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arXiv 2506.08024math.OC
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面向供应链网络的分布式异步原始-对偶优化

Distributed Asynchronous Primal-Dual Optimization for Supply-Chain Networks

Laksh Patel, Neel Shanbhag

AI总结:

针对不可靠通信和无界延迟下的分布式供应链流分配问题,提出全异步原始-对偶算法 DAPD-SCO,证明其 $O(K^{-1/2})$ 鞍点收敛速率,并在仿真中展现更低开销与更强鲁棒性。

摘要:

分布式供应链优化需要能够应对不可靠通信、无界消息延迟和地理分散智能体,同时仍能以可证明速率保证收敛的算法。在本文中,我们提出 DAPD-SCO(面向供应链网络的分布式异步原始-对偶优化),这是一种用于有向无环供应链图上网络流分配的全异步原始-对偶方案。每个边智能体通过投影梯度下降独立更新其本地流,每个零售商智能体通过投影梯度上升独立更新其对偶乘子,并且仅使用可能过时、延迟可呈次线性增长的信息。在标准凸性和 Slater 条件下,且无需任何全局同步或有界延迟假设,我们证明了几乎必然收敛到鞍点,并建立了 $O(K^{-1/2})$ 的遍历对偶间隙速率,与集中式下界相匹配。我们的分析采用基于 Lyapunov 的分解,隔离延迟引起的误差,并处理时变通信拓扑、有界噪声以及缓慢漂移的成本或容量参数。在真实三层网络上的大量仿真表明,DAPD-SCO 优于同步原始-对偶方法、Asynchronous Distributed Decision-Making(ADDM)和 gradient-push,实现了更快的收敛、更低的通信开销,以及在丢包和高陈旧度下的鲁棒性能。

英文摘要:

Distributed supply-chain optimization demands algorithms that can cope with unreliable communication, unbounded messaging delays, and geographically dispersed agents while still guaranteeing convergence with provable rates. In this work, we introduce DAPD-SCO (Distributed Asynchronous Primal-Dual Optimization for Supply-Chain Networks), a fully asynchronous primal-dual scheme for network flow allocation over directed acyclic supply-chain graphs. Each edge agent independently updates its local flow by projected gradient descent, and each retailer agent independently updates its dual multiplier by projected gradient ascent, using only potentially stale information whose delays can grow sublinearly. Under standard convexity and Slater's conditions and without any global synchronization or bounded-delay assumptions, we prove almost-sure convergence to a saddle point and establish an ergodic duality gap rate of $O(K^{-1/2})$, matching centralized lower bounds. Our analysis uses a Lyapunov-based decomposition that isolates delay-induced errors and handles time-varying communication topologies, bounded noise, and slowly drifting cost or capacity parameters. Extensive simulations on realistic three-tier networks show that DAPD-SCO outperforms synchronous primal-dual methods, Asynchronous Distributed Decision-Making (ADDM), and gradient-push, achieving faster convergence, lower communication overhead, and robust performance under packet loss and high staleness.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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