论文标题
与组成约束的随机组成优化
Stochastic Compositional Optimization with Compositional Constraints
论文作者
论文摘要
随机组成优化(SCO)引起了人们的关注,因为它在重要的现实问题上的广泛适用性。但是,现有在SCO上的工作假设解决方案更新中的投影很简单,对于以期望形式的约束(例如经验性的条件危险价值约束)的问题实例无法保留。我们研究了一个新型模型,该模型将单层期望值和两级组成约束结合到当前的SCO框架中。我们的模型可以广泛应用于数据驱动的优化和风险管理,包括规避风险的优化和高音阶组合选择,并可以处理多个约束。我们进一步提出了一类原始双算法,该算法以$ \ co(\ frac {1} {\ sqrt {n}} $在单级期望值和两级组成约束下,以$ n $ n is it it it it the Expecter conth in Beench cacks cacks cacks cacks cacks cacks cacks cacks cacks cacks condecor cacks coco,以$ \ co(\ frac {1} {\ sqrt {n}} $生成最佳解决方案的收敛序列(\ frac {1} {\ sqrt {n}})$。
Stochastic compositional optimization (SCO) has attracted considerable attention because of its broad applicability to important real-world problems. However, existing works on SCO assume that the projection within a solution update is simple, which fails to hold for problem instances where the constraints are in the form of expectations, such as empirical conditional value-at-risk constraints. We study a novel model that incorporates single-level expected value and two-level compositional constraints into the current SCO framework. Our model can be applied widely to data-driven optimization and risk management, including risk-averse optimization and high-moment portfolio selection, and can handle multiple constraints. We further propose a class of primal-dual algorithms that generates sequences converging to the optimal solution at the rate of $\cO(\frac{1}{\sqrt{N}})$under both single-level expected value and two-level compositional constraints, where $N$ is the iteration counter, establishing the benchmarks in expected value constrained SCO.