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相关概念视频

Electrical Synapses01:28

Electrical Synapses

8.3K
Electrical synapses found in all nervous systems play important and unique roles. In these synapses, the presynaptic and postsynaptic membranes are very close together (3.5 nm) and are actually physically connected by channel proteins forming gap junctions.
Gap junctions allow the current to pass directly from one cell to the next. In contrast, in the chemical synapse, the neurotransmitters carry the information through the synaptic cleft from one neuron to the next. They consist of two...
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Neural Circuits01:25

Neural Circuits

1.3K
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...
1.3K
Overview of Synapses01:25

Overview of Synapses

2.4K
A synapse is a specialized structure where two neurons connect, allowing them to pass an electrical or chemical signal to another neuron. It is the point of communication between neurons. The term "synapse" is derived from the Greek word "synapsis," which means "conjunction." The entire process of neural communication revolves around the synapse. When activated, a neuron releases chemicals known as neurotransmitters into the synapse. These neurotransmitters cross the synapse and bind to...
2.4K
Visual System01:26

Visual System

594
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...
594
Photoreceptors and Visual Pathways01:22

Photoreceptors and Visual Pathways

6.1K
At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
6.1K
Vision01:24

Vision

53.5K
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.
53.5K

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相关实验视频

Updated: Jul 12, 2025

Computational Modeling of Retinal Neurons for Visual Prosthesis Research - Fundamental Approaches
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Computational Modeling of Retinal Neurons for Visual Prosthesis Research - Fundamental Approaches

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人工视觉突触架构具有高线性光调节重量,用于光电子神经形态计算.

Ying Liu1, Biao Wang1, Lei Wu1

  • 1Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Institute of Optoelectronic Integration, College of Materials Science and Engineering, Hunan University, Changsha 410082, China.

ACS applied materials & interfaces
|October 27, 2023
PubMed
概括

这项研究介绍了一种新的光电子神经形态系统,使用电色器件和矿光探测器来实现先进的人工智能 (AI). 新设计改善了视觉突触功能和图像识别精度,克服了当前神经形态计算的局限性.

关键词:
人工突触 (Synapse) 是一个人工突触.电染色器件是一种电染色器件.图像识别功能 图像识别功能神经形态计算是一种神经形态计算.矿光电探测器 矿光电探测器

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Methodology for Biomimetic Chemical Neuromodulation of Rat Retinas with the Neurotransmitter Glutamate In Vitro
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Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording
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Methodology for Biomimetic Chemical Neuromodulation of Rat Retinas with the Neurotransmitter Glutamate In Vitro
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科学领域:

  • 神经形态工程的神经形态工程
  • 光电学是指光电子产品.
  • 人工智能的人工智能

背景情况:

  • 传统的·诺伊曼架构在新兴的人工智能应用中面临局限性.
  • 神经形态视觉感官和记忆系统对人工智能至关重要,但存在非线性,交叉声和整合问题.
  • 现有的系统阻碍了人工智能的高水平培训和推断精度.

研究的目的:

  • 为改进人工智能提出一种新的光电子神经形态架构.
  • 解决神经形态系统中的非线性,交叉和整合挑战.
  • 为了增强视觉突触功能和图像识别精度.

主要方法:

  • 电色装置与矿光探测器的集成.
  • 利用电色器件的记忆特性和矿光探测器的光响应.
  • 通过调整外部光信号强度和波长来调节视觉突触功能.

主要成果:

  • 神经形态设备显示了视觉突触功能,如光触发,神经促进,长期强化和抑郁 (LTP和LTD).
  • 该设备表现出高重量线性和改进的信息处理和图像识别精度.
  • 实现了大规模,统一的10x10设备阵列的制造,具有高度的集成兼容性和可扩展性.
  • 使用MNIST和CIFAR-10算法的模拟结果是高识别精度 (分别为97.94%和91.04%) 与低错误率 (<2.5%).

结论:

  • 提出的光电子神经形态架构有效地克服了当前系统的局限性.
  • 该设备显示了作为高效的人工视觉神经形态系统的原型的潜力.
  • 该架构为高级AI应用提供了可扩展和兼容的解决方案.