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相关概念视频

Energy Diagrams - II01:10

Energy Diagrams - II

Energy diagrams are important to understand the dynamics of a system. The topology of an energy diagram helps illustrate the equilibrium points of the system.
The point in the energy diagram at which the system’s potential energy is the lowest is known as the local minima. The system tends to stay in this position indefinitely unless acted upon by a net force. The slope of the potential energy diagram at the local minima is zero, indicating that zero net force is acting on the system. The slope...
Reducing Line Loss01:18

Reducing Line Loss

In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
Routh-Hurwitz Criterion I01:15

Routh-Hurwitz Criterion I

Consider an electrical power grid, where stability is essential to prevent blackouts. The Routh-Hurwitz criterion is a valuable tool for assessing system stability under varying load conditions or faults. By analyzing the closed-loop transfer function, the Routh-Hurwitz criterion helps determine whether the system remains stable.
To apply the Routh-Hurwitz criterion, a Routh table is constructed. The table's rows are labeled with powers of the complex frequency variable s, starting from the...
Control of Power Flow01:30

Control of Power Flow

There are several methods to control power flow in power systems:
Zones of Protection01:16

Zones of Protection

In power systems, the entire setup is divided into protective zones to isolate faults and protect the rest of the network. These zones include generators, transformers, buses, transmission lines, distribution lines, and motors. Each zone can be visualized as a separate room in a house, with each room protected by its own circuit breaker.
Protective zones are defined by closed dashed lines, containing one or more components. A key characteristic of these zones is the strategic placement of...
Multimachine Stability01:25

Multimachine Stability

Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:

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相关实验视频

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Using the Horseshoe Crab, Limulus Polyphemus, in Vision Research
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异常固定对稳定状态图案电网红图的影响.

Evelyn B N Friedel1,2,3, Julia Haldina4, Kathrin Nickel5

  • 1Eye Center, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany. evelyn.friedel@uniklinik-freiburg.de.

Documenta ophthalmologica. Advances in ophthalmology
|February 28, 2024
PubMed
概括

适度的固定不准确性对稳定状态模式电网红图 (ssPERG) 振幅的影响最小. 然而,大型检查可能会引起亮度反应,需要在视网膜质细胞功能评估中仔细考虑.

关键词:
离心率 离心率 离心率 离心率固定方式 固定方式错误的固定方式佩尔格 (Perg) 是一个城市.图案电网红图形图形电网红图.稳定状态的PERG是一个稳定状态的PERG.

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Using the Electroretinogram to Assess Function in the Rodent Retina and the Protective Effects of Remote Limb Ischemic Preconditioning
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科学领域:

  • 眼科医生 眼科 眼科
  • 神经科学是一个神经科学.
  • 视觉心理物理学 视觉心理物理学

背景情况:

  • 稳定状态模式电网红图 (ssPERG) 对于评估视网膜质细胞功能至关重要.
  • 在一些患者和研究群体中,保持稳定的中心固定是个挑战.

研究的目的:

  • 调查固定不准确性对ssPERG响应的影响.
  • 为了确定错误固定如何影响ssPERG的棋盘刺激.

主要方法:

  • 用两个检查大小 (0.8°,15°) 和不同的固定偏差 (0°-19°水平,0°-14°对角) 记录了ssPERG反应.
  • 刺激参数包括15°的刺激区域和15/s的反转率.

主要成果:

  • 固定偏差高达~7°对ssPERG振幅的影响很小.
  • 鼻腔偏差比时间偏差有更大的影响,特别是在小检查时.
  • 截面偏差,特别是大检查,诱导了7.5赫兹的发光率响应.

结论:

  • 适度的固定错误通常不会显著改变ssPERG的振幅.
  • 在ssPERG分析过程中,必须考虑光度响应与大检查的可能性.