Postnatal Development of Brain Natriuretic Peptide-immunoreactive Neuron in the Hypothalamus of the Rat

Design and experiment of corn low damage threshing device based on DEM

“…The simulation experiments were run in EDEM 2018 (Engineering discrete element method, DEM Solution Ltd.) environment, EDEM simulation operation steps were as follows: 1) Combined with previous biomechanical parameter tests and references, thresher materials, and maize materials were established. Considering the influence of threshing cylinder materials on threshing effect, the materials of threshing cylinder were rubber, cast iron, and 50Mn steel [24] ; 2) Mechanical parameters between kernel and threshing cylinder were set, such as sliding friction coefficient and collision recovery coefficient, as listed in Table 1 and 2 [3,[25][26][27][28][29] ; 3) Added to three interaction models that "Particle to Particle", "Particle to Geometry", and "Particle Body Force", there was basically no adhesion on kernel surface, so the Hertz-Mindlin no slip model was selected for "Particle to Geometry", and the discrete element model of kernel was generated by particle filling method, so the Hertz-Mindlin with bonding model was selected for "Particle to Particle". The Particle Body Force selected the complied file of particlereplacement.dll to define the replacement parameters of kernels; 4) In addition to the rotation of threshing cylinder, a particle factory was added at the installation connection point of cylinder screw feeder.…”