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相关概念视频

Behavior of Concrete Under Compressive Load01:23

Behavior of Concrete Under Compressive Load

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Concrete exhibits specific behaviors under different compressive loads. Understanding this is crucial for understanding its structural integrity. When concrete undergoes uniaxial compression, it tends to develop cracks that run parallel to the direction of the force. These parallel cracks stem from localized tensile stresses that occur perpendicular to the compression direction. Additionally, angled cracks may appear due to the formation of shear planes.
As the concrete specimen fractures under...
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Avoidance Learning and Learned Helplessness01:14

Avoidance Learning and Learned Helplessness

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Avoidance learning and learned helplessness are critical concepts in understanding behavioral responses to negative stimuli.
Avoidance learning occurs when an organism learns that a specific behavior can prevent an unpleasant outcome. For example, a student who receives a bad grade may start studying harder to avoid future poor grades. This behavior persists even when the negative outcome is no longer present. Avoidance learning is powerful because it maintains behavior in the absence of the...
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Reconstruction of Signal using Interpolation01:10

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Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
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Associative Learning01:27

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Associative learning is a fundamental concept in behavioral psychology, wherein a connection is established between two stimuli or events, leading to a learned response. This process is critical in understanding how behaviors are acquired and modified. Conditioning, the mechanism through which associations are formed, can be divided into two main types: classical conditioning and operant conditioning, each elucidating different aspects of associative learning.
Classical conditioning, also known...
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Purposive Learning01:22

Purposive Learning

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E. C. Tolman emphasized the purposiveness of behavior — the idea that much of our behavior is goal-directed. For instance, employees who aim for a promotion work diligently to meet their targets. Tolman argued that when classical conditioning and operant conditioning occur, the organism acquires certain expectations. In classical conditioning, a child might fear a dog because they expect it to bite. In operant conditioning, a person might consistently work overtime because they expect a...
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Observational Learning01:12

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Albert Bandura's observational learning, also known as imitation or modeling, occurs when a person observes and imitates another's behavior. It is a quicker process than operant conditioning. A well-known example is the Bobo doll study, where children who saw an adult acting aggressively towards the doll were more likely to act aggressively when left alone, compared to those who observed a nonaggressive adult. Many psychologists view observational learning as a form of latent learning...
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Hyperspectral Imaging as a Tool to Study Optical Anisotropy in Lanthanide-Based Molecular Single Crystals
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在压缩高光谱图像重建之前学习视网膜.

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    这项研究引入了一种用于从压缩测量中重建超光谱图像的新方法. Retinex前驱展开网络 (RPDUN) 通过解决照明问题和减少噪音来提高图像质量.

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    科学领域:

    • 光学和光子学 在光学和光子学.
    • 计算机视觉 计算机视觉
    • 信号处理 信号处理

    背景情况:

    • 编码的光圈快照光谱压缩成像 (CASSI) 从二维测量中重建超光谱图像 (HSI).
    • 深度展开的网络与全球照明差异和CASSI重建中的文物作斗争.
    • 现有的方法往往无法捕捉内在的光谱特征,原因是空间光谱的降解.

    研究的目的:

    • 开发一个新的深度学习网络,从CASSI测量中进行高准确度HSI重建.
    • 为了解决CASSI降解模型中固有的全球照明差异和工件.
    • 引入Retinex前置和自适应令牌选择变压器 (ATST) 以改进重建.

    主要方法:

    • 提出了一个Retinex Prior驱动的展开网络 (RPDUN),将Retinex prior集成到一个多阶段网络中.
    • 作为全球照明调整的规范化术语,纳入Retinex之前.
    • 引入了自适应令牌选择变压器 (ATST) 以减轻反射率域中的噪声.

    主要成果:

    • RPDUN有效地弥补了空间光谱的退化,并捕捉了内在的光谱特征.
    • ATST模块可自适应地过令牌,减少反射率图中的噪音和工件.
    • 在模拟和真实数据集上实现了新的最先进的性能,提高了重建质量.

    结论:

    • RPDUN为CASSI系统的高光谱图像重建提供了显著的进步.
    • 整合Retinex prior和ATST提供了卓越的性能和计算效率.
    • 这项工作代表了Retinex在HSI重建前的首次应用.