Sami Belkacem

8 Questions 16 Answers 0 Followers

Questions related from Sami Belkacem

Can we duplicate data to assess the speed performance of supervised learning algorithms?

Let's suppose we want to compare for a given problem several supervised learning algorithms, in terms of accuracy and speed. If we don't have a lot of data, is it acceptable to duplicate...

27 December 2019 5,786 5 View

Find the best parameters using the Grid search and the Hold-out validation in case of chronologically ordered data?

Hi everyone, In machine learning, in the case of chronologically ordered data, is it possible to find the best parameters of an algorithm using the Grid search and the Hold-out validation instead...

21 November 2018 9,901 4 View

Hold-out validation or K-fold cross-validation in case of chronological ordered instances?

Hi everyone, In machine learning, suppose we have a training database consisting of chronological ordered instances, from least recent to most recent, e.g. a user's behavior on social...

20 November 2018 6,891 3 View

In case of balanced classes, what is the best metric to evaluate a supervised binary classifier?

Hello everyone, In case of balanced classes, what is the best metric to evaluate a supervised binary classifier that predicts if a tweet will be relevant or not to a user: MCC (Matthews...

02 October 2017 6,886 12 View

How to evaluate a system that infers interests of Twitter users without asking them to do it manually?

Hello everyone, On Twitter, given a system that infers interests of English-speaking users from tweets they posted or with which they interacted, is there any method to evaluate the system's...

29 June 2017 3,688 4 View

What are the best methods/tools to extract keywords from a tweet?

Hello everyone, What are the best methods/tools to extract keywords from a tweet? Removal of stop words, word stemming and word frequency seem to be insufficient. According to previous research,...

24 May 2017 9,642 7 View

What is the best and easiest way to extract a user's interests from tweets he/she posted or consumed?

Hello everyone, On Twitter, I'm well aware that topic modeling and TF*IDF methods can be used to extract a user's interests from tweets he/she posted or consumed. However, what is the best and...

15 May 2017 7,075 5 View

What are the datasets available for news feeds on social media?

I'm looking for social news feed datasets that include: news feed posts, users' interactions with these posts, users' profiles, social connections between users, etc.

27 March 2016 4,625 7 View