code: def Misra1b(b, x, y=0):
      b = read_params(b)
      model = b[0] * (1 - (1 + b[1] * x / 2) ** (-2))
      return model - y
  
imports: import os
  from numpy import arctan, array, cos, exp, log, sin
  from lmfit import Parameters
label_desc: Use image node_id 16 for calling a global function with example usage: Misra1b(b, x, y) and returns: unknown