decision variable的用法和样例：
例句
- In a directed graph, the decision variables of the shortest path computation must be determined by a constraint that is called Kirchoff's constraint.
摘要已知一个有向图，求解两点间的最短路径的决策变量满足基尔霍夫约束关系。 - In this paper, we focus on bilevel programming problem with a common decision variable in the upper level and lower level programming.
摘要主要讨论上下层具有共同决策变量的一类二层规划问题的求解方法。
