biro Bi birandom empirical risk minimization principle Bimmuneglobuinn mother-toinfant transmission bifurcation in parallel-controlled converter Bi-level positive airway pressure ventilation bilinear isoparametric symmetric finite element biaural simultaneous loudness balance technique bifilar helix biperiodic electrostatic focusing bimetal strip-type fixed temperature detector biplane poly-diagnostic cardiovascular system bi-directional coupled elastic-plastic model