About: http://webisa.webdatacommons.org/228387607

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In addition, the extracted signal takes a rectified state, which makes no problem associated with whether the amplitude is positive or negative.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es