用大规模参数优化让生物神经网络学会嗅觉导航,性能超传统硅基模型。
Embodied Neurocomputation: A Framework for Interfacing Biological Neural Cultures with Scaled Task-Driven Validation

- 构建系统级框架,优化生物神经网络与硅芯片间的编码解码机制。
- 测试1300种参数组合,4000小时交互后找到12个高效学习配置。
- 成果为生物-硅混合计算提供可复现基准,适合神经工程与类脑计算研究者。
生物神经网络(BNNs)具有极高的能效和数据效率,具备独特的学习机制。然而,其在神经计算中的核心挑战在于如何最优地实现传统硅基接口与活体生物学之间的编码/解码映射。本文提出“具身神经计算”框架,以系统级方法应对这一多变量优化问题。通过首次大规模参数优化,评估了在模拟网格世界中执行闭合回路嗅觉梯度导航任务的BNN代理的编码配置。尽管任务相对简单,但生物相互作用导致了巨大的多组合搜索空间。在约1,300种参数组合、超过4,000小时真实时间的代理-环境交互中,识别出12种在多轮实验中持续表现出学习能力的配置。这些配置在相同交互预算下,任务表现显著优于优化后的硅基DQN代理。该研究标志着向使用BNN实现稳健、可扩展的目标导向学习迈出的第一步。框架为任务驱动神经计算提供了基础,并支持建立领域内通用基准。长远来看,该工作将推动高效、自适应、实时计算的生物-硅混合架构发展,包括潜在的机器人控制应用。
原文摘要 · Abstract (English)
Biological neural networks (BNNs) have been established as a powerful and adaptive substrate that offer the potential for incredibly energy and data efficient information processing with distinct learning mechanisms. Yet a core challenge to utilizing BNN for neurocomputation is determining the optimal encoding and decoding mechanisms between the traditional silicon computing interface and the living biology. Here, we propose an Embodied Neurocomputation framework as a systems-level approach to this multi-variable optimization encoding/decoding problem. We operationalize this approach through the first large-scale parameter optimization of encoding configurations for a BNN agent performing closed-loop navigation along an odor-style gradient in a simulated grid-world. Despite the relative simplicity of the task, the biological interactions gave rise to a massive multi-combinatorial search space for optimal parameters. By considering how the components of the system are interconnected and parameterized, we evaluated approximately 1,300 parameter combinations, over 4,000 hours of real-time agent-environment interactions, to identify 12 configurations that consistently demonstrated learning across multiple episodes. These configurations achieved significantly higher task performances than optimized silicon-based DQN agents under the same interaction budget. These findings represent an initial step toward robust and scalable goal-oriented learning using BNNs. Our framework establishes a foundation for applying task-driven neurocomputing and supports the development of field-wide benchmarks. In the long term, this work supports the development of hybrid bio-silicon architectures capable of efficient, adaptive and real-time computation, including the potential for robotic control applications.
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