نتایج جستجو برای: gradients
تعداد نتایج: 37919 فیلتر نتایج به سال:
Abstract Policy gradient methods have become one of the most popular classes algorithms for multi-agent reinforcement learning. A key challenge, however, that is not addressed by many these credit assignment: assessing an agent’s contribution to overall performance, which crucial learning good policies. We propose a novel algorithm called Dr.Reinforce explicitly tackles this combining differenc...
AIM To compare estimated pressure gradients from routine follow-up cardiovascular phase-contrast magnetic resonance (PC-MR) with those from Doppler echocardiography and invasive catheterization in patients with congenital heart disease (CHD) and pulmonary outflow tract obstruction. METHODS In 75 patients with pulmonary outflow tract obstruction maximal and mean PC-MR gradients were compared t...
Here we present a novel microfluidic design to generate multiplex gradients of biomolecules based on hydrodynamic resistances. Chemical gradients were generated within parallel microfluidic channels, in which a range of multiplex concentration gradients with different profile shapes were simultaneously produced. We could also successfully generate covalent surface gradients of biomolecules. IgG...
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