TDSRC: A Task-Distributing System of Crowdsourcing Based on Social Relation Cognition

Table 1

Frequently used notations.

Notation	Description
	An ability
	A participant node
AS	Abilities set
ASS	Subset of AS
AV	Ability value
ACR	Abilities coverage rate
QF	Qualities factor
	The communication times in a sampling time between node and his friend for the ability (topic) .
HI	Ho nesty index
FAV	Friends’ abilities vector, the ability values of a friend in different task classification
FAM	Friends’ abilities matrix, the ability values of all friend in different task classification
	The FAV that node gives to his friend
	The communication times between and his friend for ability .