Main characteristics ofstatisticalaccuracyforP-S-Ncurves are analyzed and the method for meansquareerror of P-S-N curves parameters by computersimulation is brought forward.
分析了反映P S N曲线统计精度的主要指标，提出了P S N曲线参数估计量的均方误差计算机模拟求法。
Witnesses described a fast-moving series of events that unfolded at about 12:30 p.m. on the southbound platform of the 49th Street station near Times Square, a law-enforcement official said.