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相关概念视频

Principle of Equivalence01:18

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According to Albert Einstein (1897-1955), free-falling and feeling weightless are intrinsically linked. If a person were in free-fall under gravity, for example, diving towards the Earth from an airplane, they would feel completely weightless. Similarly, a person descending in a lift may feel partially weightless. Broadly speaking, it is assumed that an object in a uniform gravitational field and an object undergoing constant acceleration in the absence of gravity are under the same...
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A rocket's velocity in the presence of a gravitational field is decreased by the amount of force exerted by Earth's gravitational field, which opposes the motion of the rocket. If we consider thrust, that is, the force exerted on a rocket by the exhaust gases, then a rocket's thrust is greater in outer space than in the atmosphere or on a launch pad. In fact, gases are easier to expel in a vacuum.
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相关实验视频

Updated: Jan 7, 2026

Coherence between Brain Cortical Function and Neurocognitive Performance during Changed Gravity Conditions
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太空飞行噪音对微重力环境中的人类表现的影响

Jiangyong Li, Yu Gan, Yangyu Sima

    Aerospace medicine and human performance
    |December 29, 2025
    PubMed
    概括

    航天器噪音显著影响宇航员的认知负载和性能. 高噪音水平 (超过65dB) 在微重力条件下会损害认知功能和任务准确性,影响任务的成功.

    科学领域:

    • 人类因素和在极端环境中的表现.
    • 航空航天医学和人类生理学
    • 太空探索中的职业健康和安全.

    背景情况:

    • 太空船会产生来自生命支持,电子设备和态度控制系统的持续噪音.
    • 不同的噪声强度对微重力中的认知负载和性能的影响仍然不太清楚.
    • 了解这些影响对于宇航员的福祉和任务的有效性至关重要.

    研究的目的:

    • 研究不同航天器噪声强度水平在模拟微重力环境中对认知负载和操作性能的影响.
    • 量化噪声暴露与人类表现指标 (如瞳孔膨胀,任务完成时间和准确性) 之间的关系.
    • 为改善航天器可居住性和宇航员任务优化提供经验数据.

    主要方法:

    • 30名志愿者在虚拟现实下垂姿势中执行模拟空间站任务 (警告报警,约会/对接).
    • 从天龙空间站记录的四种不同的噪声强度水平被用来模拟典型的功能模块噪声.
    • 认知负载通过平均瞳孔直径,以及任务完成时间和准确度来评估.

    主要成果:

    • 稳定状态噪声强度显著影响了平均瞳孔直径,这表明对认知负载有很大影响.
    • 噪音水平超过65dB (A) 显著增加认知负载干扰和运行效率降低.
    • 随着噪音水平的增加,任务准确性逐渐下降,警报事件的复杂性延长了任务完成时间.
    关键词:
    认知负载的认知负载噪音 噪音 噪音 噪音模拟空间环境的模拟空间环境任务执行任务的表现.

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    结论:

    • 这项研究提供了关于不同噪音水平如何影响微重力环境中的人类表现的新经验证据.
    • 研究结果强调了高强度噪音对认知负载和任务执行的有害影响.
    • 这些结果对于提高航天器可居住性设计和优化未来任务中宇航员性能至关重要.