the existence conditions of two and three crank in this configuration was analyzed. 分析了此机构构型双曲柄和三曲柄存在条件。
the species that fail to adjust to the changing conditions of existence will gradually become extinct. 不能适应生存环境改变的物种会逐渐灭绝。
the existence of positive solutions and approximate controllability of differential inclusions with nonlocal conditions 微分包含非局部问题正解的存在性及逼近能控性
the effect of uniaxial anisotropy and existence conditions of the spin waves in a symmetrical ferromagnetic bilayer film 双层对称薄膜中自旋波存在条件与各向异性
the conditions for the existence of interface spin waves in bilayers consisting of ferromagnetic and antiferromagnetic materials 铁磁和反铁磁材料双层薄膜界面自旋波的存在条件