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Mei gao practicedemo_6
- 1. Problem: What & Where to eat? Mei Gao
- 3. Topic0 japanese Topic1 mexican Topic2 brunch Topic3 bar/atmosphere Topic4 pizza Topic 5 compliment sushi tacos breakfast great pizza great roll mexican coffee beer crust best pita salsa eggs happy hour wings love tuna burrito bacon bar thin good salmon chips pancakes drinks pepperoni like Topic6 indian Topic7 asian Topic8 fast food Topic9 sweets Topic10 bbq Topic 11 bad service indian thai burger bagels cheese service buffet pho fries cheese bbq didn’t masala chinese potato best sauce never naan soup onion rings smoothies chicken even bianco curry dog Iove ribs back LDA (Latent Dirichlet Allocation) 12 topics
- 4. Good restaurant: average star>3.5 Bad restaurant: average star<=3.5 Classification : Weight for each topic Classifier Linear SVM Logistic Regression Random Forest Accuracy in Cross Validation 73.67% 81.19% 77.7%
- 5. Very deep learning for image ranking Training
- 6. Validation Normalized Distance-based Performance Measure (NDPM) R_2 R_5 R_1 R_3 R_4 R_1 R_2 R_3 R_4 R_5 Recom Actual Ranking (ground truth) Minimize NDPM score Goal: Restaurant Recommendation Image Recommendation
- 7. Mei Gao
- 14. Deep hierarchical abstraction Learning structure of images Deep learning for image ranking
- 15. Assessment of LDA BOW (Bag of Words) LDA Feature Dimension 10000 words in dictionary 15 topics >99% dimension reduction Computation Efficiency 2.5 hrs 15 min >90% computation time (2000 samples) (10 fold cross validation)
- 16. Topic0 Topic1 Topic2 Topic3 Topic4 Japanese Mexican brunch Bar/ pizza Atmosphere sushi tacos breakfast great pizza roll mexican coffee beer crust pita salsa eggs happyhour wings tuna burrito bacon bar thin salmon chips pancakes drinks pepperoni Topic5 Topic6 Topic7 Topic8 Topic9 Indian Asian fastfood sweets bbq Indian Thai burger bagels cheese buffet Pho fries cheese bbq masala Chinese potato best sauce naan soup Onion ring smoothies chicken bianco curry dog Iove ribs LDA (Latent DiriChlet Allocation) 15 topics Topic 10: Compliment Great, best, live, good, like Topic 11: Service ( Bad) Service, didn’t, never, even, back
- 17. 3% 4% 10% 4% 5% 29% 20% 6% 3% 16% Percentage others Japanese Mexican Brunch bar Service compliment Asian fastfood bbq
- 18. Evaluation of Recommendation Error Using Normalized Distance-based Performance Measure (NDPM) R_2 R_5 R_1 R_3 R_4 R_1 R_2 R_3 R_4 R_5 Recom Actual Ranking (ground truth)
- 19. Evaluation of Recommendation Error Using Normalized Distance-based Performance Measure (NDPM) R_2 R_5 R_1 R_3 R_4 R_1 R_2 R_3 R_4 R_5 Recom Actual Ranking (ground truth) Minimize NDPM score Goal: