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相关概念视频

Rapidly Varying Flow01:24

Rapidly Varying Flow

107
Rapidly varying flow (RVF) in open channels is characterized by abrupt changes in flow depth over a short distance, with the rate of depth change relative to distance often approaching unity. These flows are inherently complex due to their transient and multi-dimensional nature, making exact analysis difficult. However, approximate solutions using simplified models provide valuable insights into their behavior.Key Features of Rapidly Varying FlowRVF is commonly observed in scenarios involving...
107
Design Example: Design of an Irrigation Channel01:27

Design Example: Design of an Irrigation Channel

148
Trapezoidal channels are widely used in irrigation systems due to their cost-effectiveness and efficiency in conveying water. Trapezoidal channels feature a flat bottom and sloping sides, making them stable and easier to construct compared to other shapes. The bottom width and side slope ratio are determined based on the required flow capacity and site conditions. The side slope is kept gentle for unlined channels to prevent soil erosion.Hydraulic parameters in channel design include the flow...
148
Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

75
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...
75
Uniform Depth Channel Flow: Problem Solving01:18

Uniform Depth Channel Flow: Problem Solving

97
To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...
97
Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

76
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...
76
Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

84
Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
84

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相关实验视频

Updated: Jul 29, 2025

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
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一个改进的盲区道化结构和快速实施方法.

Ziliang Jia1, Hongxia Liu1

  • 1Key Laboratory for Wide Band Gap Semiconductor Materials and Devices of Education Ministry, School of Microelectronics, Xidian University, Xi'an 710071, China.

Micromachines
|May 27, 2023
PubMed
概括

本研究介绍了宽带数字接收器的改进道结构,以减少错误信号和道模两可. 在FPGA上实施的增强设计提高了实时性能和硬件开发效率.

科学领域:

  • 电气工程 电气工程
  • 数字信号处理 数字信号处理

背景情况:

  • 宽带数字接收器面临着错误信号和道模两可的挑战.
  • 现有的道结构可能会导致盲区区域的接收错误.
  • 有效的硬件实现对于实时信号处理至关重要.

研究的目的:

  • 为宽带数字接收器提出一个改进的设计.
  • 为了提高信号捕获概率和实时性能.
  • 为了加速数字接收器的硬件开发周期.

主要方法:

  • 开发了一种改进的联合决策道结构,以减少道模两可.
  • 来自Xilinx的高层合成 (HLS) 工具被用于算法实现.
  • 应用了管道和循环并行技术,以最大限度地减少系统延迟.
  • 完整的系统是在一个可编程门阵列 (FPGA) 上实现的.

主要成果:

  • 拟议的联合决策道结构有效地消除了道模两可.
  • 使用HLS和优化技术显著提高了算法实现速度.
  • 该FPGA实现满足了性能和效率的所有指定的设计要求.
  • 改进的设计证明了信号捕获概率和实时能力的提高.
关键词:
数字化道化的数字化道化高水平的合成.一个共同的决定决定.多相过的过方法

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相关实验视频

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结论:

  • 增强的宽带数字接收器设计成功地解决了频道模糊性和错误信号问题.
  • 使用HLS和FPGA实现加速了开发并提高了实时性能.
  • 这项工作为提高数字接收器的效率和可靠性提供了强大的解决方案.