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[期刊论文] 作者：LEI Jia-heng,CHEN Yong-Xi,GONG,
来源：武汉理工大学学报（材料科学版）英 年份：2004
λ-MnO2 was prepared by column method from normal spinel LiMn2 O4 with purity of 99.38%.The influence of LiMn2 O4 grain size and acidity of leaching solution on...
[期刊论文] 作者：Yong-Xi Gong,Yu Liu,Lun Wu,Yu-,
来源：计算机科学技术学报（英文版） 年份：2004
An algorithm for Boolean operations on conic polygons is proposed. Conic polygons are polygons consisting of conic segments or bounded conics with directions. P...
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