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関連する概念動画

Feedback Loops01:01

Feedback Loops

64.1K
In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
64.1K
Positive and Negative Feedback Loops01:18

Positive and Negative Feedback Loops

24.7K
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires  maintaining an internal dynamic equilibrium:
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Root Loci for Positive-Feedback Systems01:23

Root Loci for Positive-Feedback Systems

323
The Hartley oscillator is a positive feedback system that sustains oscillations by feeding the output back to the input in phase, thereby reinforcing the signal. Positive feedback systems can be viewed as negative feedback systems with inverted feedback signals. In these systems, the root locus encompasses all points on the s-plane where the angle of the system transfer function equals 360 degrees.
The construction rules for the root locus in positive feedback systems are similar to those in...
323
Cell Signaling Feedback Loops01:07

Cell Signaling Feedback Loops

7.3K
Positive and negative feedback loops are crucial for regulating biological signaling systems. These feedback loops are processes that connect output signals to their inputs.
Negative feedback loops
Most signaling systems have negative feedback loops that can perform different functions such as output limiter, and adaptation.
Output limiter
Upon receiving an input signal, the cellular response rapidly increases until a threshold is reached. Beyond this threshold, a negative feedback loop...
7.3K
Effects of feedback01:24

Effects of feedback

991
Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
991
Control System Problem01:21

Control System Problem

404
In an open-loop system, such as a basic thermostat, the poles of the transfer function influence the system's response but do not determine its stability. However, when feedback is introduced to form a closed-loop system, such as an advanced thermostat that adjusts heating based on room temperature, stability is governed by the new poles of the closed-loop transfer function.
When forming a closed-loop system, issues can arise if the poles cross into the unstable region, leading to potential...
404

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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

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ハイドラゾンのスイッチベースのネガティブフィードバックループ

Susnata Pramanik1, Ivan Aprahamian1

  • 1Department of Chemistry, Dartmouth College , Hanover, New Hampshire 03755, United States.

Journal of the American Chemical Society
|December 10, 2016
PubMed
まとめ
この要約は機械生成です。

新しいネガティブなフィードバックループは,ヒドラゾンスイッチの調整結合デプロトネーション (CCD) を使用して開発されました. このシステムは過剰な亜鉛イオンを隔離し,効果的に自体をオフにします.

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Generation and Long-term Maintenance of Nerve-free Hydra
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関連する実験動画

Last Updated: Jan 15, 2026

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
06:45

Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator

Published on: October 28, 2022

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Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch
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Determination of the Photoisomerization Quantum Yield of a Hydrazone Photoswitch

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Generation and Long-term Maintenance of Nerve-free Hydra
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科学分野:

  • 化学工学
  • 超分子化学
  • センサー技術

背景:

  • ネガティブなフィードバックループは 化学的プロセスを制御するために不可欠です
  • ハイドラゾンの化学は 分子設計のための多用途のプラットフォームを提供します
  • メタルイオンの検知と封じ込めは重要な課題です

研究 の 目的:

  • 新しいネガティブなフィードバックループのメカニズムを開発する.
  • フィードバック制御のために調整結合デプロトネーション (CCD) を利用する.
  • ダイナミックな亜鉛イオン管理システムを構築する

主な方法:

  • ハイドラゾンベースの分子スイッチの設計と合成
  • 亜鉛によって誘発される協調結合脱プロトン化 (CCD) の調査.
  • イミンの形成と亜鉛の封じ込めにつながるカスケード反応の特徴.

主要な成果:

  • CCDに基づく機能的なネガティブフィードバックループが成功しました.
  • このシステムは,亜鉛 (II) の値を超えたカスケード反応を効果的に誘発する.
  • イミンは余分な亜鉛を分離し,プロセスを停止します.

結論:

  • 開発されたヒドラゾーンスイッチは,負のフィードバック制御のための堅牢なプラットフォームを提供します.
  • このシステムは,亜鉛の濃度に対して効率的な自己調節を示す.
  • このアプローチはスマート・マテリアルと 化学センシングの分野にも応用できます