Integrated GP-Lower Confidence Bound

def _compute_acq(self,x):
        """
        Integrated GP-Lower Confidence Bound
        """ 
        means, stds = self.model.predict(x)
        f_acqu = 0
        for m,s in zip(means, stds):
            f_acqu += -m + self.exploration_weight * s
        return f_acqu/(len(means))