variational

adj.

变化的，变化性的，变更的；

variational principle [力]变分原理（等于variation principle）

variational method变分法

variational inequality[数]变分不等式；[天]月行差

variational equation变分方程

variational problem变分问题

variational formulation变分公式化

1. In fact, tunnel fire is unsteady and variational because of throttling effect and buoyancy effect.
   实际上，在节流效应和浮力效应作用下，隧道火灾是动态变化的。
2. In order to restrain the influence of the variational intensity of the light, a threshold learning method was adopted.
   为了抑制光强变化的影响，采用了一种阈值学习方法。

On the variational principle
A Variational Level Set Approach to Multiphase Motion
Covex analysis and variational problems.
An Introduction to Variational Inequalities and their Applications
Finite-Dimensional Variational Inequalities and Complementarity Problems
Finite-Dimensional Variational Inequalities and Complementarity Problems | Springer
Using Dynamic Programming for Solving Variational Problems in Vision
A Family of Variable-Metric Methods Derived by Variational Means
Variational calculations of low-index crystal face-dependent surface energies and work functions of simple metals
Large displacement optical flow: descriptor matching in variational motion estimation.