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What's New in 1.1.2
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New Features
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#. 增加燃耗区平均的核素核子密度编辑功能；
#. 增加Fdh、Fq、Fxy、AO等计算结果的编辑功能；
#. 支持相对流量水平的输入；
#. 支持负的临界硼浓度搜索；

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Bug Fixes
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#. feceee4: incorrect coolant perimeter and gaps
#. efa9eae: main_stru_set empty error
#. 1332b14: too many values to unpack
#. bb05693: index boundary exceeds
#. 307aaec: parallel GEOSIntersection is not thread safe
#. d10e756: vector empty error
#. 7c6f36e: set white for nan values
#. 2324b0a: two assembly may not has same geoemtry if one has empty cells
#. b2ee481: index error when accessing combine_coef
#. c3537ed: one residual calculation performed after 5 inner iterations for cmfd smoothing
#. df15f47: cell_fission_source forget to set 0 if it is not fissionable
#. b6424d6: 1.flux slope should be reversed in backward axial flux sweeping; 2.flux slope should be devide with mesh thickness
#. 9a412c6: method is_same_geometry should compare empty cells as well
#. ea95335: moc1d flux sweeping backward is not correct