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相关概念视频

Group Polarization01:01

Group Polarization

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Group polarization is the strengthening of an original group attitude following the discussion of views within a group (Teger & Pruitt, 1967). That is, if a group initially favors a viewpoint, after discussion the group consensus is likely a stronger endorsement of the viewpoint. Conversely, if the group was initially opposed to a viewpoint, group discussion would likely lead to stronger opposition.
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Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

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A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
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¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

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When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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Dielectric Polarization in a Capacitor01:31

Dielectric Polarization in a Capacitor

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The presence of a dielectric medium in a capacitor not only changes the voltage and capacitance but also affects the electric field. In general, dielectrics can be of two types: polar and nonpolar. In a polar dielectric, the positive and negative charges in the molecules are separated by a distance and hence have a permanent dipole moment. In contrast, no such charge separation exists in a nonpolar dielectric, however the nonpolar molecules get polarized in the presence of an external electric...
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Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

1.1K
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
1.1K
Curvilinear Motion: Polar Coordinates01:27

Curvilinear Motion: Polar Coordinates

1.1K
In polar coordinates, the motion of a particle follows a curvilinear path. The radial coordinate symbolized as 'r,' extends outward from a fixed origin to the particle, while the angular coordinate, 'θ,' measured in radians, represents the counterclockwise angle between a fixed reference line and the radial line connecting the origin to the particle.
The particle's location is described using a unit vector along the radial direction. Deriving the particle's position...
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采用极化代码进行全息数据存储.

Hongjie Liu, Shujun Zheng, Xueyan Chen

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    此摘要是机器生成的。

    本研究介绍了一种全息数据存储 (HDS) 的新方法,在单个数据页面上使用多个极化状态. 这一进步简化了系统设计,并为高密度存储应用程序增强了数据编码.

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    Recording Ultra-Realistic Full-Color Analog Holograms for Use in a Moving Hologram Display
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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 数据存储技术 数据存储技术

    背景情况:

    • 目前的全息数据存储 (HDS) 主要使用振幅和相位调制.
    • 在HDS中,极化通常仅限于多通道复杂化,导致系统复杂性和运营挑战.

    研究的目的:

    • 提出并验证一种新的方法,用于在HDS中单个数据页中使用多个极化状态来编码数据.
    • 通过集成偏振编码来简化HDS系统设计和降低操作复杂性.

    主要方法:

    • 开发了基于偏振全息理论的重建方法,以准确解码具有多种偏振信息的数据页面.
    • 在单个页面上直接通过多个极化状态实现数据编码.
    • 通过在摄像头前使用单个45°线性偏振器来简化解码,以实现高效的偏振状态区分.

    主要成果:

    • 成功演示了2-,3-和4-级极化数据页的零错误解码.
    • 验证了拟议的重建和解码方法的有效性.
    • 展示了在一页上使用多个极化状态直接编码数据的能力.

    结论:

    • 拟议的方法简化了HDS系统设计,减少了操作复杂性.
    • 这项研究扩大了HDS的编码维度,为实际的高密度全息存储铺平了道路.
    • 为推进全息数据存储能力提供了一种新的技术方法.