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Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch Team, Alibaba Group Boston, MA, USA Sep. 15, 2016
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Page 1: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

JobRecommendationwithHawkesProcess

W.Xiao,X.Xu,K.Liang,J.Mao,andJ.WangOneSearch Team,Alibaba Group

Boston,MA,USASep.15,2016

Page 2: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 3: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 4: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 5: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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• RecSys2015(Vienna)• TheSecondPlace

• KDD Cup2016 (San Francisco)• The Second Place(Phase1)

Boston• RecSys2016• TheFirstPlace

Wenming Xiao XiaoXu

KangLiang JunkangMao JunWang

Page 6: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 7: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 8: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 9: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 10: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 11: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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I B D B CD C DEB CØ :DMAA NE BA OPMA OACKMEAN( PNAM EOAI PNAM EOAI E OAM OEK

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7 days

14 days

21 days

28 days

3 days

2

1

Page 12: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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ratio:ui/u,ui/i

trend:iteminteractioncounts

similarity(interaction&profiling):u2u,i2i,u2i

poi:item,userinteraction

user&itemprofile:0/1 user/item/uiinteractionstatistics:(timewindow)0/1,count,distinctcount,days……

conditionalprobability:impressiontointeraction,interactiontointeraction

LowLevel

HighLevel

user: lastdayifclick/impitem: lastdayclickcountsuser-item: userclickcountsfortheiteminlastweek

itemimpressiontrenditemearliest andlastinteractiontime

……

Page 13: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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A B B C C B BØ ANE P H N CM EA OØ ,EBBAMA O HKNN BP OEK N BKM KKNOE CØ KE ORENA EMRENA IAODK

Page 14: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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TrainData

TrainModel

28 days 5 days

28 days 6 days

28 days 7 days

28 days 8 days

Stage 1

LR

XGBOOST

GBRT

GBDT

Pass

Reject

Stage 2

GBDT

GBDT

GBDT

……

Ensemble Top NOutput

Page 15: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 16: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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User-itemeventModel,Du,etal.2015

baselineintensity

temporaldependency

user-itemevent

Page 17: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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baselineintensitymatrix

selfexcitingmatrix

exponentialform

Page 18: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 19: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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Page 20: Job Recommendation with Hawkes Process2016.recsyschallenge.com/pdf/slides-xiao.pdf · Job Recommendation with Hawkes Process W. Xiao, X. Xu, K. Liang, J. Mao, and J. Wang OneSearch

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