... The fitting procedure will only converge to a unique solution if the components are linearly independent. ... The task calculates for each pair of component images and fails with an error if any is greater than 0.99. ... Hence components may be linearly independent in masked pixels yet still fail the test within the task. ... Finally, since the Poisson image values are necessarily all , negative values are not allowed in the model components. ...

Еще в разделе: (Показать все результаты (>31686) - xmm.vilspa.esa.es/ )

• Description

... A technique allowing automatic representation by a relatively small number of independent parameters based on the principal component analysis of data sequences is presented. ... In recent years the spectrum of observed astronomical data can be characterized as greatly varied. ... In this instance, the problem of initial description and classification of newly-observed data becomes most urgent, especially if there is a lack of preliminary observational material and theoretical expectations. ...

Еще в разделе: (Показать все результаты (>1994) - www.adass.org/ )

• Modelling Spectro-photometric Characteristics of Eclipsing Binaries
• Calculating the Position and Velocity Components of HST
• A Spectroscopy Exposure Time Calculator for IRAF

... Archives . ... The PCA and ICA is used for separating mixed components with some assumptions. ... The need of source separation methods in astronomy has led various adaptations of decomposition methods available. ... I rarely come up with a paper which gathered and summarized component separation methods applicable to astronomical data. In that regards, the following paper seems useful to overview methods of reducing dimensionality for astronomers. [arxiv:0805.0269] . ... Chandra Blog . ...

Еще в разделе: (Показать все результаты (>3488) - hea-www.harvard.edu/ )

• The AstroStat Slog 2009 September
• The AstroStat Slog component separation
• The AstroStat Slog ICA

... Classes . ... classes that define a functional representation of the sky brightness More... class . casa::ComponentList . A class for manipulating groups of components. More... class . ... Base class for component shapes. ... Base class for model components of the sky brightness. ... A model component of the sky brightness. ... Base class for spectral models. ... Internal ComponentModels_module classes and functions. classes that define a functional representation of the sky brightness . ...

Еще в разделе: (Показать все результаты (>10079) - www.atnf.csiro.au/ )

• casacore: SpectralComponents_module
• casacore: casa::EarthField Class Reference
• casacore: casa::ComponentType Class Reference

... Observers may find that they wish to perform parts of the pipeline reduction again on their data using these tasks. Typical examples will be to re-perform cosmic ray rejection, altering the input parameters or using data from separate datasets, or to perform one-dimensional spectral extraction on long-slit data or to modify the input parameters (e.g., aperture extraction box, or background region) when doing one-dimensional spectral extraction for echelle data. ... Rectify spectral images. ...

Еще в разделе: (Показать все результаты (>20241) - www.stsci.edu/ )

• Analysis of in B-Type Stars
• A Brief Description of the Instrument and Its Operation
• The HST Focal Plane and the GHRS Apertures

RSAA Home . GSAOI Home . ... Other Links . ... Control Software Links . Optics Links . Micro-Optics Links . ... Optical Materials Databases . ... Rockwell Science Center home page . ... Santa Barbara Research Center home page . ... CCD-World home page . ... SDSU home page . ... EPICS home page . ... Optics Society of America . SPIE - Society for Optical Engineering . ... ZEMAX software (Focus Software page) . OPTICAD software (Focus Software page) . ... RedHat home page . ...

Еще в разделе: (Показать все результаты (>1473) - www.mso.anu.edu.au/ )

• Software Maintenance Manual
• GSAOI Instrument Description Page
• GSAOI Dwarf Galaxies Science Page

... Among the objectives of Principal Components Analysis are the following. dimensionality reduction; љ . the determining of linear combinations of variables; љ . ... identification of groups of objects or of outliers. ... Finding a set of principal axes allows the objects to be adequately characterised on a smaller number of (artificial) variables. ... Reduction of dimensionality is practicable if the first new axes account for approximately 75 % or more of the variance. ...

Еще в разделе: (Показать все результаты (>2141) - www.sao.ru/ )

• A deep 38-MHz radio survey
• Multivariate Statistical Methods
• WSRT deep surveys

... Co-ordinate systems description . Directories structure . The file names' construction . The file set description . ... The orbital information for each month is presented in the separate directory. The INTERBALL orbital data are located on the STDA server, for each month in the separate subdirectory, which name consists from the year (YYYY) and month (MM) numbers. The Parent Directory of the Tail Probe orbital data is http://www.iki.rssi.ru/da/interball/tail/orbit/ . ...

Еще в разделе: (Показать все результаты (>1632) - www.cosmos.ru/ )

• STDA files
• PhSRM
• Space physics cordinate systems

... ASCOM FITS driver/ . 08-Sep-2007 12:16 . ... 24-Jan-2006 13:45 . ... 2.6K . ... Apache/2.2.14 (Ubuntu) Server at vega.inp.nsk.su Port 80 ...

Еще в разделе: (Показать все результаты (>102) - vega.inp.nsk.su/ )

• Index of /~inest/ASCOM/Scriptable Components and Engines/ASCOM FITS driver
• Index of /~inest/ASCOM/Updates to Platform Components
• Iowa Robotic Telescope Facilities

... OEM COMPONENTS . ... OEM OPTICAL COMPONENTS . ... Objective, Plan Achromatic, 4 X 0.12, BF . ... Objective, Flatfield Achromatic, 20 X 0.40, BF . ... Objective, Flatfield Achromatic, 60 X 1.00-0.70, Oil, Iris, BF . ... Objective, Flatfield Achromatic, 100 X 1.25, Oil, BF . ... Q-Plan™ Achromat Objective, 2.5 X 0.08, BF . ... Q-Plan™ Achromat Objective, 50 X 1.0-0.70, oil, iris, BF/DF . ... Q-Plan™ Achromat Objective, 100 X 1.25, oil, BF . ... Q-Plan™ Achromat Objective, 100 X 1.30, oil, iris, BF/DF ...

Еще в разделе: (Показать все результаты (>161) - www.lomoplc.com/ )

• OEM Optical Components
• Telescope Accessories

This diagram shows the six superimposed "layers" of the CSS table model. This diagram illustrates the algorithm for calculating a cell's final background. ... The diagram shows how, looking down on the six rectangles, one may compute the background color of each cell. ... A cell without a background color in the top layer is depicted as a "window" onto the lower layers, which give its final background color. ...

Еще в разделе: (Показать все результаты</