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相关概念视频

What is Climate?01:16

What is Climate?

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Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
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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.
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Temperature and Thermal Equilibrium01:11

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Heat and temperature are essential concepts for everyone every day. The study of heat and temperature is part of an area of physics known as thermodynamics. It is not always easy to distinguish heat and temperature.
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The spontaneity of a process depends upon the temperature of the system. Phase transitions, for example, will proceed spontaneously in one direction or the other depending upon the temperature of the substance in question. Likewise, some chemical reactions can also exhibit temperature-dependent spontaneities. To illustrate this concept, the equation relating free energy change to the enthalpy and entropy changes for the process is considered:
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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Simulating Temperature in a Soil Incubation Experiment
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在两个不同的气候中,场景对比温度在两个不同的气候中.

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    此摘要是机器生成的。

    在中波红外 (MWIR) 和长波红外 (LWIR) 系统中,场景对比温度 (SCT) 在不同气候下有所不同. 一般来说,LWIR显示出更高的SCT,除了在寒冷的日光条件下.

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    科学领域:

    • 红外成像技术 红外成像技术
    • 目标化任务绩效的目标化
    • 气候对传感器性能的影响

    背景情况:

    • 场景对比温度 (SCT) 测量了用于视觉任务执行的温度和光子流量变化.
    • 以前的研究比较了中波红外 (MWIR) 和长波红外 (LWIR) SCT 在炎热干燥的气候.
    • 关于SCT在各种气候条件下的表现的数据有限.

    研究的目的:

    • 将MWIR和LWIR系统在热干气候和冷干气候之间进行SCT比较.
    • 评估气候对红外传感器性能的影响,以确定目标任务.

    主要方法:

    • 收集了MWIR和LWIR系统的SCT数据.
    • 在热,干燥和冷,干燥的环境条件下比较SCT测量.
    • 分析了基于气候和传感器类型的性能变化.

    主要成果:

    • 在大多数测试条件下,SCT在LWIR系统中通常更高.
    • 在寒冷,白天的环境中观察到一个例外,SCT变化.
    • 气候显著影响红外传感器性能指标.

    结论:

    • 在各种气候条件下,LWIR系统显示出更高的SCT,这影响了准性能.
    • 寒冷的日光条件为MWIR和LWIRSCT比较提供了独特的场景.
    • 了解特定于气候的SCT对于优化红外系统部署至关重要.