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相关概念视频

Stereotype Content Model02:16

Stereotype Content Model

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The Stereotype Content Model (SCM) was first proposed by Susan Fiske and her colleagues (Fiske, Cuddy, Glick & Xu, 2002; see also Fiske, 2012 and Fiske, 2017). The SCM specifies that when someone encounters a new group, they will stereotype them based on two metrics: warmth—or that group’s perceived intent, and how likely they are to provide help or inflict harm—and competence—or their ability to carry out that objective. Depending on the warmth-competence...
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Design Example: Vintage Mixing Console01:17

Design Example: Vintage Mixing Console

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A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
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Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

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In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
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Electro-mechanical Systems01:19

Electro-mechanical Systems

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Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
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PD Controller: Design01:26

PD Controller: Design

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In automotive engineering, car suspension systems often employ Proportional Derivative (PD) controllers to enhance performance. PD controllers are utilized to adjust the damping force in response to road conditions. A controller, acting as an amplifier with a constant gain, demonstrates proportional control, with output directly mirroring input.
Designing a continuous-data controller requires selecting and linking components like adders and integrators, which are fundamental in Proportional,...
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System of Memory01:23

System of Memory

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Memory is categorized into three major systems: sensory memory, short-term memory (STM), and long-term memory (LTM). These systems differ in their capacity and the duration for which they can hold information. Sensory memory captures raw sensory input from the environment, holding it for just a few seconds or less. For example, on hearing a brief, loud sound, like a car horn honking, the sound seems to linger in the mind for a moment even after it stops. This is an instance of sensory memory...
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相关实验视频

Updated: May 6, 2026

Shape Memory Polymers for Active Cell Culture
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通过多模式建模设计的低歇斯底里形状记忆陶

Edward L Pang1, Gregory B Olson1, Christopher A Schuh2

  • 1Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.

Nature
|October 5, 2022
PubMed
概括
此摘要是机器生成的。

研究人员为高温形状记忆应用设计了陶. 他们实现了创纪录的低歇斯底里, 使这些先进的陶适用于苛刻的用途.

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科学领域:

  • 材料科学
  • 陶工程
  • 阶段转换

背景情况:

  • 陶具有马氏体相变,可用于高温形状记忆和超弹性应用.
  • 合金可以减少马氏体材料的歇斯底里,但由于体积变化和动力障碍,石存在挑战.

研究的目的:

  • 开发一种用于增强晶设计的方法.
  • 解决体积变化和转换温度管理等物理限制.
  • 利用计算热力学和数据科学来设计新的多元组件组成.

主要方法:

  • 增强格子工程方法用于马石设计.
  • 计算热力学和数据科学工具的应用
  • 探索复杂的,数据稀缺的多元空间.

主要成果:

  • 开发了一种具有创纪录低歇斯底里 (15K) 的新合物.
  • 这种歇斯底里比典型值低约10倍,比之前报告的最佳值低5倍.
  • 实现的歇斯底里可以与广泛使用的形状记忆合金相比较.

结论:

  • 开发的方法成功地解决了晶格子工程的局限性.
  • 这种新型的合物显示出作为高温形状记忆材料的潜力.
  • 这一突破为在极端环境中先进陶应用铺平了道路.