Paper List
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SpikGPT: A High-Accuracy and Interpretable Spiking Attention Framework for Single-Cell Annotation
This paper addresses the core challenge of robust single-cell annotation across heterogeneous datasets with batch effects and the critical need to ide...
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Unlocking hidden biomolecular conformational landscapes in diffusion models at inference time
This paper addresses the core challenge of efficiently and accurately sampling the conformational landscape of biomolecules from diffusion-based struc...
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Personalized optimization of pediatric HD-tDCS for dose consistency and target engagement
This paper addresses the critical limitation of one-size-fits-all HD-tDCS protocols in pediatric populations by developing a personalized optimization...
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Realistic Transition Paths for Large Biomolecular Systems: A Langevin Bridge Approach
This paper addresses the core challenge of generating physically realistic and computationally efficient transition paths between distinct protein con...
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Consistent Synthetic Sequences Unlock Structural Diversity in Fully Atomistic De Novo Protein Design
This paper addresses the core pain point of low sequence-structure alignment in existing synthetic datasets (e.g., AFDB), which severely limits the pe...
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MoRSAIK: Sequence Motif Reactor Simulation, Analysis and Inference Kit in Python
This work addresses the computational bottleneck in simulating prebiotic RNA reactor dynamics by developing a Python package that tracks sequence moti...
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On the Approximation of Phylogenetic Distance Functions by Artificial Neural Networks
This paper addresses the core challenge of developing computationally efficient and scalable neural network architectures that can learn accurate phyl...
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EcoCast: A Spatio-Temporal Model for Continual Biodiversity and Climate Risk Forecasting
This paper addresses the critical bottleneck in conservation: the lack of timely, high-resolution, near-term forecasts of species distribution shifts ...
用于快速适应的统一策略-价值分解
Computational Neuroscience Unit, Istituto Superiore di Sanità, Rome, Italy | Ospedale Santa Lucia, Rome, Italy | School of Computer Science, University of Sheffield, United Kingdom
30秒速读
IN SHORT: 通过双线性分解在策略和价值函数之间共享低维目标嵌入，实现对新颖任务的零样本适应。
核心创新
- Methodology Bilinear co-decomposition of actor and critic with shared multiplicative gating coefficients Gk(g)
- Methodology Zero-shot adaptation via single forward pass estimation of Gk(g) without gradient updates
- Biology Biologically inspired multiplicative gating mechanism analogous to gain modulation in cortical neurons
主要结论
- 单层双线性模型比标准双层MLP基线更快地获得更高奖励（图1B-C），通过乘法结构证明了学习效率的提高。
- 演员和评论家之间的共享G空间产生与单独门控相当的性能（图1D），同时减少了参数并实现了连贯的潜在控制接口。
- 对未见方向的零样本泛化显示性能下降有限（图2E），目标嵌入空间中的平滑插值支持新方向适应。
摘要: 复杂控制系统中的快速适应仍然是强化学习的一个核心挑战。我们引入了一个框架，其中策略和价值函数共享一个低维系数向量——目标嵌入——它捕获任务身份，并能够在无需重新训练表示的情况下立即适应新任务。在预训练期间，我们通过双线性演员-评论家分解共同学习结构化价值基和兼容策略基。评论家分解为Q(s,a,g)=∑kGk(g)yk(s,a)，其中Gk(g)是目标条件系数向量，yk(s,a)是学习的价值基函数。这种乘法门控——其中上下文信号缩放一组状态依赖的基——让人联想到在第5层锥体神经元中观察到的增益调制，其中自上而下的输入调节感觉驱动响应的增益而不改变其调谐[1]。基于后继特征，我们将分解扩展到演员，它由一组由相同系数Gk(g)加权的原始策略组成。在测试时，基被冻结，Gk(g)通过单次前向传播进行零样本估计，从而无需任何梯度更新即可立即适应新任务。我们在MuJoCo Ant环境中训练了一个软演员-评论家智能体，目标为多方向运动，要求智能体以八个指定为连续目标向量的方向行走。双线性结构允许每个策略头专门处理方向子集，而共享系数层在它们之间泛化，通过在目标嵌入空间中插值来适应新方向。我们的结果表明，共享的低维目标嵌入为高维控制中的快速、结构化适应提供了一种通用机制，并突显了复杂强化学习系统中高效迁移的潜在生物学合理原则。