Advances in Conceptual Modeling by Unknown

Author:Unknown
Language: eng
Format: epub
ISBN: 9783030341466
Publisher: Springer International Publishing

Relation Queries. Relation queries are used to ask for the observations made by some specific sensors when certain values hold in the observations made at the same timestamp by some other sensors. First, the user selects all the sensors that take part in the relation. Then they specify which are the sensors whose values they want to ask for, meaning that the remaining selected sensors are the ones whose values are fixed. The user indicates the fixed value for these sensors, which can be a numerical or boolean value (depending on the type of sensor), or the minimum, maximum or average value registered by the sensor in the specified time range. Once again, the form to create the queries is generated dynamically, based on the selected sensors and the information available about them in the ontology. Average answer times of 1.37 and 2.81 s were observed for a time-storage-window of one day and one week respectively.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.