优点：计算简单，导数恒为1（正区间），缓解梯度消失
Source: Computational Materials Science, Volume 267
。WPS下载最新地址是该领域的重要参考
from urllib.parse import urljoin, urlparse
Making freshness obvious requires explicit signals that AI models can easily detect. The most straightforward approach is including "Last updated: [Date]" at the top of articles, making it immediately clear that the content reflects current information. This simple addition can significantly impact whether AI models view your content as relevant for queries about current state or recent developments.