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相关概念视频

Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
Atomic Absorption Spectroscopy: Radiation and Light Sources01:13

Atomic Absorption Spectroscopy: Radiation and Light Sources

Atomic absorption spectroscopy (AAS) relies on the Beer-Lambert law, which requires that the radiation source emits a narrow range of wavelengths to match the absorption characteristics of the analyte atom. The primary criteria for choosing an appropriate radiation source in AAS is to provide a precise and intense emission at specific wavelengths that will allow accurate detection of the analyte.
Two common narrow-range 'line' sources used in AAS are hollow-cathode lamps (HCLs) and...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.

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相关实验视频

Updated: Jun 18, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

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通过从散射介质中采样噪声来产生光子衍射发生器.

Ziyu Zhan1, Hao Wang1, Qiang Liu2,3,4

  • 1Department of Precision Instrument, Tsinghua University, Beijing, China.

Nature communications
|December 6, 2024
PubMed
概括
此摘要是机器生成的。

这项研究介绍了一种新的光子生成机器,它使用光散射来生成图像,克服了光子神经网络加速器之前的局限性. 这一进步使高质量的图像合成能够用于各种应用.

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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials

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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
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Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

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相关实验视频

Last Updated: Jun 18, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

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Using Microwave and Macroscopic Samples of Dielectric Solids to Study the Photonic Properties of Disordered Photonic Bandgap Materials
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科学领域:

  • 这是光子计算.
  • 光学神经网络是指光学神经网络.
  • 生成型模型 生成型模型

背景情况:

  • 光子计算为神经网络 (NN) 加速器提供高并行性,低延迟和能源效率.
  • 现有的光子加速器主要专注于歧视性NN,由于数据可访问性和硬件挑战,大规模生成机器未得到充分探索.

研究的目的:

  • 开发一个大规模的生成光子计算机器用于图像生成.
  • 在光子生成模型中解决数据可访问性和硬件可行性问题.
  • 通过使用先进的光子NN架构来提高图像生成性能.

主要方法:

  • 利用无序介质中的随机光散射作为本地噪声源.
  • 采用大规模衍射光学计算用于图像生成.
  • 设计两种编码策略,用于图像对光学噪声潜伏空间映射.
  • 在光子NN架构中使用分折层的级联和并行配置.

主要成果:

  • 在标准的公共数据集中成功生成了清晰有意义的合成图像.
  • 通过利用光的空间平行性来证明硬件的一致性.
  • 通过有效的编码策略来克服培训问题,以获得实验数据的可访问性.

结论:

  • 这项工作通过实现功能性的光子生成机器,为光子计算做出了重大贡献.
  • 开发的光子发生器为复杂的应用铺平了道路,例如现实世界数据增强和多式联网生成.
  • 该研究强调了无序介质和衍射光学在高级生成任务中的潜力.