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Table 4.

The statistics of data sets.

ItemVolume
#blogs 1,000,000 
#record of posting 1,000,000 
#record of browsing 3,536,444 
#record of commenting 182,273 
#record of voting up 95,668 
#record of voting down 9,326 
#record of favorite 104,723 
#structure relationship 667,037 
#chatting relationship 46,572 
#users in training set 1,055 
#users in test set 1,055 
ItemVolume
#blogs 1,000,000 
#record of posting 1,000,000 
#record of browsing 3,536,444 
#record of commenting 182,273 
#record of voting up 95,668 
#record of voting down 9,326 
#record of favorite 104,723 
#structure relationship 667,037 
#chatting relationship 46,572 
#users in training set 1,055 
#users in test set 1,055 

Note: “Voting up” means users click a “like” button, while “voting-down” means users click a “dislike” button.

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