Read e-book online Activity Learning: Discovering, Recognizing, and Predicting PDF

By Diane J. Cook

ISBN-10: 111889376X

ISBN-13: 9781118893760

Defines the idea of an task version discovered from sensor facts and offers key algorithms that shape the middle of the field

Activity studying: studying, spotting and Predicting Human habit from Sensor Data presents an in-depth examine computational ways to task studying from sensor facts. each one bankruptcy is built to supply sensible, step by step info on how you can learn and technique sensor information. The publication discusses suggestions for job studying that come with the following:

  • Discovering job styles that emerge from behavior-based sensor data
  • Recognizing occurrences of predefined or came across actions in genuine time
  • Predicting the occurrences of activities

The thoughts lined should be utilized to various fields, together with defense, telecommunications, healthcare, shrewdpermanent grids, and residential automation. an internet significant other website permits readers to scan with the suggestions defined within the ebook, and to conform or improve the thoughts for his or her personal use.

With an emphasis on computational ways, Activity studying: gaining knowledge of, spotting, and Predicting Human habit from Sensor Data offers graduate scholars and researchers with an algorithmic point of view to task learning.

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Extra info for Activity Learning: Discovering, Recognizing, and Predicting Human Behavior from Sensor Data

Sample text

4 Spectral Features Many sensors used in activity monitoring are typically viewed as a signal, or a function of varying amplitude over time. The frequency spectrum provides an alternate view of the signal. This view shows how much of the signal lies within each given frequency band over a range of frequencies. A commonly used mathematical operator for transforming the time varying signal into its frequency spectra is the Fourier Transform, which is efficiently implemented using the Fast Fourier Transform (FFT).

10 provides the formula for calculating kurtosis. If the kurtosis is high then the distribution has a distinct peak near the mean and decline quickly with heavy tails. A normal distribution, for example, has a kurtosis of 3, while a uniform distribution has a kurtosis close to 0. In contrast, distributions with low kurtosis have a flat top near the mean. 14 that the data are not concentrated around the mean, but have a rather flat distribution. 48, which is consistent with this observation. 10) • Correlation.

In text mining, a document can be represented as a set of words that appear in the document together with the associated word frequencies in the document. ” We can use a bag-of-words approach for discrete, event-based sensors by assembling the list of sensors that fall into this category together with the number of times they generate messages in the current window. The number of messages they generate will vary according to the sensitivity of the sensor. For example, the motion sensors used in our Sweeping example are designed to generate an “ON” message when movement is detected corresponding to an individual weighing at least 40 pounds.

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Activity Learning: Discovering, Recognizing, and Predicting Human Behavior from Sensor Data by Diane J. Cook


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