Quadrupole mass spectrometers are widely applied due to their compact structure, easy operation, and mature technology, which offer high economic and market competitiveness across various fields. A ...

Physically-based, fully distributed hydrologic models simulate multiple states and fluxes in space and time 1,2,3,4,5,6,7,8. These models account for the heterogeneities in hydrogeologic parameters ...

Scientists can determine the mass of subatomic particles that are built from quarks by looking at the particles' energy and momentum in four-dimensional spacetime. One of the quantities that encode ...