Stock Raphael, Kaiser Jakob, Müller Eric, Schemmel Johannes, Schmitt Sebastian
Kirchhoff Institute for Physics, Heidelberg University, Heidelberg, 69120, Germany.
European Institute for Neuromorphic Computing, Heidelberg University, Heidelberg, 69120, Germany.
Open Res Eur. 2024 Nov 14;3:144. doi: 10.12688/openreseurope.15775.2. eCollection 2023.
Finding appropriate model parameters for multi-compartmental neuron models can be challenging. Parameters such as the leak and axial conductance are not always directly derivable from neuron observations but are crucial for replicating desired observations. The objective of this study is to replicate the attenuation behavior of an excitatory postsynaptic potential (EPSP) traveling along a linear chain of compartments on the analog BrainScaleS-2 neuromorphic hardware platform.
In the present publication we use genetic algorithms to find suitable model parameters. They promise parameterization without domain knowledge of the neuromorphic substrate or underlying neuron model. To validate the results of the genetic algorithms, a comprehensive grid search was conducted. Furthermore, trial-to-trial variations in the analog system are counteracted utilizing spike-triggered averaging.
The algorithm successfully replicated the desired EPSP attenuation behavior in both single and multi-objective searches illustrating the applicability of genetic algorithms to parameterize analog neuromorphic hardware.
为多房室神经元模型找到合适的模型参数可能具有挑战性。诸如泄漏电导和轴向电导等参数并非总是能直接从神经元观测中得出,但对于复制所需观测结果至关重要。本研究的目的是在模拟BrainScaleS-2神经形态硬件平台上复制沿着线性房室链传播的兴奋性突触后电位(EPSP)的衰减行为。
在本出版物中,我们使用遗传算法来寻找合适的模型参数。它们有望在无需神经形态基质或基础神经元模型领域知识的情况下进行参数化。为了验证遗传算法的结果,进行了全面的网格搜索。此外,利用尖峰触发平均来抵消模拟系统中试验间的变化。
该算法在单目标和多目标搜索中均成功复制了所需的EPSP衰减行为,说明了遗传算法在模拟神经形态硬件参数化方面的适用性。