code: def coupl_model8(self):
          
          self.Coupl = 0.5*self.Adj_signed
          # reduce the value of the coupling of the repressing genes
          # otherwise completely unstable solutions are obtained
          for x in np.nditer(self.Coupl,op_flags=['readwrite']):
              if x < -1e-6:
                  x[...] = -0.2
docs: Variant of toggle switch.