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Observational Learning01:12

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Albert Bandura's observational learning, also known as imitation or modeling, occurs when a person observes and imitates another's behavior. It is a quicker process than operant conditioning. A well-known example is the Bobo doll study, where children who saw an adult acting aggressively towards the doll were more likely to act aggressively when left alone, compared to those who observed a nonaggressive adult. Many psychologists view observational learning as a form of latent learning...
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Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

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Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
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Neural Regulation01:37

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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Operant Conditioning Intervention01:24

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Operant conditioning serves as a foundational principle in therapeutic interventions aimed at modifying maladaptive behaviors. Central to this approach is the notion that behaviors, both adaptive and maladaptive, are learned through reinforcement. By analyzing the environmental factors that reinforce problematic behaviors, clinicians can design interventions to weaken these reinforcements and replace maladaptive behaviors with healthier alternatives.
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Reinforcement01:23

Reinforcement

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Positive and negative reinforcement are key concepts in operant conditioning, a learning process where the consequences of a behavior affect the likelihood of that behavior being repeated.
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Neural Control of Respiration01:18

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The neural regulation of respiration is a meticulously coordinated process primarily controlled by the respiratory centers located within the brainstem. These centers, composed of specialized neurons, transmit nerve impulses that control the contraction and relaxation of our respiratory muscles.
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A Fully Automated Rodent Conditioning Protocol for Sensorimotor Integration and Cognitive Control Experiments
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部分観測可能な遺伝子調節ネットワークにおける介入のための深層強化学習

Seyed Hamid Hosseini1, Mahdi Imani1

  • 1Department of Electrical and Computer Engineering at Northeastern University.

Proceedings of the ... American Control Conference. American Control Conference
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PubMed
まとめ
この要約は機械生成です。

本研究では、不完全なデータを持つ遺伝子調節ネットワーク(GRN)における介入の最適化のための深層強化学習フレームワークを提案します。この手法は、不確実性を効果的に管理して遺伝子活性を制御し、既存の手法を上回る性能を示します。

キーワード:
深層強化学習遺伝子調節ネットワーク部分観測性介入不確実性管理計算生物学システム生物学バイオインフォマティクス

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科学分野:

  • 計算生物学
  • システム生物学
  • バイオインフォマティクス

背景:

  • 遺伝子調節ネットワーク(GRN)は細胞機能を制御します。
  • 現実世界のGRN解析は、部分観測性とノイズの多いデータによって課題に直面しています。
  • 既存の介入手法は、完全なシステム状態情報を仮定することがよくあります。

研究 の 目的:

  • 部分観測可能なGRNにおける最適な介入方針のための深層強化学習フレームワークを開発すること。
  • 既存の完全観測を仮定する手法の限界に対処すること。
  • 遺伝子発現データと遺伝子活性の確率論における不確実性を管理すること。

主な方法:

  • 部分観測性を組み込むために、ブールネットワークモデルを拡張しました。
  • 信念状態を用いて状態事後確率分布を表し、信念空間における最適な介入方針を定式化しました。
  • 深層Qネットワーク(DQN)を適用して、最適な方針のスケーラブルな近似を行いました。
  • 不確実性が減少した場合に、最適な動的計画解への収束を解析的に実証しました。

主要な成果:

  • 提案された深層強化学習フレームワークは、GRNにおける部分観測性を効果的に処理します。
  • 信念状態は、データの不確実性と遺伝子活性の確率論を効果的に捉えます。
  • 黒色腫GRNに関する数値実験では、望ましい状態の維持とがん関連遺伝子活性の低減において、既存の方法と比較して性能が向上することが示されました。

結論:

  • 開発されたフレームワークは、複雑で部分観測可能な生物学的システムにおける介入戦略の設計に堅牢なアプローチを提供します。
  • 深層強化学習は、GRNにおける介入の最適化のためのスケーラブルなソリューションを提供します。
  • この手法は、特定の遺伝子調節経路を標的とすることによる精密医療と疾患制御への応用が期待されます。