Zafar Ali

9 Questions 31 Answers 0 Followers

Questions related from Zafar Ali

Tanh or ReLu, which activation function perform better in firing a neuron?

I would like to ask a question from Neural nets community, that there exist many activation functions such as Sigmoid, Tanh, ReLu etc., to fire a neuron. To insure non-linearity and better update...

03 October 2018 368 8 View

Can someone differentiate between Cosine, Adjusted cosine, and Pearson correlation similarity measuring techniques?

Different similarity measuring techniques have been used in finding similarity between user profiles. However, what is the difference between these techniques, in which circumstances we should use...

04 March 2017 8,199 4 View

Any special evaluation metrics for context aware recommender systems?

Hi everyone, If we want to evaluate the results generated by a context-aware recommender systems, which among the existing metrics would be suitable for this situation. Also, i would like to know...

03 June 2016 7,009 4 View

What are the different potential applications of context-aware recommender systems?

Recommendation systems are one of the information personalisation approach which is used to suggest relevant items and information according to user preferences and objective behaviors. As far as...

03 May 2016 5,847 6 View

Any idea about using Multi-Class SVM (Support Vector Machine) to classify large size PDF documents?

I want to classify PDF documents belong to various topics and field of study. As SVM (support vector machine) is a suitable approach to classify such kind of textual documents, can anybody provide...

13 April 2016 2,128 11 View

How collaborative filtering recommender systems generate predictions for those new items user has not yet rated?

Can anybody explain how collaborative filtering recommender systems make predictions for new items uisng Weighted sum method. Most of the research articles has provided formula but not explained...

20 February 2016 3,981 1 View

How can we calculate adjusted cosine similarity for two items represented by their ratings in a collaborative filtering recommender system?

I want to compute adjusted cosine similarity value in an item-based collaborative filtering system for two items represented by a and b respectively. these items are represented by two vectors...

18 February 2016 3,030 4 View

Which one is the best similarity calculation formula to use for finding similar users in Collaborative filtering recommendations?

I am working on a recommender system where i need to calculate similarity in ratings for user friends. which one out of cosine similarity and pearson correlation is better approach?

04 February 2016 4,488 1 View

How to use Naive Bayes Classifier for numerical data?

Is it possible to use naive byes algorithm for features represented by Term frequencies. i am classifying books on the bases of features these books have, for that, i am representing these...

09 January 2016 4,494 3 View