%
%       dbss.m
%

  function ss = dbss(params,data)

  global Re Pr

  Nu = data.ydata;
 
  q1 = params(1);
  q2 = params(2);
  q3 = params(3);

  res = q1*(Re.^(q2)).*(Pr.^(q3)) - Nu;

  ss = res'*res;