Characterization of beam energy spread in a space-charge dominated beam is very important to understanding the physics of intense beams.It is believed that coupling between the transverse and longitudinal directions via Coulomb collisions will cause an increase of the beam longitudinal energy spread.At the University of Maryland, experiments have b
To understand the water and energy exchange on the Qinghai-Tibetan Plateau, we explored the characteristics of evapotranspiration (ET) and energy fluxes from 2002 to 2005 over a Kobresia meadow ecosystem using the eddy covariance method.The ratio of annual ET to precipitation (P) of meadow ecosystem was about 60%, but varied greatly with the change
Abstract Introduction Calcium is an important coagulation factor and hypocalcemia is related to progression and poor prognosis of many cardiopulmonary diseases.However, influence of hypocalcemia on pulmonary thromboembolism (PTE) prognosis has never been reported.This study aimed to explore its prognostic value and optimize the pulmonary embolism s