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関連する概念動画

Electro-mechanical Systems01:19

Electro-mechanical Systems

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Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...
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Resonance02:52

Resonance

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The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds.
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Frequency-dependent Selection01:21

Frequency-dependent Selection

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When the fitness of a trait is influenced by how common it is (i.e., its frequency) relative to different traits within a population, this is referred to as frequency-dependent selection. Frequency-dependent selection may occur between species or within a single species. This type of selection can either be positive—with more common phenotypes having higher fitness—or negative, with rarer phenotypes conferring increased fitness.
23.4K
What is a Frequency Distribution00:51

What is a Frequency Distribution

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A frequency is the number of times a value of the data occurs. The sum of all the frequency values represents the total number of students included in the sample. It is commonly used to group data of quantitative types. Frequency distributions can be displayed in a table, histogram, line graph, dot plot, or pie chart, just to name a few. A histogram is a graphical representation of tabulated frequencies, shown as adjacent rectangles, erected over discrete intervals (bins), with an area equal to...
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Mean From a Frequency Distribution01:11

Mean From a Frequency Distribution

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Sometimes, data gathered from an experiment on a large sample or population are organized into concise tables. In such cases, the frequency of the quantitative data set is plotted in the form of a table. Or else, the data values are grouped into the quantity’s intervals, which form classes, and their respective frequencies are known. That is, the data values are distributed over different categories or classes. This is known as frequency distribution.
When such a data set is encountered,...
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Frequency Response of BJT01:24

Frequency Response of BJT

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The frequency response of a Bipolar Junction Transistor (BJT) in a common-emitter configuration is critical to its functionality, especially in applications involving amplification of alternating current (AC) signals. This response can be analyzed through low-frequency and high-frequency equivalent circuits, considering various internal parameters and external conditions.
Low-Frequency Response: At low frequencies, the behavior of the BJT is determined by its DC bias point, which is set by the...
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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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電気光学周波数コンブ

Alfredo Rueda1,2,3,4,5,6, Florian Sedlmeir1,2, Madhuri Kumari5,6

  • 1Max Planck Institute for the Science of Light, Erlangen, Germany.

Nature
|April 19, 2019
PubMed
まとめ
この要約は機械生成です。

高速光通信用の新型電気光学周波数コンブを開発した. このコンパクトな装置は低電力で動作し,現在のデータ伝送技術の限界を克服します.

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

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関連する実験動画

Last Updated: Jan 26, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Published on: June 8, 2018

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Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
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科学分野:

  • 光学について
  • 光学通信
  • 非線形光学

背景:

  • 高速光通信は波長分割マルチプレキシングに依存し,光ファイバーの非線形性と高エネルギー消費による制限に直面しています.
  • 現在の光学周波数はしばしば不安定で,狭い動作範囲に限定され,実用的な適用を妨げています.

研究 の 目的:

  • 高速光通信用のコンパクトで統合され,高品質でコヒーレントな周波数カムジェネレーターを開発する.
  • 通信ファイバーの光学非線形性によって課される電力制限を克服する.

主な方法:

  • 高品質の囁きガレリアモードの共鳴器の中で 電気光学効果を利用して ブロードバンド周波数を生成しました
  • Kerrの非線形性よりも効率的な二次非線形効果を用いた.
  • 固定されたマイクロ波信号と光学ポンプ信号を混ぜて,正確なキャリア分離を持つ一貫した周波数を作り出します.

主要な成果:

  • 低マイクロ波と光学パワーで動作するブロードバンド周波数を実証した.
  • 商用機器より3度低いマイクロ波のパワーを使えます.
  • 光通信における重要な課題に取り組むため,一貫した周波数を生成するための実用的なソリューションを開発しました.

結論:

  • 開発された電気光学周波数は高速データ通信のための有望な解決策を提供します.
  • デバイスの低電力消費とコンパクトで統合された性質は,実際の通信アプリケーションに適しています.
  • この研究は,光通信技術の進歩に不可欠な要素を提供します.