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関連する概念動画

Velocity and Position by Graphical Method01:34

Velocity and Position by Graphical Method

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Velocity and position can be calculated from the known function of acceleration as a function of time. The total area under the acceleration-time graph and the velocity-time graph gives the change in velocity and position, respectively. In the case of an airplane, its acceleration is tracked using the inertial navigation system. The pilot provides the input of the airplane's initial position and velocity before takeoff. The inertial navigation system then uses the acceleration data to...
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Vector Algebra: Graphical Method01:10

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Vectors can be multiplied by scalars, added to other vectors, or subtracted from other vectors. The vector sum of two (or more) vectors is called the resultant vector or, for short, the resultant.
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Sequence Networks of Rotating Machines01:24

Sequence Networks of Rotating Machines

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A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...
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Two-Dimensional Force System: Problem Solving01:29

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Solving problems related to two-dimensional force systems is an essential aspect of mechanics and engineering. By applying the principles of vector analysis and force equilibrium, one can determine the effect of multiple forces acting on an object in a two-dimensional space.
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The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
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Three-Dimensional Force System:Problem Solving01:30

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A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
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Author Spotlight: Investigating the Effects of Mind-Body-Movement Practices on Brain Function
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人工エージェントにおけるグリッドのような表現を用いたベクトルベースのナビゲーション

Andrea Banino1,2,3, Caswell Barry4, Benigno Uria5

  • 1DeepMind, London, UK. abanino@google.com.

Nature
|May 11, 2018
PubMed
まとめ
この要約は機械生成です。

研究者は 複雑な環境で専門家レベルのナビゲーションを実現するために 哺乳類の脳にインスパイアされた 格子のような神経表現を用いた ディープ・アンフォースメント・ラーニング・エージェントを開発しました このアプローチは人工エージェントの空間認識と計画能力を高めます

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科学分野:

  • 神経科学
  • 人工知能
  • 計算神経科学

背景:

  • ディープ・ニューラル・ネットワークは 多くのタスクに優れているが ナビゲーションには苦戦する
  • 哺乳類のナビゲーションは エントルヒナル皮質のグリッド細胞に依存し 空間的表現と経路の統合を行います
  • 現在の人工物質は哺乳類に見られる 洗練された空間的認識を欠いています

研究 の 目的:

  • 哺乳類のようなナビゲーション能力を備えた ディープ・レインフォース・ラーニング・エージェントを開発する
  • 挑戦的な環境でエージェントのパフォーマンスを改善できるかどうかを調査する.
  • ナビゲーションのための新興のグリッドのような表現の計算上の利点を探求する.

主な方法:

  • 経路統合を繰り返すニューラルネットワークを訓練し,グリッドのような表現の出現を観察しました.
  • 深層補強学習ナビゲーションエージェントの基盤として利用しました
  • 熟悉しない変化する環境における専門家と比較剤との比較薬の性能を評価した.

主要な成果:

  • リキュアントネットワークはグリッド細胞や他のエントロリン細胞に似た表現を開発した.
  • グリッドのような表現を持つエージェントは,ナビゲーションのタスクにおいて,人間の専門家や他のエージェントを大幅に上回りました.
  • 発生したグリッド型の単位は,ベクトルベースのナビゲーションのためのメトリック量を提供し,ショートカット行動を可能にしました.

結論:

  • エマージント・グリッドのような表現は エウクリッド空間的メトリックとベクトル演算をエージェントに提供し, 熟練したナビゲーションに不可欠です.
  • このアプローチは,ベクトルベースのナビゲーションにおけるグリッド細胞の役割に関する神経科学の理論を支持します.
  • パスベースの戦略とベクトルベースの戦略をグリッドのような表現で組み合わせることで,複雑でダイナミックな環境でのナビゲーションが向上します.