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相关概念视频

Vision01:24

Vision

59.4K
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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The Integrated Rate Law: The Dependence of Concentration on Time02:39

The Integrated Rate Law: The Dependence of Concentration on Time

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While the differential rate law relates the rate and concentrations of reactants, a second form of rate law called the integrated rate law relates concentrations of reactants and time. Integrated rate laws can be used to determine the amount of reactant or product present after a period of time or to estimate the time required for a reaction to proceed to a certain extent. For example, an integrated rate law helps determine the length of time a radioactive material must be stored for its...
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Continuous -time Fourier Transform01:11

Continuous -time Fourier Transform

852
The Fourier series is instrumental in representing periodic functions, offering a powerful method to decompose such functions into a sum of sinusoids. This technique, however, necessitates modification when applied to nonperiodic functions. Consider a pulse-train waveform consisting of a series of rectangular pulses. When these pulses have a finite period, they can be accurately represented by a Fourier series. Yet, as the period approaches infinity, resulting in a single, isolated pulse, the...
852
Discrete-time Fourier transform01:26

Discrete-time Fourier transform

1.0K
The Discrete-Time Fourier Transform (DTFT) is an essential mathematical tool for analyzing discrete-time signals, converting them from the time domain to the frequency domain. This transformation allows for examining the frequency components of discrete signals, providing insights into their spectral characteristics. In the DTFT, the continuous integral used in the continuous-time Fourier transform is replaced by a summation to accommodate the discrete nature of the signal.
One of the notable...
1.0K
Sample Preparation for Analysis: Advanced Techniques01:08

Sample Preparation for Analysis: Advanced Techniques

1.3K
Accurate analysis of complex samples often requires advanced preparation techniques to achieve reliable and reproducible results. Samples containing inorganic or organic materials can be challenging to dissolve or decompose effectively. Standard sample preparation methods include acid digestion, fusion, dry ashing, and wet digestion.
Acid digestion with strong acids is commonly used to dissolve inorganic materials that are insoluble (do not dissolve) in water. This method can be useful for...
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Cardiopulmonary Resuscitation V: Advanced Airway Management Techniques01:30

Cardiopulmonary Resuscitation V: Advanced Airway Management Techniques

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Airway management is essential in emergency and surgical medicine, ensuring ventilation and oxygenation in patients who cannot maintain their own airway. Clinicians use a range of techniques and devices to secure the airway, depending on the patient’s condition and the clinical context. Key methods include endotracheal intubation, rapid sequence intubation (RSI), supraglottic airway devices, and advanced visualization aids. In cases where these approaches fail, surgical airway...
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相关实验视频

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Two-photon axotomy and time-lapse confocal imaging in live zebrafish embryos
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Two-photon axotomy and time-lapse confocal imaging in live zebrafish embryos

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使用视觉转换器进行先进的胚胎平分类: 连续时间延迟成像和低采样技术的整合: 一项回顾性研究

Muhammad Fauzan Avidiansyah1, Nining Handayani1, Tri Aprilliana1

  • 1IRSI Research Centre, Jakarta, Indonesia.

Journal of human reproductive sciences
|January 21, 2026
PubMed
概括

视觉转换器 (ViT) 结合时间延迟成像和随机下面抽样 (RUS) 改善了胚胎化分类. 这种方法提高了马赛克胚胎的准确性,这对于优化辅助生殖技术 (ART) 结果至关重要.

关键词:
辅助生殖技术是一种辅助生殖技术.胚胎 ploidy 分类的分类.时间延迟成像技术的时间延迟成像.视觉变压器 视觉变压器

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科学领域:

  • 辅助生殖技术 (ART) 是一种辅助生殖技术.
  • 计算生物学 计算生物学
  • 遗传学 是一个遗传学.

背景情况:

  • 准确的胚胎化鉴定对于成功的辅助生殖技术 (ART) 结果至关重要.
  • 传统的深度学习模型在与阶级不平衡作斗争,特别是代表不充分的马赛克胚胎.
  • 马赛克胚胎在 ploidy 分类中构成了重大挑战.

研究的目的:

  • 通过视觉转换器 (ViT) 提高胚胎化分类的准确性.
  • 将顺序时间延迟成像与ViT集成,以改善胚胎评估.
  • 通过随机低抽样 (RUS) 来解决数据不平衡,特别是马赛克胚胎的代表性不足.

主要方法:

  • 进行了对1020个胚胎细胞阶段时间延迟视频的回顾性分析.
  • 定制的深度学习模型,特别是ViT-B/16和ViT-B/32,进行了微调.
  • 应用了随机低样本 (RUS) 来创建一个平衡的数据集,每个类 (欧体,无体,马赛克) 17,000 个图像.

主要成果:

  • 在平衡数据集上,ViT-B/16模型在二进制分类中达到0.84准确度,在多类分类中达到0.67准确度.
  • 在不平衡的数据集上,性能显著下降到0.49,突显了RUS.的有效性.
  • 随机低抽样显著提高了少数阶级的预测准确度,包括马赛克胚胎.

结论:

  • 将ViT与顺序时差成像和RUS集成,为胚胎化分类提供了一个有希望的非侵入性方法.
  • 这种方法提高了识别马赛克胚胎的准确性.
  • 这些发现支持在ART中进行更明智的胚胎选择,可能提高成功率.