残差ネットワークにおける最適な信号伝播のための場理論
Kirsten Fischer1,2, David Dahmen1, Moritz Helias1,3
1Jülich Research Centre, Jülich, Institute for Advanced Simulation (IAS-6), Germany.
Physical review. E
|January 21, 2026
まとめ
スキップ接続を備えた残差ネットワーク(ResNet)は、より優れた性能を発揮します。この研究では、ResNetのスケーリングパラメータが性能を向上させ、ハイパーパラメータ全体にわたって一般化される仕組みを説明する理論を開発します。
科学分野:
- 深層学習理論
- ニューラルネットワークアーキテクチャ
- 機械学習
背景:
- 残差ネットワーク(ResNet)は、スキップ接続により、深いアーキテクチャにおいてフィードフォワードネットワークよりも優れた性能を発揮する。
- 残差分岐のスケーリングパラメータは一般化を向上させるが、そのメカニズムと普遍性は不明確である。
研究 の 目的:
- 残差ネットワークの有限サイズ場理論を開発する。
- 信号伝播と残差分岐スケーリングパラメータの影響を分析する。
- 性能向上とスケーリングパラメータの普遍性を説明する。
主な方法:
- ResNetの系統的な有限サイズ場理論の導出。
- 入力感度を測定するための応答関数の解析的導出。
- スケーリングパラメータのネットワークハイパーパラメータへの依存性の分析。
主要な成果:
- 深層残差ネットワークにおいて経験的に最適なスケーリングパラメータ値は、最大のネットワーク感度の範囲内に収まる。
- ハイパーパラメータ(重み分散など)への依存性が弱いことが示された最適なスケーリングパラメータのアナロジー表現を導出した。
- これにより、スケーリングパラメータの有効性の観察された普遍性が説明される。
結論:
- 有限サイズのResNetを分析するための理論的枠組みが確立された。
- 本研究は、残差分岐スケーリングパラメータの利点のメカニズム的理解を提供する。
- 本研究の結果は、性能向上のためのハイパーパラメータ調整とネットワーク設計に関する洞察を提供する。
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