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相关概念视频

Depth Perception and Spatial Vision01:15

Depth Perception and Spatial Vision

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Depth perception is the ability to perceive objects three-dimensionally. It relies on two types of cues: binocular and monocular. Binocular cues depend on the combination of images from both eyes and how the eyes work together. Since the eyes are in slightly different positions, each eye captures a slightly different image. This disparity between images, known as binocular disparity, helps the brain interpret depth. When the brain compares these images, it determines the distance to an object.
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Hybrid Zones

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Hybrid zones are narrow regions where two closely related species interact, mate, and produce hybrids. Relative to either parent species, hybrids may possess distinct phenotypic or genetic differences that impact their survival and reproductive success. The genetic variances introduced by hybridization influence species diversity and speciation processes within the hybrid zone.
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The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
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sp3d and sp3d 2 Hybridization
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In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
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The International System of Units or SI system, by international agreement, has fixed measurement units for seven fundamental properties: length, mass, time, temperature, electric current, amount of substance, and luminosity. These are called the SI base units.
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hSNMF:用于图像衍生空间转录学的混合空间调节NMF.

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    科学领域:

    • 计算生物学 计算生物学
    • 基因组学就是基因组学.
    • 生物信息学是一种生物信息学.

    背景情况:

    • 高分辨率的空间转录组学平台产生复杂的,高维数据.
    • 分析这些数据以进行表示学习和集群,带来了重大的计算挑战.

    研究的目的:

    • 为了对空间转录学数据进行非负矩阵分解 (NMF) 的比较和扩展.
    • 为了改进数据分析,引入新的空间规范化的NMF变体.

    主要方法:

    • 通过因子向量扩散开发了空间NMF (SNMF) 来实现局部空间平滑.
    • 引入混合空间NMF (hSNMF),将空间规范化的NMF与莱登集群结合起来.
    • 综合空间接近性和转录组相似性使用可调的混合参数 (alpha).

    主要成果:

    • 在SNMF和hSNMF中,空间紧性得到改善 (CHAOS<0.004,莫兰的I>0.96).
    • 实现了更大的集群分离能力 (轮>0.12,DBI <1.8).
    • 与现有方法相比,显示出更高的生物连贯性 (CMC和丰富).

    结论:

    • SNMF和hSNMF为分析高维空间转录组学数据提供了有效的解决方案.
    • 这些方法提高了空间基因表达模式的生物解释性.