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Aspect Based Sentimental analysis
Aspect Based Sentiment Analysis
DR. Asif Ekbal
Gaurav Kumar
National Institute of Technology, Patna Mentor :-
Summer Project
12/10/2012 Your footer here
Aspect Based Sentiments
Analysis?
12/04/2016 2
12/04/2016 3
Our
Objective
Extract
Aspect
Term
API to Extract
Aspect Term
A Working Example
12/10/2012 Your footer here
Sample InputVector
Labels for Input
Vector
RNN Model
Results
Example Continues
12/10/2012 Your footer here
Its BIO term we
get for some
testing data
Generated XML
for Validation
Annotator for SEMIEVAL -14
12/10/2012 Your footer here
What’s New ?
Use of RNN(Recurrent Neural Network)
BPTT(Back Propagation Through Time )
LSTM (Long Short Term Memory)
Stochastic Gradient Desecnt
Work Flow - 1
12/10/2012 Your footer here
Raw
Review
Annotation
Developed GUI
for Annotation
Generated
XML
Cohen’s Kappa
AgreementResults
66 %
Work Flow - 2
12/10/2012 Your footer here
Oh! Yes We got
the data we
need Algorithms
Machine Learning
Supervised Learning
Supervised
Unsupervised
Reinforcement
Classification
Problem
Regression
Problem
This is
what our
problem
requires
Final Work Flow
12/10/2012 Your footer here
• Classification Problem with fixed output Labels.
Annotated Text
Mathematical
Representation
Word2Vector
Deep Learning
Recurrent Neural
Network using DL4j
Results---Accuracy
BPTT
A bunch of
Program t o
bring data
in format
Developed API
To Extract Aspect
Term
Deep Learning4 Java Working
12/10/2012 Your footer here
• It is java Library to configure all types of Deep Learning Nets.
• It has built-in GPU support.
» MAP-REDUCE PROCESS
» These Steps are Repeated untill we get minimum error.
INPUT DATA
1 2 3 4 NN-1
Weighted and Bias are Averaged
1 2 3 4 NN -1
Step 1
Clusters
Step 2
Weights
are
Updated
Sample Code
This is how we I
am configuring
RNN
Fitting the
Three
Dimension
Input Vector
Training Starts
Here
Results of Aspect Based Analysis
Trained on 1/3
data got the
accuracy for
Testing data
This accuracy is
for Training data
Challenges to our approach
• Accuracy: Not 100 per cent
• A lot of Others terms: It means for extracting B-(beginning of
Aspect term), I-(Intermediate Aspect Term), O(others). There is lot
others terms. Even less than 1 percent belongs to B,I category and all
99 percent comes in O category.
• Need for lot of data: It seems like we required some more
features from data to be more accurate.
Work Done During Internship Period
◎Read the famous researchers and there Work.
◎Completed the Annotation of SEMIEVAL 14 about 5417 annotations.
◎Made GUI for Annotation of SEMIEVAL 14.
◎Completed the Annotation of SEMIEVAL 15-16 about 5417 annotations.
◎Program to Find N-grams
◎Read some basic concepts of Deep Learning and its applications.
◎Implemented Recurrent Neural Network In Deep Learning4j.
◎Implemented code to Extract Aspect Term in RNN in Java.
◎Developed a API and a GUI for exacting Aspect Term.
◎Some other Basic Programs like XML generation,Word2Vector and many more.
◎Self Implemented Works Are: -
◎Implemented Back propagation from Scratch in Java.
◎Implemented KNN, AutoEncoder etc in java.
◎Implemented to configure Neural Network using Feed Forward in Java from Scratch.
◎Implemented Linear Regression in Java from scratch.
Future Scope or Enhancement
◎We can provide more no of features in our data such as the
position of BIO terms as a feature.
◎We can use Recursive Tensor Neural Network which works
well for sentiments analysis and it is shown by Meta-Mind they
have developed App on Twitter Sentiments Analysis.
◎We need to extract some Outliers in our data.
◎We can use Bootstrap Re-sampling of our Data.
◎Any Suggestions Please Give !!!!!
Any Questions?

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Aspect Based Sentiment Analysis

  • 1. Aspect Based Sentimental analysis Aspect Based Sentiment Analysis DR. Asif Ekbal Gaurav Kumar National Institute of Technology, Patna Mentor :- Summer Project
  • 5. A Working Example 12/10/2012 Your footer here Sample InputVector Labels for Input Vector RNN Model Results
  • 6. Example Continues 12/10/2012 Your footer here Its BIO term we get for some testing data Generated XML for Validation
  • 7. Annotator for SEMIEVAL -14 12/10/2012 Your footer here
  • 8. What’s New ? Use of RNN(Recurrent Neural Network) BPTT(Back Propagation Through Time ) LSTM (Long Short Term Memory) Stochastic Gradient Desecnt
  • 9. Work Flow - 1 12/10/2012 Your footer here Raw Review Annotation Developed GUI for Annotation Generated XML Cohen’s Kappa AgreementResults 66 %
  • 10. Work Flow - 2 12/10/2012 Your footer here Oh! Yes We got the data we need Algorithms Machine Learning Supervised Learning Supervised Unsupervised Reinforcement Classification Problem Regression Problem This is what our problem requires
  • 11. Final Work Flow 12/10/2012 Your footer here • Classification Problem with fixed output Labels. Annotated Text Mathematical Representation Word2Vector Deep Learning Recurrent Neural Network using DL4j Results---Accuracy BPTT A bunch of Program t o bring data in format Developed API To Extract Aspect Term
  • 12. Deep Learning4 Java Working 12/10/2012 Your footer here • It is java Library to configure all types of Deep Learning Nets. • It has built-in GPU support. » MAP-REDUCE PROCESS » These Steps are Repeated untill we get minimum error. INPUT DATA 1 2 3 4 NN-1 Weighted and Bias are Averaged 1 2 3 4 NN -1 Step 1 Clusters Step 2 Weights are Updated
  • 13. Sample Code This is how we I am configuring RNN Fitting the Three Dimension Input Vector Training Starts Here
  • 14. Results of Aspect Based Analysis Trained on 1/3 data got the accuracy for Testing data This accuracy is for Training data
  • 15. Challenges to our approach • Accuracy: Not 100 per cent • A lot of Others terms: It means for extracting B-(beginning of Aspect term), I-(Intermediate Aspect Term), O(others). There is lot others terms. Even less than 1 percent belongs to B,I category and all 99 percent comes in O category. • Need for lot of data: It seems like we required some more features from data to be more accurate.
  • 16. Work Done During Internship Period ◎Read the famous researchers and there Work. ◎Completed the Annotation of SEMIEVAL 14 about 5417 annotations. ◎Made GUI for Annotation of SEMIEVAL 14. ◎Completed the Annotation of SEMIEVAL 15-16 about 5417 annotations. ◎Program to Find N-grams ◎Read some basic concepts of Deep Learning and its applications. ◎Implemented Recurrent Neural Network In Deep Learning4j. ◎Implemented code to Extract Aspect Term in RNN in Java. ◎Developed a API and a GUI for exacting Aspect Term. ◎Some other Basic Programs like XML generation,Word2Vector and many more. ◎Self Implemented Works Are: - ◎Implemented Back propagation from Scratch in Java. ◎Implemented KNN, AutoEncoder etc in java. ◎Implemented to configure Neural Network using Feed Forward in Java from Scratch. ◎Implemented Linear Regression in Java from scratch.
  • 17. Future Scope or Enhancement ◎We can provide more no of features in our data such as the position of BIO terms as a feature. ◎We can use Recursive Tensor Neural Network which works well for sentiments analysis and it is shown by Meta-Mind they have developed App on Twitter Sentiments Analysis. ◎We need to extract some Outliers in our data. ◎We can use Bootstrap Re-sampling of our Data. ◎Any Suggestions Please Give !!!!!