Dynamic Group Recommendation Algorithm Based on Member Activity Level

Algorithm 2

DMA algorithm.

	Input: Group , Rating matrix , Number of latent factors , Candidate item set , Recommended time , Sliding time window length , Number of recommended items .
Output: Group recommendation list .
	Step 1: ←←timeSVD++;
	Step 2: ←;
	Step 3: For in :
	Step 4: ;
	Step 5: End For;
	Step 6: For in :
	Step 7: ;
	Step 8: End For;
	Step 9: sorted by descending order;
	Step 10: select highest items;
	Step 11: Return .