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‎.gitattributes‎

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# Auto detect text files and perform LF normalization
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* text=auto
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# Custom for Visual Studio
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*.cs diff=csharp
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*.sln merge=union
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*.csproj merge=union
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*.vbproj merge=union
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*.fsproj merge=union
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*.dbproj merge=union
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# Standard to msysgit
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*.doc diff=astextplain
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*.DOC diff=astextplain
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*.docx diff=astextplain
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*.DOCX diff=astextplain
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*.dot diff=astextplain
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*.DOT diff=astextplain
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*.pdf diff=astextplain
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*.PDF diff=astextplain
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*.rtf diff=astextplain
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*.RTF diff=astextplain

‎.gitignore‎

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#################
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## Eclipse
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#################
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*.pydevproject
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.project
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.metadata
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bin/
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tmp/
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*.tmp
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*.bak
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*.swp
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*~.nib
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local.properties
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.classpath
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.settings/
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.loadpath
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# External tool builders
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.externalToolBuilders/
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# Locally stored "Eclipse launch configurations"
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*.launch
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# CDT-specific
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.cproject
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# PDT-specific
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.buildpath
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#################
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## Visual Studio
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#################
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## Ignore Visual Studio temporary files, build results, and
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## files generated by popular Visual Studio add-ons.
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# User-specific files
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*.suo
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*.user
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*.sln.docstates
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# Build results
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[Dd]ebug/
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[Rr]elease/
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x64/
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build/
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[Bb]in/
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[Oo]bj/
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# MSTest test Results
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[Tt]est[Rr]esult*/
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[Bb]uild[Ll]og.*
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*_i.c
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*_p.c
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*.ilk
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*.meta
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*.obj
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*.pch
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*.pdb
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*.pgc
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*.pgd
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*.rsp
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*.sbr
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*.tlb
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*.tli
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*.tlh
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*.tmp
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*.tmp_proj
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*.log
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*.vspscc
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*.vssscc
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.builds
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*.pidb
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*.log
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*.scc
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# Visual C++ cache files
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ipch/
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*.aps
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*.ncb
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*.opensdf
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*.sdf
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*.cachefile
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# Visual Studio profiler
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*.psess
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*.vsp
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*.vspx
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# Guidance Automation Toolkit
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*.gpState
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# ReSharper is a .NET coding add-in
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_ReSharper*/
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*.[Rr]e[Ss]harper
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# TeamCity is a build add-in
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_TeamCity*
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# DotCover is a Code Coverage Tool
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*.dotCover
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# NCrunch
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*.ncrunch*
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.*crunch*.local.xml
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# Installshield output folder
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[Ee]xpress/
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# DocProject is a documentation generator add-in
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DocProject/buildhelp/
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DocProject/Help/*.HxT
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DocProject/Help/*.HxC
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DocProject/Help/*.hhc
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DocProject/Help/*.hhk
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DocProject/Help/*.hhp
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DocProject/Help/Html2
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DocProject/Help/html
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# Click-Once directory
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publish/
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# Publish Web Output
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*.Publish.xml
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*.pubxml
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# NuGet Packages Directory
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## TODO: If you have NuGet Package Restore enabled, uncomment the next line
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#packages/
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# Windows Azure Build Output
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csx
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*.build.csdef
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# Windows Store app package directory
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AppPackages/
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# Others
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sql/
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*.Cache
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ClientBin/
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[Ss]tyle[Cc]op.*
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~$*
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*~
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*.dbmdl
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*.[Pp]ublish.xml
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*.pfx
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*.publishsettings
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# RIA/Silverlight projects
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Generated_Code/
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# Backup & report files from converting an old project file to a newer
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# Visual Studio version. Backup files are not needed, because we have git ;-)
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_UpgradeReport_Files/
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Backup*/
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UpgradeLog*.XML
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UpgradeLog*.htm
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# SQL Server files
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App_Data/*.mdf
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App_Data/*.ldf
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#############
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## Windows detritus
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#############
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# Windows image file caches
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Thumbs.db
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ehthumbs.db
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# Folder config file
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Desktop.ini
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# Recycle Bin used on file shares
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$RECYCLE.BIN/
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# Mac crap
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.DS_Store
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#############
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## Python
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#############
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*.py[co]
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# Packages
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*.egg
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*.egg-info
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dist/
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build/
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eggs/
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parts/
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var/
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sdist/
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develop-eggs/
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.installed.cfg
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# Installer logs
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pip-log.txt
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# Unit test / coverage reports
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.coverage
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.tox
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#Translations
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*.mo
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#Mr Developer
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.mr.developer.cfg

‎0-clean.bat‎

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@echo off
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cd /d %~dp0
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del /f /q ^
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*~ ^
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*.aux ^
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*.bak ^
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*.bbl ^
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*.blg ^
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*.dvi ^
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*.glo ^
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*.gls ^
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*.idx ^
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*.ilg ^
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*.ind ^
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*.ist ^
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*.log ^
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*.out ^
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*.ps ^
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*.thm ^
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*.toc ^
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*.lof ^
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*.lot ^
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*.loe ^
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*.bak ^
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*.sav ^
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data\*.aux ^
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data\*.bak ^
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*.synctex.gz

‎0-install.bat‎

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@echo off
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cd /d %~dp0
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@rem set the thesis name
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set thupkg=thuthesis
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@rem gen cls,cfg... files
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latex %thupkg%.ins
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@rem gen the package document
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xelatex %thupkg%.dtx
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xelatex %thupkg%.dtx
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makeindex -s gind.ist -o %thupkg%.ind %thupkg%.idx
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makeindex -s gglo.ist -o %thupkg%.gls %thupkg%.glo
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xelatex %thupkg%.dtx
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xelatex %thupkg%.dtx

‎0-make-thesis.bat‎

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@echo off
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cd /d %~dp0
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@rem set the thesis name
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set target=main
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xelatex %target%.tex
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bibtex %target%
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@rem del /f %target%.pdf
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xelatex %target%.tex
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xelatex -synctex=1 %target%.tex
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set status=1
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(tasklist|find "SumatraPDF"||set status=0) 2>nul 1>nul
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if %status%==0 (start "SumatraPDF" SumatraPDF.exe %target%.pdf)

‎0-shuji.bat‎

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@echo off
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cd /d %~dp0
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@rem set the thesis name
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set target=shuji
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xelatex %target%.tex

‎cabstract.txt‎

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SUNIST等离子体电子温度与密度的原子发射光谱诊断
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光谱诊断是等离子体诊断的主要手段之一，因此对于光谱诊断方法本身的研究也就具有重要的意义。本论文围绕SUNIST 球形托卡马克装置上光谱诊断的发展，开展了氦放电等离子体原子发射光谱诊断电子温度和密度的研究。在碰撞辐射模型发展上，本论文针对SUNIST参数范围的等离子体，对氦原子各能级的主要反应过程及杂质离子可能的影响进行了评估，列出了描述各能级粒子数反应速率的碰撞辐射模型方程；重点研究了原子反应速率系数不确定性至激发态粒子数密度计算误差的传递，从而可以在可接受的误差条件下确定模型中所需包含的激发态能级，在 SUNIST 参数范围下，包含至最高n = 7 壳层能级粒子时即给出可接受的结果；基于谱线强度比，进而为 SUNIST 建立了电子温度和密度的光谱诊断方法。在诊断系统建立和实验开展方面，通过论文工作，为 SUNIST 建立了光谱诊断系统，对系统进行了标定，实现了基于重复放电的原子发射谱线测量，给出了 SUNIST 上光谱诊断测量的电子温度和密度结果，通过与微波干涉仪等其他诊断结果的对比验证了谱线比法的可靠性。研究中还针对光谱诊断信号中的一些细节，如谱线比法得到的密度与微波干涉仪诊断得到密度的关系、谱线强度信号的涨落等，开展了初步的探索研究。
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本文研究中开展的创新性工作主要包括：
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1. 明确给出了原子反应速率系数不确定性至激发态粒子数密度计算误差的传递函数。利用此传递函数可以对反应速率系数精度提出具体要求，或在碰撞辐射模型中使用的速率系数精度确定后，估算出激发态粒子数密度的计算误差。这种方法比常规的对速率系数进行扰动并重新求解速率方程的方法简洁直观，且物理意义明确，对碰撞辐射模型的建立及评估具有指导意义。
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2. 发展了SUNIST 氦等离子体参数范围下利用谱线比同时获得电子温度与密度的诊断方法。以此为基础，在 SUNIST 装置上建立起光谱诊断系统，并在实验中给出了可信的诊断结果。此方法也适用于其他装置中具有类似参数范围的等离子体的诊断（如其他包括芯部在内的小型托卡马克装置等离子体或大型装置的边界及偏滤器等离子体等）。
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3. 论文观察到如谱线比法与微波干涉仪测量的弦平均电子密度的比例与电子密度峰化具有一定的关系、光谱信号与磁探针信号具有一致的涨落行为等趋势，为进一步丰富和深入光谱诊断研究提供了思路。
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The atomic emission spectroscopy is one of the key diagnostics for tokamak plasma research, and, therefore, to investigate the method of spectroscopy diagnostics is of great importance. The dissertation is devoted to develop a spectroscopy diagnostic method for determination of the electron temperature and density in helium plasmas and finally to establish an spectroscopy diagnostics system in the SUNIST spherical tokamak
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In the dissertation a collisional-radiative (CR) model is developed for helium plasmas within the parameter ranges of SUNIST helium discharging plasmas. The significance of reaction rates of the number densities of helium excited states is evaluated for collisions with electrons and heavy particles, then the equations of the collision-radiative atomic processes are established. Especially, the propagation of the uncertainties in the reaction rate coefficients of atomic processes is analyzed in details. Through the analysis, the maximum principle quantum number of the excited states in the CR model can be determined according to error in the model. For SUNIST helium plasmas, it is found that the CR model can give acceptable calculations when the maximum principle quantum number of included excited states equals 7. Finally a line-ratio method is established by selecting appropriate line emissions for the helium discharges of SUNIST.
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On the hardware, an atomic emission spectroscopy system is constructed. The line emissions of the plasmas are measured by a shot to shot method based on the repetition of the discharges. Then by employing the CR model we developed, the electron temperature and density are obtained by the method of spectroscopy diagnostics. The diagnostic results are confirmed to be trustable by comparing with those from other diagnostics, such as the microwave interferometry. In additional, some other preliminary results of measured line emission signals are found, such as the ratio of the measured electron density by the line-ratio method to that by the microwave interferometry is closely related with the spatial distribution of the plasma, and the intensities of line emissions have the same time-frequency fluctuation behaviors with those of the signals measured by the magnetic probes.
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Some highlighted works in this dissertation include:
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1. An error propagation function has been deduced for evaluation of the influences of the uncertainties of rate coefficients of the atomic processes on the calculated number densities of the excited states by the CR model. By using the error propagation function, one can raise a claim on the uncertainties of the atomic reaction rate coefficients directly, or, calculate the error of number densities of the excited states when the rates coefficients are given in the CR model. This method is simple but has a clear physics meaning compared to the traditional method, by which the CR mode is re-solved with perturbed rate coefficients. This error propagation function method developed in the dissertation is expected to play an important role in the building and the evaluation of the CR model.
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2. A line-ratio method is established for diagnosing the electron temperature and density of plasma. Based on the method, electron temperature and density are obtained in the helium plasma of SUNIST and the results have been confirmed to be trustable. This line-ratio method can provide reference for the diagnostics of plasmas those have the similar range of plasma parameters with SUNIST, such as core plasma in small tokamaks and edge/divertor plasma in large tokamaks.
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3. Some ideas for further research in the atomic emission spectroscopy field are proposed. The ratio of measured electron density by line-ratio method to that by microwave interferometry is closely related with the spatial distribution profile of the plasma. This fact will provide us a method to diagnose the density profile of the plasma. Another experimental observation is that the signals of line emissions have the same fluctuation behaviors with those measured by the magnetic probes, and it will provide us a possibility of investigating the MHD behaviors in plasmas by optical spectroscopy diagnostics.

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