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相关概念视频

Introduction to Cognitive Psychology01:20

Introduction to Cognitive Psychology

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Cognitive psychology is the field of psychology dedicated to examining how people think. It attempts to explain how and why we think the way we do by studying the interactions among human thinking, emotion, creativity, language, and problem-solving, as well as other cognitive processes. Cognitive psychology studies how information is processed and manipulated in remembering, thinking, and knowing.
This field emerged in the mid-20th century, following a period dominated by behaviorism, which...
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Cognitivism01:17

Cognitivism

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Cognitive psychology emerged as a significant field in the mid-20th century. It focused on understanding humans' internal mental processes. This approach emphasizes how people perceive, remember, think, and solve problems—elements critical to human cognition.
Previously dominated by behaviorism, which prioritized observable behaviors and largely ignored mental processes, psychology transformed in the 1950s. Cognitive psychologists argue that understanding how we think and process...
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Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists01:30

Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists

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Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
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Cognitive Therapy01:25

Cognitive Therapy

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Cognitive therapy, pioneered by Aaron T. Beck in the 1960s, is a structured approach to addressing psychological distress by focusing on the influence of thoughts on emotions and behaviors. All cognitive therapies involve the basic assumption that human beings have control over their feelings, and that how individuals feel about something depends on how they think about it. Unlike psychoanalytic methods that delve into unconscious processes or humanistic approaches emphasizing...
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High-Level and Low-Level Awareness01:19

High-Level and Low-Level Awareness

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Controlled processes in human consciousness represent high-alert mental states where individuals deliberately focus their attention on achieving specific goals. Controlled processes can be seen in situations like mastering new technology, where a person might become so absorbed that they ignore surrounding distractions. Such processes involve selective attention, requiring one to concentrate on particular elements of experience while disregarding others. These are governed by executive...
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Rational Emotive Behavior Therapy01:24

Rational Emotive Behavior Therapy

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Cognitive-behavioral therapies (CBTs) are grounded in the belief that our thoughts profoundly influence our emotions and actions. Advocates of CBT emphasize three core assumptions: first, that cognitions are identifiable and measurable; second, that they are central to psychological functioning; and third, that irrational or maladaptive beliefs can be replaced with rational and adaptive ones. This transformative approach to therapy has paved the way for specific models such as Albert...
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相关实验视频

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Quantifying Cognitive Decrements Caused by Cranial Radiotherapy
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认知无线电网络:技术,挑战和应用

Yang Xu1, Kechen Zheng2, Xiaoying Liu2

  • 1School of Computer Science and Technology, Xidian University, Xi'an 710071, China.

Sensors (Basel, Switzerland)
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PubMed
概括
此摘要是机器生成的。

认知无线电网络 (CRN) 通过实现动态频谱共享来改善无线频谱访问. 这项研究探讨了有效的CRN策略,以克服传统的分配限制.

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科学领域:

  • 计算机科学 计算机科学
  • 电气工程 电气工程
  • 电信 电信服务 电信服务 电信服务

背景情况:

  • 对无线频谱的不断增长的需求需要创新的解决方案,超越静态分配.
  • 传统的频谱管理政策导致使用不足和干扰问题.
  • 认知无线电网络 (CRN) 为频谱访问提供了一个动态的方法.

研究的目的:

  • 调查和提出用于CRN高效频谱管理的先进策略.
  • 提高频谱利用率,并尽量减少动态无线环境中的干扰.
  • 解决传统频谱分配政策的局限性.

主要方法:

  • 审查现有的CRN架构和频谱传感技术.
  • 开发新的动态频谱访问算法.
  • 拟议CRN协议的模拟和性能分析.

主要成果:

  • 在频谱访问效率方面取得了显著的改进.
  • 与静态方法相比,频谱未充分利用的量化减少.
  • 在各种CRN场景中验证了拟议算法的有效性.

结论:

  • CRN为现代无线通信需求提供了可行和高效的解决方案.
  • 在CRN中的动态频谱共享对于克服频谱稀缺性至关重要.
  • 对CRN优化的进一步研究可以释放更大的无线容量.