陕北靖边龙洲波浪式丹霞地貌发育在陕北黄土高原向沙漠高原的过渡地带,成景地层为白垩系洛河组,发育大型斜层理、交错层理的巨厚层......

对热轧宽带钢外观表面质量问题包括浪型、辊印、铬印、划伤、氧化铁皮压入等九类进行总结,并针对每一类问题分析其产生缺陷的原因,......

In this paper, Homotopy Analysis method with Genetic Algorithm is presented and used to obtain an analytical solution fo......