物理信息神经网络(PINNs):直观指南
本文深入浅出地介绍了物理信息神经网络(PINNs)这一融合了深度学习与物理定律的前沿技术。文章从直觉出发,解释了PINNs如何通过将偏微分方程等物理约束直接嵌入神经网络的损失函数中,使得模型在数据稀缺时仍能做出符合物理规律的预测。作者还探讨了PINNs的优势、挑战以及其在科学计算和工程模拟中的广泛应用前景。
本文深入浅出地介绍了物理信息神经网络(PINNs)这一融合了深度学习与物理定律的前沿技术。文章从直觉出发,解释了PINNs如何通过将偏微分方程等物理约束直接嵌入神经网络的损失函数中,使得模型在数据稀缺时仍能做出符合物理规律的预测。作者还探讨了PINNs的优势、挑战以及其在科学计算和工程模拟中的广泛应用前景。
A state-designed worm from 2005 called Fast16 sat undetected on VirusTotal for nearly a decade. It intercepted executable files at the kernel level and silently altered floating-point calculations in high-precision engineering software like LS-DYNA, which was used in Iran's nuclear weapons research. Unlike Stuxnet, Fast16 received little public attention for over twenty years.
Paul Graham reports that Y Combinator startups now have over 75% of their code written by AI, a threshold crossed at least one to two years ago. This parallels a similar transformation at Google, where AI-written code went from 0% to 75% in about two years.
Scientists are increasingly concerned about the potential collapse of the Atlantic Meridional Overturning Circulation (AMOC), a critical ocean current system. Such a collapse could have severe consequences for North America and Europe.
A compromised version of the LiteLLM Python package (version 1.82.8) was briefly available on PyPI, capable of exfiltrating sensitive credentials like SSH keys and cloud secrets. The malicious package affected any project that depended on LiteLLM, though it was only available for about an hour before discovery.
A supply chain attack has compromised the popular npm axios HTTP client library with 300 million weekly downloads. Malicious versions install a remote access trojan, though some users may have avoided infection through version pinning or older installations. Security experts warn this is a live compromise affecting one of npm's most depended-on packages.