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1·Thus the estimator is an efficient estimator which utilizes only a few snapshots to estimate the spectrum.

该方法是一种可以利用少量快拍进行谱估计的有效方法。

2·To prove that OLS estimators are asymptotically efficient, one needs to (1) present an estimator that is consistent but its variance is larger.

为了证明ols估计量是渐近有效的，我们需要(1)给出一致的估计量但证明它有更大的方差。

3·The computing results of GPS data show that the new estimator is highly efficient and stable.

最后给出了实测gps动态定位算例，验证了新估计的稳定性和有效性。

4·My research concentrates on discretization of model optimal control problem , development of the posteriori error estimator and designment of efficient solver for discrete optimal control problem.

我的研究在于为模型最优控制问题提供离散方案，进行误差估计以及设计快速求解算法。