Statistical Learning


How (not) to use Machine Learning for time series forecasting: Avoiding the pitfalls

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There are several types of models that can be used for time-series forecasting. It is popular for language recognition, time series analysis and much more. However, in my experience, simpler types of models actually provide just as accurate predictions in many cases. Due to their sequential nature, TDNN's are implemented as a feedforward neural network instead of a recurrent neural network. I usually define my neural network type of models using Keras, which is a high-level neural networks API, written in Python and capable of running on top of TensorFlow, CNTK, or Theano.


4 ML methods for prediction and personalization every data scientist should know - JAXenter

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Machine learning has long ceased to be futuristic hype and become ever more commonplace in the tech world. An array of companies are currently capitalizing on ML to quickly adapt to tectonic shifts in clients' expectations and craft more personalized offerings. Such a burning need for machine learning solutions leads to a high demand in adept data scientists. Not for nothing Glassdoor ranked this career #1 in their yearly list of 25 best jobs in the U.S. However, to outsmart rivals and become an odds-on favorite for leading positions in high-profile companies, you should be well-versed in advanced ML-powered techs.


Top 10 Most Popular AI Models - DZone AI

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While Artificial Intelligence and Machine Learning provide ample possibilities for businesses to improve their operations and maximize their revenues, there is no such thing as a "free lunch." The "no free lunch" problem is the AI/ML industry adaptation of the age-old "no one-size-fits-all" problem. The array of problems the businesses face is huge, and the variety of ML models used to solve these problems is quite wide, as some algorithms are better at dealing with certain types of problems than the others. We will explain the basic features and areas of application for all these algorithms below. However, we have to explain the basic principle of Machine Learning beforehand.


Predicting the Stock Market Using Machine Learning and Deep Learning

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There is not a huge difference in the RMSE value, but a plot for the predicted and actual values should provide a more clear understanding. The RMSE value is almost similar to the linear regression model and the plot shows the same pattern. Like linear regression, kNN also identified a drop in January 2018 since that has been the pattern for the past years. We can safely say that regression algorithms have not performed well on this dataset. Let's go ahead and look at some time series forecasting techniques to find out how they perform when faced with this stock prices prediction challenge. ARIMA is a very popular statistical method for time series forecasting. ARIMA models take into account the past values to predict the future values.


Machine Learning Hello World with Scikit Learn : Chapter 2 KNN K Nearest Neighbor Algorithm

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Hello World of Machine Learning is a video series to acquaint, enable and empower you to understand What, How and When of Machine Learning This is chapter - 2 of the series and in this chapter, we'll be exploring our first Machine Learning Algorithm called KNN (K Nearest Neighbor). This chapter will explain 1. What is KNN and how it works? Hope it helps you in learning something new.. enjoy! Please take a moment to Like! Subscribe!


Machine Learning in the Tidyverse

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This course will teach you to leverage the tools in the "tidyverse" to generate, explore, and evaluate machine learning models. Using a combination of tidyr and purrr packages, you will build a foundation for how to work with complex model objects in a "tidy" way. You will also learn how to leverage the broom package to explore your resulting models. You will then be introduced to the tools in the test-train-validate workflow, which will empower you evaluate the performance of both classification and regression models as well as provide the necessary information to optimize model performance via hyperparameter tuning.


C4W4L006 What is neural style transfer?

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Get YouTube without the ads. C4W4L006 What is neural style transfer? Want to watch this again later? Sign in to add this video to a playlist. Report Need to report the video?


Machine Learning Classification: A Dataset-based Pictorial

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The concept of classification in machine learning is concerned with building a model that separates data into distinct classes. This model is built by inputting a set of training data for which the classes are pre-labeled in order for the algorithm to learn from. The model is then used by inputting a different dataset for which the classes are withheld, allowing the model to predict their class membership based on what it has learned from the training set. Well-known classification schemes include decision trees and Support Vector Machines, among a whole host of others. As this type of algorithm requires explicit class labeling, classification is a form of supervised learning.


Using deep neural networks to hunt malicious TLS certificates

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A team of researchers at Cyxtera Technologies has recently proposed a neural network-based method for identifying malicious use of web certificates. Their approach, outlined in a paper published in ACM Digital Library, uses the content of transport layer security (TLS) certificates to identify legitimate certificates, as well as malicious patterns used by attackers. Encryption is an increasingly popular way of securing communications and exchanges of data online so that they cannot be intercepted and accessed by third parties. Despite its many advantages, encryption also allows cybercriminals to hide their messages and avoid detection when carrying out malware attacks. Moreover, encryption can give online users a false sense of security, as many web browsers display a green lock symbol when the connection to a website is encrypted, even when these websites are actually executing phishing attacks.


Time Series Forecasting with RNNs – Towards Data Science

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In some cases you may have input sequences that are too long and can cause the training to fail because of GPU memory issues or slow it down significantly. To deal with this issue, the model convolves the input sequence with a 1D convolution that has the same kernel size and stride before feeding it to the RNN encoder. This reduces the RNN input by a factor of n where n is the convolution kernel size. Context layer sits between the inputs encoder and a decoder layer. It concatenates encoder final state [S] with static features and static embeddings and produces a fixed size vector [C] which is then used as an initial state for the decoder.