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相关概念视频

Observational Learning01:12

Observational Learning

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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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Purposive Learning01:22

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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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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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Cognitive learning is based on purposive behavior, incidental learning, and insight learning.
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FlexSARCloak:一个灵活的SAR斗,由任务导向学习驱动.

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  • 1Interdisciplinary Center for Quantum Information, State Key Laboratory of Modern Optical Instrumentation, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou 310027, China.

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概括
此摘要是机器生成的。

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科学领域:

  • 超材料和纳米光子学
  • 电磁隐蔽是一种电磁隐蔽.
  • 应用物理 应用物理

背景情况:

  • 传统的遮材料往往是刚性的,限制了它们的实际应用.
  • 由于在复杂的电磁环境中无法控制的散射,在斗中实现灵活性是具有挑战性的.
  • 适应性强,可靠的隐形解决方案的需求仍然存在.

研究的目的:

  • 设计和演示一个宽带,偏振独立,灵活的斗,用于合成孔径雷达 (SAR) 应用.
  • 为了克服刚性覆盖材料的局限性,并在灵活的设计中应对分散的挑战.
  • 在各种环境条件下验证柔性斗的性能和稳定性.

主要方法:

  • 开发一个以任务为导向的学习 (TOL) 算法,用于超表面设计.
  • 柔性SAR斗 (FlexSARCloak) 的制造和实验测试.
  • 在广泛的频率范围 (9-25 GHz) 和冲击角度 (0-60°) 中评估电磁性能.
  • 在户外使用无人机 (UAV) 装载SAR系统进行实验.
  • 环境应激测试,包括极端温度,湿度和沙风模拟.

主要成果:

  • 在9-25 GHz频段,FlexSARCloak的吸收效率超过90%.
  • 在户外实验中,在无人机上装的SAR下实现了近乎完美的隐形性.
  • 在暴露于极端环境条件后,蒙蔽器保持了稳定的电磁性能.
  • 托尔算法显著加速了地表设计和优化.

结论:

  • 拟议的FlexSARCloak为灵活的宽带电磁遮提供了一个可行的解决方案.
  • 开发的TOL方法对于设计先进的超表面是有效的.
  • FlexSARCloak显示了电磁保护和多功能设备应用的巨大潜力.