Abstract We investigate the use of reduced-order modelling to run discrete element simulations at higher speeds. Taking a data-driven approach, we many offline in advance and train model predict velocity field from mass distribution system control signals. Rapid inference particle velocities replaces intense process computing contact forces updates. In coupled DEM multibody simulation, predicto...

The first lower bound was proved by Jayram and Woodruff [1] and then by Kane,Meka,Nelson [2]. The lower bound tells that any ( , δ)-DJL for , δ ∈ (0, 1/2) must have m = Ω(min{n, −2 log(1δ )}). The second proof builds on the following idea: Since for all x we have the probabilistic guarantee PΠ∼D ,δ [|‖Πx‖2−1| < max{ , 2}] < δ, then it is true also for any distribution over x. We are going to pi...