Performance of sampling algorithms (AIS, EPIS)

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Fiana
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Joined: Sun Feb 07, 2010 7:52 pm

Performance of sampling algorithms (AIS, EPIS)

Post by Fiana » Mon Feb 08, 2010 8:51 am

Hi!

I compared the performance of different inference algorithms.
The response time of the method "updateBelief" is timed after setting one evidence in a bayesnet.
In principle, evidence is set top down in my bayesnet.

The basic structure of a bayesnet is separeted in three levels. The bayesnet contains edges between nodes of these three levels. There are no edges between nodes in the same level.

For my application I use jSMILE.

In my analyses I found out that EPIS Sampling and AIS Sampling have a very bad performance in my bayesnet.
Although in a couple of papers these algorithms are described as one of the most performant sampling algorithms.


And now my question:
Do anybody know the reasons why EPIS Sampling and AIS Sampling have a bad performance in comparison to the other sampling algorithms?


Thanks in advance,
Fiana

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