Transcript ANSTO-MMSN_ws2_GumTree_Algorithms_Jiang_wa

Java DRA Algorithm Library
For Opal Neutron Scattering
Data Analysis Team
Jian Wang, Yang Fei, Paul Hathaway contribute to this library
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
Outline
Introduction
Data Reduction and analysis
Library Design for DRA
Global View of DRA Library
Class UML Diagram and Control
Summery
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
2
Introduction
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Provide data reduction capability and support for data analysis
tools to the users of the OPAL neutron beam instruments
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DRA library contains data reduction and analysis algorithm modules
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Provide graphic and non-graphic access interface
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Java is employed for working language. XML is used for
configuration
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DRA visualisation is developed depending upon openGL.
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Data analysis package will offer various functions based on user’s
inquiry
Image process on two dimensional graphic environment.
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
3
Experiment Review
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
DRA Requirements
Collected raw data should be corrected with detection
due to detector and electronics sensitivity,
efficiency
Background should also be removed from data sample,
Multiple scan data sample treatment in same experiment,
Geometry should be corrected for difference type of detector.
Mask process to reject bad regional data
Should be easily to process regular and generic mask shape.
Multiple masks can be applied in same data sample.
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Data integration in different 2theta region, also can be easily convert
between 2theta and Q neutron wavelets.
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Curve fitting can be applied to selected distribution function.
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
5
512 pixels in vertical
Detector and Data Sample
Horizontal with 128
corrected
Scattering pattern
geometry correction
Data sets stitching
128*nScan x 512
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
Algorithm Library design
Data Reduction Algorithm
Efficiency correction can be different with different detectors,
Backgrounds should be considered all possible sources,
Data set stitch is quite different for different instruments,
Geometry correction is applied for pixel by pixel correction depending upon
scattering theoretical prediction.
Data Analysis Algorithm
Multiple functions should be applied for curve fitting,
Various data region shape integrations are considered,
Wavelets Q and 2theta can be converted through graphic and non-graphic
Visualisation should be applied at the any stage of DRA.
Data integration with required region can be applied at the any stage
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
7
Active Algorithm Diagram
Data in
Meta para
Efficiency
Correction
BG subtraction
Math
Library
Stat
Library
Ctr para
Jian Gui WANG
Multi-Data sets
stitching
Geometry
correction
Vis
Library
Mask
process
Multiple
integrations
Library
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
Developing Status
We have developed (or developing) algorithm for 6 instruments.
• HRPD 12 algorithms have been full developed and tested
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Efficiency correction
Background subtraction (simplified)
Multiple data stitching
Geometry correction
Mask processor
Integration multiple functions
• Regular data region integration, such as horizontal, vertical, box shape, oval …
• Special data region integration, complex data region.
– Curve fitting
– Visualisation
• HIPD, RSD, TAS and SANS are full developed. HIPD and RSD are tested,
TAS and SANS need slightly modification and discussion.
• Reflectometer are partly developed, need to discuss new requirement.
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006
Summery
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With Java platform independent characteristic, Java algorithm library
can be applied to any platform.
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Library is designed module by module. It can be easily used.
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Graphic function is depend on openGL. This design offers good
functionality to process mask application and data visualisation.
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Fitting is designed to use though graphic and non-graphic access. This is
easy to use for any application
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Library modules can be full controlled by process manager input control
parameters.
Jian Gui WANG
Java Algorithm Library
Bragg Institute Meeting
Dec 14 2006