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相关概念视频

Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

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The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
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Transmission Line Design Considerations01:23

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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...
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Boundary Conditions: Lossless Lines01:21

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Consider a single-phase, two-wire, lossless transmission line terminated by an impedance at the receiving end and a source with Thevenin voltage and impedance at the sending end. The line, with length, has a surge impedance and wave velocity determined by the line's inductance and capacitance.
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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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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.
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Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...
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相关实验视频

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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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跨境波罗的海走廊的成本高效网络规划-一项研究

Osama Elgarhy1, Muhammad Mahtab Alam1, Anet Tammets1

  • 1Thomas Johann Seebeck Department of Electronics, Tallinn University of Technology (TalTech), Ehitajate tee 5, 19086 Tallinn, Estonia.

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概括

这项研究模拟了波罗的海国家跨境运输走廊的5G网络覆盖范围,解决了法律挑战和基础设施需求. 结果估计了沿着关键路线的无5G服务所需的新站点.

关键词:
5G覆盖范围的覆盖范围5G网络中的5G网络.连接和自动化的移动性.跨境服务是跨境服务.

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科学领域:

  • 电信工程 电信工程 电信工程
  • 跨境网络规划 跨境网络规划
  • 无线通信系统无线通信系统

背景情况:

  • 跨境5G部署面临法律和监管障碍.
  • 像Via Baltica和Rail Baltica这样的运输走廊需要无连接.
  • 现有的基础设施和频谱分配影响5G服务的可行性.

研究的目的:

  • 为主要波罗的海运运输走廊建模和规划5G无线电频率 (RF) 网络覆盖范围.
  • 确定跨境5G服务的法律,基础设施和频谱要求.
  • 为了估计新站点的数量和部署的时间表.

主要方法:

  • 波罗的海国家和欧洲的利益相关者识别和采访.
  • 分析法律行为和电子通信法规.
  • 射频网络建模,包括被动和主动基础设施评估.
  • 对700 MHz和3500 MHz频段的频谱分析.

主要成果:

  • 拟议的5G网络要求和基础设施概述.
  • 对5G现有和需要的被动/主动基础设施进行分析.
  • 覆盖范围规划结果显示了无中断5G所需的新站点数量.
  • 新工地建设的估计时间表.

结论:

  • 成功跨境部署5G需要解决法律框架和基础设施缺口.
  • 射频网络建模为将5G扩展到关键运输走廊提供了路线图.
  • 战略站点规划和频谱利用是实现无跨境5G服务的关键.