斯坦福自然语言处理公开课——“情感分析”原版课件.pdf

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Sentiment Analysis What is Sen+ment Analysis?

Dan Jurafsky Posi%ve or nega%ve movie review? •  unbelievably disappoin+ng •  Full of zany characters and richly applied sa+re, and some great plot twists this is the greatest screwball comedy ever ﬁlmed It was pathe+c. The worst part about it was the boxing scenes. •  •  2

Dan Jurafsky Google Product Search •  a 3

Dan Jurafsky Bing Shopping •  a 4

Dan Jurafsky Twi;er sen%ment versus Gallup Poll of Consumer Conﬁdence Brendan O'Connor, Ramnath Balasubramanyan, Bryan R. Routledge, and Noah A. Smith. 2010. From Tweets to Polls: Linking Text Sen+ment to Public Opinion Time Series. In ICWSM-‐2010

Dan Jurafsky Twi;er sen%ment: Johan Bollen, Huina Mao, Xiaojun Zeng. 2011. TwiXer mood predicts the stock market, Journal of Computa+onal Science 2:1, 1-‐8. 10.1016/j.jocs.2010.12.007. 6

Dan Jurafsky Bollen et al. (2011) •  CALM predicts DJIA 3 days later •  At least one current hedge fund uses this algorithm 7 s e n o J w o D M L A C

Dan Jurafsky Target Sen%ment on Twi;er •  TwiXer Sen+ment App •  Alec Go, Richa Bhayani, Lei Huang. 2009. TwiXer Sen+ment Classiﬁca+on using Distant Supervision 8

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斯坦福自然语言处理公开课——“情感分析”原版课件.pdf

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