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関連する概念動画

Phase Contrast and Differential Interference Contrast Microscopy01:26

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Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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Relative risk (RR) is a statistical measure commonly used in epidemiology to compare the likelihood of a particular event occurring between two groups. This metric is important for evaluating the relationship between exposure to a specific risk factor and the probability of a particular outcome. It plays a crucial role in medical research, public health studies, and risk assessment. Relative risk quantifies how much more (or less) likely an event is to occur in an exposed group compared to an...
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Avoidance learning and learned helplessness are critical concepts in understanding behavioral responses to negative stimuli.
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The understanding of the concept of reference frames is essential to discuss relative motion in one or more dimensions. When we say that an object has a certain velocity, we must state the velocity with respect to a given reference frame. In most examples, this reference frame has been Earth. For instance, if a statement reads that a person is sitting in a train moving at 10 m/s east, then it implies that the person on the train is moving relative to the surface of Earth at this velocity,...
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The relative frequency depicts the proportion of data points that have each value. The frequency tells the number of data points that have each value. Like the histogram, a relative frequency histogram also has the same shape with a horizontal scale (the x-axis), but the vertical scale (the y-axis) is marked with relative frequencies (percentages of the whole) instead of actual frequencies. A relative frequency histogram is a graphical representation of a frequency distribution where the...
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Relative velocity is the velocity of an object as observed from a particular reference frame, or the velocity of one reference frame with respect to another reference frame. The concept of relative velocity can be used to describe motion in two dimensions. Consider a particle P and two reference frames S and S′. The position of the origin of S′ as measured in S is , the position of P as measured in S′ is , and the position of P as measured in S is , which can be evaluated by utilizing...
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ゼロショット関係抽出のためのプロンプト対照学習

Xueyi Zhong1, Liye Zhao2, Licheng Peng2

  • 1School of Finance, Southwestern University of Finance and Economics, Chengdu 611130, China.

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|January 28, 2026
PubMed
まとめ
この要約は機械生成です。

本研究では、事前学習済み言語モデルを活用してゼロショット学習を改善するために、関係抽出(PCRE)のためのプロンプト対照学習を導入します。PCREは、未知の関係の抽出を改善するために意味表現を強化します。

キーワード:
対照学習プロンプト学習関係抽出ゼロショット設定

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Last Updated: Jan 29, 2026

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科学分野:

  • 自然言語処理
  • 人工知能
  • 機械学習

背景:

  • 関係抽出は知識獲得にとって重要ですが、広範なデータ注釈が必要です。
  • ゼロショット学習は、モデルが未知の関係を特定できるようにすることで、注釈コストに対処します。
  • 現在のゼロショット法は、多様なタスク処方箋に苦労しており、最適ではないパフォーマンスにつながっています。

研究 の 目的:

  • 事前学習済み言語モデルからの知識を活用することにより、ゼロショット関係抽出のための新しいアプローチを開発すること。
  • 未知の関係に対する関係抽出モデルの意味表現能力を改善すること。
  • ゼロショット関係抽出を強化するためのプロンプト対照学習フレームワーク(PCRE)を導入すること。

主な方法:

  • プロンプトチューニングを介して事前学習済み言語モデルから意味知識を活用すること。
  • 対照学習のためのデュアルビューを作成するために、多様なプロンプトテンプレートでインスタンスを拡張すること。
  • テキスト記述から関係知識を抽出するために、インスタンス記述対照目的を実装すること。

主要な成果:

  • 提案されたPCRE法は、ゼロショット関係抽出において既存の最先端ベースラインを大幅に上回ります。
  • 実験結果は、PCREのロバスト性をさまざまなデータセットとトレーニング構成で実証しています。
  • PCREは、モデルが既知の関係と未知の関係を区別する能力を効果的に強化します。

結論:

  • PCREは、事前学習済み言語モデルを効果的に利用することにより、ゼロショット関係抽出を改善するための有望な方向性を提供します。
  • プロンプト対照学習戦略は意味表現を強化し、新しい関係の特定において優れたパフォーマンスにつながります。
  • この方法のロバスト性は、実際の知識抽出タスクにおける広範な適用可能性を示唆しています。