1) differential operator of the second kind
第二类微分算子
2) second gradient operator
第二类梯度算子
1.
Through the combination of the second gradient operator,the second category of integral theorems,the Gauss-curvature-based integral theorems and the Gauss(or spherical) mapping,a series of invariants or geometric conservation quantities under Gauss(or spherical) mapping were revealed.
将第二类梯度算子、第二类积分定理、Gauss曲率相关的积分定理和Gauss(球面)映射相结合,证明了一系列Gauss(球面)映射不变量。
3) Volterra integro-differential equations of the second kind
第二类Volterra积分微分方程
4) para second order differential operator
仿二阶微分算子
1.
This paper defines para second order differential operator and discusses the convexity criteria of function.
本文通过引入函数类上的仿二阶微分算子,研究函数凸性的判别,对文献[2]的一定理条件进行减弱。
5) second-difference operator
二阶微分算子
6) first kind of operator
第一类算子
1.
Processing method of first kind of operator for enhancing log resolving power;
提升测井曲线分辨率的第一类算子问题处理方法
补充资料：第二
1.复姓。见《通志．氏族四》。
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参考词条