# Bobbie's Blog

## 不要计算

A computation is a temptation that should be resisted as long as possible.
- John P. Boyd (Michigan)

- John Wheeler

Six months in the lab can save you a day in the library.
- Albert Migliori

## Dimensional Analysis

Once one of my engineering friends asked me: “Why would you need all these dimensionless numbers? There are so many of them and they just complicate stuff!”

If something is not useful, it wouldn’t have been invented in science; this is particularly true for dimensional analysis which has made great success across all fields of science.

To put things simple, dimensional analysis has two major fundamental applications:

• Simplify equations and lead to new scientific branches/specialties.
• Guide scientific experiments with dynamic similitude.

## 写数学 Blog

• LaTeX 行间模式（displayed math）