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相关概念视频

Estimation of the Physical Quantities01:05

Estimation of the Physical Quantities

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On many occasions, physicists, other scientists, and engineers need to make estimates of a particular quantity. These are sometimes referred to as guesstimates, order-of-magnitude approximations, back-of-the-envelope calculations, or Fermi calculations. The physicist Enrico Fermi was famous for his ability to estimate various kinds of data with surprising precision. Estimating does not mean guessing a number or a formula at random. Instead, estimation means using prior experience and sound...
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Design Example: Measuring Distance Between Two Points with Obstructions01:10

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When measuring distances in areas with physical obstructions, such as a lake in a field, surveyors must employ techniques to calculate accurate lengths without direct line measurements. One effective method is the offset technique, which allows for precise distance estimation over inaccessible stretches.In this scenario, a surveyor must measure a side of an area that crosses a lake. Since the measuring tape cannot span the lake, the surveyor begins by establishing a baseline that aligns with...
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Three-Dimensional Force System:Problem Solving01:30

Three-Dimensional Force System:Problem Solving

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A three-dimensional force system refers to a scenario in which three forces act simultaneously in three different directions. This type of problem is commonly encountered in physics and engineering, where it is necessary to calculate the resultant force on the system, which can then be used to predict or analyze the behavior of the object or structure under consideration.
To solve a three-dimensional force system, first resolve each force into its respective scalar components. Do this using...
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Design Example: Dimensioning of Concrete Masonry Construction01:13

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For the construction of a storeroom using concrete masonry units, it's essential to align the dimensions of the structure with the actual sizes of the blocks and the intended mortar joints. On the site in question, there's a stockpile of concrete masonry blocks with a nominal size of eight by eight by sixteen inches, which are to be used in the construction of the storeroom.
The site engineer has laid out a plan for the storeroom with external dimensions of twelve feet in length and...
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Collisions in Multiple Dimensions: Problem Solving01:06

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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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基于紧的高层次表示的快速3D房间布局估计.

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    此摘要是机器生成的。

    这项研究引入了一种新的,更快速的方法,用于从单个图像中估计3D房间布局. 它使用紧的,高层次的表示来高效地重建3D结构.

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    科学领域:

    • 计算机视觉 计算机视觉
    • 三维重建的3D重建
    • 机器学习 机器学习

    背景情况:

    • 目前用于3D房间布局估计的深度学习方法通常依赖于高分辨率的2D表示.
    • 这些表示可以导致冗余的信息,高内存使用量和增加的运行时间,阻碍实际应用.

    研究的目的:

    • 从室内RGB图像开发一种更有效的3D房间布局估计方法.
    • 与现有方法相比,减少计算复杂性和内存消耗.

    主要方法:

    • 使用通用回归网络学习一个由29个实数组成的小说紧的高层次表示.
    • 这种表示包括实例智能平面参数,相机内在参数和平面位置指示器.
    • 无序损失函数旨在训练具有弱2D或完全3D监控的模型,使得平面参数和位置的联合学习,以改进3D推理.

    主要成果:

    • 与现有的3D房间布局估计技术相比,拟议的方法显著减少了运行时间.
    • 它在基准数据集上实现了竞争性表现,证明了其有效性.
    • 该方法显示了实时室内场景理解应用的潜力.

    结论:

    • 学习的紧的高层次表示为3D空间布局估计提供了更有效的替代方案.
    • 该方法的速度和竞争力的准确性使其适合实时应用.
    • 这项工作通过从单个图像中实现更快,更实用的3D重建,推动了该领域的发展.