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相关概念视频

Mass Analyzers: Overview01:13

Mass Analyzers: Overview

The mass analyzer is a crucial component of the mass spectrometer. In the ionization chamber, the vaporized sample is bombarded with a high-energy electron beam to generate a radical cation and further fragment into neutral molecules, radicals, and cations. A series of negatively charged accelerator plates accelerate the cations into the mass analyzer. The mass analyzer separates ions according to their mass-to-charge (m/z) ratios and then directs them to the detector. The common types of mass...
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.

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相关实验视频

Updated: Jun 25, 2026

Harvesting Solar Energy by Means of Charge-Separating Nanocrystals and Their Solids
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基于元结构的高性能化吸收器的设计,使用量子计算辅助的优化.

Seongmin Kim1, Shiwen Wu2,3, Ruda Jian2,3

  • 1Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States.

ACS applied materials & interfaces
|August 18, 2023
PubMed
概括

我们使用化 (TiN) 的元结构设计了一种高性能太阳能吸收器. 量子计算辅助的优化实现了超过95%的太阳吸收率,加速了用于采集太阳能的材料设计.

关键词:
机器学习是机器学习.超级结构的元结构.量子计算是一种量子计算.太阳能吸收器可以吸收太阳能热光伏发电系统是如何实现的

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科学领域:

  • 材料科学 材料科学 材料科学
  • 纳米技术 纳米技术
  • 量子计算是一种量子计算.

背景情况:

  • 化 (TiN) 的超结构在高温下具有很高的太阳吸收能力.
  • 目前的TiN元结构设计严重依赖于专家的直觉,限制了性能优化.

研究的目的:

  • 使用TiN元结构设计一个高性能太阳能吸收器.
  • 采用量子计算辅助的优化来加速功能材料的设计.

主要方法:

  • 开发了一个代优化方案,结合机器学习,量子和光学模拟.
  • 量子计算方法被用来设计用于太阳吸收的TiN元结构.

主要成果:

  • 优化的TiN元结构实现了超过95%的太阳吸收率.
  • 与详尽的搜索方法相比,设计过程得到了显著的加速,在40小时内完成.
  • 分析表明,Fabry-Perot干扰和表面等离子共振的组合有助于宽带吸收.

结论:

  • 量子计算辅助的优化方案有效地设计了高性能TiN太阳能吸收器.
  • 这种方法显示了太阳能采集的巨大潜力,可以应用于其他功能性材料.