Book Image

Codeless Time Series Analysis with KNIME

By : KNIME AG, Corey Weisinger, Maarit Widmann, Daniele Tonini
Book Image

Codeless Time Series Analysis with KNIME

By: KNIME AG, Corey Weisinger, Maarit Widmann, Daniele Tonini

Overview of this book

This book will take you on a practical journey, teaching you how to implement solutions for many use cases involving time series analysis techniques. This learning journey is organized in a crescendo of difficulty, starting from the easiest yet effective techniques applied to weather forecasting, then introducing ARIMA and its variations, moving on to machine learning for audio signal classification, training deep learning architectures to predict glucose levels and electrical energy demand, and ending with an approach to anomaly detection in IoT. There’s no time series analysis book without a solution for stock price predictions and you’ll find this use case at the end of the book, together with a few more demand prediction use cases that rely on the integration of KNIME Analytics Platform and other external tools. By the end of this time series book, you’ll have learned about popular time series analysis techniques and algorithms, KNIME Analytics Platform, its time series extension, and how to apply both to common use cases.
Table of Contents (20 chapters)
1
Part 1: Time Series Basics and KNIME Analytics Platform
7
Part 2: Building and Deploying a Forecasting Model
14
Part 3: Forecasting on Mixed Platforms

Introducing the problem of anomaly detection in predictive maintenance

Before we move on to the actual task of anomaly detection, we will explain the concept of an anomaly, discuss the challenges of anomaly detection, introduce IoT data for the application, and perform data preprocessing and exploration.

We’ll complete this introduction with the upcoming subsections:

  • Introducing the anomaly detection problem
  • IoT data preprocessing
  • Exploring anomalies visually

In the first subsection, we’ll explain what characterizes an anomaly and introduce the anomaly detection application.

Introducing the anomaly detection problem

Anomalies can be of two types, static and dynamic:

  • Static anomaly: This is a data signal that is different from its neighbors; for example, a sudden rotor breakdown due to a power outage.
  • Dynamic anomaly: This shows slowly changing patterns over time; for example, due to a deteriorating rotor, the mechanical pieces...