Abstract: This work presents a D-band reconfigurable Quadrature Second Harmonic modulator. The proposed modulator features a quadrature frequency doubler with integrated shunt switches at the ...

At SLAC National Accelerator Laboratory in Menlo Park on Wednesday morning, researchers focused a powerful X-ray machine on pages of parchment from a medieval desert monastery, looking to reveal ...

Please be aware that this is a beta release. Beta means that the product may not be functionally or feature complete. At this early phase the product is not yet expected to fully meet the quality, ...

Actor and Monty Python alum John Cleese questioned whether the World Cup should be held in the US after an ICE agent’s fatal shooting of a woman in Minnesota. Renee Good was killed while operating a ...

Python 版本过旧：ImportError: cannot import name '_setup_dialog` from 'tkinter.simpledialog' 遇到这个报错，是因为 Python 版本太旧。 以 Python 3.9 为例，最新的 IDLE 3.9 所使用的 _setup_dialog 函数是在 Python 3.9.5 添加的。 如果您的 Python 3.9 ...