selective fading

简明释义

选择性衰落

英英释义

例句

1.The phenomenon of selective fading 选择性消退 is often studied in psychology to understand memory retention.

在心理学中，选择性消退现象常被研究以理解记忆保持。

2.Teachers sometimes face selective fading 选择性消退 in students' attention during long lectures.

教师在长时间讲座中有时会面临学生注意力的选择性消退。

3.During the study, researchers observed that participants experienced selective fading 选择性消退 of certain memories over time.

在研究中，研究人员观察到参与者随着时间的推移经历了某些记忆的选择性消退。

4.In marketing, brands must be aware of selective fading 选择性消退 when consumers forget about their products.

在市场营销中，品牌必须意识到消费者对其产品的选择性消退。

5.In communication theory, selective fading 选择性消退 can impact how messages are received and interpreted.

在传播理论中，选择性消退可能影响信息的接收和解读。

作文

In the realm of communication theory, the term selective fading refers to a phenomenon where certain frequencies or signals are diminished while others remain strong. This concept is particularly relevant in wireless communications, where signals can be affected by various environmental factors such as obstacles, interference, and distance. Understanding selective fading is crucial for engineers and researchers who aim to optimize communication systems for better reliability and performance.The impact of selective fading can be observed in everyday life, especially in urban areas where buildings and other structures can obstruct radio waves. For instance, when you are using your mobile phone in a crowded city, you might experience fluctuations in call quality or data speed. These variations are often due to selective fading, where some frequencies are absorbed or reflected by surrounding objects, leading to a weaker signal.Moreover, selective fading can also occur in audio communications. In a crowded room filled with conversations, one might find it challenging to focus on a single voice while others fade into the background. This auditory phenomenon mirrors the concept of selective fading, where certain sounds are prioritized over others based on their frequency and clarity.To mitigate the effects of selective fading, engineers employ various techniques such as diversity schemes, equalization, and adaptive modulation. Diversity schemes involve using multiple antennas to receive signals from different paths, which helps to minimize the impact of fading. Equalization techniques adjust the received signals to counteract the distortion caused by fading, ensuring clearer communication. Adaptive modulation allows systems to change the modulation scheme based on the current channel conditions, optimizing performance in real time.In conclusion, selective fading plays a significant role in both wireless and audio communications. By understanding its effects and implementing strategies to counteract it, we can enhance the quality and reliability of our communication systems. As technology continues to evolve, further research into selective fading will undoubtedly lead to more robust solutions, allowing us to communicate more effectively in an increasingly complex world.

在通信理论领域，术语选择性衰落指的是某些频率或信号减弱而其他信号保持强度的现象。这个概念在无线通信中尤为重要，因为信号可能受到诸多环境因素的影响，例如障碍物、干扰和距离。理解选择性衰落对于工程师和研究人员来说至关重要，他们旨在优化通信系统以提高可靠性和性能。选择性衰落的影响可以在日常生活中观察到，尤其是在城市地区，建筑物和其他结构可能会阻挡无线电波。例如，当你在拥挤的城市中使用手机时，可能会体验到通话质量或数据速度的波动。这些变化通常是由于选择性衰落造成的，其中某些频率被周围物体吸收或反射，导致信号减弱。此外，选择性衰落也可能发生在音频通信中。在一个充满谈话的喧闹房间里，人们可能会发现很难专注于某个声音，而其他声音则逐渐消失。这种听觉现象与选择性衰落的概念相似，其中某些声音根据其频率和清晰度被优先处理。为了减轻选择性衰落的影响，工程师采用了多种技术，如多样性方案、均衡和自适应调制。多样性方案涉及使用多个天线从不同路径接收信号，这有助于最小化衰落的影响。均衡技术调整接收信号，以抵消衰落造成的失真，从而确保更清晰的通信。自适应调制允许系统根据当前信道条件改变调制方案，从而实时优化性能。总之，选择性衰落在无线和音频通信中都发挥着重要作用。通过理解其影响并实施对策，我们可以提高通信系统的质量和可靠性。随着技术的不断发展，对选择性衰落的进一步研究无疑将带来更强大的解决方案，使我们能够在日益复杂的世界中更有效地沟通。