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相关概念视频

Visual System01:26

Visual System

501
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
501
Vision01:24

Vision

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Vision is the result of light being detected and transduced into neural signals by the retina of the eye. This information is then further analyzed and interpreted by the brain. First, light enters the front of the eye and is focused by the cornea and lens onto the retina—a thin sheet of neural tissue lining the back of the eye. Because of refraction through the convex lens of the eye, images are projected onto the retina upside-down and reversed.
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Anatomy of the Eyeball01:20

Anatomy of the Eyeball

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The eye is a spherical, hollow structure composed of three tissue layers. The outer layer — the fibrous tunic, comprises the sclera — a white structure — and the cornea, which is transparent. The sclera encompasses some of the ocular surface, most of which is not visible. However, the 'white of the eye' is distinctively visible in humans compared to other species. The cornea, a clear covering at the front of the eye, enables light penetration. The eye's middle...
5.9K
Neural Circuits01:25

Neural Circuits

1.0K
Neural circuits and neuronal pools are two of the main structures found in the nervous system. Neural circuits are networks of neurons that work together to carry out a specific task or process. They consist of interconnected neurons and glial cells, which provide structural and metabolic support.
Neuronal pools are collections of nerve cells with similar functions and interact through chemical and electrical signals. These pools include both interneurons (the central neural circuit nodes that...
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The Retina01:32

The Retina

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The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.
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相关实验视频

Updated: Jun 2, 2025

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording
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大规模高均的光电子突触阵列用于人工视觉神经网络.

Fanqing Zhang1,2,3, Chunyang Li1,2,3, Zhicheng Chen4,5

  • 1State Key Laboratory of Explosion Science and Safety Protection, Beijing Institute of Technology, Ministry of Education, 100081, Beijing, China.

Microsystems & nanoengineering
|January 13, 2025
PubMed
概括
此摘要是机器生成的。

研究人员为人工视觉系统开发了一种紧的28x28突触器件阵列. 这种神经形态系统整合了感知,记忆和处理,实现了人工卷积神经网络 (CNN) 96.5%的数字识别精度.

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相关实验视频

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科学领域:

  • 材料科学 材料科学 材料科学
  • 神经科学是一个神经科学.
  • 计算机科学 计算机科学

背景情况:

  • 生物启发的人工视觉系统的开发面临着大规模并行处理对记忆和识别的挑战.
  • 现有的人工视觉系统需要在集成和效率方面取得重大进展.

研究的目的:

  • 为人工视觉神经形态系统展示一个紧的,高度集成的突触设备阵列.
  • 研究二硫化物和金纳米颗粒用于合成晶体管制造的潜力.
  • 为了实现高效的视觉信息处理,包括识别和图案操纵.

主要方法:

  • 使用晶圆尺度增长的单层二硫化物 (MoS2) 制造一个 28x28 阵列的高度均的浮式门突触晶体管.
  • 纳入金纳米粒子 (Au NPs) 作为电子捕获层,以实现可切换电子存储和突触可塑性.
  • 在784设备阵列内实现光电信号协调,用于并行处理.

主要成果:

  • 通过可切换电子存储展示了各种突触可塑性行为.
  • 成功实现了使用突触阵列的章和字母的写入和删除过程.
  • 通过基于光学/电信号调制的人工视觉卷积神经网络 (CNN) 实现了96.5%的高数字识别精度.

结论:

  • 开发的突触设备阵列为创建大规模集成的人工视觉神经形态系统提供了可行的途径.
  • 传感,记忆和处理功能的集成在一个紧的形式因素是一个显著的进步.
  • 使用MoS2和Au NPs为未来的神经形态硬件提供了一个有前途的材料平台.