人工智能架构演化的普适统计特征
阅读原文· arxiv.org研究人员基于935个消融实验发现,AI架构演化与生物演化共享相同的统计规律。架构修改的适应度效应分布(DFE)呈重尾Student's t分布:68%有害、19%中性、13%有益,使AI处于病毒与简单真核生物之间。DFE形态与果蝇和酵母高度相似,但有益变异占比(13%)显著高于生物学(1-6%),体现了定向搜索的优势。架构起源遵循逻辑斯谛增长,呈现间断平衡和适应性辐射,且14个特征被独立发明多次,展现出跨底质的趋同演化。
We test whether artificial intelligence architectural evolution obeys the same statistical laws as biological evolution. Compiling 935 ablation experiments from 161 publications, we show that the distribution of fitness effects (DFE) of architectural modifications follows a heavy-tailed Student's t-distribution with proportions (68% deleterious, 19% neutral, 13% beneficial for major ablations, n=568) that place AI between compact viral genomes and simple eukaryotes. The DFE shape matches D. melanogaster (normalized KS=0.07) and S. cerevisiae (KS=0.09); the elevated beneficial fraction (13% vs. 1-6% in biology) quantifies the advantage of directed over blind search while preserving the distributional form. Architectural origination follows logistic dynamics (R^2=0.994) with punctuated equilibria and adaptive radiation into domain niches. Fourteen architectural traits were independently invented 3-5 times, paralleling biological convergences. These results demonstrate that the statistical structure of evolution is substrate-independent, determined by fitness landscape topology rather than the mechanism of selection.