Blog

This is a collection of my learning notes. I find it helpful to write everything down to confirm my understanding, but they are mostly pedantic and boring. If you feel sleepless, feel free to read through them.

2026

Optimization Part 1 Basics and Least Squares

In common engineering problems, the optimization problem is to minimize the residual of a parametric model with respect ...

Optimization Part 1 Basics and Least Squares
Occupancy Grid Mapping

Besides state estimation or localization, which provide a robot with knowledge of where it is, it’s equally important fo...

Occupancy Grid Mapping
Lie Theory in Robot Motion

This note covers some of the fundamental concepts in Lie group and Lie algebra, and their applications to representing r...

Lie Theory in Robot Motion
Bayes Filtering and State Estimation

In robot state estimation, the Bayes filter is a probabilistic approach that estimates the state from a sequence of cont...

Bayes Filtering and State Estimation

2024

Acoustic Damping with a Helmholtz Resonator

Two fundamental equations in acoustics areContinuity EquationThe continuity equation states that the rate at which mass ...

Acoustic Damping with a Helmholtz Resonator

2023

Solving Basic PDEs

A partial differential equation (PDE) is a relation involving one or more functions of several variables, and their part...

Solving ODEs by Series

Now, we consider a somehow more general case, where we want to solve a linear second-order homogeneous equation with coe...

Elementary Complex Analysis

A function f:C→C is complex differentiable, or holomorphic, at z∈C iff′(z):=h→0,h∈Clim​hf(z+h)−f(z)​exists. The follow...

Laplace Transform and Inverse

The Laplace transform was first introduced by Pierre-Simon Laplace in his work on probability theory. The transform turn...

Laplace Transform and Inverse
Linear System of ODEs Theory

An important kind of equation to learn is those linear equations, which are those can be written in the form of Ly=bfor ...

Solving First and Second Order ODEs

First order ODE is equations that has the highest derivative of order one. It takes the formM(x,y)+N(x,y)y′=0​​The gener...