XDA Developers on MSN

I found an open-source app like Obsidian, except it's better

Discover why Zettlr, an open-source writing app, offers a cleaner and more focused alternative to Obsidian for academic ...
腾讯网

《Nature》顶刊！超越标准量子极限，新型GPS技术实现量子增强测量

光学原子钟作为人类最精密的测量仪器之一，其频率不稳定度和不准确度已达到10⁻¹⁸水平，在基础物理检验、相对论大地测量、暗物质探测等领域具有重要应用。然而，传统光学原子钟的测量精度受限于标准量子极限，即由N个独立原子的量子投影噪声所决定的相位测量不确定 ...