M ETA - PATH BASED M ULTI - N ETWORK C OLLECTIVE L INK P REDICTION Speaker: Jim-An Tsai Advisor: Jia-ling Koh Author: Jiawei Zhang, Philip S. Yu, Zhi-Hua.

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M ETA - PATH BASED M ULTI - N ETWORK C OLLECTIVE L INK P REDICTION Speaker: Jim-An Tsai Advisor: Jia-ling Koh Author: Jiawei Zhang, Philip S. Yu, Zhi-Hua Zhou Date: 2015/6/18 Source: KDD’14 1

O UTLINE Introduction Framework Experiment Conclusion 2

M OTIVATION 3

P URPOSE 4

O UTLINE Introduction Framework Experiment Conclusion 5

M ULTI - NETWORK LINK PREDICTION PROBLEM 1. lack of features 2. partial alignment 3. network difference problem 4. simultaneous link prediction in multiple networks 6

M ULTI - NETWORK L INK I DENTIFIER 7

P ART OF MLI 1. Social meta path based feature extraction and selection 2. PU link prediction 3. Multi-network link prediction framework 8

S OCIAL META PATH BASED FEATURE EXTRACTION AND SELECTION 1. Intra-Network Social Meta Path 2. Social Meta Path based Features 3. Anchor Meta Path 4. Inter-Network Social Meta Paths 5. Social Meta Path Selection 9

I NTRA -N ETWORK S OCIAL M ETA P ATH 10

I NTRA -N ETWORK S OCIAL M ETA P ATH 11

I NTRA -N ETWORK S OCIAL M ETA P ATH 12

I NTER -N ETWORK S OCIAL M ETA P ATHS 13

S OCIAL M ETA P ATH S ELECTION 14 X : a feature extracted based on a meta path in Y: the label

PU LINK PREDICTION 15

M ULTI - NETWORK LINK PREDICTION FRAMEWORK 16

O UTLINE Introduction Framework Experiment Conclusion 17

D ATASETS 18

R ESULTS 19

R ESULTS 20

O UTLINE Introduction Framework Experiment Conclusion 21

C ONCLUSION We have studied the multi-network link prediction problems across partially aligned networks. An effective general link prediction framework, MLI, has been proposed to solve the problem. MLI can work very well in predicting social links in multiple partially aligned networks simultaneously. 22

T HANKS F OR L ISTENING 23