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相关概念视频

Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...

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相关实验视频

Updated: Jul 9, 2026

Patterning via Optical Saturable Transitions - Fabrication and Characterization
08:19

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非挥发性PCM驱动的光子计算使用可编程子波长数字元表面.

Liyun Hu, Yuexing Su, Yunlong Li

    Optics letters
    |August 15, 2025
    PubMed
    概括

    我们开发了一种新的光学计算核心,使用相变数字元表面来实现节能神经网络. 这种可编程设备为高级计算应用提供了高精度和可扩展性.

    科学领域:

    • 光子学和材料科学 材料科学
    • 光学计算是指光学计算的应用.
    • 非易失性存储器件设备

    背景情况:

    • 光学神经网络 (ONN) 需要节能且可扩展的计算核心.
    • 现有的解决方案在重新配置和功耗方面面临挑战.
    • 换相材料为光学设备提供了有前途的非挥发性特性.

    研究的目的:

    • 为光学计算引入可编程的非挥发性卷积核心.
    • 为了利用子波长相变的数字元表面来提高性能.
    • 为了实现节能和可扩展的光学神经网络.

    主要方法:

    • 使用亚波长Sb2Se3圆柱形阵列用于元表面制造.
    • 实现了用于非挥发性可编程性的数字架构.
    • 采用激光直接写作技术进行系统验证和修剪.

    主要成果:

    • 实现了增强的重量区分能力和减少插入损失.
    • 显示了广泛的重量范围 (0.1到0.93),每单位超过六个级别.
    • 经过验证的2位数字重配置性和零静电后修剪功能.

    结论:

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    • 开发的卷积核心为高精度光学计算提供了一个有希望的途径.
    • 阶段变换材料和数字架构的整合解决了关键的ONN要求.
    • 这项技术为像图像识别这样的应用提供了可扩展和节能的解决方案.