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相关概念视频

State Space to Transfer Function01:21

State Space to Transfer Function

245
The conversion of state-space representation to a transfer function is a fundamental process in system analysis. It provides a method for transitioning from a time-domain description to a frequency-domain representation, which is crucial for simplifying the analysis and design of control systems.
The transformation process begins with the state-space representation, characterized by the state equation and the output equation. These equations are typically represented as:
245
Transfer Function to State Space01:23

Transfer Function to State Space

310
State-space representation is a powerful tool for simulating physical systems on digital computers, necessitating the conversion of the transfer function into state-space form. Consider an nth-order linear differential equation with constant coefficients, like those encountered in an RLC circuit. The state variables are selected as the output and its n−1 derivatives. Differentiating these variables and substituting them back into the original equation produces the state equations.
In an...
310
Shunt Admittances01:26

Shunt Admittances

153
Shunt admittances play a crucial role in the analysis of transmission lines, particularly for three-phase systems with neutral conductors. When a uniformly charged conductor is positioned above the Earth, it induces an equal but opposite charge on its surface. This interaction creates electric field lines between the conductor and the Earth.
To model this effect, the method of images is employed. This method involves replacing the Earth with an image conductor that mirrors the original...
153
Transmission-Line Differential Equations01:26

Transmission-Line Differential Equations

351
Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured...
351
Two-Dimensional Force System01:20

Two-Dimensional Force System

953
A two-dimensional system in mechanical engineering involves the analysis of motion and forces in a plane. A two-dimensional force vector can be resolved into its components as:
953
Mason's Rule01:20

Mason's Rule

391
Mason's rule is a powerful tool in control systems and signal processing. It simplifies the calculation of transfer functions from signal-flow graphs. This method leverages various elements, including loop gains, forward-path gains, and non-touching loops, to determine the transfer function efficiently.
Loop gain is determined by identifying and tracing a path from a node back to itself. This involves computing the product of branch gains along the loop. Each loop's gain is crucial for...
391

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相关实验视频

Updated: Jul 26, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

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转移矩阵在1D的迪拉克类问题.

M Ibarra-Reyes1, R Pérez-Álvarez2, I Rodríguez-Vargas1

  • 1Unidad Académica de Ciencia y Tecnología de la Luz y la Materia, Universidad Autónoma de Zacatecas, Circuto Marie Curie S/N, Parque de Ciencia y Tecnología QUANTUM Ciudad del Conocimiento, 98160 Zacatecas, Zacatecas, Mexico.

Journal of physics. Condensed matter : an Institute of Physics journal
|June 19, 2023
PubMed
概括
此摘要是机器生成的。

转移矩阵方法揭示了1D迪拉克式系统的关键性质,比如石墨烯. 它证明了约束状态和完美的传输之间的联系,适用于2D材料.

关键词:
1D 迪拉克类问题边界国家 边界国家完美的传输状态的状态.转移矩阵是一个转移矩阵.

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相关实验视频

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科学领域:

  • 凝聚物质物理学 凝聚物质物理学
  • 材料科学 材料科学 材料科学
  • 量子力学就是量子力学.

背景情况:

  • 转移矩阵方法是分析一维量子系统的强大工具.
  • 单层石墨烯表现出独特的1D迪拉克式电子特性.
  • 了解传输和边界状态对于电子设备应用至关重要.

研究的目的:

  • 将转移矩阵方法应用于单层石墨烯中的1D迪拉克类问题.
  • 分析类似迪拉克的系统与类似施罗丁格的系统的转移矩阵的特征.
  • 导出传递系数和束状态的分析表达式.

主要方法:

  • 使用转移矩阵方法用于1D迪拉克类系统.
  • 分析转移矩阵的数学属性.
  • 导出传输和绑定状态的分析公式.
  • 研究电子状态在潜在障碍物的行为.

主要成果:

  • 获得了传递系数和束状态的分析表达式.
  • 对迪拉克类系统的转移矩阵进行了表征,并与施罗丁格类系统进行了对比.
  • 在约束状态和完美传输状态之间证明了一般的连续性.
  • 这种连续性特别适用于石墨烯中的单个静电屏障.

结论:

  • 转移矩阵方法有效地描述了1D迪拉克类系统.
  • 建立了对约束状态和完美的传输的统一理解.
  • 这些发现可扩展到其他二维材料,如和过渡金属二二基化物.