Brag Meeting 26th April 2018

When: Thursday 26th April 2018, 13:00-14:00.

Location: GP-Y801.

Included in meeting: 

 

Hello Everyone,

The fortnightly BRAG meeting will be held tomorrow 26/04/18 at 1pm in room Y801. This week we will have presentations by Leah and Insha.

Leah’s Talk:

Title: A Brief Introduction to (Zero-Variance) Control Variates

Abstract:

A common objective in Bayesian inference is to estimate the expectation of a function with respect to the posterior. If approximate samples from the posterior are available then Monte Carlo integration can be used, with the quality of the estimator depending on the number of samples obtained. Control variates are a technique to lower the variance of the estimator without having to obtain additional samples. In this talk, I will explain the basics of control variates before going into more detail about a specific kind of control variates known as zero-variance control variates (ZV-CV). ZV-CV are applicable in applications where the derivatives of the log likelihood and log prior with respect to the parameters are available or can be unbiasedly estimated.

Insha’s Talk:

Title: Big data clustering

Abstract: I will be talking about some clustering methods (kmeans clustering and Dirichlet process Gaussian mixture models) I have found useful for clustering satellite images.

Kind regards,

Farzana and Trish

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

w

Connecting to %s