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Shearing Stresses in a Beam: Problem Solving01:14

Shearing Stresses in a Beam: Problem Solving

188
A cantilever beam with a rectangular cross-section under distributed and point loads experiences shearing stresses. The analysis begins by identifying the loads acting on the beam. Then, the reactions at the beam's fixed end are calculated using equilibrium equations. The vertical reaction is a combination of the distributed and point loads, while the moment reaction is the sum of their moments. The shear force distribution along the beam, resulting from these loads, is established by...
188
Beams with Symmetric Loadings01:15

Beams with Symmetric Loadings

190
The moment-area method is an analytical tool used in structural engineering to determine the slope and deflection of beams under various loads. Consider a cantilever with a concentrated load and moment at the free end. The first step is constructing a free-body diagram to calculate the reactions at the fixed end. Next, the bending moment diagram is plotted to visualize how the bending moment varies along the beam's length, focusing on points where the bending moment equals zero.
The M/EI...
190
Beams with Unsymmetric Loadings01:17

Beams with Unsymmetric Loadings

120
Analyzing a supported beam under unsymmetrical loadings is essential in structural engineering to understand how beams respond to varied force distributions. This analysis involves calculating the deflection and identifying points where the slope of the beam is zero, which are crucial for ensuring structural stability and functionality.
The first moment-area theorem determines the slope at any point on the beam. This theorem indicates that the change in slope between two points on a beam...
120
Prismatic Beams: Problem Solving01:15

Prismatic Beams: Problem Solving

111
In the design of a supported timber beam subjected to a distributed load, both the beam's physical dimensions and the timber's characteristics, such as its grade and species, are critical. These factors determine the allowable stress values, which are crucial for calculating the necessary beam depth to ensure structural integrity and safety.
The design begins with analyzing the beam as a free body to identify moments and force balances, thereby determining support reactions. Next, the...
111
Deflection of a Beam01:19

Deflection of a Beam

263
Accurately determining beam deflection and slope under various loading conditions in structural engineering is crucial for ensuring safety and structural integrity. Singularity functions offer a streamlined approach to analyzing beams, especially when multiple loading functions complicate the bending moment equation.
Singularity functions, described in an earlier lesson, are powerful mathematical tools that represent discontinuities within a function commonly encountered in structural loading...
263
Deformation of a Beam under Transverse Loading01:15

Deformation of a Beam under Transverse Loading

292
Understanding beam deflection, particularly for indeterminate beams with overhanging segments and multiple concentrated loads, is crucial for ensuring structural integrity and functionality. The process begins with constructing an accurate free-body diagram, which helps identify the forces and moments acting on the beam. This diagram is vital for visualizing how bending moments vary along the beam's length, influencing its curvature.
The insights from the bending moment diagram extend to...
292

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相关实验视频

Updated: Jul 3, 2025

X-ray Beam Induced Current Measurements for Multi-Modal X-ray Microscopy of Solar Cells
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在V2I通信中基于强化学习的联合光束宽度和光束对齐间隔优化.

Jihun Lee1, Hun Kim1, Jaewoo So1

  • 1Department of Electronic Engineering, Sogang University, Seoul 04107, Republic of Korea.

Sensors (Basel, Switzerland)
|February 10, 2024
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种强化学习 (RL) 方法,用于优化5G车辆通信中的光束成形. 通过智能地管理天线光束宽度和光束对齐间隔,RL方案提高了平均吞吐量和链路稳定性.

关键词:
天线光束宽度天线光束宽度光束对齐间隔的时间间隔.梁线对齐在头顶上的位置.强化学习是一种强化学习.车辆通讯工具 车辆通讯工具

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科学领域:

  • 无线通信是一种无线通信.
  • 天线理论天线理论
  • 机器学习是机器学习.

背景情况:

  • 5G车辆通信需要高数据速率,通常使用定向天线和光束成形.
  • 波束成形需要精确的波束对齐,导致显著的信号空头.
  • 优化光束宽度和对齐间隔对于平衡吞吐量和开销至关重要.

研究的目的:

  • 为车辆到基础设施 (V2I) 系统开发一个优化的光束成形策略.
  • 为了共同确定最佳的天线光束宽度和光束对齐间隔.
  • 为了最大限度地提高系统吞吐量,同时最大限度地减少信号开销.

主要方法:

  • 提出了一个基于强化学习 (RL) 的梁成型方案.
  • 该RL代理共同优化天线光束宽度和光束对齐间隔.
  • 该计划考虑了决策的过去和未来奖励.

主要成果:

  • 拟议的基于RL的联合光束成形方案明显优于传统方法.
  • 在平均吞吐量方面取得了明显的改善.
  • 展示了增强的平均链路稳定率.

结论:

  • 基于RL的联合优化有效地解决了V2I通信中吞吐量和信号开销之间的权衡.
  • 这种方法为高效的5G车辆通信系统提供了卓越的解决方案.
  • 拟议的方法提高了数据传输速率和连接可靠性.