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2018-sk-tnb-codechallenge's Introduction

Final result

1차 30/280

2차 10/30

최종결과

history

0. baselien model

기간동안 시청이력이 많은 순서로 50개의 영화를 동일하게 추천 mAP:14%

1. lstm model

시청이력 시퀀스를 입력으로 받아 이후 시청할 영화 1개를 예측 영화 예측확률로 argmax 50으로 50개의 영화 추천 mAP: 25% 10epoch: 25.7%

2. lstm continuous output model

lstm의 output을 onehot이 아닌 word2vec의 벡터를 예측하도록 한후 cosine most similiar 50으로 50개의 영화 추천 1epoch mAP: 19.2% 5epoch mAP: 19.4%

3. lstm model + add movie release month feature

기존 lstm model에 movie의 release month를 추가

other team

1st

bidirectional lstm, attention model, feature별로 rnn 따로 레이어를 만들어 concat
sigmoid, cross entropy
영화2vec
네이버 영화 데이터 크롤링

2nd

item2vec, handcraft feature => bidrectional lstm => 8000개 영화
item2vec만 30.8, handcraft feature 추가 31.9

3rd

seq2seq model 사용 -> 학습하는데 2시간
learning to rank -> 학습하는데 2분
loss 설게시 k/50 씩 더해서 했다고함
시청횟수 적은애들 제거함

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