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関連する概念動画

Centroid of a Body: Problem Solving01:03

Centroid of a Body: Problem Solving

1.3K
The centroid of a body is a crucial concept in engineering and physics. Finding the centroid of a body can help determine its stability, its balance point, and even its design. In this context, consider a thin wire bent in the form of a quarter circular arc. Polar coordinates are used to calculate the centroid. The wire is first divided into small differential elements of a length equal to the radius multiplied by the differential angle.
The x-coordinates and y-coordinates of each element's...
1.3K
Centroid of a Body01:16

Centroid of a Body

1.2K
The centroid is an important concept in engineering, physics, and mechanics. It is the geometric center of a body. It always lies within the body except in cases with holes or cavities. When the material that a body is composed of is uniform or homogeneous, the centroid coincides with its center of mass or the center of gravity.
For a homogeneous body with constant density, the centroid can usually be found using equations representing a balance of the moments of the body's volume. If the...
1.2K
Relative Motion Analysis using Rotating Axes01:25

Relative Motion Analysis using Rotating Axes

531
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
531
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

449
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
449
Structural Classification of Joints01:20

Structural Classification of Joints

4.1K
Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
A fibrous joint is where the adjacent bones are united by fibrous connective...
4.1K
Kinematic Equations for Rotation01:30

Kinematic Equations for Rotation

374
In mechanics, when one observes a rigid body in rotational motion with constant angular acceleration, it is possible to establish equations for its rotational kinematics. This process resembles how linear kinematics are dealt with in simpler motion studies.
For instance, imagine a point A on a rigid body engaged in circular motion. The translational velocity of this particular point can be calculated by taking the time derivatives of the displacement equation, which essentially measures the...
374

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関連する実験動画

Updated: Sep 10, 2025

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
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Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

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3D人間ポーズ推定のための起源中心の部分ベースのポーズ分解

Zhijie Lin1, Jinxin Yao2, Juan Huang3

  • 1School of Information and Electronic Engineering, Zhejiang University of Science and Technology, Hangzhou, 310023, China. linzhijie@zust.edu.cn.

Scientific reports
|August 23, 2025
PubMed
まとめ
この要約は機械生成です。

この研究では,3Dの人間の姿勢の推定のためのOrigin-centric パーツトランスフォーマー (OPFormer) が導入されます. OPFormerは,骨格の部分を分離し再結合することで,ローカルとグローバルな特徴の学習を改善します.

さらに関連する動画

Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings
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Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings

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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

Published on: August 30, 2016

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関連する実験動画

Last Updated: Sep 10, 2025

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
09:41

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping

Published on: April 21, 2023

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Postural Organization of Gait Initiation for Biomechanical Analysis Using Force Platform Recordings
06:21

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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb
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Sit-to-stand-and-walk from 120% Knee Height: A Novel Approach to Assess Dynamic Postural Control Independent of Lead-limb

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科学分野:

  • コンピュータ・ビジョン
  • 機械学習

背景:

  • トランスフォーマーモデルは 2D画像から 3Dの人間の姿勢の見積もりを示しています
  • 現在の方法は グローバルな骨格の文脈と 局所的な関節の特徴のバランスをとるのに苦労しています

研究 の 目的:

  • 改善された3D人間の姿勢の見積もりのために,新しいトランスフォーマーブロック,Origin-centric Part Transformer (OPFormer) を提案する.
  • グローバルとローカルの両方の空間的依存性を2Dの人間の骨格で捉えるための制限に対処します.

主な方法:

  • 骨格分離と骨格再結合のステップでOPFormerブロックを導入しました.
  • 骨格分離は 細粒子の局所的な空間特性を抽出します
  • スケルト・リコンビネーションは 人間の骨格の起源を使って 空間トランスフォーマー・エンコーダーで ローカルとグローバルの特徴を融合させます

主要な成果:

  • Human3.6MとMPI-INF-3DHPのデータセットで最先端の性能を達成しました.
  • OPFormerは,追加のトレーニングデータなしでHuman3.6Mで37.6mmの平均関節位置誤差 (MPJPE) を達成しました.
  • 3D人間のポーズ評価の 卓越した精度を示した.

結論:

  • OPFormerブロックは,正確な3D人間の姿勢の見積もりのために,ローカルとグローバル機能を効果的に統合します.
  • この新しいアプローチは 2Dから3Dの人間のポーズ再構築の分野を前進させています
  • OPFormerは,単眼2D入力から正確な人間のポーズ推定のための堅牢なソリューションを提供します.