Blog - Amir Masoud Sefidian, Data Science, Machine Learning, Artificial Intelligence, Deep Learning, Data Analysis

2020-12-18

How to determine epsilon and MinPts parameters of DBSCAN clustering

9 mins read Every data mining task has the problem of parameters. Every parameter influences the algorithm in specific ways. DBSCAN (Density-Based Spatial […]

2020-11-24

A review of Deep learning based recommendation systems

20 mins read INTRODUCTION The number of research publications on deep learning-based recommendation systems has increased exponentially in the past recent years. In […]

2020-11-20

Steps to setup PyTorch with GPU for NVIDIA GTX 960m (Asus VivoBook n552vw) in Ubuntu

3 mins read In this post, I’m gonna describe the steps I used to utilize GPU for the PyTorch Deep Learning framework on […]

2020-11-09

Restricted Boltzmann Machines (RBMs) Simply Explained

16 mins read Table of Content: Definition & Structure Reconstructions Probability Distributions Code Sample: Stacked RBMS Parameters & k Continuous RBMs Next Steps […]

2020-11-05

A tutorial on the basics of Collaborative Filtering based Recommendations with Python implementation

29 mins read Collaborative Filtering is the most common technique used when it comes to building intelligent recommender systems that can learn to […]

2020-07-24

Image classification example with Gradio and Keras

12 mins read Image classification is a subset of machine learning that categorizes a group of images into labeled classes. We train an […]

2020-07-15

What is the Bias-Variance Trade-off?

9 mins read Whenever you are using a Statistical, Econometrical, or Machine Learning model, no matter how simple the model is, you should […]

2020-07-13

Common loss functions for training deep neural networks in PyTorch

17 mins read Neural networks can do a lot of different tasks. Whether it’s classifying data, like grouping pictures of animals into cats […]

2020-07-13

Illustrated calculation of cross-entropy for binary, multi-class, and multi-label classification

8 mins read Cross-entropy is a commonly used loss function for classification tasks. Let’s see why and where to use it. We’ll start with […]

2020-07-12

A complete tutorial on evaluation metrics for imbalanced classification

38 mins read A classifier is only as good as the metric used to evaluate it. If you choose the wrong metric to […]

2020-07-01

Exploratory Data Analysis (EDA) example: Road safety dataset case study

20 mins read Getting a good feeling about a new dataset is not always easy and takes time. However, a good and broad […]

2020-06-24

Pandas data selection using .loc and .iloc

8 mins read When it comes to select data on a DataFrame, Pandas loc and iloc are two top favorites. They are quick, fast, easy to read, […]

2020-06-01

Audio source separation (vocal remover) system based on Deep Learning

12 mins read Table of Contents: Introduction Source Separation Problem Source Separation Use Cases Deep Model Architecture Architecture Training Output Signal Reconstruction Sample […]

2020-05-31

Understanding hypothesis testing with Covid-19 case study (Z-test and t-test)

13 mins read Introduction The coronavirus pandemic has made a statistician out of us all. We are constantly checking the numbers, making our […]

2020-05-28

Difference between ETL and ELT

13 mins read On a high level, ETL transforms your data before loading, while ELT transforms data only after loading to your warehouse. In this post, […]