Struggling with the second project of the Udacity course, image classification, it’s a key point to understand the process as a whole. Starting with:

1. What is a tensor?

First of all, consider everything in a graph mode.

Concept Review

• What does (relational) DB bring?
  • It’s actually a collection of info organized to afford efficient retrieval.
  • DBMS: software packages designed to store, access, manage DBs.
• In relational DB:
  • Every thing is table.
  • Under the basic structure, relational algebra is working, closure & optimize.
  • Always keep in mind of algebra optimization when querying.
    Read more »

Question1: How does ensemble of different tree-based models enhance the performance?

Question2: For important but also highly correlated features, how do they affect performance?

This is a personal tech blog. On the way of becoming a data scientist.

To properly use Markdown.

Welcome to Hexo! This is your very first post. Check documentation for more info. If you get any problems when using Hexo, you can find the answer in troubleshooting or you can ask me on GitHub.