刻画了在非负无零因子交换半环上强保持可逆矩阵的线性算子。
The linear operators that strongly preserve invertible matrices over some antinegative commutative semirings with no zero divisors were characterized.
采用傅里叶算子对人体轮廓实现平滑处理，消除局部噪声对最小负曲率点的影响。
Fourier filter is implemented to smooth the profile and reduce the local noise effects on NCM.
刻画了在非负无零因子交换半环上强保持可逆矩阵的线性算子。
Then T is an invertible linear operator preserving rank - partial ordering on Sn(F) if and only if there exists an invertible matrix (F) such that where .
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