The preconditioner is generated from the target's "geometry structure " and not from the "matrix element", which assured the computational complexity for generating the preconditioner is only O(N) .
在构造预条件因子时，采用从目标的“几何结构剖分”出发，而不是从“矩阵元素”出发确定“基权函数之间的作用量关系”，这样保证了构造预条件矩阵的计算复杂度仅为O（N）。
The Ni(II) cation has a distorted octahedral geometry defined by five N atoms from two dimethylglyoxime molecules and two O atoms from two formate anions.
镍离子与两个丁二酮肟配体上的四个氮原子和两个甲酸根离子上的碳原子配位进而形成八面体配位环境。
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