Improved Linear Algebra Methods for Redshift Computation from Limited Spectrum Data - II
| العنوان: | Improved Linear Algebra Methods for Redshift Computation from Limited Spectrum Data - II |
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| المؤلفون: | Srivastava, Ashok, Rinsky, Joel, Satyavolu, Chandrika, Foster, Leslie, Waagen, Alex, Aijaz, Nabella, Luis, Apolo, Gazis, Paul, Hurley, Michael, Way, Michael |
| المصدر: | CASI |
| سنة النشر: | 2008 |
| المجموعة: | NASA Technical Reports Server (NTRS) |
| مصطلحات موضوعية: | Man/System Technology and Life Support |
| جغرافية الموضوع: | Unclassified, Unlimited, Publicly available |
| الوصف: | Given photometric broadband measurements of a galaxy, Gaussian processes may be used with a training set to solve the regression problem of approximating the redshift of this galaxy. However, in practice solving the traditional Gaussian processes equation is too slow and requires too much memory. We employed several methods to avoid this difficulty using algebraic manipulation and low-rank approximation, and were able to quickly approximate the redshifts in our testing data within 17 percent of the known true values using limited computational resources. The accuracy of one method, the V Formulation, is comparable to the accuracy of the best methods currently used for this problem. |
| نوع الوثيقة: | other/unknown material |
| وصف الملف: | application/pdf |
| اللغة: | unknown |
| ردمك: | 978-2-00-800088-6 2-00-800088-5 |
| العلاقة: | Document ID: 20080008853; http://hdl.handle.net/2060/20080008853Test |
| الإتاحة: | http://hdl.handle.net/2060/20080008853Test |
| حقوق: | Copyright, Distribution as joint owner in the copyright |
| رقم الانضمام: | edsbas.516696F8 |
| قاعدة البيانات: | BASE |
| ردمك: | 9782008000886 2008000885 |
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