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相关概念视频

Network Function of a Circuit01:25

Network Function of a Circuit

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Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
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Functional groups are a group of atoms with characteristic properties, which when linked to the carbon skeleton of a molecule, alter the properties of that molecule. For example, the presence of certain functional groups on a molecule will make them hydrophilic, whereas others will make them hydrophobic. These functional groups are an indispensable part of organic chemistry and important components of biological molecules, such as carbohydrates, proteins, lipids, and nucleic acids. Each...
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Local attraction refers to disturbances in compass readings caused by magnetic influences from nearby objects such as metal fences, buried pipes, vehicles, buildings, power lines, or natural iron ore deposits. Small items like wristwatches, steel tools, or belt buckles can also interfere with the compass by creating local magnetic fields that distort the Earth's natural magnetic field. These distortions lead to inaccurate readings, posing navigation and land surveying challenges.Local...
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The potency and duration of action of local anesthetics (LAs) are determined by their pharmacokinetics. Pharmacokinetics describes how LAs are absorbed, distributed, metabolized, and eliminated from the body. When administered to the vascular tissues, LAs are quickly absorbed and enter the systemic circulation, reducing their localized effects. Adding vasoconstrictors such as epinephrine to LAs reduces their absorption into the systemic circulation, making them clinically effective. The...
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The highest and lowest values of a function, relative to a reference axis, are known as extreme values. These include absolute maximum and absolute minimum values, which represent the highest and lowest points the function reaches across its entire domain. Within a restricted portion of the function, the highest and lowest values are referred to as local maximum and local minimum values, respectively.Periodic functions, such as sine and cosine, show extreme values at infinitely many points due...
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走向使用神经网络局部混合函数的双局部双混合函数.

Nóra Kovács1, Szymon Śmiga2, Martin Kaupp1

  • 1Technische Universität Berlin, Institut für Chemie, Theoretische Chemie/Quantenchemie, Sekr. C7, Straße des 17. Juni 135, D-10623 Berlin, Germany.

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概括
此摘要是机器生成的。

第一个双重局部双重混合 (DLDH) 函数优化了取决于位置的混合,以进行交换和相关联. 优化的DLDH表现出更好的性能,可能消除了量子化学计算中分散校正的需要.

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科学领域:

  • 量子化学 是一个量子化学.
  • 计算化学计算化学
  • 材料科学 材料科学 材料科学

背景情况:

  • 传统的双混合功能器使用固定的混合参数.
  • 局部混合函数 (LMF) 提供位置依赖的参数化.
  • 神经网络可以用来训练像LMFs这样的复杂功能.

研究的目的:

  • 优化和评估新的"双局部双混合" (DLDH) 功能.
  • 为了研究DLDHs与位置依赖交换和相关性混合的性能.
  • 评估对DLDHs进行实证分散校正的必要性.

主要方法:

  • 开发和培训基于神经网络的局部混合函数 (LMFs) 以进行交换和相关联.
  • 使用W4-17原子化能量和BH76屏障高度对DLDH函数的评估.
  • 与常量混合的局部双杂交和局部杂交相比较.
  • 对-解离曲线的应用.

主要成果:

  • DLDH功能实现了高性能,与现有方法相匹配或超过现有方法.
  • 优化的DLDHs,特别是DL2DH变体,使得实证分散校正不必要.
  • 在非对应相互作用区域中的大相关LMF值解释了性能的提高.
  • 位置依赖混合提供了改善强相关性效应处理的潜力.

结论:

  • DLDHs代表了密度函数理论的一个有希望的进步.
  • 在DLDH中取决于位置的混合显著提高了准确性,并可以消除对分散的纠正的需要.
  • 进一步开发DLDH可以导致更准确和更有效的量子化学计算.