▲ 摘要：在许多星系团的中心，炽热（大约107开尔文）星系团内介质可变得足够致密，以至于其本应在短时间内冷却。然而，在大质量中心星系中测量到的恒星形成率很低，且冷却气体中没有软X射线，这表明大多数气体从未冷却过。这就是所谓的冷却流问题。

Feb. 10, 2025 — Entanglement -- linking distant particles or groups of particles so that one cannot be described without the other -- is at the core of the quantum revolution changing the face ...

Founded in 2006, this Scottish start-up wants to become ‘the world’s most important photonics and quantum technology company’. Dr Graeme Malcolm has a rich history with lasers. His interest ...

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Quantum dots are crystals of a fluorescent semiconductor material with a diameter of as few as 10 to 100 atoms (2-10 nm). They are used as labels for imaging molecules because of their very narrow ...

Quantum mechanics is the study of the dynamics of particles at its most fundamental level. The state of a particle, such as its position or momentum, is described by a statistical distribution ...

Mature tech companies offer a more reliable investment than pure quantum plays. Quantum breakthroughs are exciting but probably won't deliver game-changing or even usable systems for many years.

The best color laser printers are a great investment that can save you time and money compared to cartridge-based inkjet printers. Laser printers use toner, which lasts a long time, delivering a ...

(Most of these details come from Fred Beckey’s seminal “Cascade Alpine Guide: Climbing and High Routes, Vol. 2: Stevens Pass to Rainy Pass,” one of the Bibles of the climbing set. Full of ...

sudo apt update wget https://repo.radeon.com/amdgpu-install/6.3.1/ubuntu/noble/amdgpu-install_6.3.60301-1_all.deb sudo apt install ./amdgpu-install_6.3.60301-1_all ...