We produce distance data of the line transect to imitate with 5 density estimations, RRMSE and RB are used to appraise the estimate value and verify their quality.

• 把5种密度推定法用于计算机模拟产生测线调查的距离数据，由统计量RRMSE和RB对推定值进行评价，来验证其优劣。