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How to Use Out-of-Fold Predictions in #MachineLearning

Machine learning algorithms are typically evaluated using resampling techniques such as k-fold cross-validation.

During the k-fold cross-validation process, predictions are made on test sets comprised of data not used to train the model. These predictions are referred to as out-of-fold predictions, a type of out-of-sample predictions.

Out-of-fold predictions play an important role in machine learning in both estimating the performance of a model when making predictions on new data in the future, so-called the generalization performance of the model, and in the development of ensemble models.

In this tutorial, you will discover a gentle introduction to out-of-fold predictions in machine learning.

After completing this tutorial, you will know:

*Out-of-fold predictions are a type of out-of-sample predictions made on data not used to train a model.
* Out-of-fold predictions are most commonly used to estimate the performance of a model when making predictions on unseen data.
*Out-of-fold predictions can be used to construct an ensemble model called a stacked generalization or stacking ensemble.

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#MachineLearning and the physical sciences

ABSTRACT
Machine learning (ML) encompasses a broad range of algorithms and modeling tools used for a vast array of data processing tasks, which has entered most scientific disciplines in recent years. This article reviews in a selective way the recent research on the interface between machine learning and the physical sciences. This includes conceptual developments in ML motivated by physical insights, applications of machine learning techniques to several domains in physics, and cross fertilization between the two fields. After giving a basic notion of machine learning methods and principles, examples are described of how statistical physics is used to understand methods in ML. This review then describes applications of ML methods in particle physics and cosmology, quantum many-body physics, quantum computing, and chemical and material physics. Research and development into novel computing architectures aimed at accelerating ML are also highlighted. Each of the sections describe recent successes as well as domain-specific methodology and challenges.

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#DeepSpeech 0.6: Mozilla’s #Speech_to_Text Engine Gets Fast, Lean, and Ubiquitous

The #MachineLearning team at #Mozilla continues work on DeepSpeech, an automatic speech recognition (ASR) engine which aims to make speech recognition technology and trained models openly available to developers. DeepSpeech is a deep learning-based ASR engine with a simple API. We also provide pre-trained English models.

Our latest release, version v0.6, offers the highest quality, most feature-packed model so far. In this overview, we’ll show how DeepSpeech can transform your applications by enabling client-side, low-latency, and privacy-preserving speech recognition capabilities.

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Tune #Hyperparameters for Classification #MachineLearning Algorithms

The seven classification algorithms we will look at are as follows:

Logistic Regression
Ridge Classifier
K-Nearest Neighbors (KNN)
Support Vector Machine (SVM)
Bagged Decision Trees (Bagging)
Random Forest
Stochastic Gradient Boosting

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Prediction of Physical Load Level by #MachineLearning Analysis of Heart Activity after Exercises

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