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相关概念视频

Propagation of Uncertainty from Random Error00:59

Propagation of Uncertainty from Random Error

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An experiment often consists of more than a single step. In this case, measurements at each step give rise to uncertainty. Because the measurements occur in successive steps, the uncertainty in one step necessarily contributes to that in the subsequent step. As we perform statistical analysis on these types of experiments, we must learn to account for the propagation of uncertainty from one step to the next. The propagation of uncertainty depends on the type of arithmetic operation performed on...
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Transmission-based Precautions II: Airborne and Protective Environment01:25

Transmission-based Precautions II: Airborne and Protective Environment

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Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
Use airborne precautions when treating patients known or suspected to have diseases that spread through the air—for example, tuberculosis or measles. These organisms are present in smaller droplets expelled by an infected person and...
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Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

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Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
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Network Function of a Circuit01:25

Network Function of a Circuit

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Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
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Transmission-based Precautions I: Contact, Enteric, and Droplets01:17

Transmission-based Precautions I: Contact, Enteric, and Droplets

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Transmission-based precautions are for patients known to be infected or suspected to be infected or colonized with organisms that pose a significant risk to others. Some transmission-based precautions include contact, enteric, and droplet.
Contact Precautions:
Contact precautions are the measures taken to prevent the transmission of infectious agents, especially epidemiologically important microorganisms such as MRSA or influenza, primarily transmitted through direct or indirect contact with an...
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Continuous Charge Distributions01:17

Continuous Charge Distributions

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Imagine a bucket of water. It contains many molecules, of the order of 1026 molecules. Thus, although it contains discrete elements (molecules) at the microscopic level, macroscopically, it can be considered continuous. Small volume elements of water, infinitesimal compared to the bulk of the bucket's volume, still contain many molecules. Under this framework, quantized matter is approximated as continuous for practical purposes.
The electric charge can also be subjected to an analogical...
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相关实验视频

Updated: Jul 26, 2025

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
05:30

Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

Published on: September 8, 2023

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连续变量量子密钥分配接入网络上游传输的实验.

Xiangyu Wang, Ziyang Chen, Zhenghua Li

    Optics letters
    |June 15, 2023
    PubMed
    概括

    连续变量量子密钥分布使实际的量子接入网络成为可能. 研究人员演示了一个双用户网络,达到390 kbits/s,为多用户量子通信铺平了道路.

    科学领域:

    • 量子信息科学 量子信息科学
    • 网络安全 网络安全
    • 应用物理 应用物理

    背景情况:

    • 连续变量量子密钥分布 (CVQKD) 为安全通信提供了一个有前途的途径.
    • 量子接入网络对于将量子通信扩展到最终用户至关重要.
    • 现有的CVQKD系统往往需要专门的,高成本的组件,这限制了实际部署.

    研究的目的:

    • 用CVQKD证明上游传输量子接入网络的可行性.
    • 实验实现双用户量子接入网络并评估其性能.
    • 分析多用户量子访问网络的容量.

    主要方法:

    • 使用低成本,现成的组件实现CVQKD.
    • 一个双终端用户量子访问网络的实验设置.
    • 应用技术升级,包括相位补偿和数据同步.
    • 通过在多用户场景中测量添加式过量噪声来分析网络容量.

    主要成果:

    • 上游传输量子接入网络的成功演示.
    • 一个双用户量子接入网络实现了总秘密密钥速率为390 kbits/s.
    • 对多个用户的网络容量的分析是通过测量过多的噪音来进行的.

    更多相关视频

    Quasi-light Storage for Optical Data Packets
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    相关实验视频

    Last Updated: Jul 26, 2025

    Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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    Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit

    Published on: September 8, 2023

    607
    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

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    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

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    结论:

    • CVQKD适用于使用可访问技术的实用,大型量子接入网络.
    • 实验实现验证了CVQKD在安全的终端用户连接方面的潜力.
    • 该研究提供了对多用户量子网络可扩展性和容量限制的见解.