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dongyu1990 wants to merge 5 commits intoqiyiping:masterfrom

dongyu1990:master

Commits on Apr 8, 2014

add files
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modified
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Commits on Apr 9, 2014

reconstruct of absolute gain
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add doc files 20140409 dongyu
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Commits on Apr 11, 2014

delete the unnecessory files dongyu 20140411
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