Zekun Wang's Blog | Data Science

K-Means-Based Anomalous Email Detection in PySpark

Anomaly detection for emails based on MinHash and K-Means, implemented with PySpark and Colab

K-Means is known as a common unsupervised learning clustering method. But in fact, the K-Means algorithm can be applied to more scenarios. In this post, I will use a K-Means-based approach to compl...

Posted by Zekun on May 5, 2021

WearMask - Face Mask Detection Project Details

Low-cost solution for small businesses and public places

The paper has been published on arXiv. Background Last November, the COVID-19 epidemic in the United States reached a new peak. During Thanksgiving week alone, there were 1,147,489 new cases and ...

Posted by Zekun on December 1, 2020

Super-Fast In-Browser Face Mask Detection

Open the web page, and you have it!

facemask-detection.com 👈👈 This is an AI tool that detects masks super fast: No installation or registration. No need to buy expensive devices. You don’t even need a continuous internet conn...

Posted by Zekun on November 27, 2020

Tutorial for Compiling NCNN with WASM

The second step to deploying a deep learning model in the browser

The content of this tutorial is an extension of the Tutorial for compiling NCNN library. After we successfully compile the NCNN library normally, we can use its tools to convert our models into NC...

Posted by Zekun on November 15, 2020

Tutorial for Compiling the NCNN Library

The first step to deploying a deep learning model

This is a tutorial for compiling the NCNN library. The content comes from my attempts to complete the Mask-Detection project, so the process is based on the Yolo-Fastest model. I hope it will help ...

Posted by Zekun on November 10, 2020

Darknet to Keras - Model Transformation

New version based on TensorFlow 2.0

While working on the mask detection project recently, I tried to convert a Darknet model into a Keras model. In other words, I needed to convert the .cfg file and the .weights file into a .h5 file....

Posted by Zekun on October 25, 2020

How to Get Information from an IP Address?

Note - geoip2 module introduction

The process of getting IP address information is based on GeoIP2 Databases. I used the MaxMind GeoIP2 Python API for IP information queries. The GitHub page for the API is GeoIP2-python. You need ...

Posted by Zekun on July 20, 2020

COVID-19 Data Exploration (WIP)

Exploration and visualization of COVID-19-related data

Note: The content of this article is based on data collected by the project team of Professor Ziqi Chen, School of Mathematics and Statistics, Central South University (China). The data used for th...

Posted by Zekun on March 19, 2020

LAPOP Data Dashboard

A dashboard prototype built with Shiny R

This project is a data visualization dashboard designed to help non-professional users explore the Latin American Public Opinion Project (LAPOP). Due to copyright issues and confidentiality agreem...

Posted by Zekun on February 19, 2020

Cashbox Magazine Song Chart Analysis

A simple example of a data analysis pipeline

This article introduces the full picture of a data analysis pipeline by showing simple data import, feature engineering, and exploratory data analysis processes. The data used here is relatively ...

Posted by Zekun on February 15, 2020

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