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相关概念视频

Types Of Transformers01:16

Types Of Transformers

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Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
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Transformers01:26

Transformers

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A device that transforms voltages from one value to another using induction is called a transformer. A transformer consists of two separate coils, or windings, wrapped around the same soft iron core. However, they are electrically insulated from each other.
The iron core has a substantial relative permeability. Therefore, the magnetic field lines generated due to the current in one winding are almost entirely confined within the core, such that the same magnetic flux permeates each turn of both...
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Force Classification01:22

Force Classification

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Forces play a crucial role in the study of physics and engineering. They are essential in describing the motion, behavior, and equilibrium of objects in the physical world. Forces can be classified based on their origin, type, and direction of action.
Contact and non-contact forces are two of the most widely used categories of forces. As the name suggests, contact forces require physical contact between two objects to act upon each other. Examples of contact forces include frictional,...
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Classification of Systems-II01:31

Classification of Systems-II

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Continuous-time systems have continuous input and output signals, with time measured continuously. These systems are generally defined by differential or algebraic equations. For instance, in an RC circuit, the relationship between input and output voltage is expressed through a differential equation derived from Ohm's law and the capacitor relation,
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Classification of Systems-I01:26

Classification of Systems-I

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Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:
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Multi-input and Multi-variable systems01:22

Multi-input and Multi-variable systems

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Cruise control systems in cars are designed as multi-input systems to maintain a driver's desired speed while compensating for external disturbances such as changes in terrain. The block diagram for a cruise control system typically includes two main inputs: the desired speed set by the driver and any external disturbances, such as the incline of the road. By adjusting the engine throttle, the system maintains the vehicle's speed as close to the desired value as possible.
In the absence...
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相关实验视频

Updated: Jun 28, 2025

Swin-PSAxialNet: An Efficient Multi-Organ Segmentation Technique
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多模态长文档分类基于层次提示符和多模态变压器.

Tengfei Liu1, Yongli Hu1, Junbin Gao2

  • 1Beijing Key Laboratory of Multimedia and Intelligent Software Technology, Beijing Institute of Artificial Intelligence, Faculty of Information Technology, Beijing University of Technology, Beijing 100124, China.

Neural networks : the official journal of the International Neural Network Society
|April 23, 2024
PubMed
概括

本研究介绍了一种新的等级提示符和多模转换器 (HPMT),用于对长文件与图像进行分类. 该HPMT方法有效地捕捉到等级特征和多模式关联,优于现有技术.

关键词:
多模式长文档分类多模式长文档分类多模式变压器多模式变压器多种规模的多模态变压器.快速学习 快速学习

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科学领域:

  • 计算机科学 计算机科学
  • 人工智能的人工智能
  • 自然语言处理自然语言处理.

背景情况:

  • 现有的长文档分类 (LDC) 方法主要集中在单模式文本数据上.
  • 多模式文档的潜力,包括文本和图像,在最不发达国家仍未得到充分利用.

研究的目的:

  • 为多模式长文件分类提出创新方法.
  • 通过整合图像数据来解决单模LDC的局限性.

主要方法:

  • 引入了多模式LDC的等级快速和多模式变压器 (HPMT).
  • 开发了一种多尺度多模转换器 (MsMMT),以捕捉各种细粒度的句子和图像之间的相关性.
  • 在 MsMMT 中,在句子特征上嵌入了多尺度卷积内核.
  • 设计了一个等级提示符 (HierPrompt) 块,用于使用部分级和句子级提示符进行跨级信息交互.

主要成果:

  • 在多模式长文档分类中,HPMT方法表现出卓越的性能.
  • 在四个具有挑战性的数据集上,在现有技术上取得了显著的性能优势.
  • 该模型有效地捕捉了层次结构特征和复杂的多模式关联.

结论:

  • 拟议的HPMT方法对于多模式长文档分类非常有效.
  • 整合层次提示和多模式变压器可以提高对复杂文档结构的理解.
  • 这种方法为研究多模式文档分析开辟了新的途径.