Unverified50% confidenceFactExact time
策略梯度定理证明梯度可表示为∇J(θ) = E[∇log π(a|s;θ) · Q^π(s,a)]，使用log-derivative trick将对概率分布的求导转化为对log概率的求导乘以采样值
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8/5/2026
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