Yuanji's Blogs

True knowledge comes from practice.

Reinforcement Learning Tech Tree

This is a little tech tree I've made to understand the landscape of reinforcement learning.

1 min read · 2026

Semidefinite Programming Quick notes

a quick note of related math preliminaries on the semidefinite programming

4 min read · 2025

Normed Vector Space

a quick note from David Luenberger's book "Optimization by Vector Space Methods"

1 min read · 2025

Kalman Filter Recap

A recap of the Kalman Filter algorithm for state estimation. It also covers how it is related to the optimal state-feedback control problem.

9 min read · January 19, 2026

2026 · control math optimization
Reinforcement Learning Tech Tree

This is a little tech tree I've made to understand the landscape of reinforcement learning.

1 min read · January 12, 2026

2026 · ML AI reinforcement-learning
ROS 2 Essentials

How ROS 2 is different from ROS.

2 min read · November 23, 2025

2025 · robotics simulation programming
Mujoco

Some basic features of Mujoco.

3 min read · November 15, 2025

2025 · robotics simulation programming
A note on Diffusion Model (Credit Qingyuan Jiang)

A Study Note Adapted shared from Qingyuan Jiang's Work.

1 min read · November 11, 2025

2025 · AI ML