Machine learning model for bot detection

[andreaschandra]

a given topic or hashtag, we want to see if the population of tweets more likely to flood by buzzer or user organic

or

given a buzzer account, we want to see the major topics to buzzing about

This task includes

• feature engineering (need to do text cleansing, preprocessing)

• baseline model

• early fine-tuning

• evaluation

• define feature set

[rubentea16]

Prepare Social Politics Word Dictionary (SPWD)

Propose Feature Set :

• username
• name
• is_name_social_political
• desc
• tweets
• n_tweet
• quoted_tweets
• hashtag
• n_tweet_use_hashtag
• ratio_tweets_use_hashtag
• n_photo
• n_video
• content_url

Feature Engineering :

• is_name_social_political (1/0) <- create model
• n_tweet
• hashtag
• n_tweet_use_hashtag
• ratio_tweet_use_hashtag
• n_photo
• n_video
• content_url

[andreaschandra]

@rubentea16 kalo beragam teknik tapi scorenya masih jelek, mungkin labelingnya kurang konsisten atau kurang banyak

[andreaschandra]

Baseline model result @rubentea16

BernouliNB
accuracy: 0.78 | precision: 0.60 | recall: 0.21 | f score: 0.32

Linear SVM
accuracy: 0.85 | precision: 0.74 | recall: 0.57 | f score: 0.64

Random Forest
accuracy: 0.82 | precision: 0.74 | recall: 0.43 | f score: 0.54

Gradient Boosting
accuracy: 0.84 | precision: 0.73 | recall: 0.55 | f score: 0.63

AdaBoost
accuracy: 0.81 | precision: 0.63 | recall: 0.58 | f score: 0.60

[rubentea16]

Baseline model result @rubentea16

BernouliNB
accuracy: 0.78 | precision: 0.60 | recall: 0.21 | f score: 0.32

Linear SVM
accuracy: 0.85 | precision: 0.74 | recall: 0.57 | f score: 0.64

Random Forest
accuracy: 0.82 | precision: 0.74 | recall: 0.43 | f score: 0.54

Gradient Boosting
accuracy: 0.84 | precision: 0.73 | recall: 0.55 | f score: 0.63

AdaBoost
accuracy: 0.81 | precision: 0.63 | recall: 0.58 | f score: 0.60

ini pake feature apa aja?

[andreaschandra]

@rubentea16 tweets aja, cek ini https://github.com/jakartaresearch/adi-buzzer/blob/dev/notebook/40_buzzer_classifier.ipynb

[rubentea16]

Performance Benchmark

Notes :

• multiple_feat = tweets, user_desc, is_name_social_political, ratio_tweets_use_hashtag, n_tweet, n_photo, n_video
• single_feat = tweets
• RFC = Random Forest Classifier(n_estimator=400)

Model	Desc	Features	Word Embedding	Accuracy	Precision	Recall	F1-score
RFC	-	multiple-feat	TF-IDF	0.84	0.75	0.33	0.45
RFC	-	single-feat	TF-IDF	0.84	0.72	0.35	0.47
SMOTE+RFC	Oversampling train data (Minor class)	multiple-feat	TF-IDF (desc = 3K dim & tweet = 50K dim)	0.86	0.66	0.62	0.64
SMOTE+RFC	Oversampling train data (Minor class)	single-feat	BPE (tweet = 300 dim)	0.86	0.68	0.57	0.62
SMOTE+SVC(default)	Oversampling train data (Minor class)	single-feat	BPE (tweet = 300 dim)	0.84	0.59	0.73	0.65
SMOTE+XGBoost(default)	Oversampling train data (Minor class)	single-feat	BPE (tweet = 300 dim)	0.86	0.66	0.62	0.64

[andreaschandra]

0.64

interesting

[andreaschandra]

Result after QA label

Algo	acc	pre	rec	fsc
Bernouli NB	accuracy: 0.78	precision: 0.75	recall: 0.21	f score: 0.33
SVM	accuracy: 0.85	precision: 0.75	recall: 0.60	f score: 0.67
Random Forest	accuracy: 0.81	precision: 0.77	recall: 0.34	f score: 0.47
Gradient Boosting	accuracy: 0.84	precision: 0.78	recall: 0.53	f score: 0.63
AdaBoost	accuracy: 0.82	precision: 0.67	recall: 0.56	f score: 0.61

[andreaschandra]

Algo	acc	pre	rec	fsc
Bernouli NB	accuracy: 0.82	precision: 0.54	recall: 0.69	f score: 0.61
SVM	accuracy: 0.87	precision: 0.69	recall: 0.65	f score: 0.67
RF	accuracy: 0.85	precision: 0.74	recall: 0.43	f score: 0.54
Gradient Boosting	accuracy: 0.87	precision: 0.72	recall: 0.54	f score: 0.62
AdaBoost	accuracy: 0.84	precision: 0.60	recall: 0.56	f score: 0.58