1) level set function
水平集函数
1.
Structural topology optimization is formulated in terms of the nodal variables on the level set function, which is converted to 0-1 variables by Heaviside function regularized by the sigmoid function.
利用有限元离散后的水平集函数的节点值作为拓扑设计变量来求解连续体拓扑优化问题。
2.
In this paper,we based on the advantage and disadvantage aspects of the traditional level set function and the distance preserving level set function,imported a image parameter function v(I) instead of a constant parmeter,and offered a new funtion that is an adaptive distancepreserving level set function.
水平集函数是在研究几何活动轮廓模型时将界面或者演化曲线看成高一维空间中某一函数ψ原型。
2) upper level set/ monotonicity
单调函数/上水平集
3) level function
水平函数
1.
we proposed a level function of a function at a point and studied its existence, presenting the result that set of level functions for continuous quasiconvex function at any point is nonempty.
证明拓扑向量空间上的连续拟凸函数在任何点处的水平函数集非空,得到水平函数的次微分与函数水平集的法向锥之关系,利用水平函数集给出函数存在最小值点的一个充分条件,刻画了某些水平函数的特征。
4) lateral displacement function
水平位移函数
1.
By selecting a kind of simplified model of underground diaphragm wall and introducing a reasonable lateral displacement function,an approximate method for calculating the lateral displacement of the diaphragm wall is deduced with the principle of minimum potential energy.
选取一地下连续墙的简化模型,引入合理的地下连续墙水平位移函数,运用最小势能原理导出了其水平位移的一种近似解法。
5) natural level functions
自然水平函数
1.
By using the so-called"natural level functions",we extend the well-known damped Newton method to solve ill-conditioned systems of nonlinear equations.
利用自然水平函数,将众所周知的阻尼牛顿法进行推广,用于求解病态非线性方程组。
6) absorb level function
吸收水平函数
补充资料：水平集
水平集
level set
水平集【l巴目就;冲咖二M肋撰c二l，函数f的 在R”中使f=常数的点集.若函数f为定义于平面R’中正方形Q上并有满足U声由七条件(LipschitZ condition)的偏导数，则对区间~f
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条