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| Paper: |
A Method for Exploiting Domain Information in Astrophysical Parameter Estimation |
| Volume: |
394, Astronomical Data Analysis Software and Systems (ADASS) XVII |
| Page: |
169 |
| Authors: |
Bailer-Jones, C.A.L. |
| Abstract: |
I outline a method for estimating astrophysical parameters (APs) from multidimensional data. It is a supervised method based on matching observed data (e.g. a spectrum) to a grid of pre-labelled templates. However, unlike standard machine learning methods such as ANNs, SVMs or k-nn, this algorithm explicitly uses domain information to better weight each data dimension in the estimation. Specifically, it uses the sensitivity of each measured variable to each AP to perform a local, iterative interpolation of the grid. It avoids both the non-uniqueness problem of global regression as well as the grid resolution limitation of nearest neighbours. |
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