<p>Variance, privacy level and combined metric of efficiency and privacy level of Gjestvang and Singh and Azeem et al. and corresponding proposed models.</p>

Variance, privacy level and combined metric of efficiency and privacy level of Gjestvang and Singh and Azeem et al. and corresponding proposed models.Gjestvang与Singh、Azeem等人的研究及对应所提出模型的方差、隐私级别，以及效率与隐私级别的组合指标。