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相关概念视频

Ampere-Maxwell's Law: Problem-Solving01:17

Ampere-Maxwell's Law: Problem-Solving

550
A parallel-plate capacitor with capacitance C, whose plates have area A and separation distance d, is connected to a resistor R and a battery of voltage V. The current starts to flow at t = 0. What is the displacement current between the capacitor plates at time t? From the properties of the capacitor, what is the corresponding real current?
To solve the problem, we can use the equations from the analysis of an RC circuit and Maxwell's version of Ampère's law.
For the first part of...
550
Transmission Line Design Considerations01:23

Transmission Line Design Considerations

123
Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
123
Bus Impedance Matrix01:24

Bus Impedance Matrix

106
Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
106
Maximum Power Flow and Line Loadability01:23

Maximum Power Flow and Line Loadability

95
The maximum power flow for lossy transmission lines is derived using ABCD parameters in phasor form. These parameters create a matrix relationship between the sending-end and receiving-end voltages and currents, allowing the determination of the receiving-end current. This relationship facilitates calculating the complex power delivered to the receiving end, from which real and reactive power components are derived.
95
Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

711
In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
711
Maximum Power Transfer01:16

Maximum Power Transfer

231
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
231

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相关实验视频

Updated: Jun 8, 2025

Fabrication of a Multiplexed Artificial Cellular MicroEnvironment Array
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硬件友好的基于网格的Sparse MIMO数组的多目标设计和优化.

Suleyman Gokhun Tanyer1,2,3, Paul Dent4, Murtaza Ali4

  • 1MulticoreWare Inc., #228, 4010 Moorpark Ave., San Jose, CA 95117, USA.

Sensors (Basel, Switzerland)
|November 9, 2024
PubMed
概括

本研究介绍了一个设计框架,用于优化稀疏的多输入,多输出 (MIMO) 数组,以更好地检测多目标. 该框架提高了用于雷达应用的天线效率和性能指标.

关键词:
适应性的可取性函数.阵列设计和优化的设计和优化.格子叶片自由阵列 格子叶片自由阵列基于网格的稀疏MIMO数组.机器学习是机器学习.减轻相互合的作用.侧叶片减少 侧叶片减少

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相关实验视频

Last Updated: Jun 8, 2025

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科学领域:

  • 阵列信号处理 阵列信号处理
  • 雷达系统工程 雷达系统工程
  • 电磁学 电磁学 电磁学 电磁学

背景情况:

  • 优化稀疏的天线阵列对于先进的雷达系统至关重要.
  • 现有的设计经常面临相互合和性能限制的挑战.

研究的目的:

  • 为优化稀疏多输入,多输出 (MIMO) 数组提出一个全面的设计框架.
  • 增强多目标检测能力和天线资源利用.

主要方法:

  • 在稀疏数组中开发策略以最大限度地减少元素间的相互合.
  • 探索基于网格的稀疏阵列 (GBSA) 配置和部分元素共享.
  • 介绍虚拟光圈和光束宽度损失的性能指标.
  • 使用机器学习初始化方法实现快速融合.

主要成果:

  • 证明了增强的角度光束成形指标 (光束宽度,PSLR,视野).
  • 通过使用可取性函数,在各种操作模式中展示了更好的性能.
  • 通过模拟和测量验证了框架的有效性,超过了统一的阵列.

结论:

  • 拟议的框架为网格间隔的稀疏数组提供了卓越的效率和硬件适用性.
  • 有效的稀疏阵列处理对于多目标场景至关重要.
  • 该框架为雷达应用提供了显著的优势.