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関連する概念動画

Polymer Classification: Architecture01:14

Polymer Classification: Architecture

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Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...
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Vascular plants, which account for over 90% of the Earth’s vegetation, all undergo primary growth—which lengthens roots and shoots. Many land plants, notably woody plants, also undergo secondary growth—which thickens roots and shoots.
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If in an experiment, data values have a probability of being both positive and negative, neither the arithmetic mean, the geometric mean, nor the harmonic mean can be used to calculate the central tendency of the data set. In particular, if the positive and negative values are equally likely, the arithmetic mean is close to zero.
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Properties of the Root Locus01:05

Properties of the Root Locus

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The root locus method is an invaluable tool for analyzing higher-order systems without needing to factor the denominator of the transfer function. A pole of the system is identified when the characteristic polynomial in the transfer function's denominator equals zero.
To determine if a point lies on the root locus, the criterion involves the sum of angles contributed by all poles and zeros to that point. Specifically, this sum must be an odd multiple of 180 degrees. The gain at any point on...
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Root-Locus Method

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A cruise control system in a car is designed to maintain a specified speed automatically by adjusting the gas pedal. The system continuously measures the vehicle's speed and makes fine adjustments to the pedal to achieve this goal. The root locus method is particularly useful for understanding how the cruise control system's behavior changes under varying conditions, such as when the car goes uphill, downhill, or faces strong wind resistance.
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Construction of Root Locus01:15

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The construction of a root locus involves several key steps to analyze and visualize the behavior of a system's poles with varying gain. The number of branches in the root locus equals the number of closed-loop poles and is symmetrical about the real axis.
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Updated: Feb 5, 2026

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Root Microbiota: Orchestrating Architecture-Smart Crops

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まとめ
この要約は機械生成です。

根圏微生物群集の理解

キーワード:
シクロ(ロイシン-プロリン)構造作物構造根圏微生物群集ストリゴラクトン

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科学分野:

  • 農業微生物学; 植物科学; 微生物生態学

背景:

  • 作物は成長と回復力のために微生物群集に依存している。
  • 根圏微生物群集は植物の発達において重要な役割を果たしている。
  • これらの相互作用を理解することは、持続可能な農業にとって不可欠である。

研究 の 目的:

  • イネの分げつ数を制御する上での根圏微生物群集の役割を強調すること。
  • 作物改良のための「ホロビオント構造」という概念を提唱すること。
  • 適応性のある作物を育種するための微生物オーケストレーションを探求すること。

主な方法:

  • 根圏微生物群集がイネの植物構造に与える影響を調査した。
  • 作物育種における「ホロビオント構造」の概念を分析した。
  • 表現型の可塑性のための微生物による微調整について論じた。

主要な成果:

  • 根圏微生物群集はイネの分げつ数を直接制御し、収量に影響を与える。;微生物の影響は、作物構造における遺伝学を超えた新しい視点を提供する。;微生物のオーケストレーションにより、適応形質の育種が可能になる。

結論:

  • 将来の作物生産の鍵は、「ホロビオント構造」に焦点を移すことである。
  • 微生物応用は、「構造スマート作物」の育種のための動的な微調整を提供する。
  • 微生物相互作用による表現型の可塑性は、環境変化に対する作物の回復力を高める。