Scenario Learning

Overview

The Scenario Learning component uses a previously captured sensor observation seed dataset, as well as models of the underlying smart space and its deployed sensors to learn semantic events and people. Change point detection is first utilized to extract individual events from occupancy count measurements. This log of events is then leveraged to define individual people and the list of attended events. Agglomerative clustering techniques are applied to the learned sets of events and people to create metaevents and metapeople; these represent the types of events and profiles of people in the seed dataset. Time-series methods are additionally applied to the sensor observation dataset to derive metatrajectory models, which help dictate the manner in which people can move between spaces.

Configuration File

Config.txt is a configuration file used to run SmartSPEC in the scenario learning phase. It lists many learning parameters, as shown below:

[learners]
start       = DateStr
end         = DateStr
unit        = int
validity    = int
smooth      = str (one of "EMA", "SMA")
window      = int
time-thresh = int
occ-thresh  = int

[filepaths]
spaces     = Path
metaevents = Path
metapeople = Path
people     = Path
events     = Path
plots      = Path

In the learners section, start and end refer to the start and end dates (expressed as 'YYYY-MM-DD') for learning. unit denotes the number of minutes to group connection events. validity refers to the number of minutes for which the client will stay around the sensor. smooth and window are used to indicate the type of smoothening function to apply to the occupancy graphs; use smooth=SMA to apply a simple moving average and smooth=EMA to apply an exponential moving average. The time-thresh determines a minimum duration (minutes) required to realize an event. occ-thresh determines the minimum number of attendees required to realize an event.

The relative paths to files used as input / produced as output should be specified in the filepaths section. plots is a directory where plots of learned events will be saved.

Example:

[learners]
start       = 2017-04-01
end         = 2017-05-01
unit        = 5
validity    = 10
smooth      = EMA
window      = 10
time-thresh = 30
occ-thresh  = 1

[filepaths]
spaces     = data/demo/Spaces.json
metaevents = data/demo/MetaEvents.json
metapeople = data/demo/MetaPeople.json
people     = data/demo/People.json
events     = data/demo/Events.json
plots      = data/demo/plots

Input Seed Data

Please read the requirements for Scenario Learning mentioned here.

Running the Scenario Learning Component

Compile: None

Setup: Run conda activate smartspec in the Anaconda command prompt

Run: python main.py <config-filepath>