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分类依据与纠错

AI 根据所提供的论文材料归类:摘要明确以行为历史估计动态决策结构模型,并围绕奖励参数和似然优化设计算法。

反馈分类问题

正在核对关联版本…

代码、数据与补充材料

正在核对对应版本的资源…

关注这篇论文的作者
Siliang Zeng
Mingyi Hong
Alfredo Garcia

高维状态空间中具有有限时间保证的马尔可夫决策过程结构估计

研究问题
如何利用行动与状态历史估计动态决策的结构模型,在高维状态空间中降低嵌套优化负担,同时保留对奖励参数的估计能力?
方法与思路
作者提出单循环算法,每次策略改进后进行似然最大化的随机梯度更新,并研究一般奖励形式及线性参数化奖励下的收敛性质。
材料陈述的贡献
摘要称算法有收敛到驻点的有限时间保证,线性奖励下可次线性逼近极大似然估计;机器人控制与迁移实验报告优于所比基准。
阅读关注点
应核对状态空间与奖励函数条件、驻点和极大似然解的区别,以及有限时间界、奖励估计误差和机器人实验比较的具体设置。
阅读边界
这是 arXiv 预印本,未核实同行评审或期刊接收。摘要未说明识别条件和界的具体形式,驻点收敛不能直接解释为全局最优保证。

原文摘要

We consider the task of estimating a structural model of dynamic decisions by a human agent based upon the observable history of implemented actions and visited states. This problem has an inherent nested structure: in the inner problem, an optimal policy for a given reward function is identified while in the outer problem, a measure of fit is maximized. Several approaches have been proposed to alleviate the computational burden of this nested-loop structure, but these methods still suffer from high complexity when the state space is either discrete with large cardinality or continuous in high dimensions. Other approaches in the inverse reinforcement learning (IRL) literature emphasize policy estimation at the expense of reduced reward estimation accuracy. In this paper we propose a single-loop estimation algorithm with finite time guarantees that is equipped to deal with high-dimensional state spaces without compromising reward estimation accuracy. In the proposed algorithm, each policy improvement step is followed by a stochastic gradient step for likelihood maximization. We show that the proposed algorithm converges to a stationary solution with a finite-time guarantee. Further, if the reward is parameterized linearly, we show that the algorithm approximates the maximum likelihood estimator sublinearly. Finally, by using robotics control problems in MuJoCo and their transfer settings, we show that the proposed algorithm achieves superior performance compared with other IRL and imitation learning benchmarks.

笔记与分组
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