3 inputs (a, b, c) and produces 2 outputs (x, y). The program is deterministic; if I give the same inputs, I'm guaranteed to get the same outputs.
My objective is find ...
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