Download Activity Learning: Discovering, Recognizing, and Predicting by Diane J. Cook PDF

By Diane J. Cook

Defines the concept of an job version discovered from sensor info and offers key algorithms that shape the center of the field

Activity studying: getting to know, spotting and Predicting Human habit from Sensor Data offers an in-depth examine computational methods to task studying from sensor information. every one bankruptcy is developed to supply useful, step by step info on easy methods to learn and technique sensor facts. The publication discusses thoughts for job studying that come with the following:

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

The strategies coated might be utilized to various fields, together with safeguard, telecommunications, healthcare, clever grids, and residential automation. a web better half web site permits readers to scan with the innovations defined within the ebook, and to conform or increase the thoughts for his or her personal use.

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

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

Sample text

Here we describe some sensors that are commonly used as wearable or carryable mechanisms for monitoring activities. Accelerometer An accelerometer is a common sensor that is worn or carried by an individual. 5). 6, this three-dimensional sensor measures acceleration along the x, y, and z axes. Acceleration is calculated as the change in velocity over time, or a = ΔV∕Δt. 5 20 40 60 100 Increased acceleration values can indicate a start or stop of a motion. 6 (right). 80 −X −Z +Z +X −Y A smart phone with a three-axis accelerometer (left) and a three-axis gyroscope carrying the device initiates a change in direction or velocity, which makes these sensors ideal for detecting different types of movement.

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. The amount of correlation that exists between multiple sensors or between the dimensions of a multidimensional sensor, such as a multiple-axis accelerometer, can provide important insights on the type of activity that is being monitored. For example, an accelerometer on a hand may see similar acceleration along all three dimensions if the individual is swimming, but may see little or no acceleration for one axis while the others axes do indicate acceleration for actions such as wiping a table surface.

2 12 770 Milliseconds Duration 46,230,739 16,712 Discrete Event Features In some settings, sensors report activity behavior as a well-defined event using a string-based message rather than a numeric value. Many of these sensors also report messages only when events are detected, rather than sampling the state of the sensor at near-constant time intervals. As an example, motion sensors may report a message of “ON” when movement is detected in their field of view, and report “OFF” when movement ceases to be detected.

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