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Volatilization01:10

Volatilization

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Volatilization gravimetry is an analytical technique that measures the mass lost due to the volatilization of the substance. This technique is used to estimate the amount of volatile material in a sample. To perform this method, heat a known amount of the sample to a high temperature in a crucible or other suitable vessel. The volatile substance in the sample evaporates, and the vapor is completely expelled from the crucible either by heating the sample or bubbling a stream of inert gas through...
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Phase Transitions02:31

Phase Transitions

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Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
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What is Energy?04:10

What is Energy?

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The universe is composed of matter in different forms, and all forms of matter contain energy.  The different forms of energy on Earth originate from the Sun — the ultimate energy source. Plants capture light energy from the Sun, and, via the process of photosynthesis, convert it into chemical energy. This stored energy from plants can be harnessed in many ways. For example, eating plant products as food provides energy for our body to function, and burning wood or coal (fossilized...
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Free Energy01:21

Free Energy

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Free energy—abbreviated as G for the scientist Gibbs who discovered it—is a measurement of useful energy that can be extracted from a reaction to do work. It is the energy in a chemical reaction that is available after entropy is accounted for. Reactions that take in energy are considered endergonic and reactions that release energy are exergonic. Plants carry out endergonic reactions by taking in sunlight and carbon dioxide to produce glucose and oxygen. Animals, in turn, break...
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Phase Transitions: Sublimation and Deposition02:33

Phase Transitions: Sublimation and Deposition

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Some solids can transition directly into the gaseous state, bypassing the liquid state, via a process known as sublimation. At room temperature and standard pressure, a piece of dry ice (solid CO2) sublimes, appearing to gradually disappear without ever forming any liquid. Snow and ice sublimate at temperatures below the melting point of water, a slow process that may be accelerated by winds and the reduced atmospheric pressures at high altitudes. When solid iodine is warmed, the solid sublimes...
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Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

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Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
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通过2D铁电/TMD异构结构实现超低能耗的非易失相调.

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概括

研究人员使用一种新的二维铁电材料开发了一种用于光子内存计算的紧,低损耗相调节器. 该设备提供了超低能耗和多级内存,为高效的光学神经网络铺平了道路.

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紧性 紧性的阶段调制阶段调制铁电是铁电的发电源.低损耗的低损耗的电池.多级别的内存多级别的内存.不易挥发的 不易挥发的超低能耗 超低能耗 超低能耗

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科学领域:

  • 材料科学 材料科学 材料科学
  • 光子学 是一个光子学.
  • 计算机工程 计算机工程

背景情况:

  • 非挥发性,低损耗相调和低能耗对于光子内存计算至关重要.
  • 现有的光子记忆解决方案通常需要很大的足迹,导致高插入损失和能源使用.
  • 需要新的材料和设备架构来克服这些局限性.

研究的目的:

  • 为了展示一个紧的,非挥发性相调节器,用于光子内存计算的超低能耗.
  • 为了利用二维铁电材料进行高效的光学索引调整.
  • 展示该设备在光学神经网络中的潜力.

主要方法:

  • 在SiN微环共振器上制造一个由WS2/CIPS/石墨烯组成的异构结构装置.
  • 在CuInP2S6 (CIPS) 中利用Cu+诱导的偏振来对WS2折射率进行静电调整.
  • 切换能量的表征,写入速度,插入损失,内存保留和多级别存储能力.

主要成果:

  • 展示了一种紧的非挥发性相调节器,具有超低的切换能量 (2.5 pJ/周期) 和插入损耗 (0.2 dB).
  • 实现了5V/μs的快速写入速度和稳定的8位多级内存,预计保留时间>10年.
  • 将调制器集成到光学神经网络中,在MNIST手写数字识别上达到92%的准确性.

结论:

  • 开发的WS2/CIPS/石墨烯异构结构为高性能光子内存计算提供了一个有前途的解决方案.
  • 该设备的紧尺寸,低能耗和非挥发性多级内存是其关键优势.
  • 这项工作为开发高效的硬件加速神经网络建立了新的途径.