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関連する概念動画

Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

2.4K
Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
2.4K
Torque01:10

Torque

22.6K
Torque is an important quantity for describing the dynamics of a rotating rigid body. We see the application of torque in many ways in the world, such as when pressing the accelerator in a car, which causes the engine to apply additional torque on the drivetrain. Here, we define torque and provide a framework to create an equation to calculate torque for a rigid body with fixed-axis rotation.
Torque can be considered as the rotational counterpart to force. Since forces change the translational...
22.6K
Nuclear Fusion02:45

Nuclear Fusion

33.9K
The process of converting very light nuclei into heavier nuclei is also accompanied by the conversion of mass into large amounts of energy, a process called fusion. The principal source of energy in the sun is a net fusion reaction in which four hydrogen nuclei fuse and ultimately produce one helium nucleus and two positrons.
A helium nucleus has a mass that is 0.7% less than that of four hydrogen nuclei; this lost mass is converted into energy during the fusion. This reaction produces about...
33.9K
Torque Free Motion01:15

Torque Free Motion

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The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...
818
Net Torque Calculations01:19

Net Torque Calculations

11.5K
When a mechanic tries to remove a hex nut with a wrench, it is easier if the force is applied at the farthest end of the wrench handle. The lever arm is the distance from the pivot point (the hex nut in this case) to the person’s hand. If this distance is large, the torque is higher. Only the component of the force perpendicular to the lever arm contributes to the torque. Therefore, pushing the wrench perpendicular to the lever arm is more advantageous. If multiple people apply force to...
11.5K
Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

7.0K
Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
7.0K

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関連する実験動画

Updated: Feb 6, 2026

Author Spotlight: Assessing Brain Activity in Robotic-Assisted Lower Limb Rehabilitation Using fNIRS
05:25

Author Spotlight: Assessing Brain Activity in Robotic-Assisted Lower Limb Rehabilitation Using fNIRS

Published on: June 7, 2024

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デュアルブランチ融合ネットワーク：下肢多関節トルクの精密デコーディング

Fei Liang, Xin Shi, Hao Lu

    IEEE transactions on bio-medical engineering
    |February 4, 2026
    PubMed
    まとめ
    この要約は機械生成です。

    この研究は、正確なリアルタイム下肢関節トルク推定のための新しいデュアルブランチ深層学習フレームワークを導入します。この方法は、高速で信頼性の高い適応型トルク制御を提供することにより、人間-外骨格相互作用を強化します。

    キーワード:
    下肢関節トルク推定人間-外骨格相互作用深層学習適応型制御リアルタイム推定

    さらに関連する動画

    In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig
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    In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig

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    Decoding Natural Behavior from Neuroethological Embedding
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    関連する実験動画

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    Author Spotlight: Assessing Brain Activity in Robotic-Assisted Lower Limb Rehabilitation Using fNIRS
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    In Vivo Measurement of Hindlimb Dorsiflexor Isometric Torque from Pig
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    科学分野:

    • 生物医学工学; ロボット工学; 機械学習

    背景:

    • 正確なリアルタイム下肢関節トルク推定は、適応型人間-外骨格相互作用にとって重要です。; 既存の方法は、多様な歩行や動的な環境への対応に苦労しています。

    研究 の 目的:

    • 多様な歩行条件下での正確なリアルタイム下肢関節トルク推定のための新しいフレームワークを開発すること。; 精密なトルク制御による適応型人間-外骨格相互作用を改善すること。

    主な方法:

    • 時間的畳み込みネットワーク（TCN）とTransformerを組み合わせたデュアルブランチアーキテクチャを開発しました。; TCNは局所的な時間的ダイナミクスを処理し、Transformerはグローバルな依存関係を捉えました。; 特徴合成のために、残差強化を備えた関節固有のタスク認識型残差融合メカニズムを採用しました。

    主要な成果:

    • このフレームワークは、12の歩行パターン全体で高い精度を達成し、低い二乗平均平方根誤差（例：膝で0.1405 Nm/kg）と高いピアソン相関係数（例：足首で0.9904）を記録しました。; 4.2912 msの低遅延を維持し、計算効率を示しました。; 公開データセットで強力な適応性を示しました。

    結論:

    • 提案された方法は、リアルタイムアプリケーションに必要な計算効率と高い推定精度を効果的にバランスさせます。; 動的な環境への適応における限界を人間-外骨格システムに対してうまく解決します。; この進歩は、適応型外骨格トルク制御のための高速で信頼性の高いソリューションを提供し、自然な人間-ロボット相互作用を強化します。