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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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Collisions in Multiple Dimensions: Problem Solving01:06

Collisions in Multiple Dimensions: Problem Solving

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In multiple dimensions, the conservation of momentum applies in each direction independently. Hence, to solve collisions in multiple dimensions, we should write down the momentum conservation in each direction separately. To help understand collisions in multiple dimensions, consider an example.
A small car of mass 1,200 kg traveling east at 60 km/h collides at an intersection with a truck of mass 3,000 kg traveling due north at 40 km/h. The two vehicles are locked together. What is the...
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Collisions in Multiple Dimensions: Introduction01:05

Collisions in Multiple Dimensions: Introduction

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It is far more common for collisions to occur in two dimensions; that is, the initial velocity vectors are neither parallel nor antiparallel to each other. Let's see what complications arise from this. The first idea is that momentum is a vector. Like all vectors, it can be expressed as a sum of perpendicular components (usually, though not always, an x-component and a y-component, and a z-component if necessary). Thus, when the statement of conservation of momentum is written for a...
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Elastic Collisions: Case Study01:15

Elastic Collisions: Case Study

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Elastic collision of a system demands conservation of both momentum and kinetic energy. To solve problems involving one-dimensional elastic collisions between two objects, the equations for conservation of momentum and conservation of internal kinetic energy can be used. For the two objects, the sum of momentum before the collision equals the total momentum after the collision. An elastic collision conserves internal kinetic energy, and so the sum of kinetic energies before the collision equals...
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Two-Dimensional Force System: Problem Solving01:29

Two-Dimensional Force System: Problem Solving

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Solving problems related to two-dimensional force systems is an essential aspect of mechanics and engineering. By applying the principles of vector analysis and force equilibrium, one can determine the effect of multiple forces acting on an object in a two-dimensional space.
The first step to solving a two-dimensional force system problem is to draw a free-body diagram of the object under consideration. This diagram helps identify all the external forces acting on the object, including their...
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Manipulation and Analysis01:21

Manipulation and Analysis

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GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
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相关实验视频

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Operation of the Collaborative Composite Manufacturing CCM System
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船舶航线规划基于对撞风险函数的改进的多级A*算法.

Chunyu Song1, Teer Guo1, Jianghua Sui2

  • 1Navigation and Ship Engineering College, Dalian Ocean University, 116023, Dalian, China.

Scientific reports
|December 5, 2024
PubMed
概括

这项研究介绍了一种改进的A*算法,用于在复杂水域中更安全地导航船只. 改进的算法通过结合碰撞风险评估来减少规划时间和路径长度.

科学领域:

  • 海事工程是海事工程.
  • 人工智能的人工智能
  • 导航系统 导航系统

背景情况:

  • 在复杂的海域中船舶航行带来了重大的安全和效率挑战.
  • 传统的路径规划算法经常与动态风险评估和计算负载作斗争.

研究的目的:

  • 开发一种改进的A*算法,用于在复杂的海上环境中进行最佳和安全的船舶航线规划.
  • 通过整合碰撞风险评估来提高路线规划效率.

主要方法:

  • 开发了一种改进的A*算法,结合了碰撞风险函数以优化节点成本.
  • 多尺度的图和视线 (LOS) 算法被用于海图划分和曲的路径缓解.
  • 该算法通过模拟在复杂的舟山群岛海域进行了测试.

主要成果:

  • 改进的A*算法显示,路径规划时间减少了30%,扩展节点减少了11%.
  • 与原始算法相比,路径长度减少了5.8%.
  • 改进的算法有效地平衡了路径长度和碰撞风险,提高了整体规划质量.

结论:

  • 建议改进的A*算法为复杂海域的智能船只提供了更有效和更安全的航线规划策略.
关键词:
碰撞风险功能 碰撞风险功能改进了A*算法多尺度的海上地图.最佳路径规划的最佳路径规划在复杂的海域航行安全.

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  • 这种方法显著降低了计算负担,使其适合实时应用.
  • 该研究为先进的自主导航系统提供了科学基础.