Spatial Item Recommendation

237 Pages·2017·20.08 MB·English

CONTEXT-RICH
RECOMMENDATION: INTEGRATING
LINKS, TEXT, AND SPATIO-
TEMPORAL DIMENSIONS
Yizhou Sun (University of California, Los Angeles)
Xiang Ren (University of Southern California)
Hongzhi Yin (The University of Queensland,
Australia)
August 11, 2017
Outline
Part I: Introduction and Preliminaries
•
Part II: Recommendation in Heterogeneous
•
Information Networks
Part III: Recommendation in a Text-Rich Setting
•
Part IV: Recommendation with Spatio-Temporal
•
Information
Part V: Research Frontiers and Summary
•
1
Traditional View of Recommendation
Revolutionary
Avatar Aliens Titanic
Road
2
Recommendation Paradigm
feedback
user
user-item feedback
recommender system recommendation
product features
CCHooylnblatreibdno tMr-aBetaitvsheeo dFd isMlteertinhgods
EEE...ggg...,,, K(CB-oaNnlaetbeaanrneto-sBvt iaNcsCeeoidgm hCmbFo. (ArA C(nSMtao’rn w9o7ap,ro ZWuhlauWns,Wg I SS’0’I0G16I)R), ,’M 02a)trix
FEaxctetornriazla Ktinoonw (Hleud IgCeD MCF’0 (8M, Kao WreSnDIMEE’1E1-C)S’09),
Probabilistic Model (Hofmann SIGIR’03)
external knowledge
3
An Example of Traditional Method: Matrix
Factorization
: Rating Matrix : Estimated Rating Matrix
𝑅𝑅 𝑅𝑅�
4
Challenges
How to address the data sparsity and cold start
•
issues?
How to integrate content information, such as text,
•
into the recommendation?
How to do spatio-temporal recommendation?
•
5
Solution: A Heterogeneous Information Network
View of Recommendation
Revolutionary
Avatar Aliens Titanic
Road
James
Romance
Cameron
Zoe
Leonardo Kate
Adventure
Saldana
Dicaprio Winslet
6
What Are Information Networks?
• A network where each node represents an entity (e.g.,
user in a social network) and each link (e.g., friendship)
a relationship between entities.
Nodes/links may have attributes, labels, and weights.
•
Links may carry rich semantic information.
•
7
Heterogeneous Information Networks
Movie
Studio
Director
Actor
Venue Paper Author
Movie
DBLP Bibliographic Network The IMDb Movie Network The Facebook Network
1. Multiple entity types and link types
2. New problems are emerging in heterogeneous networks!
8
We are living in a connected world!
9