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相关概念视频

Language and Cognition01:27

Language and Cognition

342
Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
342
Nonsense-mediated mRNA Decay02:27

Nonsense-mediated mRNA Decay

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Difference from Background: Limit of Detection01:05

Difference from Background: Limit of Detection

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The limit of detection (LOD) is the smallest amount of analyte that can be distinguished from the background noise. The LOD value corresponds to the concentration at which the analyte signal is three times larger than the standard deviation of the blank signal. Below this value, the analyte signal cannot be differentiated from the background noise. It is calculated by dividing the calibration slope by 3 times the standard deviation of the blank signals.
The LOD indicates the presence or absence...
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RNA Editing02:23

RNA Editing

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RNA editing is a post-transcriptional modification where a precursor mRNA (pre-mRNA) nucleotide sequence is changed by base insertion, deletion, or modification. The extent of RNA editing varies from a few hundred bases, in mitochondrial DNA of trypanosomes, to a just single base, in nuclear genes of mammals. Even a single base change in the pre-mRNA can convert a codon for one amino acid into the codon for another amino acid or a stop codon. This type of re-coding can significantly affect the...
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Transcription Attenuation in Prokaryotes02:42

Transcription Attenuation in Prokaryotes

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Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure.  Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
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Small interfering RNAs (siRNA)02:30

Small interfering RNAs (siRNA)

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相关实验视频

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Augmenting Large Language Models via Vector Embeddings to Improve Domain-Specific Responsiveness
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Augmenting Large Language Models via Vector Embeddings to Improve Domain-Specific Responsiveness

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对于自然语言处理中对抗性攻击的最小描述长度的影响

Kshitiz Tiwari1, Lu Zhang1

  • 1Department of Electrical Engineering and Computer Science, University of Arkansas, Fayetteville, AR 72701, USA.

Entropy (Basel, Switzerland)
|May 24, 2024
PubMed
概括

本研究引入了一种强大的自然语言处理 (NLP) 的新方法,通过分析对抗性攻击作为因果机制. 它使用算法信息量化文本的改变,有助于检测没有原始文本的操纵数据.

科学领域:

  • 自然语言处理自然语言处理.
  • 机器学习中的因果关系
  • 算法信息理论 算法信息理论

背景情况:

  • 目前用于训练强大的NLP模型的方法在词汇识别和多环境数据采集方面面临挑战.
  • 敌对攻击对NLP系统的可靠性构成重大威胁.
  • 了解这些攻击背后的因果机制对于开发有效的防御至关重要.

研究的目的:

  • 提出一种新的方法来提高自然语言处理 (NLP) 模型的稳定性.
  • 调查NLP模型的对抗性攻击背后的因果机制.
  • 开发检测攻击引起的文本更改的技术,即使没有访问原始数据.

主要方法:

  • 将对抗性攻击行为视为复杂的因果机制.
  • 使用最小描述长度 (MDL) 框架量化文本更改的算法信息.
  • 使用掩盖语言建模 (MLM) 来测量文本转换的"努力".

主要成果:

  • 开发了一种方法来测量使用MLM和MDL的文本更改.
  • 证明了基于其算法信息识别更改代币的能力.
  • 建立了一种检测对抗性操纵而不需要原始文本数据的技术.
关键词:
在NLP中,我们使用了NLP.敌对的攻击是对抗性的攻击.因果学习是一种因果学习.描述的最小长度.

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结论:

  • 提出的因果关系方法为强大的NLP提供了新的视角.
  • 通过MDL和MLM测量的算法信息,为检测对抗性文本修改提供了可行的指标.
  • 这种方法提高了NLP模型的稳定性,使得在具有挑战性的场景中能够检测到改变的数据.