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相关概念视频

Frequency-Domain Interpretation of PD Control01:24

Frequency-Domain Interpretation of PD Control

375
Proportional-Derivative (PD) controllers are widely used in fan control systems to improve stability and performance. A fan control system can be effectively represented using a Bode plot to illustrate the impact of a PD controller through its transfer function. The Bode plot visually conveys how PD control modifies the fan's response across various frequencies, providing a frequency domain interpretation of the controller's behavior.
The proportional control gain, combined with the...
375
Time-Domain Interpretation of PD Control01:07

Time-Domain Interpretation of PD Control

406
Proportional-Derivative (PD) control is a widely used control method in various engineering systems to enhance stability and performance. In a system with only proportional control, common issues include high maximum overshoot and oscillation, observed in both the error signal and its rate of change. This behavior can be divided into three distinct phases: initial overshoot, subsequent undershoot, and gradual stabilization.
Consider the example of control of motor torque. Initially, a positive...
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DNA Base Pairing02:27

DNA Base Pairing

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Erwin Chargaff’s rules on DNA equivalence paved the way for the discovery of base pairing in DNA. Chargaff’s rules state that in a double-stranded DNA molecule,
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DNA Base Pairing02:27

DNA Base Pairing

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Time and frequency -Domain Interpretation of PI Control01:27

Time and frequency -Domain Interpretation of PI Control

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Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires...
413
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

454
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
454
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  3. 基于dna的纳米设备由纯粹的热链域控制
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  3. 基于dna的纳米设备由纯粹的热链域控制

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Electric-field Control of Electronic States in WS2 Nanodevices by Electrolyte Gating
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基于DNA的纳米设备由纯粹的热链域控制

Davide Mariottini1, Andrea Idili1, Minke A D Nijenhuis2

  • 1Chemistry Department , University of Rome Tor Vergata , Via della Ricerca Scientifica , 00133 Rome , Italy.

Journal of the American Chemical Society
|October 24, 2018

在PubMed 上查看摘要

概括
此摘要是机器生成的。

合成分子受体可以使用纯粹的域进行精确控制. 在基于DNA的受体中变化的链接长度通过变化来微调连接体亲和力和响应范围.

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科学领域:

  • 分子生物学
  • 生物化学
  • 材料科学

背景情况:

  • 合成分子受体对于感知和分子识别至关重要.
  • 控制受体输入/输出反应和特异性仍然是一个挑战.

研究的目的:

  • 为了证明纯粹的域的合理设计来控制合成分子受体.
  • 使用这种方法重新设计基于DNA的受体 (一种DNA结合开关和一种ATP结合的体).

主要方法:

  • 连接受体识别元件的链接域的合理设计.
  • 连接器长度的系统变化.
  • 数学建模和热力学特征.
  • 对链接器的变化和聚合物行为进行分析.

主要成果:

  • 通过调整连接器长度来微调特定连接体的受体亲和力.
  • 证明变化, 而不是, 驱动亲和度调节.
  • 将链接器描述为无序的随机卷聚合物.
  • 调节配体度范围以获得最佳的受体反应和特异性.

结论:

  • 纯粹的域为精确控制合成受体活动提供了多功能和通用策略.
  • 这种方法可以预测和控制受体性能调节.
  • 该方法适用于各种受体设计,包括基于DNA的系统.