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相关概念视频

Morphogenesis02:19

Morphogenesis

28.3K
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
28.3K
Microbial Morphologies01:29

Microbial Morphologies

35
Bacterial and archaeal cells exhibit remarkable diversity in shape and structure, critical in their adaptability and functionality. Among bacteria, the most commonly observed shapes include cocci and bacilli. Cocci are spherical and may exist singly or in groupings such as pairs (diplococci), chains (streptococci), clusters (staphylococci), or tetrads. Bacilli, in contrast, are rod-shaped and can also occur as single cells, in pairs, or chains, depending on their environmental and genetic...
35
Plastic Deformations01:14

Plastic Deformations

101
It is essential to understand how structural members behave under plastic deformation when the bending stress exceeds the material's yield strength. This state of deformation permanently alters the shape of the member, in contrast to the linear elastic behavior observed before yielding. The strain at any point in the member is expressed in terms of maximum strain. Notably, the neutral axis, which coincides with the centroid during elastic bending, shifts away from the centroid under plastic...
101
Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

103
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
103
Plastic Deformation in Circular Shafts01:20

Plastic Deformation in Circular Shafts

201
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
201

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相关实验视频

Updated: Jul 15, 2025

Creating Objects and Object Categories for Studying Perception and Perceptual Learning
14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

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嵌入式形状变形用于形态适应性机器人

Jiefeng Sun1,2, Elisha Lerner3, Brandon Tighe3

  • 1Adaptive Robotics Lab, Department of Mechanical Engineering, Colorado State University, Fort Collins, CO, USA. jiefeng.sun@yale.edu.

Nature communications
|September 27, 2023
PubMed
概括

研究人员为机器人开发了一种嵌入式形状变形系统,将驱动,传感和锁定集成到机器人中.

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Designing a Bio-responsive Robot from DNA Origami
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相关实验视频

Last Updated: Jul 15, 2025

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14:38

Creating Objects and Object Categories for Studying Perception and Perceptual Learning

Published on: November 2, 2012

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程

背景情况:

  • 现有的形状变形机器人通常需要外部设备,这限制了它们的自主性和实用性.
  • 将形状变形能力直接集成到机器人的身体中是一个重大挑战.

研究的目的:

  • 为机器人引入一种新的嵌入式形状变形方案.
  • 为了演示机器人体内的形状激活,感应和锁定的整合.
  • 通过各种机器人系统展示这种嵌入式方案的多功能性.

主要方法:

  • 开发一个集成的形状变形系统与嵌入式的驱动,传感和锁定机制.
  • 设计和制造三种不同的变形机器人系统:自适应式抓手,四足机器人和无两机器人.
  • 创建一个嵌入式变形模块库,用于可编程的形状转换.

主要成果:

  • 成功演示了能够自适应抓取的自我感知形状变形抓柄.
  • 展示了一种四足机器人,可以改变其身体形状以实现各种陆地运动 (行走,爬行,爬).
  • 介绍了一种无机器人,能够将其四肢转化为两运动,并提供了一个模块库,用于多功能可编程形状.

结论:

  • 嵌入式形状变形方案使机器人能够自主地重新配置它们的形态.
  • 这种综合方法克服了外部支持设备的局限性,为更具适应性和多功能机器人铺平了道路.
  • 开发的系统为各种环境中的按需形态适应提供了一个有希望的解决方案.