March 14 (or 3/14) is Pi Day. During this somewhat whimsical holiday, science nerds around the globe eat pies and perform needlessly complicated operations to celebrate the fact that the ratio between a circle’s circumference and diameter is 3.14152653… It may be a little confusing from the outside, but that’s sort of the point. 522 more words

## Tags » Gaussian

#### Matrices

**Gaussian Elimination (Row Reduction)**

Gaussian elimination is an algorithm for solving systems of linear equation. It is avaible when the number of equations equals or more than the number of unknowns. 274 more words

#### Setting up Gaussian09 on Ubuntu

This has worked without issues on Ubuntu 15.04 and above to install the Gaussian 09 binaries.

- Copy all Gaussian files to a folder under the home folder, for example… 243 more words

#### Confidence Interval of Normal Distribution

Ref: https://www.quora.com/What-is-the-difference-between-99-and-95-confidence-interval

Confidence intervals are a little bit tricky in a sense that people don’t define what they really mean by confidence interval.

Now let me tell you a scenario using which you can start understanding CIs on a very basic level. 611 more words

#### Introduction XI - Distributions and what they model

A lot of random variables follow a known distribution. It is therefore good to know some of the most common distributions and what they model. Remembering their PMFs or PDFs is not necessary. 382 more words

#### [BayesOpt 2] Gaussian Process for Regression

Gaussians and Gaussian Process

Gaussian Process for Regression

Bayesian Optimization – intuition (and some theory)

*Bài này nằm trong Draft hơi lâu rồi, nên hôm nay publish luôn, mặc dù còn vài ý chưa viết hết.*

#### Partial optimization in Gaussian09

There are several ways to do partial optimization (freeze coordinates) in Gaussian.

- One of them is to add “
**ModRedundant**” to**Opt**or**Geom…** 149 more words