And then, its influence function and asymptotic variance - co variance matrix are investigated. 然后,研究了该估计的影响函数和渐近方差(AV)&协方差矩阵;
But with the existence of heteroscedasticity and autocorrelation of unknown form, estimating asymptotic variance consistently can be pretty complicated due to the bandwidth selection and the nuisance parameter estimation. 然而,当未知形式的相关性和条件异方差性存在时,带宽的选择和厌恶参数的估计使得一致估计渐进方差变得很复杂。
The Asymptotic Variance(AV) - covariance Matrix in L_q-norm Estimate and Its Characteristic Lq估计的渐近方差(AV)-协方差矩阵及其特点
An asymptotic minimal variance self-tuning control scheme is used to the circuit of autopilot. 采用一种渐近的最小方差自校正控制方案设计导弹自动驾驶仪回路。
Methods : The survival process was modeled by discrete Markov chain and the asymptotic expectation and variance of log-rank statistics were calculated thereafter. The sample size formula was thus derived. 方法:以离散性Markov链拟合生存过程,据此计算log-rank统计量的数学期望和方差,导出样本含量估计公式。