code: def _get_add_ucb_beta_th(dim, time_step):
      """Computes the beta t for UCB based methods."""
      return np.sqrt(0.2 * dim * np.log(2 * dim * time_step + 1))
  
imports: from __future__ import division
  from argparse import Namespace
  from copy import copy
  import numpy
  from scipy.stats import norm
  from ..utils.general_utils import solve_lower_triangular
  from ..gp.gp_core import get_post_covar_from_raw_covar
  from ..exd.domains import EuclideanDomain
  from ..exd.exd_utils import maximise_with_method
label_desc: Use image node_id 7 for calling a global function with example usage: _get_add_ucb_beta_th(dim, time_step) and returns: np