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相关概念视频

Frost Action on Concrete01:27

Frost Action on Concrete

94
Concrete structures in cold climates, such as those along roadsides, can retain moisture. This moisture makes them susceptible to frost-related damage when temperatures fall below freezing. Adding moisture worsens the damage during temperature fluctuations, leading to repeated freezing and thawing. De-icing salts, spread over these structures to melt ice, add to the freeze-thaw cycle, and draw even more moisture into the concrete.
This freeze-thaw cycle primarily causes surface scaling, where...
94
Frost Resistant Concrete01:29

Frost Resistant Concrete

75
Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
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Introduction to Plant Diversity02:22

Introduction to Plant Diversity

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From Water to Land
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Masonry in Cold and Hot Weather Conditions01:21

Masonry in Cold and Hot Weather Conditions

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In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units...
82
Decreased Body Temperature01:29

Decreased Body Temperature

602
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
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Responses to Heat and Cold Stress02:45

Responses to Heat and Cold Stress

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Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
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相关实验视频

Updated: Jun 17, 2025

Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications

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坚固的全天防表面

Wei Ma1, Aleksandr A Sergeev2, Muhammad Bilal Asif1

  • 1Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China.

ACS applied materials & interfaces
|August 8, 2024
PubMed
概括

这项研究引入了一种具有超疏水性太阳热层 (VSSs) 的新型V槽表面,用于有效的全天控制. VSS表面防止积,并增强太阳能热解,确保在极端环境中耐用.

关键词:
一整天的冰恐惧症.强壮的 坚固的 坚固的太阳能热能公司空间控制 空间控制超水性 超水性

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Manufacturing Simple and Inexpensive Soil Surface Temperature and Gravimetric Water Content Sensors
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The Use of High-resolution Infrared Thermography HRIT for the Study of Ice Nucleation and Ice Propagation in Plants
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The Use of High-resolution Infrared Thermography HRIT for the Study of Ice Nucleation and Ice Propagation in Plants

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科学领域:

  • 材料科学 材料科学 材料科学
  • 表面工程是什么?表面工程是什么?
  • 纳米技术纳米技术

背景情况:

  • 在表面上形成结会造成结构损坏,并降低传热效率.
  • 现有的太阳能热和超疏水表面因夜间积和易受磨损而扎着全天的防恐惧症.
  • 纳米结构涂层通常缺乏长期户外应用的耐用性.

研究的目的:

  • 开发一种创新的防表面,具有强大的全天性能和耐用性.
  • 为了克服当前太阳能热防/解技术的局限性.
  • 创建一个能够防止积的表面,并促进有效的太阳能热解.

主要方法:

  • 制造了一种新型的表面,其中包含具有超疏水性太阳热层 (VSSs) 的V槽结构.
  • 调查VSS表面通过外平面梯度结构调节蒸汽扩散的能力.
  • 评估VSS表面增强的光热效应和防水能力.

主要成果:

  • 通过促进空间调节的蒸汽扩散,VSS表面可以防止一夜之间完全的覆盖.
  • 增强的光热效应和强大的反水性有助于在白天有效的太阳能热解.
  • 该VSS表面表现出了特殊的耐用性和防磨保护.

结论:

  • 在VSS表面提供了一个有前途的解决方案,强大的全天防和高效的太阳能热解.
  • 创新的设计确保了在极端环境中延长寿命和可靠的性能.
  • 这项技术在需要减的实际应用中具有显著的潜力.