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presentation_overview.txt
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Project Presentation Overview:
-----------------------------
1. Introduction:
- poisson point process examples + expl
-> malaria examples
- explain (/semi-derive) formula (1)
- illustrate importance of the rate function
-> different rate function sample plots
2. Problem:
- explain our setting: learn the intensity function with bayesian inference
- problem: doubly intractable integral (3)
- present different solution ideas?
-> MCMC approach, problems with it
- paper approach:
-> sparse GP prior
-> variational inference
3. Background:
- General Ideas behind the
- Sparse GP
-> (why? explain difference, problem with integration)
- Variational inference
-> derive general bound?
-> explain why the optimized dist approximates the posterior
4. Modell:
- lambda(x) = f(x)**2
- inducing points U, prior f|u ~GP
- location fix (grid), one could also optimize
- show kernel (only state it)
- show model formula (8)
- show parameters (\Omega) (only state which parts contain parameters?)
5. Lower Bound:
- introduce variational distribution(model depends only on p(u))
- derive variational lower bound
- explain why this approximates the posterior
- idea: max L => get q(u) => calc q(f)
-> then it would be possible to sample an f, square it and get a rate function
- decompose the formula, show depencencies and give intuitions why certain parts are tractable
- describe problem with the high res lookup table
-> what does this mean for the TF implementation
6. Evaluation:
- show loglikelihood plots
- what do we want to reproduce (goal)
- show kenya plot, hoping to reproduce sth similar
7. Concolusion + Discussion
----------------------------------------------------------------------------------------------------------
Todo:
- finish smapling plot and include it somewhere (thinning with real model)
Questions:
- why exactly helps the sparse formulation in the integration?
-> take a look at general gaussian prior + posterior
- VI: best solution for model class?